System for cleaning beverage machine through hot water and steam generated by boiler

Abstract

The invention discloses a system for cleaning a beverage machine through hot water and steam generated by a boiler, and belongs to the field of pipeline cleaning. The system comprises a beverage machine product outlet pipeline, a cleaning pipeline, a steam pipeline, a hot water pipeline, a cleaning source switching valve and the like. The cleaning pipeline is provided with a hot reverse cleaning branch pipeline, a cold reverse cleaning branch pipeline, a hot forward cleaning branch pipeline and a cold forward cleaning branch pipeline, the flow direction of a cleaning medium is controlled through a reversing valve, a shut-off valve, a one-way valve and the like, and forward and reverse cleaning of a hot and cold product main pipeline of the beverage machine can be achieved. The heating boiler provides hot water and steam for the hot water pipeline and the steam pipeline respectively, the pressure relief pipeline, the pressure metering device, the safety valve and the temperature control switch guarantee safe operation of the system, and a plurality of temperature detection units and liquid level detection units are arranged for real-time monitoring. The cleaning mode is diversified, the pipeline of the beverage machine can be effectively cleaned, and the beverage quality and pipeline sanitation are ensured.

Description

Technical Field

[0001] The invention relates to the field of pipeline cleaning, and in particular to a system for cleaning a beverage machine by using a boiler to generate hot water and steam. Background Art

[0002] In the daily use of beverage machines, pipe cleaning is extremely important. Traditional cleaning methods often have many shortcomings. Some beverage machines use a single cold water cleaning method, which has limited cleaning effects and is difficult to completely remove beverage stains, bacteria and other impurities remaining in the pipes. Long-term accumulation can easily affect the taste and quality of the beverage, and may also breed harmful microorganisms and endanger consumer health. Some cleaning methods that use chemical detergents, although they have strong cleaning power, are prone to detergent residues, which will also have an adverse effect on the quality of the beverage and may not meet food safety standards. In addition, some cleaning systems have complex structures and cumbersome operations, which increase the user's operating difficulty and equipment maintenance costs, and reduce the convenience and operating efficiency of the beverage machine. Summary of the invention

[0003] The present invention provides a system for cleaning a beverage machine by using a boiler to generate hot water and steam, in order to solve the above technical problems.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A system for cleaning a beverage machine using a boiler to generate hot water and steam, characterized in that it includes a beverage machine delivery pipeline, a cleaning pipeline 80, a steam pipeline 90, a hot water pipeline 100, and a cleaning source switching valve V11;

[0006] One end of the cleaning pipeline 80, one end of the steam pipeline 90, and one end of the hot water pipeline 100 are connected to the mouth of the cleaning source switching valve V11, and the cleaning source switching valve V11 can switch the steam pipeline 90 or the hot water pipeline 100 to be connected to the cleaning pipeline 80; the other end of the steam pipeline 90 is connected to the steam source; the other end of the hot water pipeline 100 is connected to the hot water source;

[0007] The cleaning pipeline 80 includes at least two branches, namely a hot reverse cleaning branch pipeline 81 and a cold reverse cleaning branch pipeline 82; and

[0008] The valve between the cold product main line 10 and the cold product head 20 is a two-position three-way valve, i.e., a reversing valve V06; the valve between the hot product main line 30 and the hot product head 40 is a two-position three-way valve, i.e., a reversing valve V05;

[0009] The tail end of the cold reverse cleaning branch pipeline 82, the cold product main pipeline 10, and the cold product head 20 are connected to the reversing valve V06, and the reversing valve V06 is used to switch the cold reverse cleaning branch pipeline 82 or the cold product head 20 to communicate with the cold product main pipeline 10;

[0010] A reversing valve V05 is installed between the tail end of the hot reverse cleaning branch pipeline 81, the hot product main pipeline 30, and the hot product head 40. The reversing valve V05 is used to switch the hot reverse cleaning branch pipeline 81 or the hot product head 40 to communicate with the hot product main pipeline 30;

[0011] Further, the hot reverse cleaning branch pipeline 81 and the cold reverse cleaning branch pipeline 82 are respectively installed with a shut-off valve V07 and a shut-off valve V08; the shut-off valve V07 and the shut-off valve V08 are used to open / close the hot reverse cleaning branch pipeline 81 and the cold reverse cleaning branch pipeline 82;

