CN116878202A - Circulation mobile cut flower pressure difference precooling device - Google Patents
Circulation mobile cut flower pressure difference precooling device Download PDFInfo
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- CN116878202A CN116878202A CN202311056735.1A CN202311056735A CN116878202A CN 116878202 A CN116878202 A CN 116878202A CN 202311056735 A CN202311056735 A CN 202311056735A CN 116878202 A CN116878202 A CN 116878202A
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- precooling
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- temperature
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- 238000005057 refrigeration Methods 0.000 claims abstract description 37
- 238000001816 cooling Methods 0.000 claims description 161
- 238000004806 packaging method and process Methods 0.000 claims description 55
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- 238000000034 method Methods 0.000 claims description 17
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- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D13/00—Stationary devices, e.g. cold-rooms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/006—General constructional features for mounting refrigerating machinery components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention relates to a circulating mobile cut-flower differential pressure precooling device which comprises a refrigeration house, a precooling device for loading cut-flowers and a control module connected with an air cooler of the precooling device. The control module is configured to: determining a circulation path and/or a travel time of the precooling apparatus; and controlling the air cooler and the precooling device to perform gradient precooling according to the set parameters. By setting the circulation path, workers do not need to enter the refrigeration house, the refrigeration house is ensured to be in a relatively closed space under the condition that the workers do not need to work in the refrigeration house in a low-temperature environment, and external polluting objects are prevented from entering the refrigeration house while the cold air in the refrigeration house is protected, so that the flowers are polluted during precooling. The gradient precooling device ensures that cut flowers are not frosted due to excessive precooling under the condition of further accelerating the precooling speed.
Description
The original foundation of the divisional application is a patent application with the application number of CN202310464339.6, the application date of 2023, 04 and 27, and the name of the patent application is a movable cut flower differential pressure precooling system and method.
Technical Field
The invention relates to the technical field of flower treatment and cut flower preservation, in particular to a circulating mobile cut flower differential pressure precooling device.
Background
After the cut flowers are harvested, nutrient absorption of roots is lost, but nutrient consumption of the cut flowers is continued. Respiration of cut flowers becomes a main way of nutrient consumption, and simultaneously, ornamental time and physiological state of cut flowers after harvest are closely related to nutrient content and respiration metabolism of cut flowers. Temperature is a determining factor in respiratory metabolism of cut flowers. The higher the temperature, the stronger the respiratory metabolism and the shorter the ornamental period of cut flowers. The cut flowers can carry a large amount of field heat after being harvested from a greenhouse, the field heat can enable the cut flowers to be at a higher temperature, the breathing effect of the cut flowers is promoted, the aging of the cut flowers is further accelerated, and the ornamental value and the economic value of the cut flowers are reduced. The field heat of cutting flowers is removed, the basal metabolism of the cutting flowers is reduced, and the aging of the cutting flowers is delayed. At present, a precooling mode is adopted to quickly remove field heat of cut flowers, the temperature of the cut flowers is reduced to a refrigerating temperature, and bacteria breeding of the cut flowers can be restrained through precooling treatment, so that deterioration of the cut flowers is prevented, and the bottle inserting service life is prolonged.
The prior art CN 105901117a discloses a fruit and vegetable double-temperature-area differential pressure precooling device and method, which comprises a box body, wherein two heat-insulating structure box bodies and a maintenance structure box body are arranged in one box body, two heat-insulating structure box bodies are respectively provided with two different sets of precooling devices, two different sets of refrigerating systems are respectively provided according to the different structures of the two sets of precooling devices, and the two sets of refrigerating systems respectively supply cold air to the two heat-insulating structure box bodies. Simultaneously, all be equipped with the fan in two refrigerating systems, be equipped with the converter on the motor of fan, through maintaining the wireless converter that sets up in the structure box, remote control ware remote control the rotational speed of motor is regulated and control to the converter, and then adjusts the rotational speed of fan, finally reaches the corresponding precooling temperature of various fruits and vegetables in the different thermal-insulated structure railway carriage or compartment and provides different cooling capacity, still reaches the purpose of precooling temperature simultaneously.
However, cut flowers have their own specificity as compared to other agricultural products, and the value of cut flowers is mainly ornamental. In order to maximize the ornamental value and maintain the ornamental value of the cut flowers after picking, the cut flowers are required to be subjected to a series of post-picking treatment measures such as grading, packaging and the like. In order to avoid possible mechanical damage and excessive water loss of cut flowers in postharvest circulation and damage to ornamental value of cut flowers, cut flowers are usually protected by adopting a combination of a strict inner package and a strict outer package. Meanwhile, in order to facilitate the postharvest treatment operation and improve the treatment efficiency, the treatment is usually carried out at normal temperature. This allows cut flowers with higher temperatures to be tightly packed, making it difficult to cool the cut flowers after harvesting. In a packing box with very limited space, because of the higher temperature of the cut flowers, heat generated by respiratory metabolism is accumulated in the packing box rapidly, so that the temperature in the packing box rises again, and respiratory metabolism of the cut flowers is continuously accelerated, and a malignant cycle of high temperature and high respiratory metabolism is formed. There is therefore a need to explore devices and methods suitable for rapid precooling of packaged cut flowers.
At present, the cut flowers industry in China mainly adopts cold storage precooling, so that the packaged cut flowers are difficult to quickly precool and cool, and the improvement of a differential pressure precooling technology suitable for quickly cooling the packaged cut flowers is less.
The existing refrigeration house precooling mode lacks of circulating synchronous precooling for a plurality of packaged cut flowers, and usually a worker is required to push the precooling device out of the refrigeration house or push the precooling device into the refrigeration house. Workers need to work in a refrigeration house in a low-temperature environment, and meanwhile, the high-frequency carrying process can also lead to the reduction of the internal precooling efficiency and the entering of external pollutant objects into the refrigeration house, so that the pollution to the flowers is caused during precooling.
Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, since the applicant has studied a lot of documents and patents while making the present invention, the text is not limited to details and contents of all but it is by no means the present invention does not have these prior art features, but the present invention has all the prior art features, and the applicant remains in the background art to which the right of the related prior art is added.
Disclosure of Invention
Aiming at the defects of the technical scheme proposed by the prior art, the invention relates to a circulating mobile cut flower differential pressure precooling device which comprises a refrigeration house. The device also comprises a precooling device for loading cut flowers and a control module which is arranged on the precooling device and connected with an air cooler of the precooling device. The control module is configured to: determining a travel time of the circulation path and/or the pre-cooling device; and controlling the air cooler and the precooling device to perform gradient precooling according to the set parameters.
According to a preferred embodiment, the pre-cooling device is automatically operated according to a preset law along a circulation path to a preset position in the freezer. Preferably, the static pressure box group of the pre-cooling device and the air cooler are in the same vertical direction; the plurality of precooling devices sequentially and alternately enter the refrigeration house and are positioned at the preset position in the refrigeration house.
