CN210045644U - Cleaning device and cleaning machine - Google Patents

Abstract

The utility model provides a cleaning device and a cleaning machine. The cleaning device comprises: an air pump, which is used for generating compressed gas; a liquid storage cylinder; There is a liquid outlet, so that the compressed gas generated by the air pump enters the common rail system to drive the flow of the liquid entering the common rail system from the liquid storage tank, so that the liquid in the common rail system is driven by the compressed gas. The liquid outlet of the common rail system flows out; the injection device, the injection device is connected with the air outlet of the air pump and the liquid outlet of the common rail system, so that the compressed gas generated by the air pump and the gas entering the common rail system from the liquid storage cylinder are connected. The fluids are all ejected from the spray device. The cleaning device of the utility model solves the problem in the prior art that it is difficult to realize the cleaning of the sensor in the vehicle-mounted environment.

Description

Cleaning devices and cleaning machines

technical field

The utility model relates to the field of vehicle-mounted sensor cleaning equipment, in particular to a cleaning device and a cleaning machine.

Background technique

With the popularity of the concept of self-driving cars, people are investing more and more resources in the field of self-driving cars. For self-driving cars, sensors are an indispensable element, through which the self-driving car can effectively perceive the surrounding environment. obstacles to avoid them.

The current self-driving cars contain various sensors. After using these sensors for a period of time, the effective light-transmitting surface of these sensors is easily covered with dust, which deteriorates the working sensitivity of the sensors and needs to be cleaned in time. At present, the cleaning of the sensor needs to use an air pump, a high-power high-pressure pump, etc., and a high-power high-pressure pump cannot be provided in the vehicle environment, and the use of a low-power pump cannot achieve a good cleaning effect.

It can be seen that the existing technology cannot provide a high-power high-pressure pump, so it is difficult to clean the sensor in the vehicle environment, and it is necessary to regularly go to the cleaning point for cleaning, which limits the application of autonomous vehicles.

Utility model content

The main purpose of the utility model is to provide a cleaning device and a cleaning machine, so as to solve the problem that it is difficult to realize the cleaning of the sensor in the vehicle environment in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a cleaning device is provided, the cleaning device includes: an air pump, the air pump is used to generate compressed gas; a liquid storage cylinder; a common rail system, a common rail system, an air pump and a liquid storage cylinder The common rail system is also provided with a liquid outlet, so that the compressed gas generated by the air pump enters the common rail system to drive the liquid flow from the liquid storage cylinder into the common rail system, so that the liquid in the common rail system can flow. Driven by the compressed gas, it flows out from the liquid outlet of the common rail system; the injection device is connected with the air outlet of the air pump and the liquid outlet of the common rail system, so that the compressed gas generated by the air pump and the liquid storage device are connected to each other. The fluid that the cylinder enters into the common rail system is sprayed from the injection device.

Further, the cleaning device also includes: an air storage tank, the air storage tank is provided with an inlet, a first outlet, and a second outlet, the inlet of the air storage tank is communicated with the air outlet of the air pump, and the first outlet of the air storage tank is connected to the injection device. The second outlet of the air storage tank is communicated with the common rail system, so that the compressed gas generated by the air pump is respectively delivered to the injection device and the common rail system through the air storage tank.

Further, the cleaning device also includes a pneumatic booster pump, the pneumatic booster pump is arranged between the air pump and the air storage tank, the inlet of the pneumatic booster pump is connected with the air outlet of the air pump, and the outlet of the pneumatic booster pump is connected with the air storage tank. The inlet is connected; wherein, the driving gas input port of the pneumatic booster pump is connected with the air outlet of the air pump, so that the compressed gas generated by the air pump drives the pneumatic booster pump to act.

Further, the spray device includes an air knife part and a spray head, the inlet of the air knife part is communicated with the air outlet of the air pump, and the inlet of the spray head is communicated with the liquid outlet of the common rail system.

Further, the spray device includes an air knife part and a spray head, the inlet of the air knife part is communicated with the first outlet of the air storage tank, and the inlet of the spray head is communicated with the liquid outlet of the common rail system.

Further, the air jet port of the air knife component is strip-shaped or annular, and the liquid jet port of the spray head is a conical structure.

Further, the air outlet end face of the air jet port of the air knife component is inclined upward at a first predetermined angle relative to the first predetermined horizontal plane; and/or, the jet port of the spray head is located on the upper side of the air knife component and faces the upper side of the air knife component For spraying, the lowermost generatrix of the conical structure of the liquid discharge port of the spray head is parallel to the horizontal plane.

