Agricultural product quick freezing device

Abstract

The present invention provides an agricultural product quick-freezing device, comprising: a quick-freezing chamber, wherein a conveyor belt is arranged in the quick-freezing chamber, and the conveyor belt is a tubular conveyor belt; and a temperature regulating mechanism, wherein the temperature regulating mechanism is connected to the quick-freezing chamber or the conveyor belt. The agricultural product quick-freezing device provided by the present invention provides a conveyor belt as a tubular conveyor belt and a temperature regulating mechanism, and the temperature regulating mechanism can provide cold or heat for the quick-freezing chamber, so that the wax layer crystallization can be effectively inhibited during the quick-freezing and fresh-keeping process of the agricultural products, thereby preventing the wax layer from falling off, and prolonging the fresh-keeping time of the agricultural products.

Description

Technical Field

[0001] The invention relates to the technical field of quick-freezing agricultural products, and in particular to a quick-freezing device for agricultural products. Background Art

[0002] The wax layer of agricultural products is similar to a "leather jacket". The cuticle of the epidermis is a mesh structure. During the growth of agricultural products, wax is constantly filled in between to form an inner wax layer. The wax covering the outside of the cuticle is the outer wax layer. The main functions of the wax layer are: 1) water retention, preventing non-stomatal loss of water in plant tissues. 2) resistance to pests and diseases, the wax layer can quickly remove water droplets, and the wax layer contains antibacterial ingredients that can reduce the growth of epidermal bacteria. 3) The outer wax layer can reduce the infiltration of ions and polar solvents from cells. For agricultural products, the wax layer is the first barrier of self-defense and plays an indispensable role in preserving fruits. Quick freezing is a technology that can achieve freezing and long-term preservation of agricultural products. In order to ensure the long-term preservation of fruits during the quick freezing process, the protection of the wax layer is crucial. Summary of the invention

[0003] The invention provides an agricultural product quick-freezing device, which is used to solve the defect of the wax layer of agricultural products being crystallized and falling off during the quick-freezing process in the prior art.

[0004] The invention provides an agricultural product quick-freezing device, comprising: a quick-freezing chamber, wherein a conveyor belt is arranged in the quick-freezing chamber, and the conveyor belt is a tubular conveyor belt; and a temperature regulating mechanism, wherein the temperature regulating mechanism is connected to the quick-freezing chamber or the conveyor belt.

[0005] According to an agricultural product quick-freezing device provided by the present invention, the temperature regulating mechanism comprises: a first temperature regulating branch, and two ends of the first temperature regulating branch are respectively connected to two ends of the pipeline of the conveyor belt.

[0006] According to an agricultural product quick-freezing device provided by the present invention, the temperature regulating mechanism includes: a second temperature regulating branch, the two ends of the second temperature regulating branch are respectively connected to the two ends of the pipeline of the conveyor belt; a first spray mechanism, a part of the first spray mechanism is arranged in the quick-freezing chamber and located above the conveyor belt.

[0007] According to an agricultural product quick-freezing device provided by the present invention, the first temperature regulating branch includes: a condenser or an evaporator, the condenser or the evaporator is connected to one end of the pipeline of the conveyor belt through a first pipeline; a four-way valve, the first interface of the four-way valve is connected to the condenser or the evaporator through a second pipeline, and the third interface of the four-way valve is connected to the other end of the pipeline of the conveyor belt; a compressor, the compressor is connected to the second interface and the fourth interface of the four-way valve.

[0008] According to the agricultural product quick-freezing device provided by the present invention, the first temperature regulating branch further includes an electronic expansion valve and a first temperature sensor, and the electronic expansion valve and the first temperature sensor are arranged in the first pipeline.

[0009] According to an agricultural product quick-freezing device provided by the present invention, the second temperature regulating branch includes: a heat exchanger, the heat exchanger is connected to both 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 includes: a liquid nitrogen pipe, and a plurality of first atomizing nozzles are arranged on the liquid nitrogen pipe, and the first atomizing nozzles are located above the conveyor belt.

