Differential pressure precooling equipment for fruits and vegetables
By using differential pressure precooling equipment, the problem of uneven air circulation inside fruit and vegetable stacks is solved through differential pressure forced precooling, achieving rapid and uniform cooling of fruits and vegetables, and improving cooling efficiency and preservation effect.
Patent Information
- Application Number
- CN202520262018.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-18
AI Technical Summary
When fruits and vegetables are stacked in a cold storage, uneven air circulation leads to uneven pre-cooling speed, especially in the inner areas of the stack, which slows down the pre-cooling process and affects the preservation effect of the fruits and vegetables.
The fruit and vegetable differential pressure precooling equipment uses a ventilation channel formed between fruit and vegetable baskets and a pressure difference created by the fan assembly and wind deflector to force cold air to circulate quickly and evenly, thus achieving differential pressure forced precooling.
It accelerates the rate at which the internal temperature of fruits and vegetables decreases, improves cooling efficiency, saves energy, preserves the moisture content of fruits and vegetables, reduces production costs, and has strong applicability.
Smart Images
Figure CN223925210U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fruit and vegetable preservation technology, and in particular to a fruit and vegetable differential pressure precooling device. Background Technology
[0002] Because fruits and vegetables are harvested at high temperatures, they need to be cooled after harvesting to preserve their freshness. Therefore, pre-cooling is the first step in the cold chain technology for fruits and vegetables. In related technologies, pre-cooling of fruits and vegetables is achieved through static placement in cold storage. Harvested or pre-packaged products are placed in a cold storage facility and left to stand until the core temperature drops to a specified value before being packaged and transported. However, cold storage space is generally limited, and fruits and vegetables are often stacked systematically within the storage area. This results in obstructed airflow and slow, uneven heat exchange around the stacked products.
[0003] By placing fans in the cold storage, air circulation between fruits and vegetables can be accelerated and the heat exchange rate can be improved. However, since the goods are generally stacked, uneven air circulation still exists, which leads to the problem that the air outlets pre-cool quickly while the internal areas of the stacks pre-cool slowly, resulting in uneven pre-cooling speed. Utility Model Content
[0004] The main purpose of this invention is to propose a fruit and vegetable differential pressure precooling device, which aims to solve the problems of uneven air circulation and poor precooling effect inside fruit and vegetable stacks.
[0005] To achieve the above objectives, this utility model proposes a fruit and vegetable differential pressure precooling device, which includes a shell and a fan assembly. The shell has an air inlet side and an air outlet side. The air inlet side is provided with an air inlet, and the air outlet side is provided with an air outlet. The air inlet extends in the vertical direction. The fan assembly is located at the air outlet. One side of the shell, located on opposite sides of the air inlet, is used to stack multiple fruit and vegetable baskets containing fruits and vegetables. When multiple fruit and vegetable baskets are stacked on opposite sides of the air inlet, an air passage is formed between the two stacks of fruit and vegetable baskets on opposite sides of the air inlet. A windproof curtain shields the upper and front sides of the two stacks of fruit and vegetable baskets, so that the outer sides of the two stacks of fruit and vegetable baskets form an air inlet end face, and the inner sides form an air outlet end face, with the air outlet end face communicating with the air inlet through the air passage.
[0006] In one embodiment, the housing includes a top cover, a middle housing, and a bottom plate, wherein the air inlet side is formed in the middle housing and the air outlet side is formed in the top cover, or the air outlet side is formed in the middle housing and is disposed on a different side from the air inlet side.
[0007] In one embodiment, the middle housing includes a front panel and a back panel disposed opposite to each other, and two side panels disposed opposite to each other. The front panel, the back panel, and the two side panels are connected to form the middle housing. The air inlet is disposed on the front panel, and the air outlet is disposed on the top cover.
[0008] In one embodiment, the air outlets are provided in multiple ways, and the multiple air outlets are arranged at intervals along the length of the top cover. The fan assembly includes multiple fans, and the multiple fans are arranged one-to-one at the multiple air outlets.
