JP2005300100A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator mounted with a display and control means capable of showing effectively an alarm of requiring for maintenance, a high-efficiency operation by an inverter technique or the like to a user, when using the business refrigerator adopting an energy saving technology such as the inverter technique. <P>SOLUTION: This refrigerator has the display and control means provided with an in-refrigerator-chamber temperature display part 30 chamber by chamber, an operation load display part 31 for displaying a command revolution number to a compressor capable of varying the revolution number by inverter control, as an operation load, and a filter cleaning display part 32 for displaying timing of cleaning for a condenser filter required when a condensing temperature reaches a compression ratio protection zone by clogging of the condenser filter. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigerator that employs an energy saving technique for reducing power consumption.

  In recent years, the tendency to attach importance to the environment has become stronger, and the field of home appliances, especially refrigerators, is a device that keeps turning on electricity from purchase to replacement, and saves a lot of energy for reducing power consumption relative to the environment. Technology has been invented. Among them, the inverter technology is cited as a representative technology. The technology is widespread in the field of household refrigerators, but in reality it is not as widespread in the commercial field as it is for household use. However, in the future, it is easily expected that in the field of business use, as in the case of home use, energy saving that leads to reduction of running costs will be called out. In addition, commercial refrigerators are used more severely than household ones, and maintenance such as cleaning the condenser filter is required.

  Therefore, in order to notify the user of the necessity for maintenance and the like, the refrigerator is equipped with means for displaying the operation state. One example of conventional display means is disclosed in Patent Document 1.

  In the refrigerator in which a plurality of operation functions are set with a plurality of switches, the information disclosed in Patent Document 1 displays information about various operation functions and provides voice notification.

  The conventional display device will be described below with reference to the drawings.

  FIG. 11 is a configuration diagram of a conventional refrigerator display device. The operation panel 40 includes a speed cooling / thawing display 42, a button lock display 43, an energy saving display 44, an audio output display 45, a switching room display unit 46, a timer display unit 47, a refrigerator compartment display unit 48, an ice making unit. A display unit 41 including a display unit 49 and a freezer compartment display unit 50, a speed cooling switch 50, a speed thawing switch 52, a speed freezing switch 53, and a switching chamber setting switch 54 for performing each operation. The timer setting switch 55, the refrigerator compartment temperature setting switch 56, the freezer compartment temperature setting switch 57, and the ice making switch 58 are included.

By providing the display device configured as described above, the refrigerator can be operated by the switches 51 to 58 according to the purpose, and the state of the operated refrigerator is displayed in the display unit 41. This leads to improved visibility and usability for the user.
JP 2002-71259 A

  However, in the field of business use, the above conventional configuration is different from a home refrigerator, and it is more important to cool it better than the ease of use by display, and the display function is rarely recognized as being meaningful and demanded. There were few needs. In addition, the reduction of running cost by energy saving is beneficial for the user, but energy saving by inverter technology has not been achieved.

  The present invention solves the conventional problems, and when using a commercial refrigerator that employs energy-saving technology such as inverter technology, warning of the necessity of maintenance such as cleaning of the condenser filter and high-efficiency operation by inverter technology. It is an object of the present invention to provide a refrigerator equipped with a display and control means that can effectively indicate to the user what is being done.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is a cooling system configured by a compressor, an evaporator, a condenser, and expansion means, and a condenser that detects the temperature state of the condenser in the cooling system. A temperature sensor, control means for determining whether the condenser temperature has reached the compression ratio protection area, and display means for notifying the user of the necessity of cleaning the condenser filter of the cooling system.

  Thereby, when the temperature of the condenser detected by the condenser temperature sensor reaches the compression ratio protection control region, it is possible to inform the user in an easy-to-understand manner whether the condenser filter of the cooling system needs to be cleaned. .

  Further, the refrigerator of the present invention has a plurality of cooling systems, the control means for determining whether the condenser has reached the compression ratio protection area for each cooling system, and the condenser filter for each cooling system. Display means for notifying the user of the necessity of cleaning is provided.

  Accordingly, when the condenser temperature detected by the condenser temperature sensor reaches the compression ratio protection region, it is possible to easily notify the user which cooling system condenser filter needs to be cleaned.

  In addition, the refrigerator of the present invention has a plurality of cooling systems, and among the condenser temperatures of each cooling system, is the condenser temperature of any one of the cooling systems reaching the compression ratio protection region? And a display means for cleaning the condenser filter.

