JP3407794B2 - Temperature recording device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature recording device for recording the temperature of a freezer compartment of a transportation vehicle and for alarming the occurrence of temperature abnormality.

[0002]

2. Description of the Related Art In recent years, a wide variety of materials have been frozen and transported, including transportation of foods. It is no exaggeration to say that the key to such frozen transportation is the frozen food. With respect to temperature control of rooms and the like, more precise control is required.

Further, in recent years, in the transportation vehicle with a freezer, the temperature of the freezer is effectively controlled with a small amount of fuel and energy consumption by accurately controlling the temperature of the freezer in order to reduce the operating cost and environmental protection. The demand for technology that realizes is becoming stronger. And in order to realize such accurate and effective temperature control of the freezer, the temperature control of the freezer is controlled not only from the viewpoint of the temperature control of the freezer but also the operation state of the transportation vehicle itself. The need for analysis is increasing further. That is, it is strongly required to perform more detailed temperature analysis in addition to the temperature data as well as data on the operating state of the vehicle itself (for example, operating mode information such as loading or unloading state or running state).

Therefore, in a conventional temperature recording device, temperature data of a temperature control target such as a freezer of a transportation vehicle is measured and recorded, and further, on a screen of a display device such as a liquid crystal display panel mounted on the vehicle. In addition, it was displayed as a graph like a temperature-time graph.

On the other hand, like an IC card in which various data such as temperature data for 24 hours to several days, running speed of the vehicle itself, and operation status such as engine ON / OFF are recorded. The recording medium is removed from the transportation vehicle, the IC card is attached to a temperature recording analysis device dedicated to temperature management analysis installed in the transportation company headquarters outside the vehicle, and the various data recorded therein is recorded. By reading out, the operation record of the transportation vehicle itself and the record of the temperature condition in the freezer which it carried were compared as data, and the analysis of the temperature control and operation control was performed.

[0006]

By the way, in general, the temperature recording apparatus is not limited to the purpose of analyzing the record of the temperature condition in the freezer which is carried by the vehicle after the operation, but also the operation of the vehicle. The temperature status of the freezer during transportation is monitored in real time at the time of the shipment, and if the temperature in the freezer becomes an abnormal value, it is immediately detected and countermeasures against it are taken. It is also used as one of the extremely important purposes to prevent the occurrence of problems.

For example, when an abnormal temperature rise occurs during the transportation of frozen fresh food, resulting in inadvertent thawing of the frozen fresh food, the frozen fresh food as the cargo is immediately loaded. It deteriorates and its quality is greatly impaired,
It will also cause great damage to such cargo.

In particular, when loading or unloading luggage such as frozen perishables into or from the luggage compartment, such loading or unloading is impossible unless the door of the luggage compartment is necessarily opened. The door of the luggage compartment must be opened during such loading and unloading. However, when the door of the luggage compartment is opened in this way, it is greatly affected by the inflow of outside air from the opened door and the loss of air inside the luggage compartment, and the interior of the luggage compartment such as the freezer that was kept at the set temperature until then. The temperature of changes drastically and deviates greatly from the set temperature.

In order to minimize the phenomenon of deviation from the set temperature when the door of the luggage compartment is opened, loading and unloading of cargo in the physical sense should be carried out as quickly as possible. However, a large door opening of the luggage compartment is required to quickly load and unload such luggage. Then, when such a large opening is opened next time, the temperature inside the luggage compartment will be appropriate within a short time because the atmosphere of suitable temperature inside the luggage compartment will be washed away from the large opening and will mix with the outside air. It will be out of the set temperature.

[0010] However, here is also proposed a method for enabling the time for the temperature of the luggage compartment to deviate from the proper set temperature as described above in a short time so as not to cause the above practical inconvenience. Will be issued. The temperature inside the cargo compartment that deviates from the preset temperature range when loading / unloading the cargo compartment door as described above is quickly returned to the original preset temperature range by a refrigeration system with sufficient output. It is a method to let.

However, in order to reduce the fuel consumption of refrigeration systems and the like, it is required to suppress the output of such refrigeration systems to the necessary and sufficient level, and the setting itself of the output of such refrigeration systems. Since there are many cases where the conditions can be changed, unless the settings that satisfy those conditions are adopted, the deviation of the luggage compartment temperature at the time of opening and closing the door as described above will not be resolved forever. As a result, there is a problem that the above-mentioned cargo such as frozen perishables is immediately deteriorated, and even worse, its quality may be greatly deteriorated to cause damage.

Alternatively, even if the output of the refrigerating apparatus is always set to a sufficient output value, a sufficient refrigerating effect can be obtained, for example, when the refrigerating apparatus is mechanically or electrically defective. Because of this, the temperature in the luggage compartment cannot be quickly returned to the normal set temperature range due to this. As a result, there is a problem that the baggage such as the above-mentioned frozen perishable matter is deteriorated and causes serious damage such as quality deterioration.

