CN111248254A - Mobile fruit and vegetable batch precooling device and method - Google Patents
Mobile fruit and vegetable batch precooling device and method Download PDFInfo
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- CN111248254A CN111248254A CN202010219693.9A CN202010219693A CN111248254A CN 111248254 A CN111248254 A CN 111248254A CN 202010219693 A CN202010219693 A CN 202010219693A CN 111248254 A CN111248254 A CN 111248254A
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- 235000012055 fruits and vegetables Nutrition 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims description 25
- 238000005057 refrigeration Methods 0.000 claims description 16
- 235000013399 edible fruits Nutrition 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 10
- 235000013311 vegetables Nutrition 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012856 packing Methods 0.000 description 21
- 238000004806 packaging method and process Methods 0.000 description 9
- 230000000241 respiratory effect Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000002595 cold damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 244000141359 Malus pumila Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 235000021016 apples Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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- 230000004580 weight loss Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/04—Freezing; Subsequent thawing; Cooling
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
Abstract
The invention provides a mobile fruit and vegetable batch precooling device and a mobile fruit and vegetable batch precooling method, wherein the mobile fruit and vegetable batch precooling device comprises the following steps: the system comprises a precooling compartment body and a differential pressure precooling system arranged in the precooling compartment body; the pressure difference precooling system comprises a centrifugal fan, an evaporator and an adjustable wind shield; the centrifugal fan and the evaporator are respectively arranged at the top of the precooling box body, the centrifugal fan is embedded in the middle of the evaporator, the air outlet of the centrifugal fan is arranged on the side face, the air inlet of the centrifugal fan is arranged below, the adjustable wind shield is positioned below the centrifugal fan, and the precooled fruits and vegetables are positioned below the adjustable wind shield. The evaporator, the centrifugal fan and the wind shield adopt top design, so that the precooling speed or effect in the precooling chamber can be ensured to be consistent, and meanwhile, the effective space is saved.
Description
Technical Field
The invention belongs to the technical field of fruit and vegetable transportation, and particularly relates to a mobile fruit and vegetable batch precooling device and method.
Background
In recent years, with the rapid development of economy, the requirements of people on the drinking structure are improved, and the fruit and vegetable products are not suitable for eating and are required to be eaten well, so that the 'freshness' of the fruit and vegetable products becomes the value of the fruit and vegetable products. However, fruits and vegetables are still a living organism after being harvested, a large amount of respiratory heat can be generated due to the respiratory action of the fruits and vegetables, if the respiratory heat cannot be taken away quickly and the product temperature of the fruits and vegetables is reduced to be low enough, the fruit and vegetables can be too high in product temperature due to the accumulation of the respiratory heat in the transportation and storage processes, the respiratory action is vigorous, and finally, the nutrients and the water can be consumed quickly, the product quality is reduced, and even the fruits and vegetables are rotted and deteriorated. For a long time, the logistics technical research on harvested fruits and vegetables mostly focuses on the field of fruit and vegetable storage and preservation, and the technical research on 'the first kilometer' is neglected. The technology of 'first kilometer' means that after fruits and vegetables are harvested, the fruits and vegetables are precooled as fast as possible, respiratory heat is taken away as fast as possible, the temperature of the fruits and vegetables is reduced at the fastest speed, the respiratory intensity of the fruits and vegetables is maintained at a very low level, and the fresh-keeping and storage periods of the fruits and vegetables can be further greatly prolonged.
At present, the technologies widely applied to fruit and vegetable precooling include refrigeratory precooling, differential pressure precooling, vacuum precooling, water precooling and the like. The cold storage needs a large-scale cold storage, the pre-cooling speed is slowest, the cold storage cannot move, and the pre-cooling operation on the fruits and the vegetables cannot be carried out at the first time; the vacuum precooling speed is high, but the equipment cost is high, and the single precooling amount is small; the water precooling speed is high, water is used as a medium, so that the water source is required, and meanwhile, the water can cause cross contamination among fruits and vegetables and can easily cause the rot of the fruits and vegetables, so that the application is greatly limited. The pressure difference precooling is a precooling mode which utilizes a fan to generate static pressure difference, generates the static pressure difference on two sides of the fruit and vegetable stack in an orderly stacking mode (generally in a U shape or a square shape), and simultaneously covers the upper part of the stack by using an airtight cover to force cold air to pass through the side surface of the fruit and vegetable packing box so as to cool the fruit and vegetable.