According to a preferred embodiment, the pre-cooling device is located inside the freezer forming a circulating air flow that passes through the pre-cooling device loaded with cut flowers and pre-cools the cut flowers inside the pre-cooling device. Preferably, the motion of the plurality of pre-cooling devices on the circulation path is driven by the pre-cooling devices or is driven by the circulation path cooperatively.
According to a preferred embodiment, the pre-cooling device is driven by a drive device installed inside the pre-cooling device, or the pre-cooling device on the circulation path is fixedly installed with the track of the circulation path at a specific position, in case the track or the road surface of the circulation path is stationary.
According to a preferred embodiment, the control module controls the temperature and the rate of the first directed air flow of the air cooler into the pre-cooling device based on different phases of the cut-flower temperature.
According to a preferred embodiment, the step of controlling, by the control module, the air cooler and the pre-cooling device to perform gradient pre-cooling according to the set parameters at least includes: and acquiring the pre-cooling final temperature, the initial temperature and the preset speed set on a control panel of the control module to control the pre-cooling parameters and the pre-cooling process of the pre-cooling device and/or the air cooler.
According to a preferred embodiment, the device further comprises a loading box group formed by stacking a plurality of cut flower packaging boxes. Preferably, the step of controlling the air cooler and the pre-cooling device to perform gradient pre-cooling by the control module according to the set parameters further includes: and adjusting the stage of gradient precooling of the circulating air flow under the pressure difference according to the real-time temperature in the cut flower packaging box.
According to a preferred embodiment, the control module is further configured to: and controlling the progress stage of the gradient precooling by calculating the heat change.
According to a preferred embodiment, the step of controlling the progress phase of the gradient pre-cooling by calculating the heat variation comprises at least: calculating the heat Q required to be released from the initial temperature to the pre-cooling temperature of the cut flowers to be pre-cooled according to the pre-cooling final temperature, the initial temperature and the average specific heat capacity of the cut flowers and the box body space inside the cut flower packaging box 1 。
According to a preferred embodiment, the step of controlling the progress phase of the gradient pre-cooling by calculating the heat variation further comprises: acquiring the temperature of the first directional air flow entering the cut flower packaging box and the temperature of the first directional air flow exiting the cut flower packaging box; calculating the heat quantity Q absorbed by the first directional airflow 2 The method comprises the steps of carrying out a first treatment on the surface of the And controlling the proceeding stage of the gradient precooling according to the heat change.
Aiming at the defects of the technical scheme proposed by the prior art, the application provides a movable cut flower differential pressure precooling system, which comprises a refrigeration house, wherein a precooling device for loading cut flowers can be arranged in the refrigeration house, and the refrigeration house can form circulating air flow under the synergistic effect of the precooling device, wherein the precooling device comprises a water tank layer, a component mounting layer, a flow control device, a loading box group and a static pressure box group; the circulating air flow is limited by an air cooler arranged at the top of the refrigeration house and a static pressure box group carried by the precooling device, and the static pressure box group can enable the external space and the internal space of the precooling device to form pressure difference; the circulating air flow comprises a first directional air flow flowing out of the air cooler and flowing into the precooling device under the action of pressure difference and a second directional air flow flowing out of the static pressure box group and flowing into the air cooler. By using the differential pressure precooling device in the refrigeration house, the cooling rate of the cut flowers after packaging is improved, the cut flowers are rapidly reduced by Wen Suoxian, and the fresh-keeping period of the cut flowers is prolonged.
Preferably, the pre-cooling device can automatically operate to a preset position in the refrigerator according to a preset rule in a circulating path mode, wherein the preset position is that the static pressure box group of the pre-cooling device and the air cooler are in the same vertical direction; the preset rule is that a plurality of precooling devices alternately enter the refrigeration house in sequence and are positioned at preset positions in the refrigeration house.
Preferably, the component mounting layer is at least provided with an axial flow fan which enables the low-pressure space of the static pressure box group to be communicated with the outside, and the component mounting layer is also provided with a control module capable of controlling the axial flow fan.
Preferably, an axial flow fan which enables the low-pressure space of the static pressure box group to be communicated with the outside is at least installed on a component installation layer at the top of the precooling device, a control module capable of controlling the axial flow fan is also installed in the component installation layer, and the static pressure box group is arranged on the bottom surface of the component installation layer in a fitting mode.
Preferably, the top of the pre-cooling device is further provided with the water tank layer, a flow control device which is configured in parallel with the side surface of the pre-cooling device is arranged between the water tank layer and the bottom surface of the pre-cooling device and is far away from the end part of the static pressure tank group, and the flow control device is limited by a first partition plate and a second partition plate of the pre-cooling device.
Preferably, a water tank layer and a component mounting layer which are attached to each other are arranged on the top of the pre-cooling device, and the low-pressure space of the static pressure tank group is defined by the bottom surface of the component mounting layer and a plurality of inner walls of the pre-cooling device. The shell layer of the precooling device is formed by assembling a high-heat-conductivity alloy panel and a keel. On one hand, through the metal characteristics and the structure of the alloy panel and the keels, the pressure difference precooling device has a firm and reliable structure, meanwhile, corrosion such as rust is avoided, and the service life of equipment is prolonged. On the other hand, through the quick heat conduction characteristic of high heat conduction alloy panel, utilize the cold environment of freezer to cool down to pressure differential precooling apparatus, including the water in the pressure differential precooling apparatus upper portion water tank, make the atomized water of humidifier be in low temperature, help the precooling cut flower to cool down. And meanwhile, the air which flows through the cut flowers and is heated is cooled again after passing through the box body of the differential pressure precooling device by utilizing the low temperature of the static pressure box group of the differential pressure precooling device.
Preferably, a third partition board parallel to the second partition board is configured at the joint of the water tank layer and the component mounting layer, a first air supply port, a second air supply port and a third air supply port are respectively formed in the first partition board, the second partition board and the third partition board, and an air speed sensor is arranged at the second air supply port of the second partition board.
Preferably, a plurality of water pipes connected with the water tank layer are arranged inside the flow control device, a humidifier which is configured inside the flow control device and used for humidifying the gas flowing through the flow control device is connected with the water pipes, and a first temperature and humidity sensor is arranged at the air flow outlet of the flow control device. Air entering the cut flower packaging box is humidified through the humidifier, water loss in the precooling process due to difference of air humidity and cut flower water content of the cut flowers is avoided, and meanwhile, the circulating air is cooled for the second time by utilizing high specific heat capacity of water.
Preferably, a loading box group for loading cut flowers is arranged between the second partition plate and the third partition plate, and the loading box group is formed by stacking a plurality of cut flower packaging boxes.
Preferably, the two ends of the cut flower packaging box are respectively provided with an air inlet and an air outlet, the air inlet is communicated with the second air supply opening of the second partition board, and the air outlet is communicated with the third air supply opening of the third partition board.
Preferably, a roller shutter motor is arranged between the loading box group and the water tank layer, and the roller shutter motor can wind up and down a sealing canvas for closing a gap between the cut flower packaging boxes based on a control signal of the control module.
