JP2010032092A - Automatic ventilation system, air conditioner, and refrigerating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic ventilation system 2 capable of coping with failure of the automatic ventilation device 20 by predicting the same in advance. <P>SOLUTION: This automatic ventilation system 2 comprising an automatic ventilation opening 21 to be automatically opened and closed by driving a motor, includes a motor life time determining section 612 for determining the life time of the motor 22, and a display section 650 for displaying the warning to a use, and a display section 650 performs the display for warning, when the motor life time determining section 612 determines the arrival of the end of life time of the motor 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automatic ventilation system, and an air conditioner and a refrigeration apparatus including the automatic ventilation system.

  An automatic ventilator (CA) is attached as an option to a refrigeration apparatus (see, for example, Patent Document 1) installed in a sealed space such as a container according to the cargo (cargo). There is something. Here, CA is a device that opens and closes a ventilation opening by driving a motor and adjusts the ventilation amount.

  For example, when the container cargo is fruits and vegetables, the fruits and vegetables themselves may be damaged by gas such as carbon dioxide emitted from the fruits and vegetables when the container cargo is not ventilated and sealed. When a CA is installed, the generated gas is exhausted to the outside of the container by the automatic ventilation of the CA. Therefore, such a situation can be prevented. It will be directly linked to the damage.

Conventionally, in order to prevent cargo damage, a countermeasure has been taken such that a spare CA is prepared so that the failed CA can be immediately replaced when the CA fails.
JP 2002-327964 A

  However, even if the conventional measures are taken, the user cannot predict the CA failure in advance, and will respond after the CA stops due to the failure. For example, the motor that drives the ventilator of the CA may stop at the end of its life due to a failure or the like, and the CA may stop. In this case, if the user is late in noticing that the CA has stopped and the CA replacement is delayed, cargo damage may not be prevented.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to predict in advance a CA failure that occurs when the motor that drives the ventilation port of the CA reaches the end of its life. .

  An automatic ventilation system according to one aspect of the present invention is an automatic ventilation system having an automatic ventilation opening that automatically opens and closes by driving a motor, and includes a motor life determination means for determining the life of the motor, and a warning to a user. And a notification means for performing the warning, when the motor life determination means determines that the life of the motor has been reached, the notification means warns to that effect (Claim 1).

  According to this configuration, when the motor reaches the end of its life, the user can surely know the end of the life of the motor.

  In the above configuration, the motor life determination unit includes a current value measurement unit that measures a current value of the motor, and an abnormal current value determination that determines whether or not the current value is an abnormal current value outside a predetermined range. When the abnormal current value determining unit determines that the abnormal current value is an abnormal current value, it is preferable that the motor life determining unit determines that the life of the motor has been reached (Claim 2).

  According to this configuration, when the current value measuring unit measures the current value of the motor and the abnormal current value determining unit determines that the measured value is an abnormal current value, the motor life determining unit is It is determined that the service life has been reached. Therefore, it is possible to determine whether the motor has reached the end of its life by a simple method called current value measurement.

  In the above configuration, the abnormal current value determining means determines that the abnormal current value is an abnormal current value when the abnormal current value continues for a predetermined time or more, and if the duration of the abnormal current value is less than a predetermined time, an abnormal current value is determined. It is desirable not to determine the current value (claim 3).

  According to this configuration, the abnormal current value is determined only when the abnormal current value continues for a predetermined time or longer. Therefore, when the output current value of the power supply of the automatic ventilation system is temporarily changed and the current value of the motor is also changed, erroneous detection as an abnormal current value can be prevented. This is because, for example, the current value of the motor may become unstable due to the output current value of the power supply of the automatic ventilation system 2 becoming unstable.

  In the above configuration, the motor life determination unit further includes a motor integrated drive time measuring unit that measures an integrated drive time of the motor, and when the integrated drive time has reached a predetermined integrated drive time, It is desirable to determine that the life of the motor has been reached (claim 4).

  According to this configuration, when the cumulative drive time of the motor has reached a predetermined cumulative drive time, the notification means warns that the motor has reached the end of its life. Therefore, the user can surely know that the life of the motor has been reached.

  In the above configuration, the motor life determination means may determine the motor life during defrost operation.

