Liquid path system of fresh milk machine

Abstract

The invention discloses a fresh milk machine liquid path system which comprises a hot water boiler, a circulating heating boiler, a cold water tank, a heat exchanger, a cold milk tank, a hot milk tank and a steam boiler, and the cold water tank is connected with the hot water boiler, the circulating heating boiler and the steam boiler; the hot water boiler is connected with the valve V11, and the steam boiler is connected with the P end of the valve V12; the heat exchanger is provided with four interfaces, and two interfaces of the heat exchanger are respectively connected with the circulating heating boiler; the cold milk box is connected with a valve V06, the valve V06 is connected with the cold milk outlet, the hot milk box is connected with a port of one pipeline of the heat exchanger, and the other port of the pipeline of the heat exchanger is connected with a valve V05; therefore, through the synergistic effect of hot water and steam, the main product outlet pipeline system is deeply cleaned in combination with the alternating change of the forward washing direction and the back washing direction. Hot water effectively dissolves and washes away residual stains in multidirectional circulating flow, and high-temperature steam can thoroughly kill microorganisms in the pipeline, so that the purpose of efficient sterilization is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fresh milk machines, and particularly relates to a liquid path system of a fresh milk machine. BACKGROUND

[0002] In the production and processing process of the existing beverage industry, the main product path as the key channel for material conveying directly affects the product quality and safety in terms of internal cleaning degree. At present, the cleaning of the main product path mainly adopts single-direction hot water flushing or independent steam treatment.

[0003] The existing liquid path system cleaning technology of the beverage machine has obvious drawbacks. Most of the equipment relies on single-direction hot water flushing, which cannot effectively remove stubborn protein and sugar residue in the curved pipeline, forming a cleaning dead angle. At the same time, normal water washing and low-power heating lead to incomplete disinfection, making it difficult to kill heat-resistant bacteria and posing a risk of microbial contamination. In addition, there is often residual water in the pipeline after traditional cleaning, which provides conditions for microbial reproduction and affects the health and safety of subsequent beverages. Some solutions using chemical cleaning agents may cause reagent residue problems. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0005] To this end, one object of the present application is to provide a liquid path system of a fresh milk machine. The cleaning scheme combines the synergistic effect of hot water and steam and the alternating change of forward and reverse flushing directions to achieve deep cleaning of the main product pipeline system.

[0006] To achieve the above object, the first aspect of the present application provides a fresh milk machine liquid path system, comprising a hot water boiler, a circulating heating boiler, a cold water tank, a heat exchanger, a cold milk tank, a hot milk tank and a steam furnace, wherein the cold water tank is connected with the hot water boiler, the circulating heating boiler and the steam furnace respectively; the hot water boiler is connected with a valve V11, and the steam furnace is connected with a P end of a valve V12; the heat exchanger has four interfaces, two interfaces of the heat exchanger are connected with the circulating heating boiler respectively; the cold milk tank is connected with a valve V06, the valve V06 is connected with a cold milk outlet, the hot milk tank is connected with a port of one pipeline of the heat exchanger, another port of the one pipeline of the heat exchanger is connected with a valve V05, the valve V05 is connected with a hot milk outlet; the valve V11 is connected with a valve V12, a valve V07 and a valve V09 respectively, the valve V12 is also connected with the valve V07 and the valve V09; the valve V11 and the valve V12 are connected with the valve V05; the valve V11 and the valve V12 are connected with the valve V06, a valve V08 is arranged between an A end of the valve V12 and the valve V06, the valve V11 is connected with a valve V09 and a valve V10, and the valve V10 is connected with a valve V04.

[0007] The fresh milk machine liquid path system provided by the embodiment of the present application realizes deep cleaning of the main outlet pipeline system through the synergistic effect of hot water and steam and the alternate change of forward and reverse flushing directions. The hot water effectively dissolves and flushes away the residual stains in the multi-directional circulation, and the high-temperature steam can completely kill the microorganisms in the pipeline, so that the purpose of efficient disinfection is achieved.

