CN215676002U - Quick-freezing device for agricultural products - Google Patents

Quick-freezing device for agricultural products Download PDF

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Publication number
CN215676002U
CN215676002U CN202121199711.8U CN202121199711U CN215676002U CN 215676002 U CN215676002 U CN 215676002U CN 202121199711 U CN202121199711 U CN 202121199711U CN 215676002 U CN215676002 U CN 215676002U
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quick
pipeline
temperature
conveyor belt
freezing
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CN202121199711.8U
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李晓琼
何庆
张振涛
赵丹丹
徐鹏
杨俊玲
越云凯
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Technical Institute of Physics and Chemistry of CAS
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Technical Institute of Physics and Chemistry of CAS
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Abstract

The utility model provides a quick-freezing device for agricultural products, which comprises: the quick freezing chamber is internally provided with a conveying belt, and the conveying belt is a tubular conveying belt; and the temperature adjusting mechanism is connected with the quick freezing chamber or the conveyor belt. According to the agricultural product quick-freezing device provided by the utility model, the conveying belt is set to be the pipeline type conveying belt, and the temperature adjusting mechanism is arranged and can provide cold or heat for the quick-freezing chamber, so that the agricultural products can effectively inhibit the crystallization of the wax layer in the quick-freezing and fresh-keeping process, the wax layer is prevented from falling off, and the fresh-keeping time of the agricultural products is prolonged.

