Refrigerated container

Abstract

The invention discloses a refrigerated container. A plurality of channels with openings in the upper sides are formed in the box bottom; the refrigerator comprises a fan and an air outlet; the air outlet is connected with one end of each channel; the air valve comprises an air blocking piece, a rotating shaft and an elastic piece. The rotating shaft is vertically fixed in the channel; the wind shielding piece is rotatably connected with the rotating shaft; the elastic piece is fixedly connected with the rotating shaft and the windshield piece; when air is supplied into the channel, the air blocking piece rotates when the combined torque of the two sides of the rotating shaft exceeds the torque of the elastic piece, and the passing area of the channel is reduced. The multiple channels are provided with air valves, and the box body is divided into multiple air supply areas in the transverse direction. The elastic coefficients of the elastic pieces of the air valves are sequentially reduced from one end of the channel; index parameter detection units are arranged in the air supply areas respectively; the controller is provided with an index parameter threshold value, the air supply areas correspond to different fan rotating speeds, the controller is configured to obtain index parameters, and when the index parameters exceed the index parameter threshold value, the fan is controlled according to the located air supply areas. According to the invention, the uniformity of index parameters is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerated transportation, and in particular to a refrigerated container. Background Art

[0002] Currently, a large number of refrigerated containers are deployed in ocean shipping each year around the world. Improving ocean shipping safety and ensuring the quality of cargo transport have become issues of widespread concern worldwide. Building energy-efficient, high-quality ocean refrigerated containers is also a goal pursued by many refrigerated container manufacturers.

[0003] Due to the long transportation times and large geographical spans of ocean refrigerated containers, as well as the dramatic changes in the sensible and latent heat loads on the refrigeration system caused by changes in ambient temperature, relative humidity, solar radiation intensity, and the cargo being transported, ocean refrigeration units are required to be able to dynamically adjust their cooling output in response to the heat load.

[0004] With the development of marine refrigeration technology, its ability to adjust cooling output capacity as heat load changes has gradually increased. However, the open channels at the bottom of the container and the fixed horizontal air outlet method make the air volume distribution inside the box greatly affected by the placement of the cargo, resulting in poor temperature uniformity and gas concentration uniformity inside the container.

[0005] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0006] In response to the problem raised in the background technology that the temperature uniformity and gas concentration uniformity are greatly affected by the stacking of goods due to the open channels and horizontal air outlet mode at the bottom of the box, the present invention proposes a refrigerated container, in which an air valve is arranged in the open channel, and the air valve is automatically adjusted to the degree of closing by controlling the wind speed, thereby realizing the control of the air outlet volume in the air supply area in front of the air valve, improving the uniformity of the index parameters in the box, and improving the quality of the transported goods.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: A refrigerated container includes a container body, a refrigeration machine, multiple air valves, multiple index parameter detection units, and a controller; A box body, comprising a box bottom; a plurality of parallel slots with upper openings formed on the box bottom; the plurality of slots forming a plurality of air supply areas arranged at least along the extending direction of the slots; a cold machine, comprising a fan and an air outlet; the fan being arranged inside the air outlet; the air outlet being connected to one end of each of the slots; a plurality of index parameter detection units; at least one index parameter detection unit being provided in each of the plurality of air supply areas for detecting index parameters; a plurality of air valves being provided in each of the plurality of slots and between the plurality of air supply areas arranged along the extending direction of the slots; The air valve includes a windshield, a rotating shaft, and an elastic member; the rotating shaft is vertically fixedly installed in the channel; the windshield is rotatably connected to the rotating shaft; the elastic member is a torsion type, and is fixedly connected to the rotating shaft and the windshield, respectively; when air is supplied into the channel and the combined torque of the windshield on both sides of the rotating shaft is greater than the torque of the elastic member, the windshield rotates, and the passage area of ​​the channel is reduced; The elastic coefficients of the elastic members of the air valves distributed in sequence along the channel from one end of the channel close to the air outlet are reduced in sequence; The refrigerated container also includes a controller, which is respectively connected to the multiple index parameter detection units and the fan. The controller is configured with fan speeds that decrease in sequence corresponding to the multiple air supply areas arranged along the extension direction of the groove near the air outlet. The controller is used to cyclically obtain the index parameters and compare them with the index parameter threshold. When at least one index parameter is greater than the index parameter threshold, the controller adjusts the fan speed to the fan speed corresponding to the air supply area corresponding to the index parameter greater than the index parameter threshold.