For example, in the case of the above-mentioned frozen perishables, the temperature of the frozen perishables suddenly rises and the frozen perishables are inadvertently thawed, causing deterioration of the frozen perishables. However, it may not be useful as a product. Therefore, in order to prevent the load from being hindered due to such changes in the temperature of the luggage compartment when opening and closing the door of the luggage compartment, the temperature of the luggage compartment is monitored by a temperature recorder, and based on the measured temperature value. It is proposed to attach an alarm device that detects the occurrence of a temperature abnormality and issues an alarm to warn of this.

That is, an appropriate temperature range is set in advance,
As described above, a device having a function of measuring the temperature of the luggage compartment at regular intervals and issuing an alarm when the measured temperature deviates from the appropriate temperature range is preferable. Devised as a thing. As a method of generating the alarm, it is generally required that the driver of the vehicle be perceived while the vehicle is in operation. It is effective to issue the alarm with information.

However, after the loading / unloading as described above is completed and the luggage compartment door is closed, the load which has deviated until a certain amount of time, no matter how the high output refrigerating apparatus is used. It takes time to return the room temperature to the set temperature again. Therefore, during the time required to restore the deviating cargo room temperature to the set temperature, the temperature of the cargo room remains outside the preset preset temperature range. It is inevitable that there is.

Therefore, after loading or unloading is finished and the door of the luggage compartment is closed, the above-mentioned alarm device judges that the above-mentioned temporary abnormal temperature condition is abnormal and issues an alarm. Such an alarm is almost meaningless, but rather an alarm sound that is only troublesome for the driver of the vehicle. In other words, it seems that the driver has just opened and closed the door, so the temperature inside the cargo compartment is only temporarily changing to the extent that there is practically no problem, but the alarm device falsely detects this and issues an alarm. When a sound is emitted, the alarm sound makes the driver feel anxious and extremely troublesome because the alarm sound is too natural and unexpected for the driver.

On the other hand, on the other hand, the above-mentioned alarm sound is intended to warn the driver of a temperature abnormality which is a serious cause of deterioration of quality and damage of packages such as fresh food, so that the driver should be surely warned. It must be something that encourages.
Therefore, the warning sound needs to be clearly and remarkably recognized by the driver. For this reason, if the alarm sound is emitted even during the temperature recovery time as described above, it is virtually meaningless for the driver, even though it is a virtually meaningless alarm. There is a problem in that it becomes noticeable and becomes even more complicated because it is a meaningless and careless alarm.

Furthermore, as described above, when an alarm is issued for the inevitable temporary (transient) deviation of the cargo room temperature from the normal value during the temperature recovery time, the alarm sound is complicated. In order to avoid this, it may be considered that an operation switch or the like for stopping the alarm generation is provided and the driver performs an operation for turning off the alarm.

In this case, however, the driver may be distracted by the impatience of hearing an unexpected alarm while driving the vehicle and the complexity of the subsequent switch operation. Due to the above, it is possible that the attention to the vehicle driving at that time is distracted and a driving error is induced. That is, there is a problem that it may even induce a meaningless driving error due to a completely meaningless alarm.

Alternatively, in order to avoid the complexity caused by the generation of an alarm sound when the abnormal temperature of the luggage compartment occurs immediately after the door is opened and closed and the complexity of the operation of stopping the alarm sound as described above, It is also conceivable to present an alarm of abnormal temperature occurrence in the luggage compartment as visual information by a visual medium such as a liquid crystal display panel, instead of presenting as an audible information by an audible medium called an audible alarm. Alternatively, since the conventional temperature recording device records the temperature of the luggage compartment on recording paper or the like, it is conceivable that the driver should be provided with the visual information by such a visual medium.

However, since all the visual information by such visual media must be visually confirmed by the driver, as described above, in order to accurately check the temperature abnormality of the cargo, which is of high importance, The driver has to frequently check the information on the luggage compartment temperature that is visually displayed while driving the vehicle, and the probability of inducing sideways driving and inattention to the front is extremely high, which is complicated for the driver. Not only that, there is a problem that it is dangerous in terms of vehicle operation, and conversely, if the number of times that such visual information is used to check the alarm is reduced, the probability of overlooking the temperature abnormality increases, so It is preferable that the sound is emitted as sound, that is, auditory information, and it is considered that the problems such as the complexity described above are not easy to solve.

The present invention has been made to solve the above problems, and in a temperature recording device used for transporting cargo such as a refrigerating vehicle, a refrigerating vehicle, or the like,
It is a temperature recording device that outputs an alarm as auditory information such as an alarm buzzer that does not require visual confirmation when a temperature abnormality occurs, and indicates that there is no temperature abnormality within the time required from immediately after opening and closing the luggage compartment door to returning to the set temperature. It is possible to solve the problems such as the complexity caused by the generation of a meaningful alarm and the complexity of its stop operation, and the cargo room temperature does not return to an appropriate set temperature after the opening and closing of the cargo room doors. It is an object to provide a temperature recording device capable of reliably issuing an alarm only when the possibility of causing a loss of quality becomes high, that is, when the alarm is really needed. .