[0010] According to the present invention, an agricultural product quick-freezing device also includes a second spray mechanism, which includes: a fourth pipeline, on which a plurality of second atomizing nozzles are arranged, and the second atomizing nozzles are located above the conveyor belt; and a fifth pipeline, which is connected to the fourth pipeline.

[0011] According to the agricultural product quick-freezing device provided by the present invention, the second spray mechanism further includes a plurality of electromagnetic regulating valves, and the electromagnetic regulating valves are respectively arranged in the fourth pipeline and the fifth pipeline.

[0012] The agricultural product quick-freezing device provided by the present invention further includes a plurality of second temperature sensors, wherein the second temperature sensors are arranged on the conveyor belt.

[0013] According to an agricultural product quick-freezing device provided by the present invention, the quick-freezing chamber is provided with a feed inlet, a feed outlet and a drain valve.

[0014] The agricultural product quick-freezing device provided by the present invention configures the conveyor belt as a pipeline conveyor belt and provides a temperature regulating mechanism, which can provide cold or heat for the quick-freezing chamber, so that the wax layer crystallization can be effectively suppressed during the quick-freezing and fresh-keeping process of the agricultural products, thereby preventing the wax layer from falling off and prolonging the fresh-keeping time of the agricultural products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of the agricultural product quick-freezing device provided by the present invention;

[0017] Reference numerals:

[0018] 10: Quick freezing chamber; 11: Conveyor belt; 12: Feeding port;

[0019] 13: discharge port; 14: drain valve; 20: temperature adjustment mechanism;

[0020] 21: condenser (evaporator); 22: four-way valve; 23: compressor;

[0021] 24: First pipeline; 25: Second pipeline; 26: Electronic expansion valve;

[0022] 27: first temperature sensor; 30: fourth pipeline; 31: second atomizing nozzle;

[0023] 32: fifth pipeline; 33: electromagnetic regulating valve; 40: second temperature sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Combine the following Figure 1 The agricultural product quick freezing device of the present invention is described.

[0026] like Figure 1 As shown, in one embodiment of the present invention, the quick freezing device for agricultural products comprises: a quick freezing chamber 10 and a temperature regulating mechanism 20. A conveyor belt 11 is arranged in the quick freezing chamber 10, and the conveyor belt 11 is used to convey agricultural products, wherein the conveyor belt 11 is a tubular conveyor belt. The temperature regulating mechanism 20 is connected to the quick freezing chamber 10 or the conveyor belt 11.

[0027] Specifically, the temperature regulating mechanism 20 is used to provide cold or heat for the quick freezing chamber 10. Before placing the agricultural products in the quick freezing chamber 10, the temperature regulating mechanism 20 is first turned on to provide cold for the quick freezing chamber 10, and then the agricultural products are evenly laid on the conveyor belt 11. The temperature regulating mechanism 20 continues to provide cold for the quick freezing chamber 10. When the temperature in the quick freezing chamber 10 is about to be lower than the condensation point of the wax layer of the agricultural products, the temperature regulating mechanism 20 starts to provide heat for the quick freezing chamber 10, so that the quick freezing chamber 10 is appropriately heated to prevent the wax layer of the agricultural products from crystallizing and glass transition during the quick freezing process, thereby causing the wax layer to fall off.

[0028] Specifically, the conveyor belt 11 is a tubular conveyor belt, that is, the pipeline of the conveyor belt 11 can be connected to the temperature regulating mechanism 20 to transmit the cold energy generated by the temperature regulating mechanism 20 to the conveyor belt 11 through the pipeline. The conveyor belt 11 can quickly freeze and preserve the agricultural products laid thereon. 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 regulating mechanism 20 starts to transmit hot air to the pipeline of the conveyor belt 11 to increase the temperature in the quick-freezing chamber 10.

[0029] Furthermore, in one embodiment of the present invention, the temperature regulating mechanism 20 can be a combination of a condenser or an evaporator, a compressor and a four-way valve. The compressor converts the liquid refrigerant into a gaseous refrigerant, absorbs a large amount of heat, and the condenser outputs cold air to cool the quick-freezing chamber 10; when the temperature of the quick-freezing chamber 10 is close to the temperature of the condensation point of the wax layer of the agricultural product, the four-way valve switches direction, the compressor converts the gaseous refrigerant into a liquid refrigerant, releases a large amount of heat, and the evaporator outputs hot air to heat the quick-freezing chamber 10.

