A food waste disposer and its cleaning method

Abstract

This invention relates to a food waste disposer and its cleaning method. The food waste disposer includes a housing with a water inlet, a feed inlet, and a discharge outlet connected to a grinding chamber; an agitator disposed within the grinding chamber; a sealing assembly disposed at the discharge outlet and capable of opening or closing the discharge outlet; a water inlet pipe connected to the water inlet of the housing and connected to a water inlet valve capable of controlling the flow of water within the disposer; a controller capable of sending a start signal to control the sealing assembly to block the discharge outlet, open the water inlet valve, and activate the agitator; and a detector used to detect the contamination level in the grinding chamber and to trigger the controller to send the start signal. After the food waste disposer finishes processing the waste, the contamination level in the grinding chamber is assessed to determine whether cleaning is necessary. This avoids cleaning the grinding chamber while it is already clean, preventing wasted effort and energy.

Description

Technical Field

[0001] This invention relates to the field of food waste treatment technology, specifically to a kitchen waste disposer and its cleaning method. Background Technology

[0002] A food waste disposer is a modern, environmentally friendly household appliance. It is installed under the kitchen sink and connected to the drain pipe. A high-speed motor drives the grinding components to grind and pulverize food waste such as small pieces of pork bones, chicken bones, fish bones, eggshells, melon rinds, fruit peels and pits, tea leaves, vegetable roots and leaves, coffee grounds, leftover food, scraps, breadcrumbs, etc., into powder or small granules, forming a paste-like liquid that is naturally discharged with water through the pipes. It has the beneficial effect of keeping the kitchen environment clean and reducing food waste.

[0003] In existing technologies, the internal structure of food waste disposers is relatively complex. Even after the food waste disposer has finished cleaning, food residues may still remain inside, which can easily breed bacteria and produce odors, thus negatively impacting the cleanliness of the kitchen and the comfort of use.

[0004] To address the aforementioned issues, Chinese invention patent application CN202110283836.7 (publication number CN113062418A) discloses a food waste disposer and its control system and cleaning method. This food waste disposer includes a housing, a grinding device disposed within the housing, and a controller electrically connected to the grinding device. The grinding device includes a grinding assembly and a motor that drives the grinding assembly. The food waste disposer also includes: a water inlet device comprising a water inlet pipe connected to the housing, a water inlet valve disposed on the water inlet pipe, and a liquid level sensor for detecting the liquid level in the grinding chamber of the housing; a drainage device comprising a drain pipe connected to the housing and a drain valve disposed on the drain pipe; and a sensing device for detecting one or more of a time signal, a viscosity signal of the mixed liquid in the drain pipe, and a flow rate signal, and feeding back the detection signal to the controller. The controller controls the motor to reverse direction based on the detection signal. This application cleans the inside of the grinding chamber with reverse water flow after food waste processing, resulting in better cleaning performance.

[0005] However, this food waste disposer has the following problems: 1. The cleaning method of this patent does not include a step to determine the contamination level of the grinding chamber. When the waste is roughly processed, the motor immediately reverses to clean the grinding chamber. Because the water inlet valve is always open during the waste processing, water is constantly flowing into the grinding chamber, carrying the waste outwards. In this process, the water flow also cleans the grinding chamber. Therefore, the grinding chamber may be clean after the waste is processed and does not require cleaning. However, this patent cleans the grinding chamber regardless of its cleanliness, which may lead to resource waste. 2. Although the patent has a detergent adding device, it cannot add detergent of appropriate concentration according to the contamination level of the grinding chamber. This may result in a high detergent concentration, leading to waste, or a low detergent concentration, resulting in poor cleaning effect. 3. When the motor reverses, it drives the grinding component to rotate in the opposite direction. The water flow stirred by the grinding component washes the inner wall of the grinding chamber. However, the grinding component is roughly flat, and the splash height of the water flow is limited. Areas far from the grinding component may not be washed. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a food waste disposer that first determines the contamination status of the grinding chamber and then determines whether the grinding chamber should be cleaned, in light of the current state of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a cleaning method for the above-mentioned food waste disposer, in view of the current state of the prior art.

[0008] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a food waste disposer, comprising...

[0009] The shell has a grinding chamber inside, and the shell is provided with a water inlet, a feed inlet and a discharge outlet that are connected to the grinding chamber;

[0010] An agitator, located in the grinding chamber, is used to agitate the water in the grinding chamber;

[0011] A sealing component is located at the discharge port and can open or close the discharge port;

[0012] A water inlet pipe is connected to the water inlet of the shell, and the water inlet pipe is connected to a water inlet valve that can control the flow of water inside the shell.

[0013] The controller is electrically connected to the agitator, the sealing assembly, and the water inlet valve, and can send a start signal to control the sealing assembly to block the outlet, open the water inlet valve, and start the agitator to work;

[0014] Its characteristic is that it also includes

[0015] The detector is used to detect contamination in the pulverizing chamber and can trigger the controller to send the start signal.

[0016] To improve the cleaning effect on the pulverizing chamber, the food waste disposer also includes a detergent adding device. This device includes a container for holding detergent and a dispensing port for detergent to flow out. The dispensing port is fluidly connected to the container and the pulverizing chamber. A valve is provided at the dispensing port to control its opening and closing, and the controller is electrically connected to the valve. This allows detergent to be added to the pulverizing chamber, as food waste disposers typically contain grease, and detergent is effective at cleaning grease.

[0017] The detergent dispensing device can be mounted on the housing, or it can include a dishwasher and a detergent dispenser. The dishwasher has a washing chamber inside, and the detergent dispenser is disposed in the washing chamber. The receiving cavity and the dispensing port are both located on the detergent dispenser. The dishwasher has a drain port connected to the washing chamber, and the drain port is fluidly connected to the water inlet pipe. Because dishwashers are usually equipped with a detergent dispenser, this application borrows from the dishwasher to dispense detergent into the washing chamber, resulting in a simplified structure.

[0018] In the above scheme, the detector is a camera installed in the grinding chamber; or, the detector is a turbidity sensor installed in the grinding chamber; or, the housing is provided with a vertically extending liquid level tube, the bottom of the liquid level tube is in fluid communication with the grinding chamber, and the detector is a pressure sensor installed at the top of the liquid level tube.