[0023]

First, a temperature recording apparatus according to the present invention is a temperature recording apparatus mounted on a vehicle in which luggage is loaded in a luggage compartment whose temperature is controlled. In a temperature recording device having temperature measuring means for measuring the temperature of the temperature sensor at fixed time intervals, and temperature recording means for recording the temperature data in association with time data when the temperature is measured, Data of the temperature inside the luggage compartment measured by the temperature measuring means is compared with a preset value within a proper range corresponding to the load to determine whether the value is within the proper range or not. Temperature abnormality determining means, a luggage compartment door opening / closing detecting means for detecting opening / closing of a luggage compartment door provided at a luggage entrance / exit of the luggage compartment, and the luggage compartment door opening / closing detection means opening the luggage compartment door from a closed state. it is detected that the state From the point, the counting of a predetermined temperature recovery scheduled time is started, the count is continued until the count reaches the temperature recovery scheduled time, and the count reaches the temperature recovery scheduled time. After that, when the temperature abnormality determining means determines that the temperature recovery scheduled time counting means returns to the next waiting for detection of the luggage compartment door opening and closing, and the temperature data is out of the appropriate range, the auditory medium Alarm generating means for generating an alarm as auditory information using, when the temperature recovery scheduled time counting means is continuing the counting when it is determined that the temperature is an abnormal value, If the alarm is not generated or suppressed, and the temperature recovery scheduled time counting means does not continue the counting when it is determined that the temperature is an abnormal value It is provided with an alarm generating means for generating the alarm, when the temperature recovery plan
The interval counting means is further provided with the predetermined temperature recovery.
As the scheduled time, the luggage is in a room whose temperature is outside the appropriate range.
Time within the range that does not deteriorate the quality even when exposed to the internal atmosphere
It is characterized by being set to .

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035]

[0036] That is, at a temperature recorder of the first description, the step of cargo room temperature can open the luggage compartment door enters under conditions deviating from the proper range, counting the temperature recovery expected time of the. In other words, the time during which the alarm based on auditory information is not (suppressed) or suppressed is the time during which the luggage compartment door is opened and the loading and unloading work is included. Since it can be counted as the time above, the alarm stop (or suppression) after taking into consideration the problem of the quality deterioration of the package exposed to the temperature atmosphere outside the proper range in the time during such loading and unloading work. ) And alarm display can be performed.

Further, when the temperature recovery scheduled time is counted from the stage in which the cargo room door is opened in this way and the condition where the cargo room temperature deviates from the proper range is entered, the temperature recovery scheduled time at that time is counted. Particularly, paying attention to the deterioration of the quality of the cargo, it is desirable to set the time within the range in which the quality of the cargo does not deteriorate even if it is exposed to the temperature atmosphere outside the proper range.

[0038]

[0039] Second, temperature recording device of the present invention, the first
1. In the temperature recording apparatus according to 1 , the temperature recovery scheduled time counting means further changes the cargo compartment door from the open state to the closed state after the counting is once started and before the counting is finished. Even if it opens again,
Without starting the new count from the open state, a temperature recording device, characterized in that counting continues until the end without resetting the count ongoing previously the open state.

That is, in the case where the luggage compartment door is opened again to load and unload the load before the scheduled temperature recovery time once the counting is started completely, the load and unload load of the load is reloaded again. If the temperature reset scheduled time starts counting from the initial value again when the room door is opened (that is, the count that was continuing before that time is reset), the load loaded in the cargo room will end up. Is exposed to a temperature outside the proper range, it will be counted substantially longer than the expected temperature recovery time, and the counting will end and an alarm can be issued. By then, there is a possibility that the baggage has already suffered quality deterioration due to abnormal temperature.

Therefore, according to the present invention, in the case where loads are frequently loaded and unloaded in the short time as described above, and the luggage compartment door is opened and closed many times, those continuous frequent loadings are performed. Completely counting without resetting from the start of the first work of loading and unloading of various loads until the above-mentioned scheduled temperature recovery time is completely completed. More specifically, the detection of the start time of the loading / unloading work of the luggage can be performed by detecting the open state of the luggage compartment door. As a result, it is possible to avoid the inconvenience of delaying the alarm issuable time (or prolonging the alarm stop time) due to the continuous and frequent loading and unloading work of cargo as described above.

Thirdly, in the above-mentioned temperature recording device of the first or second aspect, wherein the warning generating means, wherein when the temperature returns estimated time counting means is continuing the count, the aural information the alarm It is characterized in that it is an alarm generating means that is displayed as visual information.

In other words, the alarm generating means according to the present invention does not give a trouble such as an alarm sound to the driver even if a temperature abnormality is detected during the temperature recovery scheduled time as mentioned above (or. However, in addition to this, the alarm at that time may be displayed on the liquid crystal display panel, for example, as visual information that is conspicuous to the driver instead of complicated auditory information for the driver. Even in this case, needless to say, when an abnormal temperature is detected at a time other than the scheduled temperature recovery time, the same auditory information as above is used to issue the alarm.