[0030] Optionally, in one embodiment of the present invention, the temperature regulating mechanism 20 may also be a combination of a spray mechanism and a heating mechanism. Specifically, the spray mechanism includes a liquid nitrogen pipe, the liquid nitrogen source extends into the quick freezing chamber 10, and a plurality of atomizing nozzles are arranged on the liquid nitrogen pipe. 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 temperature of the condensation point of the wax layer of the agricultural product, the heating mechanism provides heat to the quick freezing chamber 10 to increase the temperature. Specifically, the heating mechanism includes a heat exchanger, which is connected to the pipeline of the conveyor belt 11 and is used to perform heat exchange with the medium in the pipeline to increase the temperature of the pipeline, thereby increasing the temperature of the conveyor belt 11, so that the temperature in the quick freezing chamber 10 is greater than the condensation point temperature of the wax layer of the agricultural product.

[0031] Furthermore, in the embodiment of the present invention, the conveyor belt 11 may be a spiral pipe conveyor belt, or a plurality of straight pipe conveyor belts. Of course, the shape of the conveyor belt 11 may also be other forms.

[0032] The agricultural product quick-freezing device provided in the embodiment of the present invention configures the conveyor belt as a pipeline conveyor belt and provides a temperature regulating mechanism, which can provide cold or heat for the quick-freezing chamber, so that the wax layer of agricultural products can be effectively inhibited from crystallizing during the quick-freezing and preservation process, thereby preventing the wax layer from falling off and extending the shelf life of the agricultural products.

[0033] In one embodiment of the present invention, the temperature regulating mechanism 20 includes a first temperature regulating branch, and two ends of the first temperature regulating branch are respectively connected to two ends of the pipeline of the conveyor belt 11.

[0034] Specifically, if Figure 1As shown, the first temperature regulating branch includes: a condenser (evaporator) 21, a four-way valve 22, a compressor 23, a first pipeline 24 and a second pipeline 25. The condenser (evaporator) 21 is connected to one end of the pipeline of the conveyor belt 11 through the first pipeline 24, the first interface of the four-way valve 22 is connected to the condenser 21 through the second pipeline 25, the third interface of the four-way valve 22 is connected to the other end of the pipeline of the conveyor belt 11, and the compressor 23 is connected to the second interface and the fourth interface 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 a gaseous refrigerant, absorbs a large amount of heat, and the condenser 21 outputs cold air to cool the quick-freezing chamber 10; when the temperature of the quick-freezing chamber 10 is close to the temperature of the condensation point of the wax layer of the agricultural product, the four-way valve 22 switches direction, the compressor 23 converts the gaseous refrigerant into a liquid refrigerant, releases a large amount of heat, and the evaporator 21 outputs hot air to heat the quick-freezing chamber 10.

[0035] It should be noted that: Figure 1 In the figure, when the first temperature adjustment branch is a cooling branch, the reference numeral 21 represents a condenser; when the first temperature adjustment branch is a heating branch, the reference numeral 21 represents an evaporator.

[0036] Further, in one embodiment of the present invention, the first temperature regulating branch further includes an electronic expansion valve 26 and a first temperature sensor 27. The electronic expansion valve 26 and the first temperature sensor 27 are arranged in the first pipeline 24, the first temperature sensor 27 is used to detect the temperature of the first pipeline 24, and the electronic expansion valve 26 is used to control the opening of the electronic expansion valve 26 according to the temperature data detected by the first temperature sensor 27, thereby controlling the flow rate of cold air or hot air in the first pipeline 24.

[0037] Optionally, in one embodiment of the present invention, the temperature regulating mechanism 20 includes: a second temperature regulating branch and a first spray mechanism. The two ends of the second temperature regulating branch are respectively connected to the two ends of the pipeline of the conveyor belt 11, and part of the first spray mechanism is arranged in the quick freezing chamber 10 and above the conveyor belt 11.