[0008] The refrigerated container of the present invention divides the interior space of the container into multiple air supply areas in the transverse direction by means of air valves disposed within the channel. The elastic coefficients of the elastic members of the air valves distributed along the channel starting from one end of the channel are arranged from high to low. The air supply area requiring increased air supply volume is determined based on a comparison between an index parameter and an index parameter threshold, and the fan is controlled to operate at the corresponding fan speed. When the air supply area where the air supply volume needs to be increased is close to the air outlet, the fan is controlled to operate at a higher fan speed; at this time, the higher wind speed enables the wind shield of the air valve to overcome the torque of the elastic part with a larger elastic coefficient compared to the combined torque on both sides of the rotating shaft, and causes the air valve with a higher elastic coefficient close to the air outlet to close more, the passage area of ​​the slot here is reduced, and the air supply resistance is increased, thereby increasing the upper air outlet volume of the air supply area in front of it; When the air supply area requiring increased air supply is located in the middle region of the channel, the fan is controlled to operate at a medium fan speed; at this time, the medium air speed enables the combined torque of the air valve wind blocking piece and the two sides of the rotating shaft to overcome the torque of the elastic member with a medium elastic coefficient, so that the air valve with a large elastic coefficient near the air outlet is closed less or not closed, the air valve with a medium elastic coefficient in the middle is closed more, the passage area of the middle channel is reduced, the air supply passage resistance is increased, and the air supply area on the front side of the middle air valve is increased; When the air supply area requiring increased air supply is located near the end of the channel, the fan is controlled to operate at the lowest fan speed; at this time, the low air speed in the channel enables the combined torque of the air valve wind blocking piece and the two sides of the rotating shaft to fail to overcome the torque of any elastic member, all air valves are opened, and all have a large passage area, so that the air supply reaches the end of the channel and is discharged from the upper opening, increasing the air supply area at the end of the channel; the purpose of weakening the high index parameters of the air supply area is achieved, the uniformity of the index parameters in the refrigerated container is improved, and the quality of the transported goods is improved.

[0009] In some specific embodiments, the elastic member is a spiral spring, one end of which is fixedly connected with the rotating shaft, and the other end is fixedly connected with the wind blocking piece; when there is no wind in the channel, the elastic member is in the original state; the communication area of the channel is maximum; when the wind blocking piece rotates in the channel, the elastic member deforms, and the passage area of the channel becomes smaller.

[0010] The refrigerated container of the embodiment uses a spiral spring with a long rotating stroke to extend the rotating stroke and stability of the air valve, thereby expanding the air speed range for controlling the rotation of the air valve, adapting to the demand for air supply at different speeds in the refrigerated container, and improving the accuracy of air speed control.

[0011] In some specific embodiments, the elastic member is a cylindrical spiral spring, the inner diameter of which is adapted to the rotating shaft and is sleeved on the rotating shaft.

[0012] The refrigerated container of the embodiment uses a cylindrical spiral spring and sleeves it on the rotating shaft, thereby improving the stability and reliability of the deformable elastic member, and further improving the stability and reliability of the air valve, and improving the service life of the air valve.

[0013] In some specific embodiments, the controller is configured to, when at least one of the index parameters exceeds the index parameter threshold value, obtain the highest index parameter of each index parameter that exceeds the index parameter threshold value; and control the fan to operate at the fan speed corresponding to the air supply area where the highest index parameter is located.

[0014] The refrigerated container of this embodiment is configured with different air supply areas corresponding to different fan speeds, and the fan speed is controlled to operate at the fan speed corresponding to the air supply area with the highest index parameter value exceeding the index parameter threshold. This first solves the problem of increasing the air supply volume in the air supply area with the highest index parameter, thereby improving the targeted air supply. In some specific embodiments, an air guide device is further included, which is disposed between the fan and the end of each of the slots closest to the fan, so that each of the air supply areas forms multiple air volume areas in the longitudinal direction. At least one index parameter detection unit is respectively provided in each of the air volume areas; The air guide device is connected to the controller; the controller is configured to cyclically obtain the index parameters and control the air guide device according to each index parameter to change the proportion of the air supply volume of each air volume area in the longitudinal direction.

[0015] The refrigerated container of this embodiment is provided with an air guide device so that the space inside the container is divided into multiple air volume areas in the longitudinal direction; that is, each air supply area in the transverse direction is divided into multiple air volume areas, and the sum of the air volume of each air volume area in the transverse direction is distributed by controlling the air guide device; then the closing degree of the air valve is controlled by the wind speed of the groove, and the air volume of each air volume area in the transverse direction is controlled under the premise of distributing the air volume, thereby subdividing the space inside the container, and further controlling the air volume of the subdivided air volume areas by the air guide device and the air valve, thereby improving the control accuracy of the air volume of the air volume area and improving the quality of the goods transportation.

[0016] In some specific embodiments, the air guide device includes a plurality of air guide plates and a stepper motor respectively connected to each of the air guide plates; Each of the air guide plates is respectively arranged on the outside of one end of the slot, vertically arranged corresponding to the middle of each air volume area, and is connected to the stepper motor at one end away from the slot; each of the stepper motors is respectively connected to the controller, and is controlled to rotate by the controller, and when rotating, drives the end of the air guide plate close to the slot to rotate around the vertical axis of the end away from the slot.

[0017] The refrigerated container of this embodiment is provided with an air guide device including an air guide plate and a stepper motor connected to the air guide plate, and a controller controls the forward and reverse rotation of the stepper motor and the number of rotation steps to accurately control the rotation angle of the air guide plate, thereby accurately changing the air volume of the cold air flowing out of the air outlet entering one end of each slot; and improving the accuracy of air volume control in each air volume area distributed in each lateral direction.

[0018] In some specific embodiments, the controller is configured with a target value and is configured to: Obtain the difference between the index parameter and the target value; the weight of the difference to the sum of all the differences is the air volume demand weight of the air volume area; and control the air volume distribution ratio in this horizontal direction according to the sum of the air volume demand weights of the air volume areas along the same horizontal direction.

[0019] The refrigerated container of this embodiment calculates the air volume weight of each air volume area by the difference between the index parameter and the target value, thereby simplifying the algorithm and control, and improving control efficiency and control accuracy.