The defects of the prior art are as follows:
(1) the applied pressure difference precooling equipment generally adopts a roller shutter mode to cover the upper part of the piled fruits and vegetables, and the mode has the biggest problem that goods cannot be stacked too high and cannot exceed the upper part of a precooling fan, and meanwhile, the goods cannot be higher than the arrangement position of the roller shutter, so that the stacking amount of the precooled goods is only half of the volume of a precooling compartment body, and the waste of the space of a box body is caused;
(2) the fan of the existing pressure difference precooling equipment is usually positioned at the front side of the precooling chamber, so that one problem caused by the large static pressure difference, high wind speed and high precooling speed of the fruit and vegetable packing box close to the fan, and the small static pressure difference, low wind speed and low precooling speed of the fruit and vegetable packing box far away from the fan can cause uneven precooling, possibly cause cold damage in serious conditions and influence the quality of the fruit and vegetable products.
Disclosure of Invention
In view of the above disadvantages in the prior art, the present invention provides a mobile device and method for bulk pre-cooling of fruits and vegetables, so as to solve the above technical problems.
In a first aspect, the present invention provides a mobile batch pre-cooling device for fruits and vegetables, comprising: the system comprises a precooling compartment body and a differential pressure precooling system arranged in the precooling compartment body; the pressure difference precooling system comprises a centrifugal fan, an evaporator and an adjustable wind shield; the centrifugal fan and the evaporator are respectively arranged at the top of the precooling box body, the centrifugal fan is embedded in the middle of the evaporator, the air outlet of the centrifugal fan is arranged on the side face, the air inlet of the centrifugal fan is arranged below, the adjustable wind shield is positioned below the centrifugal fan, and the precooled fruits and vegetables are positioned below the adjustable wind shield.
Further, the device further comprises a refrigeration system arranged in the pre-cooling compartment body, the refrigeration system is arranged at the front end of the pre-cooling compartment body, and the refrigeration system comprises: the system comprises a compressor, a condenser, an expansion valve, an axial flow fan, a high-pressure liquid storage device, a drying filter, a liquid viewing mirror, an electromagnetic valve and a ball valve.
Further, the device also comprises an electric control system; and the differential pressure precooling system and the refrigerating system are both powered and electrically controlled by an electric control system.
Further, the device also comprises a humidity regulation and control system; the humidity regulation system comprises: the fruit and vegetable precooling device comprises a first temperature and humidity sensor and a second temperature and humidity sensor, wherein the first temperature and humidity sensor is arranged in a precooled fruit and vegetable, and the second temperature and humidity sensor is arranged at an air outlet of a centrifugal fan.
Further, the device still includes the atomizing humidifier, the atomizing humidifier sets up in centrifugal fan's air outlet department.
In a second aspect, the invention provides a mobile batch pre-cooling method for fruits and vegetables, comprising the following steps:
s1: starting an electric control system to electrify the precooling device, and starting a refrigeration and differential pressure precooling program;
s2: acquiring a temperature threshold value, a precooling temperature threshold value and a precooling time threshold value in the compartment of the fruits and vegetables;
s3: collecting the temperature of the fruits and vegetables, comparing the temperature with the temperature threshold value in the compartment, stopping refrigeration when the temperature in the compartment reaches the temperature threshold value in the compartment, and continuing to run a pressure difference precooling program;
s4: collecting the temperature of the fruits and vegetables and the running time of a differential pressure precooling program and comparing the running time with a precooling temperature threshold and a precooling time threshold: and stopping running the refrigeration and pressure difference precooling program when the temperature of the fruits and vegetables reaches a precooling temperature threshold or the running time reaches a precooling time threshold.
Further, the method further comprises:
acquiring a humidity threshold of the fruits and the vegetables;
collecting humidity in the compartment and humidity of fruits and vegetables and comparing with the humidity threshold value: when the humidity in the compartment is lower than a humidity threshold value, starting the humidifier; and when the humidity of the fruits and the vegetables exceeds the humidity threshold value, the humidifier stops running.