[0019] The sealing assembly can have various structural forms, such as a solenoid valve. Preferably, the sealing assembly includes...

[0020] A discharge pipe is located outside the crushing chamber and one end is installed at the discharge port. The discharge pipe is provided with a discharge hole.

[0021] A movable rod, at least partially inserted into the discharge pipe and capable of moving axially along the discharge pipe, can move towards or away from the discharge port. The movable rod can also block the discharge port. During the movement of the movable rod away from the discharge port, a vacuum section communicating with the discharge port is formed in the discharge pipe. This allows the movable rod to block the discharge port. When water is filled into the grinding chamber, and the movable rod is then moved away from the discharge port, similar to the principle of a syringe piston drawing a vacuum, a vacuum section is formed in the discharge pipe. Under the vacuum, the water in the grinding chamber is rapidly drawn into the discharge pipe. During this process, the rapidly flowing water washes away the garbage adhering to the grinding chamber and the discharge port, aiding in the cleaning of the grinding chamber and providing a large cleaning area for the garbage disposal unit.

[0022] To improve the reliability of forming a vacuum section in the discharge pipe during the movement of the moving rod, a sealing ring is provided between the outer peripheral wall of the moving rod and the inner wall of the discharge pipe.

[0023] In the above scheme, the inside of the discharge pipe is divided into a small diameter section and a large diameter section along the flow direction of the fluid. The inner diameter of the large diameter section is larger than that of the small diameter section. A limiting surface is formed at the junction of the large diameter section and the small diameter section. The small diameter section is connected to the discharge port. The moving rod includes a large diameter part that can slide in the large diameter section. The sealing ring is provided on the outer peripheral wall of the large diameter part. The end face of the large diameter part can abut against the limiting surface. During the process of the end face of the large diameter part moving away from the small diameter section, the vacuum section is formed between the limiting surface and the end face of the large diameter part.

[0024] To further improve the reliability of creating a vacuum section in the discharge pipe during the movement of the moving rod, the moving rod also includes a small-diameter section on the end face of the large-diameter section. The outer diameter of the large-diameter section is larger than the outer diameter of the small-diameter section. The small-diameter section is axially movable and inserted into the small-diameter section, and a sealing element is provided between the small-diameter section and the small-diameter section. In this way, multiple seals are formed between the moving rod and the discharge pipe, making it easier to create a vacuum in the discharge pipe during the pulling process of the moving rod.

[0025] The seal can be a sealing rib set on the peripheral wall of the small diameter section, or it can be a flexible plug set on the free end of the small diameter section.

[0026] To improve the sealing effect of the feed inlet, the plug can be inserted into the feed inlet and form a seal with the feed inlet.

[0027] The agitator can have various structural forms, such as directly using a grinding assembly. To increase the agitation range of the water flow, the agitator is an impeller. The impeller includes a vertically extending shaft and a first blade disposed on the shaft. The first blade cooperates with the shaft to form an axial flow structure that draws water from bottom to top. Thus, when the grinding chamber needs cleaning, the impeller's rotation can transport water from bottom to top and throw it out under centrifugal force, resulting in a large water flow range, allowing a large area of ​​the grinding chamber walls to be washed.

[0028] Preferably, the first blade is spirally wound around the rotating shaft along the axial direction, so that the first blade and the rotating shaft cooperate to form an axial flow structure that draws water from bottom to top, and the structure of the first blade is simple.

[0029] To further increase the likelihood of the impeller throwing water onto the wall of the pulverizing chamber, a second blade is also provided on the rotating shaft above the first blade. The second blade cooperates with the rotating shaft to form a centrifugal structure that conveys water radially along the shaft. The second blade receives the water transmitted by the first blade and uses centrifugal force to throw it onto the wall of the pulverizing chamber to rinse the wall.

[0030] Preferably, the second blade has multiple blades and is spaced apart circumferentially along the axis of rotation, with each second blade extending radially along the axis of rotation, so that the second blades cooperate with the axis of rotation to form a centrifugal structure that transports water radially along the axis of rotation.

[0031] Preferably, the upper and lower edges of each second blade are vertically offset, so that the second blade is inclined from top to bottom. In this way, the second blade can receive the water flow transmitted from the first blade to the maximum extent, and then throw it out diagonally upward.

[0032] The detector can trigger the controller through mechanical components. In this application, the detector is electrically connected to the input terminal of the controller.

[0033] The technical solution adopted by the present invention to solve the second technical problem mentioned above is: a cleaning method for the above-mentioned kitchen waste disposer, characterized in that it includes the following steps:

[0034] (1) The detector detects the contamination in the grinding chamber and sends a signal to the controller. The controller determines whether the grinding chamber needs to be cleaned. If yes, then step (2) is executed; otherwise, step (4) is executed.

[0035] (2) The controller controls the sealing component to close the discharge port, the controller controls the water inlet valve to open, and injects a certain amount of water into the crushing chamber from the water inlet. The controller controls the agitator to work to agitate the water flow to flush the garbage in the crushing chamber. After the agitator has worked for a set time, step (3) is executed.

[0036] (3) The agitator stops working, the sealing component opens the outlet, and the water carrying the washed-down garbage flows out from the outlet, and then returns to step (1).

[0037] (4) The food waste disposer is ready for use.

[0038] To improve the cleaning effect on the pulverizing chamber, the food waste disposer also includes a detergent adding device. This device includes a container for holding detergent and a dispensing port for detergent to flow out. The dispensing port is fluidly connected to the container and the pulverizing chamber. A valve is provided at the dispensing port to control its opening and closing, and the controller is electrically connected to the valve. This allows detergent to be added to the pulverizing chamber, as food waste disposers typically contain grease, and detergent is effective at cleaning grease.

[0039] One form of the detector is as follows: The detector is a camera disposed in the crushing chamber. In step (1), the method for determining whether the crushing chamber needs to be cleaned is as follows: The camera captures an image in the crushing chamber and then transmits the image to the controller. The controller performs image judgment, calculates the area of irregular objects, and calculates the difference between the area of irregular objects and a preset value. If the difference is 0, the crushing chamber does not need to be cleaned. If the difference is greater than 0, the crushing chamber needs to be cleaned.