  According to this configuration, the motor life determination means determines the motor life at the time of defrost operation performed every predetermined time. Therefore, there is no need to separately set the timing for measuring data for determining the motor life.

  In the above-described configuration, the automatic ventilation system further includes a manual ventilation port that can be manually opened and closed, and a scale that allows a user to recognize the opening amount of the manual ventilation port, and the motor life determination unit reaches the life of the motor. The notification means notifies the user of the value of the scale corresponding to the opening amount of the manual ventilation port equal to the opening amount of the automatic ventilation port, so that the opening amount of the manual ventilation port is determined. It is desirable to provide guidance (claim 6).

  According to this configuration, the user can know the opening amount of the manual ventilation port corresponding to the opening amount of the automatic ventilation port. Therefore, when the automatic ventilation system breaks down, even when there is no spare device, the manual ventilation opening can be manually opened to ensure the necessary opening amount, and cargo damage can be prevented.

  In the above configuration, the automatic ventilation system includes a gas concentration measuring unit that measures a gas concentration in a warehouse for a predetermined type of gas, and a gas concentration determination that determines whether the gas concentration exceeds a predetermined threshold value. Means for determining whether the gas concentration exceeds a predetermined threshold value, and the notifying means is required to make the gas concentration equal to or lower than the threshold value when the gas concentration determination means determines that the gas concentration exceeds a predetermined threshold value. It is desirable to notify the user of the value of the scale corresponding to the opening amount of the ventilation port (Claim 7).

  According to this configuration, when the gas concentration of a predetermined type of gas exceeds a predetermined threshold, the user knows the opening amount of the manual ventilation port that is necessary to bring the gas concentration below the threshold. Can do. Therefore, when the gas concentration of a predetermined type of gas exceeds a predetermined threshold, the user can ventilate with an appropriate ventilation amount to keep the gas concentration below the threshold. Therefore, cargo damage can be prevented for cargo that generates gas such as fruits and vegetables.

  The said structure WHEREIN: The kind of said gas can be made into a carbon dioxide (Claim 8). According to this configuration, since the concentration of carbon dioxide, which is a main gas that generates cargo, can be kept below a threshold value, cargo damage can be prevented.

  An air conditioner or a refrigeration apparatus according to another aspect of the present invention includes any one of the above automatic ventilation systems (claims 9 and 10). According to this configuration, when the motor that opens and closes the automatic ventilation port of the automatic ventilation system provided in the air conditioner or the refrigeration apparatus has reached the end of its life, the user can reliably know that the life of the motor has been reached. it can.

  ADVANTAGE OF THE INVENTION According to this invention, the user can know reliably the lifetime end of the motor which opens and closes the automatic vent of an automatic ventilation system. Therefore, since the user can predict and cope with a failure of the automatic ventilation system due to the end of the life of the motor in advance, cargo damage can be prevented in advance. Therefore, loss due to cargo damage can be avoided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram for illustrating an installation state of a refrigeration apparatus 1 including an automatic ventilation system 2 according to an embodiment of the present invention. In FIG. 1, the refrigeration apparatus 1 is installed on the substantially square side surface of the container. As for the automatic ventilation system 2, only an automatic ventilation device (CA) 20 and a manual ventilation port 30 which are constituent elements are illustrated. The overall configuration of the automatic ventilation system 2 will be described in detail later.

  In the example of FIG. 1, a refrigeration apparatus main body 10 is attached below the side surface, and a CA20 having a flat and substantially rectangular parallelepiped shape is attached to the left side center of the side surface. A substantially square manual ventilation port 30 is provided above the left side end of the side surface. It has been. The CA 20 is a device that opens and closes the automatic ventilation opening 21 by driving the motor 22 and adjusts the ventilation amount.

  FIG. 2 is a schematic diagram showing the structure of CA20. The CA 20 includes a main body case 25, an automatic ventilation port 21, a motor 22, a shutter 23, and a shaft 24.

  The main body case 25 has a flat, substantially rectangular parallelepiped box shape. One of the two widest surfaces 201 is the installation surface on the wall surface of the container, and a surface 202 facing the surface 201 is exposed to the outside of the container. The surface 202 is a motor mounting surface to which the motor 22 is attached.