[0020] In some specific embodiments, the index parameter detection unit includes a temperature detection unit and a gas concentration detection unit; the air volume area is provided with the temperature detection unit and the gas concentration detection unit for detecting temperature and gas concentration; The controller is configured with a temperature target value, a gas concentration target value, a first coefficient, and a second coefficient; the first difference is equal to the difference between the temperature and the temperature target value multiplied by the first coefficient; the second difference is equal to the difference between the gas concentration and the gas concentration target value multiplied by the second coefficient; the difference is equal to the sum of the first difference and the second difference.

[0021] The refrigerated container of this embodiment is provided with an index parameter detection unit of the temperature detection unit and the gas concentration detection unit, and the first coefficient and the second coefficient of the specific gravity coefficient of each index parameter temperature and gas concentration are set to calculate the difference in the air volume demand weights used to characterize the air volume area, so that the air volume distribution and air volume control of each air volume area take into account the improvement of temperature and gas concentration, thereby improving the ability and accuracy of improving local areas in the box, and further improving the transportation quality of transported items.

[0022] In some specific embodiments, the indicator parameter threshold is not less than the target value.

[0023] The refrigerated container of this embodiment sets the index participation threshold to be no less than the target value, and can adjust the air volume of each air volume area in each lateral wind direction before reaching the targeted air supply condition, so that the air volume area in the lateral direction with a larger air volume demand weight is allocated a larger air volume, maintains the stability of the index parameters of the air volume areas in each lateral wind direction, avoids the imbalance of the index parameters of each air volume area as much as possible, and improves the stability and uniformity of the index parameters.

[0024] In some specific embodiments, the refrigerator further comprises a compressor, which is a variable frequency compressor connected to the controller and controlled by the controller; The controller is configured as follows: When at least two of the air volume demand weights of the air volume areas in the same transverse direction are relatively high, the compressor is controlled to increase the frequency.

[0025] The refrigerated container of this embodiment determines that the overall cooling capacity in the box is insufficient and the operating power of the refrigeration machine is insufficient when two or more index parameters of each air volume area in the same horizontal direction are simultaneously high, controls the compressor to increase the frequency and increase the refrigeration power, thereby ensuring the cooling capacity in the box and improving the quality of the transported items.

[0026] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 is a schematic structural diagram of a refrigerated container according to an embodiment; Figure 2 Schematic diagram of the structure of the air supply system for a refrigerated container according to an embodiment; Figure 3 Schematic diagram of the structure of the air supply system for a refrigerated container according to an embodiment; Figure 4 Schematic diagram of the structure of a refrigerated container air valve according to an embodiment; Figure 5 Schematic diagram of air volume area division for a refrigerated container according to an embodiment; Figure 6 This is a flow chart of controlling the speed of a fan of a refrigerated container according to an embodiment according to an indicator parameter; Figure 7 This is a flow chart of controlling a windshield device of a refrigerated container according to an embodiment according to an index parameter; Figure 8 This is a flow chart of controlling air volume distribution and fan speed according to index parameters for a refrigerated container according to an embodiment; Figure 9 This is a flow chart of controlling air volume distribution and fan speed according to index parameters for a refrigerated container according to an embodiment; Figure 10 is a flow chart of controlling a compressor of a refrigerated container according to an embodiment according to an index parameter; Figure 11 1 is a schematic diagram of controlling an air guide device of a refrigerated container according to an embodiment; Figure 12 1 is a schematic diagram of controlling an air guide device of a refrigerated container according to an embodiment; Figure 131 is a schematic diagram of controlling an air guide device of a refrigerated container according to an embodiment; Figure 14 1 is a schematic diagram of controlling an air guide device of a refrigerated container according to an embodiment; Figure 15 Schematic diagram of controlling an air guide device of a refrigerated container according to an embodiment.

[0029] Reference numerals, 1. Fan; 2. Box; 21. Trough; 22. Air supply area; 23. Air volume area; 3. Air valve; 4. Air guide device. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0036] A refrigerated container is one that has a heat pump refrigeration unit installed inside or outside the container. This unit blows out low-temperature cold air and delivers it to the container's storage space, preserving and freezing items inside. Refrigerated containers with refrigeration units are technologically mature and widely used. Compared to other refrigerated containers, they offer the following advantages: a wide temperature adjustment range, from room temperature to -30°C; high versatility, capable of transporting goods with varying temperature requirements; convenient automatic control; and suitability for long-distance transportation.

[0037] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 The present invention discloses a refrigerated container, which includes a box body 2; the box body 2 includes a box bottom; a plurality of parallel long grooves 21 with upper openings are formed on the box bottom, which serve as air supply ducts.

[0038] The refrigerated container also includes a refrigeration machine, which is arranged at one end of the box body 2 and includes a fan 1 and an air outlet; the fan 1 is arranged on the inner side of the air outlet; the air outlet is connected to one end of each groove 21, and is used to supply cold air to each groove 21 with a wind direction along the length direction of the groove 21, so that it is transported horizontally along the length direction of the groove 21.