The application also provides a movable cut flower differential pressure precooling method, which comprises the steps of providing a refrigeration house, placing a precooling device for loading cut flowers into the refrigeration house capable of forming circulating air flow, and enabling the circulating air flow to rapidly pass through the precooling device for loading cut flowers and rapidly precool the cut flowers in the precooling device;
the circulating air flow is limited by an air cooler arranged at the top of the refrigeration house and a static pressure box group carried by the precooling device, and the static pressure box group can enable the external space and the internal space of the precooling device to form pressure difference;
the circulating air flow comprises a first directional air flow flowing out of the air cooler and flowing into the precooling device under the action of pressure difference and a second directional air flow flowing out of the static pressure box group and flowing into the air cooler.
Drawings
FIG. 1 is a simplified overall schematic of a mobile cut-flower differential pressure precooling system of the present application;
fig. 2 is a simplified overall structure schematic of the precooling apparatus of the present application;
fig. 3 is a simplified cross-sectional schematic view of a precooling apparatus of the present application;
fig. 4 is a simplified schematic of the circulation path of the present application.
List of reference numerals
100: a cold storage; 200: a precooling device; 300: a control module; 101: an air cooler; 102: an entry end; 103: an outlet end; 104: a circulation path; 105: a loading area; 106: an unloading zone; 110: a first directed airflow; 120: a second directed airflow; 210: a water tank layer; 220: a component mounting layer; 230: a flow control device; 240: a loading box group; 250: a static pressure box group; 201: a shell layer; 202: a pulley; 203: a tray; 211: a water pipe; 212: a roller shutter motor; 213: sealing canvas; 221: an axial flow fan; 231: a first separator; 232: a first air supply port; 233: a first temperature and humidity sensor; 234: a second separator; 235: a second air supply port; 236: a wind speed sensor; 241: cutting flower and packaging; 242: an air inlet; 243: an air outlet; 251: a third separator; 252: a third air supply port; 253: a second temperature and humidity sensor; 254: a third temperature and humidity sensor; 301: and a control panel.
Detailed Description
The present application will be described in detail with reference to fig. 1 to 4.
Example 1
The embodiment provides a movable cut flower differential pressure precooling system, which comprises a refrigeration house 100, wherein circulating air flow can be formed in the refrigeration house 100, and can pass through a precooling device 200 for loading cut flowers and precool the cut flowers in the precooling device 200; the circulating air flow is defined by an air cooler 101 arranged at the top of the refrigeration house 100 and a static pressure box group 250 mounted on the precooling device 200, and the static pressure box group 250 can form a pressure difference between the external space and the internal space of the precooling device 200; the circulating air flow includes a first directed air flow 110 exiting air cooler 101 and flowing into precooling apparatus 200 under pressure differential and a second directed air flow 120 exiting static pressure tank set 250 and flowing into air cooler 101. By using the differential pressure precooling device 200 in the refrigeration house 100, the flow velocity of cold air between cut flowers after packaging is improved, so that the cut flowers and the cold air can quickly exchange heat by convection, the cooling rate of the cut flowers is improved, the cut flowers can be quickly reduced by Wen Suoxian, and the fresh-keeping period of the cut flowers can be prolonged.
Preferably, according to the simplified schematic structure of the mobile cut flower differential pressure precooling system in a preferred embodiment of the present application shown in fig. 1, the refrigerator 100 of the present application may be designed as a regular box-type structure, and particularly, a rectangular box-type structure may be selected. The longitudinal direction of the refrigerator 100 is parallel to the ground, so that one of four sides of the refrigerator 100 in the longitudinal direction serves as a bottom surface of the refrigerator 100. The side opposite to the bottom serves as the top of the refrigerator 100, and the remaining four sides serve as the walls of the cold zone. One or more walls of the enclosure are provided with doors which can allow the pre-cooling device 200 to enter and exit. Specifically, the top surface of the refrigerator 100 is sequentially provided with a surface layer, a moisture-proof layer, a top plate and a heat-insulating layer from bottom to top, and the enclosing wall of the refrigerator 100 sequentially comprises a wall body, a heat-insulating layer, a moisture-proof layer and a surface layer from outside to inside. The top surface of the refrigeration house 100 and the heat insulation layers of the surrounding walls adopt heat insulation panels. The bottom surface of the refrigeration house 100 is composed of a uniform temperature layer, a moisture-proof layer and a heat preservation layer from bottom to top.
Preferably, the air cooler 101 in the refrigerator 100 is installed at the intersection of one of the wall surfaces and the top surface of the refrigerator 100. When the precooling apparatus 200 is placed in the refrigerator 100, the static pressure tank group 250 in the precooling apparatus 200 is partially placed below the air cooler 101.
Preferably, according to the simplified schematic structure of the pre-cooling device 200 shown in fig. 2, the pre-cooling device 200 comprises at least a tank-type housing. The interior of the housing is divided into at least five parts, specifically including a water tank layer 210 part, a component mounting layer 220 part, a flow control device 230 part, a loading tank set 240 part and a static pressure tank set 250 part, wherein the water tank layer 210 part and the component mounting layer 220 part are positioned on the top layer of the housing and bisect the top surface. The flow control device 230 part, the loading tank group 240 part, and the static pressure tank group 250 part are arranged in this order from the gas flow direction below the water tank layer 210 part and the component mounting layer 220 part.
Preferably, shell 201 of precooling apparatus 200 is assembled from high-heat-conductivity alloy panels and keels. On the one hand, through the metal characteristics and the structure of the alloy panel and the keels, the pressure difference precooling device 200 is firm and reliable in structure, meanwhile, corrosion such as rust is avoided, and the service life of equipment is prolonged. On the other hand, by the rapid heat conduction characteristic of the high heat conduction alloy panel, the pressure difference precooling device 200 is cooled by utilizing the cold environment of the cold storage 100, and water in the water tank at the upper part of the pressure difference precooling device 200 is used for enabling the water atomized by the humidifier to be at low temperature and helping to cool the precooled cut flowers. Meanwhile, the air which flows through the cut flowers and is heated is cooled again after passing through the box body of the differential pressure precooling device 200 by utilizing the low temperature of the static pressure box group 250 of the differential pressure precooling device 200.
Preferably, a plurality of pulleys 202 are installed below the bottom end of the shell 201 of the pre-cooling device 200, and in the case that the pre-cooling device 200 is designed to be of a box-type structure, the pulleys 202 are preferably installed in four, and are respectively located at four corners of the bottom surface, so that the pre-cooling device 200 can be conveniently pushed into and out of the refrigerator 100.
Preferably, the top of the pre-cooling device 200 is provided with a water tank layer 210 and a component mounting layer 220 attached to each other, and the low-pressure space of the static pressure tank group 250 is defined by the bottom surface of the component mounting layer 220 and several inner walls of the pre-cooling device 200.