  A plurality of the automatic ventilation ports 21 are opened on the side close to the surface 201 of the two wide surfaces 203 next to the main body case 25. In FIG. 2, only the automatic ventilation port 21 opened in the front surface 203 is illustrated.

  The motor 22 is attached to the motor attachment surface 202 and provides a driving force for operating the shutter 23.

  The shutter 23 is a shutter for opening and closing the automatic ventilation port 21. By moving up and down in FIG. 2, the automatic ventilation port 21 is opened with a predetermined opening amount.

  The shaft 24 is interposed between the motor 22 and the shutter 23 in order to open and close the automatic ventilation port 21 by the shutter 23, and converts the rotational driving force generated by the motor 22 into a linear reciprocating motion to convert the shutter 23. It is a member which has the function to transmit to.

  The automatic ventilation port 21 of the CA 20 is controlled so as to be closed by the shutter 24 when the CA 20 is not in operation, and the CA 20 is opened with a predetermined opening amount when the CA 20 is in operation.

  FIG. 3 is a block diagram showing a functional configuration of the refrigeration apparatus 1 including the automatic ventilation system 2 according to an embodiment of the present invention. The refrigeration apparatus 1 includes a refrigeration apparatus main body 10 and an automatic ventilation system 2.

  The refrigeration apparatus main body 10 includes a refrigerant circuit (not shown), and cools the inside of the container by executing a refrigeration cycle.

The automatic ventilation system 2 includes an automatic ventilation device 20, a manual ventilation port 30, an ammeter 40 (current value measurement means), a CO ₂ sensor 50 (gas concentration measurement means), and a controller 60.

  The CA 20 ventilates the container by opening and closing the automatic ventilation port 21 by driving the motor 22. The opening amount of the automatic ventilation port 21 is automatically adjusted by the controller 60.

  The manual ventilation port 30 is configured so that the door can be manually opened and closed. The manual ventilation port 30 is for performing ventilation when the CA 20 fails and the automatic ventilation port 21 cannot be opened or closed. As shown in FIG. 4, the manual ventilation port 30 includes a scale 33 that serves as a measure of the amount of opening.

  In the example of FIG. 4, the manual ventilation port 30 includes a substantially square opening 31 and a substantially square sliding door type door 32 that opens and closes the opening 31, and the scale 33 is located on the lower side of the opening 31. The lower side is marked, for example, so as to be divided into 10 equal parts. When the right end of the door 32 is at the position 100 of the scale 33, the opening 31 is fully opened, and when it is at the 0 position, the opening 31 is completely closed.

  The ammeter 40 is used for measuring the drive current value of the motor 22. The current value is measured at the time of defrost operation periodically performed at predetermined time intervals.

The CO ₂ sensor 50 includes, for example, a light source that emits infrared rays and a light receiving element that receives the infrared rays, and measures the CO ₂ concentration by measuring the amount of infrared rays absorbed by CO ₂ molecules. The opening amount of the automatic ventilation port 21 is controlled by the controller 60 so that the carbon dioxide concentration inside the container becomes a predetermined threshold value or less.

  The controller 60 controls the operation of the refrigeration apparatus body 10 and the CA 20. In addition, although the example which performs the operation control of both refrigeration apparatus main body 10 and CA20 is shown in a present Example, the operation control of refrigeration apparatus main body 10 and CA20 is isolate | separated, and the operation control of refrigeration apparatus main body 10 is performed. A controller may be provided separately.

  The controller 60 includes a control unit 610, a ROM (Read Only Memory) 620, a RAM (Random Access Memory) 630, a timer unit 640, and a display unit 650 (notification means).

The control unit 610 includes a CPU (Central Processing Unit) and the like, and executes a control program stored in the ROM 620, whereby a system control unit 611, a motor life determination unit 612 (motor life determination unit) are illustrated in FIG. ), CO ₂ concentration determination unit 615 (the gas concentration determining means) functions to include a display control unit 616.

  The system control unit 611 performs overall control of the refrigeration apparatus 1 such as operation control of the refrigeration apparatus body 10 and operation control of the CA 20.

  The motor life determination unit 612 includes an abnormal current value determination unit 613 (abnormal current value determination unit) and a motor integrated drive time measurement unit 614 (motor integrated drive time measurement unit).

