JP3219452B2 - Abnormal situation storage type controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormal situation detecting type control device provided with a detecting function for detecting an abnormal situation and a control function for controlling each required operation.

[0002]

2. Description of the Related Art As an example of this type of apparatus, there is an ice making apparatus 100 as shown in FIG. 3, in which an ice making room 2 having an uneven surface is opposed to an ice making room 1. In the meantime, a cooling pipe 3 is provided, and an ice making water sprinkler 4 for sprinkling water for ice making on the surface of the ice making plates 2.2, 2 'above the ice making plates 2, 2', and ice pieces 10 made of ice. And an ice-separating water sprinkler 5 for flowing de-icing water for de-icing to the back of the ice making plates 2 and 2 '.
After collecting water in the water storage tank 7, the pump motor 9
The water is returned to the ice sprinkler 4 via the pipe 8 by the pump 9 driven by A.

An ET sensor 60 is provided on the ice making plate 2.2 or at a portion where the temperature changes in accordance with the temperature of the ice making plate 2 or 2 ', for example, by providing an ET sensor 60 in the refrigerant pipe 12 so as to reduce the temperature of the refrigerant. Is detected, the temperature condition of the ice making plates 2 and 2 'is detected.

[0004] The ice storage chamber 24 is provided with a door 22 for taking out the stored ice chips 10, and an ice storage sensor 61 is provided near the falling point of the ice chips 10 to store the ice chips 1 stored therein.
It is detected that the amount of 0 has reached the predetermined amount.

In the machine room 11, a cooling pipe 3 is connected to a refrigerant pipe 12.
Compressor 13 for providing cooling via compressor 13A Compressor motor 13A Condenser 14 Condenser fan 1
5. Condensing / cooling unit 17 including fan motor 15A / capillary tube 16, hot gas circuit for assisting refrigeration cycle, and hot gas valve 1 provided in the circuit
9 and an attached part 23 such as a water supply valve 21 provided in a water supply pipe 22 for supplying water to the ice breaker sprinkler 5. In addition,
The hot gas valve 19 and the water supply valve 21 are solenoid valves and are electrically controlled.

The microcomputer 70 uses the control information detected by the ET sensor 60 and the ice storage sensor 61 and time information obtained by a timer (not shown) to determine each part necessary for ice making and ice storage in FIG. Control is performed according to a processing procedure according to a control operation flowchart.

The control according to the flowchart of FIG. 4 operates in the following steps when the power is turned on. Step A: Cleaning Step The compressor motor 13A, the water supply valve 21, and the pump motor 9A are operated to perform cleaning for a predetermined time (for example, one minute), and then proceed to an ice making step.

Step B: Ice Making Process The compressor motor 13A, the pump motor 9A, and the fan motor 15A are operated, and the water supply valve 21 and the hot gas valve 19 are stopped to operate.

Step C: Ice Making Cycle The ice making plates 2.2 ′ are cooled until the ET sensor 60 reaches a first predetermined temperature (for example, 0 ° C.). This cooling time is defined as T1.

Step D After the ET sensor 60 reaches the first predetermined temperature, the ice making plates 2 and 2 'are cooled until the ET sensor 60 reaches the second predetermined temperature (for example, -10 ° C.). .

Step E: Fuzzy Inference When the ET sensor 60 reaches the second predetermined temperature, fuzzy inference is performed to determine the remaining ice making time T3, the ice separation completion detection temperature, the water supply time, and the like.

Step F: The ice making operation is continued until the remaining ice making time T3 elapses.
After three lapses, the process moves to the ice-removing step.

Step G: Ice release process The compressor motor 13A, the water supply valve 21, and the hot gas valve 19 are operated, and the pump motor 9A and the fan motor 15A are stopped.

Step H: Full ice check Wait for the water supply time obtained in step E. After that, stop the water supply valve 21 and wait until the ET sensor 60 reaches the ice separation completion detection temperature. It is checked whether the ice storage sensor 61 has detected a full ice state.

Step I If the ET sensor 60 has reached the deicing completion detection temperature determined in Step E before the water supply time has elapsed, the water supply valve 21
It is checked whether or not the ice storage sensor 61 detects the full ice state while keeping the operation.

{Circle around (1)} Step J: Step Transition If the check indicates that the ice is not full, the procedure shifts to the ice making step of step B.

Step K: Ice Storage Step The compressor motor 13A, hot gas valve 19, water supply valve 21, pump motor 9A, fan motor 15A are stopped, and the control operation of the apparatus is stopped.

Step L: Restart When the ice storage sensor 61 no longer detects the full ice condition,
It moves to the ice making process of step B.