[0039] The refrigerated container also includes multiple air valves 3; the air valve 3 includes a windshield, a rotating shaft, and an elastic member; the rotating shaft is vertically fixedly installed in the groove 21; the windshield is installed in the groove 21 and is rotatably connected to the rotating shaft; the elastic member is a torsional type and is fixedly connected to the rotating shaft and the windshield respectively; when air is supplied in the groove 21, the first torque of the windshield on one side of the rotating shaft is greater than the second torque on the other side of the rotating shaft. When the difference between the first torque and the second torque exceeds the torque of the elastic member, the windshield rotates, the passage area of ​​the groove 21 is reduced, and the elastic member stores energy; at least one air valve 3 is respectively arranged in the multiple grooves 21, and its longitudinal direction is distributed in one or more straight lines or curves, dividing the space in the box body 2 into multiple air supply areas 22 in the horizontal direction; each air valve 3 is the dividing point of each air supply area 22; that is, each air supply area 22 is distinguished from the air supply area 22 located behind it in the air supply direction by the air valve 3 arranged in each groove 21.

[0040] When multiple air valves 3 are arranged in the channel 21, the elastic coefficients of the elastic members of the air valves 3 distributed in sequence along the channel 21 from one end of the channel 21 are reduced in sequence; when the wind speed in the channel 21 is high, the air valve 3 near the air outlet is closed to a greater extent, the passage area of ​​the channel 21 at the corresponding position becomes smaller, and the air supply area 22 in front of it increases the air output; when the wind speed in the channel 21 is medium, the torque of the elastic member of the air valve 3 near the air outlet cannot be overcome, and the opening degree of the air valve 3 near the air outlet is reduced. The opening degree is large, and the air valve 3 located in the middle is closed to a large extent, the passage area of ​​the groove 21 at the corresponding position becomes smaller, and the air supply area 22 in front of it increases the air output; when the wind speed in the groove 21 is low, the torque of the elastic part of the air valve 3 near the air outlet and the middle of the groove 21 cannot be overcome, and the opening degree is large. The passage area of ​​the groove 21 at the corresponding position is large, so that the air volume is transported to the end of the groove 21 and discharged upward, increasing the upper air output of the air supply area 22 at the end of the groove 21.

[0041] The refrigerated container also includes multiple index parameter detection units, which are respectively arranged in each air supply area 22 for detecting the index parameters of each air supply area 22; that is, each air supply area 22 is respectively provided with at least one index parameter detection unit for detecting at least one type of index parameter thereof.

[0042] The refrigerated container further includes a controller, which is connected to each index parameter detection unit and the fan 1, and is configured with index parameter thresholds and fan speeds from high to low corresponding to each air supply area 22 distributed along the channel 21 starting from the air outlet, and is configured as follows: Circularly obtain the index parameters of each air supply area 22; compare the index parameters with the index parameter threshold; when at least one index parameter reaches or exceeds the index parameter threshold, control the operation of the fan 1 according to the fan speed corresponding to the air supply area 22 with the index parameter exceeding the index parameter threshold, increase the closing degree of the air valve 3 after the air supply area 22 with the higher index parameter, and increase the upper air outlet of the air supply area 22 with the higher index parameter.

[0043] That is, the control is carried out according to the following process: S1. Obtain index parameters of each air supply area 22; S2: Whether the indicator parameter reaches or exceeds the indicator parameter threshold; if yes, execute S3; if not, execute S1; S3. Control the rotation speed of the fan 1 according to the position of the air supply area 22 where the indicator parameter exceeding the indicator parameter threshold is located.

[0044] That is, the controller determines the speed of the fan 1 according to the distance between the air supply area 22 where the higher index parameter among the index parameters that reach or exceed the index parameter threshold is located and one end of the slot 21; the closer the distance, the higher the fan speed, and the higher the wind speed of the supply air, which increases the degree of closure of the air valve 3 closer to one end of the slot 21, thereby increasing the air output of the air supply area 22 located in front of it; the farther the distance, the smaller the fan speed, and the lower the wind speed of the supply air, which reduces the degree of closure of each air valve 3 located at the front end and transmits the air volume backward to reach the air supply area 22 corresponding to the high index parameter and increase the degree of closure of the air valve 3 on its rear side, thereby achieving the purpose of targeted multi-air supply.

[0045] The refrigerated container of the present invention divides the space inside the container body 2 into a plurality of air supply areas 22 in the transverse direction by means of air valves 3 disposed within the channel 21. The elastic coefficients of the elastic members of the air valves 3 distributed along the channel 21 from one end thereof are arranged from high to low. The air supply area requiring increased air supply volume is determined based on a comparison between an index parameter and an index parameter threshold, and the fan 1 is controlled to operate at the corresponding fan speed. When the air supply area 22 where the air supply volume needs to be increased is close to the air outlet, the fan 1 is controlled to operate at a higher fan speed; this high speed is used to enable the combined torque of the wind shield relative to both sides of the rotating shaft to overcome the torque of the elastic member with a larger elastic coefficient, thereby causing the air valve 3 with a higher elastic coefficient close to the air outlet to close to a greater extent. Here, the passage area of ​​the slot 21 is reduced, and the air supply passage resistance is increased, thereby increasing the air output from the front air supply area 22; When the air supply area 22 requiring increased air supply is located in the middle region of the channel 21, the fan 1 is controlled to operate at a medium fan speed; the medium fan speed is used to enable the combined torque of the wind blocking member relative to the two sides of the rotating shaft to overcome the torque of the elastic member with a medium elastic coefficient, so that the wind valve 3 with a large elastic coefficient located close to the air outlet is less closed or not closed, and the wind valve 3 with a medium elastic coefficient in the middle is more closed, the passing area of the middle channel 21 is reduced, the air supply passing resistance is increased, and thus the upper air supply of the air supply area 22 in front of the middle wind valve 3 is increased. When the air supply area 22 requiring increased air supply is close to the end of the channel 21, the fan 1 is controlled to operate at the lowest fan speed; at this time, the low air speed in the channel 21 enables the combined torque of the wind valve relative to the two sides of the rotating shaft to be unable to overcome the torque of any elastic member, all the wind valves are opened, and all have a large passing area, so that the air supply reaches the end of the channel 21 and is discharged from the upper side opening, increasing the upper air supply of the air supply area 22 at the end of the channel 21; the purpose of weakening the high index parameter of the air supply area 22 is achieved, the uniformity of the index parameter distribution in the refrigerated container is improved, and the quality of the transported goods is improved.