[0008] In addition, the fresh milk machine liquid path system provided by the embodiment of the present application can have the following additional technical features:

[0009] In an embodiment of the present application, a first pipeline is arranged between the cold milk tank and the valve V06, and a cold milk raw material pumping pump P2, a pipeline liquid level sensor L2 and a valve V02 are arranged on the first pipeline in sequence along a direction from the cold milk tank to the valve V06.

[0010] In an embodiment of the present application, a second pipeline is arranged between the hot milk tank and the valve V05, and a hot milk raw material pumping pump P3, a pipeline liquid level sensor L3, a valve V01 and a heat exchanger E1 are arranged on the second pipeline in sequence along a direction from the hot milk tank to the valve V05.

[0011] In an embodiment of the present application, a tail water discharge box is arranged below the cold milk outlet and the hot milk outlet.

[0012] In an embodiment of the present application, the valve V02 is connected with the valve V04, the valve V01 is connected with the valve V03, the valve V04 and the valve V03 are both connected with the tail water tank, and the tail water tank is connected with the tail water discharge box.

[0013] In an embodiment of the present application, the water supply end of the cold water tank is sequentially connected with a filter, a pipeline liquid level sensor L1 and a valve V18.

[0014] In an embodiment of the present application, a one-way valve Y2 in the direction from V10 to V02 is arranged between the valve V02 and the valve V10; a one-way valve Y4 in the direction from V08 to V06 is arranged between the valve V06 and the valve V08; a one-way valve Y5 in the direction from V07 to V05 is arranged between the valve V05 and the valve V07; and a one-way valve Y3 in the direction from V09 to V01 is arranged between the valve V01 and the valve V09.

[0015] In an embodiment of the present application, a temperature sensor is arranged on each of the hot water boiler, the circulating hot water boiler, the steam boiler, the steam boiler exhaust port and the heat exchanger.

[0016] According to the liquid path system of the fresh milk machine of the present application, through the synergistic effect of hot water and steam, combined with the alternate change of the forward and reverse cleaning directions, the deep cleaning of the main outlet pipeline system is realized. The hot water effectively dissolves and flushes away the residual stains in the multi-directional circulation, and the high-temperature steam can completely kill the microorganisms in the pipeline, achieving the purpose of efficient disinfection. The steam can also be used to empty the residual liquid in the main pipeline, ensuring that there is no water accumulation in the pipeline after cleaning, eliminating the risk of secondary pollution and improving the hygiene and safety of the liquid path system.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 FIG. 1 is a structural schematic diagram of a liquid path system of a fresh milk machine according to the present application.

[0020] As shown in the figure: 1, hot water boiler; 2, circulating heating boiler; 3, cold water tank; 4, heat exchanger; 5, cold milk tank; 6, hot milk tank; 7, tail water tank; 8, tail water discharge box; 9, steam boiler; 10, cold milk outlet; 11, hot milk outlet; 12, first pipeline; 13, second pipeline; 17, hot water circulation module; 100, thermal module. DETAILED DESCRIPTION

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0022] The following description, in conjunction with the accompanying drawings, describes a liquid circuit system for a fresh milk machine according to an embodiment of this application.

[0023] like Figure 1 As shown in the figure, a liquid circuit system for a fresh milk machine according to an embodiment of this application includes a hot water boiler 1, a circulating heating boiler 2, a cold water tank 3, a heat exchanger 4, a cold milk tank 5, a hot milk tank 6, and a steam oven 9.

[0024] The cold water tank 3 is connected to the hot water boiler 1, the circulating heating boiler 2, and the steam boiler 9. It should be noted that the cold water tank 3 can be a container for storing purified water, or it can be replaced by a pressurized water source. A filter, a pipeline level sensor L1, and a valve V18 are sequentially connected to the water supply end of the cold water tank 3.

[0025] It should be noted that the filter F1 is used to filter water, the pipeline level sensor L1 is used to detect whether the water supply of the system is normal, and the valve V18 is the main water inlet valve of the system.

[0026] Hot water boiler 1 is connected to valve V11, and steam boiler 9 is connected to the P end of valve V12.

[0027] It should be noted that the hot water boiler 1 is used to provide hot water for system cleaning; the steam boiler 9 is a thermal heating device, including but not limited to heating plates, die-cast aluminum heating blocks, etc., used to generate high-temperature steam during cleaning.