Further, a plurality of spray heads are provided, and the plurality of spray heads are arranged at intervals along the extending direction of the air jet port of the air knife member, or the plurality of spray heads are arranged at intervals around the air jet port of the air knife member.

Further, a plurality of inlets of the air-knife component are provided, and the plurality of inlets are arranged at intervals along the extending direction of the air-jet port of the air-knife component, or the plurality of inlets are arranged at intervals around the air-jet port of the air-knife component.

Further, an air duct is provided on the air knife component, the air duct communicates with the inlet and the air jet, and the air duct has a curved channel section.

Further, the common rail system includes: a dual-chamber air storage tank, the dual-chamber air storage tank includes a first chamber and a second chamber, and both the first chamber and the second chamber are communicated with the second outlet of the air storage tank, Solenoid valves are provided on the connection pipeline between the inlet of the first chamber and the gas storage tank and the connection pipeline between the inlet of the second chamber and the gas storage tank; the first cylinder, the interior of the first cylinder is provided with a columnar valve a cavity, a first piston that can move along the cylindrical cavity is installed inside the first cylinder, two ends of the first cylinder are respectively communicated with the first chamber and the second chamber, and the space between the first cylinder and the first chamber is A first one-way valve is provided on the connecting pipeline of the first cylinder and the connecting pipeline between the first cylinder and the second chamber, and the outlet of the first one-way valve is arranged towards the first cylinder; There is a second piston, the first end of the second cylinder is communicated with one end of the first cylinder, the connecting pipeline between the second cylinder and the first cylinder is equipped with a second one-way valve, and the outlet of the second one-way valve faces the first cylinder. Two cylinders are provided; the second end of the second cylinder is communicated with the liquid storage cylinder, a pump and a third one-way valve are installed on the connecting pipeline between the second cylinder and the liquid storage cylinder, and the outlet of the third one-way valve faces the second cylinder. The cylinder is arranged, and the liquid outlet of the common rail system is communicated with the second end of the second cylinder.

Further, there are two second cylinders, and the first ends of the two second cylinders are respectively connected with two ends of the first cylinder in a one-to-one correspondence.

According to another aspect of the present invention, a cleaning machine is provided, the cleaning machine includes a cleaning device, and the cleaning device is the above-mentioned cleaning device.

The cleaning device applying the technical solution of the utility model comprises: an air pump, which is used to generate compressed gas; a liquid storage cylinder; In order to make the compressed gas generated by the air pump enter the common rail system to drive the liquid flow from the liquid storage tank into the common rail system, so that the liquid in the common rail system is driven by the compressed gas to flow out of the common rail system. Outflow; injection device, the injection device is communicated with the air outlet of the air pump and the liquid outlet of the common rail system, so that the compressed gas generated by the air pump and the fluid entering the common rail system from the liquid storage tank are sprayed from the injection device. out. The common rail system is adopted, so that the compressed gas generated by the air pump drives the liquid flow in the common rail system to increase the flow rate of the liquid. By using a high-power high-pressure pump, a better cleaning effect can be achieved, which solves the problem in the prior art that it is difficult to clean the sensor in a vehicle-mounted environment.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 shows the principle schematic diagram of the cleaning device according to the present invention;

FIG. 2 shows a schematic structural diagram of the first embodiment of the cleaning device according to the present invention;

FIG. 3 shows a schematic cross-sectional structure diagram of the first embodiment of the cleaning device according to the present invention;

Fig. 4 shows the structural schematic diagram of the second embodiment of the cleaning device according to the present invention;

FIG. 5 shows a schematic cross-sectional structure diagram of a second embodiment of the cleaning device according to the present invention; and

FIG. 6 shows a schematic structural diagram of the common rail system of the cleaning device according to the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