[0040] In order to perform targeted cleaning according to different pollution degrees of the crushing chamber, the controller can also determine the pollution degree of the crushing chamber. The method for determining the pollution degree of the crushing chamber is as follows:

[0041] (1) The camera captures an image of the crushing chamber in a clean state and then transmits the image to the controller. The controller performs image judgment and calculates the area of irregular objects, denoted as the preset value S1;

[0042] (2) The camera captures an image of the crushing chamber in a polluted state and then transmits the image to the controller. The controller performs image judgment and calculates the area of irregular objects, denoted as the measured value S2;

[0043] (3) Calculate the difference between S2 and S1, denoted as C. If C≥100, it indicates severe pollution and the washing chamber cannot be cleaned. The controller controls the alarm to sound an alarm; if 50<C<100, it indicates serious pollution. The controller controls the valve to open, and the dosage of the detergent is A1; if 20<C≤50, it indicates moderate pollution. The controller controls the valve to open, and the dosage of the detergent is A2; if 0<C≤20, it indicates mild pollution. The controller controls the valve to open, and the dosage of the detergent is A3; if C = 0, it indicates no pollution and no cleaning is required. The controller controls the valve to close; where A1> A2> A3. In this way, if the pollution degree of the crushing chamber is large, more detergent is dispensed. If the pollution degree of the crushing chamber is small, less detergent is dispensed, avoiding waste caused by a high detergent concentration or poor cleaning effect due to a low detergent concentration and a high pollution degree.

[0044] Another form of the detector is as follows: The detector is a turbidity sensor disposed in the crushing chamber. In step (1), the method for determining whether the crushing chamber needs to be cleaned is as follows: The controller controls the blocking component to block the discharge port, controls the water inlet valve to open, injects a certain amount of water into the crushing chamber from the water inlet, then controls the stirring member to work, stirs the garbage in the crushing chamber into the water flow, and then the turbidity sensor detects the turbidity of the water flow. Calculate the difference between the measured value of the turbidity of the water flow detected by the turbidity sensor and the set value. If the difference is greater than 0, the crushing chamber needs to be cleaned. If the difference is 0, the crushing chamber does not need to be cleaned.

[0045] In order to perform targeted cleaning for different pollution degrees of the crushing cavity, the controller can also judge the pollution degree of the crushing cavity. The method for judging the pollution degree of the crushing cavity is as follows:

[0046] (1) Detect the turbidity value of the crushing cavity in a clean state through a turbidity sensor, and record it as the set value Z2;

[0047] (2) Detect the turbidity value of the crushing cavity in a polluted state through a turbidity sensor, and record it as the measured value Z1;

[0048] (3) Calculate the difference between Z1 and Z2, and record the difference as Z. If Z≥2000, it means severe pollution and the washing cavity cannot be cleaned, and the controller controls the alarm to sound an alarm; if 1000 < Z < 2000, it means serious pollution, the controller controls the valve to open, and the detergent dosage is A1; if 500 < Z ≤ 1000, it means moderate pollution, the controller controls the valve to open, and the detergent dosage is A2; if 0 < Z ≤ 500, it means mild pollution, the controller controls the valve to open, and the detergent dosage is A3; if Z = 0, it means there is no pollution and no cleaning is required, and the controller controls the valve to close; where A1 > A2 > A3. In this way, if the pollution degree of the crushing cavity is large, more detergent is put in; if the pollution degree of the crushing cavity is small, less detergent is put in, avoiding the waste caused by a high detergent concentration or the poor cleaning effect caused by a low detergent concentration and a high pollution degree.

[0049] Another form of the detector is as follows: A liquid level tube extending vertically is provided on the housing, and the bottom of the liquid level tube is in fluid communication with the crushing cavity. The detector is a pressure sensor provided at the top of the liquid level tube. In the step (1), the method for judging whether the crushing cavity needs to be cleaned is as follows: The controller controls the plugging component to block the discharge port, the controller controls the water inlet valve to open, inject a certain amount of water into the crushing cavity from the water inlet, after the pressure sensor transmits a signal to the controller and judges that the water surface reaches the set height, the controller controls the plugging component to open the discharge port, and then detect the pressure value of the pressure sensor after the water surface level drops within the set time, calculate the difference between the measured value and the set value. If the difference is greater than 0, the crushing cavity needs to be cleaned; if the difference is 0, the crushing cavity does not need to be cleaned.

[0050] In order to clean the crushing cavity针对性地进行清洗,所述控制器还能够判断粉碎腔的污染程度,判断粉碎腔的污染程度的方法为:压力传感器的实测值与预设值之间的差值记为C,如果C=200,则说明重度污染,洗涤腔无法清洁,控制器控制警报器发出警报;如果100<C<200,则说明严重污染,控制器控制阀门打开,洗涤剂的投放量为A1;如果20<C≤100,则说明中度污染,控制器控制阀门打开,洗涤剂的投放量为A2;如果0<C≤20,则说明轻度污染,控制器控制阀门打开,洗涤剂的投放量为A3;如果C=0,则说明没有污染,控制器控制阀门关闭;其中A1> A2> A3。这样如果粉碎腔的污染程度较大,则投放的洗涤剂较多,如果粉碎腔的污染程度较小,则投放的洗涤剂较少,避免出现洗涤剂浓度较高造成浪费,或者因为洗涤剂浓度较低,而污染程度高导致清洗效果较差的情况。

[0051] Compared with the prior art, the advantages of the present invention are as follows: By providing a detector capable of detecting the pollution condition in the crushing cavity, after the kitchen waste processor finishes processing the waste, the pollution condition in the crushing cavity can be judged first to determine whether cleaning is required. This avoids the situation where the crushing cavity is in a clean state but still being cleaned, thus avoiding wasted energy and useless work. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic structural diagram of the kitchen waste processor according to Embodiment 1 of the present invention;

[0053] Figure 2 is Figure 1 a cross-sectional view of (the plug opening the discharge port);

[0054] Figure 3 is Figure 2 a schematic structural diagram of the impeller in;

[0055] Figure 4 is Figure 3 a schematic diagram of the identification parameters of;

[0056] Figure 5 is a cross-sectional view of the plugging component (the plug closing the discharge port);

[0057] Figure 6 is Figure 5 a schematic structural diagram of the moving rod in;

[0058] Figure 7 is Figure 1 a schematic structural diagram of the kitchen waste processor cooperating with a dishwasher;

[0059] Figure 8 This is a flowchart illustrating Embodiment 1 of the present invention;

[0060] Figure 9 This is a flowchart illustrating Embodiment 2 of the present invention;

[0061] Figure 10 This is a cross-sectional view of the food waste disposer according to Embodiment 3 of the present invention;

[0062] Figure 11 This is a flowchart illustrating Embodiment 3 of the present invention;

[0063] Figure 12 This is a schematic diagram illustrating the working principle of the detector, controller, sealing assembly, inlet valve, and agitator. Detailed Implementation

[0064] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example 1

[0065] like Figures 1-7 As shown, the food waste disposer of this preferred embodiment includes a housing 1, an impeller 2, a sealing assembly 3, a detergent adding device, a detector, a controller, etc.