In this way, when it is detected that a temperature abnormality has occurred, even if it is a temperature abnormality during the scheduled temperature recovery time, it can be dealt with appropriately to the degree of importance. As is perceived by the sense, the alarm is issued not by the above-mentioned alarm sound but by a visual method of displaying an alarm, so that the temperature abnormality can be alarmed while avoiding the complexity of the alarm itself.

[0045]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a temperature recording apparatus according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing an outline of the configuration of the main part. A temperature recording device according to the present invention is mounted on a vehicle in which luggage is loaded in a luggage compartment where temperature control is performed, and temperature measuring means 100 for measuring the temperature inside the luggage compartment (not shown) at regular time intervals.
And temperature recording means 201 for recording the temperature data in association with time data when the temperature is measured. Further, a luggage compartment door opening / closing detection means 205 for detecting opening / closing of a luggage compartment door (not shown) provided at the luggage entrance / exit of the luggage compartment, and an inside of the luggage compartment measured by the temperature measuring means 100. A temperature abnormality determination unit 203 that compares the temperature data with a value within a proper range preset corresponding to the package and determines whether the temperature is within the proper range, and the luggage compartment door open / close detection Means 205
From the time when it is detected that the luggage compartment door is changed from the open state to the closed state, the counting of the predetermined temperature recovery scheduled time is started until the count reaches the temperature recovery scheduled time. While continuing the count,
The expected temperature recovery time counting means 202 that resets the count after the count reaches the expected temperature recovery time, and the temperature abnormality determination means 203 that the temperature data is an abnormal value outside the proper range. The alarm generation means 300 generates an alarm as auditory information when the temperature is determined to be abnormal, and the temperature recovery scheduled time counting means 2 is used when the temperature is determined to be an abnormal value.
If 02 is continuing the count, the alarm is not issued (or if the setting is changed, the volume of the alarm sound and the ringing duration can be suppressed to generate the alarm), and the temperature is an abnormal value. When it is determined that the temperature recovery scheduled time counting means 202 does not continue the counting, the alarm generating means 300 for issuing the alarm is provided in its main part.

Further, the expected temperature recovery time counting means 202, once the counting is once started,
Even if the luggage compartment door is changed from the closed state to the open state and then to the closed state before the counting is completed, a new counting from the new closed state is not started, and the closed state is maintained. Without resetting the counting that has been continued from before, once the counting is started, the counting that is being continued continues to the end.

Further, the temperature recovery scheduled time counting means 202 has the temperature control means (illustrated in the figure) installed for controlling the temperature of the luggage compartment of the vehicle as the predetermined temperature recovery scheduled time. When (omitted) normally functions, the time corresponding to the time required for the temperature of the luggage compartment to return to the proper range from the abnormal value outside the proper range is used.

Further, when the temperature recovery scheduled time counting means 202 is continuing the counting, the alarm generating means 300 uses the alarm as visual information instead of auditory information such as an alarm buzzer. This is shown on the liquid crystal display panel screen of the graph display means 400.

In the temperature measuring means 100, the temperature sensor 102 driven by the sensor drive circuit 101 measures the temperature of the luggage compartment at regular time intervals. Further, the alarm generation means 300 causes the buzzer sounding unit 301 to generate an alarm sound for warning the occurrence of the temperature abnormality in the room at times other than the scheduled temperature recovery time, and visually detects the temperature abnormality during the scheduled temperature recovery time. The alarm display unit 302 displays an alarm display for warning.

Further, this temperature recording device has various constitutions for performing a so-called temperature recording function of recording the monitored temperature data at each measurement time like the conventional temperature recording device. Needless to say. That is, the time when the temperature of the luggage compartment is measured at each of the fixed time intervals is plotted on a time axis taken on the time axis of the graph, and the time series transition of the temperature data corresponding to the time axis is plotted vertically. A temperature graph display data generating means 204 for generating display data for displaying a temperature graph showing the temperature that changes at each time.
Temperature graph display means 400 for displaying the temperature graph on a display screen, operation means 500 for performing input operation for operating the operation of the entire temperature recording device, and information recorded in the temperature recording means 201. IC card recording means 600 for recording the same information as in a removable IC card 601 is also provided.

Of the configuration of the above-mentioned main parts, the expected temperature recovery time counting means 202, the temperature abnormality determining means 203, the temperature graph display data generating means 204, and particularly the control circuit portion of the alarm generating means 300, or the sensor drive circuit 101. As shown in FIG. 2, for each part of the above, a calculation unit (CP) such as a microcomputer (microcomputer) is used.
U) 200 and the memory unit 700 can also be used to build in the arithmetic system. The temperature sensor 10
It goes without saying that a linear element such as 2 and the CPU may be connected via an I / F (interface) 206 as shown in FIG.

