阅读说明：本技术 一种发泡牛奶及其制备方法 (Foamed milk and preparation method thereof ) 是由 王昌岭 吕继明 李琦 李玉芹 孙鹏 赵旭超 于 2020-08-18 设计创作，主要内容包括：本发明公开了一种发泡牛奶及其制备方法,该发泡牛奶的制备方法中通过牛奶发泡设备将牛奶进行发泡,该牛奶发泡设备通过第一混合机构将部分原料奶与发泡剂水溶液制备第一混合奶,通过第二混合机构将部分原料奶与香精水溶液制备第二混合奶,然后将第一混合奶、第二混合奶输送至发泡机构,发泡机构将第一混合奶、第二混合奶以及余下的原料奶混合均匀,得到牛奶组合物,通过发泡辅助机构向发泡机构中输送空气与蒸汽,通过发泡机构将空气与蒸汽充分分散到牛奶组合物中,使得牛奶组合物中形成大量奶泡；该牛奶发泡设备自动化程度高,发泡牛奶生产效率高,且生产的发泡牛奶中的奶泡多,且奶泡大小均匀、细腻,提高了牛奶的风味。(The invention discloses foamed milk and a preparation method thereof, wherein milk is foamed through a milk foaming device in the preparation method of the foamed milk, the milk foaming device prepares a first mixed milk by a first mixing mechanism from partial raw milk and a foaming agent aqueous solution, prepares a second mixed milk by a second mixing mechanism from partial raw milk and an essence aqueous solution, then conveys the first mixed milk and the second mixed milk to a foaming mechanism, the foaming mechanism uniformly mixes the first mixed milk, the second mixed milk and the rest raw milk to obtain a milk composition, conveys air and steam into the foaming mechanism through a foaming auxiliary mechanism, and fully disperses the air and the steam into the milk composition through the foaming mechanism to form a large amount of milk bubbles in the milk composition; the milk foaming equipment has high automation degree and high production efficiency of the foamed milk, and the produced foamed milk has more milk bubbles with uniform and fine sizes, thereby improving the flavor of the milk.)

1. The foaming milk is characterized by being prepared from the following components in parts by weight:

90-110 parts of milk, 0.06-0.12 part of foaming agent, 0.04-0.06 part of essence and 10-15 parts of water;

the foamed milk is prepared by the following steps:

step one, centrifugal milk purification treatment: reducing the temperature of the milk to below 8 ℃, and then removing mechanical impurities in the milk by a centrifugal milk purification method;

step two, sterilization and cooling treatment: pasteurizing the milk subjected to centrifugal milk purification treatment for 15 seconds at 75-90 ℃, and cooling the pasteurized milk to below 8 ℃ to obtain raw milk;

step three, adding a foaming agent: heating 20-30% of raw milk to 65-70 ℃, adding a foaming agent, stirring for 15-20 min, and uniformly stirring to obtain first mixed milk;

step four, adding essence: heating 10-15% of the raw milk to 30-40 ℃, adding essence, stirring for 10-15 min, and uniformly stirring to obtain second mixed milk;

step five, foaming treatment: uniformly mixing the second mixed milk, the first mixed milk and the rest raw milk, and then performing foaming treatment to obtain a milk composition;

step six, sterilizing and packaging: pasteurizing the milk composition at 137-142 ℃ for 4 seconds, cooling the pasteurized milk composition to below 25 ℃ and aseptically filling to obtain the foamed milk.

2. The foamed milk according to claim 1, wherein the foaming agent is an ester emulsifier, and the ester emulsifier is propylene glycol alginate, decaglycerol monolaurate or a mixture of acetylated mono-and diglycerol fatty acid esters according to a weight ratio of 1:2: 2.