  The abnormal current value determining unit 613 determines that the current value of the motor 22 measured by the ammeter 40 is an abnormal current value when the current value is outside the predetermined range for a predetermined time, for example, 5 seconds or more. To do. Even if the current value of the motor 22 measured by the ammeter 40 is outside the predetermined range, if the duration is less than the predetermined time, the abnormal current value determination unit 613 converts the current value to the abnormal current. Not determined as a value. Note that the lower limit value of the duration and the upper and lower limit values of the current value, which are threshold values for determining the abnormal current value, are stored in the ROM 620 in advance.

  When the abnormal current value determination unit 613 determines the abnormal current value, the system control unit 611 causes the display unit 650 to display a display (alarm code A) prompting the user to replace CA. To instruct. The alarm code A is a display such as “Err11” corresponding to the determination of the abnormal current value.

  The motor integrated drive time measuring unit 614 measures the integrated drive time from the start of operation of the motor 22 based on the clock signal generated by the time measuring unit 640 and compares the integrated drive time with the guaranteed drive time of the motor 22. . The drive guarantee time is a life time in the specification of the motor 22 and is a time used as a threshold of the accumulated drive time in the life determination of the motor 22. The guaranteed driving time is stored in advance in the ROM 620 according to the type of the motor 22.

  When the motor integrated drive time becomes a predetermined ratio with respect to the drive guarantee time of the motor 22, for example, 90% or more, the system control unit 611 displays the CA integrated operation time as the motor integrated drive time on the display unit 650. The display control unit 616 is instructed to blink.

  Further, when the motor integrated driving time reaches the guaranteed driving time of the motor 22, the system control unit 611 causes the display unit 650 to display a display (alarm code B) prompting the user to replace the CA 20 on the display unit 650. To instruct. The alarm code B is a display such as “Err12” corresponding to the determination that the guaranteed driving time has been reached.

  When the abnormal current value determining unit 613 determines that the current value of the motor 22 is an abnormal current value, or the motor integrated driving time measured by the motor integrated driving time measuring unit 614 has reached the guaranteed driving time. If it is determined that the motor 22 has reached the end of its service life.

  When the motor life determination unit 612 determines that the motor 22 has reached the end of its life, the operation of the CA 20 is stopped. Even when the operation of the CA 20 is stopped, the operation of the refrigeration apparatus main body 10 is continued to prevent cargo damage.

  When it is determined that the motor 22 has reached the end of its life and the CA 20 is stopped, the system control unit 611 sets the value of the scale 33 corresponding to the opening amount of the manual ventilation port 30 that is equal to the opening amount of the automatic ventilation port 21. The display control unit 616 is instructed to display on the display unit 650.

The CO ₂ concentration determination unit 615 determines whether or not the CO ₂ concentration in the container measured by the CO ₂ sensor 50 exceeds a predetermined threshold value. The CO ₂ concentration threshold value is stored in the ROM 620 in advance.

When the CO ₂ concentration in the container exceeds a predetermined threshold value, the system control unit 611 instructs the CA 20 to open the automatic ventilation port 21 with an opening amount necessary for making the CO ₂ concentration equal to or less than the threshold value.

When the motor 22 reaches the end of its life and the CA 20 stops, ventilation is not performed, so that CO ₂ generated from cargo in the container accumulates and the CO ₂ concentration in the container exceeds a predetermined threshold value. The system control unit 611 instructs the display control unit 616 to display the value of the scale 33 corresponding to the opening amount of the manual ventilation port 30 necessary for setting the CO ₂ concentration below the threshold value. When the CA 20 is in operation, the opening amount is automatically set to an opening amount necessary to make the CO ₂ concentration equal to or less than the threshold value when the CO ₂ concentration in the container exceeds a predetermined threshold value. It is equal to the opening amount of the automatic ventilation port 21 to be performed.

  The display control unit 616 controls the display operation in the display unit 650. For example, when an instruction for generating the alarm code A is given, the display control unit 616 generates the alarm code A and causes the display unit 650 to display the alarm code A. Further, when the generation operation blinking display signal or the alarm code B generation instruction is given, the display control unit 616 generates the integration operation time blink display signal or the alarm code B to display the integration operation time blink display or The alarm code B is displayed on the display unit 650.