1. Air pump; 2. Pneumatic booster pump; 3. Air storage tank; 4. Common rail system; 41. Double-chamber air storage tank; 42. The first cylinder; , the second piston; 44, the solenoid valve; 45, the first one-way valve; 46, the second one-way valve; 47, the pump; 48, the third one-way valve; 5, the liquid reservoir; 6, the injection device; 61 , air knife parts; 62, nozzle; 611, inlet; 612, jet port; 613, air duct; 7, sensor light-transmitting surface.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Please refer to FIGS. 1 to 6 , the cleaning device of the present invention includes: an air pump 1, which is used to generate compressed gas; a liquid storage cylinder 5; The common rail system 4 is also provided with a liquid outlet, so that the compressed gas generated by the air pump 1 enters the common rail system 4 to drive the liquid flowing into the common rail system 4 from the liquid storage cylinder 5, so that the liquid in the common rail system 4 flows. The liquid in the system 4 flows out from the liquid outlet of the common rail system 4 driven by the compressed gas; the injection device 6, the injection device 6 is connected with the air outlet of the air pump 1 and the liquid outlet of the common rail system 4, so that the Both the compressed gas generated by the air pump 1 and the fluid entering the common rail system 4 from the liquid storage cylinder 5 are ejected from the injection device 6 .

The cleaning device of the present invention generates compressed gas through the air pump 1, a part of the compressed gas is directly sprayed through the spray device 6, and the other part of the compressed gas and the liquid in the liquid storage cylinder 5 enter the common rail system 4, and this part of the compressed gas drives the common rail system. The liquid inside is sprayed out by the spray device 6 , and the high-pressure gas and liquid sprayed out by the spray device 6 can clean the light-transmitting surface 7 of the sensor. Using the common rail system 4, the compressed gas generated by the air pump 1 drives the liquid flow in the common rail system 4 to increase the flow rate of the liquid, and the compressed gas and liquid are ejected from the spray device respectively, and the light-transmitting surface of the sensor is washed and cleaned. For cleaning, a better cleaning effect can be achieved without using a high-power high-pressure pump, which solves the problem that it is difficult to clean the sensor in a vehicle-mounted environment in the prior art.

It should be noted that the ejection device 6 and the air outlet of the air pump 1 can be directly communicated or communicated through other intermediate components. The common rail system 4 and the outlet of the air pump 1 can be communicated directly or through other intermediate components, the purpose of which is to realize the introduction of the compressed gas generated by the air pump 1 into the common rail system 4 .

In order to make the supply of the compressed gas more uniform and stable, and to make the pressure control of the compressed gas more reliable, the cleaning device further includes: a gas storage tank 3, and the gas storage tank 3 is provided with an inlet, a first outlet, and a second outlet, The inlet of the air storage tank 3 is connected with the air outlet of the air pump 1, the first outlet of the air storage tank 3 is connected with the injection device 6, and the second outlet of the air storage tank 3 is connected with the common rail system 4, so that the compressed gas generated by the air pump 1 is connected. The gas is supplied to the injection device 6 and the common rail system 4 respectively via the gas storage tank 3 .

In order to further increase the pressure of the compressed air to achieve a better washing effect, and taking into account the supply of energy in the vehicle environment, the cleaning device also includes a pneumatic booster pump 2, which is arranged in the air pump 1 and the air storage. Between the tanks 3, the inlet of the pneumatic booster pump 2 is connected with the air outlet of the air pump 1, and the outlet of the pneumatic booster pump 2 is connected with the inlet of the air storage tank 3; wherein, the driving gas input port of the pneumatic booster pump 2 is connected with the air pump The air outlet of 1 is connected, so that the compressed gas generated by the air pump 1 drives the pneumatic booster pump 2 to act. Among them, the pneumatic booster pump 2 selects a gas booster pump, which is driven by the compressed gas generated by the gas pump 1, and further compresses the compressed gas generated by the gas pump 1, thereby increasing the pressure of the compressed air, and the driving gas of the pneumatic booster pump 2 The input port is used to supply driving gas to the pneumatic booster pump 2 , and this part of the driving gas is used to drive the pneumatic booster pump 2 to act.

Specifically, as an optional method, the spray device 6 includes an air knife part 61 and a spray head 62 , the inlet 611 of the air knife part 61 is communicated with the air outlet of the air pump 1 , and the inlet of the spray head 62 is connected with the liquid outlet of the common rail system 4 . Connected. In this way, the spray device 6 can spray high-pressure gas and liquid respectively through the air knife part 61 and the spray head 62. When in use, the liquid can be sprayed to the light-transmitting surface 7 of the sensor first, and then the high-pressure gas can be sprayed to the light-transmitting surface 7 of the sensor. The liquid and high-pressure gas can be sprayed onto the light-transmitting surface 7 of the sensor at the same time to remove impurities on the light-transmitting surface 7 of the sensor.