  As a result, it is not necessary to provide a display means for cleaning the condenser filter for the cooling system, and it is sufficient to provide only one display means. Therefore, the cost of the display means can be reduced, and the condenser filter can be provided to the user. The warning of the necessity of cleaning can be notified.

  In addition, the refrigerator of the present invention includes an inverter that changes the rotational speed of the compressor, a control unit that calculates a command rotational speed to the compressor as an operating load in one or a plurality of cooling systems, and a cooling system. Means for displaying the driving load for each is provided.

  Thereby, it is possible to notify the user of the state of each operation load for each cooling system.

  Further, when the refrigerator of the present invention has a plurality of cooling systems, the control means for determining which compressor has the highest command rotational speed in each cooling system, and the highest compressor. One display means for indicating the command rotational speed as the operating load of the entire refrigerator is provided.

  Thus, it is not necessary to prepare a display means for indicating the operating load for the cooling system, and it is sufficient to provide only one display means for indicating the operating load, so that the display means can be reduced in cost and the user can operate the refrigerator. The load can be notified.

  Further, the refrigerator of the present invention compares the predicted operating load and the actual measured operating load with the control means that calculates the command rotational speed to the compressor as the predicted operational load and calculates the actual measured operational load from the signal from the actual compressor. Control means, and a display means for indicating an abnormal warning of the refrigerator at the same time as the operation load in the case of an abnormality in which the difference between the predicted operation load and the actual measurement operation load exceeds a predetermined value. It is.

  As a result, when a difference between the predicted value and the actual operating load exceeds a predetermined value, especially when an unexpected torque is generated in the compressor, the measured operating load is compared to the predicted operating load. By notifying the warning at the same time as the predicted and measured driving load, the user can accurately grasp the state of the refrigerator, effectively maintaining maintenance awareness for energy-saving operation Can be urged.

  The refrigerator of the present invention is provided with a control means for turning off the display means when it is determined that there is no change in the command rotational speed to the compressor for a certain period of time.

  Thereby, the power consumption of the display means can be reduced, and further energy saving can be realized.

  Further, the refrigerator of the present invention is a control means for re-lighting the display means when a change is detected in the command rotational speed to the compressor even after the display means is turned off, or when vibration is detected in the refrigerator body. It is equipped with.

  Thereby, even after the display means is turned off, the user can immediately check the operation state of the refrigerator.

  The refrigerator of the present invention monitors whether the rise in the condenser temperature reaches the compression ratio protection region even in a place where the usage environment is strict such as a commercial refrigerator, and the condenser filter that causes the condenser temperature to rise. Since the display means for warning clogging is provided, it is possible to accurately notify the user of the time for cleaning the condenser filter.

  Further, the refrigerator of the present invention includes a control unit that calculates the command rotational speed to the compressor as an operation load and a unit that displays the calculated operation load. You can grasp the condition.

  The refrigerator of the present invention includes a control unit that turns off the display unit when it is determined that the operating load of the cooling system calculated based on the command rotational speed to the compressor does not change for a certain period of time. Can be reduced and further energy saving can be realized.

  In addition, the refrigerator of the present invention has a control means for relighting the display when the display means is turned off, when a change is detected in the command rotational speed to the compressor, or when the vibration is detected in the refrigerator body. By providing, after the display means is turned off, the user can immediately check the state of the refrigerator.

  The invention described in claim 1 is a refrigerator having a cooling system constituted by a compressor, an evaporator, a condenser, and expansion means, and a condenser temperature sensor that detects a temperature state of the condenser in the cooling system; The control means for determining whether the condenser temperature has reached the compression ratio protection area and the display and control means for notifying the user of the necessity of cleaning the condenser filter are provided. When the detected condenser temperature reaches the compression ratio protection region, the user can be informed that the condenser filter needs to be cleaned.

  The invention described in claim 2 is a refrigerator having a plurality of cooling systems, a condenser temperature sensor for detecting the condenser temperature for each cooling system, and the necessity for cleaning the condenser filter for each cooling system. Control and display means to inform the user, so that the user can clearly grasp which cooling system out of multiple cooling systems and which condenser filter needs cleaning. .

  The invention according to claim 3 is a control having a plurality of cooling systems, wherein control is performed to determine whether one of the condenser temperatures reaches the compression ratio protection region among the condenser temperatures of the respective cooling systems. Since it is not necessary to provide the display means for cleaning the condenser filter for the cooling system, it is only necessary to provide one display means, so that the cost of the display means can be reduced, and claim 1 is provided. Or similarly to claim 2, the user can be informed of the necessity of cleaning the condenser filter.