[0012] Furthermore, the cleaning pipeline 80 also extends into a hot forward cleaning branch pipeline 83 and a cold forward cleaning branch pipeline 84; the hot forward cleaning branch pipeline 83 and the hot and cold forward cleaning branch pipeline 84 are respectively installed with a shut-off valve V09 and a shut-off valve V10;

[0013] The hot product main line 30 is installed with a shut-off valve V01 between the liquid delivery unit P3 and the heating unit G1; the hot product main line 30 is connected with the tail end of the hot forward cleaning branch line 83 at the position of the shut-off valve V01 close to the heating unit G1;

[0014] The cold product main line 10 is installed with a shut-off valve V02 between the liquid delivery unit P2 and the reversing valve V06; the cold product main line 10 is connected with the tail end of the cold forward cleaning branch line 84 at the position where the shut-off valve V02 is close to the reversing valve V06;

[0015] Further, the hot reverse cleaning branch pipeline 81, the cold reverse cleaning branch pipeline 82, the hot forward cleaning branch pipeline 83, and the cold forward cleaning branch pipeline 84 are each individually installed with a one-way valve, and the one-way valves are respectively one-way valve Y5, one-way valve Y4, one-way valve Y3, and one-way valve Y2; the one-way valve Y5, one-way valve Y4, one-way valve Y3, and one-way valve Y2 all allow the cleaning medium in the cleaning pipeline 80 to be transported to the cold product main pipeline 10 and the hot product main pipeline 30;

[0016] Further, the shut-off valve V01 of the hot product main pipeline 30, the pipeline between the heating unit G1 and one end of the waste liquid branch heat pipeline 120 are connected; the other end of the waste liquid branch heat pipeline 120 is connected to the waste liquid pipeline 60; the waste liquid pipeline 60 is equipped with a shut-off valve V03;

[0017] The pipeline between the shut-off valve V02 and the reversing valve V06 of the cold product main pipeline 10 is connected to one end of the waste liquid branch cold pipeline 130; the other end of the waste liquid branch cold pipeline 130 is connected to the waste liquid pipeline 60; the waste liquid branch cold pipeline 130 is installed with a shut-off valve 04;

[0018] Furthermore, it also includes a heating boiler 110, the hot water pipeline 100 is connected to the liquid level below the heating boiler 110; the steam pipeline 90 is connected to the inner cavity above the liquid level of the heating boiler 110;

[0019] Further, one end of the pressure relief pipeline 140 is connected to the inner cavity above the liquid level of the heating boiler 110, and the other end of the pressure relief pipeline 140 is connected to the waste liquid pipeline 60;

[0020] The pressure relief pipeline 140 is equipped with a pressure metering device PG1 and a safety valve R1; the pressure metering device PG1 is used to detect the pressure in the inner cavity of the pressure relief pipeline 140 / heating boiler 110; the safety valve R1 is used to maintain the pressure in the boiler within a safe range;

[0021] Furthermore, the heating boiler 110 is an electric heating boiler, and the temperature control switch KC1 is installed on the power supply line of the electric heating boiler; the temperature sensing part of the temperature control switch KC1 contacts the outer wall of the heating boiler 110;

[0022] When the outer wall temperature of the heating boiler 110 exceeds the set temperature, the temperature control switch KC1 automatically cuts off the power to prevent overheating;

[0023] Furthermore, the temperature detection unit T1 is used to detect the temperature in the heating boiler 110 ; the temperature detection unit T3 is used to detect the temperature of the cleaning medium in the cleaning pipeline 80 ; and the temperature detection unit T2 is used to detect the temperature of the beverage in the hot product main pipeline 30 .

[0024] The beneficial effects of the present invention are:

[0025] During the cleaning process, keep the hot product main line 30 and the cold product main line 10 open. The cleaning source switching valve V11 selects steam or hot water cleaning medium, and the reversing valve V05 and the reversing valve V06 connect the hot reverse cleaning branch line 81 and the cold reverse cleaning branch line 82 to the hot product main line 30 and the cold product main line 10 respectively; the cleaning medium enters the reversing valve V05 and the reversing valve V06 from the cleaning line 80, and then enters the raw material box through the cold product main line 10 and the hot product main line 30; this cleaning method is to clean the entire cold product main line 10 and the hot product main line 30 in reverse; the cleaning method with steam as the medium can empty the cold product main line 10 and the hot product main line 30. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Reference table of reference numerals:

[0028] Cold product main line 10, cold product head 20, hot product main line 30, hot product head 40, drain tank 50, waste liquid pipeline 60, waste liquid treatment unit 70;

[0029] Cleaning pipeline 80, hot reverse cleaning branch pipeline 81, cold reverse cleaning branch pipeline 82, hot forward cleaning branch pipeline 83, cold forward cleaning branch pipeline 84;

[0030] Steam pipeline 90, hot water pipeline 100, heating boiler 110, waste liquid branch hot pipeline 120, waste liquid branch cold pipeline 130, pressure relief pipeline 140;

[0031] Shut-off valve V01, shut-off valve V02, shut-off valve V03, shut-off valve 04, reversing valve V05, reversing valve V06, shut-off valve V07, shut-off valve V08, shut-off valve V09, shut-off valve V10; liquid conveying unit P2, liquid conveying unit P3; heating unit G1;

[0032] Pressure measuring equipment PG1, safety valve R1. DETAILED DESCRIPTION

[0033] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, wherein the same components are represented by the same reference numerals.

[0034] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0035] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] First, the beverage machine product pipeline is introduced. The beverage machine product pipeline includes a cold product head 20, a cold product main pipeline 10, a hot product head 40, a hot product main pipeline 30, a drain tank 50, a waste liquid pipeline 60, a waste liquid treatment unit 70, a raw material box, and a liquid conveying unit; wherein, the discharge end of the cold product main pipeline 10 is directly or indirectly connected to the cold product head 20, for example, a valve is installed between the above two. The discharge end of the hot product main pipeline 30 is directly or indirectly connected to the hot product head 40, and a heating unit G1 is installed on the hot product main pipeline 30, and the heating unit G1 is used to heat the liquid raw material conveyed by the hot product main pipeline 30, for example, a valve is installed between the above two. The raw material box is used to contain raw materials, and the feed end of the cold product main pipeline 10 and the feed end of the hot product main pipeline 30 are connected to the raw material box. The liquid delivery unit P2 / P3 is installed on the cold product main line 10 and the hot product main line 30, and the liquid delivery unit is used to deliver liquid. The hot product main line 30 is used to output hot drinks, and the cold product main line 10 is used to output cold drinks. Further, in order to maintain the quality of the beverage, a refrigerated space is also constructed, and the raw material box is placed therein. In addition, there are two raw material boxes, namely the first milk box 1 and the second milk box 2, and the feed end of the cold product main line 10 and the feed end of the hot product main line 30 are connected to the second milk box 2 and the first milk box 1 respectively. Further, the drain tank 50 is located directly below the cold product head 20 and the hot product head 40, and the drain tank 50 is used to receive the liquid dripping from the cold product head 20 and the hot product head 40. The waste liquid treatment unit 70 is a container or drainage pipe for recovering waste liquid. One end of the waste liquid pipeline 60 is communicated with the liquid discharge port of the drain tank 50 , and the other end of the waste liquid pipeline 60 extends into the waste liquid treatment unit 70 .

[0037] In order to keep the pipelines clean, they need to be cleaned regularly. Currently, the cleaning direction is divided into forward and reverse directions; the forward direction is the same as the product delivery direction, and the reverse direction is opposite to the product delivery direction.

[0038] Embodiment 1

[0039] Referring to the attached drawings, a system for cleaning a beverage machine using a boiler to generate hot water and steam includes a cleaning pipeline 80, a steam pipeline 90, a hot water pipeline 100, and a cleaning source switching valve V11;

[0040] One end of the cleaning pipeline 80, one end of the steam pipeline 90, and one end of the hot water pipeline 100 are connected to the mouth of the cleaning source switching valve V11, and the cleaning source switching valve V11 can switch the steam pipeline 90 or the hot water pipeline 100 to be connected to the cleaning pipeline 80; the other end of the steam pipeline 90 is connected to the steam source; the other end of the hot water pipeline 100 is connected to the hot water source.

[0041] The cleaning pipeline 80 includes at least two branches, namely a hot reverse cleaning branch pipeline 81 and a cold reverse cleaning branch pipeline 82. And,

[0042] The valve between the cold product main line 10 and the cold product head 20 is a two-position three-way valve, namely, a reversing valve V06; the valve between the hot product main line 30 and the hot product head 40 is a two-position three-way valve, namely, a reversing valve V05.