Further, among the constitutions of the main parts, the temperature measuring means 100, the temperature recording means 201, the temperature graph display data generating means 204, the temperature graph displaying means 400, the IC card recording means 600, and the IC card 601 are respectively It goes without saying that it is sufficient to use the one that has the same function as the conventional one.

Next, among the main parts in the technique of the present invention, especially the expected temperature recovery time counting means 202, the temperature abnormality determining means 203, the operating means 500, the alarm generating means 300 and its buzzer sounding part 301, and the alarm display part 302. The outline of the configuration and the operation of the configuration will be described below. FIG. 5 is a schematic flowchart showing the operation of the main part of such a temperature recording apparatus according to the present invention.

When a vehicle equipped with the temperature recording device according to the present invention starts its operation, the temperature is returned to the expected temperature recovery time counting means 202 via the operating means 500 by manual input by the user (driver or loading operator). Whether or not the planned recovery time is set, and if it is set, the value t0 of the planned temperature recovery time is input (step 1; s below).
Abbreviated as 1).

Then, the expected temperature recovery time counting means 2
02 holds the input information (s2). When the operation to select whether or not to set the scheduled temperature recovery time, that is, whether to suppress (or suppress) the temperature abnormality warning sound during the scheduled temperature recovery time, and to execute it The operation of inputting the set value of the scheduled temperature recovery time is performed, for example, at a time when the IC card 601 or the like is not installed and the operation mode is not switched to the running mode shortly after the vehicle starts operating. Automatically on the screen of the alarm display unit 302, for example, as shown in FIG.
A screen for selecting whether or not to stop the temperature abnormality alarm as shown in (a) and a screen for setting the expected temperature recovery time as shown in FIG. 6 (b) are sequentially displayed in this order. Then, when the setting information is input and operated at the same timing as that, the setting information is received inside the temperature recording apparatus according to the present invention and the expected temperature recovery time counting means 202.
Remembers.

Alternatively, the temperature abnormal alarm sound should be suppressed during such a scheduled temperature recovery time, and the set value of the scheduled temperature recovery time is fixedly set to a specific suitable value in advance. It goes without saying that it may be executed constantly. Alternatively, the temperature abnormality warning sound may be suppressed without fail, and the setting value of the scheduled temperature recovery time may be changed as described above. In this embodiment, the case where only such a set value can be changed has been described. For example,
In FIG. 6A, the alarm time is set, that is, in a state where “Yes” is selected among whether or not to suppress the alarm, and in FIG. 6B, 20 minutes is set as the set time. Each of the states is shown as an example.

Subsequently, when the work for setting and inputting the scheduled temperature recovery time is completed as described above, the temperature recording apparatus starts its entire operation. First, here, when the vehicle starts the transportation work, a work of loading a load in the luggage compartment or unloading a load that has been loaded until then is performed. At this time, the door of the luggage compartment must be opened once in order to load and unload luggage. Therefore, when loading and unloading such cargo, the temperature of the luggage compartment is inevitably affected by the outside air, so that what was previously kept at an appropriate temperature by the temperature control device deviated from the appropriate temperature. It begins to change in the direction of doing.

Then, when such loading and unloading of luggage is completed, the luggage compartment door of the vehicle is closed. Then, at this time, the luggage compartment door opening / closing detection means 205 attached to the luggage compartment door detects that the luggage compartment door is closed (Y in s3). Immediately after the luggage compartment door is closed, the temperature of the luggage compartment begins to return to a predetermined proper temperature again by the temperature control means such as the refrigerating device.

In this way, when it is detected that the luggage compartment door is closed (Y in s3), the expected temperature recovery time counting means 202 counts the expected temperature recovery time t by t =.
It starts from 0 and continues until t = t0 (s4). While the count of the expected temperature recovery time t starts from t = 0 and continues until t = t0 (Y of s5), D = L is information for determining that the count is continuing. It is continuously output (s6).

In the meantime, even if the luggage compartment door is opened and closed again, a new count based on the detection of the closed state of the luggage compartment door at that time is not started. That is, while the counting of t is continuing, even if it is detected that the luggage compartment door is newly closed, the expected temperature recovery time counting means 202
Does not stop or reset the ongoing count at all, and continues the ongoing count until the last t0.

As the clock function used for executing the counting of the expected temperature recovery time t, for example, a clock function normally provided inside the arithmetic unit (CPU) 200 of the above microcomputer is preferably used. Can be used. Alternatively, it goes without saying that a dedicated clock function may be additionally provided and used.

On the other hand, when the expected temperature recovery time t is not counted (t = 0), or the expected temperature recovery time t.
When the count of is completed up to t = t0 (N of s5), D = H is output as information for determining whether the temperature recovery is not scheduled, that is, the count of t is stopped or finished. (S7).

