Food fresh-keeping low-temperature quick-freezing equipment
The low-temperature freezing device addresses uneven freezing and inefficient energy use by using a movable rack system with a liquid nitrogen pump and insulation, achieving rapid and uniform freezing with reduced energy consumption and improved operational efficiency.
Patent Information
- Application Number
- CN202311597292.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-23
- Publication Date
- 2025-07-15
AI Technical Summary
Existing quick-freezing equipment has problems such as uneven quick-freezing, waste of energy and low working efficiency, especially when food is floating or piled up, resulting in uneven freezing, affecting the quality of frozen products.
A low-temperature quick-freezing equipment including the body of the refrigeration equipment, a quick-freezing compartment, a mobile food placement rack, a liquid nitrogen pump and a liquid nitrogen nozzle are designed. The universal roller and breathable hole design of the mobile food placement rack, combined with the insulation layer of the sealing door and a silicone sealing strip, can achieve fast and uniform quick-freezing of food.
It improves the quick freezing efficiency, saves time and energy consumption, realizes uniform quick freezing and flexible movement of food, and improves the working efficiency of the equipment.
Smart Images
Figure CN120313271A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of quick-freezing and fresh-keeping technology, and particularly relates to a low-temperature quick-freezing device for food fresh-keeping. Background Art
[0002] Food freezing is a common method in the processes of food processing and storage. Food freezing technology and freezing equipment are widely used in the production, transportation and storage processes of perishable foods such as meat, poultry, aquatic products, milk, eggs, vegetables and fruits. Frozen foods have better preservation of nutrients, are convenient to take, are not easy to deteriorate, are hygienic and economical to eat. The ways of food freezing are divided into low-temperature air freezing, spraying freezing liquid, and immersing in freezing liquid. In order to retain the original nutrients and flavors of food as much as possible, spraying freezing liquid and immersing in freezing liquid are often adopted to shorten the food freezing time.
[0003] By placing food in a low-temperature environment, food freezing can effectively extend the shelf life of food and maintain its nutritional value and taste. The main functions of food freezing are as follows: First, extend the shelf life of food. The most important function of food freezing is to extend the shelf life of food. By placing food in a low-temperature environment, the reproduction speed of microorganisms can be reduced and the process of food spoilage can be slowed down. The low-temperature environment can slow down the activity of enzymes in food and reduce the growth speed of microorganisms, thus effectively extending the shelf life of food. During the freezing process, the water in food will form ice crystals, and the formation of ice crystals will imprison microorganisms and slow down the activity of microorganisms and the reaction speed of enzymes. The freezing process can reduce the activity of microorganisms to the lowest level, thus preventing food from deteriorating. Especially for perishable foods, food freezing is an ideal method to maintain their freshness and extend the shelf life. Second, maintain the nutritional value of food. Food freezing is very important for maintaining the nutritional value of food. Low temperature can reduce the activity of enzymes and slow down the decomposition speed of nutrients in food, thus maintaining the integrity of vitamins, minerals and other nutritional components in food.
[0004] In the prior art, most quick-freezing devices spray freezing liquid (including liquid nitrogen, liquid carbon dioxide, etc.) on food, but due to the stacking of food containers, the quick-freezing is uneven and the quick-freezing effect is poor; there are also some quick-freezing devices that immerse food in low-temperature freezing liquid, but there is a situation where the food floats and cannot be completely immersed, resulting in uneven freezing and affecting the quality of frozen products. In addition, when quick-freezing food, the food needs to be gradually put into the quick-freezing device and then gradually taken out after the quick-freezing is completed. During the period when the food is put in and taken out, the quick-freezing device runs, wasting energy in vain and making the working efficiency of the quick-freezing device low. Therefore, it is necessary to design a new type of low-temperature quick-freezing device. Summary of the Invention
[0005] In view of the defects in the prior art, the present invention provides a low-temperature quick-freezing device for food fresh-keeping.
[0006] The technical solution adopted by the present invention is as follows: A food preservation low-temperature quick-freezing device, including a freezing device body and a quick-freezing chamber arranged on the side of the freezing device body. A quick-freezing cavity is arranged in the quick-freezing chamber, and a movable food placement rack is fitted in the quick-freezing cavity; A sealing door is hinged on the side of the quick-freezing chamber; A liquid nitrogen pump is arranged on the top of the quick-freezing chamber, and the liquid nitrogen pump is connected with a liquid nitrogen spray pipe extending into the quick-freezing chamber; First universal rollers are arranged at the bottom of the freezing device body and the bottom of the quick-freezing chamber.