[0066] like Figure 1 , 2 As shown, the housing 1 has a crushing chamber 11 inside. The housing 1 is provided with a water inlet 12, a feed inlet 13 and a discharge outlet 14 that are connected to the crushing chamber 11. In this embodiment, the water inlet 12 and the feed inlet 13 are set independently. All solid or liquid materials in the crushing chamber 11 flow out from the discharge outlet 14. Of course, the water inlet 12 and the feed inlet 13 can also be the same, that is, water and waste enter the crushing chamber 11 from the same outlet.

[0067] like Figure 2 , 3 As shown in Figure 4, the impeller 2 is an agitator used to agitate the water flow in the pulverizing chamber 11. The impeller 2 is located in the pulverizing chamber 11 and includes a rotating shaft 21, a first blade 22 and a second blade 23. The rotating shaft 21 extends vertically and can rotate around its own axis. The first blade 22 and the second blade 23 are both located on the rotating shaft 21, and the second blade 23 is located above the first blade 22.

[0068] Preferably, the first blade 22 is spirally wound around the rotating shaft 21 along the axial direction of the rotating shaft 21, so that the first blade 22 and the rotating shaft 21 cooperate to form an axial flow structure that draws water from bottom to top.

[0069] The diameter of the first blade 22 is between 30mm and 40mm. If it is less than 30mm, the effective area of ​​the first blade 22 for water flow transmission is small and the power is insufficient. If it is greater than 40mm, the first blade 22 is prone to collision with the components on the grinding disc 4. The tilt angle α of the first blade 22 is between 20° and 30°. Within this range, the first blade 22 has high efficiency in conveying water flow upward.

[0070] The second blade 23 has multiple blades and is spaced apart circumferentially along the shaft 21. Preferably, there are 3 to 5 blades. If the number of second blades 23 is greater than 5, the displacement coefficient of the second blades 23 will increase, and the friction loss of the second blades 23 will also increase. If the number of second blades 23 is less than 3, the overall stability of the structure formed by the second blades 23 and the shaft 21 will deteriorate.

[0071] Each second blade 23 extends radially along the rotating shaft 21, so that the second blade 23 cooperates with the rotating shaft 21 to form a centrifugal structure that conveys water flow radially along the rotating shaft 21. The upper and lower edges of each second blade 23 are vertically offset, so that the second blade 23 is inclined from top to bottom. In this way, the second blade 23 can receive the water flow conveyed by the first blade 22 to the maximum extent, and then throw it out obliquely upward. The tilt angle β of the second blade 23 is between 30° and 90°. Different tilt angles result in different angles of water flow, which leads to different cleaning areas in the grinding chamber 11. It can be selected according to the areas that are prone to dirt accumulation. For example, dirt is prone to accumulate on the grinding disc 4, so the tilt angle can be set to close to 90°, with the blade facing the grinding disc 4, so that the grinding disc 4 can be cleaned in a focused manner.

[0072] The maximum width L between the upper and lower edges of the second blade 23 is between 10mm and 20mm. If it is less than 10mm, the effective area of ​​the second blade 23 is too small, the working water flow is small, and the cleaning effect is weak. If it is greater than 20mm, the blade is too large, occupies too much space, and the volume of the crushing chamber 11 is limited.

[0073] The second blade 23 receives the water transmitted from the first blade 22 and uses centrifugal force to throw it onto the wall of the grinding chamber 11 to rinse the wall of the grinding chamber 11.

[0074] A grinding disc 4 is horizontally arranged in the grinding chamber 11. The grinding disc 4 can adopt an existing structure, which will not be described in detail here. A drive mechanism 5 is located below the grinding disc 4. The drive mechanism 5 can be a motor. A rotating shaft 21 passes through the grinding disc 4 and is connected to the drive mechanism 5 for driving. The rotating shaft 21 is fixed relative to the grinding disc 4. In this way, the drive mechanism 5 can drive the grinding disc 4 and the impeller 2 to rotate simultaneously. Both the grinding disc 4 and the impeller 2 can not only agitate the water flow, but also cut the waste.

[0075] like Figure 2 ,5 As shown in Figure 6, the sealing assembly 3 includes a discharge pipe 31, a moving rod 32, a plug 33, and a driving component 34. The discharge pipe 31 is provided outside the crushing chamber 11. One end of the discharge pipe 31 is installed at the discharge port 14, and the discharge pipe 31 is provided with a discharge hole 311.

[0076] The movable rod 32 is at least partially inserted into the discharge pipe 31 and can move along the axial direction of the discharge pipe 31. The movable rod 32 can move toward or away from the discharge port 14, and the movable rod 32 can block the discharge port 14. During the process of the movable rod 32 moving away from the discharge port 14, a vacuum section 35 communicating with the discharge port 14 will be formed in the discharge pipe 31.

[0077] In this embodiment, the inside of the discharge pipe 31 is divided into a small diameter section 312 and a large diameter section 313 in sequence along the flow direction of the fluid. The inner diameter of the large diameter section 313 is larger than the inner diameter of the small diameter section 312. A limiting surface 314 is formed at the junction of the large diameter section 313 and the small diameter section 312. The small diameter section 312 is connected to the discharge port 14.

