Flushing system

Abstract

The utility model discloses a flushing system which comprises a first raw material box, a first liquid supply pipeline, a second raw material box, a second liquid supply pipeline, a lead-in pipeline, a lead-out pipeline and a cleaning connector. The first liquid supply pipeline is communicated with the first raw material box in a switchable mode. And the second liquid supply pipeline is communicated with the second raw material box in a switchable manner. The leading-in pipeline is communicated with the first liquid supply pipeline in a switchable mode. The leading-out pipeline is communicated with the second liquid supply pipeline in a switchable mode. The cleaning connector is detachably connected with the first liquid supply pipeline and the second liquid supply pipeline. When the cleaning connector is connected with the first liquid supply pipeline and the second liquid supply pipeline, the leading-in pipeline is communicated with the first liquid supply pipeline, and the leading-out pipeline is communicated with the second liquid supply pipeline, liquid flowing in from the leading-in pipeline can flow out from the leading-out pipeline after sequentially passing through the first liquid supply pipeline, the cleaning connector and the second liquid supply pipeline. The flushing system has the advantages that the structure is simple, the operation steps of operators are reduced, the use amount of cleaning liquid is reduced, and the like.

Description

Technical Field

[0001] The utility model relates to a flushing system. Background Art

[0002] The liquid supply system (e.g., the tea drink machine in a milk tea shop) needs to be cleaned regularly. When cleaning the existing liquid supply system, the raw material liquid (e.g., syrup) in the raw material box needs to be poured out and replaced with cleaning liquid to clean the pipeline. This cleaning method has poor efficiency, and the operator needs to perform many operation steps (e.g., pouring out the raw material liquid and receiving the cleaning liquid). Summary of the Utility Model

[0003] The utility model aims to solve the above problems, and thus provides a flushing system, which includes at least a pair of liquid outlet devices, an inlet pipeline, an outlet pipeline, and a cleaning joint. Each pair of liquid outlet devices includes a first raw material box, a first liquid supply pipeline, a second raw material box, and a second liquid supply pipeline. The first liquid supply pipeline is switchably connected to the first raw material box, so that the liquid in the first raw material box can flow out through the first liquid supply pipeline. The second liquid supply pipeline is switchably connected to the second raw material box, so that the liquid in the second raw material box can flow out through the second liquid supply pipeline. The inlet pipeline is switchably connected to the first liquid supply pipeline. The outlet pipeline is switchably connected to the second liquid supply pipeline. The cleaning joint is detachably connected to the first liquid supply pipeline and the second liquid supply pipeline. When the cleaning joint connects the first liquid supply pipeline and the second liquid supply pipeline, the inlet pipeline is connected to the first liquid supply pipeline, and the outlet pipeline is connected to the second liquid supply pipeline, the liquid flowing in from the inlet pipeline can flow out from the outlet pipeline after passing through the first liquid supply pipeline, the cleaning joint, and the second liquid supply pipeline in sequence, thereby cleaning the first liquid supply pipeline and the second liquid supply pipeline.

[0004] Furthermore, the flushing system further includes a first switching valve and a second switching valve. The first switching valve can realize that the first liquid supply pipeline is switchably connected to the first raw material box, and can also realize that the inlet pipeline is switchably connected to the first liquid supply pipeline, so as to be able to select whether the first raw material box or the inlet pipeline is connected to the first liquid supply pipeline. The second switching valve can realize that the second raw material box is switchably connected to the second liquid supply pipeline, and can also realize that the outlet pipeline is switchably connected to the second liquid supply pipeline, so as to be able to select whether the second raw material box or the outlet pipeline is connected to the second liquid supply pipeline.

[0005] Further, the flushing system further includes a disinfected water box, which is connected to the introduction pipeline in a switchable manner, so that the liquid in the disinfected water box can flow out from the lead-out pipeline after passing through the introduction pipeline, the first liquid supply pipeline, the cleaning joint and the second liquid supply pipeline, thereby cleaning the first liquid supply pipeline and the second liquid supply pipeline.

[0006] Further, the flushing system further includes a cleaning water pipe, which is connected to the introduction pipeline in a switchable manner, so that the liquid in the cleaning water pipe can flow out from the lead-out pipeline after passing through the introduction pipeline, the first liquid supply pipeline, the cleaning joint and the second liquid supply pipeline, thereby cleaning the first liquid supply pipeline and the second liquid supply pipeline.

