Fruit and vegetable controlled atmosphere color protection pulping device

Abstract

The invention discloses a fruit and vegetable gas-adjusting color-protecting pulping device which comprises a pulping cylinder which comprises a cylinder body and a pulping cylinder feeding port capable of being opened, and a pulp discharging pipe is arranged at the bottom of the cylinder body; the vacuum pump is connected with a cavity pipeline in the cylinder body; the controlled atmosphere gas storage device is connected with a cavity in the cylinder body through a pipeline; the invention further discloses a fruit and vegetable gas-conditioning color-protecting pulping method, by means of the device and the matched pulping method, fruit and vegetable pulp does not make contact with oxygen, browning is restrained to the maximum extent, the bubble content in finished fruit pulp is greatly reduced compared with that of a conventional process, and the fruit and vegetable pulp has the advantages of being environmentally friendly and free of pollution. According to the device and the matched process, the fruits do not need to be blanched or the components of an anti-browning agent do not need to be added, and the fruit pulp is bright in color and luster and better in flavor.

Description

Technical Field

[0001] The present invention relates to the technical field of fruit and vegetable juice preparation, and more specifically, to a fruit and vegetable gas conditioning and color protection pulping device and a method for using the same. Background Art

[0002] As people's living standards continue to improve, the concept of healthy living continues to gain popularity, and fruit juice drinks account for an increasingly higher proportion of beverages. Among them, juice made by directly grinding and pulping fresh fruits and vegetables has the characteristics of less nutrient loss, bright color, and minimal damage to the special aroma and flavor of the fruit. Therefore, it is increasingly widely accepted and welcomed by consumers. For example, there are already orange juice drinks such as NFC juice that are directly squeezed from fruits on the market, which are widely praised by consumers.

[0003] Although fruit and vegetable pulp obtained directly by squeezing or grinding fruits and vegetables has many advantages, fresh fruits and vegetables are prone to browning during the pulping process, especially fruits and vegetables rich in polyphenols such as peaches, yellow peaches, apples, etc. Therefore, the color of the pulp in general NFC fruit and vegetable juice is generally dark, which is different from the original color of the fruits and vegetables.

[0004] In order to effectively ensure the nutritional quality and appearance color of fruit and vegetable juice, Chinese patent application publication number CN106387558A discloses a fruit and vegetable juice preparation system and a fruit and vegetable juice preparation method using the system. The system grinds fruit and vegetable ice by multiple freezing, then adds flavoring agents and stabilizers to the juice, and sterilizes it by high-temperature sterilization. However, additional additives are added to the juice in this process. In addition, the high-temperature sterilization process also destroys the flavor and part of the nutrition of the juice.

[0005] At present, the main methods for inhibiting browning in fruit and vegetable pulping are blanching and adding antioxidants, but these methods have a destructive effect on the sensory quality of fruit and vegetable pulp, especially the texture and taste are very different from the pulp squeezed from fresh pulp. There is an urgent need for a new device and supporting method that can effectively inhibit the occurrence of browning in the fruit and vegetable processing and pulping process. Summary of the invention

[0006] An object of the present invention is to provide a fruit and vegetable gas conditioning and color protection pulping device and a use method, which can effectively solve the problems of color deterioration, sensory quality change and nutrient loss in the fruit and vegetable pulping process.

[0007] In order to achieve these purposes and other advantages according to the present invention, according to one aspect of the present invention, there is provided a fruit and vegetable atmosphere-conditioned color-protecting pulping device, comprising: a pulping cylinder, which comprises a cylinder body and an openable pulping cylinder feed port, a pulping pipe being provided at the bottom of the cylinder body; a vacuum pump connected to a pipeline in the internal cavity of the cylinder body; an atmosphere-conditioned gas storage device connected to a pipeline in the internal cavity of the cylinder body; and a plurality of layers of blades drivingly connected to a blade motor arranged outside the cylinder body.

[0008] Preferably, it further comprises a temperature control device, which comprises a compressor, wherein the compressor is connected to a cooling pipe in which a coolant circulates, and the cooling pipe is coiled around the outer circumference of the cylinder body.

[0009] Preferably, it further includes a controlled atmosphere hood, wherein the inside and outside of the controlled atmosphere hood are airtightly separated and the air pressure is the same, the pulping cylinder is arranged inside the controlled atmosphere hood, the pipeline of the controlled atmosphere gas storage device is connected to the controlled atmosphere hood, and the controlled atmosphere hood is also provided with fruit and vegetable preprocessing equipment, and the fruit and vegetable processing equipment includes a core removal equipment.

[0010] Preferably, the fruit and vegetable processing equipment also includes a screening device, which is a linear vibrating feeding table. The cover body of the controlled atmosphere hood is made of a transparent material, and a plurality of operating holes are provided on the cover body of the controlled atmosphere hood. An operating glove is matched and installed on each of the operating holes, and the opening of the operating glove is sealed and connected to the edge of the operating hole.