[0007] To better implement the present invention, the movable food placement rack includes a bottom square frame and a top square frame. A plurality of vertical frames are arranged between the bottom square frame and the top square frame, and a plurality of food placement frames are fitted between adjacent two vertical frames; Second universal rollers for convenient movement are arranged at the bottom of the bottom square frame.
[0008] To better implement the present invention, each group of the vertical frames includes two vertical rods, and a plurality of mutually parallel cross rods are arranged between the two vertical rods.
[0009] To better implement the present invention, two hooks are arranged on both sides of the food placement frame, and the hooks are hung on the cross rods.
[0010] To better implement the present invention, the hooks are arc-shaped, and the cross rods are cylindrical.
[0011] To better implement the present invention, a handle for convenient gripping is arranged on the side of the food placement frame.
[0012] To better implement the present invention, air holes are arranged at the bottom and side of the food placement frame.
[0013] To better implement the present invention, a heat preservation layer is arranged on the inner side of the sealing door.
[0014] To better implement the present invention, a silica gel sealing strip is arranged at the inner edge position of the sealing door.
[0015] To better implement the present invention, heat dissipation louvers, a control panel, a display screen and a cold air blower fan are arranged on the freezing device body.
[0016] The beneficial effects of the present invention are reflected in: A food fresh-keeping low-temperature quick-freezing device of the present invention, through the cooperation of a freezing device body, a quick-freezing chamber, a quick-freezing cavity, a movable food placement rack, a sealing door, a liquid nitrogen pump, a liquid nitrogen spray pipe, and the first universal rollers, etc. When in use, the entire device can be moved to a suitable place according to the situation needs, the food is placed on the movable food placement rack, and then the entire movable food placement rack is placed into the quick-freezing cavity, the sealing door is closed and the device is started, the liquid nitrogen pump is started to start quick-freezing. After the quick-freezing is completed, the entire movable food placement rack is directly taken out for unloading, and other movable food placement racks loaded with food are replaced to continue quick-freezing, which can greatly save time, improve the quick-freezing efficiency, and is convenient and flexible to move.
[0017] The movable food placement rack includes a bottom square frame and a top square frame. Between the bottom square frame and the top square frame, multiple groups of vertical frames are provided, and multiple food placement frames are cooperated between adjacent two vertical frames; at the bottom of the bottom square frame, second universal rollers for convenient movement are provided. After such a design, the food to be quick-frozen can be pre-placed in the food placement frame, and then the food placement frame is placed on the vertical frame, the movable food placement rack is pushed to the position of the quick-freezing device, the entire movable food placement rack is placed into the quick-freezing cavity for quick-freezing. After the quick-freezing is completed, the entire movable food placement rack is directly taken out for unloading, and other movable food placement racks loaded with food are replaced to continue quick-freezing, which can greatly save time, improve the quick-freezing efficiency, and is convenient and flexible to move. It should be noted that inclined plates can be provided on the outer and inner sides of the bottom of the quick-freezing cavity to facilitate the second universal rollers to enter and exit the quick-freezing cavity along the inclined plates.
[0018] The vertical frame includes two vertical rods, and multiple mutually parallel cross rods are provided between the two vertical rods. Two hooks are provided on both sides of the food placement frame, and the hooks are hung on the cross rods. After such a design, after the food placement frame is loaded with food, the staff can lift the food placement frame and let the hooks on both sides be respectively hung on the corresponding cross rods on both sides, which is quite convenient.
[0019] The hook is arc-shaped, and the cross rod is cylindrical. After such a design, the arc-shaped hook can cooperate with the cylindrical cross rod smoothly, which is convenient for the hook to slide along the cross rod and reduces wear.
[0020] A handle for convenient gripping is provided on the side of the food placement frame. When the handle is not provided, the staff needs to hold the food placement frame for placement, or hold the two hooks on the diagonal for placement, and the operation is slightly inconvenient. After the handle is provided, the entire food placement frame can be directly lifted by holding the handle and placed on the movable food placement rack, which is more convenient.
[0021] Vent holes are provided at the bottom and side of the food placement frame. After such a design, it can facilitate the penetration of nitrogen and evenly quick-freeze the food in the food placement frame.
[0022] A heat-insulating layer is provided on the inner side of the sealed door. The heat-insulating layer can isolate external heat conduction, reduce cold air loss, and save energy consumption.