[0009] In one embodiment, the width of the front panel is D1 and the width of the air inlet is D2, satisfying 6≥D1 / D2≥3.
[0010] In one embodiment, the height of the front panel is H1, and the height of the air inlet is H2, satisfying 2≥H1 / H2≥1.
[0011] In one embodiment, the length of the housing ranges from 130cm to 200cm, and / or the width of the housing ranges from 25cm to 50cm, and / or the height of the housing ranges from 120cm to 200cm.
[0012] In one embodiment, the housing is configured in the shape of a cuboid.
[0013] In one embodiment, the fruit and vegetable differential pressure precooling equipment further includes a mounting frame with a sliding groove for mounting the housing.
[0014] In one embodiment, the fruit and vegetable differential pressure precooling device further includes a support portion, which is disposed at the bottom of the mounting frame and is used to support the mounting frame.
[0015] In one embodiment, the support is configured as a pulley.
[0016] In one embodiment, the fruit and vegetable differential pressure precooling device further includes a baffle plate, which is disposed at the bottom of the housing and on the same side as the air inlet, and is used to shield the support portion.
[0017] This utility model discloses a differential pressure precooling device for fruits and vegetables, comprising a shell and a fan assembly. The shell has an air inlet side and an air outlet side, with an air inlet on the air inlet side and an air outlet on the air outlet side. The air inlet extends vertically. The fan assembly is located at the air outlet. By employing a differential pressure forced precooling method, through the air passage formed between multiple stacked fruit and vegetable baskets on opposite sides of the air inlet, and the fan assembly at the air outlet, and by using a baffle curtain to block the upper and front sides of the two stacks of fruit and vegetable baskets, a pressure difference is forced between the inner and outer sides of the stacked fruit and vegetable baskets, forming a differential pressure air passage. This allows the air inside the fruit and vegetable baskets (i.e., the air passage) to flow out rapidly (flowing in through the air inlet and out through the air outlet under the action of the fan assembly), while external air quickly enters, accelerating the air circulation between the inner and outer sides of the fruit and vegetable baskets. The air can pass through the fruit and vegetable products quickly and evenly, achieving the purpose of rapidly reducing the internal temperature of the fruit and vegetable products, thus solving the problem of uneven air circulation inside the stacked fruit and vegetable products. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0019] Figure 1 A schematic diagram of an embodiment of the fruit and vegetable differential pressure precooling device provided by this utility model;
[0020] Figure 2 for Figure 1 Front view of a differential pressure precooling equipment for fruits and vegetables;
[0021] Figure 3 for Figure 1 Exploded view of a pressure differential precooling equipment for fruits and vegetables;
[0022] Figure 4 A partial enlarged view of the fruit and vegetable differential pressure precooling device provided by this utility model;
[0023] Figure 5 A schematic diagram of the structure of the fruit and vegetable differential pressure precooling device provided by this utility model, used in conjunction with a fruit and vegetable basket;
[0024] Figure 6 for Figure 5 A structural diagram from another perspective of the central structure;
[0025] Figure 7 A schematic diagram of the structure of the fruit and vegetable differential pressure precooling equipment provided by this utility model, used in conjunction with fruit and vegetable baskets and windbreak curtains.
[0026] Explanation of icon numbers:
[0027] 10. Fruit and vegetable differential pressure precooling equipment; 100. Shell; 100a. Air inlet; 100b. Air outlet; 110. Top cover; 120. Middle shell; 121. Front panel; 122. Back panel; 123. Side panel; 130. Bottom plate; 200. Fan assembly; 210. Fan; 300. Mounting bracket; 310. Slide rail; 400. Pulley; 500. Baffle plate;
[0028] 20. Placement position; 30. Fruit and vegetable basket; 31. Top side; 32. Front side; 33. Outer side; 34. Inner side; 40. Air passage; 50. Windproof curtain.