3. The method for preparing frothed milk according to claim 1, characterized by comprising the following steps:

the method comprises the following steps: reducing the temperature of the milk to below 8 ℃, and then removing mechanical impurities in the milk by a centrifugal milk purification method;

step two: pasteurizing the milk subjected to centrifugal milk purification treatment for 15 seconds at 75-90 ℃, and cooling the pasteurized milk to below 8 ℃ to obtain raw milk;

step three: uniformly mixing a foaming agent with half of water by weight to obtain a foaming agent aqueous solution, injecting the foaming agent aqueous solution into a first additive tank (107) of milk foaming equipment, uniformly mixing essence with the other half of water by weight to obtain an essence aqueous solution, and injecting the essence aqueous solution into a second additive tank (307);

step four: the method comprises the steps that raw milk is conveyed into a first conveying pipeline (600) through a pump, the flow rates of a first raw material conveying pipe (104), a second raw material conveying pipe (204) and a third raw material conveying pipe (304) are respectively adjusted by adjusting a first electromagnetic valve (105), a second electromagnetic valve (205) and a sixth electromagnetic valve (305), 20-30% of the raw milk is conveyed into a first mixing tank (101), 10-15% of the raw milk is conveyed into a second mixing tank (301), and the rest of the raw milk is conveyed into a foaming tank (201);

step five: heating the raw milk in the first mixing tank (101) to 65-70 ℃ through a heating pipe in the first mixing tank (101), adding a foaming agent aqueous solution, starting a first stirring motor (102), stirring the raw milk in the first mixing tank (101) and the foaming agent aqueous solution for 15-20 min through a stirring blade (20) by the operation of the first stirring motor (102), and uniformly stirring to obtain first mixed milk;

step six: heating the raw milk in the second mixing tank (301) to 30-40 ℃ through a heating pipe in the second mixing tank (301), adding an essence aqueous solution, starting a third stirring motor (302), stirring the raw milk and the essence aqueous solution in the second mixing tank (301) for 10-15 min through a stirring blade (20) by the operation of the third stirring motor (302), and uniformly stirring to obtain second mixed milk;

step seven: opening a third electromagnetic valve (208), a fourth electromagnetic valve (209) and a seventh electromagnetic valve (308), closing a second electromagnetic valve (205), a fifth electromagnetic valve (210) and an eighth electromagnetic valve (309), starting a first conveying pump (103) and a third conveying pump (303), wherein the first conveying pump (103) operates to pump first mixed milk out of a first mixing tank (101), the first mixed milk is conveyed into a second conveying pipeline (700) through a first return pipe (106), the third conveying pump (303) operates to pump second mixed milk out of a second mixing tank (301), the second mixed milk is conveyed into a second conveying pipeline (700) through a third return pipe (306), and the first mixed milk and the second mixed milk jointly enter a second raw material conveying pipe (204) through a second return pipe (207) and then are conveyed into a foaming tank (201);

step eight: starting a second stirring motor (202), wherein the second stirring motor (202) runs to stir the first mixed milk, the second mixed milk and the raw milk in the foaming tank (201) through a stirring blade (20), and the raw milk is uniformly stirred to obtain a milk composition;

step nine: opening an eighth electromagnetic valve (309) and a fifth electromagnetic valve (210), closing a seventh electromagnetic valve (308) and a fourth electromagnetic valve (209), starting a gas delivery pump (404), delivering steam into the gas delivery pump (404) through a steam inlet pipe (402), delivering air into the gas delivery pump (404) through an air inlet pipe (405), operating the gas delivery pump (404), delivering the air and the steam into a second delivery pipeline (700) through a mixing output pipe (406), delivering the air and the steam into a foaming tank (201) through a gas delivery pipe (206), entering a milk composition, fully dispersing the air and the steam in the milk composition through stirring of a stirring blade (20) to form milk bubbles, and obtaining a foamed milk semi-finished product;

step ten: and starting a second delivery pump (203), operating the second delivery pump (203) to pump the foamed milk semi-finished product out of the foaming tank (201), pasteurizing the foamed milk semi-finished product at 137-142 ℃ for 4 seconds, cooling the sterilized milk composition to below 25 ℃ and carrying out aseptic filling to obtain the foamed milk.

