阅读说明：本技术 一种食品加工机的负压控制方法 (Negative pressure control method of food processor ) 是由 王旭宁 张文凡 于 2020-05-20 设计创作，主要内容包括：本发明涉及厨房小家电的控制技术,特别是一种食品加工机的负压控制方法,所述食品加工机包括密闭的制浆腔室、向制浆腔室内供入蒸汽的蒸汽产生装置,其特征在于：所述制浆腔室上设置有排气结构,其中,食品加工机的负压控制方法包括：空气排出阶段：蒸汽产生装置向制浆腔室内通入蒸汽,且蒸汽通过排气结构将制浆腔室内的空气挤压出制浆腔室外；蒸汽冷凝阶段：对制浆腔室内的蒸汽进行冷凝,以保持制浆腔室内的压强小于大气压强。采用上述食品加工机的控制方法无需使用真空泵抽取制浆腔室内的空气,也能够实现制浆腔室内的压强小于大气压强的目的。(The invention relates to a control technology of small kitchen appliances, in particular to a negative pressure control method of a food processor, wherein the food processor comprises a closed pulping chamber and a steam generating device for supplying steam into the pulping chamber, and the negative pressure control method is characterized in that: the pulping chamber is provided with an exhaust structure, wherein the negative pressure control method of the food processor comprises the following steps: air exhausting stage: the steam generating device is used for introducing steam into the pulping cavity, and the steam extrudes air in the pulping cavity out of the pulping cavity through the exhaust structure; a steam condensation stage: the steam in the pulping chamber is condensed to keep the pressure in the pulping chamber lower than the atmospheric pressure. By adopting the control method of the food processor, the purpose that the pressure in the pulping chamber is lower than the atmospheric pressure can be realized without using a vacuum pump to pump the air in the pulping chamber.)

1. A negative pressure control method of a food processor, the food processor comprising a sealed pulping chamber, a steam generating device for supplying steam into the pulping chamber, characterized in that: the pulping chamber is provided with an exhaust structure, wherein the negative pressure control method of the food processor comprises the following steps:

air exhausting stage: the steam generating device is used for introducing steam into the pulping cavity, and the steam extrudes air in the pulping cavity out of the pulping cavity through the exhaust structure;

a steam condensation stage: the steam in the pulping chamber is condensed to keep the pressure in the pulping chamber lower than the atmospheric pressure.

2. The negative pressure control method of a food processor as claimed in claim 1, wherein: before the air discharging stage, the air volume in the pulping chamber is V, and in the air discharging stage, the steam quantity introduced into the pulping chamber is V1, wherein V1 is more than 0.11V.

3. The method of controlling negative pressure in a food processor as set forth in claim 2, wherein: before the air discharging stage, materials are added into the pulping chamber, the volume of the pulping chamber is V0, and the volume of the added materials is V2, wherein V is V0-V2.

4. The method of controlling negative pressure in a food processor as set forth in claim 2, wherein: v1 is less than or equal to 11V.

5. The negative pressure control method of a food processor as claimed in claim 1, wherein: in the steam condensation stage, steam in the pulping chamber is condensed in a standing and cooling mode;

or a stirring device is arranged in the pulping chamber, and in the steam condensation stage, the stirring device condenses the steam in a stirring mode.

6. The negative pressure control method of a food processor as claimed in claim 1, wherein: the pulping chamber is provided with a heat dissipation structure, and in the steam condensation stage, the heat dissipation structure conducts heat dissipation condensation on steam in the pulping chamber.

7. The method of controlling negative pressure in a food processor as set forth in claim 6, wherein: the heat dissipation structure comprises a fan for blowing and cooling the outer wall of the pulping chamber;

or the heat radiation structure comprises a semiconductor refrigeration sheet tightly attached to the outer wall of the pulping chamber;

or the pulping chamber is formed by an inner cavity of the metal cup body, and the heat dissipation structure comprises heat dissipation fins which are arranged on the outer wall of the metal cup body and protrude outwards.

