JP2005156113A - Cooling unit and refrigerator using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller for a cooling unit of high versatility and serviceability regarding the cooling unit and a refrigerator using the cooling unit. <P>SOLUTION: The controller has a main control part, an auxiliary control part, a control data storage memory and an extended communication connection part. The main control part and the auxiliary control part are connected in a two-way communicable manner by a communication line, and the extended communication connection part is installed on the communication line to allow two-way communication with the main control part. The main control part performs cooling control of the cooling unit using a parameter in the control data storage memory, and since data in the control data storage memory can be rewritten by an external control part, the controller for the cooling unit with high versatility and serviceability can be realized. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooling unit and a refrigerator using the same.

  Conventionally, this type of cooling unit and a refrigerator using the same have been developed as a result of electronic control such as inverter control of a compressor, DC fan motor, and temperature sensing of each part of the refrigerator by a sensor. It is very difficult to easily know the rotational speed of the compressor. Moreover, as the multifunctionalization of refrigerators has progressed, a large number of sensors are required, resulting in various problems such as an increase in wiring materials and an increase in manufacturing man-hours. As a measure to solve this problem, for example, with respect to the wiring in the refrigerator, it is possible to transmit / receive control information using a communication line and connect a detachable terminal from the conventional method of directly connecting parts with individual lines. There exists what displays a refrigerator status data on the display part of a terminal device (for example, refer patent document 1).

  FIG. 7 shows a block diagram of a conventional refrigerator-freezer control device. In FIG. 7, reference numeral 1 denotes a refrigerator storage room, and a compressor 5, a condenser 6, a decompressor 7, and an evaporator 8 constitute a refrigeration cycle. The condenser 6 is cooled by a condenser fan 9 in order to promote condensation of the high-temperature and high-pressure gas refrigerant sent from the compressor 5. An evaporator fan 10 is installed to circulate the air cooled by the evaporator 8 into the storage chamber 1. The storage chamber 1 is provided with an internal temperature sensor 12 for detecting the internal temperature.

  In the main control unit, the internal temperature detection means 17 that electrically converts and outputs the output of the internal temperature sensor 12, and the internal temperature detected by the internal temperature detection means 17 has reached the set temperature. The internal temperature determining means 46 for determining whether or not, and the I / F circuit A22 that converts the output from the internal temperature determining means 46 into an electrical communication signal and transmits / receives it.

  The sub-control unit includes an I / F circuit B38 that transmits and receives a communication signal with the I / F circuit A22, and compressor control means 39 that controls the operation of the compressor 5 based on the signal from the I / F circuit B38. Yes. The I / F circuit A22 and the I / F circuit B38 are connected by a communication line 43. The communication line 43 is connected to a terminal device 47 having an I / F unit, a display unit, and a key input unit. A connection 48 is provided.

  About the cooling unit comprised as mentioned above and the refrigerator using the same, the operation | movement is demonstrated using the flowchart of FIG.

  First, in the main controller, when the internal temperature detection means detects the internal temperature by the internal temperature sensor (STEP 401), the internal temperature determination means determines whether or not the internal temperature has reached the set temperature (STEP 402). . Then, the I / F circuit A converts the determination result into electrical communication data and transmits it to the sub-control unit (STEP 403).

  The I / F circuit B of the sub control unit receives communication data from the main control unit (STEP 501). The compressor control means converts the communication data into a judgment result of the internal temperature, and controls the compressor based on this result (STEP 503). After that, when the I / F circuit B converts the operation / stop state of the compressor into communication data and transmits it to the main control unit (STEP 504), the I / F circuit A of the main control unit transmits the communication data from the sub control unit. Is received (STEP 404). Next, a command reception confirmation (STEP 405) is performed from the terminal device. If the command from the terminal cannot be received (when the terminal is not connected or there is no operation by key input, etc.), the process returns to STEP 401.