[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0033] Because fruits and vegetables are harvested at high temperatures, they need to be cooled after harvesting to preserve their freshness. Therefore, pre-cooling is the first step in the cold chain technology for fruits and vegetables. In related technologies, pre-cooling of fruits and vegetables is achieved through static placement in cold storage. Harvested or pre-packaged products are placed in a cold storage facility and left to stand until the core temperature drops to a specified value before being packaged and transported. However, cold storage space is generally limited, and fruits and vegetables are often stacked systematically within the storage area. This results in obstructed airflow and slow, uneven heat exchange around the stacked products.
[0034] While placing fans in cold storage can accelerate airflow between fruits and vegetables and improve heat exchange rates, uneven airflow still exists because goods are typically stacked. This results in faster pre-cooling at the vents and slower pre-cooling within the stacked areas, leading to uneven pre-cooling speeds. This invention proposes a differential pressure pre-cooling device for fruits and vegetables, designed for placement in cold storage, to solve the problem of uneven airflow within stacked fruits and vegetables.
[0035] Please see Figure 1 , Figures 5 to 7 In one embodiment of this utility model, the fruit and vegetable differential pressure precooling device 10 includes a housing 100 and a fan assembly 200. The housing 100 has an air inlet side and an air outlet side. The air inlet side is provided with an air inlet 100a, and the air outlet side is provided with an air outlet 100b. The air inlet (110a) extends in the vertical direction. The fan assembly 200 is disposed at the air outlet 100b. A portion of the housing 100, located on one side opposite to the air inlet 100a, is used to stack multiple fruit and vegetable baskets 30 containing fruits and vegetables. The stacking position of the fruit and vegetable baskets 30 can be found in [reference needed]. Figure 1 In the placement position 20, when multiple fruit and vegetable baskets 30 are stacked on opposite sides of the air inlet 100a, an air passage 40 is formed between the two piles of fruit and vegetable baskets 30 on opposite sides of the air inlet 100a. The upper side 31 and front side 32 of the two piles of fruit and vegetable baskets 30 are blocked by the windproof curtain 50, so that the outer side 33 of the two piles of fruit and vegetable baskets 30 forms the air inlet end face, and the inner side 34 forms the air outlet end face, and the air outlet end face is connected to the air inlet 100a through the air passage 40.
[0036] Specifically, the housing 100 can be constructed using an aluminum profile frame with baffles, or directly assembled using sheet metal. Except for the air inlet 100a and air outlet 100b, the rest of the housing 100 surface needs to be sealed. The fan assembly 200 is installed at the air outlet 100b, and the appropriate fan 210 specifications and quantity can be selected according to requirements. Furthermore, the housing 100 has an air inlet side and an air outlet side, and the housing 100 interior has an air supply duct connecting the air inlet 100a and the air outlet 110b. The air inlet side has an air inlet 100a, and the air outlet side has an air outlet 100b. The fan assembly 200 is installed at the air outlet 100b to draw external ambient air into the housing 100 through the air inlet 100a and then discharge it through the air supply duct from the air outlet 100b. The shell 100 can be made of metal, such as cold-rolled steel plate (SPCC), stainless steel (SS) or aluminum alloy, or it can be made of non-metallic material, such as PP, polycarbonate (PC), ABS plastic, polyvinyl chloride (PVC), etc., without specific limitation.
[0037] Please see Figure 1 , Figure 6 and Figure 7 ,in, Figure 6 The large arrows indicate the airflow direction when the fruit and vegetable differential pressure precooling equipment 10 is operating. The air inlet 100a is located on the air intake side and extends vertically. This arrangement allows multiple stacked fruit and vegetable baskets 30 to be placed on either side of the air inlet 100a, located on the outer side of the housing 100. These baskets 30 are used to hold fruits and vegetables that require precooling after harvesting and before transportation, such as strawberries, apples, cherries, or other vegetables. Typically, the baskets 30 are stacked to make efficient use of the space within the cold storage. When multiple fruit and vegetable baskets 30 are stacked on opposite sides of the air inlet 100a, an air passage 40 is formed between the two piles of fruit and vegetable baskets 30 on opposite sides of the air inlet 100a. The upper side 31 and front side 32 of the two piles of fruit and vegetable baskets 30 are blocked by the windproof curtain 50, so that the outer side 33 of the two piles of fruit and vegetable baskets 30 forms the air inlet end face, and the inner side 34 forms the air outlet end face. The air outlet end face is connected to the air inlet 100a through the air passage 40.