4. The preparation method of foamed milk according to claim 3, wherein the milk foaming device in step three comprises a first mixing mechanism (100), a foaming mechanism (200), a second mixing mechanism (300), a foaming auxiliary mechanism (400), a mounting frame (500), a first conveying pipeline (600) and a second conveying pipeline (700), the first mixing mechanism (100), the foaming mechanism (200) and the second mixing mechanism (300) are mounted on the mounting frame (500), the foaming mechanism (200) is located at the middle position of the first mixing mechanism (100) and the second mixing mechanism (300), the foaming auxiliary mechanism (400) is arranged on one side of the mounting frame (500), the foaming auxiliary mechanism (400) is located on one side of the second mixing mechanism (300), and the first conveying pipeline (600) and the second conveying pipeline (600) are arranged on one side of the first mixing mechanism (100), the foaming mechanism (200) and the second mixing mechanism (300), A second delivery duct (700), the first delivery duct (600) being located below the second delivery duct (700).

5. The preparation method of the foamed milk according to claim 4, wherein the first mixing mechanism (100) comprises a first mixing tank (101), a first stirring motor (102), a first delivery pump (103), a first raw material delivery pipe (104), a first solenoid valve (105), a first return pipe (106), and a first additive tank (107), the first stirring motor (102) is installed at the top axle center of the first mixing tank (101), the first additive tank (107) is installed at one side of the top of the first mixing tank (101), the discharge port of the first additive tank (107) is located in the inner cavity of the first mixing tank (101), the first metering valve is installed on the discharge port of the first additive tank (107), one side of the top of the first mixing tank (101) is communicated to one end of the first raw material delivery pipe (104), and the other end of the first raw material delivery pipe (104) is communicated to the top of the first delivery pipe (600), the first raw material conveying pipe (104) is provided with a first electromagnetic valve (105), the bottom of the first mixing tank (101) is provided with a first conveying pump (103), an inlet of the first conveying pump (103) is located in an inner cavity of the first mixing tank (101), an outlet of the first conveying pump (103) is communicated to one end of a first return pipe (106), and the other end of the first return pipe (106) is communicated to one end of a second conveying pipeline (700).

6. The preparation method of the foamed milk according to claim 4, wherein the foaming mechanism (200) comprises a foaming tank (201), a second stirring motor (202), a second delivery pump (203), a second raw material delivery pipe (204), a second electromagnetic valve (205), a gas delivery pipe (206), a second return pipe (207), a third electromagnetic valve (208), a fourth electromagnetic valve (209) and a fifth electromagnetic valve (210), the second stirring motor (202) is installed at the top axis of the foaming tank (201), one side of the top of the foaming tank (201) is communicated to one end of the second raw material delivery pipe (204), the other end of the second raw material delivery pipe (204) is communicated to the top of the first delivery pipe (600), the second electromagnetic valve (205) is installed on the second raw material delivery pipe (204), the second delivery pump (203) is installed at the bottom of the foaming tank (201), the inlet of the second conveying pump (203) is located in an inner cavity of a foaming tank (201), one side of the bottom of the foaming tank (201) is communicated to one end of a gas conveying pipe (206), the other end of the gas conveying pipe (206) is communicated to the bottom of a second conveying pipeline (700), a fifth electromagnetic valve (210) is installed on the gas conveying pipe (206), a fourth electromagnetic valve (209) is installed on the second conveying pipeline (700), one side, away from the gas conveying pipe (206), of the fourth electromagnetic valve (209) is provided with a second return pipe (207), a third electromagnetic valve (208) is installed on the second return pipe (207), one end of the second return pipe (207) is communicated to the top of the second conveying pipeline (700), and the other end of the second return pipe (207) is communicated to one side of a second raw material conveying pipe (204).