Next, a case where a terminal is connected will be described. When the terminal device is connected to the communication line, the terminal device stands by (STEP 601) until there is a key input. Here, when the key input for confirming the state of the refrigerator is made, a refrigerator state transmission request command is transmitted to the main control unit (STEP 602). At this time, the main control unit receives a refrigerator status transmission command from the terminal (STEP 405), transmits status data of various refrigerators to the terminal device (STEP 406), and then returns to STEP 401. On the other hand, when receiving the refrigerator status data from the main control unit, the terminal device edits the data to display the received data (STEP 604), displays the data on the display unit (STEP 605), and returns to STEP 601.
JP-A-6-94344

  However, in the configuration as described above, the state of the refrigerator can be confirmed by the terminal device connected to the communication line, but it is impossible to rewrite the control parameters for controlling the refrigerator from the terminal device. In commercial refrigerators mainly used in restaurants and the like, the installation environment such as the size and layout of the kitchen, and the usage state vary greatly depending on the user.

  Therefore, if the control specifications are the same for all users, for example, in the environment where the refrigerator is installed adjacent to the water heater, there is a problem that the surface of the refrigerator is condensed due to the influence of steam from the water heater. Therefore, the energization time of the anti-condensation heater is lengthened to prevent dew condensation, or the use state of the heated food is frequently stored in the storage, so that the inside of the storage tends to cool down due to abnormal frost formation. It is necessary to deal with various problems, such as shortening the defrost control cycle and defrosting the cooler to avoid slow cooling. Therefore, a long working time such as replacement to a control board is required, and there is a problem that a smooth service response is not possible.

  In addition, when selling to an external manufacturer as a cooling unit, there is a high possibility that the same control specifications cannot be used if there is more than one company, such as from the manufacturer's product lineup, or different control specifications. It was necessary to develop a cooling unit having a substrate, and there was a problem that an increase in development load and model management according to specifications were required at the manufacturing stage.

  The present invention solves the above-described conventional problems, and provides an improvement in serviceability when a problem occurs, a cooling unit that can be handled by the same controller in a wide variety of models, and a refrigerator using the same. Objective.

  In order to solve the above conventional problems, a cooling unit of the present invention and a refrigerator using the same have a sub-control unit connected so as to be capable of bidirectional communication with the main control unit, and the main control unit includes A control data storage memory storing control parameters for controlling the load of the refrigerator, control data reading means for reading data from the control data storage memory, and control data for storing data read from the control data storage memory A storage unit; load control determining means for determining a control state of each load of the refrigerator; and an I / F circuit A for converting the load control state determined by the load control determining means into an electrical communication signal and transmitting the electrical communication signal. The sub-control unit has an I / F circuit B that transmits and receives communication signals to and from the I / F circuit A of the main control unit.

  By attaching a control data storage memory that stores model-specific parameter data to various types of control boards, a highly versatile cooling unit and a refrigerator controller using the same can be realized. Different models can be controlled with the same control board.

  In addition, the cooling unit of the present invention and the refrigerator using the cooling unit can be connected to the external control unit so that bidirectional communication with the main control unit is possible on the communication line between the main control unit and the sub-control unit. And the control data writing means for writing the data in the control data storage memory, the external control unit is connected even after the control board or the refrigerator is assembled or after the refrigerator is installed in the user's house. As a result, the data in the control data storage memory can be rewritten.

  The cooling unit of the present invention and a refrigerator using the cooling unit can be developed on the same control board by attaching a control data storage memory storing individual control parameters to a wide variety of models. Thus, the development load can be reduced, and management board management costs for each model are not required in terms of manufacturing, so that control board management costs can be reduced.

  Even after installing the product in the market, it is possible to rewrite the data in the control data storage memory by connecting an external control unit, and to tune to the optimal control according to the user's request, usage environment or usage status. Serviceability can be improved.

  The invention according to claim 1 is capable of bidirectional communication with a cooling cycle constituted by a compressor, a condenser, a decompressor, and an evaporator, a main control unit that controls a cooling state, and the main control unit. A control data storage memory storing control parameters for controlling the load of the refrigerator, and control data reading means for reading data from the control data storage memory A control data storage for storing data read from the control data storage memory, load control determining means for determining the control state of each load of the refrigerator, and the load control state determined by the load control determining means An I / F circuit A that converts and transmits the communication signal, and the sub-control unit includes an I / F circuit B that transmits and receives a communication signal to and from the I / F circuit A of the main control unit, Above Compressor control means for controlling the operation of the compressor based on the signal from the / F circuit B, and the main control unit controls the cooling state by the data stored in the control data storage memory, thereby variously By using a control data storage memory that stores individual control parameters for various models, it is possible to cope with the same control board, so the development load can be reduced at the control development stage. Since control board management for each model is not required, control board management costs can be reduced.