[0078] The movable rod 32 includes a large-diameter portion 321 that can slide in the large-diameter section 313 and a small-diameter portion 322 that can slide in the small-diameter section 312. The outer diameter of the large-diameter portion 321 is larger than the outer diameter of the small-diameter portion 322. A sealing ring 36 is provided on the outer peripheral wall of the large-diameter portion 321. The end face of the large-diameter portion 321 can abut against the limiting surface 314. The small-diameter portion 322 is provided on the end face of the large-diameter portion 321. The small-diameter portion 322 is axially movable and inserted into the small-diameter section 312. A sealing element is provided between the small-diameter portion 322 and the small-diameter section 312. During the process of the end face of the large-diameter portion 321 moving away from the small-diameter section 312, a vacuum section 35 is formed between the limiting surface 314 and the end face of the large-diameter portion 321.

[0079] The discharge hole 311 is located on the peripheral wall of the discharge pipe 31. The moving rod 32 can be moved to the state where the discharge port 14 and the discharge hole 311 on the discharge pipe 31 are connected. At this time, the water entering the discharge pipe 31 from the crushing chamber 11 can be discharged from the discharge pipe 31 through the discharge hole 311.

[0080] In this embodiment, the sealing element is a flexible plug 33 disposed on the free end of the small-diameter section 312, and the plug 33 can be inserted into the feed inlet 13 and form a seal with the feed inlet 13, such as... Figure 5 As shown.

[0081] A sealing rib 331 is provided around the periphery of the plug 33, and the sealing rib 331 is inclined towards the discharge port 14 along the direction in which the plug 33 is inserted. In this way, as the moving rod 32 moves away from the discharge port 14, the sealing between the plug 33 and the discharge pipe 31 is better, which is conducive to the formation of a vacuum section 35 in the discharge pipe 31.

[0082] To further improve the sealing effect of the plug 33, the sealing rib 331 has at least two turns and is spaced apart along the axial direction of the moving rod 32.

[0083] In this embodiment, the driving component 34 is a motor, which is driven and connected to the moving rod 32. The large diameter part 321 is provided with a driving rod 38, which is driven and connected to the driving component 34.

[0084] The detergent dispensing device includes a container for holding detergent and a dispensing port for detergent to flow out. The dispensing port is in fluid communication with the pulverizing chamber 11, and a valve is provided at the dispensing port to control its opening or closing. In this embodiment, the detergent dispensing device includes a dishwasher 6 and a detergent dispenser. The dishwasher 6 has a washing chamber inside, and the detergent dispenser is disposed in the washing chamber. Both the container and the dispensing port are located on the detergent dispenser. The dishwasher 6 has a drain outlet 61 connected to the washing chamber, and the drain outlet 61 is in fluid communication with the water inlet pipe 62. Since dishwashers 6 are usually equipped with detergent dispensers, this application borrows from dishwasher 6 to dispense detergent into the washing chamber, resulting in a simplified structure. Both the dishwasher 6 and its detergent dispenser can adopt existing structures, and the amount of detergent dispensed can be controlled by controlling the opening degree or opening time of the valve.

[0085] The drain outlet 61 of the dishwasher 6 is connected to the water inlet 12 of the housing 1 through the water inlet pipe 62. The water inlet pipe 62 is connected to the water inlet valve that can control the flow of water inside the dishwasher. The water inlet valve adopts an existing structure, such as a solenoid valve.

[0086] The controller is electrically connected to the agitator, the sealing assembly 3, and the water inlet valve, and can send a start signal to control the sealing assembly 3 to block the discharge port 14, open the water inlet valve, and start the agitator. The detector is used to detect contamination in the crushing chamber 11 and can trigger the controller to send the start signal. The working principle is as follows: Figure 12 As shown.

[0087] The detector can trigger the controller through mechanical components. In this embodiment, the detector is electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the drive component 34 of the blocking component 3, the drive mechanism 5 of the agitator, the water inlet valve, and the valve.

[0088] The detector is used to detect the contamination in the grinding chamber 11 so that the controller can determine whether the grinding chamber 11 needs to be cleaned. In this embodiment, the detector is a camera 7 installed in the grinding chamber 11.

[0089] When the grinding chamber 11 requires cleaning, the sealing component 3 blocks the discharge port 14, the water inlet valve opens, and the agitator operates. For example... Figure 9 As shown, the specific cleaning method of the food waste disposer in this embodiment is as follows:

[0090] (1) The detector detects the contamination in the grinding chamber 11 and sends a signal to the controller. The controller determines whether the grinding chamber 11 needs to be cleaned. If yes, then step (2) is executed; otherwise, step (4) is executed.

[0091] (2) The controller controls the sealing component 3 to close the discharge port 14, the controller controls the water inlet valve to open, and injects a certain amount of water into the crushing chamber 11 from the water inlet 12. The controller controls the agitator to work to agitate the water flow to flush the garbage in the crushing chamber 11. After the agitator has worked for a set time, step (3) is executed. It should be noted that in this step, the controller controls the valve to open, and detergent will enter the water inlet pipe 62 with the water flow and eventually enter the washing chamber 11.

[0092] (3) The agitator stops working, the sealing component 3 opens the discharge port 14, and the water carrying the washed-down garbage flows out from the discharge port 14, and then returns to step (1).

[0093] (4) The food waste disposer is ready for use.

[0094] In step (1) above, the method for determining whether the crushing chamber 11 needs to be cleaned is as follows: the camera 7 captures an image of the crushing chamber 11, and then transmits the image to the controller. The controller performs image judgment and calculates the area of ​​the irregular object. Then, it calculates the difference between the area of ​​the irregular object and the preset value. If the difference is 0, the crushing chamber 11 does not need to be cleaned. If the difference is greater than 0, the crushing chamber 11 needs to be cleaned.

[0095] Preferably, the controller can also determine the degree of contamination of the grinding chamber 11. The method for determining the degree of contamination of the grinding chamber 11 is as follows:

[0096] (1) The camera 7 captures an image of the crushing chamber 11 in a clean state, and then transmits the image to the controller. The controller performs image judgment and calculates the area of ​​the irregular object, which is denoted as S1.

[0097] (2) The camera 7 captures an image of the crushing chamber 11 in a contaminated state, and then transmits the image to the controller. The controller performs image judgment and calculates the area of ​​the irregular object, which is denoted as S2.

