A flash freezer for frozen food products

Abstract

The utility model provides a quick freezing device for frozen food, solved the problem that the food is easy to appear uneven freezing in the freezing process. Still a first conveyor belt, part sets up in the freezing storehouse; No. 2 conveyor belt sets up below first conveyor belt; The turnover board sets up between first conveyor belt and no. 2 conveyor belt; Cold gas delivery pipe sets up above first conveyor belt, no. 2 conveyor belt respectively; The jet head sets up below cold gas delivery pipe, through -hole sets up on first conveyor belt and no. 2 conveyor belt respectively; The protruding part sets up on first conveyor belt and no. 2 conveyor belt and is located between through -hole. Place the food on first conveyor belt, the protruding part is used for supporting food, makes it and the surface of conveyor belt to have the gap, liquid nitrogen is sprayed out to the food and is frozen through the jet head, and the refrigerant can also act on the food bottom surface through the gap, then after the food is turned over through the turnover board and enters no. 2 conveyor belt again and is frozen.

Description

Technical Field

[0001] This utility model relates to the field of freezing equipment technology, specifically to a quick-freezing device for frozen food. Background Technology

[0002] With the rapid development of the food industry and the increasing demands of consumers for food freshness and quality, frozen foods are gaining a growing market share due to their advantages of long-term preservation, ease of transportation, and maximum retention of nutritional components. Quick-freezing technology, as a core component of the frozen food production chain, directly determines the final quality of frozen foods, including key indicators such as taste, color, nutrient retention rate, and shelf life. Therefore, efficient and high-quality quick-freezing equipment has become a key focus of research and development for food processing companies.

[0003] Currently, most commercially available quick-freezing equipment for frozen foods uses liquid nitrogen quick-freezing as its core technology. This technology utilizes the characteristic of liquid nitrogen absorbing a large amount of heat during vaporization to achieve rapid cooling. Compared to traditional air-cooled and water-cooled quick-freezing methods, it has advantages such as faster cooling speed, better temperature uniformity, and less damage to food cells. However, quick-freezing equipment still has shortcomings in practical applications. Because the food remains in a fixed position in contact with the cold air during the quick-freezing process, the heat exchange efficiency on the side of the food in contact with the conveyor belt is low, easily leading to uneven quick-freezing. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a quick-freezing device for frozen food, which solves the problem of uneven freezing of food during the freezing process.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A quick-freezing apparatus for frozen food includes a freezing chamber, the top of which is equipped with a liquid nitrogen generator, and further includes:

[0007] Conveyor belt number one is partially located inside the cold storage compartment;

[0008] Conveyor belt number two is located below conveyor belt number one;

[0009] The tilting plate is located between the discharge end of conveyor belt 1 and the inlet end of conveyor belt 2.

[0010] Cold air delivery pipes are installed above conveyor belts No. 1 and No. 2 and connected to the liquid nitrogen generator.

[0011] The jet nozzle is located below the cold air delivery pipe;

[0012] Through holes are respectively installed on conveyor belt No. 1 and conveyor belt No. 2;

[0013] The protrusions are respectively set on the No. 1 conveyor belt and the No. 2 conveyor belt and located between the through holes.

[0014] The protrusion is hemispherical, and the front and rear protrusions are arranged alternately.

[0015] The outside of the freezer compartment is equipped with a collection frame, which is located below the first conveyor belt. The collection frame is connected in sequence to a gas-liquid separator and a vacuum pump.

[0016] Several of the aforementioned jet heads are evenly arranged on the cold air delivery pipe.

[0017] A reflector plate is installed below the No. 2 conveyor belt.

[0018] The flip plate includes an arc-shaped plate, baffles on both sides of the arc-shaped plate, and a guide plate located above the arc-shaped plate.

[0019] Both conveyor belt No. 1 and conveyor belt No. 2 are stainless steel chain conveyor belts.

[0020] The beneficial effects of this utility model are:

[0021] Food is placed on conveyor belt number one, with protrusions supporting it and leaving a gap between it and the surface of the conveyor belt. As conveyor belt number one moves, liquid nitrogen is sprayed from the jet nozzle through the cold air delivery pipe to freeze the food. Refrigerant can also act on the bottom surface of the food through the gap. Then, the food is turned over by the flipping plate and enters conveyor belt number two for refreezing. Finally, it is sent out from the freezer compartment. This device can not only freeze the food evenly, but also prevent it from freezing on the conveyor belt. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the present invention.

[0023] Figure 2 This is a top view schematic diagram of the No. 1 conveyor belt of this utility model.

[0024] Figure 3 This is a cross-sectional schematic diagram of the No. 1 conveyor belt of this utility model.

[0025] Figure 4 This is a schematic diagram of the flip plate of this utility model.

[0026] 1. Freezing chamber; 2. Liquid nitrogen generator; 3. Conveyor belt 1; 4. Tilting plate; 5. Arc plate; 51. Baffle; 52. Guide plate; 53. Cold air delivery pipe; 6. Jet nozzle; 7. Through hole; 8. Protrusion; 9. Collection frame; 10. Gas-liquid separator; 11. Air pump; 12. Reflector; 13. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] In the embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, a quick-freezing device for frozen food includes a freezing chamber 1, a liquid nitrogen generator 2 mounted on top of the freezing chamber 1, and further includes:

[0029] Conveyor belt 3 is partially installed inside freezer compartment 1;

[0030] Conveyor belt 4 is located below conveyor belt 3;

[0031] The tilting plate 5 is set between the discharge end of the first conveyor belt 3 and the inlet end of the second conveyor belt 4.