[0023] A silica gel sealing strip is provided at the inner edge position of the sealed door. The silica gel sealing strip can play a good sealing role. At the same time, the silica gel sealing strip is more resistant to freezing than the rubber sealing strip, reducing cold air loss and saving energy consumption. Brief Description of the Drawings
[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0025] Figure 1 It is a schematic structural diagram of a food preservation and low-temperature quick-freezing device of the present invention;
[0026] Figure 2 It is a schematic structural diagram of taking out and moving a food placement rack of a food preservation and low-temperature quick-freezing device of the present invention;
[0027] Figure 3 It is a schematic structural diagram of a moving food placement rack of a food preservation and low-temperature quick-freezing device of the present invention;
[0028] Figure 4 It is a schematic structural diagram of a food placement frame of a food preservation and low-temperature quick-freezing device of the present invention;
[0029] In the drawings, 1 - freezing equipment body, 2 - quick-freezing chamber, 3 - quick-freezing cavity, 4 - sealed door, 5 - moving food placement rack, 6 - cold air blower fan, 7 - heat dissipation louvers, 8 - control panel, 9 - display screen, 10 - first universal wheel, 11 - heat-insulating layer, 12 - silica gel sealing strip, 13 - liquid nitrogen pump, 14 - liquid nitrogen spray pipe, 15 - bottom square frame, 16 - top square frame, 17 - second universal wheel, 18 - vertical rod, 19 - cross bar, 20 - food placement frame, 21 - hook, 22 - handle, 23 - ventilation hole. Detailed Embodiments
[0030] The following will describe in detail the embodiments of the technical solutions of the present invention in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.
[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Components of the embodiments of the present disclosure usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0032] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "inner", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the disclosed product is usually placed during use. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present disclosure. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.
[0034] It should be noted that unless otherwise stated, the technical terms or scientific terms used in this application should be of the ordinary meaning understood by those skilled in the art to which the present invention pertains.
[0035] Embodiment:
[0036] Such as Figures 1 to 4As shown in the figure, a food preservation low-temperature quick-freezing device of the present invention includes a freezing device body 1 and a quick-freezing chamber 2 arranged on the side of the freezing device body 1. A quick-freezing cavity 3 is arranged in the quick-freezing chamber 2, and a movable food placement rack 5 is fitted in the quick-freezing cavity 3. A sealing door 4 is hinged on the side of the quick-freezing chamber 2. A liquid nitrogen pump 13 is arranged on the top of the quick-freezing chamber 2, and the liquid nitrogen pump 13 is connected with a liquid nitrogen spray pipe 14 extending into the quick-freezing chamber 2. First universal wheels 10 are arranged at the bottom of the freezing device body 1 and the bottom of the quick-freezing chamber 2. For the food preservation low-temperature quick-freezing device of the present invention, through the cooperation of the freezing device body 1, the quick-freezing chamber 2, the quick-freezing cavity 3, the movable food placement rack 5, the sealing door 4, the liquid nitrogen pump 13, the liquid nitrogen spray pipe 14 and the first universal wheels 10, etc., during use, the whole device can be moved to a suitable place according to the situation needs, the food is placed on the movable food placement rack 5, then the whole movable food placement rack 5 is placed into the quick-freezing cavity 3, the sealing door 4 is closed to start the device, the liquid nitrogen pump 13 is started to start quick-freezing. After the quick-freezing is completed, the whole movable food placement rack 5 is directly taken out for unloading, and another movable food placement rack 5 loaded with food is replaced to continue quick-freezing, which can greatly save time, improve the quick-freezing efficiency, and is convenient and flexible to move.
[0037] As a preferred embodiment, the movable food placement rack 5 includes a bottom square frame 15 and a top square frame 16. A plurality of vertical frames are arranged between the bottom square frame 15 and the top square frame 16, and a plurality of food placement frames 20 are fitted between two adjacent vertical frames. Second universal wheels 17 for convenient movement are arranged at the bottom of the bottom square frame 15. In this embodiment, the movable food placement rack 5 includes a bottom square frame 15 and a top square frame 16. A plurality of vertical frames are arranged between the bottom square frame 15 and the top square frame 16, and a plurality of food placement frames 20 are fitted between two adjacent vertical frames. Second universal wheels 17 for convenient movement are arranged at the bottom of the bottom square frame 15. After such design, the food to be quick-frozen can be placed in the food placement frame 20 in advance, then the food placement frame 20 is placed on the vertical frame, the movable food placement rack 5 is pushed to the position of the quick-freezing device, the whole movable food placement rack 5 is placed into the quick-freezing cavity 3 for quick-freezing. After the quick-freezing is completed, the whole movable food placement rack 3 is directly taken out for unloading, and another movable food placement rack 5 loaded with food is replaced to continue quick-freezing, which can greatly save time, improve the quick-freezing efficiency, and is convenient and flexible to move. It should be noted that inclined plates can be arranged on the outer and inner sides of the bottom of the quick-freezing cavity 3 to facilitate the second universal wheels 17 to enter and exit the quick-freezing cavity 3 along the inclined plates.
