Determination device, refrigeration device for container, container, determination system, determination method, and program

Abstract

A determination device (80) is provided with: a storage unit (81) that stores data relating to the influence of a position difference between a sensor (65) and a target member (T) on a detection value relating to the degree of impact detected by the sensor (65) disposed in a container (10) having the target member (T); the processing unit (82) finds, as an estimated value, the degree of impact acting on the target member (T) on the basis of the detection value of the sensor (65) and the data stored in the storage unit (81).

Description

Technical Field

[0001] The present disclosure relates to a determination device, a refrigeration device for a container, a container, a determination system, a determination method, and a program. Background Art

[0002] There is known a container including a container body for marine transportation or land transportation and a refrigeration device for the container that cools the interior of the container body. The refrigeration device for a container disclosed in Patent Document 1 includes: a detection unit that detects a physical quantity for determining whether a strong impact has been applied to the container; and an abnormality diagnosis unit that determines whether the refrigeration device for the container is in an abnormal state based on the physical quantity. Patent Document 1 describes using an impact sensor that is provided at the refrigeration device for the container and detects acceleration as the detection unit. Prior Art Documents Patent Documents

[0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2020-101327 Summary of the Invention -Technical Problem to be Solved by the Invention-

[0004] However, the following problem exists in the existing method: due to the influence caused by the difference in the positions of the sensor and the target component in the container, the degree of impact applied to the target component cannot be detected with high precision.

[0005] The present disclosure provides a determination device that can accurately obtain the degree of impact applied to a target component when the target component and the sensor are arranged at different positions in a container. -Technical Solution for Solving the Technical Problem-

[0006] A first aspect is directed to a determination device including a storage unit 81 and a processing unit 82. The storage unit 81 stores data related to the influence of the position difference between the sensor 65 and the target component T on the detection value related to the impact degree, where the detection value related to the impact degree is detected by the sensor 65 arranged at the container 10 having the target component T. The processing unit 82 obtains the degree of impact applied to the target component T as an estimated value based on the detection value of the sensor 65 and the data stored in the storage unit 81.

[0007] In a first aspect, a sensor 65 is arranged at a container 10. The sensor 65 detects an index related to the degree of impact. A storage unit 81 stores data related to the influence caused by the positional difference between the sensor 65 and an object component T. A processing unit 82 estimates the degree of impact acting on the object component T based on the detection value of the sensor 65 and the data stored in the storage unit 81. Therefore, the processing unit 82 can obtain, as an estimated value, the degree of impact acting on the object component T with a small error, where the error is caused by the influence resulting from the positional difference between the sensor 65 and the object component. As a result, even if the object component T and the sensor 65 are located at different positions, the degree of impact acting on the object component T can be obtained with high accuracy.

[0008] In a second aspect based on the first aspect, if the estimated value exceeds a first threshold, the processing unit 82 determines that the object component T is in an abnormal state.

[0009] In the second aspect, if the estimated value exceeds the first threshold, the processing unit 82 determines that the object component T is in an abnormal state. Thereby, it is possible to determine an abnormal state caused by a large impact acting on the container 10.

[0010] In a third aspect based on the first or second aspect, if the number of times the estimated value exceeds a second threshold exceeds a specified number of times, the processing unit 82 determines that the object component T is in an abnormal state.

[0011] In the third aspect, if the number of times the estimated value exceeds the second threshold exceeds the specified number of times, the processing unit 82 determines that the object component T is in an abnormal state. Thereby, it is possible to determine an abnormal state caused by a certain degree of impact repeatedly acting on the container 10.

[0012] In a fourth aspect based on any one of the first to third aspects, the storage unit 81 stores the estimated value, and the processing unit 82 determines whether the object component T is in an abnormal state based on the estimated value stored in the storage unit 81.

[0013] In the fourth aspect, the processing unit 82 can use the past estimated value to determine whether the object component T is in an abnormal state.

[0014] In a fifth aspect based on the fourth aspect, the processing unit 82 determines that fatigue failure of the object component T is an abnormal state based on the estimated value.

[0015] If a small impact repeatedly acts on the object component T, the object component T will undergo fatigue failure. Therefore, the processing unit 82 in the fifth aspect uses the degree of impact acting on the object component T, i.e., the estimated value, to determine that fatigue failure of the object component T is an abnormal state.

[0016] In a sixth aspect, based on any one of the first to fifth aspects, the determination device includes a notification unit 83 that notifies an object person of historical data related to the estimated value.

[0017] In the sixth aspect, the object person can obtain historical data related to the estimated value. Therefore, the object person can grasp the state of the container 10 based on this historical data, or evaluate how the container 10 has been used, or propose a plan for how to use the container 10 in the future.

[0018] A seventh aspect relates to a refrigeration device for a container, the refrigeration device for a container including the object component T, the sensor 65, and the determination device 80 according to any one of the first to sixth aspects, and the refrigeration device for a container cools the interior of the container body 11 of the container 10.

[0019] In an eighth aspect, based on the seventh aspect, the refrigeration device for a container includes an electronic component box 60 that houses electronic components 63, and the sensor 65 is arranged inside the electronic component box 60.

[0020] In the eighth aspect, the sensor 65 is housed inside the electronic component box 60 together with the electronic components 63. Therefore, the electronic component box 60 can prevent water, dust in the air, and corrosive components generated by rainfall or the like from coming into contact with the sensor 65.

[0021] In a ninth aspect, based on the eighth aspect, the electronic components include a control board 63, and the sensor 65 is arranged on the control board 63.

[0022] In the ninth aspect, the sensor 65 is arranged on the control board 63. It is possible to easily supply driving power from a power supply unit located on the control board 63 to the sensor 65.

[0023] In a tenth aspect, based on the seventh aspect, the refrigeration device for a container includes a communication device 62 for communicating with other devices, and the sensor 65 is provided in the communication device 62.

[0024] In an eleventh aspect, based on any one of the seventh to tenth aspects, the object component T is at least one of a housing 21 of the refrigeration device 20 for a container, an electronic component box 60, a compressor 40, heat exchangers 41, 44, fans 42, 45, refrigerant pipes 52, 53, 55, 57, valves 51, 58, 59, and a container body 11.

[0025] In the eleventh aspect, the processing unit 82 estimates the degree of impact acting on at least one of the housing 21 of the container refrigeration device 20, the electronic component box 60, the compressor 40, the heat exchangers 41, 44, the fans 42, 45, the refrigerant pipes 52, 53, 55, 57, the valves 51, 58, 59, and the container body 11.

[0026] The twelfth aspect relates to a container including the target component T according to any one of the first to sixth aspects, the sensor 65, and the determination device 80.

[0027] The thirteenth aspect is directed to a determination system including a server device 91 having a storage unit 81 and a processing device 70 having a processing unit 82. The storage unit 81 stores data related to the influence of the positional difference between the sensor 65 and the target component T on the detection value related to the degree of impact. The detection value related to the degree of impact is detected by the sensor 65 disposed at the container 10 having the target component T. The processing unit 82 obtains the degree of impact acting on the target component T as an estimated value based on the detection value of the sensor 65 and the data stored in the storage unit 81.

[0028] In the thirteenth aspect, the storage unit 81 of the server device 91 stores data related to the influence caused by the positional difference between the sensor 65 and the target component T. The processing unit 82 of the processing device 70 estimates the degree of impact acting on the target component T based on the detection value of the sensor 65 and the data stored in the storage unit 81 of the server device 91. Therefore, the processing unit 82 can obtain the degree of impact acting on the target component T with a small error as an estimated value, where the error is caused by the influence of the positional difference between the sensor 65 and the target component. As a result, even if the target component T and the sensor 65 are located at different positions, the degree of impact acting on the target component T can be obtained with high accuracy.