  In addition to the invention described in claim 1 or 2, the invention described in claim 4 includes an inverter for changing the rotation speed of the compressor and a command rotation speed for one or a plurality of compressors. By providing means for displaying as the operating load of each cooling system, the operating load status can be notified to the user for each cooling system.

  In addition to the invention described in claim 3, the invention described in claim 5 is a control for determining which compressor has the highest command rotational speed among the compressors in the plurality of cooling systems. Provided with a display unit that indicates the command rotational speed as the operation load of the entire refrigerator, so that it is not necessary to provide operation load display means for the number of cooling systems, and the cost of the display means can be reduced, and Similarly to the fourth aspect, the user can be notified of the operating load of the refrigerator.

  Further, in the invention described in claim 6, in the invention described in any one of claims 1 to 5, the command rotational speed to the compressor is estimated as a predicted operation negative, and from the actual compressor, Estimate the actual driving load from the signal, and provide the control means with a comparison between the predicted and actual driving load. By providing a display means for indicating an abnormal warning to the user when the measured driving load is lower than the normal operation load, the operating state of the refrigerator can be displayed more accurately. For the user, the state of the refrigerator can be grasped more accurately, and as a result, energy saving operation is conscious.

  Further, the invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the operating load of the cooling system calculated based on the command rotational speed to the compressor changes over time. By providing the control means for turning off the display means when it is determined that there is no such power, the power consumption of the display means can be reduced, and further energy saving can be realized.

  Further, the invention according to claim 8 is directed to the invention according to any one of claims 1 to 6 and the invention according to claim 7, in which the command to the compressor is slightly applied after the display means is turned off. When a change is detected in the number of revolutions, or when vibration is detected in the refrigerator body, a user can check the state of the refrigerator immediately after the display means is turned off by providing a control means for relighting the display. .

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

(Embodiment 1)
FIG. 1 is a block diagram of a refrigerator having two cooling systems according to an embodiment of the present invention. FIG. 2 is a characteristic diagram showing a compression ratio protection region used in the control means according to the embodiment. FIG. 3 is a schematic diagram of the display means of the refrigerator according to the first embodiment. 4 and 5 are flowcharts showing the display operation according to the first embodiment.

  As shown in FIG. 1, the refrigerator of the present embodiment includes a compressor 3, a condenser 4, an expansion means 5, an evaporator 6, an evaporator fan 7, and a condenser that can vary the rotation speed by inverter control. There is one cooling system composed of a fan, an evaporator temperature sensor 9, a condenser temperature sensor 10, a condenser filter 11, an internal temperature sensor 12, and a controller for controlling them. Since the refrigerator casing 1 is configured in two warehouses, it has two cooling systems. Among these two cooling systems, the control device 1, the control device 2, and the cooling system 1 are provided. And the cooling system 2 are distinguished.

  The control device 1 is connected to the display means 19 and the outside air temperature sensor 14, and is also connected to the control device 2 by the communication means 18.

  Moreover, as shown in FIG. 3, since the display means of the present embodiment displays the operating state for each cooling system, the internal temperature display unit 30 and the operational load for displaying the operational load of the cooling system are displayed for each internal compartment. The display unit 31 and the filter cleaning display unit 32 that warns that the condenser filter needs to be cleaned.

  A display operation example of the refrigerator configured as described above will be described with reference to FIGS.

  First, FIG. 4 shows an operation flow for displaying a warning for cleaning the condenser filter. In Step A1 and Step A2, the temperature of the condenser 4 is detected by the respective condenser temperature sensors 10 in the two cooling systems. Next, in Step B1 and Step B2, whether the detected temperature of the condenser 6 in each of the control devices of the two cooling systems has reached the compression ratio protection region shown in FIG. 2 or a certain predetermined value or more. Make a decision. If not, no action is taken and the temperature of the condenser 6 is continuously monitored.

  If the temperature of the condenser 6 has reached the compression ratio protection region or a certain predetermined value or more, the temperature information of the condenser 4 is collected by the communication means 18 in the control device 1, and the control device 1 performs Step C 1 and Step C 2. In order to warn of the necessity of cleaning the condenser filter, the filter cleaning display section 32 shown in the display means of FIG. This is because when the condensation temperature rises and reaches the compression ratio protection region shown in FIG. 2 or above a certain predetermined value, the load on the compressor is increased, resulting in an increase in power consumption and hindering the energy saving effect by the inverter. become.