[0011] Preferably, a plurality of waste boxes are arranged on the hood body of the controlled atmosphere hood, and the waste boxes include a waste inlet and a waste outlet respectively located inside and outside the controlled atmosphere hood, and the waste inlet and the waste outlet can be closed airtightly.

[0012] Preferably, it also includes a feed hopper arranged outside the controlled atmosphere hood, the feed hopper includes a hopper shell, an openable and closable hopper inlet, and a hopper discharge pipe, the pipe mouth of the hopper discharge pipe extends into the controlled atmosphere hood, a discharge pipe gate is provided in the hopper discharge pipe, the controlled atmosphere gas storage device pipeline is connected to the interior of the hopper shell, and a hopper exhaust device pipeline is provided outside the controlled atmosphere hood, which is connected to the interior of the hopper shell.

[0013] Preferably, a first oxygen concentration monitor and a second oxygen concentration monitor are installed in the atmosphere-controlled hood and the hopper shell, respectively.

[0014] In a second aspect, the present invention provides a method for pulping fruits and vegetables by gas conditioning and color protection, which is applied to the above-mentioned fruit and vegetable gas conditioning and color protection pulping device, and comprises the following steps: S1. Fruit and vegetable pretreatment: The whole fruits are disinfected, pitted, and the pulp is screened before entering the pulping tank; S2, grinding and pulping the pulp: the feed port of the pulping cylinder is closed, the vacuum pump draws the cylinder body into a vacuum environment, and the blade motor is turned on to continuously grind the pulp in the grinding cylinder body until the pulp product is obtained; S3, pulp discharge: the gas storage device introduces gas into the cylinder to make the gas pressure in the cylinder reach 1.1 atmospheres or above, and the valve on the pulp discharge pipe is opened, and the pulp in the cylinder is discharged through the pulp discharge pipe under the action of gas pressure.

[0015] Preferably, S1 comprises the following steps: A1. The controlled atmosphere gas storage device introduces controlled atmosphere gas into the controlled atmosphere hood until the oxygen concentration in the controlled atmosphere hood is ≤2%; A2. After the sterilized intact fruits and vegetables are placed in the feed hopper, the hopper entrance is closed, and while the hopper exhaust device discharges gas, the gas storage device introduces gas into the feed hopper until the oxygen concentration in the feed hopper is ≤2%, and the discharge pipe gate is opened to allow the intact fruits and vegetables to fall into the fruit and vegetable pretreatment equipment; A3. The pitting equipment separates the pulp and the pit of the whole fruit. The pulp enters the screening equipment, and the pit enters the waste inlet through the waste chute. A4. The operator manually picks out the pulp that does not meet the pulping requirements on the screening equipment table and puts it into the waste inlet, and the remaining pulp is put into the pulping cylinder feed port through the conveying equipment.

[0016] The present invention has at least the following beneficial effects: First, the device adopts vacuum pulping for fruit and vegetable pulping. In the crushing and pulping process, the fruit and vegetable pulp is not in contact with oxygen, so browning is suppressed to the greatest extent, and the bubble content in the finished fruit pulp is greatly reduced compared with the conventional process. The device and the supporting process do not need to blanch the fruit or add anti-browning agents. The fruit pulp has better flavor, brighter color and no additives in the finished product. Second, after the pulping of fruits and vegetables is completed, the device can discharge the pulp without contacting the air by introducing gas into the cylinder and making the atmospheric pressure in the cylinder greater than the standard atmospheric pressure. The discharged pulp can be immediately connected to the packaging equipment for sealing, and the color and flavor of the finished pulp are not lost; Thirdly, by adding a controlled atmosphere hood, the device puts the fruit and vegetable pretreatment process in a low-oxygen state, preventing the fruit and vegetable pieces from being exposed to the air and causing browning, further ensuring the color of the finished fruit pulp; Fourthly, the device effectively avoids leakage of controlled atmosphere gas due to the entry and exit of fruits during controlled atmosphere operation by setting a controlled atmosphere hood in conjunction with a feed hopper, thereby saving equipment use costs.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic plan view of a device in a technical solution of the present invention; Figure 2 A schematic diagram of a device in a technical solution of the present invention Figure 2 ; Figure 3 It is a side schematic diagram of a device in a technical solution of the present invention; Figure 4 It is an overall schematic diagram of a device in a technical solution of the present invention; Figure 5 It is a schematic diagram of a device after the gas conditioning hood is removed in a technical solution of the present invention; Figure 6 A schematic diagram of a controlled atmosphere hood in a technical solution of the present invention; Figure 7 It is a schematic diagram of a section of a nucleation device and a feed hopper in a technical solution of the present invention; Figure 8 It is a schematic diagram of a screening equipment section in a technical solution of the present invention; Fig. 9 A schematic diagram of a waste bin 21 in a technical solution of the present invention; Fig.10 This is a color comparison diagram of the fruit blocks of Examples 1-2 of the present invention and Comparative Examples 1-3; Fig.11 The figure is a comparison chart of the fruit pulp colors of Examples 1-2 of the present invention and Comparative Examples 1-3.