[0029] In the fourteenth aspect, based on the thirteenth aspect, the processing device 70 sends a transmission request for requesting the server device 91 to send the data stored in the storage unit 81 to the server device 91 via the communication device 62. The server device 91 sends the data stored in the storage unit 81 to the processing device 70 via the communication device 62 according to the transmission request.

[0030] In the fourteenth aspect, the data stored in the storage unit 81 of the server device 91 can be sent to the processing device 70 according to the transmission request from the processing device 70.

[0031] The fifteenth aspect relates to a determination method, which includes a storage step and a speculation step. In the storage step, data related to the influence of the positional difference between the sensor 65 and the object component T on the detection value related to the impact degree is stored. The detection value related to the impact degree is detected by the sensor 65 arranged at the container 10 having the object component T. In the speculation step, based on the detection value of the sensor 65 and the data stored in the storage step, the degree of the impact acting on the object component T is obtained as a speculation value.

[0032] The sixteenth aspect relates to a program that causes a computer to execute a storage step and a speculation step. In the storage step, data related to the influence of the positional difference between the sensor 65 and the object component T on the detection value related to the impact degree is stored. The detection value related to the impact degree is detected by the sensor 65 arranged at the container 10 having the object component T. In the speculation step, based on the detection value of the sensor 65 and the data stored in the storage step, the degree of the impact acting on the object component T is obtained as a speculation value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a longitudinal sectional view obtained by cutting the refrigeration device for a container according to the embodiment in the front-rear direction; Figure 2 is a perspective view of the refrigeration device for a container observed from the front; Figure 3 is a piping system diagram of the refrigeration device for a container; Figure 4 is a block diagram showing the main constituent devices of the refrigeration device for a container; Figure 5 shows an example of the data stored in the storage unit; Figure 6 is a flowchart of the operation of the determination device; Figure 7 shows an example of the S-N curve diagram used in the determination device according to Modification 1; Figure 8 is a flowchart of the operation of the determination device according to Modification 1; Figure 9 is a perspective view of the refrigeration device for a container according to Modification 5 observed from the front; Figure 10 is a block diagram showing the overall structure of the determination system according to Modification 7; Figure 11 is a diagram showing an example of the hardware structure of the server device; Figure 12 is a sequence diagram of the operation of the determination system according to Modification 7; Figure 13 It is a flowchart of the state determination process of Modification Example 7. Specific Embodiments

[0034] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the present disclosure is not limited to the embodiments shown below, and various modifications can be made without departing from the technical idea of the present disclosure. Each drawing is used to conceptually illustrate the present disclosure, and therefore, for ease of understanding, the dimensions, ratios, or quantities may be exaggerated or simplified as needed.

[0035] (1) Overall Structure of the Container Refer to Figures 1 to 4 to describe the container 10 of this embodiment. It should be noted that in the following description, statements related to "front", "rear", "left", "right", "top", and "bottom" are all based on the direction indicated by the arrow in Figure 2 .

[0036] The container 10 is used for maritime transportation. The container 10 is a refrigerated container having a function of cooling the air inside it. The container 10 has a container body 11 and a container refrigeration device 20. The container body 11 is used for storing fresh products such as food and plants. The container refrigeration device 20 cools the internal space 12 of the container body 11. Hereinafter, the internal space 12 may sometimes be referred to as the inside of the box, and the space outside the container body 11 may be referred to as the outside of the box. As Figure 2 shown, an opening 13 is formed on the front surface of the container body 11. The container refrigeration device 20 is installed on the container body 11 so as to close the opening 13 of the container body 11.

[0037] (2) Container Refrigeration Device The container refrigeration device 20 has a housing 21. The housing 21 forms a cover for the opening 13 of the container body 11. The housing 21 has a housing main body 22 and a partition 23. The housing main body 22 separates the inside and outside of the container body 11. The partition 23 is arranged on the back side (rear side) of the housing 21 and is located in the internal space 12.

[0038] The container refrigeration device 20 has a compressor 40, an outdoor heat exchanger 41, and an outdoor fan 42 as elements arranged outside the box. The container refrigeration device 20 has an indoor heat exchanger 44 and an indoor fan 45 as elements arranged inside the box.

[0039] (2 - 1) Housing Main Body As Figure 1As shown, the housing main body 22 has a flat plate portion 22a and a concave portion 22b. The flat plate portion 22a is formed at the upper part of the housing main body 22 and is substantially flush with the opening 13 of the housing 21. As Figure 2 shown, two inspection windows 24 are formed at the middle portion in the left - right direction of the flat plate portion 22a. The inspection window 24 is a transparent window for confirming the inside of the housing main body 22. A ventilator 25 is provided to the left of the inspection window 24. The ventilator 25 performs ventilation inside the box.

[0040] The concave portion 22b is formed at the lower part of the housing 21. The concave portion 22b is recessed rearward from the lower end of the flat plate portion 22a. An outside - the - box storage space 26 is formed at the front side of the concave portion 22b. An inside - the - box storage space 27 is formed above the concave portion 22b and between the flat plate portion 22a and the partition plate 23. The lower end of the concave portion 22b constitutes a bottom plate 22c. The bottom plate 22c extends across the left and right ends of the housing main body 22.

[0041] The housing main body 22 is constituted by laminating an outer box housing 28, a heat - insulating layer 29, and an inner box housing 30 in the thickness direction (front - rear direction). The outer box housing 28 faces the outside of the box. The inner box housing 30 faces the inside of the box. The heat - insulating layer 29 is provided between the outer box housing 28 and the inner box housing 30. The outer box housing 28 is made of an aluminum material. The inner box housing 30 is made of fiber - reinforced plastic (FRP). The heat - insulating layer 29 is made of a foamed resin.

[0042] (2 - 2) Partition plate and air passage The partition plate 23 is a plate - shaped member located at the rear side of the concave portion 22b. The partition plate 23 extends in the up - down direction and leaves a predetermined interval from the rear surface of the concave portion 22b. An internal passage 31 for the air inside the box to flow is formed between the housing main body 22 and the partition plate 23. An inlet 32 is formed between the upper end of the partition plate 23 and the upper wall 11a of the container main body 11. The inlet 32 connects the inside - the - box space 12 with the inflow end of the internal passage 31. An outlet 33 is formed between the lower end of the partition plate 23 and the lower wall 11b of the container main body 11. The outlet 33 connects the inside - the - box space 12 with the outflow end of the internal passage 31.

[0043] (2 - 3) Components outside the box A compressor 40, an outside - the - box heat exchanger 41, and an outside - the - box fan 42 are provided in the outside - the - box storage space 26. The compressor 40 is provided on the bottom plate 22c of the housing 21. The compressor 40 is arranged at a lower position in the outside - the - box storage space 26. The compressor 40 is arranged at a right - hand position in the outside - the - box storage space 26. A liquid receiver 54 (not shown in the figure) is also provided on the bottom plate 22c. Figure 2 which is omitted in the figure.

[0044] The outdoor fan 42 is located at the upper position in the outdoor storage space 26. The outdoor fan 42 is composed of a propeller fan. The outdoor fan 42 has an impeller and a motor for driving the impeller to rotate. As Figure 2 shown, an external passage 43 for the flow of outdoor air is formed on the back side of the outdoor fan 42.

[0045] The outdoor heat exchanger 41 is disposed in the outdoor storage space 26 at a height position between the outdoor fan 42 and the compressor 40. The outdoor heat exchanger 41 is located in the external passage 43. The outdoor heat exchanger 41 is a finned tube heat exchanger.

[0046] (2 - 4) Components inside the box An indoor heat exchanger 44 and an indoor fan 45 are provided in the indoor storage space 27. The indoor heat exchanger 44 is supported by the housing 21 so as to straddle the housing main body 22 and the partition 23. The indoor heat exchanger 44 is a finned tube heat exchanger.

[0047] The indoor fan 45 is arranged on the upstream side of the indoor heat exchanger 44 in the internal passage 31. The indoor fan 45 is located above the indoor heat exchanger 44. The indoor fan 45 is composed of a propeller fan. The indoor fan 45 has an impeller and a motor for driving the impeller to rotate.