[0046] The specific structure, control process and principle of the refrigerated container of the present application will be described in detail below through specific embodiments.

[0047] In some specific embodiments, with reference to Figure 4 , the wind blocking member can separate the channel to form a first airflow passage and a second airflow passage, and the wind blocking member comprises: a first rotating blade portion having a first side and a second side, the minimum distance from the first side to the wall of the first airflow passage opposite thereto is smaller than the minimum distance from the second side to the wall of the second airflow passage opposite thereto; a second rotating blade portion having a third side and a fourth side, the minimum distance from the third side to the wall of the first airflow passage opposite thereto is greater than the minimum distance from the fourth side to the wall of the second airflow passage opposite thereto; the first side and the third side are located on the same side, and the second side and the fourth side are located on the same side.

[0048] When the airflow flows through the container air duct, it will enter the first airflow passage and the second airflow passage and contact the first rotating blade portion, respectively. Due to the different minimum distances of the first side and the second side of the first rotating blade portion from the walls opposite to the two airflow passages, the airflow flow rates at the first airflow passage and the second airflow passage are different. According to Bernoulli's principle, the different airflow flow rates generate a pressure difference at the first side and the second side, and the generated pressure difference causes the first rotating blade portion to generate a torque in the first direction; Similarly, when the airflow flows through the second rotating blade section, due to the different minimum distances between the third side and the fourth side and the two airflow channel walls, the airflow will also generate a pressure difference at the third side and the fourth side. The second rotating blade section generates a torque along the second direction, wherein the second direction is opposite to the first direction. Under the action of the two rotating blade sections in opposite directions, a torque is generated to rotate the rotating component. When the torque is greater than the reverse torque generated by the elastic coefficient of the elastic member, the wind shield rotates and the passage area of ​​the groove is reduced.

[0049] In some specific embodiments, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 The elastic member is a coil spring, one end of which is fixedly connected to the rotating shaft and the other end is fixedly connected to the wind shield member; when there is no wind in the groove 21, the closing degree of the wind shield member is the smallest and the elastic member is in the initial state; when air is supplied in the groove 21, the wind shield member rotates to overcome the torsional force of the elastic member, its closing degree increases, and the elastic member produces elastic deformation.

[0050] The refrigerated container of this embodiment uses a coil spring with a longer rotation stroke through an elastic member to extend the rotation stroke and stability of the air valve, thereby expanding the wind speed range of controlling the rotation of the air valve, meeting the needs of the refrigerated container for air supply at different wind speeds, and improving the accuracy of wind speed control.

[0051] In some specific embodiments, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 The elastic member is a cylindrical coil spring, the inner diameter of which is adapted to the rotating shaft and is mounted on the rotating shaft.

[0052] The refrigerated container of this embodiment uses a cylindrical coil spring as the elastic member and is mounted on the rotating shaft, thereby improving the stability and reliability of the deformable elastic member, thereby improving the stability and reliability of the air valve 3 and increasing the service life of the air valve 3.

[0053] In some specific embodiments, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 , each air valve 3 is respectively arranged at at least one identical position of each groove 21; that is, the air valve 3 in each groove 21 is distributed along at least one straight line, so that the space inside the box 2 is divided into at least two air supply areas 22 in the horizontal direction.

[0054] The controller is configured to obtain the highest index parameter when at least one index parameter exceeds the index parameter threshold value, and control the fan 1 to operate at the fan speed corresponding to the air supply area 22 where the highest index parameter is located.

[0055] The refrigerated container of the embodiment sets different air supply areas 22 corresponding to different fan speeds, and controls the fan 1 to operate at the fan speed corresponding to the air supply area 22 where the highest value of the index parameter exceeding the index parameter threshold value is located, which first solves the problem of increasing the air supply amount in the air supply area with the highest index parameter, and improves the pertinence of air supply.

[0056] In some specific embodiments, referring to Figure 1 , Figure 2 , Figure 3 , the air valves 3 in the channel 21 are arranged in two straight lines in the transverse direction, so that the space in the box 2 is divided into two air supply areas 22 in the transverse direction. The fan speed can be two, which are high speed and low speed.

[0057] In some specific embodiments, referring to Figure 5 , the air valves 3 in the channel 21 are arranged in two straight lines in the transverse direction, so that the space in the box 2 is divided into two air supply areas 22 in the transverse direction. The fan speed can be two, which are high speed and low speed.

[0058] In some specific embodiments, referring to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , the elastic coefficients of the elastic members of the air valves 3 distributed along the channel 21 in sequence from one end of the channel 21 decrease in sequence.