  The invention according to claim 2 includes an extended communication connection unit on the communication line between the main control unit and the sub control unit so that an external control unit capable of bidirectional communication with the main control unit can be connected. A second sub-control unit can be added to the communication connection unit, and the load that can be controlled by the main control unit can be easily increased, so the versatility of the control board having the main control unit is improved. .

  In the third aspect of the invention, since the sub control unit drives the compressor as instructed by the main control unit, if the communication form (communication protocol) instructed to the sub control unit is the same, the sub control unit The sub-control unit can be subordinate to the main control unit, and a highly versatile sub-control unit can be realized.

  According to a fourth aspect of the present invention, the main control unit has control data writing means for writing data in the control data storage memory, and the external control unit stores data to be written in the control data storage memory of the main control unit. Since it has an I / F circuit C that converts the data of the transmission data storage unit and the transmission data storage unit into an electrical communication signal and transmits it to the main control unit, an external control unit is connected to the extended communication connection unit, Since the data in the control data storage memory can be written, the data in the control data storage memory is written in the data for each model after the board assembly is completed or the refrigerator assembly is completed for the same control board in the manufacturing process. Therefore, production efficiency can be increased.

  Since the control data storage memory can rewrite the stored data, the control of the refrigerator can be changed by changing the data in the control data storage memory. Can be easily customized, and it is possible to provide products with unique control specifications that match user-specified specifications.

  According to the sixth aspect of the present invention, since the main control unit sends an instruction to rewrite data in the control data storage memory and rewrite data, rewriting of the contents of the control data storage memory is permitted only to the main control unit. Thus, it is possible to prevent the data from being rewritten due to, for example, and to prevent the control state from becoming abnormal due to the rewriting of data by the sub-control unit.

  In the invention according to claim 7, when the control data abnormality detecting means for detecting abnormality of the data read from the control data storage memory is detected in the main control unit, and the control data abnormality detecting means detects the abnormality of the control data, Since the cooling state is controlled by preset control default data, even if the control data cannot be obtained due to a failure of the control data storage memory, etc., control is performed using the default data, thus avoiding a state in which cooling control cannot be performed. I can do it.

  According to the eighth aspect of the present invention, a personal computer is connected as an external control unit, and the data in the control data storage memory can be easily rewritten by the communication function of the personal computer. It becomes possible to tune to the optimal control according to the data change and the installation environment or the use state according to the request of the service, and the serviceability can be improved.

  According to the ninth aspect of the present invention, since the control data storage memory is a ROM in which stored data can be rewritten, control data is retained even when the power is turned off. It is possible to return to the same control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a block diagram of a cooling unit and a refrigerator using the same according to Embodiment 1 of the present invention, and FIG. 2 is a schematic diagram of the cooling unit according to the embodiment and a refrigerator using the same. .

  1 and 2, the food storage 1 is composed of an outer wall 2 into which a heat insulating material is injected, a door 3, and a cooling unit 4 installed on the top surface. The cooling unit 4 is equipped with a brushless DC motor that compresses a gaseous refrigerant, and an inverter compressor 5 that can vary the driving speed, a condenser 6 that condenses the gaseous refrigerant, and a decompression that reduces the pressure of the liquid refrigerant. The condenser 7 and the evaporator 8 for evaporating the liquid refrigerant and the condenser 6 are cooled, the condenser fan 9 for promoting the condensation of the high-temperature and high-pressure gas refrigerant sent from the compressor 5, and the evaporator 8 The evaporator fan 10 that blows air cooled by the heat of vaporization taken away when the refrigerant evaporates into the storage and the condenser 6 are brought into contact with the condenser 6 to detect the condensation temperature of the refrigerant to set the condensation temperature. When the value is higher than the value, the condensing temperature sensor 11 provided to prevent the compressor from malfunctioning by limiting the maximum number of revolutions and the minimum number of revolutions of the compressor 5 and the inside of the storage for detecting the internal temperature of the storage 1 A temperature sensor 12; A defrosting heater 13 for removing the frost on the serial evaporator is constituted by a defrosting ending temperature sensor 15 for detecting the completion of the defrosting control.