[0038] When not in use, the windbreak curtain 50 can be rolled up or folded and placed on top of or inside the fruit and vegetable differential pressure precooling equipment 10. During operation, the windbreak curtain 50 is pulled out to cover the upper sides 31 and front sides 32 of the two piles of fruit and vegetable baskets 30. The width of the windbreak curtain 50 is greater than the width of the air passage 40, and its length is greater than the sum of the length of the air passage 40 and the height of the multiple fruit and vegetable baskets 30. The windbreak curtain 50 is made of environmentally friendly and easy-to-store material.
[0039] It should be noted that when the fruit and vegetable differential pressure precooling device 10 is in use, it has mutually perpendicular vertical, horizontal, and front-back directions. The air inlet 100a is located on the housing 100, with its opening facing the front of the device. Fruit and vegetable baskets 30 are stacked on the front of the device, located on opposite sides of the air inlet 100a. The outer side 33 of the fruit and vegetable basket 30 refers to the side of the fruit and vegetable basket 30 furthest from the air inlet 100a in the horizontal direction. The inner side 34 of the fruit and vegetable basket 30 refers to the side opposite to the outer side 33 and closer to the air inlet 100a.
[0040] This application employs a differential pressure forced precooling method. Through the air passage 40 formed between multiple stacked fruit and vegetable baskets 30 on opposite sides of the air inlet 100a, and the fan assembly 200 at the air outlet 100b, and with the upper side 31 and front side 32 of the two stacks of fruit and vegetable baskets 30 blocked by the wind curtain 50, a pressure difference is forced between the inner side 34 and outer side 33 of the stacked fruit and vegetable baskets 30, forming a differential pressure air duct. This allows air inside the fruit and vegetable baskets 30 (i.e., the air passage duct) to flow out rapidly (flowing in through the air inlet 100a and being discharged through the air outlet 100b under the action of the fan assembly 200), while external air rapidly enters, accelerating the air circulation between the inner side 34 and outer side 33 of the fruit and vegetable baskets 30. Furthermore, the air can pass through the fruit and vegetable products quickly and evenly, achieving the goal of rapidly reducing the internal temperature of the fruit and vegetable products. This solves the problems of uneven airflow and poor precooling effect inside the fruit and vegetable stacks.
[0041] More specifically, pressure difference refers to the pressure difference between two adjacent points. In the pressure difference precooling process of a cold storage facility for fruits and vegetables, a pressure difference is created on both sides of the fruit and vegetable baskets 30 using a fan assembly 200. This pressure difference forces cold air to flow from the high-pressure area to the low-pressure area; that is, cold air travels from one side (outer side) of the stacked fruit and vegetable baskets 30 through the baskets to the other side (inner side). When the cold air flows over the fruits and vegetables, it exchanges heat with the product surface. Due to its lower temperature, the cold air absorbs heat from the surface of the fruits and vegetables, thus lowering the product temperature. This heat exchange process is more efficient under the influence of pressure difference because the cold air is forced to flow over the product surface at a higher velocity, thereby accelerating the heat exchange rate. Taking strawberries as an example in a cooling experiment, with the cold storage temperature set at 5-7℃, the measured data are as follows:
[0042] Table 1. Strawberry core temperature data at different times.