[0019] Description of the drawings: 1-pulping cylinder, 11-cylinder body, 12-pulping cylinder feed port, 13-pulping pipe, 2-gas conditioning hood, 21-waste box, 211-waste inlet, 212-waste outlet, 22-operating hole, 3-vacuum pump, 4-blade, 41-blade motor, 5-compressor, 51-cooling pipe, 6-gas conditioning gas storage device, 61-first air supply pipeline, 62-second air supply pipeline, 63-third air supply pipeline, 7-feed hopper, 71-hopper inlet, 70-hopper shell, 72-hopper discharge pipe, 721-discharge pipe gate, 73-hopper exhaust device, 731-hopper exhaust pipe, 8-fruit and vegetable pretreatment equipment, 81-core removal equipment, 811-waste chute, 82-screening equipment, 83-transportation equipment, 9-first oxygen concentration monitor, 91-second oxygen concentration monitor, 10-pressure gauge three-way valve. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can implement the invention with reference to the description.

[0021] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0022] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0023] like Figure 1 to Figure 9 As shown, the present invention provides a fruit and vegetable gas-conditioned color-protecting pulping device, comprising: a pulping cylinder 1, which comprises a cylinder body 11 and an openable pulping cylinder feed port 12, and a pulping pipe 13 is provided at the bottom of the cylinder body 11; a vacuum pump 3, which is connected to the internal cavity pipeline of the cylinder body 11; an atmosphere-conditioned gas storage device 6, which is connected to the internal cavity pipeline of the cylinder body 11; a plurality of layers of blades 4, which are drivingly connected to a blade motor 41 arranged outside the cylinder body 11. In the present technical solution, the pulping cylinder 1 is made of stainless steel or other hard materials, and the cylinder body 11 is connected to a pressure detection device for real-time monitoring of the air pressure inside the cylinder body 11. The gas-conditioned gas storage device 6 is connected to the internal cavity pipeline of the cylinder body 11; and a plurality of layers of blades 4 are drivingly connected to a blade motor 41 arranged outside the cylinder body 11. In the present technical solution, the pulping cylinder 1 is made of stainless steel or other hard materials. The cylinder body 11 is connected to a pressure detection device for real-time monitoring of the air pressure inside the cylinder body 11. The device 6 can be canned gas that is easily available on the market. The gas-controlled gas can be nitrogen, carbon dioxide or other inert gases. The gas-controlled gas storage device 6 is connected to the cylinder body 11 through a first air supply pipeline 61. A pressure reducing valve is arranged on the first air supply pipeline 61. A sealing cover is arranged on the pulping cylinder feed port 12, which can be automatically opened and closed under the action of the cylinder. After the pulping cylinder feed port 12 is closed, the inside of the cylinder body 11 is airtightly isolated from the outside. The air intake pipe of the vacuum pump 3 is connected to the cylinder body 11. The blade motor 41 can be an air motor or a servo motor or other mechanism. A coupling can be used to cooperate with the rotating shaft for transmission between it and the blade 4. Optionally, as Figure 1As shown, the cylinder body 11 is connected to a pressure gauge three-way valve 10, and the pressure gauge three-way valve 10 includes an intake valve and an exhaust valve, which are respectively connected to the controlled atmosphere gas storage device 6 and the vacuum pump 3, wherein the pressure gauge three-way valve 10 monitors the air pressure in the cylinder body 11 in real time, and controls the opening and closing of the intake valve and the exhaust valve according to a preset air pressure value.

[0024] In the present technical solution, after the processed fruit and vegetable pieces enter the cylinder 11, the vacuum pump 3 is used to extract the gas inside the cylinder 11, and then the blade motor 41 drives the blade 4 to complete the fruit pulping inside the cylinder 11. After the fruit pulping is completed, the gas-controlled gas storage device 6 introduces gas-controlled gas into the cylinder 11 so that the air pressure inside the cylinder 11 is greater than the external air pressure. Then, the valve on the pulp discharge pipe 13 is opened, and the pulp is discharged along the pulp discharge pipe 13 under the action of air pressure. The lower end of the pulp discharge pipe 13 is connected to the filling equipment to complete the gas-controlled packaging. In the technical solution, a vacuum environment is formed inside the cylinder 11 by the vacuum pump 3. The fruit blocks are not exposed to oxygen during the crushing process, and the fruit pulp produced by crushing in the vacuum environment has very little gas content inside. The gas storage device 6 is used to discharge the finished fruit pulp from the cylinder 11 without contacting the air. The technical solution prevents the fruit blocks from contacting the external oxygen-containing environment during the pulping and subsequent filling processes, and no additives are needed. The color of the fruit pulp is guaranteed while avoiding the loss of flavor and nutrition.