Apart from the ice making control operation according to the above flow chart, when the compressor motor 13A is overloaded, an overload breaker 80 that cuts off its electric circuit, and a cooling function part, for example, the ice making plates 2 and 2 'are provided. Temperature sensor 25
To detect that the required portion has been overheated, and to stop the required functional portion, for example, to shut off the power supplied to the compressor motor 13A.
0 is provided, and a signal obtained at the time of these abnormalities is controlled by the control unit 26 in the electrical component box 18 to control the abnormal operation.

The above-described ice making machine 100 is disclosed in Japanese Patent Application Laid-Open No. Hei 1-200168 filed by the present applicant.

[0021]

In the above-described conventional ice making machine, when the operation at the time of abnormality is started, for example,
An alarm when the overload circuit breaker 80 or the overheat prevention circuit breaker 90 is activated causes the user to turn off the main power switch, or disconnect the outlet and remove the primary power supply, that is, 1
Since the power supply path of the commercial power supply such as 00 volt 60 cycle is cut off, the maintenance worker inspects the overload circuit breaker 8
Since the built-in abnormal operation parts such as the zero and the overheat prevention circuit breaker 90 have returned to the same state as the apparent recovery, the operation is performed again until the abnormal state occurs in order to find the abnormal part. There is a disadvantage that it must be done.

For this reason, it is conceivable to provide a configuration in which, during the operation of the abnormal operation section, abnormal information indicating the abnormal situation is displayed, but the user turns off the main power switch or sets the outlet. If you have missed
When the primary power is turned off, the display of the abnormality information disappears, and similarly, it takes time to find an abnormal part.

Therefore, it is conceivable that the abnormality information is stored and held. However, when the primary power supply is turned off, the abnormality information is generated, and the secondary power supply which continues for a short time even if there is no abnormality is generated. As a result, the abnormal information is stored and held, so that a problem that a normal abnormal situation cannot be determined occurs.

For this reason, there is a problem that it is desired to provide such an inconvenient device with a simple configuration.

[0025]

According to the present invention, there is provided a control device provided with a portion for detecting the above-mentioned abnormal condition and obtaining the abnormal information and a control portion for controlling the operation of each required portion.
A secondary power source which is maintained for a predetermined time after the interruption of the secondary power source is obtained from the primary power source, and a control unit power supply means for operating the control unit using the secondary power source, and the above-mentioned primary power source based on the primary power source An abnormality information storage means for detecting an abnormality state and, when abnormality information is obtained, providing abnormality information storage means for storing the abnormality information in a storage holding section after delaying the abnormality information by a time longer than the predetermined time. An object of the present invention is to solve the above problem by providing an apparatus.

[0026]

[Function] The abnormality information detected based on the primary power supply is
Since the abnormality is stored in the abnormality information storage unit after being delayed by a predetermined time during which the next power source is maintained, there is no abnormality information, and 1
If the abnormality information is generated because the next power supply is turned off, the secondary power supply that operates the control unit disappears during the time when the abnormality information is delayed, so that the abnormality information is not stored. There will be no abnormalities. On the other hand, if there is regular abnormality information, even if the abnormality information is delayed, the primary power is not turned off and there is a secondary power supply for writing the abnormality information. It can be stored in the storage unit. Therefore, even after the primary power supply is turned off, the normal abnormal state is stored in the stored contents, so that the maintenance worker can check the abnormal state based on the stored contents.

[0027]

An embodiment will be described below with reference to FIGS.
In each figure, the portions indicated by the same reference numerals as those in FIG. 3 are portions having the same functions as those described in FIG.

The outlet 51 is a connection plug for connecting to a primary power supply from the commercial power supply 200, and the power switch 52 is a base plug for supplying the primary power supplied through the outlet 51 to each unit of the apparatus. It is a switch, and the primary power supplied to each unit of the apparatus is cut off even when the outlet 51 is unplugged or the power switch 52 is turned off.

The compressor start relay R0 is arranged in a circuit for supplying primary power to the compressor motor 13A, and is driven by the control relay R1 via the overheat control relay R6. The microcomputer 70 drives the control relay R1. Opening / closing is controlled.

The overload circuit breaker 80 is a circuit breaker that detects a current equal to or greater than a predetermined value and cuts off the electric circuit. For example, the overload circuit breaker is an overcurrent interruption relay, and is connected in series with the electric circuit of the primary power supply to be supplied to the compressor motor 13A. When the current of the compressor motor 13A exceeds a predetermined value, the circuit is opened and cut off from the primary power supply.

The overload abnormality information 80A due to compressor overload is obtained by detecting that a voltage is generated between points A and C of the overload breaker 80 when the compressor start relay R0 is in a closed state. Signal.