It should be noted that the inlet 611 of the air knife part 61 can be directly communicated with the air outlet of the air pump 1, or it can be communicated through other intermediate parts. .

As another optional way, the spray device 6 includes an air knife part 61 and a spray head 62 , the inlet 611 of the air knife part 61 is communicated with the first outlet of the air storage tank 3 , and the inlet of the spray head 62 is connected with the liquid outlet of the common rail system 4 mouth connection. In this way, the air storage tank 3 can supply the compressed gas to the air knife component 61 and the common rail system 4 more stably, so that the cleaning operation is more stable.

In specific implementation, the air jet port 612 of the air knife part 61 is strip or ring shape, and the strip or ring shape can be flexibly selected according to the shape of the sensor light-transmitting surface 7 , as shown in FIG. 2 and FIG. 3 , when the sensor light-transmitting surface When 7 is a plane, the air-knife part 61 with the air outlet 612 as a strip can be selected; as shown in Figures 4 and 5, when the sensor light-transmitting surface 7 is annular, the air-knife part 61 with the air outlet 612 as a ring can be selected. , the liquid ejection port of the nozzle 62 is of a conical structure. In this way, the shape of the light-transmitting surface 7 of the sensor can be better adapted to improve the cleaning effect and cleaning efficiency.

Specifically, the air outlet end face of the air jet port 612 of the air knife member 61 is inclined upward at a first predetermined angle with respect to the first predetermined horizontal plane; and/or the jet port of the spray head 62 is located on the upper side of the air knife member 61 and faces the wind. The uppermost of the blade member 61 is sprayed, and the lowermost generatrix of the tapered structure of the liquid discharge port of the spray head 62 is parallel to the horizontal plane. In this way, the spray head 62 can more efficiently spray the liquid onto the light-transmitting surface 7 of the sensor, thereby improving the cleaning effect.

According to actual needs, there are multiple nozzles 62 , and the multiple nozzles 62 are arranged at intervals along the extending direction of the air jets 612 of the air knife member 61 , or the plurality of nozzles 62 are arranged at intervals around the air jets 612 of the air knife member 61 . When the air jet 612 is a strip-shaped air knife part 61, the plurality of nozzles 62 are arranged in a straight line along the air jet 612; when the air jet 612 is an annular air knife part 61, the plurality of jets 62 are arranged along the air jet The 612 is arranged in a ring shape, so that the uniformity of the spraying of the spraying head 62 can be improved. In order to make the spraying of the spraying heads 62 more uniform, the distances between adjacent spraying heads 62 are equal.

In order to uniformly spray the air at different positions of the air-jet port 612 of the air-knife part 61, there are multiple inlets 611 of the air-knife part 61, and the plurality of inlets 611 are arranged at intervals along the extending direction of the air-jet port 612 of the air-knife part 61, or a plurality of inlets 611 are provided. The inlets 611 are arranged at intervals around the air jet ports 612 of the air knife member 61 . Of course, when the air-knife member 61 with the air-jet port 612 is a strip, the plurality of inlets 611 are arranged in a straight line along the air-jet port 612; when the air-jet port 612 is the annular air-knife member 61, the plurality of inlets 611 are arranged along The air jets 612 are arranged in an annular shape, so that the compressed air can be supplied to the air knife part 61 evenly, thereby ensuring that the air jets 612 of the air knife part 61 are evenly jetted at all positions.

Specifically, as shown in FIG. 5 , the air knife component 61 is provided with an air duct 613 , the air duct 613 is connected to the inlet 611 and the air jet port 612 , and the air duct 613 has a curved channel section. By making the air duct 613 have a bent channel section, the turbulence of the compressed air in the channel can be increased, which is beneficial to make the compressed air fill the air duct 613 more uniformly, so as to be ejected more uniformly through the air jet port 612 .