The beneficial effect of the invention is that,
the movable device for precooling fruits and vegetables in batches and the method thereof provided by the invention have the advantages that the container type appearance design is adopted, the movable transportation and the hoisting are convenient, and the fruits and vegetables can be transported to the field by a vehicle for precooling; the evaporator, the centrifugal fan and the wind shield are designed at the top, so that static pressure differences on two sides of the packing box at various positions in the pre-cooling compartment can be consistent, the wind speed is consistent, the pre-cooling speed or effect is consistent, the effective space in the box is not occupied, about one third of the effective space is saved, meanwhile, goods can be stacked to be close to the top of the box body, and the space in the box can be utilized to the maximum extent; the upper part of the packing box is sealed by the wind shield, so that cold air is prevented from directly passing through a gap between the packing box and the fan, the cold air can be guaranteed to efficiently enter the inner side from the outer side of the packing box, and the breathing heat of fruits and vegetables is taken away; the humidity in the compartment is improved through the atomizing humidifier, and the weight loss and the phase reduction of fruits and vegetables caused by water loss are reduced.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of an apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a fruit and vegetable goods stacking position according to an embodiment of the invention.
FIG. 3 is a schematic flow diagram of a method of one embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
As shown in fig. 1, the present embodiment provides a mobile batch pre-cooling device for fruits and vegetables, including: the system comprises a precooling compartment body, and a differential pressure precooling system, a refrigerating system, a humidity regulating system and an atomization humidifier which are arranged in the precooling compartment body; the pressure difference precooling system comprises a centrifugal fan, an evaporator and an adjustable wind shield; the centrifugal fan and the evaporator are respectively arranged at the top of the precooling box body, the centrifugal fan is embedded in the middle of the evaporator, the air outlet of the centrifugal fan is arranged on the side face, the air inlet of the centrifugal fan is arranged below, the adjustable wind shield is positioned below the centrifugal fan, and the precooled fruits and vegetables are positioned below the adjustable wind shield. The refrigerating system is arranged at the front end of the precooling compartment body, and comprises: the system comprises a compressor, a condenser, an expansion valve, an axial flow fan, a high-pressure liquid storage device, a drying filter, a liquid sight glass, an electromagnetic valve and a ball valve; the atomization humidifier is arranged at the air outlet of the centrifugal fan
The device also comprises an electric control system; the differential pressure precooling system and the refrigerating system are both powered and electrically controlled by an electric control system; the humidity regulation system comprises: the fruit and vegetable precooling device comprises a first temperature and humidity sensor and a second temperature and humidity sensor, wherein the first temperature and humidity sensor is arranged in a precooled fruit and vegetable, and the second temperature and humidity sensor is arranged at an air outlet of a centrifugal fan.
As shown in fig. 2, according to the structure of the pre-cooling compartment, the loading of fruit and vegetable goods is as follows: the method comprises the steps of putting apples into a packaging box with vent holes after harvesting, stacking the packaging box on a logistics tray, and then conveying the packaging box to a pre-cooling box by a forklift, stacking the packaging box in the pre-cooling box into a U shape according to the requirement of a figure 1, stacking the packaging box on one side close to the inner wall of a front section, reserving an air channel in the middle, and enabling at least 20 cm air channels to flow out of two sides. The stacking height can reach the lower edge of the air cooler on the top of the pre-heater all the time; except the reserved air duct, goods can be completely stacked in the pre-cooling compartment body; according to the measurement and calculation of the size of a 40-foot container, the quantity of the single-time precooled fruit and vegetable goods can reach 8 tons, and the loading efficiency is greatly higher than that of the existing precooling equipment.
The start-up operation of the device is as follows: putting down wind shields on two sides of the precooling fan, and adjusting the wind shields to completely shield a gap between the packing box and the top fan; probes of the first temperature and humidity sensor are respectively placed in four packaging boxes (distributed as much as possible), the second temperature and humidity sensor is respectively suspended at outlets of four fans, a door of the precooling compartment is closed, and an electric control system is opened; and supplying power to the whole device, and starting a differential pressure precooling program by the differential pressure precooling system and the refrigerating system under the control of the electric control system.
The operation of the device is as follows: because the U-shaped stacking of the packing boxes and the box walls form a closed space with a hollow middle, after the centrifugal fan is started, air is sucked from the bottom and blown out from the side face, and negative pressure can be formed in a middle air duct (namely the inner side of the packing box), so that static pressure difference is formed between the outer side and the inner side of the packing box, cold air cooled by the evaporator can forcibly pass through the packing box from the outer side of the packing box due to the influence of the pressure difference, a high-efficiency air circulation system is formed, and the heat exchange and cooling of fruits in the packing box are quickly realized. When the humidity in the compartment detected by the second temperature and humidity sensor is lower than 80%, the humidifier is automatically started to humidify in an atomizing mode, and when the humidity of the fruits and vegetables detected by the second temperature and humidity sensor exceeds 80%, the humidifier stops running.