[0043] The tail end of the cold reverse cleaning branch pipeline 82 , the cold product main pipeline 10 , and the cold product head 20 are connected to the reversing valve V06 , and the reversing valve V06 is used to switch the cold reverse cleaning branch pipeline 82 or the cold product head 20 to be connected to the cold product main pipeline 10 .

[0044] A reversing valve V05 is installed between the tail end of the thermal reverse cleaning branch pipeline 81, the hot product main pipeline 30 and the hot product head 40. The reversing valve V05 is used to switch the thermal reverse cleaning branch pipeline 81 or the hot product head 40 to communicate with the hot product main pipeline 30.

[0045] In summary, during the cleaning process, the hot product main line 30 and the cold product main line 10 need to be kept open. The cleaning source switching valve V11 selects steam or hot water cleaning medium, and the reversing valve V05 and the reversing valve V06 connect the hot reverse cleaning branch line 81 and the cold reverse cleaning branch line 82 to the hot product main line 30 and the cold product main line 10 respectively; the cleaning medium enters the reversing valve V05 and the reversing valve V06 from the cleaning line 80, and then enters the raw material box through the cold product main line 10 and the hot product main line 30; this cleaning method is to clean the entire cold product main line 10 and the hot product main line 30 in reverse; the cleaning method with steam as the medium can empty the cold product main line 10 and the hot product main line 30.

[0046] Further, the hot reverse cleaning branch pipeline 81 and the cold reverse cleaning branch pipeline 82 are respectively installed with a shut-off valve V07 and a shut-off valve V08; the shut-off valve V07 and the shut-off valve V08 are used to open / close the hot reverse cleaning branch pipeline 81 and the cold reverse cleaning branch pipeline 82. The cold product main pipeline 10 or the hot product main pipeline 30 can be selected for cleaning.

[0047] Furthermore, the cleaning pipeline 80 also extends into a hot forward cleaning branch pipeline 83 and a cold forward cleaning branch pipeline 84; the hot forward cleaning branch pipeline 83 and the hot and cold forward cleaning branch pipeline 84 are respectively installed with a shut-off valve V09 and a shut-off valve V10.

[0048] The hot product main line 30 is installed with a shutoff valve V01 between the liquid delivery unit P3 and the heating unit G1; the hot product main line 30 is connected to the tail end of the hot forward cleaning branch line 83 at the position where the shutoff valve V01 is close to the heating unit G1.

[0049] The cold product main line 10 is installed with a shut-off valve V02 between the liquid delivery unit P2 and the reversing valve V06; the cold product main line 10 is connected with the tail end of the cold forward cleaning branch line 84 at the position where the shut-off valve V02 is close to the reversing valve V06.

[0050] In summary, the cold product head 20 and the hot product head 40 are connected to the cold product main line 10 and the hot product main line 30 through the reversing valve V05 and the reversing valve V06; the shut-off valve V01 and the shut-off valve V02 are closed. The cleaning medium enters the hot product main line 30 and the cold product main line 10 through the hot forward cleaning branch line 83 and the cold forward cleaning branch line 84, and then the cleaning medium comes out from the hot product head 40 and the cold product head 20; the cold product main line 10 and the hot product main line 30 are partially cleaned in the forward direction.

[0051] Furthermore, one-way valves are individually installed on the hot reverse cleaning branch pipeline 81, the cold reverse cleaning branch pipeline 82, the hot forward cleaning branch pipeline 83, and the cold forward cleaning branch pipeline 84, and the one-way valves are one-way valve Y5, one-way valve Y4, one-way valve Y3, and one-way valve Y2 respectively; the one-way valve Y5, one-way valve Y4, one-way valve Y3, and one-way valve Y2 all allow the cleaning medium in the cleaning pipeline 80 to be transported to the cold product main pipeline 10 and the hot product main pipeline 30.

[0052] Furthermore, the shut-off valve V01 of the hot product main pipeline 30 and the pipeline between the heating unit G1 are connected to one end of the waste liquid branch heat pipeline 120; the other end of the waste liquid branch heat pipeline 120 is connected to the waste liquid pipeline 60; and the waste liquid pipeline 60 is installed with a shut-off valve V03.

[0053] The pipeline between the shut-off valve V02 and the reversing valve V06 of the cold product main pipeline 10 is connected to one end of the waste liquid branch cold pipeline 130; the other end of the waste liquid branch cold pipeline 130 is connected to the waste liquid pipeline 60; the waste liquid branch cold pipeline 130 is installed with a shut-off valve 04.