[0025] In another technical solution, a temperature control device is also included, which includes a compressor 5, and the compressor 5 is connected to a cooling pipe 51 with a coolant circulating inside. The cooling pipe 51 is coiled around the outer periphery of the cylinder body 1. In this technical solution, a compressor-type refrigeration device is used, and the cylinder body 11 can be a double-layer shell structure. The spacing space between the two layers of the shell is used to accommodate the coiled cooling pipe 51, wherein the coolant circulating in the cooling pipe 51 takes away excess heat inside the pulping cylinder 1, and the coolant can be a refrigerant such as ethylene glycol. Optionally, the temperature control device can also be a semiconductor refrigeration device. Under the action of the temperature control device, the inside of the cylinder body 11 is always maintained at 0~5℃, further reducing the browning of fruit pieces and pulp under the action of biological enzymes.

[0026] In another technical solution, it also includes a controlled atmosphere hood 2, wherein the inside and outside of the controlled atmosphere hood 2 are airtightly separated and the air pressure is the same, the pulping cylinder 1 is arranged inside the controlled atmosphere hood 2, the pipeline of the controlled atmosphere gas storage device 6 is connected to the controlled atmosphere hood 2, and a fruit and vegetable preprocessing equipment 8 is also arranged in the controlled atmosphere hood 2, and the fruit and vegetable processing equipment 8 includes a core removal equipment 81, wherein the whole fruit enters the fruit and vegetable preprocessing equipment 8 from the outside of the controlled atmosphere hood 2 to complete the separation of the pulp and the core, and the screened pulp enters the pulping cylinder 1.

[0027] In the present technical scheme, since peaches and apples need to be cut or similarly operated to separate the core from the pulp before pulping, and the single-cylinder pulping and filling time is 10 to 15 minutes, the separated pulp in the general process needs to wait for a pulping cycle or longer before entering the pulping cylinder 1. In order to further reduce the browning of the pulp during the core removal operation and the waiting link, a controlled atmosphere hood 2 is added to the outside of the fruit and vegetable processing equipment 8 to achieve the purpose of creating a low-oxygen atmosphere. The controlled atmosphere hood 2 can be made of stainless steel, acrylic, etc. The air pressure inside and outside the hood of the controlled atmosphere hood 2 is maintained under normal operating conditions. Balance, the gaps between the controlled atmosphere hood 2 and the ground, pipelines, etc. can be sealed with conventional sealing materials and conventional sealing methods. An inspection port should be set on the hood body of the controlled atmosphere hood 2 to facilitate daily maintenance and disinfection of the inside of the hood body. The controlled atmosphere hood 2 is filled with a sufficient amount of controlled atmosphere gas, so that the oxygen concentration inside the controlled atmosphere hood 2 is lower than 2%. At this oxygen concentration, the browning of fruits can be effectively avoided. The fruit and vegetable pretreatment equipment 8 is an automated equipment that is easy to process or obtain in the market. There is an openable and closable solid conveying pipeline from the outside of the controlled atmosphere hood 2 to the front end of the fruit and vegetable processing equipment 8, and complete fruits and vegetables are delivered to the inside of the controlled atmosphere hood 2 in batches.

[0028] In the present technical solution, the controlled atmosphere hood 2 is mainly used to minimize the gas exchange inside and outside the hood body. The air pressure inside and outside the controlled atmosphere hood 2 is balanced. After the oxygen content inside the controlled atmosphere hood 2 is adjusted to below the required range, the controlled atmosphere gas storage device 6 is used to regularly replenish the controlled atmosphere gas to the inside of the controlled atmosphere hood 2 through the second air supply pipeline 62. Since the pulping cylinder 1 is also in the controlled atmosphere hood 2, the fruit blocks will not be exposed to the air during the process of entering the cylinder body 11. The exhaust port of the vacuum pump 3 is located outside the controlled atmosphere hood 2 to prevent the exhaust gas that may contain other components from returning to the inside of the controlled atmosphere hood 2.