ROM620 consists of non-volatile memory, and the control program etc. of refrigeration equipment 1 are stored. Furthermore, in the present embodiment, the above-described various threshold values such as the upper and lower limit values of the current value of the motor 22, the lower limit value of the duration of the abnormal current value, the drive guarantee time, and the upper limit value of the CO ₂ concentration are stored.

  The RAM 630 is a memory that stores various measurement values and the like, and is used as a work area for a control program to perform processing. In the present embodiment, the accumulated drive time of the motor 22, the current value of the motor 22 measured during the defrost operation, and the like are stored.

  The timer unit 640 includes a clock transmitter that generates a clock signal at a constant period, and outputs the clock signal to the motor integrated drive time measuring unit 614. Based on the clock signal, the motor integrated drive time measuring unit 614 measures the integrated drive time from the start of operation of the motor 22.

  The display unit 650 receives the display signal generated by the display control unit 616 and displays the operation state of the refrigeration apparatus 1 and various warnings.

  FIG. 5 is a diagram for illustrating the configuration of the display unit 650 and various display contents. As shown in FIG. 5A, the display unit 650 includes a light emitting diode (LED) lamp group 651, an LED display 652, an LCD (liquid crystal display) 653, and an operation panel 654.

  The LED lamp group 651 includes a plurality of (eight in FIG. 5A) LED lamps, and indicates the operation mode of the refrigeration apparatus 1 or the like by turning on one or a plurality of LED lamps. One of the LED lamps constituting the LED lamp group is an alarm lamp 651a.

  The LED display 652 is a display composed of, for example, a plurality of 7-segment LEDs, and mainly displays numerical information such as an alarm code, an accumulated operation time of CA, an opening amount of the manual ventilation port 30, and the like.

  The LCD 653 displays details of the operating state of the refrigeration apparatus 1, an explanation of the display content of the LED display 652, and the like.

  The operation panel 654 includes a plurality of operation buttons. The display content of the LED display 652 can be switched by the operation button. In this embodiment, the operation panel 654 is also used for operations of the refrigeration apparatus 1 such as power ON / OFF and manual switching of operation modes.

  Upon normal operation of the CA, upon receiving an instruction from the display control unit 616, the display unit 650 displays the accumulated operation time of the CA on the LED display 652, and the LED display on the LCD 653, as shown in FIG. For example, a display such as “CA integrated operation time” indicating the display content of 652 is displayed.

  When the motor integrated driving time becomes 90% or more of the guaranteed driving time of the motor 22, in response to an instruction from the display control unit 616, the display unit 650 displays the LED indicator 652 as shown in FIG. The display in FIG. 5B is changed so that the accumulated operation time of CA displayed in FIG.

  When the motor integrated driving time reaches the guaranteed driving time of the motor 22, in response to an instruction from the display control unit 616, the display unit 650 turns on the alarm lamp 651a as shown in FIG. The alarm code B is displayed on the LED display 652.

  When the abnormal current value determination unit 613 determines that the current value of the motor 22 is an abnormal current value, the display unit 650 receives an instruction from the display control unit 616, and the display unit 650 displays an alarm as shown in FIG. The lamp 651a is turned on and the alarm code A is displayed on the LED display 652.

When the motor 22 reaches the end of its life and the CO ₂ concentration in the container exceeds a predetermined threshold value, the display unit 650 receives the instruction from the display control unit 616, and as shown in FIG. ₂ The value of the scale 33 corresponding to the opening amount of the manual ventilation port 30 required to make the concentration below the threshold value is displayed on the LED display 652 and, for example, “CA failure. Manual ventilation is required with the above opening amount” A message prompting the user to perform manual ventilation is displayed on the LCD 653. Note that the display in FIG. 5F is alternately displayed with the display in FIG. 5D or 5E.

  The operation of the refrigeration apparatus 1 described above will be described based on the flowchart shown in FIG. When the refrigeration apparatus 1 is activated, the refrigeration apparatus 1 enters an operation check mode, and it is confirmed whether or not the CA 20 operates normally.

  First, the system control unit 611 transmits an opening / closing operation request instructing to open / close the automatic ventilation port 21 to the CA 20 (step S1).