[0043] Serial Number Time / min Test group temperature / ℃ Control group temperature / ℃ Ambient temperature / °C 1 0 9.4 8.6 8 2 5 8.8 9.5 7.8 3 10 15 10.2 7.1 4 15 14 15 6.9 5 20 13.1 14.5 6.5 6 25 11.8 14 6.1 7 30 10.6 13.5 5.9 8 35 9.6 13.1 5.8 9 40 8.8 12.7 5.8 10 50 7.5 12 5.5 11 60 6.5 11.2 5.1 12 70 6 10.8 5
[0044] In the table above, the temperature of the experimental group refers to the temperature of the strawberry core after packaging and being placed in a cold storage and pre-cooled using the fruit and vegetable pressure differential pre-cooling device 10, while the temperature of the control group refers to the temperature of the strawberry core that was placed directly in the cold storage without using the fruit and vegetable pressure differential pre-cooling device 10.
[0045] It should be noted that within 0-15 minutes, since the temperature of the strawberry core is being tested, and the pre-cooling of strawberries is done gradually from the outside of the strawberry to the inside of the core, the 15th minute can be considered as the start of cooling the core temperature of the control group strawberries, and the 10th minute can be considered as the start of cooling the core temperature of the experimental group strawberries.
[0046] According to the test data in the table, the strawberry core temperature in the control group only dropped from 15℃ to 10.8℃ after 55 minutes (from the 15th to the 70th minute); meanwhile, the strawberry core temperature in the experimental group dropped from 14℃ to 6℃ after 55 minutes (from the 15th to the 70th minute), remaining basically consistent with the ambient temperature. This demonstrates that using the fruit and vegetable pressure differential precooling device significantly improved the cooling efficiency of the strawberry core.
[0047] In summary, this application uses pressure differential forced precooling to precool the fruits and vegetables in the stacked fruit and vegetable baskets 30, which has the following advantages: (1) High cooling efficiency: Due to the pressure difference, cold air can be forced to flow over the surface of fruits and vegetables at a higher speed, and the cold air circulation is more uniform, thereby accelerating the heat exchange rate and improving the cooling efficiency; (2) Short cooling time: Compared with the traditional precooling method, pressure differential precooling can lower the temperature of fruits and vegetables faster; (3) Energy saving: By optimizing the cooling effect, pressure differential precooling can reduce energy consumption while ensuring cooling efficiency; (4) Strong applicability: Fruits and vegetables lose less water, which can ensure the moisture content of fruits and vegetables; (5) Low cost: A simple frame shell 100 and a fan assembly 200 are used, combined with the windproof curtain 50, to form a pressure difference to quickly precool fruits and vegetables, which is convenient to use and has low production cost.
[0048] The fruit and vegetable differential pressure precooling device 10 of this utility model includes a housing 100 and a fan assembly 200. The housing 100 has an air inlet side and an air outlet side. The air inlet side is provided with an air inlet 100a and the air outlet side is provided with an air outlet 100b. The air inlet 100a extends in the vertical direction. The fan assembly 200 is located at the air outlet 100b. By employing differential pressure forced precooling, specifically through the air passage 40 formed between multiple fruit and vegetable baskets 30 stacked on opposite sides of the air inlet 100a, and the fan assembly 200 at the air outlet 100b, and by using a windproof curtain 50 to block the upper side 31 and front side 32 of the two stacks of fruit and vegetable baskets 30, a pressure difference is forced between the inner side 34 and outer side 33 of the stacked fruit and vegetable baskets 30, forming a differential pressure air passage. This allows the air inside the fruit and vegetable baskets 30 (i.e., the air passage) to flow out rapidly (flowing in through the air inlet 100a and being discharged through the air outlet 100b under the action of the fan assembly 200), while external air quickly enters, accelerating the air circulation between the inner side 34 and outer side 33 of the fruit and vegetable baskets 30. Furthermore, the air can pass through the fruit and vegetable products quickly and evenly, achieving the purpose of rapidly reducing the internal temperature of the fruit and vegetable products, thus solving the problem of uneven air circulation inside the fruit and vegetable stacks.
[0049] Please see Figure 3 In one embodiment, the housing 100 includes a top cover 110, a middle housing 120, and a bottom plate 130. The air inlet side is formed in the middle housing 120, and the air outlet side is formed in the top cover 110. Alternatively, the air outlet side is formed in the middle housing 120 and is not on the same side as the air inlet side. Further, the housing 100 is rectangular in shape.