7. The preparation method of the foamed milk according to claim 4, wherein the second mixing mechanism (300) comprises a second mixing tank (301), a third stirring motor (302), a third delivery pump (303), a third raw material delivery pipe (304), a sixth solenoid valve (305), a third return pipe (306), a second additive tank (307), a seventh solenoid valve (308), and an eighth solenoid valve (309), the third stirring motor (302) is installed at the top axial center of the second mixing tank (301), the second additive tank (307) is installed at one side of the top of the second mixing tank (301), the discharge port of the second additive tank (307) is located in the inner cavity of the second mixing tank (301), the second metering valve is installed at the discharge port of the second additive tank (307), and one side of the top of the second mixing tank (301) is communicated to one end of the third raw material delivery pipe (304), the other end of the third raw material conveying pipe (304) is communicated to one end of a first conveying pipeline (600), a sixth electromagnetic valve (305) is installed on the third raw material conveying pipe (304), a third conveying pump (303) is installed at the bottom of the second mixing tank (301), an inlet of the third conveying pump (303) is located in an inner cavity of the second mixing tank (301), an outlet of the third conveying pump (303) is communicated to one end of a third return pipe (306), the other end of the third return pipe (306) is communicated to the bottom of the second conveying pipeline (700), a seventh electromagnetic valve (308) is installed on the third return pipe (306), and an eighth electromagnetic valve (309) is installed on the second conveying pipeline (700).

8. The preparation method of the foamed milk according to claim 4, wherein heating pipes are installed in the inner walls of the first mixing tank (101), the foaming tank (201) and the second mixing tank (301), stirring blades (20) are installed on the output shafts of the first stirring motor (102), the second stirring motor (202) and the third stirring motor (302), and the three stirring blades (20) are respectively located in the inner cavities of the first mixing tank (101), the foaming tank (201) and the second mixing tank (301).

9. The preparation method of the foamed milk according to claim 4, wherein the foaming auxiliary mechanism (400) comprises an installation bin (401), a steam inlet pipe (402), an installation plate (403), a gas delivery pump (404), an air inlet pipe (405) and a mixing output pipe (406), the installation plate (403) is installed in the middle of an inner cavity of the installation bin (401), the gas delivery pump (404) is installed at the top of the installation plate (403), the steam inlet pipe (402) and the air inlet pipe (405) are connected to an inlet of the gas delivery pump (404), one end of the steam inlet pipe (402) penetrates through the bottom of the installation bin (401), one end of the air inlet pipe (405) penetrates through the top of the installation bin (401), and an outlet of the gas delivery pump (404) is communicated to one end of the second delivery pipe (700).

Technical Field

The invention relates to the field of food, in particular to foamed milk and a preparation method thereof.

Background

The milk has high nutritive value, the mineral substances in the milk are rich, the contents of phosphorus, iron, zinc, copper, manganese and molybdenum are all large except the known calcium, most rarely, the milk is the best source of calcium for a human body, and the proportion of calcium and phosphorus is very proper, so that the milk is beneficial to the absorption of calcium. The product has complex types, at least more than 100 types, and the main components comprise water, fat, phospholipid, protein, lactose, inorganic salt and the like.

However, the existing milk has little improvement on mouthfeel, flavor and nutrition, has single mouthfeel and flavor, and cannot meet the requirements of consumers.

Therefore, milk foam is formed in milk, which is beneficial to improving the flavor of the milk, and the patent with the application number of CN201310247345.2 discloses a milk foaming machine, which continuously introduces air into a foaming area near a stirrer through an air pipe positioned above the stirrer by means of negative pressure generated by the rotation of the stirrer in the whole rotating process of the stirrer, so that the air required by continuous stirring and foaming is provided, the milk is foamed more fully and finely, the product structure is simple, the production and assembly are quick, the cost is lower, the use of a consumer is convenient, the cleaning is easy, the use is economic, and the following defects still exist: the milk foaming machine has low efficiency of producing the foamed milk, and the produced foamed milk has less milk foam and uneven size, thereby influencing the quality of the foamed milk.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide foamed milk and a preparation method thereof: removing mechanical impurities in milk by a centrifugal milk purification method, carrying out pasteurization to obtain raw milk, mixing a foaming agent and water to obtain a foaming agent aqueous solution, injecting the foaming agent aqueous solution into a first additive tank of milk foaming equipment, mixing essence and water to obtain an essence aqueous solution, injecting the essence aqueous solution into a second additive tank, conveying 20-30% of the raw milk into the first mixing tank by adjusting a first electromagnetic valve, a second electromagnetic valve and a sixth electromagnetic valve, conveying 10-15% of the raw milk into the second mixing tank, conveying the rest raw milk into a foaming tank, uniformly stirring the raw milk in the first mixing tank and the foaming agent aqueous solution at 65-70 ℃ by driving a stirring blade through the operation of a first stirring motor to obtain first mixed milk, uniformly stirring the raw milk in the second mixing tank and the essence aqueous solution at 30-40 ℃ by driving the stirring blade through the operation of a third stirring motor, obtaining second mixed milk, enabling the first mixed milk and the second mixed milk to enter a second raw material conveying pipe through a second return pipe, conveying the second mixed milk and the second raw material conveying pipe into a foaming tank, driving a stirring blade to stir the first mixed milk, the second mixed milk and the raw material milk in the foaming tank by the operation of a second stirring motor, uniformly stirring to obtain a milk composition, starting a gas conveying pump, conveying steam into the gas conveying pump by a steam inlet pipe, conveying air into the gas conveying pump by an air inlet pipe, conveying the air and the steam into the foaming tank by the operation of the gas conveying pump, entering the milk composition, fully dispersing the air and the steam in the milk composition by the stirring of the stirring blade to form milk bubbles to obtain a foamed milk semi-finished product, carrying out pasteurization on the foamed milk semi-finished product for 4 seconds at the temperature of 137-142 ℃, cooling the sterilized milk composition to the temperature below 25 ℃ for aseptic filling, the obtained foamed milk solves the problems that the conventional milk foaming machine is low in efficiency of producing foamed milk, and the quality of the foamed milk is influenced due to less and uneven milk foam in the produced foamed milk.