  In general, it is designed to prevent the condensation temperature from rising up to this compression ratio protection region or a predetermined value or more regardless of whether it is for home use or for business use. However, in commercial refrigerators, the usage environment is harsher than in homes, so air contaminated with oil or dust clogs the condenser filter at the air inlet, which clogs the condensation temperature. It will cause a rise. Therefore, in order to avoid an excessive increase in operating load and maintain the energy saving effect, it is necessary to periodically clean the clogging of the condenser filter.

  Conventionally, in a commercial refrigerator that does not have inverter control, as shown in Fig. 2, a condensation warning was displayed when the condensation temperature was 60 ° C or higher. Added protection range. As described above, in order to avoid the increase in power consumption and maintain the energy saving effect, it is necessary to warn the cleaning of the condenser filter even when the condenser temperature reaches the compression ratio protection range.

  Next, FIG. 5 shows an operation flow for displaying the operating load of the cooling system. First, as Step D1 and Step D2, the actual internal temperature is detected by the internal temperature sensors 12 in the two cooling systems. Next, as the StepE1 (StepE1-1 to StepE1-3) and StepE2 (StepE2-1 to StepE2-3), the respective control devices of the two cooling systems compare the set temperature in the store with the actual store temperature. When the internal temperature is higher than the set temperature, a command for accelerating the rotation speed is issued to the compressor 3, and the calculation is performed using the command rotation speed as an operating load.

  When the internal temperature is close to or slightly lower than the set temperature, calculation is performed using the command rotational speed at that time as the operating load without issuing the rotational speed acceleration command. Next, the information on the driving load is collected by the control unit 1 through the communication unit 18, and the control unit 1 notifies the current driving load as Step F1 and Step F2, so that the driving load display unit 31 shown in the display unit of FIG. Light up.

  As described above, the refrigerator of the present embodiment has a cooling system for each room, and means for notifying the temperature state in the cabinet, the operating load state, and the cleaning time of the condenser filter 11 for each cooling system. As a result, it is easy to manage each cooling system. In particular, regarding the cleaning of the condenser filter, it is easy to understand which cooling system condenser filter needs to be cleaned. The user can easily have energy saving awareness to reduce running costs.

(Embodiment 2)
FIG. 1 is a block diagram of a refrigerator having two cooling systems according to an embodiment of the present invention. FIG. 2 is a characteristic diagram showing a compression ratio protection region used in the control means according to the embodiment. FIG. 6 is a schematic diagram of the display means of the refrigerator according to the second embodiment. 7 and 8 are flowcharts showing the display operation according to the second embodiment.

  As shown in FIG. 6, the display means of the present embodiment includes an internal temperature display unit 30 for each interior in order to display the operation state for each cooling system, and an operational load display section that displays the operational load of the cooling system. 31 and the filter cleaning display part 32 which urges | urges the warning that the condenser filter needs to be cleaned are comprised by one.

  A display operation example of the refrigerator configured as described above will be described with reference to FIGS. 2 and 6 to 8.

  First, FIG. 7 shows an operation flow for displaying a warning for cleaning the condenser filter, as in FIG. In Step A1 and Step A2, the temperature of the condenser 4 is detected by the respective condenser temperature sensors 10 in the two cooling systems. Next, in Step B1-1 and Step B2, it is determined in each control device whether the detected temperature of the condenser 4 has reached a compression ratio protection region or a predetermined value or more.

  If not, monitoring continues with each control device. When the temperature of any of the condensers 4 satisfies the above condition, the temperature state of the condenser is aggregated in the control device 1 by the communication means 18, and the higher value of the condensation temperatures of the two cooling systems is used as a representative value. In order to warn of the necessity of cleaning the condenser filter as Step C, the control device 1 turns on the filter cleaning display section 32 shown in the display means of FIG.

  Next, FIG. 8 shows an operation flow for displaying the operating load of the cooling system, as in FIG. First, as Step D1 and Step D2, the actual internal temperature is detected by the internal temperature sensors 12 in the two cooling systems. Next, as the StepE1 (StepE1-1 to StepE1-3) and StepE2 (StepE2-1 to StepE2-3), the respective control devices of the two cooling systems compare the set temperature in the store with the actual store temperature. Then, when the internal temperature is higher than the set temperature, a command for accelerating the rotation speed of the compressor is issued, and the command rotation speed is calculated as the operation load (operation load 1 and operation load 2).