FIG. 3 is a schematic flow chart diagram of a method of one embodiment of the present invention. The execution main body in fig. 3 may be a mobile batch fruit and vegetable precooling device.
As shown in fig. 3, the method includes:
s1: starting an electric control system to electrify the precooling device, and starting a refrigeration and differential pressure precooling program;
s2: acquiring a temperature threshold value, a precooling temperature threshold value and a precooling time threshold value in the compartment of the fruits and vegetables;
s3: collecting the temperature of the fruits and vegetables, comparing the temperature with the temperature threshold value in the compartment, stopping refrigeration when the temperature in the compartment reaches the temperature threshold value in the compartment, and continuing to run a pressure difference precooling program;
s4: collecting the temperature of the fruits and vegetables and the running time of a differential pressure precooling program and comparing the running time with a precooling temperature threshold and a precooling time threshold: and stopping running the refrigeration and pressure difference precooling program when the temperature of the fruits and vegetables reaches a precooling temperature threshold or the running time reaches a precooling time threshold.
Optionally, as an embodiment of the present application, the method further includes:
acquiring a humidity threshold of the fruits and the vegetables;
collecting humidity in the compartment and humidity of fruits and vegetables and comparing with the humidity threshold value: when the humidity in the compartment is lower than a humidity threshold value, starting the humidifier; and when the humidity of the fruits and the vegetables exceeds the humidity threshold value, the humidifier stops running.
In order to facilitate understanding of the present invention, the principle of the mobile batch pre-cooling method for fruits and vegetables according to the present invention is further described below with reference to the operation process of the fruit and vegetable batch pre-cooling device in the embodiment.
Specifically, the mobile fruit and vegetable batch precooling method comprises the following steps:
(1) the mobile fruit and vegetable precooling device is transported to the location of precooled products through a container transport vehicle, and an electric control system of the mobile fruit and vegetable precooling device is connected with a power supply;
(2) loading the fruits and vegetables to be precooled into a standardized packaging box, punching the side surface of the packaging box, placing the packaging box into a precooling chamber, and reserving a return air duct according to the position of an air return port during stacking;
(3) adjusting the height of the wind shield to enable the wind shield to completely shield the gap at the upper part of the packing box;
(4) setting the temperature threshold value in the compartment of the fruits and vegetables to be 0 ℃, the precooling temperature threshold value to be 5 ℃, the precooling time threshold value to be 4 hours and the humidity threshold value to be 80 percent; pressing a start button, starting the refrigerating unit after delaying for 1 minute, and starting a centrifugal fan of precooling equipment after 30 seconds; because the U-shaped stacking of the packing boxes and the box walls form a closed space with a hollow middle, when the centrifugal fan is started, negative pressure can be formed in a middle air duct (namely the inner side of the packing box), so that static pressure difference is formed between the outer side and the inner side of the packing box, cold air cooled by the evaporator can forcibly pass through the packing box from the outer side of the packing box, an efficient air circulation system is formed, and heat exchange and cooling of fruits in the packing box are quickly realized. The temperature in the compartment is not lower than 0 ℃ so as to prevent the temperature of local fruits and vegetables from dropping too low to cause cold damage due to too low temperature.
(5) Collecting the temperature of the fruits and vegetables through a temperature and humidity sensor, comparing the temperature with a temperature threshold value of 0 ℃ in a compartment, stopping refrigeration when the temperature in the compartment reaches 0 ℃, and continuously operating a differential pressure precooling system; collecting the temperature of the fruits and vegetables and the running time of a differential pressure precooling program, and comparing the running time with a precooling temperature threshold value of 5 ℃ and a precooling time threshold value of 4 hours: and when the temperature of the fruits and vegetables reaches 5 ℃ or the running time reaches 4 hours, stopping running the refrigerating system and the pressure difference precooling system. Collecting humidity in the compartment and humidity of fruits and vegetables and comparing with the humidity threshold value of 80%: when the humidity in the compartment is lower than 80%, starting the humidifier; and when the humidity of the fruits and the vegetables exceeds 80%, stopping the operation of the humidifier. When the precooling time reaches the set value for 4 hours, the system stops running no matter whether the temperature of the fruits and vegetables is reduced to 5 ℃, because when the temperature of the fruits and vegetables cannot reach the final temperature for a long time, usually because a refrigerating system has a fault or an evaporator is frosted in a large quantity, the system is not required to be continuously operated at the moment, and the reason needs to be shut down and searched.
