A controlled atmosphere refrigerated container

Abstract

The utility model discloses a kind of air-conditioning refrigerated containers, it is related to refrigerated container technical field, including container body and being set on the air-conditioning window of the container body, the air-conditioning window is oppositely set on the two side walls of the container body, the air-conditioning window includes at least two layers of fresh-keeping film module and protective net, the protective net is distributed in the inside and outside of each layer fresh-keeping film module, the air layer between two adjacent layers fresh-keeping film module.The air-conditioning refrigerated container of the utility model is provided with air-conditioning window with fresh-keeping film on box body, relying on the physical preservative film of cell membrane intelligent regulation gas, oxygen, carbon dioxide concentration in box can be dynamically regulated and controlled, avoid the metabolic imbalance, ripening corruption caused by respiration of fruit and vegetable, greatly extend the preservation period, meet the long-term transport demand of high-value fruit and vegetable across region, across ocean.

Description

Technical Field

[0001] This utility model relates to the field of refrigerated container technology, and in particular to a controlled atmosphere refrigerated container. Background Technology

[0002] Controlled atmosphere (CA) refrigerated containers are crucial tools in cold chain transportation. Their working principle involves using refrigeration units to maintain a low temperature within the refrigerated compartment, replacing the air inside with high-purity nitrogen generated by the CA system, and using a humidifier to control humidity, thus extending the shelf life of fruits and vegetables. Ordinary refrigerated containers rely solely on mechanical refrigeration to maintain low temperatures and cannot regulate the oxygen-carbon dioxide ratio. Therefore, during fruit and vegetable transport, respiration continuously consumes oxygen and produces carbon dioxide and ethylene, leading to metabolic imbalance, accelerated ripening and spoilage. Furthermore, the lack of intelligent regulation results in energy waste and a short shelf life. Traditional CA refrigerated containers also rely on mechanical nitrogen generation and gas control equipment for gas regulation. This not only increases initial purchase costs but also requires frequent manual monitoring and adjustment of gas concentration, leading to high operating and maintenance costs. Mechanical failures can easily cause CA failure, and the high sealing requirements and the vulnerability of the gas balance to opening and closing doors make them unsuitable for transporting mixed product categories. As the demand for cross-regional and transoceanic transportation of high-value fruits and vegetables (such as cherries and strawberries) grows, the shortcomings of the existing two types of containers in terms of preservation effect, cost control, and scenario adaptability are becoming increasingly apparent. Therefore, the "lack of modified atmosphere and short preservation time" of ordinary refrigerated containers and the "high cost, difficult maintenance, and weak adaptability" of traditional refrigerated modified atmosphere containers are technical problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of this invention is to provide a controlled atmosphere refrigerated container to solve the problems existing in the prior art. It can dynamically control the concentration of oxygen and carbon dioxide inside the container, avoid metabolic imbalance and ripening and spoilage of fruits and vegetables caused by respiration, significantly extend the preservation period, and meet the long-term transportation needs of high-value fruits and vegetables across regions and oceans.

[0004] To achieve the above objectives, this utility model provides the following solution: This utility model provides a modified atmosphere refrigerated container, including a container body and a modified atmosphere window disposed on the container body. The modified atmosphere window is disposed opposite to each other on two side walls of the container body. The modified atmosphere window includes at least two layers of fresh-locking film modules and a protective net. The protective net is distributed on the inner and outer sides of each layer of fresh-locking film modules, and an air gap is formed between two adjacent layers of fresh-locking film modules.

[0005] In some embodiments, the controlled atmosphere window further includes a window frame, the outer periphery of which is connected to a window on the container body, and the inside of the window frame is equipped with the food-locking film module and the protective net.

[0006] In some embodiments, the freshness-locking film module includes a freshness-locking film and two PETG support plates with dense micropores. The two PETG support plates with dense micropores are disposed on the inner and outer sides of the freshness-locking film, and the edges of the PETG support plates are bonded and fixed to the edges of the freshness-locking film module by hot melt adhesive.

[0007] In some embodiments, the inner periphery of the window frame is provided with mounting grooves corresponding to the food-locking film module and the protective net, and the outer periphery of the food-locking film module and the protective net are installed in the respective mounting grooves and fixed by bolts.

[0008] In some embodiments, the connection points between the food-locking film module and the protective net and each of the mounting slots are coated with sealant.

[0009] In some embodiments, the freshness-locking film module has two layers, and protective nets are provided on the inner and outer sides of both layers of the freshness-locking film module, with an air gap between the two freshness-locking film modules.

[0010] In some embodiments, the freshness-locking film is a food-grade environmentally friendly PE film.