[0029] In this technical solution, if Figure 2 , Figure 3As shown, the gas-conditioned hood 2 needs to be made according to the planned pulp production volume and the size of the pulping cylinder 1 and the fruit and vegetable processing equipment 8. When conducting small-batch test theoretical verification, a small vacuum pulping equipment that is easily available on the market can be selected to simulate the pulping effect of the pulping cylinder 1. The gas-conditioned hood 2 is assembled with multiple pieces of acrylic plates. An operation port is opened on the acrylic plate and the operation port is sealed with the bottom edge of a latex glove. The gas-conditioned gas in the gas-conditioned hood 2 is nitrogen, which is connected to the inside of the gas-conditioned hood 2 by a pipe. The gas-conditioned hood 2 made of acrylic plates buckles the small vacuum pulping equipment on the operating table. The edge between the gas-conditioned hood 2 and the operating table is temporarily sealed by gluing. An oxygen concentration sensor is installed in the gas-conditioned hood 2. The test personnel cut and pit the fruits in the gas-conditioned hood 2 by putting gloves into latex gloves to act as the fruit and vegetable processing equipment 8. The small batch of cut and pitted fruit blocks are put into the small vacuum pulping equipment after standing to simulate the vacuum pulping environment in the pulping cylinder 1. In the batch pulp production scenario, Figure 3 As shown, finished product automatic core removal and slicing equipment is used as the fruit and vegetable processing equipment 8, and conventional conveying equipment is used to complete the conveying of fruit pieces. After planning the equipment layout, the controlled atmosphere hood 2 is customized according to the size. The controlled atmosphere hood 2 needs to have a capacity volume as small as possible while meeting the accommodation requirements. The controlled atmosphere hood 2 has good airtightness. For the entrance of the whole fruit entering the controlled atmosphere hood 2, an exchange window, a double-channel airlock or a hopper should be installed to avoid a large amount of gas exchange when the whole fruit enters the controlled atmosphere hood 2.

[0030] In another technical solution, the fruit and vegetable processing equipment 8 also includes a screening device 82, which is a linear vibrating feeding table. The cover body of the controlled atmosphere hood 2 is made of a transparent material. A plurality of operating holes 22 are opened on the cover body of the controlled atmosphere hood 2. An operating glove 221 is matched and installed on each of the operating holes 22. The opening of the operating glove 221 is sealed and connected to the edge of the operating hole 22. After the complete fruits and vegetables enter the core removal equipment 81, the separated pulp falls into the rear end of the screening device 82 and is continuously fed forward under vibration. The operator puts his hand into the operating glove 221 from the outside of the controlled atmosphere hood 2, and picks out the pulp that does not meet the pulping requirements from the table of the screening device 82. In this technical solution, since some fruits have no problems on the outside but are rotten or shriveled inside, the pulp does not meet the pulping requirements and must be discarded according to the specifications. Therefore, after the fruit is cored, it is necessary to pick out the pulp of poor quality. The device 82 is a linear vibrating feeding table that is easily available or processed on the market. The table top of the screening device 82 is inclined at a small angle, and the table top vibrates continuously through the vibrator installed thereon. The pulp that falls from the core removal device 81 onto the table top of the screening device 82 can move slowly under the vibration. The operating gloves 221 are air-tight gloves made of latex or other materials. The staff puts both hands into the operating gloves 221 outside the atmosphere hood 2 to sort the pulp on the table top of the screening device 82. A transportation device 83 can be installed between the screening device 82 and the pulping cylinder 1 to automatically transport the screened pulp into the cylinder body 11. During the pulping process inside the pulping cylinder 1, the pulp of the next pulping batch is accumulated on the table top of the screening device 82 for screening. After the screening is completed and the previous batch of pulp is transported to the outside, the valve on the pulp discharge pipe 13 is closed, and the pulp on the table top of the screening device 82 is transported into the cylinder body 11 by using the transportation device 83.

[0031] In another technical solution, a plurality of waste boxes 21 are arranged on the cover body of the controlled atmosphere hood 2, and the waste boxes 21 include a waste inlet 211 and a waste outlet 212 respectively located inside and outside the controlled atmosphere hood 2, and the waste inlet 211 and the waste outlet 212 can be closed airtightly, such as Figures 7-9 As shown, the waste inlet 211 is located at the top of the box body of the waste box 21 located in the controlled atmosphere hood 2, and the waste outlet 212 is located at the lower part of the box body of the waste box 21 located outside the controlled atmosphere hood 2. The end of the waste inlet 211 can be matched with a sealing cover, and the waste outlet 212 can be matched with a sealing door. When the waste inlet 211 is opened, the waste outlet 212 is kept closed, and the waste discharged from the denuclearization equipment 81 and the screening equipment 82 enters the waste box 21 from the waste inlet 211 for temporary storage. When the waste box 21 needs to be cleaned, the waste inlet 211 is covered, and the sealing door of the waste outlet 212 is opened for cleaning. The waste cleaning work has little effect on the gas composition inside the controlled atmosphere hood 2.