Description

Quick-freezing device for agricultural products
Technical Field
The utility model relates to the technical field of quick freezing of agricultural products, in particular to a quick freezing device for agricultural products.
Background
The waxy layer of agricultural product is similar to a 'leather jacket', the cuticle of epidermis is a reticular structure, wax is continuously filled in the cuticle in the growth process of agricultural product to form an inner waxy layer, and the wax covering the outer part of the cuticle is an outer waxy layer. The main functions of the waxy layer are: 1) water retention, and non-porous loss of water in plant tissue is prevented. 2) The wax layer can rapidly remove water drops, and contains antibacterial components to reduce the growth of epidermal bacteria. 3) The outer waxy layer may reduce the leaching of ions and polar solvents from the cell. For agricultural products, the wax layer is the first barrier of self defense, and plays an indispensable role in fruit preservation. Quick freezing is a technology capable of realizing freezing and long-term preservation of agricultural products. In order to ensure that the fruits keep fresh for a long time in the quick-freezing process, the protection of the wax layer is very important.
SUMMERY OF THE UTILITY MODEL
The utility model provides a quick-freezing device for agricultural products, which is used for solving the defect that a wax layer of the agricultural products is crystallized and falls off in the quick-freezing process in the prior art.
The utility model provides a quick-freezing device for agricultural products, which comprises: the quick freezing chamber is internally provided with a conveying belt, and the conveying belt is a tubular conveying belt; and the temperature adjusting mechanism is connected with the quick freezing chamber or the conveyor belt.
According to the agricultural product quick-freezing device provided by the utility model, the temperature adjusting mechanism comprises: and two ends of the first temperature adjusting branch are respectively connected with two ends of the pipeline of the conveyor belt.
According to the agricultural product quick-freezing device provided by the utility model, the temperature adjusting mechanism comprises: the two ends of the second temperature adjusting branch are respectively connected with the two ends of the pipeline of the conveyor belt; and part of the first spraying mechanism is arranged in the quick-freezing chamber and is positioned above the conveyor belt.
According to the agricultural product quick-freezing device provided by the utility model, the first temperature adjusting branch comprises: the condenser or the evaporator is connected with one end of the pipeline of the conveyor belt through a first pipeline; a first interface of the four-way valve is connected with the condenser or the evaporator through a second pipeline, and a third interface of the four-way valve is connected with the other end of the pipeline of the conveyor belt; and the compressor is connected with the second interface and the fourth interface of the four-way valve.
According to the quick-freezing device for agricultural products, provided by the utility model, the first temperature adjusting branch further comprises an electronic expansion valve and a first temperature sensor, and the electronic expansion valve and the first temperature sensor are arranged on the first pipeline.
According to the agricultural product quick-freezing device provided by the utility model, the second temperature adjusting branch comprises: the heat exchanger is connected with two ends of the pipeline of the conveyor belt through a third pipeline, and a first valve is arranged on the third pipeline; the first spraying mechanism comprises: the liquid nitrogen pipe is provided with a plurality of first atomizer, first atomizer is located the top of conveyer belt.
According to the agricultural product quick-freezing device provided by the utility model, the agricultural product quick-freezing device further comprises a second spraying mechanism, and the second spraying mechanism comprises: a fourth pipeline, wherein a plurality of second atomizing nozzles are arranged on the fourth pipeline, and the second atomizing nozzles are positioned above the conveyor belt; a fifth pipeline in communication with the fourth pipeline.
According to the quick-freezing device for agricultural products, provided by the utility model, the second spraying mechanism further comprises a plurality of electromagnetic regulating valves, and the electromagnetic regulating valves are respectively arranged on the fourth pipeline and the fifth pipeline.
The quick-freezing device for agricultural products further comprises a plurality of second temperature sensors, and the second temperature sensors are arranged on the conveyor belt.
According to the quick-freezing device for agricultural products, provided by the utility model, the quick-freezing chamber is provided with a feeding hole, a discharging hole and a drain valve.