[0098] (3) Calculate the difference between S2 and S1, and denote the difference as C. If C ≥ 100, it indicates severe pollution and the washing chamber 11 cannot be cleaned. The controller controls the alarm to sound and contacts the manufacturer for on-site repair. If 50 < C < 100, it indicates serious pollution. The controller controls the valve to open, and the detergent dosage is A1. If 20 < C ≤ 50, it indicates moderate pollution. The controller controls the valve to open, and the detergent dosage is A2. If 0 < C ≤ 20, it indicates mild pollution. The controller controls the valve to open, and the detergent dosage is A3. If C = 0, it indicates no pollution and no cleaning is required. The controller controls the valve to close. Among them, A1 > A2 > A3. In this way, if the pollution degree of the crushing chamber 11 is relatively large, more detergent is put; if the pollution degree of the crushing chamber 11 is relatively small, less detergent is put, avoiding the waste caused by a relatively high detergent concentration or the poor cleaning effect due to a relatively low detergent concentration and a high pollution degree.

[0099] Among them, the concentration formed by the detergent with the dosage of A3 in the water of the washing chamber is 0.1% - 1%, the concentration formed by the detergent with the dosage of A2 in the water of the washing chamber is 1% - 2%, and the concentration formed by the detergent with the dosage of A1 in the water of the washing chamber is 2% - 3%. For example, 1% means 10 g of detergent is dissolved in 1 L of water. Embodiment 2

[0100] Such as Figure 8 、 10 As shown, the difference between Embodiment 2 and Embodiment 1 is that the detectors are different, and the corresponding methods for detecting whether the crushing chamber 11 needs to be cleaned are also different.

[0101] The detector is a turbidity sensor disposed in the crushing chamber 11. In step (1), the method for judging whether the crushing chamber 11 needs to be cleaned is as follows: The controller controls the blocking component 3 to block the discharge port 14, the controller controls the water inlet valve to open, injects a certain amount of water into the crushing chamber 11 from the water inlet 12, then the controller controls the stirring member to work, stirs the garbage in the crushing chamber 11 into the water flow, and then the turbidity sensor detects the turbidity of the water flow, calculates the difference between the measured value of the turbidity of the water flow detected by the turbidity sensor and the set value. If the difference is greater than 0, the crushing chamber 11 needs to be cleaned; if the difference is 0, the crushing chamber 11 does not need to be cleaned.

[0102] Preferably, the controller can also judge the pollution degree of the crushing chamber 11. The method for judging the pollution degree of the crushing chamber 11 is as follows:

[0103] (1) Detect the turbidity value of the crushing chamber 11 in the clean state through the turbidity sensor, and denote it as the set value Z2;

[0104] (2) Detect the turbidity value of the crushing chamber 11 in a contaminated state through a turbidity sensor, denoted as the measured value Z1;

[0105] (3) Calculate the difference between Z1 and Z2, and denote the difference as Z. If Z≥2000, it indicates severe pollution and cannot be solved by cleaning, and the controller controls the alarm to sound an alarm; if 1000 < Z < 2000, it indicates serious pollution, and the controller controls the valve to open, and the detergent dosage is A1; if 500 < Z ≤ 1000, it indicates moderate pollution, and the controller controls the valve to open, and the detergent dosage is A2; if 0 < Z ≤ 500, it indicates mild pollution, and the controller controls the valve to open, and the detergent dosage is A3; if Z = 0, it indicates no pollution and no cleaning is required, and the controller controls the valve to close; where A1 > A2 > A3. In this way, if the pollution degree of the crushing chamber 11 is relatively large, more detergent is put in, and if the pollution degree of the crushing chamber 11 is relatively small, less detergent is put in, avoiding the situation of waste caused by a relatively high detergent concentration or poor cleaning effect due to a relatively low detergent concentration and a high pollution degree. Embodiment 3

[0106] The difference between Embodiment 3 and Embodiment 1 is that the detector is different, and the corresponding method for detecting whether the crushing chamber 11 needs to be cleaned is also different.

[0107] As Figure 7 、 11 shown, a liquid level tube 8 extending vertically is provided on the housing 1, and the bottom of the liquid level tube 8 is in fluid communication with the crushing chamber 11. The detector is a pressure sensor 81 provided at the top of the liquid level tube 8. In step (1), the method for judging whether the crushing chamber 11 needs to be cleaned is: the controller controls the blocking component 3 to block the discharge port 14, the controller controls the water inlet valve to open, inject a certain amount of water into the crushing chamber 11 from the water inlet 12. After the pressure sensor 81 transmits a signal to the controller and judges that the water surface reaches the set height, the controller controls the blocking component 3 to open the discharge port 14, and then detects the pressure value of the pressure sensor 81 after the water surface level drops within the set time, calculates the difference between the measured value and the set value. If the difference is greater than 0, the crushing chamber needs to be cleaned. If the difference is 0, the crushing chamber does not need to be cleaned.

[0108] In order to clean the crushing chamber 11 targeted according to its different pollution degrees, the controller can also judge the pollution degree of the crushing chamber 11. The method for judging the pollution degree of the crushing chamber 11 is as follows: The difference between the measured value of the pressure sensor 81 and the preset value is denoted as C. If C = 200, it indicates severe pollution and cannot be solved by cleaning, and the controller controls the alarm to sound; if 100 < C < 200, it indicates serious pollution, the controller controls the valve to open, and the detergent dosage is A1; if 20 < C ≤ 100, it indicates moderate pollution, the controller controls the valve to open, and the detergent dosage is A2; if 0 < C ≤ 20, it indicates mild pollution, the controller controls the valve to open, and the detergent dosage is A3; if C = 0, it indicates no pollution, and the controller controls the valve to close; where A1 > A2 > A3. In this way, if the pollution degree of the crushing chamber 11 is large, more detergent is put; if the pollution degree of the crushing chamber 11 is small, less detergent is put, avoiding the waste caused by a high detergent concentration or the poor cleaning effect due to a low detergent concentration and a high pollution degree.

[0109] In this embodiment, the pressure sensor detects once per second, and the controller calculates the C value every 1 second until the time is 0:20. The maximum value among the 20 recorded C values is used as the final judgment value for judgment to improve accuracy.

[0110]

[0111] In the above embodiments, a certain amount of water is injected into the crushing chamber 11 from the water inlet 12. The control of the water volume can be achieved by setting a pressure sensor as in Embodiment 3. The pressure sensor senses the liquid level height in the crushing chamber to control the water volume.