Preferably, according to the A-A section schematic view of the pre-cooling apparatus 200 shown in fig. 3, at least three partitions are disposed inside the shell 201 of the pre-cooling apparatus 200 and below the water tank layer 210 and the assembly mounting layer 220, and the first partition 231, the second partition 234 and the third partition 251 are disposed in order from the gas flowing direction, wherein the first partition 231 also serves as one side surface of the shell 201, the first directional gas flow 110 of the circulating gas flow in the external space of the pre-cooling apparatus 200 enters the pre-cooling apparatus 200 from the first partition 231, the third partition 251 is disposed at the joint of the water tank layer 210 and the assembly mounting layer 220, the first partition 231, the second partition 234 and the third partition 251 are disposed parallel to the side surface of the pre-cooling apparatus 200, and the first partition 231, the second partition 234 and the third partition 251 are respectively provided with a first air supply port 232, a second air supply port 235 and a third air supply port 252, and a wind speed sensor 236 is disposed at the second air supply port 235 of the second partition 234.
Preferably, the first air supply port 232, the second air supply port 235 and the third air supply port 252 correspond to each other, in other words, the number of the first air supply port 232, the second air supply port 235 and the third air supply port 252 is equivalent, and the height position and the width position of each corresponding first air supply port 232, second air supply port 235 and third air supply port 252 on the partition plate are the same.
Preferably, the first partition 231, the second partition 234 and the third partition 251 divide at least the space below the water tank layer 210 and the assembly mounting layer 220 inside the shell 201 of the precooling apparatus 200 into three areas, which correspond to the aforementioned flow control device 230 portion, loading tank group 240 portion and static pressure tank group 250 portion, respectively.
Preferably, at least the axial flow fan 221 that communicates the low-pressure space of the static pressure tank group 250 with the outside is installed in the assembly installation layer 220, and the control module 300 capable of controlling the axial flow fan 221 is also installed in the assembly installation layer 220. The axial flow fan 221 is arranged at the end part of the assembly mounting layer 220 far away from the water tank layer 210, the static pressure box group 250 is arranged in a space defined by the third partition plate 251 in the shell and the side surface of the shell, the distance from the air flow flowing through the cut flower packaging box 241 to the axial flow fan 221 is prolonged by utilizing the low-pressure space of the static pressure box group 250, the air flow velocity uniformity of the cut flowers flowing through different parts of the cut flower packaging box 241 is improved, and the cut flowers at different parts of the cut flower packaging box are uniformly precooled. The air flow inlet of the low-pressure space of the static pressure box group 250 is a third air supply opening 252 formed in the third partition plate 251, and the opening part and the size of the third air supply opening 252 correspond to the air outlet hole of the cut flower packaging box 241. The third air supply port 252 of the third partition plate 251 prevents air from flowing into the static pressure box group 250 from the gap of the cut-flower packaging box 241, reduces the pressure difference between the external space and the internal space of the precooling apparatus 200 generated by the operation of the axial flow fan 221, and further avoids reducing the air flow velocity flowing through the cut-flower packaging box 241, and reduces the cut-flower precooling rate and the precooling energy consumption effectiveness.
Preferably, the air flow outlet of the low-pressure space of the static pressure box group 250 is an air flow inlet of the axial flow fan 221, when the axial flow fan 221 works, air in the low-pressure space can be pumped out, and the air enters the air cooler 101 again from the air flow inlet of the air cooler 101 for refrigeration, the air flow is the second directional air flow 120, and the second directional air flow 120 enters from the air cooler 101 and flows out from the air cooler 101 to be converted into the first directional air flow 110. In other words, the first directional airflow 110 is a pre-precooling airflow that does not exchange heat with the cut flowers to be precooled, and the second directional airflow 120 is a pre-precooled airflow that has exchanged heat with the cut flowers to be precooled, and typically, the temperature of the second directional airflow 120 is higher than that of the first directional airflow 110.
Preferably, a second temperature and humidity sensor 253 is installed at the air inlet of the axial flow fan 221, and the second temperature and humidity sensor 253 is used for detecting the temperature and humidity of the second directional air flow 120 after heat exchange.
Preferably, the control module 300 is also installed inside the assembly installation layer 220, and the control module 300 controls the working efficiency of the axial flow fan 221 in a wireless transmission manner according to the air flow rate data of the air inlet of the cut flower packaging box 241 fed back by the air speed sensor 236 installed at the second air supply outlet 235 of the second partition 234, so that the air flow rate of the air inlet of the cut flower packaging box 241 is within 2.5 m/s. Meanwhile, the control module 300 automatically regulates and controls the rotation speed of the axial flow fan 221 in a wireless transmission mode according to the temperature of the second directional airflow 120 which flows through the cut flower packaging box 241 and is subjected to heat convection after being monitored by the second temperature and humidity sensor 253 arranged at the airflow inlet of the axial flow fan 221. After the temperature reaches 1/2, 1/4 and 1/8 of the initial temperature, the control module 300 controls the rotation speed of the axial flow fan 221 to gradually decrease until the temperature is consistent with the final temperature of precooling, and when the precooling is judged to be finished, the air flow rate of the air inlet of the cut-flower packaging box 241 is regulated to be Om/s.
Preferably, a flow control device 230 is disposed between the water tank layer 210 and the bottom surface of the pre-cooling device 200 and at an end far from the static pressure tank group 250, and is disposed parallel to a side surface of the pre-cooling device 200, and the flow control device 230 is defined by a first partition 231 and a second partition 234 of the pre-cooling device 200.
Preferably, a plurality of water pipes 211 connected with the water tank layer 210 are arranged inside the flow control device 230, a humidifier configured inside the flow control device 230 and used for humidifying the gas flowing through the flow control device 230 is connected with the water pipes 211, and a first temperature and humidity sensor 233 is arranged at the air flow outlet of the flow control device 230. Air entering the cut flower packaging box 241 is humidified through the humidifier, water loss in the precooling process due to difference of air humidity and cut flower water content is avoided, and meanwhile, the circulating air is cooled for the second time by utilizing high specific heat capacity of water.
Preferably, the control module 300 also automatically controls the humidifier inside the flow control device 230 to humidify the first directional airflow 110 flowing into the pre-cooling device 200 in a wireless transmission manner. The module is informed to automatically control the humidifier to humidify the first directional airflow 110 by the air humidity data fed back by the first temperature and humidity sensor 233 arranged at the airflow outlet of the flow control device 230, humidification is started when precooling is started, humidification is stopped when precooling is finished, and the automatic control of the humidification amount needs to enable the air humidity of the air inlet to be stabilized between 85% and 95%. The control module 300 monitors the precooling process of the cut flowers in real time through the wind speed monitoring probes at the first temperature and humidity sensor 233 and the second air supply opening 235 of the second partition 234, adjusts the switch of the humidifier in the flow control device 230 and the working power of the low-pressure air axial flow fan 221 for controlling the static pressure box group 250 based on the precooling process, and saves precooling energy consumption while realizing rapid cooling of the cut flowers.