According to the agricultural product quick-freezing device provided by the utility model, the conveying belt is set to be the pipeline type conveying belt, and the temperature adjusting mechanism is arranged and can provide cold or heat for the quick-freezing chamber, so that the agricultural products can effectively inhibit the crystallization of the wax layer in the quick-freezing and fresh-keeping process, the wax layer is prevented from falling off, and the fresh-keeping time of the agricultural products is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a quick-freezing device for agricultural products provided by the utility model;
reference numerals:
10: a quick freezing chamber; 11: a conveyor belt; 12: a feed inlet;
13: a discharge port; 14: a drain valve; 20: a temperature adjustment mechanism;
21: a condenser (evaporator); 22: a four-way valve; 23: a compressor;
24: a first pipeline; 25: a second pipeline; 26: an electronic expansion valve;
27: a first temperature sensor; 30: a fourth pipeline; 31: a second atomizer;
32: a fifth pipeline; 33: an electromagnetic regulating valve; 40: a second temperature sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
The quick freezing apparatus for agricultural products of the present invention will be described with reference to fig. 1.
As shown in fig. 1, in one embodiment of the present invention, an agricultural product quick-freezing apparatus comprises: a quick freezing chamber 10 and a temperature adjusting mechanism 20. A conveyor belt 11 is arranged in the quick freezing chamber 10, the conveyor belt 11 is used for conveying agricultural products, and the conveyor belt 11 is a tubular conveyor belt. The temperature adjusting mechanism 20 is connected to the freezing chamber 10 or the conveyor belt 11.
Specifically, the temperature adjustment mechanism 20 is used to provide cold or heat to the quick freezing chamber 10. Before putting into quick-freeze room 10 with agricultural product, open temperature regulation mechanism 20 earlier for provide cold volume for quick-freeze room 10, then evenly lay agricultural product on conveyer belt 11, temperature regulation mechanism 20 continues to provide cold volume for quick-freeze room 10, when the temperature in quick-freeze room 10 is about to be less than the condensation point of agricultural product wax coat, temperature regulation mechanism 20 begins to provide heat for quick-freeze room 10, makes quick-freeze room 10 suitably heat up, in order to prevent wax coat crystallization and the glass state conversion of quick-freeze in-process agricultural product, thereby drops the wax coat.
Specifically, the conveyor belt 11 is a tubular conveyor belt, that is, the pipeline of the conveyor belt 11 can be connected with the temperature adjusting mechanism 20, so that cold energy generated by the temperature adjusting mechanism 20 can be transmitted to the conveyor belt 11 through the pipeline, the agricultural products laid on the conveyor belt 11 can be quickly frozen and fresh-kept, and when the temperature in the quick-freezing chamber 10 is about to reach the condensation point of the wax layer of the agricultural products, the temperature adjusting mechanism 20 starts to transmit hot air into the pipeline of the conveyor belt 11, so as to increase the temperature in the quick-freezing chamber 10.
Further, in one embodiment of the present invention, the temperature adjusting mechanism 20 may be a condenser or a combination of an evaporator, a compressor and a four-way valve, the compressor converts the liquid refrigerant into the gaseous refrigerant, absorbs a large amount of heat, and the condenser outputs cold air for cooling the quick-freezing chamber 10; when the temperature of the quick-freezing chamber 10 is close to the condensation point of the wax layer of the agricultural product, the four-way valve switches the direction, the compressor converts the gaseous refrigerant into the liquid refrigerant, a large amount of heat is released, and the evaporator outputs hot air for heating the quick-freezing chamber 10.
Optionally, in an embodiment of the present invention, the temperature adjusting mechanism 20 may also be a combination of a spraying mechanism and a heating mechanism, specifically, the spraying mechanism includes a liquid nitrogen pipe, the liquid nitrogen source extends into the quick freezing chamber 10, the liquid nitrogen pipe is provided with a plurality of atomizing nozzles, the atomizing nozzles are located above the conveyor belt 11, and the atomizing nozzles spray low-temperature liquid nitrogen to cool the quick freezing chamber 10; when the temperature of the quick-freezing chamber 10 is close to the condensation point of the wax layer of the agricultural product, the heating mechanism provides heat for the quick-freezing chamber 10 to heat. Specifically, the heating mechanism comprises a heat exchanger, the heat exchanger is connected with the pipeline of the conveyor belt 11 and is used for exchanging heat with media in the pipeline so as to increase the temperature of the pipeline, and therefore the temperature of the conveyor belt 11 is increased, and the temperature in the quick-freezing chamber 10 is larger than the condensation point temperature of the wax layer of the agricultural product.
Further, in the embodiment of the present invention, the conveyor belt 11 may be a spiral type pipeline conveyor belt, or may be a plurality of straight pipe type conveyor belts, and of course, the shape of the conveyor belt 11 may also be in other forms.