The control relay R1 drives the compressor start relay R0 via the overheat control relay R6.
Opening and closing control is performed by the microcomputer 70.

The overheat prevention circuit breaker 90 detects that the temperature of the ice making plates 2 and 2 'has become abnormal by the temperature sensor 25, cuts off the electric circuit of the overheat control relay R6, and switches the compressor start relay R0. The circuit is opened, and the primary power supplied to the compressor motor 13A is cut off.

The overheat abnormality information 90A due to the overheat abnormality is a signal obtained by detecting that a voltage is generated between the points B and C of the overheat prevention circuit breaker 90 when the control relay R1 is in the closed state. is there.

The control relays R2, R3, R4, and R5 are arranged in circuits that supply primary power to the fan motor 15A, the hot gas valve 19, the water supply valve 21, and the pump motor 9A, respectively. Computer 7
It is opened and closed by the control operation of 0.

In the secondary power supply circuit section 55, an AC voltage obtained by lowering the primary power supply through a transformer 56 is supplied to a rectifier circuit 57.
And a circuit for obtaining a low-voltage DC voltage to obtain a secondary power supply. The secondary power supply is connected to a control / display unit such as a microcomputer 70 and a display 75 and an abnormality information memory 7.
2 The abnormality information memory 72 is a backup memory, and its storage is held by a power supply stored in a capacitor.

The rectifier circuit 57 in the secondary power supply circuit section 55 is provided with a portion for storing the power of the secondary power supply in a relatively large-capacity capacitor.
The secondary power supply can be maintained for a small amount of time, for example, a predetermined time of about several hundred ms.

Each information input of measurement information from the ET sensor 60 and the ice storage sensor 61 to the microcomputer 70, abnormality information based on the overload abnormality information 80A and the overheat abnormality information 90A, control output for each operation part, and display The display output to 75 is performed via the input / output port 53.

The microcomputer 70 comprises an arithmetic processing circuit 70A, a processing memory 71, a timer 73, a data memory 74, an input / output port 53, and the like.

The microcomputer 70 counts the control processing according to the flowchart of FIG. 4 stored in the processing memory 71 based on the measurement information from the ET sensor 60 and the ice storage sensor 61 and the contents stored in the data memory 74. In addition to the processing based on the time information of the timer 73, the abnormality information storage processing according to the abnormality information storage flowchart of FIG. 2 stored in the processing memory 71 is performed in addition to the above-described information, the overload abnormality information 80A and the overheat abnormality information 90A. The abnormality information is stored in the abnormality information memory 72 by taking the abnormality information into the data memory 74 and processing it.

The storage operation according to the abnormality information storage flowchart of FIG. 2 is inserted between each step of the flowchart of FIG. 4 or between appropriate steps, and operates by the following steps.

Step a: Overload abnormality check It is checked whether there is overload abnormality information 80A.

Step b: Information Delay When there is the overload abnormality information 80A, the information is delayed by a predetermined time (a time longer than the time that the secondary power supply can be maintained after the primary power supply is turned off).

Step c: Information storage The abnormality information based on the overload abnormality information 80A is written and stored in the abnormality information memory 72.

Step d: Overheat abnormality check It is checked whether there is overheat abnormality information 90A.

Step e: Information delay When there is overheating abnormality information 90A, a predetermined time (a time longer than the time that the secondary power supply can maintain after turning off the primary power supply)
Just delay.

Step f: Information storage The abnormality information based on the overheat abnormality information 80A is written and stored in the abnormality information memory 72.

Step g: Stopping the control operation All the control target parts are stopped, and the display 75
Displays the contents stored in the abnormality information memory 72.

The display 75 is a display for displaying the contents of the abnormality information in characters, for example, a liquid crystal character display.

When the primary power is turned on again after the primary power is turned off by the outlet 51 or the power switch 52, the microcomputer 70 first checks whether the abnormality information is stored in the abnormality information memory 72. When the abnormality information is stored, the abnormality information is given, and the operation is restarted again.

The present invention has the following points.
A portion for obtaining abnormal information by detecting an abnormal condition such as overload of a compressor motor or overheating of a required portion in a cooling function, that is, overload abnormality information 80A / overheating abnormality information 9
Abnormal condition detection provided with a part for obtaining 0A and a microcomputer 70 for controlling operations of required parts such as a fan motor 15A, a hot gas valve 19, a water supply valve 21, and a pump motor 9A, that is, a control unit. The type control device, after the primary power supply is cut off, for a predetermined time, for example, depending on the capacity of the capacitor, as in the secondary power supply circuit section 55, for example,
A secondary power supply that lasts for about several hundred ms is obtained from the primary power supply, and a control unit, that is, a control unit power supply unit for operating the microcomputer 70 is provided by the secondary power supply. Overload abnormality information 80
A and an abnormal situation such as the overheat abnormal information 90A are detected, and when the abnormal information is obtained, the abnormal information is delayed by a time longer than the above-mentioned predetermined time, and then stored in the storage unit, that is, the abnormal information storage. It can be seen that the component provided with the abnormality information storage means stored in the memory 72 is a component.