[0048] (2 - 5) Structure of the refrigerant circuit As Figure 3 shown, the refrigeration device 20 for a container has a refrigerant circuit 50. Refrigerant is filled in the refrigerant circuit 50. The refrigerant circuit 50 performs a vapor compression refrigeration cycle by circulating the refrigerant.

[0049] The refrigerant circuit 50 mainly includes a compressor 40, an outdoor heat exchanger 41, an expansion valve 51, and an indoor heat exchanger 44.

[0050] The compressor 40 compresses the inhaled refrigerant. The compressor 40 ejects the compressed refrigerant. An ejection pipe 52 is connected to the ejection part of the compressor 40. An intake pipe 53 is connected to the intake part of the compressor 40. A liquid receiver 54 is provided on the intake pipe 53. The liquid receiver 54 is a container for storing liquid refrigerant.

[0051] The outdoor heat exchanger 41 exchanges heat between the refrigerant flowing inside it and the outdoor air. The gas side end of the outdoor heat exchanger 41 communicates with the ejection pipe 52. The liquid side end of the outdoor heat exchanger 41 is connected to the liquid side end of the indoor heat exchanger 44 via a liquid pipe 55. The outdoor heat exchanger 41 functions as a heat radiator (condenser) for releasing heat from the refrigerant to the air.

[0052] The expansion valve 51 is provided on the liquid pipe 55. The expansion valve 51 reduces the pressure of the high-pressure refrigerant to a low-pressure refrigerant. The expansion valve 51 is an electronically controlled expansion valve with adjustable opening degree. A liquid receiver 56 is provided between the outdoor heat exchanger 41 on the liquid pipe 55 and the expansion valve 51. The liquid receiver 56 is a container for storing the surplus refrigerant in the refrigerant circuit 50.

[0053] The indoor heat exchanger 44 exchanges heat between the refrigerant flowing inside it and the indoor air. The gas-side end of the indoor heat exchanger 44 communicates with the suction pipe 53. The indoor heat exchanger 44 functions as an evaporator that absorbs heat from the air by the refrigerant.

[0054] The refrigerant circuit 50 has a bypass pipe 57. The inflow end of the bypass pipe 57 communicates with the discharge pipe 52, and the outflow end of the bypass pipe 57 communicates with the liquid pipe 55. The bypass pipe 57 conveys the refrigerant discharged from the compressor 40 around the outdoor heat exchanger 41 to the indoor heat exchanger 44.

[0055] A first valve 58 and a second valve 59 are provided in the refrigerant circuit 50. The first valve 58 is provided between the discharge side of the compressor 40 and the gas-side end of the outdoor heat exchanger 41, and at a position more downstream than the connection part of the bypass pipe 57. The second valve 59 is provided on the bypass pipe 57. The first valve 58 and the second valve 59 are constituted by electromagnetic on-off valves. The first valve 58 and the second valve 59 can be flow control valves with adjustable opening degree.

[0056] (2 - 6) Electronic component box As Figure 2 shown, an electronic component box 60 is provided in the housing 21. The electronic component box 60 houses electronic components such as a control substrate 63, a power supply circuit substrate, power supply terminals, and other electronic devices. The electronic component box 60 is provided at the middle part in the vertical direction of the housing 21. The electronic component box 60 has a box body 60a with an open front side and a lid 60b that closes the open part of the box body 60a. The box body 60a is formed in a substantially rectangular parallelepiped shape with a hollow interior. The lid 60b is fixed to the box body 60a by a hinge (not shown). The lid 60b is configured to be able to open and close the front opening surface of the box body 60a. A sealing member for preventing water and air from entering is provided between the electronic component box 60 and the lid 60b. The electronic component box 60 is made of a resin material.

[0057] In the first space 61 inside the electronic component box 60, a communication device 62 and a control substrate 63 are housed.

[0058] The communication device 62 is a communication interface for enabling the container refrigeration device 20 to communicate with other external devices (terminal devices). The communication device 62 is composed of a modem. The communication device 62 sends the information of the container refrigeration device 20 to the terminal device. The communication device 62 receives the information from the terminal device. The communication device 62 is arranged at approximately the middle part in the left - right direction in the first space 61. The outer shape of the communication device 62 is a substantially rectangular parallelepiped shape with the left - right direction being the thickness direction.

[0059] The control board 63 is a printed circuit board on which a control circuit for controlling each device of the container refrigeration device 20 is installed. Wiring for power supply or grounding is also installed on the control board 63. The control board 63 is arranged in the so - called low - voltage space in the first space 61. In this example, the control board 63 is supported by the electronic component box 60 with the thickness direction of the board being the front - back direction. The control board 63 is formed to have a relatively long length in the up - down direction.

[0060] (2 - 7) Acceleration sensor As Figure 2 shown, the container refrigeration device 20 is provided with an acceleration sensor 65. The acceleration sensor 65 is a sensor for detecting the degree of impact acting on the object part T. The acceleration sensor 65 detects the acceleration [G] as an index (physical quantity) related to the degree of impact of the object part T.

[0061] The acceleration sensor 65 of this embodiment is composed of a tri - axial acceleration sensor. Among these three axes, the X - axis corresponds to Figure 2 the front - back direction, the Y - axis corresponds to Figure 2 the left - right direction, and the Z - axis corresponds to the up - down direction.

[0062] The acceleration sensor 65 is arranged in the first space 61 inside the electronic component box 60. Specifically, the acceleration sensor 65 is provided on the control board 63. Strictly speaking, the acceleration sensor 65 is mounted on the control board 63 together with other electronic components. The acceleration sensor 65 is arranged, for example, at the middle part in the length direction (up - down direction) of the control board 63. The detection signal of the acceleration sensor 65 is input to the control board 63.

[0063] (2 - 8) Controller As Figure 4As shown, the refrigeration device 20 for a container includes a controller 70. The controller 70 controls the refrigeration device 20 for a container. The controller 70 includes the above-mentioned control board 63 and is arranged in the first space 61 inside the electronic component box 60. The controller 70 includes a microprocessor, an electrical circuit, and an electronic circuit. The microprocessor includes a CPU (Central Processing Unit), a memory, a communication interface, analog input / output, and contact input / output interfaces. The memory stores various programs executed by the CPU and the data used by the programs.

[0064] The controller 70 controls the switching of the on / off of the compressor 40 and the rotational speed of the motor of the compressor 40. The controller 70 controls the switching of the on / off of the outdoor fan 42 and the rotational speed of the motor of the outdoor fan 42. The controller 70 controls the switching of the on / off of the indoor fan 45 and the rotational speed of the motor of the indoor fan 45. The controller 70 controls the opening degree of the expansion valve 51. The controller 70 controls the opening and closing states of the first valve 58 and the second valve 59.

[0065] The controller 70 receives detection signals from a plurality of sensors. The plurality of sensors include a refrigerant temperature sensor, a refrigerant pressure sensor, and an air temperature sensor. The refrigerant temperature sensor includes a sensor for detecting the temperature of the refrigerant discharged from the compressor 40 and a sensor for detecting the temperature of the refrigerant sucked into the compressor 40. The refrigerant pressure sensor includes a sensor for detecting the high pressure of the refrigerant circuit 50 and a sensor for detecting the low pressure of the refrigerant circuit 50. The air temperature sensor includes a sensor for detecting the air temperature on the suction side of the indoor heat exchanger 44 and a sensor for detecting the air temperature on the blowing side of the indoor heat exchanger 44.

[0066] (2-9) Main power supply As Figure 4 As shown, the refrigeration device 20 for a container has a main power supply 71. The main power supply 71 is a power supply for operating the refrigeration device 20 for a container. It supplies power to each device of the refrigeration device 20 for a container. Specifically, the main power supply 71 supplies power to the compressor 40, the outdoor fan 42, and the indoor fan 45 through a power circuit. The main power supply 71 supplies power to the valves of the refrigerant circuit 50, which include the first valve 58 and the second valve 59. The main power supply 71 supplies power to the controller 70.