Preferably, a loading box group 240 for loading cut flowers is arranged between the second partition 234 and the third partition 251, and the loading box group 240 is formed by stacking a plurality of cut flower packaging boxes 241.
Preferably, two ends of the cut-flower packaging box 241 are respectively provided with an air inlet 242 and an air outlet 243, the air inlet 242 is communicated with the second air supply opening 235 of the second partition 234, and the air outlet 243 is communicated with the third air supply opening 252 of the third partition 251. During precooling, the cut flower packaging boxes 241 packaged with cut flowers to be precooled are orderly stacked on the tray 203 at the bottom of the loading box group 240, under the condition that the cut flower packaging boxes 241 are correctly stacked, the air inlets 242 of the cut flower packaging boxes 241 are overlapped with the second air inlets 235 of the second partition plates 234, the air outlets 243 of the cut flower packaging boxes 241 are overlapped with the third air inlets 252 of the third partition plates 251, so that air flow can fully enter the cut flower packaging boxes 241, air flow is limited to flow into gaps among the cut flower packaging boxes 241 from the air inlet direction through the second air inlets 235 of the second partition plates 234 and the air inlets 242 of the cut flower packaging boxes 241, invalid work is avoided, and the static pressure of the first directional air flow 110 flowing into the precooling device 200 is reduced by the first air inlets 232 of the first partition plates 231, the dynamic pressure of the first directional air flow 110 of an external space is improved, and the cold air flow rate flowing through the cut flower packaging boxes 241 is further improved. A humidifier is further installed in the flow control device 230, and the humidifier is connected with the upper water tank layer 210 through a water pipe 211. The first directional air flow 110 entering the cut flower packaging box 241 is humidified through the humidifier, so that the water loss in the precooling process caused by the difference of the air humidity and the cut flower water content of the cut flowers is avoided, and meanwhile, the circulating air is cooled for the second time by utilizing the high specific heat capacity of water.
Preferably, a roller shutter motor 212 is provided between the loading bin set 240 and the water tank layer 210, and the roller shutter motor 212 is capable of winding up and down the sealing canvas 213 for closing the gap between the cut flower packing boxes 241 based on the control signal of the control module 300.
Preferably, the shutter motor 212 is located under the water tank layer 210, and winds up the sealing canvas 213 by rotating shafts provided in parallel with the direction of the air flow passing through the inside of the pre-cooling apparatus 200 and at the front and rear ends of the pre-cooling apparatus 200. After the sealing canvas 213 is put down, gaps between the flow control device 230 and the loading box group 240 and gaps between the loading box group 240 and the static pressure box group 250 can be completely sealed, so that air flow is limited to flow into the low-pressure space of the static pressure box group 250 through the gaps between the cut flower packaging boxes 241, and the air flow is limited to flow through the gaps between the cut flower packaging boxes 241 by matching with the second partition plate 234 and the second air supply opening 235 and the third partition plate 251 and the third air supply opening 252, so that the effectiveness and the precooling speed of energy sources are improved.
Example 2
The embodiment is improved and supplemented on the basis of embodiment 1, and repeated contents are not repeated.
The embodiment also provides a movable cut-flower differential pressure precooling method, which comprises the steps of providing a refrigeration house 100, placing a precooling device 200 for loading cut flowers into the refrigeration house 100 capable of forming circulating air flow, and enabling the circulating air flow to pass through the precooling device 200 for loading cut flowers and precool the cut flowers in the precooling device 200;
The circulating air flow is defined by an air cooler 101 arranged at the top of the refrigeration house 100 and a static pressure box group 250 mounted on the precooling device 200, and the static pressure box group 250 can form a pressure difference between the external space and the internal space of the precooling device 200;
the circulating air flow includes a first directed air flow 110 exiting air cooler 101 and flowing into precooling apparatus 200 under pressure differential and a second directed air flow 120 exiting static pressure tank set 250 and flowing into air cooler 101.
Preferably, the pre-cooling device 200 of the present application may be configured to be mobile, and when the pre-cooling device 200 of the present application is used for pre-cooling, the following steps may be performed:
step a: before precooling, the precooling device 200 is placed in the refrigerator 100, and under the air cooler 101, the air outlet 243 of the axial flow fan 221 of the precooling device 200 is opposite to the air cooler 101, so that the second directional air flow 120 sucked out by the axial flow fan 221 and subjected to heat convection with the cut flowers is directly discharged to the air cooler 101, and the air flows through the air cooler 101 to be cooled rapidly and sufficiently, so that a new first directional air flow 110 is formed, and the novel first directional air flow is used for differential pressure precooling of the cut flowers and improves the precooling rate of the cut flowers.
Step b: the cut flowers to be precooled are alternately arranged in the cut flower packaging box 241, so that at least more than 5cm buffer space is reserved between the flower heads of the cut flowers and the air inlets 242 and the air outlets 243 at the two ends of the cut flower packaging box 241, and after the air flow enters the cut flower packaging box 241, the air flow is uniformly distributed in the buffer space, and the flow velocity of cold air for carrying out convection heat exchange with cut flowers at different positions in the precooled cut flower packaging box 241 is consistent. The cut flower packaging boxes 241 with cut flower packaging are orderly stacked on the tray 203, and gaps are not reserved among the cut flower packaging boxes 241 to form the precooling device 200.
Step c: the loading box group 240 is pushed into the space between the flow control device 230 and the static pressure box group 250 by using a forklift, specifically, the space between the second partition 234 and the third partition 251, and the air inlet 242 and the air outlet 243 in front of and behind the cut flower packaging box 241 are respectively aligned with the second air outlet 235 of the second partition 234 and the third air outlet 252 of the third partition 251.
Step d: the shutter motor 212 is controlled to put down the sealing canvas 213, and gaps between the cut flower packaging box 241, which is completely sealed except for the air inlet 242 and the air outlet 243, and the flow control device 230 and the static pressure box group 250 are closed by the sealing canvas 213.
Step e: the control panel 301 of the control module 300 is provided with the cut flower pre-cooling final temperature of the control module 300 of the differential pressure pre-cooling device 200, and the pre-cooling final temperature is consistent with the optimal storage temperature of different cut flowers.
Step f: the control module 300 of the differential pressure precooling apparatus 200 is started to perform cut flower differential pressure precooling.
Step g: after the pre-cooling is finished, the control module 300 automatically controls the roller shutter motor 212 to roll up the sealing canvas 213. Then, the precooled cut flower precooling device 200 is moved out, and the cut flowers are moved to the refrigeration house 100 to be stored at low temperature, and the cut flowers are precooled by the next precooling device 200.
Preferably, the pre-cooling device 200 is capable of automatically operating to a preset position within the freezer 100 according to a preset law in the manner of the circulation path 104.
Preferably, the pre-cooling device 200 can automatically operate to a preset position in the refrigerator 100 according to a preset rule in a circulation path 104, where the preset position is that the static pressure box group 250 of the pre-cooling device 200 and the air cooler 101 are in the same vertical direction; the preset rule means that the plurality of pre-cooling devices 200 sequentially and alternately enter the refrigerator 100 and are located at preset positions in the refrigerator 100.
