Forced ventilation pre-refrigeration storage for partial freezing preservation of aquatic products

Abstract

The forced ventilation pre-cooling storage comprises a storage body, a left partition plate and a right partition plate are arranged in the storage body, the space in the storage body is divided into a left pre-cooling area, a freezing area and a right pre-cooling area by the left partition plate and the right partition plate, and a cold air circulating pipe is arranged at the top of the storage body; the two ends of the cold air circulating pipe are communicated with the left pre-cooling area and the right pre-cooling area respectively, the cold air circulating pipe is connected with a communicating branch pipe communicated with the freezing area, a goods shelf is arranged in the freezing area, a coil pipe type evaporator is arranged on the inner wall of the freezing area, and a left fin type evaporator and a right fin type evaporator are arranged in the left pre-cooling area and the right pre-cooling area respectively. A left fan and a right fan are arranged below the left finned evaporator and the right finned evaporator, the left pre-cooling area is communicated with the freezing area through a left circulation opening, and the right pre-cooling area is communicated with the freezing area through a right circulation opening which is formed in the right partition plate and located below the right fan. The refrigerator is high in refrigerating speed, free of freezing dead angles, uniform in refrigerating capacity distribution and good in refrigerating effect.

Description

Technical Field

[0001] The invention relates to a cold storage, in particular to a forced ventilation pre-cooling storage for slightly freezing and preserving aquatic products. Background Art

[0002] In the actual transportation, storage and sales of aquatic products, they are easily affected by factors such as ambient temperature and microorganisms, which can lead to spoilage, waste of resources, environmental pollution and other problems. Micro-freezing is to control the storage temperature of aquatic products within a temperature range of 1 to 2°C below its freezing point, which is about -1 to -4°C, depending on the specific product. Micro-freezing only produces a small amount of ice crystals, the degree of cell damage is small, the juice loss rate is low, and micro-freezing consumes less energy for preservation and has a lower cost, which can extend the shelf life of aquatic products to 1.5 to 4 times that of refrigeration.

[0003] Since the micro-freezing temperature is below the freezing point of aquatic products, the storage process is accompanied by the freezing of water and the formation of ice crystals. Therefore, the seafood must be quickly pre-cooled before micro-freezing to remove the sensible heat from the initial temperature to the initial freezing point. At present, rapid pre-cooling of aquatic products is usually carried out in a conventional pre-cooling warehouse. The aquatic products are packed in corrugated boxes and then placed on the shelves in the pre-cooling warehouse in brick-shaped packaging for pre-cooling. For example, the Chinese patent with the authorization announcement number: CN219511099U and the authorization announcement date of August 11, 2023 discloses a pre-cooling warehouse for food processing, including an insulated warehouse body and a refrigeration device installed on the top of the insulated warehouse body. The front of the insulated warehouse body is provided with evenly distributed reserved warehouse doors, and the bottom of the inner wall of the insulated warehouse is fixedly provided with a directional slide rail corresponding to the reserved warehouse door one by one. The directional slide rail is slidably connected with a pre-cooling shelf assembly, and the pre-cooling shelf assembly includes a slide and a front sealed warehouse door fixedly arranged at one end of the slide, and a rear sealed warehouse door is fixedly arranged at the other end of the slide. The pre-cooling storage has at least the following defects when in use: the pre-cooling storage is a direct cooling cold storage, the air in the cold storage is natural convection, the refrigeration speed is slow, and the cold capacity is unevenly distributed, there are freezing dead corners, and the refrigeration effect is poor. Summary of the invention