[0028] Thus, the hot water boiler 1 and the steam boiler 9 respectively provide hot water and steam for cleaning the liquid circuit system, collectively referred to as the thermal module 100.

[0029] The heat exchanger 4 has four ports, two of which are connected to the circulating heating boiler 2.

[0030] The circulating heating boiler 2 is used to output hot water for heat exchange during beverage preparation, and the heat exchanger 4 is used to heat the milk. Therefore, the heat exchanger 4 and the circulating heating boiler 2 form a hot water circulation module 17.

[0031] It should be noted that in order to transfer hot water from the circulating heating boiler 2 to the heat exchanger 4, a circulating pump P4 can be installed between the heat exchanger 4 and the circulating heating boiler 2 to provide hot water circulation.

[0032] The cold milk tank 5 is connected with a valve V06, the valve V06 is connected with a cold milk outlet 10. The hot milk tank 6 is connected with one port of a pipeline of the heat exchanger 4, the other port of the pipeline of the heat exchanger 4 is connected with a valve V05, the valve V05 is connected with a hot milk outlet 11.

[0033] It should be noted that the cold milk tank 5 and the hot milk tank 6 are used for containing milk raw materials, wherein the raw materials include but are not limited to various liquid drinking raw materials. The rear end of the cold milk tank 5 is connected with a cold milk pipeline, and the rear end of the hot milk tank 6 is connected with a hot milk pipeline.

[0034] The valve V11 is connected with a valve V12, a valve V07 and a valve V09 respectively, and the valve V12 is also connected with the valve V07 and the valve V09.

[0035] The valve V11 and the valve V12 are both connected with the valve V05, and the valve V11 and the valve V12 are both connected with the valve V06.

[0036] It should be noted that the valve V11 is a total control valve for inputting hot water during cleaning, the valve V12 is a two-position three-way valve, and is used for realizing the reversing of the steam input valve and the steam exhaust during cleaning. The valve V05 and the valve V06 are both two-position three-way valves, and are respectively used for outputting milk at the outlet of the hot milk pipeline and the cold milk pipeline and switching the reverse cleaning.

[0037] The valve V12 is provided with a valve V08 between the A end and the valve V06, the valve V11 is connected with a valve V09 and a valve V10, and the valve V10 is connected with a valve V04.

[0038] Specifically, the valve V07 and the valve V08 are control valves for inputting hot water or steam for reverse cleaning of the hot milk pipeline and the cold milk pipeline respectively. The valve V09 and the valve V10 are control valves for inputting hot water or steam for forward cleaning of the hot milk pipeline and the cold milk pipeline respectively.

[0039] In an embodiment of the present application, a first pipeline 12 is arranged between the cold milk tank 5 and the valve V06, and the first pipeline 12 is sequentially provided with a cold milk raw material pumping pump P2, a pipeline liquid level sensor L2 and a valve V02 along the direction from the cold milk tank 5 to the valve V06. It should be noted that the first pipeline 12 is a cold milk pipeline, the pipeline liquid level sensor L2 is used for detecting the state of the cold milk pipeline raw material (how much cold milk raw material is left), and the valve V02 is a total control valve for inputting cold milk.

[0040] In an embodiment of the present application, a second pipeline 13 is arranged between the hot milk tank 6 and the valve V05, and the hot milk raw material extraction pump P3, the pipeline liquid level sensor L3, the valve V01 and the heat exchanger 4 are sequentially arranged on the second pipeline 13 in the direction from the hot milk tank 6 to the valve V05. It should be noted that the second pipeline 13 is a hot milk pipeline, the pipeline liquid level sensor L3 is used to detect the state of the hot milk raw material (how much hot milk raw material is left), and the valve V01 is a total control valve for the hot milk input.

[0041] In an embodiment of the present application, the tail water discharge box 8 is arranged below the cold milk outlet 10 and the hot milk outlet 11.

[0042] It can be understood that the tail water discharge box 8 is used to collect the tail water of the cold milk and the hot milk.

[0043] In an embodiment of the present application, the valve V02 and the valve V04 are connected, the valve V01 and the valve V03 are connected, the valve V04 and the valve V03 are both connected with the tail water tank 7, and the tail water tank 7 is connected with the tail water discharge box 8.