[0011] In some embodiments, the protective mesh is a stainless steel mesh or a titanium alloy mesh.

[0012] In some embodiments, the window frame is a stainless steel window frame or a titanium alloy window frame.

[0013] The present invention achieves the following technical advantages over the prior art: 1. Precise Modified Atmosphere + Long-lasting Preservation: The modified atmosphere window with a freshness-locking film is set on the box. It is a physical preservation film that uses a cell membrane to intelligently regulate the gas. It can dynamically control the concentration of oxygen and carbon dioxide in the box, avoid metabolic imbalance and ripening and spoilage of fruits and vegetables caused by respiration, and significantly extend the preservation period to meet the long-term transportation needs of high-value fruits and vegetables across regions and oceans.

[0014] 2. Low cost and low maintenance: It does not rely on mechanical nitrogen generation and gas control equipment, reducing the purchase investment of complex mechanical components and lowering the initial cost; at the same time, it does not require frequent manual monitoring and adjustment of gas concentration, which also reduces the risk of controlled atmosphere failure due to mechanical failure, significantly reducing operation and maintenance costs and solving the problems of high initial purchase cost and heavy labor and maintenance costs of traditional controlled atmosphere boxes.

[0015] 3. Strong adaptability to various scenarios: It is less dependent on a sealed environment than traditional controlled atmosphere containers. Opening and closing the door does not easily disrupt the gas balance. Conventional controlled atmosphere containers experience gas balance disruption after opening and closing, requiring readjustment using an instrument to restore balance. The controlled atmosphere refrigerated container of this invention features a controlled atmosphere window, enabling autonomous gas exchange. Within a short time after opening and closing, gas exchange through the preservation film allows for the autonomous achievement of dynamic gas balance. It is suitable for mixed transport of multiple product categories, allowing for dynamic gas adjustment of fruits and vegetables with different respiration rates through the preservation film. Furthermore, it can be applied to various standard transport vehicles, flexibly meeting the needs of different scenarios such as sea and land transport, overcoming the shortcomings of traditional controlled atmosphere containers which are difficult to adapt to multi-category transport and have many limitations in transport scenarios.

[0016] 4. Energy-saving and efficient: By combining the intelligent modified atmosphere function of the physical preservation film with the basic refrigeration function, no additional mechanical gas control equipment is required to consume energy. Compared with ordinary refrigerators, it reduces unnecessary energy waste and avoids the high energy consumption problem of mechanical components in traditional modified atmosphere boxes, thereby improving energy utilization efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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 these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the controlled atmosphere refrigerated container of this utility model; Figure 2 This is an exploded view of the controlled atmosphere window in this utility model; In the picture: 1. Container body; 2. Controlled atmosphere window; 3. Freshness-locking film module; 4. Protective net; 5. Window frame. Detailed Implementation

[0019] 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 protection scope of the present utility model.

[0020] The purpose of this invention is to provide a controlled atmosphere refrigerated container to solve the problems existing in the prior art.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The controlled atmosphere refrigerated container in this embodiment, such as Figures 1-2 As shown, the container includes a container body 1 and a modified atmosphere window 2 disposed on the container body 1. The modified atmosphere window 2 is disposed opposite to each other on two side walls of the container body 1. The modified atmosphere window 2 includes at least two layers of fresh-locking film modules 3 and a protective net 4. The protective net 4 is distributed on the inner and outer sides of each layer of fresh-locking film modules 3, and there is an air gap between two adjacent layers of fresh-locking film modules 3. The food-locking film can selectively allow gases such as O2, N2, and CO2 to pass through. For example, by reducing O2 penetration through its "barrier properties," the film minimizes the entry of external O2 into the packaging, inhibits microbial respiration, slows down oxidation, and prolongs the freshness of the food. In modified atmosphere packaging, the CO2 concentration is typically controlled between 5% and 30% (adjusted according to the food; lower concentrations are needed for fruits and vegetables, while higher concentrations are possible for meats). The film also allows for "moderate permeability," enabling the release of small amounts of CO2 produced by the food's respiration, preventing excessive concentrations that could lead to spoilage (as fruits and vegetables produce alcohol through anaerobic respiration). The modified atmosphere window 2, formed by the food-locking film module 3, enables intelligent bidirectional gas regulation, maintaining a stable environment within the container. By reducing or inhibiting the respiration of fruits and vegetables, they enter a dormant state. During dormancy, the consumption of nutrients decreases, and the rate of nutrient loss slows down over a certain period, preserving nutrients as much as possible. Furthermore, both the food-locking film and the air layer are poor conductors of temperature, effectively maintaining the internal temperature of the container.