  If there is no response from the CA 20 to the opening / closing operation request (YES in step S2), the alarm code A is displayed on the display unit 650 (FIG. 5D), and the user is alerted to replace the CA. (Step S9). If there is a response (NO in step S2), the abnormal current value determination unit 613 determines whether or not the current value of the motor 22 is an abnormal current value (step S3).

  If the current value of the motor 22 continues for more than 5 seconds and is outside the predetermined range (YES in step S3), the abnormal current value determination unit 613 determines that the current value is an abnormal current value, and proceeds to step S9. move on. When it is not determined that the current is an abnormal current value (NO in step S3), the motor integrated drive time measurement unit 614 measures the integrated drive time from the start of operation of the motor 22, and the integrated drive time and the motor 22 drive guarantee. Time is compared (step S4).

  When the motor integrated drive time is 90% or more of the guaranteed drive time of the motor 22, the integrated operation time of CA20 is displayed blinking on the display unit 650 (FIG. 5C), and the user is asked to replace the CA. Attention is given (step S10). When the motor integrated driving time is less than 90% of the guaranteed driving time of the motor 22, the refrigeration apparatus 1 enters the normal operation mode (step S5).

The system control unit 611 transmits an opening / closing operation request to the CA 20 to instruct the automatic ventilation port 21 to be opened with a predetermined opening amount as necessary, for example, when the CO ₂ concentration in the container exceeds a predetermined threshold value. (YES in step S6). In this case, the process returns to step S2.

  If the refrigeration apparatus 1 is continuously operated after the start of normal operation (NO in step S7), the refrigeration apparatus 1 starts defrost operation after a predetermined time has elapsed (step S8). When the defrost operation is started, the process returns to step S3. That is, the abnormal current value determination by the abnormal current value determination unit 613 is performed every time the defrost operation is performed.

  While the motor 22 does not reach the end of its life and the refrigeration apparatus 1 is continuously operated, steps S2 to S8 are repeated.

  However, as described above, when there is no response from the CA to the opening / closing operation request transmitted by the system control unit 611 (YES in step S2), or the abnormal current value determination unit 613 determines the current value of the motor 22 as the abnormal current. If it is determined that the value is a value (YES in step S3), the process proceeds to step S9. If the motor integrated drive time is 90% or more of the guaranteed driving time of the motor 22, the process proceeds to step S10.

  In step S10, when the operation of the refrigeration apparatus 1 is continued without replacing the CA 20, and the motor integrated drive time reaches the drive guaranteed time of the motor 22 (YES in step S11), the CA 20 is stopped and an alarm is issued. The code B is displayed on the display unit 650 (FIG. 5E), and the user is alerted to exchange the CA (step S12).

If the process proceeds to step S9 or step S12, the CA 20 stops. When ventilation is not performed and CO ₂ generated from the cargo in the container accumulates and the CO ₂ concentration in the container exceeds a predetermined threshold value (YES in step S13), to reduce the CO ₂ concentration to the threshold value or less. The value of the scale 33 corresponding to the opening amount of the manual ventilation port 30 required for the display is displayed on the display unit 650 (FIG. 5F, step S14). The opening amount during CA20 operation, if the CO ₂ concentration in the container exceeds a predetermined threshold value, a predetermined amount of opening needed for the CO ₂ concentration below the threshold, automatically opening It is equal to the opening amount of the automatic ventilation port 21 to be performed. That is, the user, by opening the manual ventilation opening 30 in the value of the scale 33 displayed on the display unit 650 performs ventilation in appropriate ventilation, it is possible to suppress the CO ₂ concentration below the threshold.

  While the refrigeration apparatus 1 is continuously operated (NO in step S15), steps S13 to S15 are repeated.

  According to the refrigeration apparatus 1 according to the present embodiment described above, the automatic ventilation system 2 including the automatic ventilation port 21 that automatically opens and closes by driving the motor 22 includes the motor life determination unit 612 that determines the life of the motor 22 and A display unit 650 that displays a warning to the user. When the motor life determination unit 612 determines that the life of the motor 22 has been reached, a warning to that effect is displayed on the display unit 650. Therefore, when the motor 22 reaches the end of its life, the user can surely know that the life of the motor 22 has been reached.