[0032] In another technical solution, it also includes a feed hopper 7 arranged outside the controlled atmosphere hood 2, the feed hopper 7 includes a hopper shell 70, an openable and closable hopper inlet 71, and a hopper discharge pipe 72, the pipe mouth of the hopper discharge pipe 72 extends into the controlled atmosphere hood 2, and a discharge pipe gate 721 is arranged in the hopper discharge pipe 72, the controlled atmosphere gas storage device 6 is connected to the interior of the hopper shell 70 through a pipeline, and a hopper exhaust device 73 is arranged outside the controlled atmosphere hood 2 through a pipeline connected to the interior of the hopper shell 70. In this technical solution, in order to reduce the airflow exchange when the whole fruit enters the controlled atmosphere hood 2, a feed hopper 7 is arranged outside the controlled atmosphere hood 2, and the hopper exhaust device 73 is a small pump that is easily available on the market. The gas storage device 6 is connected to the hopper shell 70 through the third gas supply pipeline 63. The hopper inlet 71 is provided with a sealable hatch. The discharge pipe gate 721 can adopt a pneumatic knife gate valve to control the opening and closing of the hopper discharge pipe 72. First, the discharge pipe gate 721 is closed, and the batch of complete fruits are placed in the hopper shell 70. Then, the hatch of the hopper inlet 71 is closed, and the hopper exhaust device 73 is opened to extract the air inside the hopper shell 70, and the valve on the third gas supply pipeline 63 is opened to make the oxygen concentration in the hopper shell 70 less than or equal to the oxygen concentration inside the gas-conditioned hood 2. Then, the discharge pipe gate 721 is opened to discharge the complete fruits and vegetables in the hopper shell 70 into the fruit and vegetable pretreatment equipment 8.

[0033] In another technical solution, a first oxygen concentration monitor 9 and a second oxygen concentration monitor 91 are installed in the controlled atmosphere hood 2 and the hopper shell 70, respectively. The first oxygen concentration monitor 9 and the second oxygen concentration monitor 91 are finished products that are easily available on the market and are used to monitor the oxygen concentration in the controlled atmosphere hood 2 and the hopper shell 70, so as to facilitate the operator to perform gas supply operations.

[0034] In another technical solution, a method for pulping fruits and vegetables by gas conditioning and color protection is applied to the above-mentioned fruit and vegetable gas conditioning and color protection pulping device, comprising the following steps: S1. Fruit and vegetable pretreatment: The whole fruits are sterilized, pitted, and pulp screened before entering the pulping tank 1; S2, grinding and pulping the pulp: the pulping cylinder feed port 12 is closed, the vacuum pump 3 draws the cylinder body 11 into a vacuum environment, and the blade motor 41 is turned on to continuously grind the pulp of the grinding cylinder body 11 until the pulp is obtained; S3, pulp discharge: the gas storage device 6 introduces gas into the cylinder 11 to make the gas pressure in the cylinder 11 1.1 atmospheres or above, and opens the valve on the pulp discharge pipe 13. The pulp in the cylinder 11 is discharged through the pulp discharge pipe 13 under the action of gas pressure.

[0035] In another technical solution, S1 includes the following steps: A1. The gas storage device 6 introduces gas into the gas hood 2 until the oxygen concentration in the gas hood 2 is ≤2%; A2. After the sterilized intact fruits and vegetables are placed in the feed hopper 7, the hopper inlet 71 is closed, and while the hopper exhaust device 73 discharges the gas in the feed hopper 7, the gas storage device 6 introduces gas into the feed hopper 7 until the oxygen concentration in the feed hopper 7 is ≤2%, and the discharge pipe gate 721 is opened to allow the intact fruits and vegetables to fall into the fruit and vegetable pretreatment equipment 8; A3, the core removal device 81 separates the fruit pulp and the core from the whole fruit, the pulp enters the screening device 82, and the core enters the waste inlet 211 through the waste chute 811; A4. The operator manually picks out the fruit pulp that does not meet the pulping requirements on the screening device 82 and puts it into the waste inlet 211, and the remaining fruit pulp is put into the pulping cylinder feed port 12 through the conveying equipment.

[0036] Specific examples are provided below to further illustrate the method for pulping fruits and vegetables with gas conditioning and color protection provided by the present invention.

[0037] The whole fruit is sterilized by using the existing low-temperature ultra-high pressure sterilization method, and the following embodiments and comparative examples are completed by using a small gas conditioning hood 2, a pulping cylinder 1, a vacuum pump 3, and a nitrogen bottle that conform to the principle of the scheme.

[0038] Example 1 S1: Fresh nectarine raw materials were cleaned and sterilized by ultra-high pressure. The parameters of the ultra-high pressure sterilization equipment were set as pressure of 400 MPa, sterilization time of 5 min, ambient temperature of 4°C. The whole nectarines were pitted, cut into pieces and left to stand for 15 min in an environment with an oxygen content of less than 2%; S2: Add nectarine pieces into the pulping cylinder 1 at two-thirds of the cylinder 1, seal the cylinder 11, start the vacuum pump 3 to evacuate the pulping cylinder, start the blade motor 41, and pulp for 10 minutes; S3: nitrogen is charged into the cylinder 11, the air pressure in the pulping cylinder is 1.1 atmospheres, and the nectarine pulp is discharged and then vacuum packed.