[0112] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the disclosed embodiments of the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite or consistent with the gravity direction.

[0113] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A kitchen waste disposer, comprising a housing (1) having a crushing chamber (11) inside, the housing (1) being provided with a water inlet (12), a feed inlet (13) and a discharge outlet (14) communicating with the crushing chamber (11); an agitating member arranged in the crushing chamber (11) for agitating water in the crushing chamber (11); a blocking assembly (3) arranged at the discharge outlet (14) and capable of opening or closing the discharge outlet (14); a water inlet pipe (62) connected with the water inlet (12) of the housing (1), the water inlet pipe (62) being connected with a water inlet valve capable of controlling the opening and closing of the water passage inside the water inlet pipe (62); a controller electrically connected with the agitating member, the blocking assembly (3) and the water inlet valve and capable of sending a starting signal to control the blocking assembly (3) to block the discharge outlet (14), the water inlet valve to be opened and the agitating member to be started; characterized in that further comprising a detector for detecting the pollution condition in the crushing chamber (11) and capable of triggering the controller to send the starting signal; the blocking assembly (3) comprising a discharge pipe (31) located outside the crushing chamber (11) and mounted at one end of the discharge outlet (14), the discharge pipe (31) being provided with a discharge hole (311); a moving rod (32) at least partially inserted into the discharge pipe (31) and capable of moving along the axial direction of the discharge pipe (31), a sealing ring (36) being arranged between the outer peripheral wall of the moving rod (32) and the inner wall surface of the discharge pipe (31), the moving rod (32) being capable of moving towards or away from the discharge outlet (14), and the moving rod (32) being capable of blocking the discharge outlet (14), and a vacuum section (35) communicating with the discharge outlet (14) being formed in the discharge pipe (31) during the moving rod (32) moving away from the discharge outlet (14).

2. The garbage disposer of claim 1, wherein: further comprising a detergent adding device, the detergent adding device comprising a containing cavity containing detergent and a discharge opening through which the detergent flows out, the discharge opening fluidly communicating the containing cavity with the crushing chamber (11), the discharge opening being provided with a valve capable of controlling the opening and closing of the discharge opening, the controller being electrically connected with the valve.

3. The garbage disposer of claim 2, wherein: the detergent adding device comprising a dishwasher (6) and a detergent dispenser, the dishwasher (6) having a washing chamber inside, the detergent dispenser being arranged in the washing chamber, the containing cavity and the discharge opening being arranged on the detergent dispenser, the dishwasher (6) being provided with a drain opening (61) communicating with the washing chamber, the drain opening (61) fluidly communicating with the water inlet pipe (62).

4. The garbage disposer of claim 1, wherein: the detector being a camera (7) arranged in the crushing chamber (11), or the detector being a turbidity sensor arranged in the crushing chamber (11), or the housing (1) being provided with a vertically extending liquid level pipe (8), the bottom of the liquid level pipe (8) fluidly communicating with the crushing chamber (11), and the detector being a pressure sensor (81) arranged at the top of the liquid level pipe (8).

5. The garbage disposer of claim 1, wherein: The discharge pipe (31) is internally divided into a small-diameter section (312) and a large-diameter section (313) in sequence along the flow direction of the fluid, the inner diameter of the large-diameter section (313) is larger than that of the small-diameter section (312), the abutting portion of the large-diameter section (313) and the small-diameter section (312) forms a limiting surface (314), the small-diameter section (312) is in communication with the discharge port (14), the moving rod (32) comprises a large-diameter part (321) capable of sliding in the large-diameter section (313), the sealing ring (36) is arranged on the outer peripheral wall of the large-diameter part (321), the end surface of the large-diameter part (321) is capable of abutting against the limiting surface (314), and the limiting surface (314) and the end surface of the large-diameter part (321) form the vacuum section (35) during the movement of the end surface of the large-diameter part (321) away from the small-diameter section (312).

6. The garbage disposer of claim 5, wherein: The moving rod (32) further comprises a small-diameter part (322) arranged on the end surface of the large-diameter part (321), the outer diameter of the large-diameter part (321) is larger than that of the small-diameter part (322), the small-diameter part (322) is capable of axially moving and being inserted in the small-diameter section (312), and a sealing member is arranged between the small-diameter part (322) and the small-diameter section (312).

7. The garbage disposer of claim 6, wherein: The sealing member is a flexible plug (33) arranged on the free end of the small-diameter section (312).

8. The garbage disposer of claim 7, wherein: The plug (33) is capable of being inserted in the feed port (13) and forming a seal with the feed port (13).

9. The garbage disposer of any one of claims 1-4, wherein: The stirring member is an impeller (2), and the impeller (2) comprises a vertically extending rotating shaft (21) and a first blade (22) arranged on the rotating shaft (21), the first blade (22) and the rotating shaft (21) cooperatively form an axial flow structure for drawing water flow from bottom to top.

10. The garbage disposer of claim 9, wherein: The first blade (22) is spirally wound on the rotating shaft (21) along the axial direction of the rotating shaft (21), so that the first blade (22) and the rotating shaft (21) cooperatively form an axial flow structure for drawing water flow from bottom to top.

11. The garbage disposer of claim 9, wherein: The rotating shaft (21) further comprises a second blade (23) arranged above the first blade (22), the second blade (23) and the rotating shaft (21) cooperatively form a centrifugal structure for radially conveying water flow along the rotating shaft (21).

12. The garbage disposer of claim 11, wherein: The second blade (23) has a plurality of pieces and is arranged in a spaced manner along the circumferential direction of the rotating shaft (21), each piece of the second blade (23) extends along the radial direction of the rotating shaft (21), so that the second blade (23) and the rotating shaft (21) cooperatively form a centrifugal structure for radially conveying water flow along the rotating shaft (21).

13. The garbage disposer of claim 12, wherein: The upper edge and the lower edge of each piece of the second blade (23) are vertically staggered, so that the second blade (23) is arranged in a downwardly inclined manner.