[0067] (3) Judgment device As Figure 4As shown, the controller 70 includes a determination device 80. The determination device 80 is used to estimate the degree of impact on the target component T of the container 10. The determination device 80 makes an abnormality determination for the target component T based on the estimated value of the impact degree. The determination device 80 includes a storage unit 81, a processing unit 82, a notification unit 83, and an auxiliary power supply 84.

[0068] (3 - 1) Storage unit The storage unit 81 includes a hard disk drive (HDD), a random access memory (RAM), a solid state drive (SSD), etc. The storage unit 81 stores data (first data) for estimating the degree of impact on the target component T. The first data is data related to the influence caused by the difference between the position of the acceleration sensor 65 and the position of the target component T.

[0069] Figure 5 An example of the first data is shown. The first data is a data table associating the target component T with a correction coefficient corresponding to the target component T. The storage unit 81 may not store Figure 5 the measured values described. In this example, the target component T is the electronic component box 60, the bottom plate 22c of the housing 21, the outdoor heat exchanger 41, the compressor 40, the outdoor fan 42, the valve, the indoor heat exchanger 44, the indoor fan 45, and the refrigerant pipe. The electronic component box 60 is arranged at the same position as the acceleration sensor 65. The target components T other than the electronic component box 60 are arranged at positions different from the acceleration sensor 65.

[0070] The valve is a valve provided in the refrigerant circuit 50 and includes an expansion valve 51, a first valve 58, and a second valve 59. The valve can be a four-way reversing valve, a check valve, a rotary valve, etc. The refrigerant pipe is a pipe for forming the refrigerant circuit. The refrigerant pipe includes an ejection pipe 52, a suction pipe 53, a liquid pipe 55, and a bypass pipe 57. The refrigerant pipe can also be an injection pipe connected to the middle of the compression of the compressor 40, a heating pipe arranged inside the water collection tray.

[0071] The first data of this embodiment is obtained in advance through experiments. In the experiment, when an impact is actually applied to the container 10, the degree (acceleration) of the impact acting on each target component T is measured. For example, when the acceleration of the electronic component box 60 is 25 [G] and the acceleration of the bottom plate 22c of the housing 21 is 45 [G], an acceleration 1.8 times that of the electronic component box 60 acts on the bottom plate 22c. In this case, assuming that the electronic component box 60 located at the same position as the acceleration sensor 65 is used as a reference and the correction factor of the electronic component box 60 is set to 1.0, the correction factor of the bottom plate 22c is 1.8. That is to say, the correction factor is the ratio of the measured value of the acceleration acting on each target component T to the measured value of the acceleration acting on the electronic component box 60.

[0072] The correction factor is used to reduce the error of the impact degree caused by the influence generated by the position difference between the acceleration sensor 65 and the target component T. Here, the influence generated by the position difference between the acceleration sensor 65 and the target component T specifically refers to the influence on the ease of impact transmission caused by factors such as the distance difference of the path from the acceleration sensor 65 to the target component T, the material difference of this path, and the difference in the fixing method of the acceleration sensor 65. The correction factor can be said to be an index considering these influences.

[0073] The correction factor obtained through such experiments is associated with the identification information of the target component T and stored in the storage unit 81.

[0074] The data related to the influence generated by the position difference between the acceleration sensor 65 and the target component T may not be a data table, but may be a function obtained through simulation or the like, or a learned model obtained through machine learning.

[0075] (3-2) Processing unit The processing unit 82 includes a microprocessor, an electrical circuit, and an electronic circuit. The microprocessor includes a CPU (Central Processing Unit), a memory, a communication interface, analog input / output, and a contact input / output interface. The memory stores various programs executed by the CPU and the data used by the programs. The processing unit 82 obtains the acceleration acting on the target component T as an estimated value based on the detection value of the acceleration sensor 65, that is, the acceleration, and the first data stored in the storage unit 81. Specifically, the processing unit 82 multiplies the acceleration detected by the acceleration sensor 65 by the correction factor of each target component T respectively, so as to obtain the acceleration of each target component T as an estimated value.

[0076] The processing unit 82 determines whether the target component T is in an abnormal state based on the estimated value of the impact degree of the target component T. If the estimated value of the target component T exceeds the first threshold value, the processing unit 82 determines that the target component T is in an abnormal state. The abnormal state referred to here means a state in which the target component T has undergone plastic damage due to a relatively large impact once. The first threshold value is obtained in advance through experiments or simulations. The first threshold value is stored in the storage unit 81. The first threshold value is a value independent of the type of the target component T, but it can also be multiple values that vary according to the type of the target component T.

[0077] If the number of times the estimated value of the target component T exceeds the second threshold value exceeds a specified number of times, the processing unit 82 determines that the target component T is in an abnormal state. The second threshold value is smaller than the first threshold value. The abnormal state referred to here means a state in which the target component T has undergone plastic damage due to multiple impacts. The second threshold value is obtained in advance through experiments or simulations. The second threshold value is stored in the storage unit 81. The second threshold value is a value independent of the type of the target component T, but it can also be multiple values that vary according to the type of the target component T.

[0078] The above-mentioned specified number of times is obtained in advance through experiments or simulations. The specified number of times is stored in the storage unit 81. The specified number of times is a value independent of the type of the target component T, but it can also be multiple values that vary according to the type of the target component T.

[0079] (3-3) Notification unit The notification unit 83 notifies the target person of the historical data related to the estimated value stored in the storage unit 81. The historical data includes the time-series data of the estimated value of the impact degree of each target component T and the information indicating that the target component T is in an abnormal state. The target persons include the users of the container 10, maintenance companies, service providers, distributors, management companies, etc. The notification unit 83 notifies the time-series data to the target person using, for example, text, graphics, charts, sounds, etc. The notification unit 83 includes a sending unit that outputs the time-series data to a specified terminal. The notification unit 83 also includes an alarm unit that notifies the target person that the target component T is in an abnormal state using, for example, text, graphics, symbols, icons, sounds, lights, etc.

[0080] (3-4) Auxiliary power supply The auxiliary power supply 84 is a power supply for operating the judgment device 80 when the main power supply 71 is in the off state. For example, when the refrigeration device 20 for containers is in the stopped state, the auxiliary power supply 84 functions as the power supply for the judgment device 80. It can also be when the refrigeration device for containers is in the operating state, the auxiliary power supply 84 functions as the power supply for the judgment device 80. It can also be when the refrigeration device for containers is in the operating state, the main power supply 71 functions as the power supply for the judgment device 80. The auxiliary power supply 84 is composed of, for example, dry batteries or storage batteries.

[0081] (4) Operating action The refrigeration device 20 for containers performs cooling operation and defrosting operation.

[0082] During the cooling operation, a refrigeration cycle is performed. In this refrigeration cycle, after the refrigerant compressed in the compressor 40 is condensed in the outdoor heat exchanger 41, it is decompressed by the expansion valve 51 and then evaporated in the indoor heat exchanger 44. The air flowing out from the indoor space 12 into the internal passage 31 is cooled in the indoor heat exchanger 44 that functions as an evaporator. The cooled air is sent to the indoor space 12.

[0083] During the defrosting operation, the refrigerant compressed in the compressor 40 flows through the bypass pipe 57 and then through the indoor heat exchanger 44. The heat of the refrigerant flowing inside the indoor heat exchanger 44 melts the frost on the surface of the indoor heat exchanger 44.

[0084] (5) Action of the judgment device Refer to Figure 6 the flowchart of to explain the action of the judgment device 80 in detail.

[0085] In step S11, the acceleration sensor 65 detects the acceleration as the degree of impact. The acceleration sensor 65 is provided inside the electronic component box 60. Therefore, the acceleration sensor 65 substantially detects the acceleration acting on the electronic component box 60.