[0004] The present invention aims to solve the above problems existing in the prior art pre-cooling warehouse, and provides a forced ventilation pre-cooling warehouse for slightly freezing and preserving aquatic products, which has fast refrigeration speed, no freezing dead corners, uniform cold capacity distribution and good refrigeration effect.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a forced ventilation precooling warehouse for micro-freezing and fresh-keeping of seafood of the present invention comprises a warehouse body, a left partition and a right partition are arranged in the warehouse body, the left partition and the right partition divide the space in the warehouse body into three areas: a left precooling area, a freezing area and a right precooling area, a cold air circulation pipe is arranged on the top of the warehouse body, the two ends of the cold air circulation pipe are respectively connected with the left precooling area and the right precooling area, a connecting branch pipe connected with the freezing area is connected to the cold air circulation pipe, a shelf is arranged in the freezing area, a coil evaporator is arranged on the inner wall of the freezing area, a left fin evaporator and a right fin evaporator are respectively arranged in the left precooling area and the right precooling room, a left fan and a right fan are respectively arranged below the left fin evaporator and the right fin evaporator, the left precooling area is connected with the freezing area through a left flow port arranged on the left partition and located below the left fan, and the right precooling area is connected with the freezing area through a right flow port arranged on the right partition and located below the right fan. The present invention divides a warehouse into three areas: a left pre-cooling area, a freezing area, and a right pre-cooling area. The left pre-cooling area and the right pre-cooling area pre-cool the air, and at the same time, the cold air in the freezing area can form a forced convection circulation, thereby improving the refrigeration efficiency and refrigeration effect of the freezing area, so that the cold air can be evenly distributed throughout the freezing area, and the cold amount in the freezing area is evenly distributed; the cold air circulation pipe is arranged on the top of the warehouse, and the characteristics of high cold air density and low hot air density can be used to make the upper cold air sink quickly, and the lower hot air can be quickly driven into the left pre-cooling area and the right pre-cooling area through the left flow port and the right flow port for pre-cooling, which is beneficial to improving the circulation efficiency and speed; the fan forces the cold air to circulate.

[0006] Preferably, a wind distribution plate is provided on the top of the freezing zone, a wind distribution chamber is formed between the wind distribution plate and the top plate of the storage body, the connecting branch pipe is connected to the wind distribution chamber, and wind distribution holes are provided on the wind distribution plate. The wind distribution chamber plays a role of buffering and redistribution, so that the cold air can enter the freezing zone evenly through the wind distribution holes to reduce the interference with the temperature of the freezing zone, which is conducive to maintaining the stability of the temperature of the freezing zone and preventing the cold air from passing through the freezing zone quickly without sufficient heat exchange.

[0007] Preferably, a left air duct is provided above the left precooling zone, and a right air duct is provided above the right precooling zone, and both the left and right air ducts are round and square, the upper outlet of the left air duct is connected to the cold air circulation pipe, the lower inlet edge of the left air duct is fixedly connected to the inner wall of the left precooling zone, the upper outlet of the right air duct is connected to the cold air circulation pipe, and the lower inlet edge of the right air duct is fixedly connected to the inner wall of the right precooling zone. The left and right air ducts play a guiding role, so that the cold air in the left and right precooling zones can be concentrated and quickly enter the cold air circulation pipe.

[0008] Preferably, the bottom corners of the left precooling zone and the right precooling zone are both provided with arc-shaped guide plates, and the concave surface of the arc-shaped guide plates faces the freezing zone. The arc-shaped guide plates play a guiding role, so that there are no dead corners in the left precooling zone and the right precooling zone, and the wind resistance is reduced.

[0009] Preferably, the shelf comprises a bracket and a shelf plate arranged on the bracket at intervals in the longitudinal direction, and the shelf plate is provided with a floating lifting mechanism capable of lifting the aquatic product package to separate from the shelf plate. Water is inevitably present on the aquatic product package or the shelf plate, and when the water freezes during the precooling process, the aquatic product package and the shelf plate are frozen together, making it inconvenient to take out the aquatic product package. Therefore, in the present invention, the aquatic product package is lifted up by the floating lifting mechanism, so that the aquatic product package is separated from the shelf plate to facilitate the removal of the aquatic product package.