  In the present embodiment, the condenser fan 9 and the evaporator fan 10 employ DC motors whose rotation speed can be varied by an applied voltage. However, AC motors having a constant speed may be used. Further, in this embodiment, each of the condenser fan and the evaporator fan is configured as one unit, but there is no problem even in a cooling unit using a plurality of units. The outside air temperature sensor 15 detects the environmental temperature where the cooling unit and the refrigerator are installed. Next, components of the main control unit 16 will be described.

  The internal temperature detecting means 17, the condensing temperature detecting means 18, the defrosting end temperature detecting means 19 and the outside air temperature detecting means 20 electrically convert and output the outputs of the corresponding sensors, respectively. 21 counts the energization time from the time of turning on the power or the elapsed time from the end of defrosting. The I / F circuit A 22 is an interface circuit that transmits and receives electrical communication data between the sub-control unit 23 and the external control unit 24.

  The reception data discrimination means 25 discriminates whether the communication data received by the I / F circuit A22 is the sub control unit state data transmitted from the sub control unit 23 or the data transmitted from the external control unit 24. When the data received by the I / F circuit A22 is sub-control unit state data, the sub-control unit state detection unit 26 determines the control state of the sub-control unit 23 (for example, the rotational speed of the compressor in this embodiment). To detect.

  The control data storage unit 27 has parameters necessary for cooling control (for example, the internal temperature at which the compressor is driven, the drive voltage of the evaporator / condenser fan, the defrost control cycle, etc.). Stored. The load control determining unit 28 is configured to output the output results from the temperature detecting units, the state detection result of the sub-control unit, and the value stored in the control data storage unit 27 (for example, the internal temperature at which the compressor is in a driving state). And the control state of the compressor 5, the condenser fan 9, the evaporator fan 10, and the defrosting heater 14 are determined based on the driving voltage of the evaporator fan / condenser fan, the defrosting control cycle, and the like. Each load is controlled by the fan control means 29, the evaporator fan control means 30, and the defrost heater control means 31.

  The I / F circuit A 22 converts the control state of the compressor 5 determined by the load control determination means 28 into an electrical communication signal and transmits it to the sub-control unit 23. The control data storage memory 32 is an EEPROM in which stored data can be read and rewritten by an electrical signal, and various parameter values for performing cooling control as shown in FIG. 3 are stored at predetermined addresses. Is set to minimize power consumption in general installation environments and usage conditions.

  Further, since this memory is an EEPROM, stored data can be retained even when the power supply of the main control unit 16 is cut off. Although an EEPROM is used in this embodiment mode, any memory can be used as long as it can hold stored data even when the power is cut off. Even when a volatile memory (RAM) is used, the same effects as in the present embodiment can be obtained if a power source for data backup is provided.

  The control data reading means 33 reads data in the control data storage memory 32, and starts reading data when the data read timing is reached by the data read event generating means 34. In the present embodiment, the data read event occurs at the timing when the main control unit is turned on, when the data in the control data storage memory is changed, and at an arbitrary timing (for example, when the compressor is stopped, It occurs periodically at a fixed period by a timer count).

  Here, the purpose of reading the data in the EEPROM by periodically generating a data reading event is to perform a RAM refresh as a countermeasure against data corruption of the stored data in the control data storage unit 27 due to noise or the like. The control data abnormality detecting means 34 detects whether or not the data read from the control data storage memory 32 is abnormal by the control data reading means 33. If there is no abnormality, the data read into the control data storage section 27 is detected. 4 is stored at a predetermined address, and when abnormality is detected, abnormal data is specified, and the data portion having abnormality is stored in advance in the control default data storage unit 36 as control data storage unit. 27.