Specifically, as shown in FIG. 6 , the common rail system 4 includes: a dual-chamber air storage tank 41 , the dual-chamber air storage tank 41 includes a first chamber and a second chamber, and the first chamber and the second chamber are The second outlet of the gas storage tank 3 is connected, and a solenoid valve is provided on the connecting pipeline between the inlet of the first chamber and the gas storage tank 3 and the connecting pipeline between the inlet of the second chamber and the gas storage tank 3 44; the first cylinder 42, the interior of the first cylinder 42 is provided with a cylindrical cavity, the interior of the first cylinder 42 is installed with a first piston 421 that can move along the cylindrical cavity, and the two ends of the first cylinder 42 are respectively connected to the first cavity. The connecting pipe between the first cylinder 42 and the first chamber and the connecting pipe between the first cylinder 42 and the second chamber are all provided with a first one-way valve 45. The outlet of a one-way valve 45 is arranged towards the first cylinder 42; the second cylinder 43, the second cylinder 43 is equipped with a second piston 431, the first end of the second cylinder 43 is connected with one end of the first cylinder 42, the second cylinder 43 is A second one-way valve 46 is installed on the connecting pipeline between the cylinder 43 and the first cylinder 42, and the outlet of the second one-way valve 46 is arranged towards the second cylinder 43; the second end of the second cylinder 43 is connected to the liquid storage cylinder 5 The connection pipeline between the second cylinder 43 and the liquid storage cylinder 5 is equipped with a pump 47 and a third one-way valve 48, the outlet of the third one-way valve 48 is set towards the second cylinder 43, and the outlet of the common rail system 4 is The liquid port communicates with the second end of the second cylinder 43 .

During the specific working process of the common rail system 4, the pump 47 transports the liquid in the liquid storage cylinder 5 to the second cylinder 43, and by controlling the switches of the two solenoid valves 44, the first chamber and the second chamber can be controlled. The amount of intake air changes the pressure in the first chamber and the second chamber. Under the action of the internal pressure difference between the first chamber and the second chamber, the first piston 421 is driven to move in the first cylinder 42, so that the The compressed gas inside the first cylinder 42 enters the second cylinder 43, drives the second piston 431 in the second cylinder 43 to move, and drives the liquid in the second cylinder 43 to spray through the liquid outlet of the common rail system 4 out.

Specifically, there are two second cylinders 43 , and the first ends of the two second cylinders 43 are respectively connected to two ends of the first cylinder 42 in a one-to-one correspondence. In this way, as the pressure in the first chamber and the second chamber fluctuates, the first piston 421 reciprocates, which can drive the two second cylinders 43 to spray the liquid in turn, thereby improving the cleaning efficiency.

According to another aspect of the present invention, a cleaning machine is provided, the cleaning machine includes a cleaning device, and the cleaning device is the above-mentioned cleaning device.

From the above description, it can be seen that the above-mentioned embodiments of the present utility model achieve the following technical effects: the present utility model adopts the common rail system 4, so that the compressed gas generated by the air pump 1 drives the liquid flow in the common rail system 4, The flow rate of the liquid is increased, and the compressed gas and the liquid are sprayed from the spray device 6 respectively, and the light-transmitting surface of the sensor is washed and cleaned, and a better cleaning effect can be achieved without using a high-power high-pressure pump, which solves the problem of the prior art. It is difficult to realize the problem of cleaning the sensor in the vehicle environment.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (13)

1. A cleaning device, comprising:

the air pump (1), the said air pump (1) is used for producing the compressed gas;

a liquid storage cylinder (5);

the common rail system (4) is communicated with the air pump (1) and the liquid storage cylinder (5), and the common rail system (4) is further provided with a liquid outlet, so that compressed air generated by the air pump (1) enters the common rail system (4) to drive liquid entering the common rail system (4) from the liquid storage cylinder (5) to flow, and liquid in the common rail system (4) is driven by the compressed air to flow out of the liquid outlet of the common rail system (4);

the injection device (6) is communicated with an air outlet of the air pump (1) and a liquid outlet of the common rail system (4), so that compressed air generated by the air pump (1) and fluid entering the common rail system (4) from the liquid storage cylinder (5) are sprayed out of the injection device (6).

2. The cleaning device of claim 1, further comprising:

gas holder (3), be provided with import, first export, second export on gas holder (3), gas holder (3) import with air pump (1) the gas outlet intercommunication, gas holder (3) first export with injection apparatus (6) intercommunication, gas holder (3) the second export with rail system (4) intercommunication altogether, so that the compressed gas that air pump (1) produced passes through gas holder (3) are carried respectively for injection apparatus (6) with rail system (4) altogether.