[0010] Preferably, the floating lifting mechanism includes an eccentric wheel shaft, a top plate receiving groove is provided at intervals on the shelf plate, a sliding cavity is provided in the shelf plate below the top plate receiving groove, a left wedge block and a right wedge block are relatively arranged in the sliding cavity, a left wedge surface and a right wedge surface are provided on the opposite surfaces of the left wedge block and the right wedge block, a compression spring is provided between the left wedge block and the sliding cavity, and between the right wedge block and the sliding cavity, a wedge surface top block is provided in the shelf plate, and an extrusion wedge surface that matches the left wedge surface and the right wedge surface is provided on the upper end of the wedge surface top block, and the eccentric wheel shaft is rotatably connected to the bracket An eccentric wheel is arranged on the eccentric wheel shaft, the eccentric wheel contacts the lower end of the wedge surface top block, a top plate is arranged in the top plate accommodating groove, guide holes connected with the sliding cavity are arranged on both sides of the groove bottom of the top plate accommodating groove, lifting wedge blocks are fixed on both sides of the bottom surface of the top plate, the lifting wedge blocks are located in the guide holes and slide with the guide holes, avoidance grooves are arranged on the left wedge block and the right wedge block, the lower end of the lifting wedge block is located in the avoidance groove, an inner lifting wedge surface is arranged on the inner side of the lower end of the lifting wedge block, and the side surface of the avoidance groove close to the side of the wedge surface top block is set as an outer lifting wedge surface matched with the inner lifting wedge surface. In the floating lifting mechanism of the present invention, the eccentric wheel is driven to rotate by rotating the eccentric wheel shaft, and the eccentric wheel drives the wedge-surface top block to be lifted or lowered steadily, thereby squeezing the left wedge block and the right wedge block located on both sides of the wedge-surface top block to make the left wedge block and the right wedge block move along the sliding cavity, so that the lifting wedge block is lifted or lowered under the action of the left wedge block and the right wedge block, thereby lifting or lowering the top plate (protruding from the top plate receiving groove or retracting into the top plate receiving groove). When the top plate is lifted and protrudes from the top plate receiving groove, the aquatic product package can be lifted steadily and separated from the shelf plate; the contact area between the top plate and the aquatic product package is large, and the lifting is stable. The floating lifting mechanism of the present invention has a clever structure, is easy to use, can realize the stable lifting or lowering of the top plate, and has good reliability.

[0011] Preferably, a spring cavity is provided in the shelf plate, the wedge top block passes through the spring cavity, a spring limit plate is provided on the wedge top block, a pressing spring is provided in the spring cavity, the upper end of the pressing spring is pressed against the spring limit plate, and the lower end of the pressing spring is pressed against the bottom of the spring cavity. The pressing spring ensures that the eccentric wheel can always keep in contact with the lower end of the wedge top block.

[0012] Preferably, the lower end surface of the wedge-surface top block is set as an arc-shaped surface.

[0013] Preferably, a rotating wheel handle is fixed to one end of the eccentric wheel shaft, and the rotating wheel handle is used to manually rotate the eccentric wheel shaft, which is convenient and flexible to operate.

[0014] Preferably, the forced ventilation pre-cooling warehouse for slightly freezing and preserving seafood also includes a refrigeration unit, which is arranged outside the warehouse and connected to the coil evaporator, the left fin evaporator, and the right fin evaporator.

[0015] Therefore, the present invention has the following beneficial effects: the structure of the cold storage is optimized, and the air can be pre-cooled by arranging a left pre-cooling zone, a freezing zone, a right pre-cooling zone, a cold air circulation pipe, a left fan and a right fan and other structures, and at the same time, the cold air in the freezing zone can form a forced convection circulation, thereby improving the refrigeration efficiency and refrigeration effect of the freezing zone, and making the cold air evenly distributed throughout the freezing zone, and the cold amount in the freezing zone is evenly distributed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0018] Figure 3 It is a top view of the cooperation between the shelf plate and the floating jacking mechanism.

[0019] Figure 4 yes Figure 3 Cross-sectional view along the AA direction.

[0020] Figure 5 is a top view of the shelf.

[0021] Figure 6 yes Figure 4 Enlarged view of point B in the middle.