According to the agricultural product quick-freezing device provided by the embodiment of the utility model, the conveying belt is set to be the pipeline type conveying belt, and the temperature adjusting mechanism is arranged and can provide cold or heat for the quick-freezing chamber, so that the agricultural products can effectively inhibit the crystallization of the wax layer in the quick-freezing and fresh-keeping process, the wax layer is prevented from falling off, and the fresh-keeping time of the agricultural products is prolonged.
In one embodiment of the present invention, the temperature adjusting mechanism 20 includes a first temperature adjusting branch, and both ends of the first temperature adjusting branch are respectively connected to both ends of the duct of the conveyor belt 11.
Specifically, as shown in fig. 1, the first temperature adjustment branch includes: a condenser (evaporator) 21, a four-way valve 22, a compressor 23, a first line 24 and a second line 25. A condenser (evaporator) 21 is connected to one end of the pipe of the conveyor belt 11 through a first pipe 24, a first port of the four-way valve 22 is connected to the condenser 21 through a second pipe 25, a third port of the four-way valve 22 is connected to the other end of the pipe of the conveyor belt 11, and a compressor 23 is connected to the second port and the fourth port of the four-way valve 22. Specifically, the first pipeline 24, the condenser (evaporator) 21, the second pipeline 25, the four-way valve 22 and the conveyor belt 11 form a loop, the compressor 23 converts the liquid refrigerant into the gaseous refrigerant, absorbs a large amount of heat, and the condenser 21 outputs cold air for cooling the quick-freezing chamber 10; when the temperature of the quick-freezing chamber 10 is close to the condensation point of the wax layer of the agricultural product, the four-way valve 22 switches the direction, the compressor 23 converts the gaseous refrigerant into the liquid refrigerant, a large amount of heat is released, and the evaporator 21 outputs hot air for heating the quick-freezing chamber 10.
It should be noted that: in fig. 1, when the first temperature adjusting branch is a cooling branch, reference numeral 21 denotes a condenser; when the first temperature adjusting branch is a heating branch, reference numeral 21 denotes an evaporator.
Further, in one embodiment of the present invention, the first temperature adjusting branch further includes an electronic expansion valve 26 and a first temperature sensor 27. An electronic expansion valve 26 and a first temperature sensor 27 are disposed in the first pipe 24, the first temperature sensor 27 is configured to detect the temperature of the first pipe 24, and the electronic expansion valve 26 is configured to control the opening degree of the electronic expansion valve 26 according to temperature data detected by the first temperature sensor 27, thereby controlling the flow rate of cold air or hot air of the first pipe 24.
Alternatively, in one embodiment of the present invention, the temperature adjustment mechanism 20 includes: second temperature regulation branch road and first mechanism that sprays. Two ends of the second temperature adjusting branch are respectively connected with two ends of a pipeline of the conveyor belt 11, and the first spraying mechanism is arranged in the quick-freezing chamber 10 and positioned above the conveyor belt 11.
Particularly, the second temperature adjusting branch comprises a heat exchanger, the heat exchanger is connected with two ends of the pipeline of the conveyor belt 11 through a third pipeline to form a loop, and a first valve is arranged on the third pipeline and used for controlling the on-off of the third pipeline. The first mechanism that sprays includes the liquid nitrogen pipe, and the liquid nitrogen pipe is connected with the liquid nitrogen dewar, and in the liquid nitrogen pipe extended to fast cold chamber 10, be provided with a plurality of first atomizer on the liquid nitrogen pipe, first atomizer was located the top of conveyer belt 11.
Specifically, before agricultural products are put into the quick-freezing chamber 10, the liquid nitrogen Dewar is opened, and liquid nitrogen is sprayed into the quick-freezing chamber 10 through the first atomizing nozzle so as to cool the quick-freezing chamber 10. Then evenly lay the agricultural product on conveyer belt 11, first atomizer sprays liquid nitrogen to in quick-freeze room 10 continuously, when the temperature of quick-freeze room 10 was close the temperature of the condensation point of agricultural product wax layer, closes the liquid nitrogen dewar, opens first valve, and the medium in conveyer belt 11 flows into in the heat exchanger and carries out the heat exchange with the medium in the heat exchanger to cold volume absorption in the conveyer belt 11, thereby heats up conveyer belt 11, so that the temperature in the quick-freeze room 10 is higher than the condensation point temperature of crops.
As shown in fig. 1, in one embodiment of the present invention, the agricultural product quick-freezing apparatus further comprises a second spraying mechanism, the second spraying mechanism comprising: a fourth line 30, a second atomizer 31 and a fifth line 32. The fourth pipeline 30 is provided with a plurality of second atomizing nozzles 31, the second atomizing nozzles 31 are positioned above the conveyor belt 11, and the fifth pipeline 32 is communicated with the fourth pipeline 30.