(6) When the average temperature of the temperature sensors 1-4 reaches 5 ℃, the equipment automatically stops running, and precooling is finished.
(7) After the pre-cooling is finished, quickly transferring the pre-cooled fruits and vegetables into a refrigerator car or a cold storage; the precooled van body can also be directly transported to a destination as a refrigerated container.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a portable fruit vegetables precooling apparatus in batches which characterized in that includes: the system comprises a precooling compartment body and a differential pressure precooling system arranged in the precooling compartment body; the pressure difference precooling system comprises a centrifugal fan, an evaporator and an adjustable wind shield; the centrifugal fan and the evaporator are respectively arranged at the top of the precooling box body, the centrifugal fan is embedded in the middle of the evaporator, the air outlet of the centrifugal fan is arranged on the side face, the air inlet of the centrifugal fan is arranged below, the adjustable wind shield is positioned below the centrifugal fan, and the precooled fruits and vegetables are positioned below the adjustable wind shield.
2. The mobile batch pre-cooling device for fruits and vegetables according to claim 1, wherein the device further comprises a refrigeration system disposed in the pre-cooling compartment body, and the refrigeration system is disposed at a front end of the pre-cooling compartment body, and the refrigeration system comprises: the system comprises a compressor, a condenser, an expansion valve, an axial flow fan, a high-pressure liquid storage device, a drying filter, a liquid viewing mirror, an electromagnetic valve and a ball valve.
3. The mobile batch pre-cooling device for fruits and vegetables according to claim 2, further comprising an electric control system; and the differential pressure precooling system and the refrigerating system are both powered and electrically controlled by an electric control system.
4. The mobile batch pre-cooling device for fruits and vegetables according to claim 1, further comprising a humidity control system; the humidity regulation system comprises: the fruit and vegetable precooling device comprises a first temperature and humidity sensor and a second temperature and humidity sensor, wherein the first temperature and humidity sensor is arranged in a precooled fruit and vegetable, and the second temperature and humidity sensor is arranged at an air outlet of a centrifugal fan.
5. The mobile batch precooling apparatus for fruits and vegetables as claimed in claim 1, further comprising an atomizing humidifier disposed at the air outlet of the centrifugal fan.
6. A mobile fruit and vegetable batch precooling method is characterized by comprising the following steps:
s1: starting an electric control system to electrify the precooling device, and starting a refrigeration and differential pressure precooling program;
s2: acquiring a temperature threshold value, a precooling temperature threshold value and a precooling time threshold value in the compartment of the fruits and vegetables;
s3: collecting the temperature of the fruits and vegetables, comparing the temperature with the temperature threshold value in the compartment, stopping refrigeration when the temperature in the compartment reaches the temperature threshold value in the compartment, and continuing to run a pressure difference precooling program;
s4: collecting the temperature of the fruits and vegetables and the running time of a differential pressure precooling program and comparing the running time with a precooling temperature threshold and a precooling time threshold: and stopping running the refrigeration and pressure difference precooling program when the temperature of the fruits and vegetables reaches a precooling temperature threshold or the running time reaches a precooling time threshold.
7. The method for mobile batch pre-cooling of fruits and vegetables according to claim 6, further comprising:
acquiring a humidity threshold of the fruits and the vegetables;
collecting humidity in the compartment and humidity of fruits and vegetables and comparing with the humidity threshold value: when the humidity in the compartment is lower than a humidity threshold value, starting the humidifier; and when the humidity of the fruits and the vegetables exceeds the humidity threshold value, the humidifier stops running.
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| CN202010219693.9A CN111248254A (en) | 2020-03-25 | 2020-03-25 | Mobile fruit and vegetable batch precooling device and method |
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| CN202010219693.9A CN111248254A (en) | 2020-03-25 | 2020-03-25 | Mobile fruit and vegetable batch precooling device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858773A (en) * | 2021-01-08 | 2021-05-28 | 宁夏塞上阳光太阳能有限公司 | Method for calculating cold storage fruit and vegetable reserves based on fruit and vegetable respiration heat quantity |
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