[0038] Specifically, the second temperature regulating branch includes a heat exchanger, which is connected to both ends of the pipeline of the conveyor belt 11 through a third pipeline to form a loop, and a first valve is provided on the third pipeline to control the on-off of the third pipeline. The first spray mechanism includes a liquid nitrogen pipe, which is connected to the liquid nitrogen Dewar, and the liquid nitrogen pipe extends into the quick freezing chamber 10. A plurality of first atomizing nozzles are provided on the liquid nitrogen pipe, and the first atomizing nozzles are located above the conveyor belt 11.

[0039] Specifically, before placing agricultural products in the quick-freezing chamber 10, the liquid nitrogen dewar is opened first, and liquid nitrogen is sprayed into the quick-freezing chamber 10 through the first atomizing nozzle to cool the quick-freezing chamber 10. Then the agricultural products are evenly laid on the conveyor belt 11, and the first atomizing nozzle continues to spray liquid nitrogen into the quick-freezing chamber 10. When the temperature of the quick-freezing chamber 10 approaches the temperature of the condensation point of the wax layer of the agricultural products, the liquid nitrogen dewar is closed, the first valve is opened, and the medium in the conveyor belt 11 flows into the heat exchanger to perform heat exchange with the medium in the heat exchanger, so as to absorb the cold in the conveyor belt 11, thereby heating the conveyor belt 11, so that the temperature in the quick-freezing chamber 10 is higher than the condensation point temperature of the crops.

[0040] like Figure 1 As shown, in one embodiment of the present invention, the agricultural product quick freezing device further includes a second spray mechanism, which includes: a fourth pipeline 30, a second atomizing nozzle 31 and a fifth pipeline 32. The fourth pipeline 30 is provided with a plurality of second atomizing nozzles 31, the second atomizing nozzles 31 are located above the conveyor belt 11, and the fifth pipeline 32 is connected to the fourth pipeline 30.

[0041] Specifically, the fourth pipe 30 is used to introduce water, and the fifth pipe 32 is used to introduce low-temperature adhesive. After the water and the low-temperature adhesive are mixed, they are sprayed on the surface of the agricultural product through the second atomizing nozzle 31 to increase the surface temperature of the agricultural product so that its surface temperature is higher than the condensation point temperature of the wax layer of the agricultural product.

[0042] Furthermore, the second spray mechanism further includes a plurality of electromagnetic regulating valves 33, which are respectively arranged in the fourth pipeline 30 and the fifth pipeline 32. Specifically, the electromagnetic regulating valves 33 can adjust the flow of water and low-temperature adhesive to prevent the surface temperature of the agricultural products from rising too high.

[0043] like Figure 1 As shown, in one embodiment of the present invention, the agricultural product quick-freezing device further includes a plurality of second temperature sensors 40 , which are disposed on the conveyor belt 11 to detect the temperature of the conveyor belt 11 .

[0044] Specifically, the second temperature sensor 40 constantly detects the surface temperature of the conveyor belt 11. When it detects that the surface temperature of the conveyor belt 11 reaches the preset temperature, the electromagnetic regulating valve 33 is opened to spray the low-temperature adhesive on the surface of the agricultural product through the second atomizing nozzle 31 to increase the surface temperature of the agricultural product. Further, the electromagnetic regulating valve 33 can automatically adjust the valve core opening to adjust the flow of water in the fourth pipeline 30 and the low-temperature adhesive in the fifth pipeline 32. The mixture of water and low-temperature adhesive is evenly 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 the condensation point of the wax layer of the agricultural product, so as to prevent the wax layer of the agricultural product from crystallizing and glass transition, thereby preventing the wax layer from falling off. In this embodiment, the preset temperature can be a temperature value close to the condensation point temperature of the agricultural product.

[0045] like Figure 1 As shown, in one embodiment of the present invention, the quick freezing chamber 10 is provided with a feed inlet 12, a discharge port 13 and a drain valve 14. Specifically, the quick freezing chamber 10 is provided with a feed inlet 12 and a discharge port 13, and the feed inlet 12 and the discharge port 13 can be automatic doors, which can automatically feed and discharge. After the quick freezing is completed, the excess water in the quick freezing chamber 10 can be discharged through the drain valve 14.