[Modification] The present invention can be modified as follows.

(1) The present invention is applied to a control device other than an ice making device, such as a refrigerator, a dishwasher, and a frozen food showcase.

(2) The present invention is applied to a configuration in which one or both of the overload breaker 80 and the overheat prevention breaker 90 are connected in series with the power switch 52 to shut off the entire primary power supply.

(3) In a configuration in which a backup memory is provided in the microcomputer 70, the backup memory also serves as the abnormality information memory 72.

(4) The abnormality information memory 72 is constituted by one stored and held by a rechargeable battery.

(5) The abnormality information memory 72 is constituted by a ROM with a connector, and the storage of the abnormality information is constituted by a ROM writing function.
It is configured to be replaced with OM.

(6) A connector is provided between the input / output port 53 and the display 75, and the connector is always disconnected so that the display 75 is not provided. And monitor it.

(7) The control function of the microcomputer 70, that is, the control unit is configured as a control unit having a discrete logic circuit configuration.

(8) To store the abnormality information in the abnormality information memory 72 without the control of the microcomputer 70, the abnormality information memory 72 is provided with an independent writing circuit and a timer which are operated by the secondary power supply. It is configured to write the abnormal information by a signal delayed by a predetermined time obtained from the timer after the interruption of the next power supply.

[0061]

According to the present invention, as described above, the abnormality information detected based on the primary power supply is stored in the abnormality information storage unit after being delayed by a predetermined time during which the secondary power supply is maintained. However, if the primary power is turned off without any abnormal information and the abnormal information occurs, the secondary power for writing the abnormal information disappears during the time when the abnormal information is delayed. Abnormal information is not stored, and
When there is regular abnormality information, even if the abnormality information is delayed, the primary power is not turned off, and the secondary information still exists, so that the abnormality information can be stored in the storage unit.

Therefore, what can be maintained by the maintenance worker based on the stored contents can be provided by a simple and inexpensive device which simply adds a configuration for storing and holding the abnormal information with a delay of a predetermined time. There are features such as.

[Brief description of the drawings]

 The drawings show the embodiments, and the contents of each drawing are as follows.

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a flowchart of an operation of a main part of the present invention.

FIG. 3 is a block diagram of a conventional technology.

FIG. 4 is a flowchart of a processing operation according to the related art.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 ice making room 2 ・ 2 ′ ice making plate 3 cooling pipe 4 ice making water sprinkler 5 ice sprinkler 6 water receiving gutter 7 water storage tank 9 pump 9A pump motor 10 ice piece 11 machine room 12 refrigerant pipe 13 compressor 13A compressor motor 14 Condenser 15 Condenser fan 15A Fan motor 16 Capillary tube 17 Condensation cooling unit 18 Electrical box 19 Hot gas valve 21 Water supply valve 22 Water supply pipe 23 Auxiliary unit 24 Ice storage room 24A Door 25 Temperature sensor 26 Control unit 60 ET sensor 61 Ice storage sensor 80 Overload circuit breaker 90 Overheat prevention circuit breaker 100 Ice making device 200 Required power supply R0 Compressor start relay R1 to R5 Control relay R6 Overheat control relay 51 Outlet 52 Power switch 53 Input / output port 55 Secondary power supply circuit section 56 Transformer 57 Rectification Circuit 70 micro Computer 70A arithmetic processing circuit 71 processes the memory 72 the abnormality information memory 73 timer 74 data memory 75 Display 80A load abnormality information 90A overheating abnormality information

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hideyuki Katayanagi 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A 1-234769 (JP, A) JP-A Heisei JP-A-3-259398 (JP, A) JP-A-3-260571 (JP, A) JP-A-58-133880 (JP, U) JP-A-63-101766 (JP, U) JP-A-1-140472 (JP, A) U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25C 1/00-5/18 G08B 19/00-31/00

Claims (1)

(57) [Claims] 1. A control device provided with a part for detecting an abnormal situation and obtaining abnormal information and a control unit for controlling the operation of each required part, wherein the secondary part continues for a predetermined time even after the primary power supply is cut off. Power supply 1
A control unit power supply unit for operating the control unit with the secondary power supply, detecting the abnormal situation based on the primary power supply, and obtaining the abnormality information when the abnormality information is obtained. And an abnormality information storage means for storing the information in the storage holding unit after delaying the time by a time longer than the predetermined time.