Specifically, the fourth pipeline 30 is used for introducing water, the fifth pipeline 32 is used for introducing a low-temperature adhesive, and the water and the low-temperature adhesive are mixed and then sprayed on the surface of the agricultural product through the second atomizing nozzle 31 so as to increase the surface temperature of the agricultural product and enable the surface temperature to be higher than the condensation point temperature of the wax layer of the agricultural product.
Further, the second spraying mechanism further includes a plurality of electromagnetic adjusting valves 33, and the electromagnetic adjusting valves 33 are respectively disposed on the fourth pipeline 30 and the fifth pipeline 32. Specifically, the electromagnetic regulating valve 33 can regulate the flow rate of water and the low-temperature adhesive to avoid the surface temperature of the agricultural products from rising too high.
As shown in fig. 1, in one embodiment of the present invention, the agricultural product quick-freezing apparatus further comprises a plurality of second temperature sensors 40, and the plurality of second temperature sensors 40 are disposed on the conveyor belt 11 for detecting the temperature of the conveyor belt 11.
Specifically, the second temperature sensor 40 constantly detects the surface temperature of the conveyor belt 11, and when it detects that the surface temperature of the conveyor belt 11 reaches a preset temperature, the electromagnetic regulating valve 33 is opened to spray the low-temperature adhesive to the surface of the agricultural product by the second atomizing nozzle 31, so as to increase the surface temperature of the agricultural product. Further, the electromagnetic regulating valve 33 can automatically regulate the opening of the valve core to regulate the flow rates of water in the fourth pipeline 30 and the low-temperature adhesive in the fifth pipeline 32, and the mixture of the water and the low-temperature adhesive is uniformly sprayed on the surface of the agricultural product through the second atomizing nozzle 31, so that the surface temperature of the agricultural product is higher than the temperature of a condensation point of a wax layer of the agricultural product, crystallization and glass state conversion of the wax layer of the agricultural product are prevented, and the wax layer is prevented from falling off. In this embodiment, the preset temperature may be a temperature value close to the condensation point temperature of the agricultural product.
As shown in fig. 1, in one embodiment of the present invention, the quick-freezing chamber 10 is provided with a feed port 12, a discharge port 13 and a drain valve 14. Specifically, the quick-freezing chamber 10 is provided with a feeding port 12 and a discharging port 13, and the feeding port 12 and the discharging port 13 can be automatic doors which can automatically feed and discharge materials. After the rapid freezing, the excess water in the rapid freezing chamber 10 can be discharged through the drain valve 14.
The working principle of the present invention will be described in detail below by taking the embodiment shown in fig. 1 as an example.
When the agricultural products are quickly frozen and fresh-kept, the temperature adjusting mechanism 20 is firstly opened, so that the temperature adjusting mechanism can normally work to provide cold energy for the quick freezing chamber 10. Specifically, the compressor 23 converts the liquid refrigerant into the gaseous refrigerant, absorbing a large amount of heat, and the condenser 21 outputs cold air, which enters the duct of the conveyor belt 11, thereby making the surface of the conveyor belt 11 have a low temperature.
Agricultural products to be quickly frozen are placed in the feeding bin 12, the agricultural products are uniformly paved on the conveying belt 11 through the feeding bin 12, and the agricultural products can be quickly frozen due to the fact that the surface temperature of the conveying belt 11 is low, and fresh keeping of the agricultural products is achieved. In the quick-freezing process, the first temperature sensor 27 is used for detecting the temperature of the first pipeline 24, and the electronic expansion valve 26 automatically controls the flow rate of cold air in the first pipeline 24 according to the temperature data detected by the first temperature sensor 27. The second temperature sensor 40 is used for detecting the surface temperature of the conveyor belt 11, when the second temperature sensor 40 detects that the surface temperature of the conveyor belt 11 is close to the condensation point temperature of the wax layer of the agricultural product, the direction of the four-way valve 22 is switched, the compressor 23 converts the gaseous refrigerant into the liquid refrigerant and emits a large amount of heat, the evaporator 21 outputs hot air, and the hot air enters the pipeline of the conveyor belt 11 and is properly warmed for the conveyor belt 11 so as to prevent the surface temperature of the conveyor belt 11 from being lower than the condensation point temperature of the wax layer.