The purpose of the invention can be realized by the following technical scheme:

the foaming milk is prepared from the following components in parts by weight:

90-110 parts of milk, 0.06-0.12 part of foaming agent, 0.04-0.06 part of essence and 10-15 parts of water;

the foamed milk is prepared by the following steps:

step one, centrifugal milk purification treatment: reducing the temperature of the milk to below 8 ℃, and then removing mechanical impurities in the milk by a centrifugal milk purification method;

step two, sterilization and cooling treatment: pasteurizing the milk subjected to centrifugal milk purification treatment for 15 seconds at 75-90 ℃, and cooling the pasteurized milk to below 8 ℃ to obtain raw milk;

step three, adding a foaming agent: heating 20-30% of raw milk to 65-70 ℃, adding a foaming agent, stirring for 15-20 min, and uniformly stirring to obtain first mixed milk;

step four, adding essence: heating 10-15% of the raw milk to 30-40 ℃, adding essence, stirring for 10-15 min, and uniformly stirring to obtain second mixed milk;

step five, foaming treatment: uniformly mixing the second mixed milk, the first mixed milk and the rest raw milk, and then performing foaming treatment to obtain a milk composition;

step six, sterilizing and packaging: pasteurizing the milk composition at 137-142 ℃ for 4 seconds, cooling the pasteurized milk composition to below 25 ℃ and aseptically filling to obtain the foamed milk.

As a further scheme of the invention: the foaming agent is an ester emulsifier, and the ester emulsifier is propylene glycol alginate, decaglycerol monolaurate or a mixture of acetylated mono-and diglycerol fatty acid esters according to the weight part ratio of 1:2: 2.

As a further scheme of the invention: a preparation method of foamed milk comprises the following steps:

the method comprises the following steps: reducing the temperature of the milk to below 8 ℃, and then removing mechanical impurities in the milk by a centrifugal milk purification method;

step two: pasteurizing the milk subjected to centrifugal milk purification treatment for 15 seconds at 75-90 ℃, and cooling the pasteurized milk to below 8 ℃ to obtain raw milk;

step three: uniformly mixing a foaming agent with half of water by weight to obtain a foaming agent aqueous solution, injecting the foaming agent aqueous solution into a first additive tank of milk foaming equipment, uniformly mixing essence with the other half of water by weight to obtain an essence aqueous solution, and injecting the essence aqueous solution into a second additive tank;

step four: conveying raw milk into a first conveying pipeline through a pump, respectively adjusting the flow rates of a first raw material conveying pipe, a second raw material conveying pipe and a third raw material conveying pipe by adjusting a first electromagnetic valve, a second electromagnetic valve and a sixth electromagnetic valve, conveying 20-30% of the raw milk into a first mixing tank, conveying 10-15% of the raw milk into a second mixing tank, and conveying the rest raw milk into a foaming tank;