14. The garbage disposer of claim 1, wherein: The detector and the controller are electrically connected.

15. A method of cleaning the garbage disposer of claim 14, wherein: The method comprises the following steps: (1) the detector detects the pollution condition in the crushing cavity (11), sends a signal to the controller, the controller judges whether the crushing cavity (11) needs to be cleaned, if yes, step (2) is performed, and if no, step (4) is performed. (2) the controller controls the blocking assembly (3) to close the discharge port (14), the controller controls the water inlet valve to open, a certain amount of water is injected into the crushing cavity (11) from the water inlet (12), the controller controls the stirring member to work to stir the water flow to flush the garbage on the crushing cavity (11), and the stirring member works for a set time, and then step (3) is performed; (3) the stirring member stops working, the blocking assembly (3) opens the discharge port (14), the water carrying the flushed garbage flows out from the discharge port (14), and then returns to step (1); (4) the kitchen garbage disposer waits for use.

16. The method of claim 15, wherein: The kitchen garbage disposer further comprises a detergent adding device, the detergent adding device comprises a containing cavity containing detergent and a pouring port for the detergent to flow out, the pouring port is in fluid communication with the crushing cavity (11), and a valve capable of controlling the opening or closing of the pouring port is arranged at the pouring port; in step (2), the valve is opened to pour detergent into the crushing cavity (11).

17. The method of claim 16, wherein: The detector is a camera (7) arranged in the crushing cavity (11), in step (1), the method for judging whether the crushing cavity (11) needs to be cleaned is that the camera (7) shoots the image in the crushing cavity (11), then the image is transmitted to the controller, the controller judges the image and calculates the area of the irregular object, and calculates the difference between the area of the irregular object and a preset value, if the difference is 0, the crushing cavity (11) does not need to be cleaned, and if the difference is greater than 0, the crushing cavity (11) needs to be cleaned.

18. The method of claim 17, wherein: The controller can also judge the pollution degree of the crushing cavity (11), and the method for judging the pollution degree of the crushing cavity (11) is: (1) the camera (7) shoots the image of the crushing cavity (11) in the clean state, then the image is transmitted to the controller, the controller judges the image and calculates the area of the irregular object, and the area is recorded as S1; (2) the camera (7) shoots the image of the crushing cavity (11) in the polluted state, then the image is transmitted to the controller, the controller judges the image and calculates the area of the irregular object, and the area is recorded as S2; (3) the difference between S2 and S1 is calculated, the difference is recorded as C, if C is greater than or equal to 100, it means severe pollution, which cannot be solved by cleaning, the controller controls the alarm to issue an alarm, if 50 is less than C and C is less than 100, it means serious pollution, the controller controls the valve to open, and the pouring amount of the detergent is A1; if 20 is less than C and C is less than or equal to 50, it means moderate pollution, the controller controls the valve to open, and the pouring amount of the detergent is A2; if 0 is less than C and C is less than or equal to 20, it means mild pollution, the controller controls the valve to open, and the pouring amount of the detergent is A3; if C is 0, it means no pollution and no cleaning is needed, and the controller controls the valve to close; wherein A1> A2> A3.

19. The method of claim 16, wherein: The detector is a turbidity sensor arranged in the crushing cavity (11), and in the step (1), the method for judging whether the crushing cavity (11) needs to be cleaned is that the controller controls the blocking assembly (3) to block the discharge port (14), the controller controls the water inlet valve to open to inject a certain amount of water into the crushing cavity (11) from the water inlet (12), then the controller controls the stirring member to work to stir the garbage in the crushing cavity (11) into the water flow, then the turbidity sensor detects the turbidity of the water flow, calculates the difference between the measured value and the set value of the turbidity of the water flow detected by the turbidity sensor, if the difference is greater than 0, the crushing cavity needs to be cleaned, and if the difference is 0, the crushing cavity does not need to be cleaned.

20. The method of claim 19, wherein: The controller can also judge the pollution degree of the crushing cavity (11), and the method for judging the pollution degree of the crushing cavity (11) is: (1) the turbidity value of the crushing cavity (11) in the clean state is detected by the turbidity sensor, which is recorded as a preset value Z2; (2) the turbidity value of the crushing cavity (11) in the contaminated state is detected by the turbidity sensor, which is recorded as a measured value Z1; (3) the difference between Z1 and Z2 is calculated, and the difference is recorded as Z. If Z≥2000, it means severe pollution, which cannot be solved by cleaning, and the controller controls the alarm to issue an alarm; if 1000<Z<2000, it means serious pollution, the controller controls the valve to open, and the dosage of the detergent is A1; if 500<Z≤1000, it means moderate pollution, the controller controls the valve to open, and the dosage of the detergent is A2; if 0<Z≤500, it means mild pollution, the controller controls the valve to open, and the dosage of the detergent is A3; if Z=0, it means no pollution, and the controller controls the valve to close; wherein A1> A2> A3.

21. The method of claim 16, wherein: The shell (1) is provided with a vertically extending liquid level pipe (8), the bottom of the liquid level pipe (8) is in fluid communication with the crushing cavity (11), and the detector is a pressure sensor (81) arranged at the top of the liquid level pipe (8). In the step (1), the method for judging whether the crushing cavity (11) needs to be cleaned is that the controller controls the blocking assembly (3) to block the discharge port (14), the controller controls the water inlet valve to open, a certain amount of water is injected into the crushing cavity (11) from the water inlet (12), the pressure sensor (81) transmits a signal to the controller and judges that the water surface reaches a set height, then the controller controls the blocking assembly (3) to open the discharge port (14), then detects the pressure value of the pressure sensor (81) after the water surface liquid level drops in a set time, calculates the difference between the measured value and the set value, if the difference is greater than 0, the crushing cavity needs to be cleaned, and if the difference is 0, the crushing cavity does not need to be cleaned.

22. The method of claim 21, wherein: The controller can also determine the degree of contamination of the crushing cavity (11), and the method for determining the degree of contamination of the crushing cavity (11) is that the difference between the actual value of the pressure sensor (81) and the preset value is C, if C = 200, it means severe contamination, which cannot be solved by cleaning, and the controller controls the alarm to issue an alarm; if 100 < C < 200, it means serious contamination, the controller controls the valve to open, and the amount of detergent A1 is put; if 20 < C ≤ 100, it means moderate contamination, the controller controls the valve to open, and the amount of detergent A2 is put; if 0 < C ≤ 20, it means mild contamination, the controller controls the valve to open, and the amount of detergent A3 is put; if C = 0, it means no contamination, and the controller controls the valve to close; wherein A1 > A2 > A3.

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