[0044] Among them, the tail water tank 7 is connected with a drain pipe for discharging waste liquid.

[0045] It should be noted that the valves V03 and V04 are respectively used as drain valves for reverse cleaning of the hot milk pipeline and the cold milk pipeline.

[0046] In an embodiment of the present application, a one-way valve Y2 is arranged between the valve V02 and the valve V10 in the direction from V10 to V02; a one-way valve Y4 is arranged between the valve V06 and the valve V08 in the direction from V08 to V06; a one-way valve Y5 is arranged between the valve V05 and the valve V07 in the direction from V07 to V05; and a one-way valve Y3 is arranged between the valve V01 and the valve V09 in the direction from V09 to V01.

[0047] It should be noted that the one-way valves are provided to ensure the one-way flow of liquid.

[0048] In an embodiment of the present application, temperature sensors are arranged on the hot water boiler 1, the circulating hot water boiler, the steam boiler 9, the steam boiler exhaust port and the heat exchanger 4.

[0049] It should be noted that the temperature sensor T1 on the hot water boiler 1 is used to detect the water temperature of the hot water boiler 1; the temperature sensor T2 on the circulating hot water boiler is used to detect the water temperature of the circulating hot water boiler; the temperature sensor T3 and the temperature sensor T4 on the steam boiler 9 and the steam boiler exhaust port are respectively used to detect the temperature of the steam boiler 9 and the steam output temperature; and the temperature sensor T5 on the heat exchanger 4 is used to detect the temperature of the milk after heating.

[0050] Wherein, the hot water boiler 1 is provided with a water level probe to determine the water level to prevent dry burning, the hot water outlet is arranged at the top, and the hot water boiler 1 pressure is maintained in a certain range by means of the cooperation of the pressure sensor and the electromagnetic valve, while the internal pressure is ensured in the safety interval in a physical way through the safety valve, and a temperature control switch is also arranged to cut off the heating power supply in a physical way when the temperature exceeds the limit.

[0051] The specific circuit is as follows:

[0052] a) Cold milk main circuit: cold milk tank 5→P2→L2→V02→V06→cold milk outlet 10;

[0053] After the milk flows out from the cold milk tank 5 (raw material storage container) through the cold milk raw material extraction pump P2, it flows through L2 (cold milk road raw material liquid level sensor), which detects in real time whether there is cold milk raw material in the pipeline (when there is no raw material, an alarm or shutdown can be triggered to avoid empty pump operation), then the raw material continues to flow through V02 (cold milk road 2-position 2-way on-off valve), which allows the raw material to pass when it is in the "open" state (when it is closed, the cold milk main circuit is cut off); then enters V06 (cold milk road outlet switch valve), at this time V06 is in the "milk outlet" position (not in the "reverse cleaning" position), which guides the raw material to flow to the cold milk outlet 10, and finally outputs from the cold milk outlet 10, completing the cold milk production.

[0054] b) Hot milk main circuit: hot milk tank 6→P3→L3→V01→V05→hot milk outlet 11.

[0055] After the milk flows out from the hot milk tank 6 (refrigerated raw material storage container) through P3 (hot milk raw material extraction pump), it flows through L3 (hot milk road raw material liquid level sensor), which detects whether there is raw material in the pipeline (when there is no raw material, protection is triggered to avoid empty pump), the raw material flows through V01 (hot milk road 2-position 2-way on-off valve), which allows the raw material to enter the subsequent pipeline when it is open; the raw material first enters the heat exchanger 4 and exchanges heat with the hot water below 85°C of the "hot water circulation loop", and is heated to the set temperature (T5 detects the outlet milk temperature in real time, closed loop adjustment); the heated hot milk flows through V05 (hot milk road outlet switch valve), which is in the "milk outlet" position at this time, guiding the hot milk to flow to the hot milk outlet 11; finally output from the hot milk outlet 11, completing the hot milk production.

[0056] c) Main hot water circuit: cold water tank 3→F1→V18→P1→V15→Y1→G1→V11.