step five: heating the raw milk in the first mixing tank to 65-70 ℃ through a heating pipe in the first mixing tank, adding a foaming agent aqueous solution, starting a first stirring motor, stirring the raw milk in the first mixing tank and the foaming agent aqueous solution for 15-20 min through stirring blades by the first stirring motor, and uniformly stirring to obtain first mixed milk;

step six: heating the raw milk in the second mixing tank to 30-40 ℃ through a heating pipe in the second mixing tank, adding an essence aqueous solution, starting a third stirring motor, stirring the raw milk and the essence aqueous solution in the second mixing tank for 10-15 min through stirring blades by the third stirring motor, and uniformly stirring to obtain second mixed milk;

step seven: opening a third electromagnetic valve, a fourth electromagnetic valve and a seventh electromagnetic valve, closing a second electromagnetic valve, a fifth electromagnetic valve and an eighth electromagnetic valve, starting a first conveying pump and a third conveying pump, wherein the first conveying pump operates to pump out first mixed milk from a first mixing tank, the first mixed milk is conveyed into a second conveying pipeline through a first return pipe, the third conveying pump operates to pump out second mixed milk from a second mixing tank, the second mixed milk is conveyed into the second conveying pipeline through a third return pipe, and the first mixed milk and the second mixed milk jointly enter a second raw material conveying pipe through the second return pipe and are then conveyed into a foaming tank;

step eight: starting a second stirring motor, wherein the second stirring motor operates to stir the first mixed milk, the second mixed milk and the raw milk in the foaming tank through the stirring blades, and the milk composition is obtained after uniform stirring;

step nine: opening an eighth electromagnetic valve and a fifth electromagnetic valve, closing a seventh electromagnetic valve and a fourth electromagnetic valve, starting a gas delivery pump, delivering steam into the gas delivery pump through a steam inlet pipe, delivering air into the gas delivery pump through an air inlet pipe, delivering the air and the steam into a second delivery pipeline through a mixing output pipe by the operation of the gas delivery pump, delivering the air and the steam into a foaming tank through the gas delivery pipe, delivering the air and the steam into a milk composition, fully dispersing the air and the steam into the milk composition through the stirring of a stirring blade to form milk foam, and obtaining a semi-finished product of the foamed milk;

step ten: and starting a second delivery pump, operating the second delivery pump to pump the semi-finished product of the foamed milk out of the foaming tank, pasteurizing the semi-finished product of the foamed milk for 4 seconds at the temperature of 137-142 ℃, cooling the sterilized milk composition to below 25 ℃ and carrying out aseptic filling to obtain the foamed milk.

As a further scheme of the invention: milk foaming equipment in step three, including first mixing mechanism, foaming mechanism, second mixing mechanism, foaming complementary unit, mounting bracket, first pipeline, second pipeline, install first mixing mechanism, foaming mechanism, second mixing mechanism on the mounting bracket, foaming mechanism is located the intermediate position of first mixing mechanism, second mixing mechanism, mounting bracket one side is provided with foaming complementary unit, foaming complementary unit is located one side of second mixing mechanism, one side of first mixing mechanism, foaming mechanism, second mixing mechanism is provided with first pipeline, second pipeline, first pipeline is located the below of second pipeline.

As a further scheme of the invention: the first mixing mechanism comprises a first mixing tank, a first stirring motor, a first delivery pump, a first raw material delivery pipe, a first electromagnetic valve, a first return pipe and a first additive tank, wherein the top axle center of the first mixing tank is provided with the first stirring motor, one side of the top of the first mixing tank is provided with the first additive tank, the discharge port of the first additive tank is positioned in the inner cavity of the first mixing tank, the discharge port of the first additive tank is provided with a first metering valve, one side of the top of the first mixing tank is communicated with one end of the first raw material delivery pipe, the other end of the first raw material delivery pipe is communicated with the top of a first delivery pipeline, the first electromagnetic valve is arranged on the first raw material delivery pipe, the bottom of the first mixing tank is provided with the first delivery pump, and the inlet of the first delivery pump is positioned in the inner cavity of the first mixing tank, the outlet of the first conveying pump is communicated to one end of a first return pipe, and the other end of the first return pipe is communicated to one end of a second conveying pipeline.