[0007] Further, the flushing system further includes a first on-off valve and a second on-off valve. The first on-off valve can realize the switchable connection between the disinfected water box and the introduction pipeline. The second on-off valve can realize the switchable connection between the cleaning water pipe and the introduction pipeline.

[0008] Further, the flushing system further includes a main water supply pipe, which connects the disinfected water box and the cleaning water pipe. The first on-off valve and the second on-off valve are arranged on the main water supply pipe, and the introduction pipeline is connected to the main water supply pipe between the first on-off valve and the second on-off valve.

[0009] Further, each pair of liquid outlet devices further includes a first pump and a second pump. The first pump is arranged on the first liquid supply pipeline and downstream of the first switching valve. The second pump is arranged on the second liquid supply pipeline and downstream of the second switching valve.

[0010] Further, the flushing system has a normal mode. When the flushing system is in the normal mode, the cleaning joint does not connect the first liquid supply pipeline and the second liquid supply pipeline. The first liquid supply pipeline communicates with the first raw material box, and the introduction pipeline is disconnected from the first liquid supply pipeline, so that the liquid in the first raw material box flows out through the first liquid supply pipeline. And the second liquid supply pipeline communicates with the second raw material box, and the lead-out pipeline is disconnected from the second liquid supply pipeline, so that the liquid in the second raw material box flows out through the second liquid supply pipeline.

[0011] Further, the flushing system has a first cleaning mode. When the flushing system is in the first cleaning mode, the cleaning connector connects the first liquid supply line and the second liquid supply line. The first liquid supply line is disconnected from the first raw material cartridge, the second liquid supply line is disconnected from the second raw material cartridge, the cleaning water pipe is disconnected from the introduction line, the disinfection water cartridge is communicated with the introduction line, the introduction line is communicated with the first liquid supply line, and the discharge line is communicated with the second liquid supply line, so that the liquid in the disinfection water cartridge can flow out from the discharge line after passing through the introduction line, the first liquid supply line, the cleaning connector and the second liquid supply line in sequence.

[0012] Further, the flushing system has a second cleaning mode. When the flushing system is in the second cleaning mode, the cleaning connector connects the first liquid supply line and the second liquid supply line. The first liquid supply line is disconnected from the first raw material cartridge, the second liquid supply line is disconnected from the second raw material cartridge, the disinfection water cartridge is disconnected from the introduction line, the cleaning water pipe is communicated with the introduction line, the introduction line is communicated with the first liquid supply line, and the discharge line is communicated with the second liquid supply line, so that the liquid in the cleaning water pipe can flow out from the discharge line after passing through the introduction line, the first liquid supply line, the cleaning connector and the second liquid supply line in sequence.

[0013] The flushing system of the present utility model has at least the following advantages:

[0014] First, the structure of the flushing system of the present utility model is simple. During cleaning, the operator only needs to install the cleaning connector, reducing the operation steps of the operator.

[0015] Second, the flushing system of the present utility model can clean the pipelines in units of "pairs", thereby reducing the consumption of cleaning liquids (such as disinfectant solution and clean water).

[0016] The concept, specific structure and technical effects of the present utility model will be further described below in conjunction with the drawings to fully understand the purpose, features and effects of the present utility model. Description of the Drawings

[0017] Figure 1 is a system diagram of the first embodiment of the flushing system of the present utility model;

[0018] Figure 2 is a system diagram of the second embodiment of the flushing system of the present utility model.

[0019] Explanation of the reference numerals in the drawings:

[0020] Cleaning connector 10, first raw material box 21, first liquid supply pipeline 31, second raw material box 22, second liquid supply pipeline 32, introduction pipeline 41, extraction pipeline 42, total water supply pipe 43, total water return pipe 44, disinfection water box 51, cleaning water pipe 52, first switching valve 61, second switching valve 62, first on-off valve 63, second on-off valve 64, first pump 71 and second pump 72. Detailed implementation mode

[0021] The following uses specific specific examples to illustrate the implementation modes of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0022] It should be understood that although terms indicating directions, such as "upper", "lower", "left", "right", "front", "rear", etc., are used in the present invention to describe various exemplary structural parts and elements in the present invention, these terms are only used for the convenience of description, and these terms are determined based on the exemplary orientations shown in the drawings. 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.