[0086] In step S12, the storage unit 81 stores the detection value of the acceleration sensor 65. Each time the acceleration sensor 65 performs detection, the storage unit 81 stores the detection value. In step S13, the processing unit 82 calculates the estimated value of the acceleration of each target component T based on the detection value of the acceleration sensor 65 in step S11 and the first data stored in the storage unit 81. It should be noted that the detection value of the acceleration sensor 65 can also be read from the storage unit 81. The processing unit 82 multiplies the detection value of the acceleration by the correction coefficient of each target component T. Specifically, for example, when the detection value of the acceleration sensor 65 is 10 [G], the processing unit 82 multiplies this detection value 10 [G] by Figure 5The correction coefficient of the bottom plate 22c of the housing 21 is 1.8, and thus the estimated value of the bottom plate 22c (= 18 [G]) is obtained.

[0087] In step S14, the storage unit 81 stores the estimated value of each target component T obtained in step S13. Whenever the estimated value is obtained in step S13, the storage unit 81 stores the estimated value of each target component T.

[0088] In step S15, the processing unit 82 compares the estimated value obtained in step S13 with the first threshold value. In step S15, if the estimated value is equal to or greater than the first threshold value, the process proceeds to step S18. In step S18, the processing unit 82 determines that the target component T to be judged is in an abnormal state. For example, if the estimated value of the bottom plate 22c is equal to or greater than the first threshold value, the processing unit 82 determines that the bottom plate 22c is in an abnormal state.

[0089] If the processing unit 82 determines that the target component T is in an abnormal state, it outputs a first signal indicating that the target component T is in an abnormal state.

[0090] In step S19, the notification unit 83 notifies the person concerned of the information indicating that the target component T is in an abnormal state. When the first signal output by the processing unit 82 is input to the notification unit 83, the notification unit 83 notifies the person concerned of the information indicating that the target component T is in an abnormal state. This information includes the type of the target component T. Thus, the person concerned can quickly grasp that the target component T is in an abnormal state and can take some countermeasures.

[0091] In step S15, if the estimated value is less than the first threshold value, the process proceeds to step S16. In step S16, the processing unit 82 compares the estimated value with the second threshold value. If the estimated value is less than the second threshold value, the process returns to step S11. If the estimated value is equal to or greater than the second threshold value, the process proceeds to step S17.

[0092] In step S17, the processing unit 82 compares the number of times the estimated value exceeds the second threshold value with a specified number of times. Here, the number of times the estimated value exceeds the second threshold value is the cumulative number obtained by appropriately counting after the judgment device 80 starts to operate. It should be noted that the cumulative number can be judged based on the estimated value stored in the storage unit 81, or the count value of the cumulative number exceeding the second threshold value can be stored in the storage unit 81. In step S17, if the number of times the estimated value exceeds the second threshold value is less than the specified number of times, the process returns to step S11. If the number of times the estimated value exceeds the second threshold value is equal to or greater than the specified number of times, the process proceeds to step S18. In step S18, the processing unit 82 determines that the target component T is in an abnormal state, and in step S19, the notification unit 83 notifies the person concerned of this situation.

[0093] (6) Effects of the Embodiment In the embodiment, the storage unit 81 stores data related to the influence of the positional difference between the acceleration sensor 65 and the object component T on the detection value related to the impact degree, and the detection value related to the impact degree is detected by the acceleration sensor 65. The processing unit 82 obtains the degree of the impact acting on the object component T as a speculated value based on the detection value of the sensor 65 and the data stored in the storage unit 81.

[0094] It can be conceived that a physical quantity related to the degree of impact acting on an object component in a container is detected by a sensor, and the degree of impact acting on the object component is obtained based on the detection value of the sensor. However, when there is a difference in the positions of the sensor and the object component, due to the influence caused by the positional difference between the two, it is sometimes impossible to accurately obtain the degree of impact on the object component.

[0095] Specifically, the ease of impact transmission from the sensor to the object component changes, for example, according to the path length between the positions of the two and the fixing method of the sensor. Therefore, an error occurs between the degree of impact detected by the sensor and the degree of impact acting on the object component. There is a problem that when an error occurs due to the influence of the positional difference between such a sensor and the object component, the degree of impact acting on the object component cannot be obtained with high precision.

[0096] Through the control of this embodiment, when the object component T is arranged at a position different from that of the acceleration sensor 65 in the container, the degree of impact on the object component T can be speculated with a small error, where the error is caused by the influence of the positional difference. As a result, the degree of impact on the object component T can be speculated with high precision.

[0097] The number of multiple object components T is larger than the number of acceleration sensors 65. Therefore, it is possible to speculate the degree of impact on multiple object components T while reducing the number of acceleration sensors 65, thereby reducing the number of components. The number of acceleration sensors 65 is preferably one.

[0098] If the speculated value exceeds the first threshold, the processing unit 82 determines that the object component T is in an abnormal state. Thus, for example, when the container 10 lifted by a crane or the like drops and a relatively large impact acts on the container 10, it is possible to quickly determine that the object component T is in an abnormal state.

[0099] If the number of times the estimated value exceeds the second threshold exceeds the specified number of times, the processing unit 82 determines that the target component T is in an abnormal state. Thus, in the case where impacts smaller than the first threshold act on the target component T multiple times and the target component T undergoes plastic damage, it is possible to quickly determine that the target component T is in an abnormal state.

[0100] The processing unit 82 determines whether the target component T is in an abnormal state based on the estimated value stored in the storage unit 81. Thus, it is possible to accurately determine whether the target component T is in an abnormal state based on the accumulated past data.

[0101] In addition to the abnormal state, the notification unit 83 notifies the target person of the time series data related to the estimated value. The target person can know which impacts act on which target component T in the time series by confirming the time series data of the estimated value. Therefore, the target person can grasp the state of the container 10 based on this time series data, or evaluate how the container 10 is used in the transportation, loading and unloading, etc. of the container 10, or propose a better plan for how to use the container 10 in the future. The notification unit 83 may also notify the target person of the time series data related to the detection value of the acceleration sensor 65.

[0102] The acceleration sensor 65 is arranged inside the electronic component box 60. It is difficult for water, dew condensation water, seawater, etc. generated due to the influence of rainfall to enter the electronic component box 60. It is difficult for dust in the air, corrosive components in the air, etc. to enter the electronic component box 60. Therefore, the deterioration of the acceleration sensor 65 can be suppressed.

[0103] The acceleration sensor 65 is arranged on the control board 63. Thus, it is possible to supply power to the acceleration sensor 65 from the control board 63, or control the acceleration sensor 65 from the control board 63, or output the detection signal of the acceleration sensor 65 to the control board 63. As a result, the electrical wiring of the acceleration sensor 65 can be shortened or substantially omitted. Since it is possible to suppress noise from being superimposed on the detection signal of the acceleration sensor 65, it is possible to suppress the deterioration of the impact degree estimation accuracy due to the influence of noise.

[0104] In addition, since the control board 63 is made of a plate-shaped resin material, it is also possible to attenuate the impact acting on the acceleration sensor 65.

[0105] Since the determination device 80 has the auxiliary power supply 84, it is possible to continuously obtain the degree of the impact acting on the container 10 as an estimated value even when the container refrigeration device 20 is in a stopped state. Furthermore, the estimated value can be continuously stored in the storage unit 81 to obtain historical data.

[0106] The acceleration sensor 65 is a triaxial acceleration sensor. Therefore, in addition to being able to evaluate the impact in the vertical direction generated during the loading and unloading of the container 10, etc., it is also able to evaluate the impact in the front-rear direction or left-right direction generated during the transportation of the container 10. In particular, when the container 10 is mounted on a transportation vehicle such as a train or a vehicle, it is possible to evaluate the impact in the front-rear direction caused by braking and the impact in the left-right direction generated when turning on a curve.