  If all data is abnormal due to mounting failure or failure of the control data storage memory 27, all default data is stored in the control data storage unit 27 as a control data storage memory abnormality. The data writing means 37 determines whether the received data discrimination means 25 receives the communication data transmitted from the sub-control section 23 received by the I / F circuit A22, or receives the data content rewrite command of the control data storage memory. In the case of the control data rewrite command, the data content of the control data storage memory 32 is rewritten.

  The sub-control unit 23 also includes an I / F circuit B38 that transmits and receives communication signals with the I / F circuit A22, compressor control means 39 that controls the compressor, and compressor state detection means that detects the driving state of the compressor. The external control unit 24 has an I / F circuit C41 that transmits and receives a communication signal with the main control unit, an input unit 42 that inputs data to be written in the control data storage memory, and transmission data that stores the input data. It is a terminal device such as a personal computer having a storage unit 43.

  In addition, the main control unit 16 and the sub control unit 23 and the external control unit 24 are connected by a communication line 43 so that the external control unit 24 is detachable between the main control unit 16 and the external control unit 24. An extended communication connection unit 44 is provided. As a result, by connecting a personal computer to the external connection unit and inputting rewrite data in the control data storage memory by key input, it is possible to tune to control specifications that match the installation environment and usage conditions after product installation. Become.

  In addition, a second sub-control unit (not shown) can be connected to the extended communication connection unit, and a load (for example, a second compressor) controlled by the second sub-control unit in the load control unit. By determining the driving state and transmitting it as a communication signal to the second sub-control unit by the I / F circuit, it is possible to add a load (in this embodiment, a compressor) that can be easily controlled by the main control unit.

  About the cooling unit comprised as mentioned above and a refrigerator using the same, the operation | movement is demonstrated using FIG.1 and FIG.3.

  First, when the main control unit 16 is powered on, a data read event is generated in the data read event generating means 34, and a control data reading subroutine is called (STEP 101). In the control data reading subroutine, the data in the control data storage memory 32 is read by the control data reading means 33 (STEP 1S), and it is determined whether the data read by the control data abnormality detecting means 35 is abnormal (STEP 2S). If there is no abnormality in the read data, the corresponding data is sequentially stored in a predetermined address of the control data storage unit 27 (STEP 3S), the control data storage memory abnormality flag is cleared (STEP 4S), and then the subroutine is terminated. .

  Next, a case where there is an abnormality in the read control data will be described. The control data abnormality detection means 35 first determines whether there is an abnormality in a part of the read control data or abnormality of all data (EEPROM is not mounted, mounting failure, EEPROM and peripheral circuit failure) (STEP5S), and the data If a part of the data is abnormal, the data read from the EEPROM is stored in a predetermined address of the control data storage unit 27 (STEP 6S), and the data abnormal part corresponds to the control default data storage unit 36. The data indicated by the predetermined address is taken out and stored in the corresponding address of the control data storage unit 27 (STEP 7S), and then the control data storage memory (EEPROM) abnormality flag is cleared (STEP 8S). (For example, if there is an abnormality in the data of “compressor rotational speed 1” stored in EEPROM address 0xXX0 and the data of “evaporator fan drive voltage 1” stored in address 0xM−1, control default The data value 0x28 stored in the data storage unit address 0xT-1 is stored in the control data storage unit address 0xXXX0, and the data value 0x08 stored in the control default data storage unit address 0xW-1 is stored in the control data storage address 0xR-1. And then the subroutine is terminated.

  Further, if there is an abnormality in all data due to the EEPROM not being mounted, mounting failure, or EEPROM failure, all the data in the default data storage unit is stored in the address of the corresponding control data storage unit 27 in STEP 9S. After setting the control data storage memory abnormality flag (STEP 10S), the subroutine is terminated.

  After that, the main control unit 16 returns to the main routine, the temperature detected by the condensation temperature sensor 11, the internal temperature sensor 12, the defrosting end temperature sensor 15, the outside air temperature sensor 14, the count value by the energization time timer 21, and the sub control unit state. From the driving state of the compressor 5 detected by the detecting means 26, the driving state of the condenser fan 9, the evaporator fan 10, the defrosting heater 14, and the load of the compressor 5 is determined by the load control determining means 28, and the condenser fan The corresponding load is controlled by the control means 29, the evaporator fan control means 30, and the defrost heater control means 31 (STEP 102). The determination result of the control state of the compressor 5 is converted into an electrical communication signal by the I / F circuit A22 and transmitted to the I / F circuit B38 of the sub-control unit 23 (STEP 103).