[0050] Specifically, the top cover 110, the middle shell 120 and the bottom plate 130 are enclosed and the enclosed shape is a cuboid. The shell 100 has a relatively regular shape, which makes it convenient for the fruit and vegetable differential pressure precooling equipment 10 to be placed against the wall when used in the cold storage, making reasonable use of the space in the cold storage; at the same time, it also facilitates the handling and transportation of the fruit and vegetable differential pressure precooling equipment.
[0051] In this embodiment, the air inlet side is formed on the middle housing 120, and the air outlet side can be formed on the top cover 110, or it can be formed on the middle housing 120 but not on the same side as the air inlet side. Furthermore, the middle housing 120 includes a front panel 121 and a back panel 122 disposed opposite to each other, and two side panels 123 disposed opposite to each other. The front panel 121, the back panel 122, and the two side panels 123 are connected to form the middle housing 120. The front panel 121 serves as the air inlet side of the housing 100, and an air inlet 100a is formed on the front panel 121. The top cover 110, the back panel 122, and the two oppositely arranged side panels 123 can all serve as the air outlet side of the housing 100. That is, the air outlet 100b is opened on the top cover 110, the back panel 122, or the two oppositely arranged side panels 123. The air outlet 100b can be opened on the top cover 110, the back panel 122, or the two oppositely arranged side panels 123 at the same time, or it can be opened on at least one of the top cover 110, the back panel 122, or the two oppositely arranged side panels 123. The position of the air outlet 100b can be adaptively adjusted according to the specific usage scenario and placement of the fruit and vegetable pressure differential precooling equipment 10, and there is no specific limitation on this.
[0052] Preferably, the air inlet 100a is located on the front panel 121, and the air outlet 100b is located on the top cover 110. This arrangement, with the air inlet 100a on the front panel 121, facilitates the stacking of fruit and vegetable baskets 30 on both sides of the air outlet 100b, forming an air passage 40 to achieve differential pressure cooling of the fruit and vegetable products. Simultaneously, the air outlet 100b being located on the top cover 110 ensures that the airflow direction of the fruit and vegetable differential pressure precooling device 10 is upward, allowing the device to be placed against a wall without occupying space within the cold storage, thus maximizing the use of space.
[0053] Furthermore, the air inlet 100a can be located in the middle of the front panel 121, which can ensure that there is enough space on both sides of the air inlet 100a to place multiple stacked fruit and vegetable baskets (30). Of course, in other embodiments, the air inlet 100a can also be located on the front panel 121 at a position biased towards its two sides, without specific limitation.
[0054] Please see Figure 1 and Figure 3In one embodiment, multiple air outlets 100b are provided, and the multiple air outlets 100b are arranged at intervals along the length direction of the top cover 110. The fan assembly 200 includes multiple fans 210, and the multiple fans 210 are correspondingly arranged at the multiple air outlets 100b. Specifically, by setting the number of air outlets 100b to multiple, the number of corresponding fans 210 is also set to multiple. Under the condition that other conditions remain unchanged, the arrangement of multiple fans 210 can increase the air flow rate in the cold storage, thereby improving the pre-cooling speed. This is because more fans 210 can provide a stronger suction effect, so that cold air can exchange heat with the surface of the fruit and vegetable products more quickly through the packaging container. The multiple air outlets 100b are arranged at intervals along the length direction of the top cover 110 and are evenly distributed on the top cover 110 so that the fans 210 arranged at the air outlets 100b can provide a uniform suction effect to achieve the pre-cooling of fruit and vegetable products.