[0107] (7) Variation The above-described embodiment may also adopt the structure of the following variation.

[0108] (7-1) Variation 1: Judgment of fatigue failure The processing unit 82 may also determine that the fatigue failure of the target component T is an abnormal state based on the estimated value of the target component T. The processing unit 82 determines that the fatigue failure of the target component T is an abnormal state based on the stress amplitude σ of the target component T and the number of cycles during which the stress amplitude σ acts.

[0109] The fatigue failure of the target component T can be determined using data (second data) related to the S-N curve graph (refer to Figure 7 ), which is obtained based on the relationship between the stress amplitude σ acting on the target component T and the number of fracture cycles N. The second data is obtained in advance through experiments for each target component T and stored in the storage unit 81. The number of fracture cycles N is the number of times required for the target component T to fracture when a certain stress amplitude σ is repeatedly applied to the target component T. The larger the stress amplitude σ, the fewer the number of fracture cycles N; the smaller the stress amplitude σ, the more the number of fracture cycles N.

[0110] Refer to Figure 8 The operation of the abnormality determination of Variation 1 will be described. In step S21, the acceleration sensor 65 detects the acceleration as the degree of impact.

[0111] In step S22, the storage unit 81 stores the detection value of the acceleration sensor 65. In step S22, each time the acceleration sensor 65 performs detection, the storage unit 81 stores the detection value.

[0112] In step S23, the processing unit 82 obtains the estimated value of the acceleration of each target component T based on the detection value of the acceleration sensor 65 and the second data stored in the storage unit 81. The details of the processing in step S23 are the same as those of the processing in step S13 described above.

[0113] In step S24, the storage unit 81 stores the estimated value of each target component T obtained in step S23. Each time the estimated value is obtained in step S23, the storage unit 81 stores the estimated value of each target component T.

[0114] In step S25, the processing unit 82 calculates the damage degree D of each target component T. The damage degree D can be expressed by the following formula.

[0115] Damage degree D = (n1 / N1) + (n2 / N2) …… + (ni / Ni), (i = 1, 2, 3) …… (1) Here, n1 represents the number of times the stress amplitude σ1 acts on the target component T, n2 represents the number of times the stress amplitude σ2 acts on the target component T, and ni represents the number of times the stress amplitude σi acts on the target component T. N1 represents the number of fracture cycles when the stress amplitude σ1 acts on the target component T, N2 represents the number of fracture cycles when the stress amplitude σ2 acts on the target component T, and Ni represents the number of fracture cycles when the stress amplitude σi acts on the target component T.

[0116] The stress amplitude σ of the target component T is related to the degree (acceleration) of the impact acting on the target component T. Therefore, by using a previously obtained correlation formula or the like, σ1, σ2, …… σi can be obtained based on the estimated value of the target component T. In addition, n1, n2, …… ni can be obtained based on the time series data of the estimated values stored in the storage unit 81. Based on the above, the processing unit 82 calculates the damage degree D of each target component T using the above formula (1).

[0117] In step S26, the processing unit 82 determines whether the damage degree D of the target component T is 1 or more. The processing unit 82 makes this determination for each target component T. If the damage degree D is less than 1 in step S26, the process returns to step S21. If the damage degree D is 1 or more in step S26, the process transfers to step S27.

[0118] In step S27, the processing unit 82 determines that the fatigue failure of the target component T to be judged is an abnormal state. For example, if, based on the estimated value of the refrigerant pipe, the damage degree D of the refrigerant pipe is 1 or more, the processing unit 82 determines that the situation where the refrigerant pipe has suffered fatigue failure is an abnormal state.

[0119] In step S28, the notification unit 83 notifies the person concerned that the target component T has suffered fatigue failure. The information output by the notification unit 83 includes the type of the target component T. Thus, the person concerned can quickly grasp the situation that the target component T has suffered fatigue failure or has a high possibility of suffering fatigue failure, and can thus take some countermeasures.

[0120] (7 - 2) Variant 2: Variant of the first data In the first data of the above-described embodiment, the correction coefficient of the target component T uses an inherent value regardless of the magnitude of the impact degree (acceleration). However, the storage unit 81 may also store correction coefficients that vary depending on the impact degree (acceleration). In this case, the processing unit 82 uses the detection value of the sensor 65 and the correction coefficient corresponding to the acceleration value of the detection value to obtain the impact degree of the target component T as an estimated value.

[0121] (7-3) Variation 3: Variation of the target component The target component T in the above-described embodiment is the electronic component box 60, the bottom plate 22c of the housing 21, the outdoor heat exchanger 41, the compressor 40, the outdoor fan 42, the valve, the indoor heat exchanger 44, the indoor fan 45, and the refrigerant pipe. The target component T may also be other constituent components.

[0122] For example, the target component T may also be the container main body 11. If an impact acts on the container main body 11, it may damage the heat insulation and airtightness of the container main body 11. By obtaining the degree of the impact acting on the container main body 11 as an estimated value, it is possible to determine the deterioration of the heat insulation or airtightness of the container main body 11 as an abnormal state.

[0123] The target component T may also be the accumulator 54, the receiver 56, the flat plate portion 22a of the housing 21, the concave portion 22b of the housing 21, the partition plate 23, the ventilator 25, or the inspection window 24. The target component T may also be a plate heat exchanger as other heat exchangers, a heater for defrosting, etc. The target component T may also be a four-way reversing valve, a three-way valve, a rotary valve, or a check valve as other valves. The target component T may also be a water collection tray and a drain pipe for discharging the water accumulated in the water collection tray.

[0124] The target component T may also be a support body that supports the above-described respective constituent components.

[0125] The target component T may also be a constituent component of the air conditioning device. The air conditioning device is provided in the container refrigeration device 20 and adjusts the composition of the air in the box interior space 12. The air conditioning device has constituent components such as an adsorption cylinder, a gas separation membrane, a pump, and an air pipe.

[0126] The target component T may also be one. In this case, one target component T is arranged at a position different from the sensor 65.

[0127] (7-4) Variation 4: Variation of the sensor The acceleration sensor 65 may also be a uniaxial acceleration sensor. In this case, the acceleration sensor 65 particularly preferably detects the acceleration in the Z-axis (vertical direction).

[0128] The acceleration sensor 65 can also be a six-axis acceleration sensor. In this case, in addition to being able to detect the acceleration in the X-axis, Y-axis, and Z-axis, the acceleration sensor 65 can also detect the acceleration in the rotational direction centered on these three axes. In particular, when the container 10 is installed on a vehicle, it is preferable to use a six-axis acceleration sensor 65.

[0129] The sensor for detecting the degree of impact can be a contact-type vibration sensor such as a variable-frequency type, piezoelectric type, electrodynamic type, or servo type, or a non-contact-type vibration sensor such as an eddy current type, electrostatic capacitance type, or optical type.

[0130] The sensor for detecting the degree of impact may not be a sensor for detecting acceleration, but a sensor for detecting the displacement amount of speed or the position of the sensor.

[0131] The sensor 65 for detecting the degree of impact can be a GPS receiver. By using the GPS receiver, the change amount of the position of the GPS receiver at each fixed time can be obtained. Based on this change amount and time, the acceleration of the GPS receiver is calculated, and thus the degree of impact can be detected.

[0132] (7-5) Variant Example 5: Arrangement of Sensors As Figure 9 shown, the sensor 65 can also be arranged on the communication device 62. Specifically, the sensor 65 is fixed on the front surface of the communication device 62 in the first space 61 inside the electronic component box 60.

[0133] The sensor 65 can also be arranged outside the electronic component box 60. For example, the sensor 65 can also be arranged on the compressor 40, the motor of the external fan 42, etc.

[0134] (7-6) Variant Example 6: Application Location of the Judgment Device The judgment device 80 in the above-described embodiment is arranged in the controller 70 of the refrigeration device 20 for containers. However, the judgment device 80 can also be configured separately from the controller 70. The judgment device 80 can also be an additional unit that has the sensor 65, the storage unit 81, and the processing unit 82 and can be attached to the refrigeration device 20 for containers. The additional unit preferably also has a notification unit 83 and an auxiliary power supply 84.