[0059] That is, the elastic coefficients of the elastic members of the air valves 3 gradually away from one end of the channel 21 are set from high to low, so that when the fan 1 operates at the fan speed corresponding to the air supply area 22 or when the fan 1 operates from high speed to low speed, the closing degree of the air valve 3 in the front side of the air supply area 22 is less than that of the air valve 3 in the rear side of the air supply area 22, thereby increasing the upward air supply amount of the air supply area 22 corresponding to the fan speed.

[0060] That is, when the fan 1 operates at the fan speed corresponding to the air supply area 22, the air valve 3 in the front side of the air supply area 22 blocks a part of the cold air from entering the channel 21 in the air supply area 22, so that the air speed decreases. To increase the air supply amount of the air supply area 22, the elastic coefficient of the elastic member of the air valve 3 in the rear side thereof needs to be reduced, so that the rotation angle of the air blocking member is increased.

[0061] The refrigerated container of this embodiment is provided with elastic coefficients of elastic parts of each air valve 3 on the front and rear sides of each air supply area 22, which decrease successively. When the index parameters of each air supply area 22 exceed the threshold and a larger air volume is required, the air outlet volume and air supply speed can be accurately controlled by controlling the rotation speed of the fan 1, thereby improving the control accuracy of the air outlet volume of the air supply area 22.

[0062] In some specific embodiments, referring to Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 The refrigerated container further includes an air guide 4 disposed between the fan 1 and one end of each channel 21, that is, disposed within the air outlet or between the air outlet and one end of each channel 21. This allows each air supply area 22 to form multiple air volume areas 23 in the longitudinal direction. The air volume of each air volume area 23 in the air supply area 22 can be varied by changing the air guide angle of the air guide 4. In other words, each air supply area 22 includes multiple air volume areas 23 of the same number.

[0063] Each air volume area 23 is respectively provided with at least one index parameter detection unit for detecting at least one index parameter of each air volume area 23 .

[0064] The air guide device 4 is connected to the controller and controlled by the controller; the controller is configured to cyclically obtain the index parameters of each air volume area 23, and control the air guide device 4 according to the index parameters, so that each air volume area 23 with a higher sum of the index parameters of each air volume area 23 in the lateral direction is allocated a larger air volume; and then the air outlet of each air volume area 23 is controlled by the opening of the air valve 3 in the same lateral direction for distinguishing each air volume area 23.

[0065] That is, the controller controls the air guide device 4 according to the following process: S1. Obtain parameters of each indicator; S4. Control the air guide device 4 according to the index parameters. A higher air supply volume is obtained when the sum of the index parameters of the air volume areas 23 in the lateral direction is higher.

[0066] The refrigerated container of this embodiment is provided with an air guide device 4 so that the space inside the box body 2 is divided into multiple air volume areas 23 in the longitudinal direction; that is, each air supply area 22 in the transverse direction is divided into multiple air volume areas 23, and the sum of the air volume of each air volume area 23 in the transverse direction is distributed by controlling the air guide device 4; then the closing degree of the air valve 3 is controlled by the wind speed of the groove 21, and then the air volume of each air volume area 23 in the transverse direction is controlled under the premise of distributing the air volume, thereby subdividing the space inside the box body 2, and further controlling the air volume of the subdivided air volume areas 23 by the air guide device 4 and the air valve 3, thereby improving the control accuracy of the air volume of the air volume area 23 and improving the quality of the goods transportation.

[0067] In some specific embodiments, referring to Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 The air guide device 4 includes multiple air guide plates and stepper motors connected to each air guide plate; each stepper motor is connected to a controller, which controls the forward or reverse operation and the number of rotation steps, thereby controlling the rotation direction and rotation angle of the air guide plate.

[0068] Each air guide plate is respectively arranged on the outside of one end of the groove 21, and is vertically arranged corresponding to the middle of each air volume area 23, and the end away from the groove 21 is connected to the stepper motor; each stepper motor is respectively connected to the controller, and the rotation is controlled by the controller, and when rotating, it drives the end of the air guide plate close to the groove 21 to rotate around the vertical axis of the end away from the groove 21.

[0069] The refrigerated container of this embodiment is provided with an air guide device 4 including an air guide plate and a stepper motor connected to the air guide plate, and a controller controls the forward and reverse rotation and the number of rotation steps of the stepper motor to accurately control the rotation direction and rotation angle of the air guide plate, thereby accurately changing the air volume of the cold air flowing out of the air outlet entering one end of each groove 21; and improving the accuracy of air volume control in each air volume area 23 distributed in each lateral direction.

[0070] In some specific embodiments, referring to Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 , the controller is configured with a target value, which is the ideal value or desired value of the indicator parameter in box 2; the controller configuration is: Circularly obtain each indicator parameter and the difference between each indicator parameter and the target value; obtain the weight of each difference in the sum of each difference according to each difference, which is the air volume demand weight corresponding to each air volume area 23; Obtain the sum of the air volume demand weights of each air volume area 23 in the same horizontal direction; control the air guide device 4 according to the sum of the air volume demand weights of each air volume area 23 in each horizontal direction so that the total air volume is distributed according to the sum of the air volume demand weights of each air volume area 23 in each horizontal direction.

[0071] The fan speed of the fan 1 is controlled according to the position of the highest air volume area 23 among the index parameters of each air volume area 23 in each lateral direction; when the highest air volume area 23 with the index parameter is located near one end of the slot 21, the fan 1 is controlled to operate at a corresponding higher fan speed; when the highest air volume area 23 with the index parameter is located near the other end of the slot 21, the fan 1 is controlled to operate at a corresponding lower fan speed.