  Furthermore, according to the refrigeration apparatus 1 according to the present embodiment, when the abnormal current value determination unit 613 determines that the current value of the motor 22 measured by the ammeter 40 is an abnormal current value, the motor life determination unit 612 It is determined that the life of the motor 22 has been reached. Therefore, the end of the life of the motor 22 can be determined by a simple method called current value measurement.

  Furthermore, according to the refrigeration apparatus 1 according to the present embodiment, the abnormal current value determination unit 613 performs an abnormal operation when the current value measured by the ammeter 40 is a current value outside a predetermined range for a predetermined time. It is determined that the current value. Therefore, even if the current value of the motor 22 fluctuates temporarily in conjunction with the fluctuation of the output current value of the power source of the refrigeration apparatus 1, it can be prevented that it is erroneously detected as an abnormal current value.

  Furthermore, according to the refrigeration apparatus 1 according to the present embodiment, when the integrated drive time of the motor 22 has reached the drive guarantee time, a warning that the motor 22 has reached the end of life is displayed on the display unit 650. Therefore, the user can surely know that the life of the motor 22 has been reached.

  Furthermore, according to the refrigeration apparatus 1 according to the present embodiment, the motor life determination unit 612 determines the life of the motor 22 only at the time of defrost operation performed every predetermined time. Therefore, it is not necessary to set the timing for determining the motor life.

  Furthermore, according to the refrigeration apparatus 1 according to the present embodiment, the scale 33 corresponding to the opening amount of the manual ventilation port 30 that is equal to the opening amount of the automatic ventilation port 21 when it is determined that the motor 22 has reached the end of its life. Is displayed on the display unit 650. Therefore, the user can know the opening amount of the manual ventilation port 30 corresponding to the opening amount of the automatic ventilation port 21. Therefore, when the automatic ventilation system 2 breaks down, even when there is no spare CA 20, the manual ventilation port 30 can be manually opened to ensure a necessary opening amount, thereby preventing cargo damage. it can.

Furthermore, according to the refrigeration apparatus 1 according to the present embodiment, when the motor 22 reaches the end of its life, when the CO ₂ concentration in the container exceeds a predetermined threshold, it is necessary to make the CO ₂ concentration below the threshold. The value of the scale 33 corresponding to the opening amount of the manual ventilation port 30 is displayed on the display unit 650. Therefore, the user can know the amount of opening of the manual vent 30 required to the CO ₂ concentration below the threshold. Therefore, the user can keep the CO ₂ concentration below the threshold value by opening the manual ventilation opening 30 with the opening amount, so that the cargo damage is prevented with respect to the cargo that generates gas such as fruits and vegetables. it can.

  The refrigeration apparatus 1 according to the embodiment of the present invention has been described above, but the present invention is not limited to this, and for example, the following modified embodiment can be taken.

  (1) In the above embodiment, the current value of the motor 22 is used as one of the parameters used for determining the motor life. Instead, using the rotation speed of the motor 22 as a parameter, for example, when the rotation speed decreases to a rotation speed less than a predetermined ratio with respect to the rotation speed of the motor 22 during normal operation, the motor 22 It may be determined that the lifetime is.

  (2) In the above embodiment, when the current value of the motor 22 measured by the ammeter 40 is a current value outside a predetermined range for a predetermined time, the abnormal current value determination unit 613 is an abnormal current value. If the automatic ventilation system 2 is installed in a stable power supply environment and the output current value of the power supply of the automatic ventilation system 2 is stable, the condition that it continues for a predetermined time is set. It may be determined that the current value is abnormal when the current value outside the predetermined range is detected.

  (3) In the above embodiment, since only the defrost operation is performed periodically in the refrigeration apparatus 1, the current value of the motor 22 is measured during the defrost operation. Instead of this, for example, when it is desired to measure the current value at an interval shorter than the defrost operation interval, the current value measurement interval may be different from the defrost operation interval.

(4) instead of the CO ₂ sensor 50 of the above embodiments, or in addition to the CO ₂ sensor 50, for example, can be used a gas sensor such as ethylene gas sensor.

  (5) In the above embodiment, the automatic ventilation system 2 is applied to the refrigeration apparatus 1, but the automatic ventilation system 2 can be widely applied to all air conditioners including the refrigeration apparatus.