[0038] As a preferred embodiment, each set of the vertical frames includes two vertical rods 18, and a plurality of mutually parallel cross rods 19 are arranged between the two vertical rods 18. Two hooks 21 are arranged on both sides of the food placement frame 20, and the hooks 21 are hung on the cross rods 19. In this embodiment, the vertical frame includes two vertical rods 18, and a plurality of mutually parallel cross rods 19 are arranged between the two vertical rods 18. Two hooks 21 are arranged on both sides of the food placement frame 20, and the hooks 21 are hung on the cross rods 19. After such a design, after the food placement frame 20 is loaded with food, the staff can lift the food placement frame 20 and let the hooks 21 on both sides be respectively hung on the cross rods 19 on the corresponding side, which is quite convenient.
[0039] As a preferred embodiment, the hook 21 is arc-shaped and the cross rod 19 is cylindrical. In this embodiment, the hook 21 is arc-shaped and the cross rod 19 is cylindrical. After such a design, the arc-shaped hook 21 can cooperate smoothly with the cylindrical cross rod 19, which is convenient for the hook 21 to slide along the cross rod 19 and reduces wear.
[0040] As a preferred embodiment, a handle 22 convenient for gripping is arranged on the side of the food placement frame 20. In this embodiment, a handle 22 convenient for gripping is arranged on the side of the food placement frame 20. When the handle 22 is not provided, the staff needs to hold the food placement frame 20 for placement, or hold the two hooks 21 on the diagonal for placement, and the operation is slightly inconvenient. After the handle 22 is provided, the entire food placement frame 20 can be directly lifted by holding the handle 22 and placed on the mobile food placement rack 5, which is more convenient.
[0041] As a preferred embodiment, air holes 23 are arranged at the bottom and side of the food placement frame 20. In this embodiment, air holes 23 are arranged at the bottom and side of the food placement frame 20. After such a design, it is convenient for nitrogen to penetrate and quickly freeze the food in the food placement frame 20 evenly.
[0042] As a preferred embodiment, a heat insulation layer 11 is arranged on the inner side of the sealing door 4. In this embodiment, a heat insulation layer 11 is arranged on the inner side of the sealing door 4. The heat insulation layer 11 can isolate external heat conduction, reduce cold air loss, and save energy consumption. The heat insulation layer 11 can be a rubber shell filled with materials such as foam and cotton inside.
[0043] As a preferred embodiment, a silica gel sealing strip 12 is arranged at the inner edge position of the sealing door 4. In this embodiment, a silica gel sealing strip 12 is arranged at the inner edge position of the sealing door 4. The silica gel sealing strip 12 can play a good sealing role. At the same time, the silica gel sealing strip 12 is more freeze-resistant than the rubber sealing strip, reducing cold air loss and saving energy consumption.
[0044] As a preferred embodiment, heat dissipation louvers 7, a control panel 8, a display screen 9, and a cold air blower fan 6 are provided on the refrigeration equipment body 1. In this embodiment, heat dissipation louvers 7, a control panel 8, a display screen 9, and a cold air blower fan 6 are provided on the refrigeration equipment body 1. Before liquid nitrogen freezing, the refrigeration equipment body 1 can be used for pre-cooling treatment. The movable food placement rack 5 containing food is placed in the quick-freezing cavity 3. At this time, the liquid nitrogen pump 13 is not turned on, but the cold air blower fan 6 is turned on on the control panel 8 to make the refrigeration equipment body 1 work, pre-cool the food in the quick-freezing cavity 3, and reduce the temperature of the food to a relatively low level so as to better meet the temperature requirements of liquid nitrogen freezing. The control panel 8 is provided with various function buttons such as switches, timers, and pauses. The display screen 9 is used to display parameter information such as the temperature and time in the quick-freezing cavity 3. The heat dissipation louvers 7 are used for heat dissipation.