[0057] The clean water flowing out from the cold water tank 3 (or a pressurized water source) is first filtered through F1 (water inlet filter);

[0058] The filtered clean water flows through V18 (the total water inlet valve of the system), and when V18 is opened, it supplies water to the entire main hot water circuit. Then the clean water is pressurized by P1 (the hot water boiler 1 water inlet pump) and delivered to the subsequent pipeline. Subsequently, it flows through V15 (the hot water boiler water inlet valve), and when V15 is opened, it allows water to enter G1. After passing through Y1 (a one-way valve to prevent hot water in G1 from flowing back to P1), it enters G1 (the hot water boiler 1), which heats the water to the required temperature for cleaning (controlled by T1 (the hot water boiler 1 water temperature detection sensor)). The heated hot water in G1 is finally output through V11 (the cleaning hot water total control valve) to provide hot water for the subsequent cleaning circuit.

[0059] d) Main steam circuit: cold water tank 3 → F1 → V18 → P7 → V14 → L4 → G3 → V12.

[0060] The clean water flowing out of the cold water tank 3 (or a pressurized water source) is filtered of impurities by F1 (the water inlet filter). The filtered clean water flows through V18 (the total water inlet valve of the system) and is pressurized by P7 (the steam boiler 9 water inlet pump) to deliver a small amount of water to V14 (the steam boiler 9 water inlet valve). When V14 is opened, it allows water to enter G3. Then, the water flows through L4 (the steam boiler 9 water supply level sensor, which detects whether the water supply is normal and stops P7 if there is a lack of water), and then enters G3 (the steam boiler 9), which rapidly heats the water to generate high-temperature steam. The high-temperature steam flows through V12 (the steam reversing valve), which is currently in the "steam input" position (not the "steam exhaust" position), to deliver the steam to the cleaning circuit for pipeline disinfection.

[0061] Among them, the steam boiler 9 controls the input water quantity by small flow pump P7 to adjust the steam output quantity, controls the furnace body temperature by T3 to realize heating control and overheating protection, and realizes closed-loop control of the steam output temperature by real-time feedback of T4.

[0062] e) Circulating boiler water inlet: cold water tank 3 → F1 → V18 → P1 → V13 → G2.

[0063] The clean water flowing out of the cold water tank 3 (or a pressurized water source) is filtered of impurities by F1 (the water inlet filter). The filtered clean water flows through V18 (the total water inlet valve of the system) and is pressurized by P1 (the circulating boiler water inlet pump) to deliver water to V13 (the circulating boiler water inlet valve), which allows water to enter G2 (the circulating boiler 2) when opened.

[0064] After entering G2, the water is heated by G2 to a set temperature below 85°C (T2 detects the water temperature in real time to control the heating start and stop), providing a heat source for the subsequent hot water circulation circuit.

[0065] f) Hot water circulation: G2 → P4 → E1 → G2.

[0066] Hot water, which has been heated to a set temperature (≤85°C) in G2 (circulating heating boiler 2), flows out of G2 under the drive of P4 (hot water circulating pump); at this time, the hot water enters E1 (heat exchanger 4) and flows through the outside of the "milk pipeline" in E1 (without directly contacting the milk), thereby transferring heat to the cold milk raw material flowing through E1; after completing heat exchange, the hot water, which has a slightly reduced temperature, flows out of E1 and returns to G2 (circulating heating boiler 2) again, and G2 heats the returned hot water to the set temperature again, thereby forming a closed loop circulation and continuously providing a heat source for heating the milk.

[0067] g) Hot milk pipeline cleaning circuit

[0068] i. Hot milk pipeline reverse cleaning front section circuit:

[0069] V11 / V12→V07→Y5→V05→E1→V03→Tail water tank 7.