[0072] That is, each air volume area 23 in the transverse wind direction corresponds to a different fan speed, and the fan speed decreases in sequence from one end to the other end of the slot 21 in each air volume area 23; the operation of the fan 1 is controlled according to the fan speed corresponding to the air volume area 23 where the highest index parameter is located.

[0073] That is, the controller performs control according to the following process: S11, obtaining index parameters of each air volume area 23; S12, obtaining the difference of each index parameter, the sum of each difference, and the weight of each difference in the sum of all differences, which is the air volume demand weight corresponding to the air volume area 23; S31, controlling the air guide device 4 to distribute air volume according to the sum of the air volume demand weights of the air volume areas 23 in each lateral direction; S21 , controlling the rotation speed of the fan 1 according to the air volume area 23 where the highest difference value is located.

[0074] The refrigerated container of this embodiment calculates the air volume weight of each air volume area 23 by the difference between the index parameter and the target value, thereby simplifying the algorithm and control, and improving control efficiency and control accuracy.

[0075] In some specific embodiments, referring to Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 The index parameter detection unit includes a temperature detection unit and a gas concentration detection unit; each air volume area 23 is respectively provided with a temperature detection unit and a gas concentration unit for detecting the temperature and gas concentration of each air volume area 23; the gas concentration can be the concentration of harmful gases such as ethylene.

[0076] The controller is configured with a temperature target value and a gas concentration target value; that is, the target value includes the temperature target value and the gas concentration target value; the controller is also configured with a first coefficient and a second coefficient, and is configured so that the first difference is equal to the difference between the temperature and the temperature target value multiplied by the first coefficient, and the second difference is equal to the difference between the gas concentration and the gas concentration target value multiplied by the second coefficient; the difference is equal to the sum of the first difference and the second difference.

[0077] The control flow of the controller is as follows: S13, obtaining the temperature and gas concentration of each air volume area 23; S14, obtaining the first difference and the second difference of each air volume area 23; S15. Obtain the difference value of each air volume area 23, the sum of each difference value, and the weight of each difference value to the sum of each difference value, that is, the air volume demand weight of each air volume area 23; S31, controlling the air guide device 4 to distribute air volume according to the sum of the air volume demand weights of the air volume areas 23 in each lateral direction; S21, controlling the rotating speed of the fan 1 according to the position of the air volume region 23 corresponding to the highest difference value or the highest air volume demand weight.

[0078] The refrigerated container of the embodiment improves the air volume distribution and air volume control of each air volume region 23 by taking into account the temperature and gas concentration, improves the ability and accuracy of improving the local region in the container 2, and further improves the transportation quality of the transported goods.

[0079] In some specific embodiments, with reference to Figure 3 , Figure 5 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 The air guiding device 4 includes three air guiding plates, which longitudinally divide the air supply region 22 into three air volume regions 23.

[0080] With reference to Figure 10 , each air guiding plate corresponds to the middle part of each air volume region 23, and when it is in the middle position, the air volume distribution in each transverse direction is equal.

[0081] With reference to Figure 11 , when each air guiding plate rotates leftward from the middle position, the air supply volume of each air volume region 23 from left to right decreases in turn.

[0082] With reference to Figure 12 , when each air guiding plate rotates rightward from the middle position, the air supply volume of each air volume region 23 from left to right increases in turn.

[0083] With reference to Figure 13 , when the left air guiding plate rotates rightward from the middle position and the middle and right air guiding plates are in the middle position, the air supply volume of the middle air volume region 23 is the largest; the air volume of the left air volume region 23 is the smallest; and the air volume of the right air volume region 23 is in the middle.

[0084] With reference to Figure 14 , when the left air guiding plate rotates rightward from the middle position, the middle air guiding plate is in the middle position, and the right air guiding plate rotates leftward from the middle position, the air supply volume of the middle air volume region 23 is the largest; the air volume of the left air volume region 23 is equal to that of the right air volume region 23 and is smaller than the air supply volume of the middle air volume region 23.

[0085] Of course, the same air supply region 22 can be divided into a plurality of air volume regions 23 with different numbers by setting air guiding devices 4 with different structures or configurations, and different air volume distribution schemes of each air volume region 23 can be realized by controlling the rotating direction and rotating angle of the air guiding plates of the air guiding device 4 in different strategies.

[0086] In some specific embodiments, the indicator parameter threshold is not less than the target value.

[0087] The refrigerated container of this embodiment sets the index participation threshold to be no less than the target value, and can adjust the air volume of each air volume area 23 in each lateral wind direction before reaching the targeted air supply condition, so that the air volume area 23 in the lateral direction with a larger air volume demand weight is allocated a larger air volume, maintains the stability of the index parameters of the air volume areas 23 in each lateral wind direction, avoids the imbalance of the index parameters of each air volume area 23 as much as possible, and improves the stability and uniformity of the index parameters.

[0088] In some specific embodiments, referring to Figure 10 The refrigeration machine also includes a compressor, which is a variable frequency compressor connected to the controller and controlled by the controller.

[0089] The controller configuration is: When at least two of the air volume demand weights of the air volume areas 23 in the same transverse direction are relatively high, the compressor is controlled to increase the frequency.

[0090] That is, the compressor is controlled according to the following process: S5. Determine whether the two air volume areas 23 with the highest difference or air volume demand weight are located in the same horizontal direction; if so, execute S5; S6, control the compressor frequency increase.