[0045] Liquid nitrogen freezing of food is a commonly used food freezing technology, and its working process can be briefly summarized as follows: First, food preparation: First, prepare the food to be frozen, including steps such as peeling, cutting, and cleaning to ensure the quality and hygiene of the food. Second, pre-cooling treatment: Before liquid nitrogen freezing, it is usually necessary to pre-cool the food. This can be achieved by placing the food in a low-temperature cold storage room or using a low-temperature blower for pre-cooling. The purpose is to reduce the temperature of the food to a relatively low level so as to better meet the temperature requirements of liquid nitrogen freezing. Third, liquid nitrogen freezing: The food enters the liquid nitrogen freezing chamber, and the temperature in the chamber is usually between -140°C and -196°C. Liquid nitrogen is sprayed into the freezing chamber, and the food quickly comes into contact with the low temperature of the liquid nitrogen and is quickly frozen, achieving a rapid freezing effect. When liquid nitrogen freezes, a freezing layer may form on the surface of the food, which will not cause too much impact on the inside of the food. Fourth, packaging and storage: After the frozen food is frozen with liquid nitrogen, it is usually packaged, such as bagged or packaged in a freezing box, to avoid contamination and the influence of oxygen on the food, and at the same time it is convenient for storage and transportation. The frozen food is usually stored in a low-temperature freezer to ensure quality and freshness. It should be noted that liquid nitrogen freezing is a very fast and efficient freezing method, which can quickly cool the temperature of the food to an extremely low level in a short time, which helps to maintain the original fragrance, taste, and nutritional value of the food. This method is widely used in the fields of food processing, logistics and storage, etc.
[0046] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the specification of the present invention.
Claims
1. A food fresh-keeping low-temperature quick-freezing device, characterized in that: It includes a freezing equipment body (1) and a quick-freezing chamber (2) arranged on the side of the freezing equipment body (1). A quick-freezing cavity (3) is arranged in the quick-freezing chamber (2), and a movable food placement rack (5) is fitted in the quick-freezing cavity (3); a sealing door (4) is hinged on the side of the quick-freezing chamber (2); a liquid nitrogen pump (13) is arranged on the top of the quick-freezing chamber (2), and the liquid nitrogen pump (13) is connected with a liquid nitrogen spray pipe (14) extending into the quick-freezing chamber (2); first universal rollers (10) are arranged at the bottom of the freezing equipment body (1) and the bottom of the quick-freezing chamber (2).
2. The low-temperature quick-freezing device for food preservation according to claim 1, wherein: The movable food placement rack (5) includes a bottom square frame (15) and a top square frame (16). A plurality of vertical frames are arranged between the bottom square frame (15) and the top square frame (16), and a plurality of food placement frames (20) are fitted between adjacent two vertical frames; second universal rollers (17) for facilitating movement are arranged at the bottom of the bottom square frame (15).
3. The low-temperature quick-freezing device for food preservation according to claim 2, characterized in that: Each group of the vertical frames includes two vertical rods (18), and a plurality of mutually parallel cross rods (19) are arranged between the two vertical rods (18).
4. A food preservation low-temperature quick-freezing device according to claim 3, characterized in that: Two hooks (21) are arranged on both sides of the food placement frame (20), and the hooks (21) are hung on the cross rods (19).
5. A food preservation low-temperature quick-freezing device according to claim 4, characterized in that: The hooks (21) are arc-shaped, and the cross rods (19) are cylindrical.
6. The food fresh-keeping low-temperature quick-freezing device according to claim 5, wherein: A handle (22) for facilitating gripping is arranged on the side of the food placement frame (20).
7. The food fresh-keeping low-temperature quick-freezing device according to claim 6, characterized in that: Vent holes (23) are arranged at the bottom and the side of the food placement frame (20).
8. A food fresh-keeping low-temperature quick-freezing device according to claim 1, characterized in that: A heat insulation layer (11) is arranged on the inner side of the sealing door (4).
9. A food fresh-keeping low-temperature quick-freezing device according to claim 8, characterized in that: A silica gel sealing strip (12) is arranged at the inner edge position of the sealing door (4).
10. A food preservation low-temperature quick-freezing device according to claim 1, characterized in that: A heat dissipation louver (7), a control panel (8), a display screen (9) and a cold air blower fan (6) are arranged on the freezing equipment body (1).