[0039] Example 2 Fresh peaches are used as raw materials, and steps S1 to S3 are the same as those in Example 1.

[0040] Comparative Example 1 S1: Fresh nectarine raw materials were cleaned and sterilized by ultra-high pressure. The parameters of the ultra-high pressure sterilization equipment were set as pressure 400MPa, sterilization time 5 min, ambient temperature 4°C. The whole nectarines were pitted, cut into pieces and left to stand for 15 min in a normal air environment. Steps S2-S3 are the same as those in Example 1.

[0041] Comparative Example 2 S1: Fresh nectarine raw materials were cleaned and sterilized by ultra-high pressure. The parameters of the ultra-high pressure sterilization equipment were set as pressure 400MPa, sterilization time 5 min, ambient temperature 4°C. The whole nectarines were pitted, cut into pieces and left to stand for 15 min in a normal air environment. S2: Add nectarine pieces into the pulping cylinder 1 at two-thirds of the cylinder 1, maintain normal air conditions in the cylinder 11, turn on the blade motor 41, and pulp for 10 minutes.

[0042] S3: Same as Example 1.

[0043] Comparative Example 3 Fresh peaches are used as raw materials, and steps S1 to S3 are the same as those in Comparative Example 2.

[0044] The fruit pulp prepared in Example 1 to Example 2 and Comparative Example 1 to Comparative Example 3 was sampled and tested for browning degree and nutritional value using a colorimeter and ultraviolet spectrophotometer: Depend on Fig.10 , Fig.11 As can be seen from the results in Table 1, in Example 1, Comparative Example 1 and Comparative Example 2 in which the fruit is nectarine, the fruit pulp obtained in Example 1, which adopts the gas-controlled environment to remove the core and cut the fruit block, and vacuum pulping, has the highest color brightness (L value), while the fruit pulp obtained in Comparative Example 2 using the conventional process has the lowest brightness, the darkest color and is brownish, and the color of Comparative Example 1, which is left standing in the air after removing the core and cutting, is obviously brighter than that of Comparative Example 2 and darker than that of Example 1, indicating that vacuum pulping and gas-controlled pitting and cutting can effectively improve the brightness of the finished fruit pulp.

[0045] Table 1 Color difference According to the results in Table 2, Example 1 and Comparative Example 1 are basically equal in nutritional quality, and both perform significantly better than Comparative Example 2 using the conventional process. The total phenol and total flavonoid contents of Example 1 are 1460.42 mg / kg and 813.78 mg / kg, respectively, which are significantly higher than 932.44 mg / kg and 521.26 mg / kg of Comparative Example 2, which indicates that Example 1 has stronger antioxidant activity, and the total carotenoid content of Example 1 is also slightly higher than that of Comparative Example 2. Example 1 also performs well in the DPPH scavenging ability test, reaching 62.68 g / kg, while Comparative Example 2 is only 40.26 g / kg. Example 1 and Comparative Example 1 pulped under a vacuum environment show stronger antioxidant capacity than Comparative Example 2.

[0046] Example 2 is also significantly better than Comparative Example 3 in various nutritional components. The vitamin C content of Example 2 reaches 880.92 mg / kg, which is twice that of Comparative Example 3; the free amino acid content is 1284.05 mg / kg, slightly higher than that of Comparative Example 3; the total phenol and total flavonoid contents are 2023.10 mg / kg and 2307.40 mg / kg, respectively, both significantly higher than that of Comparative Example 3, showing stronger antioxidant capacity. In addition, the DPPH scavenging capacity of Example 2 is 79.90 g / kg, which is significantly higher than 47.33 g / kg of Comparative Example 3.

[0047] Free amino acids can objectively reflect the flavor of fruit pulp to a certain extent. The free amino acid content in Comparative Example 1 is lower than that in Example 1, and much higher than that in Comparative Example 2. The free amino acid content in Example 2 is much lower than that in Comparative Example 3, indicating that pulping under a vacuum environment can effectively avoid the loss of fruit flavor during pulping. At the same time, the measure of keeping the cut fruit pieces in a low oxygen environment at all times can also reduce the loss of fruit flavor to a certain extent.

[0048] Table 2 Differences in nutritional quality Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. Fruit and vegetable gas conditioning and color protection pulping device, characterized in that: include: A pulping cylinder (1), comprising a cylinder body (11) and an openable pulping cylinder feed port (12), wherein a pulping discharge pipe (13) is provided at the bottom of the cylinder body (11); A vacuum pump (3) connected to a pipeline inside the inner cavity of the cylinder (11); A gas storage device (6) for regulating gas, which is connected to a pipeline inside the cavity of the cylinder (11); A plurality of layers of blades (4) are drivingly connected to a blade motor (41) arranged outside the cylinder body (11).