8. The negative pressure control method of a food processor as claimed in claim 1, wherein: the exhaust structure is a one-way exhaust valve;

or the exhaust structure is an electromagnetic valve;

or, food preparation machine includes cup and bowl cover, be provided with the sealing washer between cup and the bowl cover, the slurrying cavity is enclosed to close by cup and bowl cover and is formed, and in the air discharge stage, steam orders about the sealing washer and warp and form exhaust structure, and the air in the slurrying cavity extrudes the slurrying cavity outdoor by exhaust structure.

9. The negative pressure control method of a food processor as claimed in claim 1, wherein: the food processor also comprises an automatic feeding device for feeding materials into the pulping chamber, and the automatic feeding device feeds materials into the pulping chamber after the steam condensation stage.

10. The method of controlling negative pressure in a food processor as defined in claim 9, wherein: the automatic feeding device comprises a water tank and a control valve for communicating the pulping chamber with the water tank, the material is in a liquid state, and when the control valve is in an open state, the material enters the pulping chamber in a negative pressure suction mode.

Technical Field

The invention relates to a control technology of small kitchen appliances, in particular to a negative pressure control method of a food processor.

Background

Present food preparation machine, for example broken wall cooking machine or fruit juice mixer, before making fruit juice, generally need carry out evacuation processing to the container earlier, take out the air in the container through the vacuum pump, can prevent that fruit juice from taking place the oxidation at the in-process of preparation, both effectually prevented that the fruit juice color and luster from changing, simultaneously, also be favorable to reducing the nutritional loss of fruit juice. However, the existing food processor with vacuum pumping has a complex structure, and the vacuum pump is generally installed on the cup cover, which causes the volume of the cup cover to be increased and heavy, and is inconvenient for users to use and operate. Meanwhile, the food processor is high in manufacturing cost and complex in assembly.

In addition, the applicant filed a patent application No. CN202010270245.1, entitled "a splashproof food processor" before. In this patent application, it is full of the slurrying cavity to disclose liquid in the slurrying cavity after being heated into steam, thereby make the pressure in the slurrying cavity constantly increase, make the air in the slurrying cavity can be extruded the slurrying cavity through the exhaust structure between lid and the cup, and, the heat radiation structure who utilizes to set up on the cup dispels the heat to the cup, steam to in the slurrying cavity that can be quick cools off the step-down below atmospheric pressure, can prevent the in-process of smashing the blade making beating like this, the risk of a small amount of thick liquids spill takes place. However, this solution requires heating the liquid first to generate steam, and thus is not suitable for making cold drinks and juices.

Disclosure of Invention

The invention aims to provide a negative pressure control method of a food processor, which can realize the aim that the pressure in a pulping chamber is lower than the atmospheric pressure without using a vacuum pump to extract air in the pulping chamber.

In order to achieve the purpose, the invention adopts the following technical scheme: a negative pressure control method of a food processor, the food processor comprising a sealed pulping chamber, a steam generating device for supplying steam into the pulping chamber, characterized in that: the pulping chamber is provided with an exhaust structure, wherein the negative pressure control method of the food processor comprises the following steps:

air exhausting stage: the steam generating device is used for introducing steam into the pulping cavity, and the steam extrudes air in the pulping cavity out of the pulping cavity through the exhaust structure;

a steam condensation stage: the steam in the pulping chamber is condensed to keep the pressure in the pulping chamber lower than the atmospheric pressure.

Further, before the air discharging stage, the air volume in the pulping chamber is V, and in the air discharging stage, the steam amount introduced into the pulping chamber is V1, wherein V1 is more than 0.11V.

Furthermore, before the air discharging stage, the pulping chamber is filled with materials, the volume of the pulping chamber is V0, and the volume of the added materials is V2, wherein V is V0-V2.

Further, V1 is less than or equal to 11V.

Further, in the steam condensation stage, steam in the pulping chamber is condensed in a standing and cooling mode;

or a stirring device is arranged in the pulping chamber, and in the steam condensation stage, the stirring device condenses the steam in a stirring mode.

Furthermore, a heat dissipation structure is arranged on the pulping chamber, and in the steam condensation stage, the heat dissipation structure conducts heat dissipation condensation on steam in the pulping chamber.