[0046] The following Figure 1 The illustrated embodiment is taken as an example to explain the working principle of the present invention in detail.

[0047] When quick freezing and preserving agricultural products, the temperature regulating mechanism 20 is first turned on to work normally to provide cold air for the quick freezing chamber 10. Specifically, the compressor 23 converts the liquid refrigerant into a gaseous refrigerant, absorbing a large amount of heat, and the condenser 21 outputs cold air, which enters the pipe of the conveyor belt 11, so that the surface of the conveyor belt 11 has a lower temperature.

[0048] The agricultural products to be quick-frozen are placed in the feed bin 12, and the agricultural products are evenly spread on the conveyor belt 11 from the feed bin 12. Since the surface temperature of the conveyor belt 11 is relatively low, the agricultural products can be quickly quick-frozen to achieve the preservation of the agricultural products. In this quick-freezing process, the first temperature sensor 27 is used to detect the temperature of the first pipeline 24, and the electronic expansion valve 26 automatically controls the flow 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 to detect 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 products, the direction of the four-way valve 22 is switched, and the compressor 23 converts the gaseous refrigerant into the liquid refrigerant, releasing a large amount of heat, and the evaporator 21 outputs hot air, which enters the pipeline of the conveyor belt 11 to appropriately increase the temperature of the conveyor belt 11 to prevent the surface temperature of the conveyor belt 11 from being lower than the condensation point temperature of the wax layer.

[0049] Furthermore, 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 and the low-temperature adhesive is introduced into the fifth pipeline 32. The water and the low-temperature adhesive are mixed and sprayed on the surface of the agricultural product through the second atomizing nozzle 31 to appropriately increase the temperature of the surface of the agricultural product to prevent the surface temperature of the agricultural product from being lower than the condensation point temperature of the wax layer.

[0050] After the agricultural products are quick-frozen, the conveyor belt 11 is opened to transport the quick-frozen agricultural products to the discharge port 13, and the anti-dewaxing effect of the agricultural products is tested at the discharge port 13. After the quick freezing is completed, the excess water in the quick freezing chamber 10 can be discharged through the drain valve 14.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quick freezing device for agricultural products, characterized in that: include: A quick freezing chamber, wherein a conveyor belt is arranged in the quick freezing chamber, wherein the conveyor belt is a tubular conveyor belt, and the quick freezing chamber is provided with a feed inlet, a discharge outlet and a drain valve; A temperature regulating mechanism, wherein the temperature regulating mechanism is connected to the quick freezing chamber or the conveyor belt; The temperature regulating mechanism comprises: a first temperature regulating branch, two ends of which are respectively connected to two ends of the pipeline of the conveyor belt; The first temperature regulating branch includes: a condenser or an evaporator, the condenser or the evaporator is connected to one end of the pipeline of the conveyor belt through a first pipeline; a four-way valve, the first interface of the four-way valve is connected to the condenser or the evaporator through a second pipeline, and the third interface of the four-way valve is connected to the other end of the pipeline of the conveyor belt; a compressor, the compressor is connected to the second interface and the fourth interface of the four-way valve; The second spray mechanism comprises: a fourth pipeline, a plurality of second atomizing nozzles are arranged on the fourth pipeline, and the second atomizing nozzles are located above the conveyor belt; and a fifth pipeline, the fifth pipeline is connected to the fourth pipeline.

2. The agricultural product quick freezing device according to claim 1, characterized in that: The first temperature regulating branch further includes an electronic expansion valve and a first temperature sensor, and the electronic expansion valve and the first temperature sensor are arranged in the first pipeline.

3. The agricultural product quick freezing device according to claim 1, characterized in that: The second spray mechanism further includes a plurality of electromagnetic regulating valves, which are respectively arranged in the fourth pipeline and the fifth pipeline.

4. The agricultural product quick freezing device according to claim 1, characterized in that: It also includes a plurality of second temperature sensors, wherein the second temperature sensors are arranged on the conveyor belt.

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