2. The fruit and vegetable gas conditioning and color protection pulping device according to claim 1, characterized in that: It also includes a temperature control device, which includes a compressor (5), wherein the compressor (5) is connected to a cooling pipe (51) in which a coolant circulates, and the cooling pipe (51) is coiled around the outer circumference of the cylinder body (1).

3. The fruit and vegetable gas conditioning and color protection pulping device according to claim 1, characterized in that: The invention also comprises a controlled atmosphere hood (2), wherein the inside and outside of the controlled atmosphere hood (2) are airtightly separated and have the same air pressure, the pulping cylinder (1) is arranged inside the controlled atmosphere hood (2), the controlled atmosphere gas storage device (6) is connected to the controlled atmosphere hood (2) through a pipeline, and a fruit and vegetable pretreatment device (8) is also arranged inside the controlled atmosphere hood (2), and the fruit and vegetable treatment device (8) comprises a core removal device (81).

4. The fruit and vegetable gas conditioning and color protection pulping device according to claim 3, characterized in that: The fruit and vegetable processing equipment (8) further comprises a screening device (82), wherein the screening device (82) is a linear vibrating feeding table, the cover body of the atmosphere-controlled hood (2) is made of a transparent material, a plurality of operating holes (22) are provided on the cover body of the atmosphere-controlled hood (2), each of the operating holes (22) is matched with an operating glove (221), and the opening of the operating glove (221) is sealed and connected to the edge of the operating hole (22).

5. The fruit and vegetable gas conditioning and color protection pulping device according to claim 4, characterized in that: A plurality of waste boxes (21) are arranged on the hood body of the controlled atmosphere hood (2), and the waste boxes (21) include a waste inlet (211) and a waste outlet (212) respectively located inside and outside the controlled atmosphere hood (2), and both the waste inlet (211) and the waste outlet (212) can be closed airtightly.

6. The fruit and vegetable gas conditioning and color protection pulping device according to claim 5, characterized in that: It also includes a feed hopper (7) arranged outside the controlled atmosphere hood (2), the feed hopper (7) including a hopper shell (70), an openable and closable hopper inlet (71), and a hopper discharge pipe (72), the pipe mouth of the hopper discharge pipe (72) extends into the controlled atmosphere hood (2), a discharge pipe gate (721) is arranged in the hopper discharge pipe (72), the controlled atmosphere gas storage device (6) is connected to the interior of the hopper shell (70) through a pipeline, and a hopper exhaust device (73) is arranged outside the controlled atmosphere hood (2), and its pipeline is connected to the interior of the hopper shell (70).

7. The fruit and vegetable gas conditioning and color protection pulping device according to claim 6, characterized in that: A first oxygen concentration monitor (9) and a second oxygen concentration monitor (91) are installed in the atmosphere-controlled hood (2) and the hopper shell (70), respectively.

8. A method for pulping fruits and vegetables by gas conditioning and color protection, applied to the device for pulping fruits and vegetables by gas conditioning and color protection as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Fruit and vegetable pretreatment: The whole fruits are sterilized, pitted, and pulp screened before entering the pulping tank (1); S2, grinding and pulping the pulp: the pulping cylinder feed port (12) is closed, the vacuum pump (3) evacuates the cylinder (11) to a vacuum environment, and the blade motor (41) is turned on to continuously grind the pulp in the grinding cylinder (11) until the pulp is obtained; S3, fruit pulp discharge: the gas storage device (6) introduces gas into the cylinder (11) to make the gas pressure in the cylinder (11) 1.1 atmospheres or above, and opens the valve on the pulp discharge pipe (13), so that the fruit pulp in the cylinder (11) is discharged through the pulp discharge pipe (13) under the action of gas pressure.

9. The method for pulping fruits and vegetables by gas conditioning and color protection as claimed in claim 8, characterized in that: S1 includes the following steps: A1, the controlled atmosphere gas storage device (6) introduces controlled atmosphere gas into the controlled atmosphere hood (2) until the oxygen concentration in the controlled atmosphere hood (2) is ≤2%; A2. After placing the sterilized intact fruits and vegetables into the feed hopper (7), close the hopper inlet (71), and while the hopper exhaust device (73) discharges the gas in the feed hopper (7), the gas storage device (6) introduces gas into the feed hopper (7) until the oxygen concentration in the feed hopper (7) is ≤2%, and then open the discharge pipe gate (721) to allow the intact fruits and vegetables to fall into the fruit and vegetable pretreatment equipment (8); A3, the pitting device (81) separates the pulp and the pit of the whole fruit, the pulp enters the screening device (82), and the pit enters the waste inlet (211) through the waste chute (811); A4. The operator manually picks out the fruit pulp that does not meet the pulping requirements on the table of the screening device (82) and puts it into the waste material inlet (211), and the remaining fruit pulp is put into the pulping cylinder feed port (12) through the conveying device.

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