[0055] Please see Figure 2 In one embodiment, the width of the front panel 121 is D1, and the width of the air inlet 100a is D2, satisfying 6 ≥ D1 / D2 ≥ 3. Specifically, if the width of the air inlet 100a is too large, although it can increase the amount of cold air entering, it may also lead to increased energy consumption, problems with pre-cooling uniformity and efficiency, and an excessively wide air inlet 100a may affect the pre-cooling effect on fruits and vegetables. Conversely, if the width of the air inlet 100a is too small, it will restrict the amount of cold air entering, resulting in a slower pre-cooling speed, which may prolong the pre-cooling time, increase production costs, and potentially affect the quality of fruits and vegetables. Therefore, to improve pre-cooling uniformity, it is necessary to rationally determine the width and layout of the air inlet 100a to ensure that the cold air can uniformly and fully exchange heat with the fruits and vegetables. Therefore, the width of the front panel 121 is D1, and the width of the air inlet 100a is D2, satisfying 6 ≥ D1 / D2 ≥ 3. The ratio between the width D1 of the front panel 121 and the width D2 of the air inlet 100a can be, for example, 3, 3.5, 4, 4.5, 5, 5.5 or 6, or of course, other ratios within the range, without any specific limitation.
[0056] Please see Figure 2In one embodiment, the height of the front panel 121 is H1, and the height of the air inlet 100a is H2, satisfying 2≥H1 / H2≥1. Specifically, since multiple fruit and vegetable baskets 30 are stacked on the front side of the housing 100 and located on opposite sides of the air inlet 100a, and the multiple stacked fruit and vegetable baskets 30 have a certain height, in order to ensure the uniformity of pre-cooling of fruit and vegetable products, the height of the air inlet 100a needs to be limited to a suitable range. In this embodiment, the height of the front panel 121 is H1, and the height of the air inlet 100a is H2, satisfying 2≥H1 / H2≥1. In this way, it can be ensured that cold air can pass evenly through the gaps between the multiple layers of fruit and vegetable baskets 30, thereby improving the pre-cooling efficiency and pre-cooling uniformity of fruit and vegetable products. The ratio of the height H1 of the front panel 121 to the height H2 of the air inlet 100a can, for example, be 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, or 2. Of course, it can also be a ratio within other ranges, and there is no specific limitation on this.
[0057] Please continue reading. Figure 2 In one embodiment, the length of the housing 100 ranges from 130cm to 200cm, and / or the width of the housing 100 ranges from 25cm to 50cm, and / or the height of the housing 100 ranges from 120cm to 200cm. Limiting the size of the housing 100 within the above ranges ensures the pre-cooling effect of differential pressure cooling for fruits and vegetables, facilitates production and transportation, and the overall size of the fruit and vegetable differential pressure cooling equipment 10 is suitable and does not occupy much space. The length of the housing 100 can be, for example, 130cm, 135cm, 140cm, 145cm, 150cm, 155cm, 160cm, 165cm, 170cm, 175cm, 180cm, 185cm, 190cm, 195cm, or 200cm; the width of the housing 100 can be, for example, 25cm, 30cm, 35cm, 40cm, 45cm, or 50cm; and the height of the housing 100 can be, for example, 120cm, 130cm, 140cm, 150cm, 160cm, 170cm, 180cm, 190cm, or 200cm.
[0058] Please see Figure 3 and Figure 4In one embodiment, the fruit and vegetable differential pressure precooling device 10 further includes a mounting frame 300, which is provided with a sliding groove 310 for mounting the housing 100. Specifically, the housing 100 can be installed by slidingly engaging with the mounting frame 300, eliminating the hassle of welding or bolting, making installation simple and quick. Furthermore, the mounting frame 300 is constructed as a three-dimensional frame structure, and the housing 100 is composed of multiple plate-shaped housings 100, which are sequentially slidably engaged with the mounting frame 300.