  At this time, the sub-control unit 23 receives the drive speed command of the compressor 5 from the main control unit 16 (STEP 201), and drives the compressor 5 by the compressor control means 39 at the instructed compressor speed (STEP 202). ) Further, compressor state data such as the number of revolutions actually driven by the compressor is detected by the compressor state detecting means 40, converted into electrical communication data by the I / F circuit B38, and sent to the main control unit 16. Transmit (STEP 203). The main control unit 16 recognizes that the communication signal received by the I / F circuit A22 is the data transmitted from the sub-control unit 23 by the received data discrimination unit 25, and the sub-control unit state detection unit 26 detects the compressor signal. A driving state is detected (STEP 104).

  Here, since the sub-control unit 23 only controls the compressor 5 based on the compressor drive command rotational speed obtained from the main control unit 16, any main control unit has a communication rule (communication protocol). If they are the same, the compressor 5 can be driven, and a highly versatile sub-control unit can be realized.

  Next, in STEP 105, it is confirmed whether or not it is the read event timing of the EEPROM stored data. If the event occurrence timing is reached, the read event occurrence flag is set. If it is not the event occurrence timing, the read event occurrence flag is cleared.

  Next, an attempt is made to receive communication data from the external control unit 24 (in this embodiment, a personal computer) (STEP 106). At this time, an instruction to rewrite the data in the control data storage memory and whether or not rewrite data has been received from the external control means 24 are confirmed and judged by the received data discrimination means 25 (STEP 107). If no rewrite data is received, the process proceeds to STEP 110.

  When the control data rewrite instruction and rewrite data are received, the data transmitted from the external control means 24 is rewritten by the data writing means 37 in the control data storage memory 32 (EEPROM) (STEP 108), and then the data read event flag is set. Set (STEP 109) and proceed to STEP 110.

  In STEP 110, if the event flag for reading data in the control data storage memory is not set, the process returns to STEP 102. If it is set, the presence or absence of the control data storage memory abnormality flag is confirmed (STEP 111), and the abnormality flag is set. If YES in step 102, the control data reading subroutine is called (step 112). If the subroutine processing is completed, the process returns to step 102.

  Since the cooling unit configured as described above and the refrigerator using the cooling unit store parameters for performing cooling control in the control data storage memory, various data can be obtained by changing the data in the control data storage memory. Different controls for various models can be handled by the same control board. Thereby, control board management for each model at the time of manufacture can be simplified.

  Since the external control unit can be connected to the extended communication connection unit and the data in the control data storage memory can be written, the data in the control data storage memory is stored on the same control board in the manufacturing process after product assembly is completed. Production efficiency can be increased because it can be written to the model data.

  In addition, since it is possible to rewrite the data in the control data storage memory by connecting a terminal device such as a personal computer to the extended communication terminal part, even after installing the product at the user's home, change the cooling control specification according to the user's request, Tuning to the optimum control specifications according to the installation environment and specification conditions is possible, and serviceability can also be improved.

  In addition, since the main control unit sends instructions to rewrite the data in the control data storage memory and rewrite data, only the main control unit is allowed to rewrite the contents of the control data storage memory. And the control state can be prevented from becoming abnormal due to the rewriting of data by the sub-control unit.

  In addition, when the control data abnormality is detected by the control data abnormality detection means for detecting the abnormality of the data read from the control data storage memory in the main control unit, in order to control the cooling state by the preset control default data, Even when the control data cannot be acquired due to a failure of the control data storage memory or the like, it is possible to avoid a state in which the cooling control cannot be performed such as a continuous stop of the compressor.

  Furthermore, because the control data storage memory uses a ROM that can rewrite stored data, control data is retained even if the power is cut off due to a power failure, etc. It is possible to return to the same control.