[0070] Select cleaning medium: if hot water is used, open V11 (cleaning hot water master control valve); if steam is used, open V12 (steam reversing valve, in the "steam input" position), and the cleaning medium (hot water / steam) enters the pipeline;

[0071] The cleaning medium flows through V07 (hot milk pipeline reverse cleaning medium control valve, V07 is opened to allow the medium to enter the reverse cleaning path); through Y5 (one-way valve, to prevent the medium from flowing back to V11 / V12) to enter V05 (hot milk pipeline switching valve), at this time V05 is switched to the "reverse cleaning" position (not the "milk outlet" position), and then the medium flows through E1 (heat exchanger 4) to flush the residual milk stains in the milk pipeline in E1; and then flows through V03 (hot milk pipeline reverse cleaning drain valve, V03 is opened to allow waste liquid / waste steam to be discharged);

[0072] Finally, the waste liquid / waste steam enters the tail water tank 7 / sewer, and the front section reverse cleaning is completed.

[0073] ii. Hot milk pipeline reverse cleaning entire circuit:

[0074] V11 / V12→V07→Y5→V05→E1→V01→L3→P3→Hot milk tank 6.

[0075] The initial flow direction of the cleaning medium (hot water / steam) is consistent with that of the "reverse cleaning front section circuit": through V11 / V12→V07→Y5→V05→E1;

[0076] After the medium flows out of E1, it flows through V01 (hot milk path shutoff valve, V01 is opened to allow the medium to enter the raw material side pipeline); then it flows through L3 (hot milk path raw material liquid level sensor) to flush the sensor and the pipeline residue; the medium enters P3 (hot milk raw material extraction pump, P3 can be operated for a short time to assist the medium to flow through the pump body to clean the residue in the pump); finally, the medium flows into the hot milk tank 6 (to flush the residue in the raw material tank), and after cleaning is completed, the waste liquid in the tank can be discharged to the tail water tank 7.

[0077] iii. Hot milk path forward cleaning circuit:

[0078] V11 / V12→V09→Y3→E1→V05→hot milk outlet 11.

[0079] The cleaning medium (hot water / steam) enters through V11 (hot water) or V12 (steam), flows through V09 (hot milk path forward cleaning medium control valve, V09 is opened), enters E1 (heat exchanger 4) through Y3 (one-way valve to prevent medium backflow) to flush the milk pipeline in E1; after the medium flows out of E1, it enters V05 (hot milk path switching valve), at this time V05 is switched to the "milk outlet" position (consistent with the time of production, forward flow);

[0080] Finally, the medium is discharged from the hot milk outlet 11 (waste liquid is collected by the tail water discharge box 8 and then flows into the tail water tank 7, and waste steam is directly discharged or guided to the tail water tank 7), completing forward cleaning.

[0081] h) Cold milk path cleaning circuit

[0082] i. Cold milk path reverse cleaning front section circuit:

[0083] V11 / V12→V08→Y4→V06→V04→tail water tank 7.

[0084] The cleaning medium (hot water / steam) enters through V11 / V12, flows through V08 (cold milk path reverse cleaning control valve, V08 is opened), enters V06 (cold milk path switching valve, switched to the "reverse cleaning" position) through Y4 (one-way valve); after the medium flows through V06, it enters V04 (cold milk path reverse cleaning exhaust valve, V04 is opened), and finally is discharged into the tail water tank 7 / sewer, completing the front section cleaning.

[0085] ii. Cold milk path reverse cleaning entire circuit:

[0086] V11 / V12→V08→Y4→V06→V02→L1→P2→cold milk tank 5.

[0087] The cleaning medium enters through V11 / V12→V08→Y4→V06 (reverse cleaning position), which is consistent with the front section path;

[0088] After the medium flows out from V06, it flows through V02 (cold milk road cut-off valve, V02 is opened), flows through L1 (system water supply detection sensor, which is a cold milk road cleaning detection point, assisting in confirming medium flow), enters P2 (cold milk raw material extraction pump, short-term operation to clean the pump body), and finally flows into the cold milk tank 5, completing the full-path cleaning.

[0089] iii. Cold milk road forward cleaning circuit:

[0090] V11 / V12→V10→Y2→V06→cold milk outlet 10.

[0091] The cleaning medium enters through V11 / V12, flows through V10 (cold milk road forward cleaning control valve, V10 is opened);

[0092] enters V06 (cold milk road switching valve, switched to the "milk outlet" position, flows forward) through Y2 (one-way valve); and finally is discharged from the cold milk outlet 10 (waste liquid is collected by the tail water discharge box 8 and then flows into the tail water tank 7), completing the forward cleaning.