[0023] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components during actual implementation. The types, quantities, and proportions of the components during actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0024] For the purpose of illustration, some exemplary embodiments of the present invention are described. It should be understood that the present invention can be implemented in other ways not specifically shown in the drawings.

[0025] Such as Figure 1As shown in the figure, the flushing system of the present utility model includes at least a pair of liquid discharging devices. Each pair of liquid discharging devices includes a first raw material box 21, a first liquid supply pipeline 31, a second raw material box 22, and a second liquid supply pipeline 32. The first raw material box 21 is used to hold the first liquid. The second raw material box 22 is used to hold the second liquid. The first liquid supply pipeline 31 is switchably connected to the first raw material box 21. When the first liquid supply pipeline 31 is connected to the first raw material box 21, the first liquid in the first raw material box 21 flows out through the first liquid supply pipeline 31. The second liquid supply pipeline 32 is switchably connected to the second raw material box 22. When the second liquid supply pipeline 32 is connected to the second raw material box 22, the second liquid in the second raw material box 22 flows out through the second liquid supply pipeline 32.

[0026] As Figure 1 shown in the figure, the flushing system of the present utility model further includes an introducing pipeline 41, a leading-out pipeline 42, and a cleaning joint 10. The introducing pipeline 41 is used to be connected to a cleaning liquid (for example, disinfectant solution, clear water). The introducing pipeline 41 is switchably connected to the first liquid supply pipeline 31. The leading-out pipeline 42 is switchably connected to the second liquid supply pipeline 32. The cleaning joint 10 is detachably connected to the first liquid supply pipeline 31 and the second liquid supply pipeline 32. When the cleaning joint 10 connects the first liquid supply pipeline 31 and the second liquid supply pipeline 32, the introducing pipeline 41 is connected to the first liquid supply pipeline 31, and the leading-out pipeline 42 is connected to the second liquid supply pipeline 32, the liquid flowing in from the introducing pipeline 41 (for example, disinfectant solution, clear water) can flow through the first liquid supply pipeline 31, the cleaning joint 10, and the second liquid supply pipeline 32 in sequence, so as to disinfect / clean the two liquid supply pipelines at one time.

[0027] As Figure 1 shown in the figure, the flushing system of the present utility model further includes a disinfectant water box 51. The disinfectant water box 51 is connected to the introducing pipeline 41 in a switchable manner, so that the liquid (for example, disinfectant solution) in the disinfectant water box 51 can flow through the introducing pipeline 41, the first liquid supply pipeline 31, the cleaning joint 10, and the second liquid supply pipeline 32 in sequence and then flow out from the leading-out pipeline 42, so as to disinfect the two liquid supply pipelines at one time.

[0028] As Figure 1 shown in the figure, the flushing system of the present utility model further includes a cleaning water pipe 52. The cleaning water pipe 52 is connected to the introducing pipeline 41 in a switchable manner, so that the liquid (for example, clear water) in the cleaning water pipe 52 can flow through the introducing pipeline 41, the first liquid supply pipeline 31, the cleaning joint 10, and the second liquid supply pipeline 32 in sequence and then flow out from the leading-out pipeline 42, so as to clean the two liquid supply pipelines at one time.

[0029] As Figure 1As shown in the figure, the flushing system of the present utility model further includes a first switching valve 61 and a second switching valve 62. The first switching valve 61 can enable the first raw material box 21 to be switchably communicated with the first liquid supply pipeline 31, and enable the introduction pipeline 41 to be switchably communicated with the first liquid supply pipeline 31, so as to be able to select the first raw material box 21 or the introduction pipeline 41 to be communicated with the first liquid supply pipeline 31. The second switching valve 62 can enable the second raw material box 22 to be switchably communicated with the second liquid supply pipeline 32, and enable the extraction pipeline 42 to be switchably communicated with the second liquid supply pipeline 32, so as to be able to select the second raw material box 22 or the extraction pipeline 42 to be communicated with the second liquid supply pipeline 32. In the present utility model, the first switching valve 61 and the second switching valve 62 are three-way valves, but any valve or combination of valves that can achieve the above functions of the first switching valve 61 and the second switching valve 62 is within the protection scope of the present utility model. The first switching valve 61 and the second switching valve 62 are solenoid valves.