Further, when the second temperature sensor 40 detects that the surface temperature of the conveyor belt 11 is close to the condensation point temperature of the wax layer of the agricultural product, water is introduced into the fourth pipeline 30, low-temperature adhesive is introduced into the fifth pipeline 32, and the mixed water and low-temperature adhesive are sprayed on the surface of the agricultural product through the second atomizing nozzle 31 to properly warm the surface of the agricultural product and prevent the surface temperature of the agricultural product from being lower than the condensation point temperature of the wax layer.
After the agricultural products are quick-frozen, the conveying belt 11 is opened to convey the quick-frozen agricultural products to the discharge port 13, and the wax dropping prevention effect of the agricultural products is detected at the discharge port 13. After the quick freezing is finished, the excessive water in the quick freezing chamber 10 can be discharged through the drain valve 14.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. An agricultural product quick-freezing device, which is characterized by comprising:
the quick freezing chamber is internally provided with a conveying belt, and the conveying belt is a tubular conveying belt;
and the temperature adjusting mechanism is connected with the quick freezing chamber or the conveyor belt.
2. Quick-freezing apparatus for agricultural products according to claim 1, wherein said temperature adjusting mechanism comprises:
and two ends of the first temperature adjusting branch are respectively connected with two ends of the pipeline of the conveyor belt.
3. Quick-freezing apparatus for agricultural products according to claim 1, wherein said temperature adjusting mechanism comprises:
the two ends of the second temperature adjusting branch are respectively connected with the two ends of the pipeline of the conveyor belt;
and part of the first spraying mechanism is arranged in the quick-freezing chamber and is positioned above the conveyor belt.
4. Quick-freezing apparatus for agricultural products according to claim 2, wherein said first temperature regulating branch comprises:
the condenser or the evaporator is connected with one end of the pipeline of the conveyor belt through a first pipeline;
a first interface of the four-way valve is connected with the condenser or the evaporator through a second pipeline, and a third interface of the four-way valve is connected with the other end of the pipeline of the conveyor belt;
and the compressor is connected with the second interface and the fourth interface of the four-way valve.
5. Agricultural product quick-freezing device according to claim 4, wherein the first temperature adjustment branch further comprises an electronic expansion valve and a first temperature sensor, and the electronic expansion valve and the first temperature sensor are disposed in the first pipeline.
6. Quick-freezing apparatus for agricultural products according to claim 3, wherein said second temperature adjustment branch comprises:
the heat exchanger is connected with two ends of the pipeline of the conveyor belt through a third pipeline, and a first valve is arranged on the third pipeline;
the first spraying mechanism comprises: the liquid nitrogen pipe is provided with a plurality of first atomizer, first atomizer is located the top of conveyer belt.
7. The quick-freezing apparatus for agricultural products according to claim 5, further comprising a second spraying mechanism, said second spraying mechanism comprising:
a fourth pipeline, wherein a plurality of second atomizing nozzles are arranged on the fourth pipeline, and the second atomizing nozzles are positioned above the conveyor belt;
a fifth pipeline in communication with the fourth pipeline.
8. The quick-freezing device for agricultural products according to claim 7, wherein the second spraying mechanism further comprises a plurality of electromagnetic regulating valves, and the electromagnetic regulating valves are respectively arranged on the fourth pipeline and the fifth pipeline.
9. Agricultural product quick-freezing apparatus according to claim 4 or 6, further comprising a plurality of second temperature sensors, said second temperature sensors being disposed on said conveyor belt.
10. An agricultural product quick-freezing apparatus as claimed in claim 1, wherein the quick-freezing chamber is provided with a feed inlet, a discharge outlet and a drain valve.
CN202121199711.8U 2021-05-31 2021-05-31 Quick-freezing device for agricultural products Active CN215676002U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121199711.8U CN215676002U (en) 2021-05-31 2021-05-31 Quick-freezing device for agricultural products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121199711.8U CN215676002U (en) 2021-05-31 2021-05-31 Quick-freezing device for agricultural products

Publications (1)

Publication Number Publication Date
CN215676002U true CN215676002U (en) 2022-01-28

Family

ID=79973383

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121199711.8U Active CN215676002U (en) 2021-05-31 2021-05-31 Quick-freezing device for agricultural products

Country Status (1)

Country Link
CN (1) CN215676002U (en)

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