[0059] Please see Figure 1 and Figure 3 In one embodiment, the fruit and vegetable differential pressure precooling device 10 further includes a support portion 400, which is disposed at the bottom of the mounting frame 300 and serves to support the mounting frame 300. Preferably, the support portion 400 is configured as a pulley 400. The pulley 400 is connected to the mounting frame 300 and is disposed at the bottom of the mounting frame 300. The pulley 400 facilitates the movement of the fruit and vegetable differential pressure precooling device 10. There are four pulleys 400, which are respectively disposed at the four corners of the bottom of the mounting frame 300. Further, the fruit and vegetable differential pressure precooling device 10 also includes a baffle plate 500, which is disposed at the bottom of the housing 100 and on the same side as the air inlet 100a. The baffle plate 500 is used to shield the support portion 400. Since the support part 400 will raise the fruit and vegetable differential pressure precooling equipment 10, a baffle 500 should also be installed below the side of the fruit and vegetable differential pressure precooling equipment 10 where the air inlet 100a is opened, i.e. at the position where the support part 400 is raised, to cover the ground and prevent air leakage.
[0060] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A fruit and vegetable differential pressure precooling device, characterized in that, include: The housing has an air inlet side and an air outlet side, wherein the air inlet side is provided with an air inlet and the air outlet side is provided with an air outlet, and the air inlet extends in the vertical direction; as well as A fan assembly is located at the air outlet; One side of the housing, located on opposite sides of the air inlet, is used to stack multiple fruit and vegetable baskets. When multiple fruit and vegetable baskets are stacked on opposite sides of the air inlet, an air passage is formed between the two stacks of fruit and vegetable baskets on opposite sides of the air inlet. The upper and front sides of the two stacks of fruit and vegetable baskets are blocked by a windproof curtain, so that the outer side of the two stacks of fruit and vegetable baskets forms an air inlet end face, and the inner side forms an air outlet end face, and the air outlet end face is connected to the air inlet through the air passage.
2. The fruit and vegetable differential pressure precooling equipment as described in claim 1, characterized in that, The housing includes a top cover, a middle housing, and a bottom plate. The air inlet side is formed in the middle housing, and the air outlet side is formed in the top cover. Alternatively, the air outlet side is formed in the middle housing and is not on the same side as the air inlet side.
3. The fruit and vegetable differential pressure precooling equipment as described in claim 2, characterized in that, The middle housing includes a front panel and a back panel arranged opposite to each other, and two side panels arranged opposite to each other. The front panel, the back panel and the two side panels are connected to form the middle housing. The air inlet is provided on the front panel and the air outlet is provided on the top cover.
4. The fruit and vegetable differential pressure precooling equipment as described in claim 3, characterized in that, The air outlet is provided in multiple ways, and the multiple air outlets are arranged at intervals along the length of the top cover. The fan assembly includes multiple fans, and the multiple fans are arranged one-to-one at the multiple air outlets.
5. The fruit and vegetable differential pressure precooling equipment as described in claim 2, characterized in that, The width of the front panel is D1, and the width of the air inlet is D2, satisfying 6≥D1 / D2≥3.
6. The fruit and vegetable differential pressure precooling equipment as described in claim 2, characterized in that, The height of the front panel is H1, and the height of the air inlet is H2, satisfying 2≥H1 / H2≥1.
7. The fruit and vegetable differential pressure precooling equipment as described in claim 6, characterized in that, The length of the housing ranges from 130cm to 200cm, and / or the width of the housing ranges from 25cm to 50cm, and / or the height of the housing ranges from 120cm to 200cm.
8. The fruit and vegetable differential pressure precooling equipment as described in claims 1 to 7, characterized in that, The shell is rectangular in shape.
9. The fruit and vegetable differential pressure precooling equipment as described in claims 1 to 7, characterized in that, The fruit and vegetable differential pressure precooling equipment also includes a mounting frame, which is provided with a sliding groove for mounting the housing.
10. The fruit and vegetable differential pressure precooling equipment as described in claim 9, characterized in that, The fruit and vegetable differential pressure precooling equipment also includes a support part, which is located at the bottom of the mounting frame and is used to support the mounting frame.
11. The fruit and vegetable differential pressure precooling equipment as described in claim 10, characterized in that, The support is configured as a pulley.
12. The fruit and vegetable differential pressure precooling equipment as described in claim 10, characterized in that, The fruit and vegetable differential pressure precooling equipment also includes a baffle plate, which is located at the bottom of the housing and on the same side as the air inlet. The baffle plate is used to shield the support part.