[0135] The judgment device 80 can be arranged in a server device on a network or in a communication terminal such as a smart phone. The judgment device 80 is configured such that the detection signal of the sensor 65 can be input into the judgment device 80 by wire or wirelessly. The judgment device 80 is configured to be able to output the historical data stored in the storage unit 81 and the judgment result of the abnormal state to a specified terminal, display device, etc.

[0136] The determination device 80 can be provided in the container 10 that does not have the refrigeration device 20 for containers. The container 10 has a container main body 11 and an opening / closing door that closes the opening 13 of the container main body 11. The sensor 65 is provided on the container main body 11 or the opening / closing door. The determination device 80 estimates the degree of impact acting on the target component T, which is located at a position different from the sensor 65.

[0137] (7-7) Variant Example 7 Variant Example 7 is a determination system 90 including a server device 91 having a storage unit 81 and a controller 70 having a processing unit 82.

[0138] As Figure 10 shown, the refrigeration device 20 for containers has a communication device 62 and a controller 70 as a processing device. The controller 70 has a processing unit 82, a notification unit 83, and an auxiliary power supply 84. The controller 70 is connected to the server device 91 via the communication device 62 and the network N.

[0139] As Figure 11 shown, the server device 91 has a CPU 92, a storage unit 81, an auxiliary storage device 93, an I / F device 94, a server-side communication device 95, and a drive device 96 as hardware elements.

[0140] The CPU 92 (Central Processing Unit) is an arithmetic device that executes various programs. The storage unit 81 is a storage device that stores programs, data, etc. required for the CPU to execute. The storage unit 81 includes a hard disk drive (HDD), a random access memory (RAM), a solid state drive (SSD), etc. The auxiliary storage device 93 is an auxiliary storage device that stores various programs and information used when executing various programs. The I / F device 94 is a device for connecting to an external machine, communicating with the external machine, and controlling the external machine. In this example, the operation device 111 and the display device 112 are connected to the server device 91 via the I / F device 94. The operation device 111 is an operation device for accepting various operations, and the display device 112 is a display device for displaying various information. The server-side communication device 95 is a communication device for communicating between the server device 91 and an external machine. The drive device 96 is a device for reading data from the recording medium 113. The recording medium 113 includes a compact disc read-only memory (CD-ROM), a magneto-optical disc, a read-only memory (ROM), a flash memory, an SSD, etc.

[0141] Similar to the above-described embodiment, the storage unit 81 stores first data for estimating the degree of impact on the target component T. The server-side communication device 95 is connected to the communication terminal of the target person. The server-side communication device 95 is a server-side notification unit that notifies the target person of the historical data of the server device 91. The historical data includes the detection value of the acceleration sensor 65, the time-series data of the estimated value of the degree of impact on each target component T, and information indicating that the target component T is in an abnormal state.

[0142] Refer to Figure 12 the timing chart of Figure 13 and the flowchart of

[0143] In Figure 12 step S31, the acceleration sensor 65 detects the acceleration as the degree of impact. In step S32, the acceleration sensor 65 sends the detection value to the controller 70. In step S33, the controller 70 sends a signal indicating a transmission request for the first data to the communication device 62. In step S34, the communication device 62 sends a signal indicating a transmission request for the first data to the server device 91 via the network N.

[0144] In step S35, the server device 91 reads out the first data from the storage unit 81. Similar to the above-described embodiment, the first data is data obtained by associating the target component T with the correction coefficient corresponding to the target component T. In step S36, the server device 91 sends the first data to the communication device 62 via the network N. In step S37, the communication device 62 sends the received first data to the controller 70. In this way, the server device 91 sends the first data to the controller 70 via the communication device 62 according to the transmission request from the controller 70.

[0145] In step S50, the processing unit 82 of the controller 70 performs the same determination process as in the above-described embodiment (hereinafter referred to as the state determination process).

[0146] In Figure 13 the state determination process shown, in step S51, the processing unit 82 obtains the estimated value of the acceleration of each target component T based on the detection value of the acceleration sensor 65 in step S31 and the first data stored in the storage unit 81. In other words, the processing unit 82 obtains the estimated value of the acceleration of each target component T based on the detection value of the acceleration sensor 65 in step S31 and the first data sent from the server device 91. Specifically, the processing unit 82 obtains the estimated value by multiplying the detection value of the acceleration by the correction coefficient of each target component T.

[0147] Next, in step S52, the processing unit 82 compares the estimated value obtained in step S51 with the first threshold value. In step S52, if the estimated value is equal to or greater than the first threshold value, the process proceeds to step S53. In step S53, the processing unit 82 determines that the target component T to be judged is in an abnormal state.

[0148] In step S52, if the estimated value is less than the first threshold value, the process proceeds to step S54. In step S54, the processing unit 82 compares the estimated value with the second threshold value. If the estimated value is equal to or greater than the second threshold value, the process proceeds to step S55.

[0149] In step S55, the processing unit 82 compares the number of times the estimated value exceeds the second threshold value with a specified number of times. If the number of times the estimated value exceeds the second threshold value is equal to or greater than the specified number of times, the process proceeds to step S53. In step S53, the processing unit 82 determines that the target component T to be judged is in an abnormal state.

[0150] As Figure 12 shown, after the state determination process in step S50, the controller 70 sends the state determination data to the communication device 62 in step S38. In step S39, the communication device 62 sends the received state determination data to the server device 91 via the network N. Here, the state determination data includes the detection value detected by the acceleration sensor 65, the estimated value obtained by the processing unit 82, and the determination result of the abnormal state of the target component T. In step S40, the storage unit 81 of the server device 91 stores the state determination data as historical data. Thus, the detection value, the estimated value, and the determination result of the abnormal state can be stored as historical data in the storage unit 81 of the server device 91.

[0151] In step S41, when it is determined that the state is abnormal in the state determination process in step S50, the server-side communication device 95 of the server device 91 notifies the target person of the information indicating that the target component T is in an abnormal state. Specifically, the server-side communication device 95 sends the data indicating the abnormal state to the communication terminal owned by the target person. Thus, the target person can quickly grasp that the target component T is in an abnormal state and can take some countermeasures.

[0152] After the state determination process in step S50, the controller 70 executes the process in step S43. In step S43, if it is determined that the state is abnormal in the state determination process, then in step S44, the notification unit 83 of the controller 70 notifies the target person of the information indicating that the target component T is in an abnormal state. Thus, the target person can quickly grasp that the target component T is in an abnormal state and can take some countermeasures.

[0153] In Modification 7, when it is determined that the target component T is in an abnormal state, it is also possible that only one of the notification unit 83 of the controller 70 and the server-side communication device 95 notifies the target person that the target component is in an abnormal state.

[0154] In steps S33 and S34 of Modification 7, the timing of the transmission request for the first data may be the moment when the acceleration sensor 65 receives the detection value, or other specified moments. Other specified moments are, for example, the moment when the container 10 is on land. This is because when the container 10 is on land, the target person who receives the notification can immediately perform inspections, repairs, and selection of the container 10.

[0155] Regarding whether the container 10 is on land, it can be determined by the GPS sensor's determination of the position information, the input by the target person, or whether the communication terminal owned by the target person can communicate.

[0156] The structure of Modification 7 described above can be applied to all of the above Modifications 1 to 6. For example, in the determination system 90 of Modification 7, when performing the determination process of Modification 1, the storage unit 81 of the server device 91 stores the first data and the second data. The controller 70 sends a transmission request to the server device 91 via the communication device 62. The transmission request requests the server device 91 to send the first data and the second data stored in the storage unit 81. The server device 91 sends the first data and the second data stored in the storage unit 81 to the controller 70 via the communication device 62 according to the transmission request. Similar to Figure 8 the processing, the controller 70 determines the fatigue failure of the target component T based on the detection value of the acceleration sensor 65, the first data, and the second data.