[0032] Cold air delivery pipes 6 are respectively installed above conveyor belt 3 and conveyor belt 4 and connected to liquid nitrogen generator 2;

[0033] The jet head 7 is located below the cold air delivery pipe 6;

[0034] Through holes 8 are respectively installed on conveyor belt 3 and conveyor belt 4;

[0035] The protrusions 9 are respectively set on the first conveyor belt 3 and the second conveyor belt 4 and located between the through holes 8.

[0036] Food (aquatic products) is placed on conveyor belt 3. The protrusion 9 supports the food and leaves a gap between it and the surface of the conveyor belt. When conveyor belt 3 moves, liquid nitrogen is sprayed from the jet nozzle 7 through the cold air delivery pipe 6 to freeze the food. The refrigerant can also act on the bottom surface of the food through the gap. Then, the food is turned over by the flipping plate 5 and enters the second conveyor belt 4 for refreezing. Finally, it is sent out from the freezing chamber 1. This device can not only freeze the food evenly, but also prevent it from freezing on the conveyor belt.

[0037] In the embodiments, such as Figure 2 , Figure 3 As shown, the protrusion 9 is hemispherical, and the front and rear protrusions 9 are arranged alternately. This supports the food while reducing the contact area with the bottom of the food, effectively reducing the possibility of the side of the food in contact with the first conveyor belt 3 freezing.

[0038] In the embodiments, such as Figure 1As shown, a collection frame 10 is provided on the outside of the freezing chamber 1. The collection frame 10 is located below the first conveyor belt 3. The collection frame 10 is connected in sequence to a gas-liquid separator 11 and a vacuum pump 12. The vacuum pump 12 extracts the moisture remaining at the bottom of the food before the food enters the freezing chamber 1, and then the gas-liquid separator 11 separates the liquid and gas to prevent the food from freezing on the first conveyor belt 3 as much as possible.

[0039] In the embodiments, such as Figure 1 As shown, several of the jet nozzles 7 are evenly arranged on the cold air delivery pipe 6. This ensures that liquid nitrogen is delivered evenly, thus ensuring uniform freezing of the food.

[0040] In the embodiments, such as Figure 1 As shown, a reflector plate 13 is provided below the second conveyor belt 4. The reflector plate 13 acts as a barrier to the downward flow of liquid nitrogen, thereby improving the utilization rate of liquid nitrogen.

[0041] In the embodiments, such as Figure 4 As shown, the flip plate 5 includes an arc-shaped plate 51, baffles 52 disposed on both sides of the arc-shaped plate 51, and a guide plate 53 located above the arc-shaped plate 51. Food can reach the arc-shaped plate 51 along the guide plate 53, and the baffles 52 are used to prevent food from falling off the flip plate 5.

[0042] In this embodiment, both conveyor belt 3 and conveyor belt 4 are stainless steel chain conveyor belts. Stainless steel chain conveyors have good corrosion resistance and wear resistance, are easy to clean and maintain, have a stable structure, and a long service life.

[0043] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A quick-freezing apparatus for frozen food, comprising a freezing chamber (1), wherein a liquid nitrogen generator (2) is provided on the top of the freezing chamber (1), characterized in that, Also includes: Conveyor belt No. 1 (3) is partially installed inside the cold storage (1); Conveyor belt No. 2 (4) is located below conveyor belt No. 1 (3); The tilting plate (5) is set between the discharge end of the first conveyor belt (3) and the feed end of the second conveyor belt (4); Cold air delivery pipes (6) are respectively installed above the No. 1 conveyor belt (3) and the No. 2 conveyor belt (4) and connected to the liquid nitrogen generator (2); The jet head (7) is located below the cold air delivery pipe (6); Through holes (8) are respectively set on conveyor belt 1 (3) and conveyor belt 2 (4); The protrusions (9) are respectively set on the first conveyor belt (3) and the second conveyor belt (4) and located between the through holes (8).

2. The quick-freezing apparatus for frozen food as described in claim 1, characterized in that: The protrusion (9) is hemispherical, and the front and rear protrusions (9) are arranged alternately.

3. A quick-freezing apparatus for frozen food as described in claim 1, characterized in that: The outside of the freezing chamber (1) is provided with a collection frame (10), which is located below the first conveyor belt (3). The collection frame (10) is connected in sequence to a gas-liquid separator (11) and a vacuum pump (12).

4. A quick-freezing apparatus for frozen food as described in claim 1, characterized in that: Several of the jet heads (7) are evenly arranged on the cold air delivery pipe (6).

5. A quick-freezing apparatus for frozen food as described in claim 1, characterized in that: A reflector plate (13) is provided below the second conveyor belt (4).

6. A quick-freezing apparatus for frozen food as described in claim 1, characterized in that: The flip plate (5) includes an arc plate (51), baffles (52) disposed on both sides of the arc plate (51), and a guide plate (53) located above the arc plate (51).

7. A quick-freezing apparatus for frozen food as described in claim 1, characterized in that: Both conveyor belt No. 1 (3) and conveyor belt No. 2 (4) are stainless steel chain conveyor belts.

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