Further, the heat dissipation structure comprises a fan for blowing and cooling the outer wall of the pulping chamber;

or the heat radiation structure comprises a semiconductor refrigeration sheet tightly attached to the outer wall of the pulping chamber;

or the pulping chamber is formed by an inner cavity of the metal cup body, and the heat dissipation structure comprises heat dissipation fins which are arranged on the outer wall of the metal cup body and protrude outwards.

Further, the exhaust structure is a one-way exhaust valve;

or the exhaust structure is an electromagnetic valve;

or, food preparation machine includes cup and bowl cover, be provided with the sealing washer between cup and the bowl cover, the slurrying cavity is enclosed to close by cup and bowl cover and is formed, and in the air discharge stage, steam orders about the sealing washer and warp and form exhaust structure, and the air in the slurrying cavity extrudes the slurrying cavity outdoor by exhaust structure.

Furthermore, the food processor also comprises an automatic feeding device for feeding materials into the pulping chamber, and the automatic feeding device feeds materials into the pulping chamber after the steam condensation stage.

Further, the automatic feeding device comprises a water tank and a control valve for communicating the pulping chamber with the water tank, the material is in a liquid state, and when the control valve is in an open state, the material enters the pulping chamber in a negative pressure suction mode.

The negative pressure control method of the food processor comprises an air discharging stage and a steam condensing stage, wherein in the air discharging stage, air in the pulping chamber is continuously squeezed by introduced steam, so that the air is discharged out of the pulping chamber through the exhaust structure, and the content of the air in the pulping chamber is effectively reduced. When the air in the pulping chamber is greatly reduced, the pulping chamber is filled with steam formed by vaporization of water. In the steam condensation stage, steam in the pulping chamber is condensed, and the steam can be liquefied after being cooled, so that water drops can be attached to the wall of the pulping chamber, and the pressure in the pulping chamber can be further reduced until the pressure is reduced to a certain range below the atmospheric pressure due to the condensation of the steam in the pulping chamber into the water drops. Therefore, by using the negative pressure control method, the air in the pulping chamber can be reduced without using a vacuum pump, the pressure in the pulping chamber can be reduced to be smaller than the atmospheric pressure, and the problem of oxidative discoloration of the fruit juice caused by air contact can be effectively prevented in the fruit juice making process. Compared with the existing vacuum wall breaking machine or vacuum fruit juice machine, the food processing machine using the negative pressure control method has simpler structure and lower manufacturing cost. Moreover, the negative pressure control method is applied to the process of preparing the fruit juice by the food processor, water does not need to be added for blending, and the condensed liquid can be fully blended with the fruit juice to adjust the taste. Meanwhile, the negative pressure control method can also be applied to a food processor to prepare the slurry, and the problem of splashing of the slurry can be effectively prevented in the pulping process.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a food processor according to an embodiment of the present invention.

Detailed Description

Example (b):

as shown in fig. 1, which is a schematic structural view of an embodiment of the food processor of the present invention, the food processor includes a machine body 1, a cup body 2 installed in the machine body 1, and a cup cover 3 covering the cup body 2, a sealing ring 31 is provided between the cup body 2 and the cup cover 3, a crushing blade 11 is installed in the cup body 2, wherein the cup body 2 and the cup cover 3 enclose to form a closed pulping chamber 10. The heating pipe (not marked in the figure) that heats cup 2 is provided with in the 2 outsides of cup, simultaneously, water tank 4 is installed to one side of organism 1, and is provided with the instant heating device (not drawn in the figure) that heats the water tank and produce steam in the water tank 4, wherein, is provided with the inlet steam inlet tap 21 of intaking or intaking steam in to cup 2 on the wall of cup 2, and wherein, the inlet steam inlet tap 21 passes through pipeline (not drawn in the figure) and communicates with water tank 4. The water tank 4 and the instant heating means form a steam generating means for supplying steam into the pulping chamber 10. In addition, a liquid discharge port (not marked in the figure) is arranged at the bottom of the cup body 2, a liquid discharge assembly 5 is installed at the liquid discharge port, wherein the liquid discharge assembly 5 comprises a liquid discharge pipe 51, a pulp receiving cup 6 and a waste water box (not shown in the figure) are arranged below the liquid discharge pipe 51, and the waste water box is located in an installation cavity (not shown in the figure) of the machine body 1 and is arranged side by side with the pulp receiving cup 6. The drain pipe 51 of the present embodiment can be rotated between the slurry receiving cup 6 and the waste water box to perform slurry discharge and waste water discharge, respectively.