[0054] In summary, the shut-off valves V01 and V02 are closed, and the shut-off valves V03 and V04 are opened; the cleaning source switching valve V11 selects steam or hot water cleaning medium, and the reversing valves V05 and V06 connect the hot reverse cleaning branch pipeline 81 and the cold reverse cleaning branch pipeline 82 to the hot product main pipeline 30 and the cold product main pipeline 10 respectively; the cleaning medium enters the reversing valves V05 and V06 from the cleaning pipeline 80, and then passes through the cold product main pipeline 10 and the hot product main pipeline 30 to directly enter the waste liquid branch hot pipeline 120 and the waste liquid branch cold pipeline 130, and finally enters the waste liquid pipeline 60.

[0055] Furthermore, it also includes a heating boiler 110, the hot water pipeline 100 is connected to the heating boiler 110 below the liquid level; the steam pipeline 90 is connected to the inner cavity of the heating boiler 110 above the liquid level.

[0056] Furthermore, one end of the pressure relief pipeline 140 is communicated with the inner cavity above the liquid level of the heating boiler 110 , and the other end of the pressure relief pipeline 140 is communicated with the waste liquid pipeline 60 .

[0057] The pressure relief pipeline 140 is installed with a pressure metering device PG1 and a safety valve R1; the pressure metering device PG1 is used to detect the pressure in the inner cavity of the pressure relief pipeline 140 / heating boiler 110; the safety valve R1 is used to maintain the pressure in the boiler within a safe range.

[0058] Furthermore, the heating boiler 110 is an electric heating boiler, and the temperature control switch KC1 is installed on the power supply line of the electric heating boiler; the temperature sensing part of the temperature control switch KC1 contacts the outer wall of the heating boiler 110 .

[0059] After the outer wall temperature of the heating boiler 110 exceeds the set temperature, the temperature control switch KC1 automatically cuts off the power to prevent overheating.

[0060] Furthermore, the liquid level detection unit LL1\LL2 is installed on the heating boiler 110; the detection part of the liquid level detection unit LL1\LL2 penetrates into the inner cavity of the heating boiler 110; the liquid level detection unit LL1\LL2 is used to detect the lowest and highest liquid levels of the heating boiler 110 respectively.

[0061] Furthermore, the temperature detection unit T1 is used to detect the temperature in the heating boiler 110 ; the temperature detection unit T3 is used to detect the temperature of the cleaning medium in the cleaning pipeline 80 ; and the temperature detection unit T2 is used to detect the temperature of the beverage in the hot product main pipeline 30 .

[0062] Furthermore, a cleaning medium supply pipeline is also included, which is used to replenish the cleaning medium into the heat boiler 110.

[0063] The two ends of the cleaning medium supply pipeline are respectively connected to the cold water tank and the inner cavity of the hot boiler 110; the cleaning medium supply pipeline is installed with a filter F1, a water pump P1, and a one-way valve Y1.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A system for cleaning a beverage machine using a boiler to generate hot water and steam, characterized in that: It includes a beverage machine dispensing pipeline, a cleaning pipeline (80), a steam pipeline (90), a hot water pipeline (100), and a cleaning source switching valve (V11); One end of the cleaning pipeline (80), one end of the steam pipeline (90), and one end of the hot water pipeline (100) are connected to the mouth of the cleaning source switching valve (V11), and the cleaning source switching valve (V11) can switch the steam pipeline (90) or the hot water pipeline (100) to be connected to the cleaning pipeline (80); the other end of the steam pipeline (90) is connected to the steam source; and the other end of the hot water pipeline (100) is connected to the hot water source; Wherein, the cleaning pipeline (80) comprises at least two branches, namely a hot reverse cleaning branch pipeline (81) and a cold reverse cleaning branch pipeline (82); and, The valve between the cold product main line (10) and the cold product head (20) is a two-position three-way valve, i.e., a reversing valve (V06); the valve between the hot product main line (30) and the hot product head (40) is a two-position three-way valve, i.e., a reversing valve (V05); The tail end of the cold reverse cleaning branch pipeline (82), the cold product main pipeline (10), and the cold product head (20) are connected to a reversing valve (V06), and the reversing valve (V06) is used to switch the cold reverse cleaning branch pipeline (82) or the cold product head (20) to be connected to the cold product main pipeline (10); A reversing valve (V05) is installed between the tail end of the thermal reverse cleaning branch pipeline (81), the hot product main pipeline (30) and the hot product head (40), and the reversing valve (V05) is used to switch the thermal reverse cleaning branch pipeline (81) or the hot product head (40) to be connected with the hot product main pipeline (30).

2. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 1, characterized in that: The hot reverse cleaning branch pipeline (81) and the cold reverse cleaning branch pipeline (82) are respectively installed with a shut-off valve (V07) and a shut-off valve (V08); the shut-off valve (V07) and the shut-off valve (V08) are used to open / close the hot reverse cleaning branch pipeline (81) and the cold reverse cleaning branch pipeline (82).

3. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 2, characterized in that: The cleaning pipeline (80) further extends into a hot forward cleaning branch pipeline (83) and a cold forward cleaning branch pipeline (84); the hot forward cleaning branch pipeline (83) and the hot and cold forward cleaning branch pipeline (84) are respectively installed with a shut-off valve (V09) and a shut-off valve (V10); The hot product main pipeline (30) is provided with a shutoff valve (V01) between the liquid delivery unit (P3) and the heating unit (G1); the hot product main pipeline (30) is connected to the tail end of the hot forward cleaning branch pipeline (83) at a position where the shutoff valve (V01) is close to the heating unit (G1); The cold product main line (10) is provided with a shut-off valve (V02) between the liquid delivery unit (P2) and the reversing valve (V06); the cold product main line (10) is connected to the tail end of the cold forward cleaning branch line (84) at a position where the shut-off valve (V02) is close to the reversing valve (V06).

4. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 3, characterized in that: One-way valves are individually installed on the hot reverse cleaning branch pipeline (81), the cold reverse cleaning branch pipeline (82), the hot forward cleaning branch pipeline (83), and the cold forward cleaning branch pipeline (84), and the one-way valves are respectively a one-way valve (Y5), a one-way valve (Y4), a one-way valve (Y3), and a one-way valve (Y2); the one-way valve (Y5), the one-way valve (Y4), the one-way valve (Y3), and the one-way valve (Y2) all allow the cleaning medium in the cleaning pipeline (80) to be transported to the cold product main pipeline (10) and the hot product main pipeline (30).

5. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 4, characterized in that: The shutoff valve (V01) of the hot product main pipeline (30) and the pipeline between the heating unit (G1) are connected to one end of the waste liquid branch hot pipeline (120); the other end of the waste liquid branch hot pipeline (120) is connected to the waste liquid pipeline (60); the waste liquid pipeline (60) is equipped with a shutoff valve (V03); The pipeline between the shutoff valve (V02) and the reversing valve (V06) of the cold product main pipeline (10) is connected to one end of the waste liquid branch cold pipeline (130); the other end of the waste liquid branch cold pipeline (130) is connected to the waste liquid pipeline (60); and the shutoff valve (04) is installed in the waste liquid branch cold pipeline (130).

6. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 1, characterized in that: It also includes a heating boiler (110), wherein the hot water pipeline (100) is connected to the heating boiler (110) below the liquid level; and the steam pipeline (90) is connected to the inner cavity of the heating boiler (110) above the liquid level.

7. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 6, characterized in that: One end of the pressure relief pipeline (140) is in communication with the inner cavity above the liquid level of the heating boiler (110), and the other end of the pressure relief pipeline (140) is in communication with the waste liquid pipeline (60); A pressure metering device (PG1) and a safety valve (R1) are installed on the pressure relief pipeline (140); the pressure metering device (PG1) is used to detect the pressure in the inner cavity of the pressure relief pipeline (140) / heating boiler (110); and the safety valve (R1) is used to maintain the pressure in the boiler within a safe range.

8. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 7, characterized in that: The heating boiler (110) is an electric heating boiler, and the temperature control switch (KC1) is installed on the power supply line of the electric heating boiler; the temperature sensing part of the temperature control switch (KC1) contacts the outer wall of the heating boiler (110); When the outer wall temperature of the heating boiler (110) exceeds the set temperature, the temperature control switch (KC1) automatically cuts off the power to prevent overheating.

9. The system for cleaning a beverage machine using a boiler to generate hot water and steam according to claim 8, characterized in that: The temperature detection unit (T1) is used to detect the temperature in the heating boiler (110); the temperature detection unit (T3) is used to detect the temperature of the cleaning medium in the cleaning pipeline (80); and the temperature detection unit (T2) is used to detect the temperature of the beverage in the hot product main pipeline (30).

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