As a further scheme of the invention: the foaming mechanism comprises a foaming tank, a second stirring motor, a second delivery pump, a second raw material delivery pipe, a second electromagnetic valve, a gas delivery pipe, a second return pipe, a third electromagnetic valve, a fourth electromagnetic valve and a fifth electromagnetic valve, wherein the second stirring motor is installed at the axis of the top of the foaming tank, one side of the top of the foaming tank is communicated with one end of the second raw material delivery pipe, the other end of the second raw material delivery pipe is communicated with the top of the first delivery pipeline, the second electromagnetic valve is installed on the second raw material delivery pipe, the second delivery pump is installed at the bottom of the foaming tank, the inlet of the second delivery pump is positioned in the inner cavity of the foaming tank, one side of the bottom of the foaming tank is communicated with one end of the gas delivery pipe, the other end of the gas delivery pipe is communicated with the bottom of the second delivery pipeline, and the fifth electromagnetic valve is installed on the gas delivery, the gas conveying device is characterized in that a fourth electromagnetic valve is installed on the second conveying pipeline, a second return pipe is arranged on one side, away from the gas conveying pipe, of the fourth electromagnetic valve, a third electromagnetic valve is installed on the second return pipe, one end of the second return pipe is communicated to the top of the second conveying pipeline, and the other end of the second return pipe is communicated to one side of the second raw material conveying pipe.

As a further scheme of the invention: the second mixing mechanism comprises a second mixing tank, a third stirring motor, a third delivery pump, a third raw material delivery pipe, a sixth electromagnetic valve, a third return pipe, a second additive tank, a seventh electromagnetic valve and an eighth electromagnetic valve, the top axle center of the second mixing tank is provided with the third stirring motor, one side of the top of the second mixing tank is provided with the second additive tank, the discharge port of the second additive tank is positioned in the inner cavity of the second mixing tank, the discharge port of the second additive tank is provided with a second metering valve, one side of the top of the second mixing tank is communicated with one end of the third raw material delivery pipe, the other end of the third raw material delivery pipe is communicated with one end of the first delivery pipe, the third raw material delivery pipe is provided with the sixth electromagnetic valve, the bottom of the second mixing tank is provided with the third delivery pump, the inlet of the third delivery pump is positioned in the inner cavity of the second mixing tank, an outlet of the third conveying pump is communicated to one end of a third return pipe, the other end of the third return pipe is communicated to the bottom of a second conveying pipeline, a seventh electromagnetic valve is installed on the third return pipe, and an eighth electromagnetic valve is installed on the second conveying pipeline.

As a further scheme of the invention: heating pipes are installed in the inner walls of the first mixing tank, the foaming tank and the second mixing tank, stirring blades are installed on output shafts of the first stirring motor, the second stirring motor and the third stirring motor, and the three stirring blades are located in inner cavities of the first mixing tank, the foaming tank and the second mixing tank respectively.

As a further scheme of the invention: foaming complementary unit is including installation storehouse, steam admission pipe, mounting panel, gas delivery pump, air admission pipe, mixed output tube, the inner chamber mid-mounting in installation storehouse has the mounting panel, the gas delivery pump is installed at the top of mounting panel, the access connection of gas delivery pump has steam admission pipe and air admission pipe, the bottom in installation storehouse is run through to the one end of steam admission pipe, the top in installation storehouse is run through to the one end of air admission pipe, the export intercommunication of gas delivery pump is served to second pipeline.