In other words, the preset position means that the axial flow fan 221 of the static pressure tank group 250 of the pre-cooling apparatus 200 needs to be located at the bottom of the air cooler 101 in the refrigerator 100; the preset rule refers to that when a single air cooler 101 is configured, only one pre-cooling device 200 is introduced into the refrigerator 100, so as to avoid the problem that the air flow is disturbed due to the plurality of low-pressure spaces of the pre-cooling device 200, and the first directional air flow 110 and the second directional air flow 120 are unstable, and the cold and hot air flows are mixed with each other.
Preferably, the circulation path 104 is a path capable of communicating the inlet end 102 and the outlet end 103 of the refrigerator 100, that is, a single precooling apparatus 200 can enter the refrigerator 100 from the inlet end 102, leave the refrigerator 100 from the outlet end 103 and enter the refrigerator 100 again in the case of traveling continuously along the path, thereby circulating.
Preferably, according to the simplified schematic structure of the circulation path 104 shown in fig. 4, a plurality of pre-cooling devices 200 are disposed on each circulation path 104, and each pre-cooling device 200 is spaced by a distance equal to the internal length of the refrigerator 100 minus the length of the pre-cooling device 200 itself, in this way, at least one pre-cooling device 200 can be always disposed in the refrigerator 100, specifically, taking a specific pre-cooling device 200 as an example, when the front end (the side of the static pressure tank group 250) of the pre-cooling device 200 is located at the entrance end 102 of the refrigerator 100, the previous pre-cooling device 200 is located at the preset position in the refrigerator 100; when the pre-cooling device 200 continues to travel such that the rear end of the pre-cooling device 200 (at the first partition 231) is positioned at the entrance end 102 of the freezer 100, the immediately preceding pre-cooling device 200 is moved completely away from the exit end 103 of the freezer 100; when the pre-cooling device 200 continues to travel and is located at a preset position in the refrigerator 100, the front end of the subsequent pre-cooling device 200 is just located at the inlet end 102 of the refrigerator 100, and after the cut flowers in the pre-cooling device 200 are pre-cooled, the next pre-cooling device 200 travels to the preset position for pre-cooling.
Preferably, the entrance and exit of the pre-cooling device 200 in the refrigerator 100 are performed synchronously, that is, the entrance end 102 and the exit end 103 of the refrigerator 100 are opened simultaneously, the pre-cooling device 200 located at the preset position and the subsequent pre-cooling device 200 travel simultaneously, and the previous pre-cooling device 200 travels the same distance from the refrigerator 100, and the subsequent pre-cooling device 200 travels the same distance from the refrigerator 100.
Preferably, the circulation path 104 is further provided with a loading area 105 and an unloading area 106, and the plurality of precooling devices 200 move on the circulation path 104 continuously, so that a worker can load the packaged cut flower packaging boxes 241 in a designated area, namely, the loading area 105; the worker can unload and store the precooled cut flower packaging box 241 in a designated area. Specifically, the unloading zone 106 is located closer to the outlet end 103 of the freezer 100 on the circulation path 104 than the loading zone 105 is located to the outlet end 103 of the freezer 100 on the circulation path 104, thereby ensuring that the precooling apparatus 200 entering the freezer 100 is always loaded with no precooled cut-flower packages 241 and that the precooling apparatus 200 traveling from the unloading zone 106 to the loading zone 105 is always not loaded with any cut-flower packages 241.
Preferably, the entrance end 102 and exit end 103 of the refrigerator 100 have door sizes comparable to the side sizes of the pre-cooling device 200. By means of the circulation path 104, a worker does not need to push the pre-cooling device 200 out of the refrigerator 100 or push the pre-cooling device 200 into the refrigerator 100 by using manpower again, but only needs to load or unload the loading box group 240 in the pre-cooling device 200 in a designated area (the loading area 105 and the unloading area 106) of the circulation path 104, so that manpower consumption is reduced, and manpower resources are saved. In addition, the door at the inlet end 102 and the outlet end 103 of the refrigerator 100 may be designed to be small enough, specifically, the size of the door only needs to be slightly larger than the size of the side surface of the pre-cooling device 200, and if the door is designed to be large enough, the defect that the pre-cooling device 200 cannot be pushed into the door precisely when pushed by manpower is avoided, and the worker pushing the pre-cooling device 200 needs to be ensured to be able to enter the refrigerator 100 smoothly, and when the size of the door is much larger than the size of the side surface of the pre-cooling device 200, the gap between the door and the pre-cooling device 200 becomes larger when the pre-cooling device 200 enters and exits the refrigerator 100, so that the cold air in the refrigerator 100 flows out of the refrigerator 100 more easily, and the hot air outside the refrigerator 100 also enters the refrigerator 100 more easily from the outside, so that the temperature of the first directional airflow 110 will be affected by the hot air entering from the outside when the next pre-cooling operation. In addition, through the setting of circulation path 104, the staff need not get into in the freezer 100, has also guaranteed that the freezer 100 is in the relatively airtight space under the circumstances that the staff need not work in the freezer 100 of low temperature environment, when protecting inside cold air, also avoids outside pollutant object to get into in the freezer 100, causes the pollution to the cutting flower when precooling.
Preferably, each precooling apparatus 200 on the circulation path 104 is provided with a control module 300 that can be connected to the air cooler 101, specifically, the air cooler 101 is preferentially connected to the control module 300 closest to the air cooler 101, more specifically, the information processing unit of the air cooler 101 is preferentially connected to the control module 300 with the strongest signal, and in the case that several control modules 300 are configured identically, the control module 300 at the preset position is closest to the air cooler 101, so that the control module 300 of the precooling apparatus 200 at the preset position is preferentially connected to the information processing unit of the air cooler 101.
Preferably, the movement modes of the plurality of pre-cooling devices 200 on the circulation path 104 may be driven by the pre-cooling devices 200, or may be driven cooperatively by the circulation path 104. Specifically, the self-driving of the pre-cooling device 200 means that the track or road surface of the circulation path 104 is stationary and is driven by a driving device installed inside the pre-cooling device 200, and in this way, at least the movement of the pre-cooling device 200 adjacent to the refrigerator 100 needs to be ensured to be synchronous, that is, at least the pre-cooling device 200 in the refrigerator 100, at the outlet of the refrigerator 100, and at the inlet of the refrigerator 100 is synchronously moved, so that the effect of seamless connection of the pre-cooling device 200 in the refrigerator 100 can be achieved. The cooperative driving by the circulation path 104 means that the precooling apparatuses 200 on all the circulation paths 104 are fixedly mounted at specific positions and the track of the circulation path 104, that is, the precooling apparatuses 200 arranged according to a preset distance are immovable relative to the circulation path 104 and other precooling apparatuses 200 in the direction of the circulation path 104, and the driving structure of the circulation path 104 drives the whole circulation path 104 and the precooling apparatuses 200 on the circulation path 104 to circulate and advance, and sequentially enter the refrigerator 100 to perform precooling.