The food processor of this embodiment has the following steps in the process of pulping:

1) a pulping preparation stage: adding soybeans and water into a pulping chamber;

2) air exhausting stage: the steam generating device is used for introducing steam into the pulping cavity, extruding the air in the pulping cavity by the steam and extruding the air out of the pulping cavity;

3) a steam condensation stage: carrying out standing cooling on steam in the pulping chamber to keep the pressure in the pulping chamber to be lower than atmospheric pressure;

4) and (3) crushing and boiling stage: starting the crushing blade to crush the mixture of the soybeans and the water in the pulping chamber, and boiling the pulp formed in the cup body by the heating pipe until the pulp is prepared;

5) a pulp discharging and cleaning stage: and discharging the slurry in the pulping chamber into the slurry receiving cup through the liquid discharging assembly, cleaning the pulping chamber, and discharging the cleaned wastewater into the wastewater box.

The in-process of this embodiment food preparation machine slurrying has air discharge stage and steam condensation stage, in the air discharge stage, when steam produces the device and lets in steam to the slurrying cavity in, the pressure in the slurrying cavity increases gradually to upwards the top advances the bowl cover, cause the sealing washer deformation between bowl cover and the cup, and form one-way exhaust structure between bowl cover and cup, and simultaneously, the air in the slurrying cavity is under the steam extrusion effect of constantly letting in, progressively discharges to the slurrying cavity outside through exhaust structure, the effectual content of air that has reduced the slurrying cavity. When the air in the pulping chamber is greatly reduced, the pulping chamber is filled with steam formed by vaporization of water. In the steam condensation stage, steam in the pulping chamber is subjected to standing condensation, the steam can be gradually liquefied, so that water drops can be attached to the wall of the pulping chamber, and the pressure in the pulping chamber can be further reduced until the pressure is reduced to a certain range below the atmospheric pressure due to the condensation of the steam in the pulping chamber into the water drops. For the embodiment, the two stages in the food processing machine pulping process can realize negative pressure control, and before the crushing blade crushes materials, the pulping chamber is in a negative pressure state, so that the problem of splashing of the pulp during crushing and pulping can be effectively prevented.

For this example, the materials charged into the pulping chamber were water and soybeans, wherein the volume of water and soybeans was V2, and the volume of the pulping chamber was V0, wherein the volume of air in the pulping chamber before the air discharge stage was V0-V2. Through a series of experimental researches, the inventor discovers that the steam amount V1 introduced into the pulping chamber is larger than 0.11V, so that the steam condensation stage can be ensured, and the pressure p1 in the pulping chamber is smaller than the atmospheric pressure p.

As shown in the following table, the correspondence relationship between the pressure p1 in the pulping chamber after the steam is condensed and the amount of the introduced steam V1 is found by verification of the inventor:

V1	0.11V	0.245V	0.413V	0.629V	0.917V
						p1	P	0.9P	0.8P	0.7P	0.6P
V1	1.32V	1.925V	2.934V	4.95V	11V
						p1	0.5P	0.4P	0.3P	0.2P	0.1P

meanwhile, through research, the inventor also finds that when the steam amount V1 is larger than 11V, air is basically exhausted, and when steam is continuously introduced into the pulping chamber, the steam is difficult to enter, and the steam amount in the pulping chamber reaches a saturated state.