The invention has the beneficial effects that:

removing mechanical impurities in milk by a centrifugal milk purification method, performing pasteurization to obtain raw milk, mixing a foaming agent and water to obtain a foaming agent aqueous solution, injecting the foaming agent aqueous solution into a first additive tank of milk foaming equipment, mixing essence and water to obtain an essence aqueous solution, injecting the essence aqueous solution into a second additive tank, conveying 20-30% of the raw milk into a first mixing tank by adjusting a first electromagnetic valve, a second electromagnetic valve and a sixth electromagnetic valve, conveying 10-15% of the raw milk into a second mixing tank, conveying the rest raw milk into a foaming tank, driving stirring blades by the operation of a first stirring motor to uniformly stir the raw milk and the foaming agent aqueous solution in the first mixing tank at 65-70 ℃ to obtain first mixed milk, and driving the stirring blades by the operation of a third stirring motor to uniformly stir the raw milk and the essence aqueous solution in the second mixing tank at 30-30 DEG C Uniformly stirring at 40 ℃ to obtain second mixed milk, uniformly stirring the first mixed milk and the second mixed milk together through a second return pipe into a second raw material conveying pipe, conveying the second mixed milk into a foaming tank, driving stirring blades to stir the first mixed milk, the second mixed milk and the raw material milk in the foaming tank by the operation of a second stirring motor to obtain a milk composition, starting a gas conveying pump, conveying steam into the gas conveying pump through a steam inlet pipe, conveying air into the gas conveying pump through an air inlet pipe, conveying the air and the steam into the foaming tank by the operation of the gas conveying pump, conveying the air and the steam into the milk composition, fully dispersing the air and the steam in the milk composition by the stirring of the stirring blades to form milk bubbles, obtaining a foamed milk semi-finished product, pasteurizing the foamed milk semi-finished product at 137-142 ℃ for 4 seconds, cooling the sterilized milk composition to below 25 deg.C, and aseptically packaging to obtain the foamed milk; the milk foaming equipment prepares a first mixed milk by mixing part of raw milk with a foaming agent aqueous solution through a first mixing mechanism, prepares a second mixed milk by mixing part of raw milk with an essence aqueous solution through a second mixing mechanism, then conveys the first mixed milk and the second mixed milk to a foaming mechanism, the foaming mechanism uniformly mixes the first mixed milk, the second mixed milk and the rest raw milk to obtain a milk composition, conveys air and steam into the foaming mechanism through a foaming auxiliary mechanism, and fully disperses the air and the steam into the milk composition through the foaming mechanism to form a large amount of milk bubbles in the milk composition; the milk foaming equipment has high automation degree and high production efficiency of the foamed milk, and the produced foamed milk has more milk bubbles with uniform and fine sizes, thereby improving the flavor of the milk.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of a milk frothing apparatus according to the invention;

FIG. 2 is a front view of the milk frothing apparatus of the present invention;

FIG. 3 is a schematic view of a first mixing mechanism according to the present invention;

FIG. 4 is a schematic view of the foaming mechanism of the present invention;

FIG. 5 is a schematic diagram of a second mixing mechanism of the present invention;

FIG. 6 is a view showing the connection of a first stirring motor and a stirring blade in the present invention;

fig. 7 is a schematic view of the internal structure of the foaming aid mechanism of the present invention.

In the figure: 100. a first mixing mechanism; 200. a foaming mechanism; 300. a second mixing mechanism; 400. a foaming auxiliary mechanism; 500. a mounting frame; 600. a first delivery conduit; 700. a second delivery conduit; 101. a first mixing tank; 102. a first stirring motor; 103. a first delivery pump; 104. a first feedstock delivery conduit; 105. a first solenoid valve; 106. a first return pipe; 107. a first additive tank; 201. a foaming tank; 202. a second stirring motor; 203. a second delivery pump; 204. a second feedstock delivery pipe; 205. a second solenoid valve; 206. a gas delivery pipe; 207. a second return pipe; 208. a third electromagnetic valve; 209. a fourth solenoid valve; 210. a fifth solenoid valve; 301. a second mixing tank; 302. a third stirring motor; 303. a third delivery pump; 304. a third raw material conveying pipe; 305. a sixth electromagnetic valve; 306. a third return pipe; 307. a second additive tank; 308. a seventh electromagnetic valve; 309. an eighth solenoid valve; 20. stirring blades; 401. installing a bin; 402. a steam inlet pipe; 403. mounting a plate; 404. a gas delivery pump; 405. an air inlet pipe; 406. and (5) mixing and outputting the mixture.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.