[0022] In the figure: storage body 1, left partition 2, right partition 3, left precooling area 4, freezing area 5, right precooling area 6, cold air circulation pipe 7, connecting branch pipe 8, coil evaporator 9, left fin evaporator 10, right fin evaporator 11, left fan 12, right fan 13, left flow port 14, right flow port 15, air distribution hole plate 16, air distribution chamber 17, air distribution hole 18, left air guide duct 19, right air guide duct 20, arc guide plate 21, bracket 22, shelf Plate 23, eccentric wheel shaft 24, top plate accommodating groove 25, sliding cavity 26, left wedge block 27, right wedge block 28, left wedge surface 29, right wedge surface 30, compression spring 31, wedge surface top block 32, extrusion wedge surface 33, eccentric wheel 34, top plate 35, guide hole 36, lifting wedge block 37, avoidance groove 38, inner lifting wedge surface 39, outer lifting wedge surface 40, spring cavity 41, spring limit plate 42, tightening spring 43, rotating wheel handle 44, refrigeration unit 45. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1 , Figure 2A forced ventilation pre-cooling warehouse for slightly freezing and preserving seafood shown in the figure comprises a warehouse body 1 and a refrigeration unit 45. A left partition 2 and a right partition 3 are arranged in the warehouse body. The left partition and the right partition divide the space in the warehouse body into three areas: a left pre-cooling area 4, a freezing area 5, and a right pre-cooling area 6. An arc guide plate 21 is fixed at the bottom corner of the left pre-cooling area and the right pre-cooling area. The concave surface of the arc guide plate faces the freezing area. A cold air circulation pipe 7 is arranged on the top of the warehouse body. The two ends of the cold air circulation pipe are respectively connected to the left pre-cooling area and the right pre-cooling area. The right pre-cooling zone is connected, and a connecting branch pipe 8 connected to the freezing zone is connected to the cold air circulation pipe. A wind distribution hole plate 16 is fixed on the top of the freezing zone. The space between the wind distribution hole plate and the top plate of the warehouse body forms a wind distribution chamber 17. The connecting branch pipe is connected to the wind distribution chamber, and a wind distribution hole 18 is opened on the wind distribution hole plate; a left air guide 19 is fixed above the left pre-cooling zone, and a right air guide 20 is fixed above the right pre-cooling zone. The left air guide 20 and the right air guide 20 are both round and square. The upper outlet of the left air guide 20 is connected to the cold air circulation pipe. The lower inlet edge of the cylinder is fixedly connected to the inner wall of the left pre-cooling zone, the upper outlet of the right air guide cylinder is connected to the cold air circulation pipe, and the lower inlet edge of the right air guide cylinder is fixedly connected to the inner wall of the right pre-cooling zone; a coil evaporator 9 is arranged on the inner wall of the freezing zone, a left fin evaporator 10 and a right fin evaporator 11 are arranged in the left pre-cooling zone and the right pre-cooling chamber respectively, and a left fan 12 and a right fan 13 are installed under the left fin evaporator and the right fin evaporator respectively. The left pre-cooling zone is provided with a left partition and a right fan 13 is provided on the left partition and a right fan 13 is provided on the left partition and a left fan 13 is provided on the right pre-cooling zone. The left flow port 14 located below the left fan is connected to the freezing zone, and the right pre-cooling zone is connected to the freezing zone through the right flow port 15 arranged on the right partition and located below the right fan. The refrigeration unit is arranged outside the warehouse and is connected to the coil evaporator, the left fin evaporator, and the right fin evaporator. A shelf is placed in the freezing zone, and the shelf includes a bracket 22 and a shelf board 23 arranged on the bracket along the longitudinal interval. The shelf board is provided with a floating lifting mechanism (such as Figure 3-Figure 6As shown in the figure, the floating lifting mechanism includes an eccentric wheel shaft 24, a top plate accommodating groove 25 is arranged on the shelf plate at intervals, a sliding cavity 26 is arranged in the shelf plate below the top plate accommodating groove, a left wedge block 27 and a right wedge block 28 are arranged opposite to each other in the sliding cavity, a left wedge surface 29 and a right wedge surface 30 are arranged on the opposite surfaces of the left wedge block and the right wedge block, a compression spring 31 is arranged between the left wedge block and the sliding cavity, and between the right wedge block and the sliding cavity, and the two ends of the compression spring are respectively against the left wedge block and the sliding cavity wall, and the right wedge block and the sliding cavity wall, a wedge surface top block 32 is arranged in the shelf plate, a spring cavity 41 is arranged in the shelf plate, the wedge surface top block passes through the spring cavity, a spring limiting plate 42 is arranged on the wedge surface top block, a tightening spring 43 is arranged in the spring cavity, the upper end of the tightening spring is against the spring limiting plate, and the lower end of the tightening spring is against the bottom of the spring cavity, and the wedge The upper end of the surface top block is provided with an extrusion wedge surface 33 which is respectively matched with the left wedge surface and the right wedge surface. The eccentric wheel shaft is rotatably connected to the bracket. A rotating wheel handle 44 is fixed to one end of the eccentric wheel shaft. An eccentric wheel 34 is fixed on the eccentric wheel shaft. The eccentric wheel contacts the lower end of the wedge surface top block. The lower end surface of the wedge surface top block is set as an arc surface. A top plate 35 is provided in the top plate accommodating groove. Guide holes 36 connected with the sliding cavity are provided on both sides of the groove bottom of the top plate accommodating groove. Lifting wedge blocks 37 are fixed on both sides of the bottom surface of the top plate. The lifting wedge blocks are located in the guide holes and slidably matched with the guide holes. Avoidance grooves 38 are provided on the left wedge block and the right wedge block. The lower end of the lifting wedge block is located in the avoidance groove. An inner lifting wedge surface 39 is provided on the inner side of the lower end of the lifting wedge block. The side surface of the avoidance groove close to the side of the wedge surface top block is set as an outer lifting wedge surface 40 which is matched with the inner lifting wedge surface.