At this time, in particular, when the count of the expected temperature recovery time t has already been counted up to t = t0 (Y in s8), the count value of the expected temperature recovery time t is reset to t = 0 ( s9). On the other hand, the temperature measuring means 1
00 and the temperature abnormality determining means 203 are the temperature measuring means 1
00 indicates the temperature data T in the luggage compartment at a constant time interval Δt
When the measurement (monitoring) is performed for each (s10), the temperature abnormality determination unit 203 compares the temperature data T with a preset appropriate range value (Tl ≦ T ≦ Th) (s11),
When the temperature data deviates from the range, that is, when T <Tl or Th <T (N of s11),
It is determined that an abnormal value has occurred in the temperature, information indicating that the abnormal value has occurred; F = H is output, and the information is transmitted to the alarm generating means 300 (s13).

On the contrary, when the temperature data T is a value within the proper range (Tl≤T≤Th) (Y of s11), the temperature data T is judged as a normal value and the above-mentioned is performed. Instead of H, F = L is output as the information F, and the information is transmitted to the alarm generating means 300 (s12). Then, a waiting state is entered (not shown) until the timing at which the temperature data as the result of the next monitoring of the luggage compartment temperature is transmitted, and the temperature data T of the luggage compartment until the timing of the next monitoring is transmitted. Then, again, this T is compared with a value within a proper range (Tl ≦ T ≦ Th), and the above-mentioned s10
The same operation as the series of operations described in s13 is repeated.
It is to be noted that the outline flowchart of FIG. 5 is intended to mainly show the operation of alarm generation / suppression among the operations of the temperature recording apparatus according to the present invention.
Although each operation of 10 to s13 and s18 is depicted as being continuously performed with the operation of s1 to s9,
Actually, the operation of s1 to s9, that is, the operation of counting t after the door is closed, and the operation of s10 to s13 and s18, that is, the operation of detecting the temperature abnormality are basically performed in parallel and separately. Needless to say.

Then, when the information F = H indicating that the abnormal value has been generated is transmitted from the temperature abnormality determining means 203 (Y in s18), the alarm generating means 300 receives this and at that time, Means for counting the expected time of temperature recovery 2
When the information output from 02 is D = L, that is, during the temperature recovery scheduled time (Y in s14),
Since the alarm itself is likely to be meaningless because it is during the temperature recovery scheduled time, in order to avoid the complexity and the operation of stopping it, the alarm sound is suppressed and at the same time, It may be possible to cancel the alarm altogether, or it may be inconvenient if a situation that really requires the alarm occurs during that time. Therefore, in order to avoid it, the alarm display unit 302 warns the occurrence of the abnormal temperature value. Is displayed on a part of the screen of the temperature graph display means 400 (s15). Or the display of this warning is
It goes without saying that display means for displaying it exclusively may be provided separately from the temperature graph display means 400 and displayed. Then, a waiting state is entered until an input operation such as an alarm manual input stop or an alarm reset is performed (N in s16). Then, for example, when the alarm reset input is input (Y of s16), the series of operations related to the alarm is forcibly terminated (reset; s19), and the process returns to s3 and repeats the operations of s3 to s18 as described above.

However, here, when the information F = H indicating that the abnormal value has occurred is transmitted from the temperature abnormality determining means 203 (Y in s18), the temperature recovery scheduled time is reached at that time. When the information output from the counting means 202 is D = H, that is, when the temperature recovery scheduled time is out (N in s14), the temperature abnormality is warned because the temperature recovery is out of time. Alarm sound (such as a buzzer sound) because it is extremely necessary to
Is generated by the buzzer sounding unit 301 (s17).

Alternatively, if the temperature of the luggage compartment measured in s10 is not an abnormal value, the information F is F
= L is output (s12 described above), the operation of measuring the temperature for each Δt, that is, the operations of s10 to s13 and s18 are repeated. Here, in order to realize the function of deciding the generation / suppression of the alarm sound among the above-mentioned operations by the alarm generation means 300, for example, FIG.
As shown in, the information output from the temperature abnormality determining means 203, that is, the information F indicating whether or not the temperature abnormality has occurred (F = H when the temperature abnormality has occurred as described above, F = L when the temperature has a normal value). And information output from the scheduled temperature recovery time counting means 202, that is, information indicating whether or not during the planned temperature recovery time (D = L during the planned temperature recovery time, and D = H when outside the predicted temperature recovery time as described above). ) Is calculated, and a signal of an instruction to generate the alarm sound is output only when the result at that time is H (that is, only when F = H and D = H). A logical OR circuit element 303 is used so that the alarm sound (such as a buzzer sound) is generated by the buzzer sounding unit 301 only when the signal is output from the logical OR circuit element 303. Just do it.