  In addition, since the extended communication connection unit can perform bidirectional communication with the main control unit, the load controlled by the main control unit can be increased by connecting the second sub control unit to this terminal unit. Since only the connected load is driven as instructed from the main control unit, it is possible to realize a highly versatile main control unit and sub-control unit that can support various models.

  For the above, the cooling unit according to the present invention and the refrigerator using the same control each load such as the compressor by the control stored data that can rewrite the stored data. It can also be applied to all products having a cooling system, such as a refrigerated / refrigerated showcase used in Japan.

Block diagram of a cooling unit and a refrigerator using the same in Embodiment 1 of the present invention Schematic diagram of a cooling unit and a refrigerator using the same in Embodiment 1 of the present invention The memory map figure of the control data storage memory of the cooling unit in Embodiment 1 of this invention and a refrigerator using the same The memory map figure of the control data storage part of the cooling unit in Embodiment 1 of this invention and a refrigerator using the same The memory map figure of the control default data storage part of the cooling unit in Embodiment 1 of this invention and a refrigerator using the same Operational flow chart of cooling unit and refrigerator using the same in embodiment 1 of the present invention Block diagram of a conventional refrigerator Operation flowchart of a conventional refrigerator

Explanation of symbols

5 Compressor 6 Condenser 7 Depressurizer 8 Evaporator 16 Main Control Unit 22 I / F Circuit A
23 Sub Control Unit 24 External Control Unit 27 Control Data Storage Unit 28 Load Control Determination Unit 32 Control Data Storage Memory 33 Control Data Reading Unit 35 Control Data Abnormality Detection Unit 36 Control Default Data Storage Unit 37 Control Data Write Unit 38 I / F Circuit B
39 Compressor control means 41 I / F circuit C
43 Transmission data storage unit 44 Extended communication connection unit

Claims (9)

A cooling cycle including a compressor, a condenser, a decompressor, and an evaporator; a main control unit that controls a cooling temperature; and a sub-control unit that is connected to the main control unit so as to enable bidirectional communication. The main control unit includes a control data storage memory storing control parameters for controlling the load of the refrigerator, a control data reading means for reading data from the control data storage memory, and a read from the control data storage memory A control data storage unit for storing the data, load control determination means for determining the control state of each load of the refrigerator, and the load control state determined by the load control determination means is converted into an electrical communication signal and transmitted. / F circuit A, and the sub-control unit includes an I / F circuit B that transmits and receives communication signals to and from the I / F circuit A of the main control unit, and a signal from the I / F circuit B. Yo A cooling unit having compressor control means for controlling the operation of the compressor, and the main control unit controls the cooling state based on data stored in the control data storage memory, and a refrigerator using the cooling unit . An extended communication connection unit is provided on the communication line between the main control unit and the sub control unit so that an external control unit capable of bidirectional communication with the main control unit can be connected. And a refrigerator using the same. The sub-control unit drives the compressor according to an instruction from the main control unit, and the cooling unit according to claim 1 and a refrigerator using the cooling unit. The main control unit has control data writing means for writing data in the control data storage memory, and the external control unit connected to the extended communication connection unit transmits data to be written to the control data storage memory of the main control unit. 6. The cooling according to claim 1, further comprising an I / F circuit C that converts data in the data storage unit and the transmission data storage unit into an electrical communication signal and transmits the electrical communication signal to the main control unit. Unit and refrigerator using the same. 4. The cooling unit according to claim 1, wherein the control data storage memory is capable of rewriting stored data, and a refrigerator using the cooling unit. The cooling unit according to any one of claims 1 to 4, and a refrigerator using the cooling unit, wherein the main control unit sends an instruction to rewrite data in the control data storage memory and rewrite data. When there is a control default data storage unit and the main control unit detects an abnormality of the data read from the control data storage memory, and when an abnormality of the control data is detected by the control data abnormality detection unit 7. The cooling unit according to claim 1, wherein the cooling temperature is controlled by preset control default data, and a refrigerator using the cooling unit. The cooling unit according to any one of claims 1 to 7, and a refrigerator using the same, wherein a personal computer can be connected to the external control unit. 9. The cooling unit according to claim 1, wherein the control data storage memory is a ROM capable of rewriting stored data, and a refrigerator using the cooling unit.

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