[0030] As Figure 1 shown in the figure, each pair of liquid outlet devices of the flushing system of the present utility model further includes a first pump 71 and a second pump 72. The first pump 71 is arranged on the first liquid supply pipeline 31 and downstream of the first switching valve 61, so that the liquid in the first raw material box 21, the disinfection water box 51 or the cleaning water pipe 52 can all flow through the first pump 71. The second pump 72 is arranged on the second liquid supply pipeline 32 and downstream of the second switching valve 62, so that the liquid in the first raw material box 21, the disinfection water box 51 or the cleaning water pipe 52 can all flow through the second pump 72.

[0031] As Figure 1 shown in the figure, the flushing system of the present utility model further includes a first on-off valve 63 and a second on-off valve 64. The first on-off valve 63 can enable the disinfection water box 51 to be connected to the introduction pipeline 41 in a switchable manner. The second on-off valve 64 can enable the cleaning water pipe 52 to be connected to the introduction pipeline 41 in a switchable manner. In the present utility model, the first on-off valve 63 and the second on-off valve 64 are on-off valves, but any valve or combination of valves that can achieve the above functions of the first on-off valve 63 and the second on-off valve 64 is within the protection scope of the present utility model. The first on-off valve 63 and the second on-off valve 64 are solenoid valves.

[0032] As Figure 1 shown in the figure, the flushing system of the present utility model further includes a main water supply pipe 43. The main water supply pipe 43 connects the disinfection water box 51 and the cleaning water pipe 52. The first on-off valve 63 and the second on-off valve 64 are arranged on the main water supply pipe 43, and the introduction pipeline 41 is connected to the main water supply pipe 43 between the first on-off valve 63 and the second on-off valve 64.

[0033] As Figure 1As shown in the figure, the flushing system of the present utility model has a normal mode, a first cleaning mode, and a second cleaning mode. When the flushing system is in the normal mode, the cleaning joint 10 does not connect the first liquid supply pipeline 31 and the second liquid supply pipeline 32. The first liquid supply pipeline 31 communicates with the first raw material box 21, and the introduction pipeline 41 is disconnected from the first liquid supply pipeline 31, so that the liquid in the first raw material box 21 flows out through the first liquid supply pipeline 31. And the second liquid supply pipeline 32 communicates with the second raw material box 22, and the lead-out pipeline 42 is disconnected from the second liquid supply pipeline 32, so that the liquid in the second raw material box 22 flows out through the second liquid supply pipeline 32. When the flushing system is in the first cleaning mode, the cleaning joint 10 connects the first liquid supply pipeline 31 and the second liquid supply pipeline 32. The first liquid supply pipeline 31 is disconnected from the first raw material box 21, and the second liquid supply pipeline 32 is disconnected from the second raw material box 22. The cleaning water pipe 52 is disconnected from the introduction pipeline 41, and the disinfection water box 51 communicates with the introduction pipeline 41. The introduction pipeline 41 communicates with the first liquid supply pipeline 31, and the lead-out pipeline 42 communicates with the second liquid supply pipeline 32, so that the liquid in the disinfection water box 51 can flow out from the lead-out pipeline 42 after passing through the introduction pipeline 41, the first liquid supply pipeline 31, the cleaning joint 10, and the second liquid supply pipeline 32 in sequence. When the flushing system is in the second cleaning mode, the cleaning joint 10 connects the first liquid supply pipeline 31 and the second liquid supply pipeline 32. The first liquid supply pipeline 31 is disconnected from the first raw material box 21, and the second liquid supply pipeline 32 is disconnected from the second raw material box 22. The disinfection water box 51 is disconnected from the introduction pipeline 41, and the cleaning water pipe 52 communicates with the introduction pipeline 41. The introduction pipeline 41 communicates with the first liquid supply pipeline 31, and the lead-out pipeline 42 communicates with the second liquid supply pipeline 32, so that the liquid in the cleaning water pipe 52 can flow out from the lead-out pipeline 42 after passing through the introduction pipeline 41, the first liquid supply pipeline 31, the cleaning joint 10, and the second liquid supply pipeline 32 in sequence.