[0025] The operating principle of the present invention is as follows: placing the package containing the aquatic product on the shelf in the shelf, starting the refrigeration unit, the left fan and the right fan, and refrigerating the freezing area through the combined action of the coil evaporator, the left fin evaporator and the right fin evaporator, so that the aquatic product is pre-cooled to the set temperature and then transferred to the refrigerator for refrigeration; when the package on the shelf is to be removed, the rotary wheel handle is rotated to make the eccentric wheel lift the wedge-surface top block, and the wedge-surface top block squeezes the left wedge block and the right wedge block on both sides thereof so that the left wedge block and the right wedge block move along the sliding cavity to squeeze the corresponding lifting wedge block, so that the lifting wedge block is lifted up under the action of the left wedge block and the right wedge block, thereby pushing the top plate out of the top plate receiving groove, and the package of the aquatic product is steadily lifted up and separated from the shelf, and the package of the aquatic product can be removed at this time.

[0026] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A forced ventilation pre-cooling warehouse for slightly freezing and preserving seafood, comprising a warehouse body (1), characterized in that: A left partition (2) and a right partition (3) are provided in the storage body, and the left partition and the right partition divide the space in the storage body into three areas: a left pre-cooling area (4), a freezing area (5), and a right pre-cooling area (6). A cold air circulation pipe (7) is provided on the top of the storage body, and the two ends of the cold air circulation pipe are respectively connected to the left pre-cooling area and the right pre-cooling area. A connecting branch pipe (8) connected to the freezing area is connected to the cold air circulation pipe. A shelf is provided in the freezing area, and a coil-type evaporator is provided on the inner wall of the freezing area. (9), a left finned evaporator (10) and a right finned evaporator (11) are respectively provided in the left pre-cooling zone and the right pre-cooling chamber, and a left fan (12) and a right fan (13) are respectively provided below the left finned evaporator and the right finned evaporator. The left pre-cooling zone is connected to the freezing zone via a left flow port (14) provided on the left partition and located below the left fan, and the right pre-cooling zone is connected to the freezing zone via a right flow port (15) provided on the right partition and located below the right fan.

2. A forced ventilation pre-cooling store for slightly freezing and preserving seafood according to claim 1, characterized in that: An air distribution hole plate (16) is provided on the top of the freezing zone, and a space between the air distribution hole plate and the top plate of the storage body forms an air distribution chamber (17). The connecting branch pipe is connected to the air distribution chamber, and air distribution holes (18) are provided on the air distribution hole plate.