[0091] The refrigerated container of this embodiment determines that the overall cooling capacity in the box 2 is insufficient and the operating power of the refrigeration machine is insufficient when two or more index parameters of each air volume area 23 in the same horizontal direction are simultaneously high, controls the compressor to increase the frequency and increase the refrigeration power, thereby ensuring the cooling capacity in the box 2 and improving the quality of the transported items.

[0092] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0093] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A refrigerated container, characterized in that: include: The box body comprises a box bottom; a plurality of parallel grooves with upper openings are formed on the box bottom; The plurality of channels form a plurality of air supply areas arranged at least along the extending direction of the channels; A cooling machine, comprising a fan and an air outlet; the fan is arranged inside the air outlet; the air outlet is connected to one end of each of the slots; A plurality of index parameter detection units; at least one index parameter detection unit is respectively provided in the plurality of air supply areas for detecting index parameters; In the plurality of channels, a plurality of air valves are respectively provided between the plurality of air supply areas arranged along the extending direction of the channels; The air valve includes a windshield, a rotating shaft, and an elastic member; the rotating shaft is vertically fixedly installed in the channel; the windshield is rotatably connected to the rotating shaft; the elastic member is a torsion type, and is fixedly connected to the rotating shaft and the windshield, respectively; when air is supplied into the channel and the combined torque of the windshield on both sides of the rotating shaft is greater than the torque of the elastic member, the windshield rotates, and the passage area of ​​the channel is reduced; The elastic coefficients of the elastic members of the air valves distributed in sequence along the channel from one end of the channel close to the air outlet are reduced in sequence; The refrigerated container also includes a controller, which is respectively connected to the multiple index parameter detection units and the fan. The controller is configured with fan speeds that decrease in sequence corresponding to the multiple air supply areas arranged along the extension direction of the groove near the air outlet. The controller is used to cyclically obtain the index parameters and compare them with the index parameter threshold. When at least one index parameter is greater than the index parameter threshold, the controller adjusts the fan speed to the fan speed corresponding to the air supply area corresponding to the index parameter greater than the index parameter threshold.

2. The refrigerated container according to claim 1, characterized in that: The elastic member is a coil spring, one end of which is fixedly connected to the rotating shaft and the other end is fixedly connected to the wind shield member; when there is no wind in the groove, the elastic member is in its original state; the communication area of ​​the groove is the largest; when wind is supplied to the groove and the wind shield member rotates, the elastic member is deformed and the passage area of ​​the groove becomes smaller.

3. The refrigerated container according to claim 2, characterized in that: The elastic member is a cylindrical coil spring, the inner diameter of which is adapted to the rotation shaft and is sleeved on the rotation shaft.

4. The refrigerated container according to claim 1, wherein: The controller is configured to obtain the highest index parameter among the index parameters that exceed the index parameter threshold when at least one index parameter exceeds the index parameter threshold; and control the fan to operate at the fan speed corresponding to the air supply area where the highest index parameter is located.

5. The refrigerated container according to any one of claims 1 to 4, characterized in that: It also includes an air guide device, which is arranged between the fan and one end of each of the slots close to the fan, so that each of the air supply areas forms a plurality of air volume areas in the longitudinal direction; At least one index parameter detection unit is respectively provided in each of the air volume areas; The air guide device is connected to the controller; the controller is configured to cyclically obtain the index parameters and control the air guide device according to each index parameter to change the proportion of the air supply volume of each air volume area in the longitudinal direction.

6. The refrigerated container according to claim 5, characterized in that: The air guide device includes a plurality of air guide plates and a stepper motor respectively connected to each of the air guide plates; Each of the air guide plates is respectively arranged on the outside of one end of the slot, vertically arranged corresponding to the middle of each air volume area, and is connected to the stepper motor at one end away from the slot; each of the stepper motors is respectively connected to the controller, and is controlled to rotate by the controller, and when rotating, drives the end of the air guide plate close to the slot to rotate around the vertical axis of the end away from the slot.

7. The refrigerated container according to claim 5, characterized in that: The controller is configured with a target value and is configured to: Obtain the difference between the index parameter and the target value; the weight of the difference to the sum of all the differences is the air volume demand weight of the air volume area; and control the air volume distribution ratio in this horizontal direction according to the sum of the air volume demand weights of the air volume areas along the same horizontal direction.

8. The refrigerated container according to claim 7, characterized in that: The index parameter detection unit includes a temperature detection unit and a gas concentration detection unit; the air volume area is provided with the temperature detection unit and the gas concentration detection unit for detecting temperature and gas concentration; The controller is configured with a temperature target value, a gas concentration target value, a first coefficient, and a second coefficient; a first difference is equal to a difference between the temperature and the temperature target value multiplied by the first coefficient; The second difference is equal to the difference between the gas concentration and the target gas concentration value multiplied by the second coefficient; the difference is equal to the sum of the first difference and the second difference.

9. The refrigerated container according to claim 7, characterized in that: The indicator parameter threshold is not less than the target value.

10. The refrigerated container according to claim 5, characterized in that: The refrigerator further comprises a compressor, which is a variable frequency compressor connected to the controller and controlled by the controller; The controller is configured as follows: When at least two of the index parameters of the air volume areas in the same transverse direction exceed the index parameter threshold, the compressor is controlled to increase the frequency.

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