[0034] As Figure 2 shown, the flushing system of the present utility model further includes a total return water pipe 44, a third on-off valve 65, and a fourth on-off valve 66. The total return water pipe 44 connects the disinfection water box 51 and the cleaning water pipe 52. The third on-off valve 65 and the fourth on-off valve 66 are arranged on the total return water pipe 44, and the lead-out pipeline 42 is connected to the total return water pipe 44 between the third on-off valve 65 and the fourth on-off valve 66. The third on-off valve 65 can connect the disinfection water box 51 to the lead-out pipeline 42 in a switchable manner. The fourth on-off valve 66 can connect the cleaning water pipe 52 to the lead-out pipeline 42 in a switchable manner. In the present utility model, the third on-off valve 65 and the fourth on-off valve 66 are on-off valves, but any valve or combination of valves that can achieve the above functions of the third on-off valve 65 and the fourth on-off valve 66 is within the protection scope of the present utility model. The third on-off valve 65 and the fourth on-off valve 66 are solenoid valves.

[0035] The introduction pipeline, the extraction pipeline, the first switching valve and the second switching valve of the flushing system of the present utility model are correspondingly arranged for each pair of liquid discharging devices.

[0036] The flushing system of the present utility model has at least the following advantages:

[0037] First, the structure of the flushing system of the present utility model is simple. During cleaning, the operator only needs to install the cleaning connector, reducing the operation steps of the operator.

[0038] Second, the flushing system of the present utility model can clean the pipelines in units of "pairs", thereby reducing the consumption of cleaning liquids (such as disinfectant solution, clean water).

[0039] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A rinsing system, characterized in that, Comprising: At least a pair of liquid discharging devices, each pair of liquid discharging devices including a first raw material box (21), a first liquid supply pipeline (31), a second raw material box (22) and a second liquid supply pipeline (32), the first liquid supply pipeline (31) being switchably communicated with the first raw material box (21) so that the liquid in the first raw material box (21) can flow out through the first liquid supply pipeline (31), and the second liquid supply pipeline (32) being switchably communicated with the second raw material box (22) so that the liquid in the second raw material box (22) can flow out through the second liquid supply pipeline (32); An introducing pipeline (41), which is switchably communicated with the first liquid supply pipeline (31); A leading-out pipeline (42), which is switchably communicated with the second liquid supply pipeline (32); and A cleaning joint (10), which is detachably connected to the first liquid supply pipeline (31) and the second liquid supply pipeline (32); When the cleaning joint (10) connects the first liquid supply pipeline (31) and the second liquid supply pipeline (32), the introducing pipeline (41) is communicated with the first liquid supply pipeline (31), and the leading-out pipeline (42) is communicated with the second liquid supply pipeline (32), the liquid flowing in from the introducing pipeline (41) can flow out from the leading-out pipeline (42) after sequentially passing through the first liquid supply pipeline (31), the cleaning joint (10) and the second liquid supply pipeline (32), so as to clean the first liquid supply pipeline (31) and the second liquid supply pipeline (32).

2. The flushing system according to claim 1, characterized in that, Further comprising: A first switching valve (61), which can realize that the first liquid supply pipeline (31) is switchably communicated with the first raw material box (21), and can realize that the introducing pipeline (41) is switchably communicated with the first liquid supply pipeline (31), so as to be able to select the first raw material box (21) or the introducing pipeline (41) to be communicated with the first liquid supply pipeline (31); and A second switching valve (62), which can realize that the second raw material box (22) is switchably communicated with the second liquid supply pipeline (32), and can realize that the leading-out pipeline (42) is switchably communicated with the second liquid supply pipeline (32), so as to be able to select the second raw material box (22) or the leading-out pipeline (42) to be communicated with the second liquid supply pipeline (32).

3. The flushing system according to claim 1, wherein, Further comprising: A disinfectant water box (51), which is connected to the introducing pipeline (41) in a switchable manner, so that the liquid in the disinfectant water box (51) can flow out from the leading-out pipeline (42) after passing through the introducing pipeline (41), the first liquid supply pipeline (31), the cleaning joint (10) and the second liquid supply pipeline (32), so as to clean the first liquid supply pipeline (31) and the second liquid supply pipeline (32).