It should be noted that, in this embodiment, the steam condensation stage is to let the steam cool by standing still and condense into water drops, which correspondingly prolongs the pulping time. Therefore, for the embodiment, steam can be condensed quickly by low-speed stirring materials through the crushing blades or the specially arranged stirring device in the process of steam condensation. And the cup body is provided with a heat dissipation structure, the heat dissipation structure dissipates heat to quickly condense steam, the heat dissipation structure can be a semiconductor refrigeration sheet tightly attached to the outer wall of the cup body, or the heat dissipation structure comprises a fan for performing air blowing cooling on the outer wall of the cup body, or the cup body is a metal cup body, and the heat dissipation structure comprises heat dissipation fins which are arranged on the outer wall of the metal cup body and protrude outwards.

It should be noted that, in this embodiment, the air in the pulping chamber is pressed out of the pulping chamber by the steam through the exhaust structure formed by deforming the sealing ring. Certainly, the pulping chamber may be provided with a special exhaust structure, for example, a one-way exhaust valve or an electromagnetic valve is provided, when steam is introduced into the pulping chamber, the one-way exhaust valve or the electromagnetic valve is opened, and the air supplement steam in the pulping chamber is extruded out of the pulping chamber.

For the embodiment, the material may be added into the pulping chamber after the steam condensation stage, for example, water is added into the pulping chamber, then steam is introduced into the pulping chamber and condensed, so that the pulping chamber forms negative pressure, meanwhile, the food processor is also provided with an automatic feeding device capable of automatically feeding soybeans, and soybeans or other dry materials can be automatically fed into the pulping chamber through the automatic feeding device. Or, before pulping, dry materials are added into the pulping chamber, then steam is introduced into the pulping chamber and condensed, so that the pulping chamber forms negative pressure, meanwhile, the water tank of the food processing machine is communicated with the pulping chamber through the control valve, when the pulping chamber forms negative pressure, the control valve is opened, water in the water tank can be sucked into the pulping chamber through a negative pressure siphon mode, and water is fed into the pulping chamber. At this time, of course, the water tank and the control valve also form an automatic feeding device for automatically feeding water into the pulping chamber.

In addition, it should be noted that the negative pressure control method of the food processor of the present embodiment is not limited to be applied to preparing hot soybean milk beverage, but can also be applied to preparing fruit juice cold beverage.

At this time, the process of preparing juice by the food processor is as follows:

1) air exhausting stage: the steam generating device introduces steam into the empty pulping chamber, the steam extrudes air in the pulping chamber, and the air is extruded out of the pulping chamber through an exhaust structure formed by deformation of the sealing ring;

2) a steam condensation stage: performing heat dissipation and cooling on steam in the pulping chamber to keep the pressure in the pulping chamber lower than atmospheric pressure until the temperature of the chamber wall of the pulping chamber is cooled to room temperature;

3) a fruit putting stage: the food processor is provided with an automatic feeding device, and fruit particles prepared in advance are fed into the pulping chamber by the automatic feeding device;

4) a fruit juice preparation stage: and starting the crushing blade to stir and crush the fruit particles to prepare the fruit juice.

By adopting the negative pressure control method, the food processor can reduce or even exhaust air in the pulping chamber without using a vacuum pump, can realize that the pressure in the pulping chamber is less than atmospheric pressure, and can effectively prevent the problem of oxidative discoloration of the fruit juice caused by contacting with air in the process of making the fruit juice. Compared with the existing vacuum wall breaking machine or vacuum juicer, the food processor using the negative pressure control method has simpler structure and lower manufacturing cost. In addition, in the process of making the fruit juice, the fruit juice is not required to be blended by adding water, the water condensed by steam can be fully blended with the fruit juice automatically, and the taste of the fruit juice can be blended by adjusting the amount of the introduced steam according to the taste requirement of a user.

When the juice is prepared by using the negative pressure control method, the steam amount V1 initially introduced into the pulping chamber is also required to be larger than 0.11V, wherein V is the volume of air in the pulping chamber and is also the volume V0 of the pulping chamber, that is, V is equal to V0.

The food processor of the invention can be a wall-breaking food processor with a lower motor, a frame-type food processor, or a juicer without a heating function. It will be appreciated by those skilled in the art that the present invention includes, but is not limited to, those illustrated in the accompanying drawings and described in the foregoing detailed description. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.