3. A forced ventilation pre-cooling store for slightly freezing and preserving seafood according to claim 2, characterized in that: A left air duct (19) is provided above the left pre-cooling zone, and a right air duct (20) is provided above the right pre-cooling zone. The left air duct and the right air duct are both round and square. The upper outlet of the left air duct is connected to the cold air circulation pipe, and the lower inlet edge of the left air duct is fixedly connected to the inner wall of the left pre-cooling zone. The upper outlet of the right air duct is connected to the cold air circulation pipe, and the lower inlet edge of the right air duct is fixedly connected to the inner wall of the right pre-cooling zone.

4. A forced ventilation precooling store for slightly freezing and preserving seafood according to claim 1, 2 or 3, characterized in that: The left pre-cooling zone and the right pre-cooling zone are both provided with arc-shaped guide plates (21) at the bottom corners, and the concave surfaces of the arc-shaped guide plates face the freezing zone.

5. A forced ventilation pre-cooling store for slightly freezing and preserving seafood according to claim 1, characterized in that: The shelf comprises a support (22) and a shelf plate (23) arranged on the support at intervals along the longitudinal direction, wherein the shelf plate is provided with a floating lifting mechanism capable of lifting the aquatic product package to separate from the shelf plate.

6. A forced ventilation pre-cooling store for slightly freezing and preserving seafood according to claim 5, characterized in that: The floating lifting mechanism comprises an eccentric wheel shaft (24), a top plate receiving groove (25) is provided on the shelf plate at intervals, a sliding cavity (26) is provided in the shelf plate below the top plate receiving groove, a left wedge block (27) and a right wedge block (28) are arranged opposite to each other in the sliding cavity, a left wedge surface (29) and a right wedge surface (30) are provided on the opposite surfaces of the left wedge block and the right wedge block, a compression spring (31) is provided between the left wedge block and the sliding cavity, and between the right wedge block and the sliding cavity, a wedge surface top block (32) is provided in the shelf plate, and an extrusion wedge surface (33) which is respectively matched with the left wedge surface and the right wedge surface is provided at the upper end of the wedge surface top block, and the eccentric wheel shaft is rotated and connected to the The bracket is connected to an eccentric wheel shaft and an eccentric wheel (34) is provided. The eccentric wheel contacts the lower end of the wedge surface top block. A top plate (35) is provided in the top plate receiving groove. Guide holes (36) communicating with the sliding cavity are provided on both sides of the groove bottom of the top plate receiving groove. Lifting wedge blocks (37) are fixed on both sides of the bottom surface of the top plate. The lifting wedge blocks are located in the guide holes and are slidably matched with the guide holes. Avoidance grooves (38) are provided on the left wedge block and the right wedge block. The lower end of the lifting wedge block is located in the avoidance groove. An inner lifting wedge surface (39) is provided on the inner side of the lower end of the lifting wedge block. The side surface of the avoidance groove close to the side of the wedge surface top block is provided as an outer lifting wedge surface (40) matched with the inner lifting wedge surface.

7. A forced ventilation pre-cooling store for slightly freezing and preserving seafood according to claim 6, characterized in that: A spring cavity (41) is provided in the shelf plate, the wedge surface top block passes through the spring cavity, a spring limiting plate (42) is provided on the wedge surface top block, a pressing spring (43) is provided in the spring cavity, the upper end of the pressing spring abuts against the spring limiting plate, and the lower end of the pressing spring abuts against the bottom of the spring cavity.

8. A forced ventilation precooling store for slightly freezing and preserving seafood according to claim 6, characterized in that: The lower end surface of the wedge-surface top block is set as an arc surface.

9. A forced ventilation pre-cooling store for slightly freezing and preserving seafood according to claim 6, characterized in that: A rotating wheel handle (44) is fixed to one end of the eccentric wheel shaft.

10. A forced ventilation pre-cooling store for slightly freezing and preserving seafood according to claim 1, characterized in that: The forced ventilation pre-cooling store for slightly freezing and preserving seafood further comprises a refrigeration unit (45), which is arranged outside the store and connected to the coil evaporator, the left fin evaporator, and the right fin evaporator.

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