4. The flushing system according to claim 3, characterized in that Further comprising: A cleaning water pipe (52) is connectable to and disconnectable from the introduction pipeline (41), so that the liquid in the cleaning water pipe (52) can flow out from the lead-out pipeline (42) after passing through the introduction pipeline (41), the first liquid supply pipeline (31), the cleaning connector (10) and the second liquid supply pipeline (32), thereby cleaning the first liquid supply pipeline (31) and the second liquid supply pipeline (32).

5. The flushing system according to claim 4, characterized in that, It further includes: A first on-off valve (63) capable of making the disinfectant water box (51) connectable to and disconnectable from the introduction pipeline (41); And A second on-off valve (64) capable of making the cleaning water pipe (52) connectable to and disconnectable from the introduction pipeline (41).

6. The flushing system according to claim 5, wherein It further includes: A main water supply pipe (43) connecting the disinfectant water box (51) and the cleaning water pipe (52); The first on-off valve (63) and the second on-off valve (64) are arranged on the main water supply pipe (43), and the introduction pipeline (41) is connected to the main water supply pipe (43) between the first on-off valve (63) and the second on-off valve (64).

7. The flushing system according to claim 2, wherein: Each pair of liquid outlet devices further includes a first pump (71) and a second pump (72). The first pump (71) is arranged on the first liquid supply pipeline (31) and downstream of the first switching valve (61), and the second pump (72) is arranged on the second liquid supply pipeline (32) and downstream of the second switching valve (62).

8. The flushing system according to claim 1, wherein: The flushing system has a normal mode; When the flushing system is in the normal mode, the cleaning connector (10) does not connect the first liquid supply pipeline (31) and the second liquid supply pipeline (32). The first liquid supply pipeline (31) communicates with the first raw material box (21), and the introduction pipeline (41) is disconnected from the first liquid supply pipeline (31), so that the liquid in the first raw material box (21) flows out through the first liquid supply pipeline (31). And the second liquid supply pipeline (32) communicates with the second raw material box (22), and the lead-out pipeline (42) is disconnected from the second liquid supply pipeline (32), so that the liquid in the second raw material box (22) flows out through the second liquid supply pipeline (32).

9. The flushing system according to claim 4, wherein: The flushing system has a first cleaning mode; When the flushing system is in the first cleaning mode, the cleaning joint (10) connects the first liquid supply pipeline (31) and the second liquid supply pipeline (32), the first liquid supply pipeline (31) is disconnected from the first raw material box (21), the second liquid supply pipeline (32) is disconnected from the second raw material box (22), the cleaning water pipe (52) is disconnected from the introduction pipeline (41), the disinfection water box (51) is communicated with the introduction pipeline (41), the introduction pipeline (41) is communicated with the first liquid supply pipeline (31), and the lead-out pipeline (42) is communicated with the second liquid supply pipeline (32), so that the liquid in the disinfection water box (51) can flow out from the lead-out pipeline (42) after sequentially passing through the introduction pipeline (41), the first liquid supply pipeline (31), the cleaning joint (10) and the second liquid supply pipeline (32).

10. The flushing system according to claim 4, wherein: The flushing system has a second cleaning mode; When the flushing system is in the second cleaning mode, the cleaning joint (10) connects the first liquid supply pipeline (31) and the second liquid supply pipeline (32), the first liquid supply pipeline (31) is disconnected from the first raw material box (21), the second liquid supply pipeline (32) is disconnected from the second raw material box (22), the disinfection water box (51) is disconnected from the introduction pipeline (41), the cleaning water pipe (52) is communicated with the introduction pipeline (41), the introduction pipeline (41) is communicated with the first liquid supply pipeline (31), and the lead-out pipeline (42) is communicated with the second liquid supply pipeline (32), so that the liquid in the cleaning water pipe (52) can flow out from the lead-out pipeline (42) after sequentially passing through the introduction pipeline (41), the first liquid supply pipeline (31), the cleaning joint (10) and the second liquid supply pipeline (32).

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