Preferably, the travel time of the circulation path 104 and/or the pre-cooling device 200 is determined by the control module 300, and the control module 300 preferably synchronously controls the opening of the doors of the inlet end 102 and the outlet end 103 of the refrigerator 100 when controlling the travel of the pre-cooling device 200, and when the doors of the inlet end 102 and the outlet end 103 of the refrigerator 100 are completely opened, the movement of the circulation path 104 and/or the pre-cooling device 200 is started, so as to ensure that the pre-cooling device 200 on the circulation path 104 travels to a preset position in the refrigerator 100 according to a preset rule.
Preferably, the control module 300 controls the air cooler 101 and the pre-cooling device 200 to perform gradient pre-cooling according to parameters set by a worker. Gradient precooling refers to controlling the temperature and the speed of the first directional air flow 110 flowing into the precooling device 200 by the air cooler 101 at different stages of the cut flower temperature, and under the condition of further accelerating the precooling speed, cut flower frostbite caused by excessive precooling can be avoided.
Specifically, the gradient precooling can be divided into at least four stages, the first stage is a rapid cooling stage, the temperature of the first directional airflow 110 is half of the precooling final temperature, and the speed of the first directional airflow 110 is 2 times of the preset speed; the second stage is a medium-speed cooling stage, the temperature of the first directional airflow 110 is three fourths of the precooling final temperature, and the speed of the first directional airflow 110 is 1.5 times of the preset speed; the third stage is a slow cooling stage, the temperature of the first directional airflow 110 is set to be the precooling final temperature, and the speed of the first directional airflow 110 is a preset speed; the fourth stage is a termination stage that maintains the temperature of the first directed gas stream 110 at the pre-chill final temperature and linearly decreases the velocity of the first directed gas stream 110 until the velocity of the first directed gas stream 110 decreases to Om/s.
Preferably, the control module 300 has at least a pre-chill finish temperature, an initial temperature, and a preset rate set on the control panel 301 based on the operator of the loading zone 105. The initial temperature refers to the temperature of cut flowers when field heat is not removed after picking is completed; the preset rate is the rate without the gradient precooling mode of the present application. Specifically, the control panel 301 is connected with the control module 300 in a wired or wireless manner, and the control module 300 obtains the above parameters set by the staff on the control panel 301 to control the pre-cooling parameters and the pre-cooling process.
Preferably, the control module 300 adjusts the gradient pre-cooling phase of the circulating air flow under pressure differential according to the real-time temperature within the cut flower enclosure 241. Specifically, a third temperature and humidity sensor 254 is provided at the air outlet 243 of the cut-flower packing box 241 or at the third air outlet 252 of the third partition plate 251, and the temperature of the air flowing out from the cut-flower packing box 241 is acquired by the third temperature and humidity sensor 254, so that the real-time temperature of the cut flowers in the cut-flower packing box 241 is approximately determined.
Preferably, before the pre-cooling starts, the control module 300 is connected to the air cooler 101 at a preset position, and adjusts the cooling temperature of the air cooler 101 to half of the preset final temperature according to the preset final temperature, and the control module 300 drives the axial flow fan 221 to control the pressure difference between the low-pressure space and the external space so that the air flow rate is 2 times of the preset rate, thereby starting the pre-cooling in the first stage.
Preferably, when the third temperature and humidity sensor 254 detects that the real-time temperature of the cut flower is half of the initial temperature, the control module 300 adjusts the cooling temperature of the air cooler 101 to be three-fourths of the preset final temperature, and the control module 300 adjusts the power of the axial flow fan 221 so that the air flow rate is 1.5 times of the preset rate, thereby starting the pre-cooling of the second stage.
Preferably, when the third temperature and humidity sensor 254 detects that the real-time temperature of the cut flower is one fourth of the initial temperature, the control module 300 adjusts the cooling temperature of the air cooler 101 to a preset final temperature, and the control module 300 adjusts the power of the axial flow fan 221 so that the air flow rate is a preset rate, thereby starting the pre-cooling of the third stage.
Preferably, when the third temperature and humidity sensor 254 detects that the real-time temperature of the cut flowers is one eighth of the initial temperature, the control module 300 maintains the cooling temperature of the air cooler 101 at the preset final temperature, and the control module 300 adjusts the power of the axial flow fan 221 so that the air flow rate is gradually reduced to 0m/s, thereby being precooling in the fourth stage.
Preferably, the method also accurately judges the heat required by the cut flowers to reach the precooling temperature according to the heat transfer rule, and controls the precooling stage of gradient precooling by analyzing the heat change rule.
Preferably, the control module 300 is also able to accurately control the progress phase of the gradient pre-cooling by calculating the heat variation.
Specifically, the control module 300 calculates the heat Q required to be released from the initial temperature to the pre-cooling temperature of the cut flowers to be pre-cooled according to the pre-cooling final temperature and the initial temperature input by the staff and the average specific heat capacity of the cut flowers and the box body space inside the cut flower packaging box 241 1 Wherein the average specific heat capacity can be calculated experimentally, the initial temperature is not necessarily the same for the picked cut flowers, but the change in specific heat capacity should be the same.
Then, the control module 300 calculates the heat Q absorbed by the first directional airflow 110 according to the temperature of the first directional airflow 110 entering the cut flower packaging box 241 and the temperature of the cut flower packaging box 241 obtained by the first temperature and humidity sensor 233 and the third temperature and humidity sensor 254 2 Thereby controlling the pre-cooling stage according to the heat variation.
For the total heat absorbed by the first directional airflow 110, it is only necessary to simply mix the Q of the different stages 2 And (5) overlapping.
Furthermore, the control module 300 controls the pre-cooling stage based on the calculation result, and the specific process is as follows:
q before precooling starts 2 The control module 300 reaches the preset position to connect with the air cooler 101, adjusts the refrigeration temperature of the air cooler 101 to half of the preset final temperature according to the preset final temperature, and drives the axial flow fan 221 to control the pressure difference between the low-pressure space and the external space so that the air flow rate is 2 times of the preset rate, thereby starting the pre-cooling in the first stage.
When the control module 300 calculates Q 2 ＝0.5Q 1 When the cooling temperature of the air cooler 101 is adjusted to be three-fourths of the preset final temperature by the control module 300, the control module 300 adjusts the power of the axial flow fan 221 so that the air flow rate is 1.5 times of the preset rate, and thus the pre-cooling of the second stage is started.
When the control module 300 calculates Q 2 ＝0.75Q 1 When the cooling temperature of the air cooler 101 is adjusted to be the preset final temperature by the control module 300, the power of the axial flow fan 221 is adjusted by the control module 300 so that the air flow rate is the preset rate, and thus the pre-cooling of the third stage is started.