By using such an extremely simple structure, the central portion of the technique of the present invention can be easily constructed, and the effect thereof is sufficiently effective as described above, which is preferable. Further, in order to display an alarm on the alarm display unit 302 when the temperature recovery scheduled time is reached when an abnormal value occurs in the temperature, for example, as shown in FIG. Upon receiving the discrimination information D, which is the information D (= L) output from the expected recovery time counting means 202, and the information F = H, which is output from the temperature abnormality determination means 203 and indicates that an abnormal value has occurred, the discrimination information is received. D
AND circuit element 30 which is the same as the OR circuit element 303 and the OR circuit element 303 which inverts and outputs the logic of = L
3'is used to calculate the logical sum, and a signal is output only when the result at that time is H (that is, when D = L and F = H), and this is displayed as the above alarm display. The alarm display may be executed by the alarm display unit 302 by using it as a command to be displayed. In addition, these FIG.
The circuits shown in (b) may be formed separately,
Alternatively, it goes without saying that the OR circuit element 303 may be shared and formed into a simpler structure.

Finally, when a command for forcibly ending the alarm or forcibly ending the operation of the temperature recorder itself is input as an interrupt mode in the middle of each of the above operations (Y in s20), The operation is forcibly stopped. In the description of the present embodiment, in order to simplify the entire description, the main part of the technique of the present invention, such as forced termination using such an interrupt mode and turning off the power switch of the entire temperature recording apparatus, is defined. Detailed explanations of matters that are not directly related have been briefly omitted.

The relationship between the operation for generating the alarm sound and the alarm display according to the present invention and the situation at that time (during the temperature recovery scheduled time / outside or the temperature state of the luggage compartment) is as follows.
In particular, FIG. 4 schematically shows the time-temperature graph when the temperature graph is displayed on the temperature graph display means 400. Here, in the figure, the horizontal axis of the graph represents time, and the vertical axis represents temperature (in degrees Celsius). Below the graph, the discrimination information D during / outside the scheduled temperature recovery time and the buzzer sounding (ON / OFF) at that time are shown in the form of a timing chart in order from the top. In FIG. 4, the horizontal time axis shown in the time-temperature graph is also common to the timing chart. In addition, in FIG. 4, the temperature recording apparatus according to the present invention having the above-described configuration and function is actually used in the situation such as the temporal change of temperature, the opening and closing of the luggage compartment door, and the set value t0. It is needless to say that the actual generation operation of the alarm sound at the time of the operation is simulated. For example, in FIG. 4, even when the luggage compartment door changes from the open state to the closed state at the time of opening and closing the luggage compartment door for the third time,
The counting operation of t is not reset, and counting from before that is continued.

As described above, when a temperature abnormality occurs outside the scheduled temperature recovery time, an alarm sound for notifying the abnormality can be emitted to surely warn the driver or the like. When the driver hears the alarm and notices the occurrence of a temperature abnormality, he / she takes appropriate appropriate action, such as reconfirming the switch of the temperature control engine or reconfirming the temperature setting. You can take it. On the other hand, if a temperature abnormality occurs during the scheduled temperature recovery time, a visual indication such as an alarm display is provided instead of the above-mentioned alarm sound so that the abnormality is perceived as an importance level that appropriately corresponds to the importance level. Since the warning is given by such a method, it is possible to accurately and accurately issue a temperature abnormality warning when it is really necessary while the vehicle is operating, while avoiding that the warning itself is complicated.

In the embodiment described above,
The counting of the scheduled temperature recovery time t has been described starting from the time when the luggage compartment door changes from the open state to the closed state, and triggered by the state change of the door at that time. In addition to this, the start timing may be started at the time when the luggage compartment door changes from the closed state to the open state.

In this case, when the alarm sound is suppressed, if it is counted as the time including the time during which the luggage compartment door is opened and the loading and unloading work is performed, It is possible to realize alarm suppression (or suppression) and alarm display while taking into consideration the problem of quality deterioration of packages exposed to temperature atmospheres outside the proper range during such loading and unloading work. it can. That is, as the temperature recovery scheduled time from the time when the luggage compartment door is opened, paying attention especially to the point of quality deterioration of the cargo, the quality of the cargo is exposed to a temperature atmosphere outside the proper range. It is desirable to set the time within the range that does not deteriorate.

Therefore, the expected temperature recovery time counting means 2
As the temperature recovery scheduled time t0 used by 02, it is preferable to adopt a time within a range in which the quality is not deteriorated even if the package is exposed to an indoor atmosphere having a temperature outside the appropriate range.
Alternatively, in addition to the viewpoint of the time within the range in which the quality of the package is not deteriorated, the viewpoint of the time required for the temperature recovery corresponding to the output characteristic of the temperature control means used in the present embodiment is considered. The value of the temperature recovery scheduled time t0 may be determined after taking into consideration the above.

On the contrary, from the viewpoint of the time required to recover the temperature corresponding to the output characteristic of the temperature control means used in this embodiment, the time within the range in which the quality of the package is not deteriorated is considered. In consideration of this, the value of the set data t0 used as the expected temperature recovery time t0 when the counting of the time t is started after the door is closed as in the above embodiment may be determined.

Further, in the above-mentioned embodiment, the case where the technique of the temperature recording apparatus of the present invention is applied to a freight transportation vehicle such as a refrigerating vehicle for transporting fresh food or the like has been described. In addition to this, it can be suitably used for transporting a special chemical substance that requires strict temperature control, or a cargo that requires strict temperature control on the high temperature side as opposed to cold temperature.