3. The cleaning device according to claim 2, further comprising a pneumatic booster pump (2), wherein the pneumatic booster pump (2) is arranged between the air pump (1) and the air storage tank (3), an inlet of the pneumatic booster pump (2) is connected with the air outlet of the air pump (1), and an outlet of the pneumatic booster pump (2) is connected with the inlet of the air storage tank (3);

and a driving gas input port of the pneumatic booster pump (2) is connected with the gas outlet of the gas pump (1) so that the compressed gas generated by the gas pump (1) drives the pneumatic booster pump (2) to act.

4. The cleaning device according to claim 1, wherein the injection device (6) comprises an air knife member (61) and a spray head (62), an inlet (611) of the air knife member (61) is communicated with the air outlet of the air pump (1), and an inlet of the spray head (62) is communicated with the liquid outlet of the common rail system (4).

5. The cleaning device according to claim 2 or 3, characterized in that the injection device (6) comprises an air knife member (61) and a spray head (62), an inlet (611) of the air knife member (61) being in communication with the first outlet of the air reservoir (3), an inlet of the spray head (62) being in communication with the liquid outlet of the common rail system (4).

6. The cleaning device according to claim 4, wherein the air jet port (612) of the air knife member (61) is in a shape of a strip or a ring, and the liquid jet port of the spray head (62) is in a tapered structure.

7. The cleaning device according to claim 6, wherein an air outlet end surface of the air ejection port (612) of the air knife member (61) is disposed obliquely upward at a first predetermined angle with respect to a first predetermined horizontal plane; and/or the nozzle of the spray head (62) is positioned on the upper side of the air knife component (61) and sprays towards the upper part of the air knife component (61), and the generatrix of the lowest side of the conical structure of the liquid spraying opening of the spray head (62) is parallel to the horizontal plane.

8. The cleaning device according to claim 6 or 7, wherein the shower head (62) is provided in plurality, a plurality of the shower heads (62) are provided at intervals in the extending direction of the air nozzle (612) of the air knife member (61), or a plurality of the shower heads (62) are arranged at intervals around the air nozzle (612) of the air knife member (61).

9. The cleaning device according to claim 6 or 7, wherein the inlet (611) of the air knife member (61) is provided in plural, and plural inlets (611) are provided at intervals in the extending direction of the air jet port (612) of the air knife member (61), or plural inlets (611) are arranged at intervals around the air jet port (612) of the air knife member (61).

10. A cleaning device according to claim 6 or 7, characterized in that an air duct (613) is arranged on the air knife member (61), the air duct (613) communicating the inlet (611) and the air jet (612), the air duct (613) having a meandering channel section.

11. The cleaning device according to claim 2, characterized in that the common rail system (4) comprises:

the double-cavity air storage tank (41) comprises a first cavity and a second cavity, the first cavity and the second cavity are communicated with the second outlet of the air storage tank (3), and electromagnetic valves (44) are arranged on a connecting pipeline between an inlet of the first cavity and the air storage tank (3) and a connecting pipeline between an inlet of the second cavity and the air storage tank (3);

the cylinder structure comprises a first cylinder (42), a columnar cavity is arranged in the first cylinder (42), a first piston (421) capable of moving along the columnar cavity is installed in the first cylinder (42), two ends of the first cylinder (42) are respectively communicated with the first cavity and the second cavity, a connecting pipeline between the first cylinder (42) and the first cavity and a connecting pipeline between the first cylinder (42) and the second cavity are respectively provided with a first check valve (45), and an outlet of the first check valve (45) faces the first cylinder (42);

a second cylinder (43), a second piston (431) is arranged in the second cylinder (43), a first end of the second cylinder (43) is communicated with one end of the first cylinder (42), a connecting pipeline between the second cylinder (43) and the first cylinder (42) is provided with a second one-way valve (46), and an outlet of the second one-way valve (46) is arranged towards the second cylinder (43); the second end of the second cylinder (43) is communicated with the liquid storage cylinder (5), a connecting pipeline between the second cylinder (43) and the liquid storage cylinder (5) is provided with a pump (47) and a third one-way valve (48), the outlet of the third one-way valve (48) faces to the second cylinder (43), and the liquid outlet of the common rail system (4) is communicated with the second end of the second cylinder (43).

12. The cleaning device according to claim 11, wherein the number of the second cylinders (43) is two, and the first ends of the two second cylinders (43) are respectively connected with two ends of the first cylinder (42) in a one-to-one correspondence manner.

13. A washing machine comprising a housing and a washing device, at least part of the washing device being disposed inside the housing, the washing device being as claimed in any one of claims 1 to 12.

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