[0023] In some embodiments, the controlled atmosphere window 2 further includes a window frame 5, which is a stainless steel window frame 5 or a titanium alloy window frame 5. The outer periphery of the window frame 5 is connected to the window opened on the container body 1 by bolts or welding, and the connection is sealed. The food-locking film module 3 and the protective net 4 are installed inside the window frame 5.

[0024] In some embodiments, the food-locking film module 3 includes a food-locking film and two PETG support plates with densely packed micropores. The two PETG support plates with densely packed micropores are disposed on the inner and outer sides of the food-locking film, and the edges of the PETG support plates are bonded and fixed to the edges of the food-locking film module 3 by hot melt adhesive. The PETG support plates with densely packed micropores can support the food-locking film without affecting the passage of gas.

[0025] In some embodiments, the inner periphery of the window frame 5 is provided with mounting grooves corresponding to the food-locking film module 3 and the protective net 4. The outer periphery of the food-locking film module 3 and the protective net 4 are installed in the respective mounting grooves and fixed with bolts. In order to ensure sealing, the connection between the food-locking film module 3 and the protective net 4 and each of the mounting grooves is coated with sealant.

[0026] In some embodiments, the freshness-locking film module 3 is provided with two layers, and protective nets 4 are provided on the inner and outer sides of both layers of the freshness-locking film module 3, with an air gap between the two freshness-locking film modules 3.

[0027] In some implementations, the food-grade environmentally friendly PE film is used, which combines flexibility, low-temperature resistance, and heat preservation to ensure gas exchange efficiency and stable temperature inside the box.

[0028] In some implementations, the protective net 4 is made of stainless steel or titanium alloy, which protects the food-locking film from external impacts without obstructing gas flow, forming a dual protection structure.

[0029] In some implementations, the window frame 5 is a stainless steel window frame 5 or a titanium alloy window frame 5, which can ensure the structural strength and support of the window.

[0030] In some implementations, the container body 1 features a regular or streamlined design, with a corrosion-resistant and rust-proof surface and a reinforced aluminum alloy load-bearing frame at the bottom. Its flexible dimensions allow it to adapt to various transportation modes, including sea and land transport, and seamlessly integrate with standard transport vehicles, improving logistics turnover efficiency. The reinforced load-bearing frame at the bottom of the container is made of high-strength aluminum alloy, which is lightweight yet has a strong load-bearing capacity, evenly distributing the weight of the cargo and preventing container deformation.

[0031] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A controlled atmosphere refrigerated container, characterized in that: The container includes a container body and a modified atmosphere window disposed on the container body. The modified atmosphere window is disposed opposite to each other on two side walls of the container body. The modified atmosphere window includes at least two layers of fresh-locking film modules and a protective net. The protective net is distributed on the inner and outer sides of each layer of fresh-locking film modules, and there is an air gap between two adjacent layers of fresh-locking film modules.

2. The controlled atmosphere refrigerated container according to claim 1, characterized in that: The controlled atmosphere window also includes a window frame, the outer periphery of which is connected to a window on the container body, and the inside of the window frame is equipped with the food-locking film module and a protective net.

3. The controlled atmosphere refrigerated container according to claim 2, characterized in that: The freshness-locking film module includes a freshness-locking film and two PETG support plates with dense micropores. The two PETG support plates with dense micropores are disposed on the inner and outer sides of the freshness-locking film, and the edges of the PETG support plates are bonded and fixed to the edges of the freshness-locking film module by hot melt adhesive.

4. The controlled atmosphere refrigerated container according to claim 3, characterized in that: The inner periphery of the window frame is provided with mounting grooves corresponding to the food-locking film module and the protective net. The outer periphery of the food-locking film module and the protective net are installed in the respective mounting grooves and fixed with bolts.

5. The controlled atmosphere refrigerated container according to claim 4, characterized in that: The connection points between the food-locking film module and the protective net and each of the mounting slots are coated with sealant.

6. The controlled atmosphere refrigerated container according to claim 1, characterized in that: The freshness-locking film module has two layers, and both the inner and outer sides of the two layers of the freshness-locking film module are provided with protective nets, with an air gap between the two freshness-locking film modules.

7. The controlled atmosphere refrigerated container according to claim 3, characterized in that: The freshness-locking film is a food-grade environmentally friendly PE film.

8. The controlled atmosphere refrigerated container according to claim 1, characterized in that: The protective mesh is made of stainless steel or titanium alloy.

9. The controlled atmosphere refrigerated container according to claim 2, characterized in that: The window frame is a stainless steel window frame or a titanium alloy window frame.

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