When the control module 300 calculates Q 2 ＝Q 1 When the cooling temperature of the air cooler 101 is kept at the preset final temperature by the control module 300, the power of the axial flow fan 221 is adjusted by the control module 300 so that the air flow rate is gradually reduced to be 0m/s, and thus the cooling is performed in the fourth stage.
Therefore, the control module 300 controls the gradient pre-cooling stage according to the heat exchange rule, so that the gradient change is more accurate, and the gradient pre-cooling effect can be further improved.
Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.
It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents. The description of the invention includes various inventive concepts such as "preferably," "according to a preferred embodiment," or "optionally," all means that the corresponding paragraph discloses a separate concept, and the applicant reserves the right to issue a divisional application according to each inventive concept.
Claims (10)
1. The circular movable cut flower differential pressure precooling device comprises a refrigeration house (100), and is characterized by also comprising a precooling device (200) for loading cut flowers and a control module (300) connected with an air cooler (101) of the precooling device (200),
The control module (300) is configured to:
determining a travel time of the circulation path (104) and/or the pre-cooling device (200);
and controlling the air cooler (101) and the pre-cooling device (200) to perform gradient pre-cooling according to the set parameters.
2. The apparatus according to claim 1, wherein the pre-cooling device (200) is automatically operated to a predetermined position in the freezer (100) along the circulation path (104) according to a predetermined law, wherein,
the static pressure box group (250) of the pre-cooling device (200) and the air cooler (101) are positioned in the same vertical direction;
the plurality of pre-cooling devices (200) sequentially and alternately enter the refrigerator (100) and are positioned at the preset positions in the refrigerator (100).
3. The apparatus according to claim 1 or 2, characterized in that, in the case of the precooling apparatus (200) being located in the freezer (100) forming a circulating air flow, the circulating air flow passes through the precooling apparatus (200) loading the cut flowers and precools the cut flowers in the precooling apparatus (200), wherein,
the motion of a plurality of the pre-cooling devices (200) on the circulation path (104) is driven by the pre-cooling devices (200) or
Is driven cooperatively by the circulation path (104).
4. A circulating mobile cut flower differential pressure precooling apparatus as claimed in any one of claims 1 to 3, characterized in that said precooling apparatus (200) is driven by a driving device installed inside thereof, or in the case that the track or road surface of said circulating path (104) is stationary
The pre-cooling device (200) on the circulation path (104) is fixedly mounted with the track of the circulation path (104) at a specific position.
5. The apparatus according to any one of claims 1 to 4, wherein the control module (300) controls the temperature and the rate of the first directed air flow (110) of the air cooler (101) into the pre-cooling apparatus (200) based on different phases of the cut-flower temperature.
6. The apparatus according to any one of claims 1 to 5, wherein the step of controlling the air cooler (101) and the pre-cooling apparatus (200) by the control module (300) according to the set parameters comprises at least:
and acquiring the pre-cooling final temperature, the initial temperature and the preset speed set on a control panel (301) of the control module (300) to control pre-cooling parameters and pre-cooling processes of the pre-cooling device (200) and/or the air cooler (101).
7. The apparatus according to any one of claims 1 to 6, further comprising a loading box group (240), the loading box group (240) being formed by stacking a plurality of cut flower packaging boxes (241), wherein,
the step of controlling the air cooler (101) and the pre-cooling device (200) by the control module (300) according to the set parameters to perform gradient pre-cooling further comprises:
-adjusting the stage of the gradient pre-cooling of the circulating air flow under pressure difference according to the real-time temperature inside the cut-flower enclosure (241).
8. The apparatus according to any one of claims 1 to 7, wherein the control module (300) is further configured to:
and controlling the progress stage of the gradient precooling by calculating the heat change.
9. The apparatus according to any one of claims 1 to 8, wherein the control module (300) controls the progress phase of the gradient precooling by calculating the heat variation at least comprises:
calculating the heat quantity Q required to be released from the initial temperature to the pre-cooling temperature of the cut flowers to be pre-cooled according to the pre-cooling final temperature, the initial temperature and the average specific heat capacity of the cut flowers and the box body space inside the cut flower packaging box (241) 1 。
10. The apparatus according to any one of claims 1 to 9, wherein the control module (300) controls the progress phase of the gradient precooling by calculating the heat variation further comprises:
acquiring a temperature of the first directional airflow (110) when entering the cut flower packaging box (241) and a temperature when exiting the cut flower packaging box (241);
calculating the heat quantity Q absorbed by the first directional airflow (110) 2 ；
And controlling the proceeding stage of the gradient precooling according to the heat change.
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| CN202311056735.1A CN116878202A (en) | 2023-04-27 | 2023-04-27 | Circulation mobile cut flower pressure difference precooling device |
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| CN202310464339.6A CN116182472B (en) | 2023-04-27 | 2023-04-27 | Mobile cut flower differential pressure precooling system and method |
| CN202311056735.1A CN116878202A (en) | 2023-04-27 | 2023-04-27 | Circulation mobile cut flower pressure difference precooling device |
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| CN202310464339.6A Active CN116182472B (en) | 2023-04-27 | 2023-04-27 | Mobile cut flower differential pressure precooling system and method |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202127760U (en) * | 2011-06-16 | 2012-02-01 | 北京市农林科学院 | Vegetable and fruit pressure difference pre-refrigeration house |
| CN202286093U (en) * | 2011-09-14 | 2012-07-04 | 北京市农林科学院 | Split high temperature-humidity difference pre-cooling storage |
| CN203290167U (en) * | 2013-05-14 | 2013-11-20 | 北京市农林科学院 | Mobile double-wall surface suction type pressure difference pre-cooling ventilation device |
| CN107455449B (en) * | 2017-07-18 | 2020-07-07 | 天津绿新低温科技有限公司 | Efficient tunnel differential pressure air-conditioning precooling equipment for Lingwu long jujubes |
| CN208817824U (en) * | 2018-08-27 | 2019-05-03 | 北京市林业果树科学研究院 | A kind of air-cooled water cooling twin-stage chilldown system |
| CN209978468U (en) * | 2019-05-15 | 2020-01-21 | 北京市农林科学院 | Movable differential pressure precooling and refrigerating integrated equipment |
| CN212029962U (en) * | 2020-03-31 | 2020-11-27 | 天津德润天成科技有限公司 | Movable differential pressure precooler |
| CN216644683U (en) * | 2021-11-23 | 2022-05-31 | 中国农业大学 | Cut flower pressure difference pre-refrigeration house |
| CN113892362B (en) * | 2021-12-08 | 2022-04-26 | 中国农业大学 | Cut flower fresh-keeping treatment system and method |
| CN216886430U (en) * | 2021-12-16 | 2022-07-05 | 新疆农业科学院农产品贮藏加工研究所 | Side-suction type differential pressure precooling compartment body device |
| CN115962599A (en) * | 2022-12-12 | 2023-04-14 | 北京中集智冷科技有限公司 | Movable differential pressure precooling box and conveying device |
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| CN116182472B (en) | 2023-06-27 |
| CN116182472A (en) | 2023-05-30 |
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