[0093] In summary, the fresh milk machine liquid circuit system of the embodiment of the application, through the synergistic effect of hot water and steam, through the combination of steam, hot water and different directions, the main outlet road is cleaned, the cleaning of all pipelines is realized, there is no cleaning dead angle, the stains in the pipeline are removed through hot water flushing, the pipeline is disinfected through steam, and the main outlet pipeline system is deeply cleaned. The hot water effectively dissolves and flushes away the residual stains in the multi-directional circulation, and the high-temperature steam can completely kill the microorganisms in the pipeline, achieving the purpose of efficient disinfection. The steam can also be used to empty the residual liquid in the main pipeline, ensuring that there is no water accumulation in the pipeline after cleaning, eliminating the risk of secondary pollution, and improving the hygiene and safety of the liquid circuit system.

[0094] In the description of the present specification, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0095] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terms "comprise", "comprising", "include", "including", "contain", "containing" or variations thereof are used inclusively and do not exclude the additional inclusion of unrecited features, structures, materials, or characteristics.

[0096] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be interpreted as limiting the present application, and ordinary skilled people in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A liquid circuit system for a fresh milk machine, characterized in that, This includes hot water boilers, circulating heating boilers, cold water tanks, heat exchangers, cold milk tanks, hot milk tanks, and steam boilers. The cold water tank is connected to a hot water boiler, a circulating heating boiler, and a steam boiler. The hot water boiler is connected to valve V11, and the steam boiler is connected to the P end of valve V12; The heat exchanger has four ports, and two of the heat exchanger ports are respectively connected to the circulating heating boiler. The cold milk box is connected to valve V06, which is connected to the cold milk outlet. The hot milk box is connected to one port of the heat exchanger pipe, and the other port of the heat exchanger pipe is connected to valve V05, which is connected to the hot milk outlet. Valve V11 is connected to valves V12, V07 and V09 respectively, and valve V12 is also connected to valves V07 and V09. Both valve V11 and valve V12 are connected to valve V05, and both valve V11 and valve V12 are connected to valve V06. A valve V08 is provided between end A of valve V12 and valve V06. Valve V11 is connected to valve V09 and valve V10. Valve V10 is connected to valve V04.

2. The liquid circuit system of a fresh milk machine according to claim 1, characterized in that, The first pipeline connects the cold milk box and the valve V06. Along the direction from the cold milk box to the valve V06, a cold milk raw material extraction pump P2, a pipeline level sensor L2, and a valve V02 are sequentially arranged on the first pipeline.

3. The liquid circuit system of a fresh milk machine according to claim 1, characterized in that, The second pipeline connects the milk heating tank and the valve V05. Along the direction from the milk heating tank to the valve V05, the second pipeline is sequentially equipped with a milk raw material extraction pump P3, a pipeline level sensor L3, a valve V01, and a heat exchanger E1.

4. The liquid circuit system of a fresh milk machine according to claim 1, characterized in that, A wastewater discharge box is provided below the cold milk outlet and the hot milk outlet.

5. The liquid circuit system of a fresh milk machine according to claim 1, characterized in that, Valve V02 is connected to valve V04, valve V01 is connected to valve V03, and both valve V04 and valve V03 are connected to a tailwater tank. The tailwater tank is connected to the tailwater discharge box.

6. The liquid circuit system of a fresh milk machine according to claim 1, characterized in that, The cold water tank is connected in sequence to a filter, a pipeline level sensor L1, and a valve V18 at the water supply end.

7. The liquid circuit system of a fresh milk machine according to claim 1, characterized in that, A one-way valve Y2, with a direction from V10 to V02, is provided between valve V02 and valve V10; a one-way valve Y4, with a direction from V08 to V06, is provided between valve V06 and valve V08; a one-way valve Y5, with a direction from V07 to V05, is provided between valve V05 and valve V07; and a one-way valve Y3, with a direction from V09 to V01, is provided between valve V01 and valve V09.

8. The liquid circuit system of a fresh milk machine according to claim 1, characterized in that, Temperature sensors are installed on the hot water boiler, circulating hot water boiler, steam boiler, steam boiler exhaust port, and heat exchanger.

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