[0157] (8) Judgment Method and Program The judgment method of the present disclosure includes a storage step and a speculation step. In the storage step, data related to the influence of the position difference between the sensor 65 and the target component T on the detection value related to the impact degree is stored. The detection value related to the impact degree is detected by the sensor 65 arranged at the container 10 having the target component T. In the speculation step, based on the detection value of the sensor 65 and the data stored in the storage step, the degree of the impact acting on the target component T is obtained as a speculation value. Here, the judgment method may include Figure 6 、 Figure 8 、 Figure 12 and Figure 13 any of the steps shown.

[0158] The program of the present disclosure causes a computer to execute a storage step and a speculation step. In the storage step, data related to the influence of the position difference between the sensor 65 and the object component T on the detection value related to the impact degree is stored. The detection value related to the impact degree is detected by the sensor 65 arranged at the container 10 having the object component T. In the speculation step, based on the detection value of the sensor 65 and the data stored in the storage step, the degree of the impact acting on the object component T is obtained as a speculation value. Here, the program may also cause the computer to execute Figure 6 , Figure 8 , Figure 12 and Figure 13 any of the steps shown. The program may be stored only in any one of the above-mentioned controller 70, communication terminal, server device, and storage medium, or may be separately stored in two or more of them.

[0159] (9) Reference method If the detection value of the sensor 65 exceeds the first threshold value, the processing unit 82 of the determination device 80 of the reference method determines that the object component T is in an abnormal state.

[0160] If the number of times the detection value of the sensor 65 exceeds the second threshold value exceeds the specified number of times, the processing unit 82 of the determination device 80 of the reference method determines that the object component T is in an abnormal state.

[0161] The processing unit 82 of the determination device 80 of the reference method determines the fatigue failure of the object component T as an abnormal state based on the detection value of the sensor 65. Specifically, the processing unit 82 determines the fatigue failure of the object component T as an abnormal state based on the stress amplitude σ of the object component T obtained from the detection value of the sensor 65 and the number of cycles to which the stress amplitude σ is applied.

[0162] The detailed operations of the determination device 80 in these reference methods are the same as those in the above-described embodiments and various modification examples.

[0163] The above has described the embodiments and modification examples, but it should be understood that various changes can be made to their forms and specific situations without departing from the gist and scope of the claims. As long as the functions of the objects of the present disclosure are not affected, the above-described embodiments, modification examples, and other embodiments can also be appropriately combined or replaced.

[0164] The words "first", "second", "third",... described above are only used to distinguish the statements containing these words, and do not limit the number and order of these statements. -Industrial applicability-

[0165] In summary, the present disclosure is very useful for the determination device. -Symbol description-

[0166] 10 Container 11 Container main body 20 Refrigeration device for container 21 Housing 22 Housing main body 40 Compressor 41 Outdoor heat exchanger (heat exchanger) 42 Outdoor fan (fan) 44 Indoor heat exchanger (heat exchanger) 45 Indoor fan (fan) 51 Expansion valve (valve) 52 Spray pipe (refrigerant pipe) 53 Suction pipe (refrigerant pipe) 55 Liquid pipe (refrigerant pipe) 57 Bypass pipe (refrigerant pipe) 58 First valve (valve) 59 Second valve (valve) 60 Electronic component box 62 Communication device 63 Control board 65 Acceleration sensor (sensor) 70 Controller (processing device) 80 Judgment device 81 Storage unit 82 Processing unit 83 Notification unit 91 Server device T Object part

Claims

1. A judging device, characterized in that: The judging device includes a storage unit (81) and a processing unit (82), The storage unit (81) stores data related to the influence of the positional difference between the sensor (65) and the object component (T) on the detection value related to the impact degree, and the detection value related to the impact degree is detected by the sensor (65) arranged at the container (10) having the object component (T), The processing unit (82) obtains the degree of the impact acting on the object component (T) as a speculated value according to the detection value of the sensor (65) and the data stored in the storage unit (81).

2. The judging device according to claim 1, characterized in that: If the speculated value exceeds the first threshold value, the processing unit (82) judges that the object component (T) is in an abnormal state.

3. The judging device according to claim 1 or 2, characterized in that: If the number of times the speculated value exceeds the second threshold value exceeds the specified number of times, the processing unit (82) judges that the object component (T) is in an abnormal state.

4. The judging device according to any one of claims 1 to 3, characterized in that: The storage unit (81) stores the speculated value, The processing unit (82) judges whether the object component (T) is in an abnormal state according to the speculated value stored in the storage unit (81).

5. The judging device according to claim 4, characterized in that: The processing unit (82) judges the fatigue failure of the object component (T) as an abnormal state according to the speculated value.

6. The judging device according to any one of claims 1 to 5, characterized in that: The judging device includes a notification unit (83), and the notification unit (83) notifies the object person of the historical data related to the speculated value.

7. A refrigeration device for a container, characterized in that: The refrigeration device for a container includes the object component (T), the sensor (65) and the judging device (80) according to any one of claims 1 to 6, The refrigeration device for a container cools the interior of the container main body (11) of the container (10).

8. The refrigeration device for a container according to claim 7, characterized in that: The refrigeration device for a container includes an electronic component box (60) for accommodating electronic components (63), The sensor (65) is arranged inside the electronic component box (60).

9. The refrigeration device for a container according to claim 8, characterized in that: The electronic component includes a control board (63), The sensor (65) is arranged on the control board (63).

10. The refrigeration device for a container according to claim 7, characterized in that: The refrigeration device for a container includes a communication device (62) for communicating with other devices, The sensor (65) is provided on the communication device (62).

11. The refrigeration device for a container according to any one of claims 7 to 10, characterized in that: The object component (T) is at least one of a housing (21) of the refrigeration device (20) for a container, an electronic component box (60), a compressor (40), heat exchangers (41, 44), fans (42, 45), refrigerant pipes (52, 53, 55, 57), valves (51, 58, 59), and a housing main body (22).

12. A container, characterized in that: The container includes the object component (T), the sensor (65), and the determination device (80) according to any one of claims 1 to 6.

13. A determination system, characterized in that: The determination system includes a server device (91) having a storage unit (81) and a processing device (70) having a processing unit (82), The storage unit (81) stores data related to the influence of the positional difference between the sensor (65) and the object component (T) on the detection value related to the impact degree, and the detection value related to the impact degree is detected by the sensor (65) arranged at the container (10) having the object component (T), The processing unit (82) obtains the degree of impact acting on the object component (T) as a speculated value based on the detection value of the sensor (65) and the data stored in the storage unit (81).

14. The determination system according to claim 13, characterized in that: The processing device (70) sends a transmission request for requesting the server device (91) to send the data stored in the storage unit (81) to the server device (91) via a communication device (62), The server device (91) sends the data stored in the storage unit (81) to the processing device (70) via the communication device (62) according to the transmission request.

15. A determination method, characterized in that: The determination method includes a storage step and a speculation step, In the storage step, data related to the influence of the positional difference between the sensor (65) and the object component (T) on the detection value related to the impact degree is stored, and the detection value related to the impact degree is detected by the sensor (65) arranged at the container (10) having the object component (T), In the speculation step, the degree of impact acting on the object component (T) is obtained as a speculated value based on the detection value of the sensor (65) and the data stored in the storage step.

16. A program, characterized in that: The program causes a computer to execute the storage step and the speculation step, In the storage step, data related to the influence of the positional difference between the sensor (65) and the object component (T) on the detection value related to the impact degree is stored, and the detection value related to the impact degree is detected by the sensor (65) arranged at the container (10) having the object component (T), In the estimation step, an estimated value of the degree of impact acting on the target component (T) is obtained based on the detection value of the sensor (65) and the data stored in the storage step.

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