  (6) In the above embodiment, the display unit 650 is provided as a notification unit that issues a warning to the user. Instead of this, or in addition to this, a sound such as a beep sound may be generated from the controller 60.

It is a mimetic diagram for showing the installation state of the refrigerating device provided with the automatic ventilation system concerning one embodiment of the present invention. It is a schematic diagram which shows the structure of an automatic ventilation apparatus. It is a block diagram which shows the functional structure of the freezing apparatus provided with the automatic ventilation system which concerns on one Embodiment of this invention. It is a figure which shows an example of the manual ventilation port with which the automatic ventilation system which concerns on one Embodiment of this invention is provided. It is a figure for showing the composition of a display part, and various display contents. (A) is the configuration of the display unit, (B) is the display content during normal operation, (C) is the display content when the motor life is near, and (D) is when the current value of the motor 22 is an abnormal current value. Display contents, (E), display contents when the motor 22 has reached the guaranteed drive time, and (F), display contents when prompting the user to perform manual ventilation, respectively. It is a flowchart which shows operation | movement of the freezing apparatus which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigeration equipment 2 Automatic ventilation system 20 Automatic ventilation equipment 21 Automatic ventilation opening 22 Motor 30 Manual ventilation opening 40 Ammeter (current value measuring means)
50 CO ₂ sensor (gas concentration measuring means)
612 Motor life determination unit (motor life determination means)
613 Abnormal current value determination unit (abnormal current value determination means)
614 Motor integrated drive time measuring unit (motor integrated drive time measuring means)
615 CO ₂ concentration determination means (gas concentration determination means)
650 Display unit (notification means)

Claims (10)

An automatic ventilation system having an automatic ventilation opening (21) that automatically opens and closes by driving a motor (22),
Motor life determination means (612) for determining the life of the motor;
Notification means (650) for giving a warning to the user,
When the motor life determination means (612) determines that the life of the motor (22) has been reached, the notification means (650) warns to that effect. The motor life determination means (612)
Current value measuring means (40) for measuring a current value of the motor (22);
An abnormal current value determining means (613) for determining whether or not the current value is an abnormal current value outside a predetermined range;
The automatic ventilation system according to claim 1, wherein when the abnormal current value determining means (613) determines an abnormal current value, the motor life determining means (612) determines that the life of the motor has been reached.   The abnormal current value determining means (613) determines that the abnormal current value is an abnormal current value when the abnormal current value continues for a predetermined time or more, and if the duration of the abnormal current value is less than a predetermined time, the abnormal current value The automatic ventilation system according to claim 2, which is not determined as a value.   The motor life determining means (612) further includes motor integrated drive time measuring means (614) for measuring the integrated drive time of the motor, and when the integrated drive time has reached a predetermined integrated drive time. The automatic ventilation system according to any one of claims 1 to 3, wherein it is determined that the life of the motor (22) has been reached.   The automatic ventilation system according to any one of claims 1 to 4, wherein the motor life determination means (612) determines the motor life during defrost operation. A manual ventilation opening (30) that can be manually opened and closed;
A scale (33) for allowing the user to recognize the opening amount of the manual ventilation port (30),
When the motor life determination means (612) determines that the life of the motor (22) has been reached, the notification means (650) has the manual ventilation port (30) equal to the opening amount of the automatic ventilation port (21). The automatic ventilation system according to any one of claims 1 to 5, wherein the opening amount of the manual ventilation port (30) is guided by notifying a user of the value of the scale (33) corresponding to the opening amount of the manual ventilation port. Gas concentration measuring means (50) for measuring the gas concentration in the chamber for a predetermined type of gas;
Gas concentration determination means (615) for determining whether or not the gas concentration exceeds a predetermined threshold,
When the gas concentration determination means (615) determines that the gas concentration exceeds a predetermined threshold value, the notification means (650) requires the manual ventilation necessary to bring the gas concentration below the threshold value. The automatic ventilation system of Claim 6 which alert | reports the value of the said scale (33) corresponding to the opening amount of a mouth (30) to a user.   The automatic ventilation system according to claim 7, wherein the type of gas is carbon dioxide.   An air conditioner comprising the automatic ventilation system according to any one of claims 1 to 8.   A freezing apparatus provided with the automatic ventilation system in any one of Claims 1-8.

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