Further, as still another application example of the present invention, for example, the present invention can be applied to temperature control in a luggage room such as a warehouse for storing fresh foods, some chemical substances, etc. for which strict temperature control is required. Needless to say. In such a case, since the user who is to be notified of the alarm is the manager of the warehouse or the person in charge of temperature management in place of the above driver or the like, the buzzer of the alarm generation means 300 according to the present invention is particularly important. The ringing unit 301, the alarm display unit 302, and the like may be installed in an administrator waiting room in which a user such as such an administrator is resident, and the use thereof is optimized in consideration of such various usage conditions. Needless to say,

[0078]

As described above in detail, according to the present invention, in a temperature recording device used for a refrigerating vehicle, a refrigerating vehicle, or other transportation vehicles, a temperature abnormality at a scheduled temperature recovery time is detected. It solves problems such as complexity for drivers and dangers in vehicle driving work caused by meaningless alarms, and does not sound an alarm when the alarm is not needed during the scheduled temperature recovery time. It is possible to provide a temperature recording device equipped with an alarm generation means capable of generating a necessary alarm only when necessary and surely.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a main part of a temperature recording apparatus according to the present invention.

FIG. 2 shows a configuration of a main part of a temperature recording device according to the present invention,
It is a figure which shows an example of a schematic structure at the time of constructing centering around CPU.

FIG. 3 is a diagram showing a preferred example of a main part of an internal configuration of an alarm generating means 300 using an OR circuit element 303 and the like.

FIG. 4 is a practical example of a relationship between an operation for generating an alarm sound and an alarm display according to the present invention and a situation at that time (during temperature recovery scheduled time / outside or temperature condition of luggage compartment);
In particular, it is a diagram schematically showing a time-temperature graph when a temperature state is displayed on the temperature graph display means 400.

FIG. 5 is a schematic flowchart showing the main operation of the temperature recording apparatus according to the present invention.

FIG. 6 is a diagram showing an example of a screen (a) for selecting whether or not to stop the temperature abnormality alarm displayed on the screen of an alarm display unit 302 and a screen (b) for setting a scheduled temperature recovery time. Is.

[Explanation of symbols]

100 ... Temperature measuring means 201 ... Temperature recording means 202 ... Temperature recovery scheduled time counting means 203 ... Temperature abnormality determining means 204 ... Temperature graph display data generating means 205 ... Luggage compartment door open / close detection means 300 ... Alarm generating means 400 ... Temperature graph display means 500 ... Operation means 600 ... IC card recording means 601 ... IC card

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01K F25D

Claims (3)

(57) [Claims] 1. A temperature recording device mounted on a vehicle in which luggage is loaded in a luggage compartment whose temperature is controlled, wherein the temperature measuring means measures the temperature inside the luggage compartment at regular time intervals. In a temperature recording device having temperature recording means for recording temperature data in association with time data when the temperature is measured, data of temperature inside the luggage compartment measured by the temperature measuring means. Is provided in the luggage entrance / exit of the luggage compartment, and a temperature abnormality determination means for comparing the value with a value within an appropriate range preset corresponding to the luggage to determine whether the value is within the appropriate range. And a luggage compartment door opening / closing detecting means for detecting opening / closing of the luggage compartment door, and the luggage compartment door opening / closing detecting means for closing the luggage compartment door .
From the time when the open state is detected from the state , counting of a predetermined temperature recovery scheduled time is started, and the count is continued until the count reaches the temperature recovery scheduled time. After the count reaches the temperature recovery scheduled time, the next wait for the luggage compartment door open / close detection
A temperature recovery scheduled time counting means for returning and an alarm as auditory information using an auditory medium when the temperature abnormality determining means determines that the temperature data is out of the proper range. Alarm generation means, when the temperature recovery scheduled time counting means is continuing the count when it is determined that the temperature is an abnormal value, does not generate or suppress the alarm, the temperature when said temperature recovery scheduled time counting means has not continued the count, and a warning generating means for generating the alarm, the temperature recovery expected time counting means when it is determined to be abnormal value In addition,
The baggage should be suitable for the specified scheduled temperature recovery time.
Deterioration of quality even when exposed to an indoor atmosphere with a temperature outside the positive range
A temperature recording device characterized by being set to a time within a range not to be set . 2. The temperature recording apparatus according to claim 1, wherein the temperature recovery scheduled time counting means further includes opening the luggage compartment door after once starting the counting and before ending the counting. from state is again opened in the closed state, without starting a new count from the open state, it continues to the end without resetting the count ongoing previously said open state count A temperature recording device characterized by: 3. The temperature recording device according to claim 1 or 2, wherein the alarm generating means is configured to count the expected temperature recovery time.
If the stage is continuing the count,
Alarm generation that is shown as visual information instead of the auditory information
A temperature recording device characterized by being means .