  Further, when the internal temperature is close to or slightly lower than the set temperature, the command rotational speed at that time is calculated as the operational load (the operational load 1 and the operational load 2) without issuing the rotational speed acceleration command. Next, the operation load 2 calculated by the control device 2 is aggregated in the control device 1 by the communication means 18, and as Step E1-4, which of the operation load 1 and the operation load 2 is the highest value in the control device 1 is determined. to decide. Finally, the control device 1 turns on the operation load display unit 31 shown in the display means of FIG. 6 using the operation load determined to be high as the operation load of the refrigerator.

  As described above, the refrigerator of the present embodiment is provided with a cooling system for each room, but the information displayed for each cooling system is only the internal temperature state, and indicates the operation load and the filter cleaning time. The number of display units is one, and a high operating load is displayed among multiple cooling systems, and the highest temperature and the compression ratio protection region or the condenser temperature reaching a certain predetermined value or more are judged. By adding control means to display the filter cleaning time for each cooling system, the number of display means is reduced compared to those equipped with each display unit for each cooling system. Can provide the minimum amount of information.

(Embodiment 3)
FIG. 1 is a block diagram of a refrigerator having two cooling systems according to an embodiment of the present invention. FIG. 2 is a characteristic diagram showing a compression ratio protection region used in the control means according to the embodiment. FIG. 9 is a schematic view of the display means of the refrigerator according to the third embodiment. FIG. 10 is a flowchart showing the operation of displaying the operating load of the cooling system according to the third embodiment. The operation flow for displaying the warning for cleaning the condenser filter is the same as that of the first embodiment.

  First, as shown in FIG. 9, the display means of the present embodiment displays the operation state for each cooling system, so that the interior temperature display unit 30 and the prediction operation load of the cooling system are displayed for each interior. An operation load display unit 33, an actual operation load display unit 34 that displays the actual operation load of the cooling system, a filter cleaning display unit 32 that prompts a warning that the condenser filter needs to be cleaned, and a warning that displays the warning content The display unit 35 is configured.

  As shown in FIG. 10, in the operation of displaying the operation load, first, as actual Step D1 and Step D2, the actual internal temperature is detected by the internal temperature sensors 12 in the two cooling systems. Next, as StepE1 (StepE1-1 to StepE1-4) and StepE2 (StepE2-1 to StepE2-4), the control temperature of each of the two cooling systems is compared with the set temperature in the storage and the actual internal temperature. When the internal temperature is higher than the set temperature, a command for accelerating the rotational speed is issued to the compressor, and the command rotational speed is calculated as the predicted operating load. Further, when the internal temperature is close to or slightly lower than the set temperature, the command rotational speed at that time is calculated as the predicted operating load without issuing the rotational speed acceleration command.

  At the same time, the rotational speed of the compressor is detected by a signal from the compressor, and the measured rotational speed is calculated. Next, the calculated predicted operation load is compared with the actually measured operation load. Then, as StepF1 (StepF1-1 to StepF3-1) and StepF2 (StepF2-1 to StepF2-3), the comparison of the predicted operation load and the actually measured operation load is performed regardless of whether or not they match. The predicted operation display unit 33 and the measured operation load display unit 34 are turned on. If the comparison difference is greater than or equal to a predetermined value, the warning display section 35 displays a warning content such as “An abnormal load is applied to the compressor”.

  Actually, the control device (the control device 1 and the control device 2) is equipped with a main microcomputer and an inverter microcomputer. The main microcomputer issues a rotation speed command to the inverter microcomputer, and the inverter microcomputer receives a signal from the compressor 3. Then, a command for accelerating or decelerating the rotational speed is issued, and control is performed to bring the rotational speed of the compressor 3 closer to the command rotational speed from the main microcomputer. The compressor 3 is designed to rotate within a certain predetermined torque.

  Therefore, when an upper limit rotation speed acceleration command is issued from the main microcomputer to the inverter microcomputer, the compressor does not rotate according to the command rotation speed when there is an abnormality that causes an unexpected torque (overload) in the compressor. That is, the actually measured operation load is lower than the predicted rotation load. In such a case, an abnormality warning is displayed on the warning display unit 35 simultaneously with the predicted operation load and the actually measured operation load. The display unit is turned on by the control unit 1 after the information is collected in the control unit 1 by the communication unit 18.

  As described above, the refrigerator according to the present embodiment can display the operation state of the refrigerator more accurately because the operation load state can be divided into a predicted value and an actual measurement value and an abnormality warning can be displayed. Can do. For the user, the state of the refrigerator can be grasped more accurately, and as a result, energy saving operation is conscious.

(Embodiment 4)
In the fourth embodiment of the present invention, in the display means and the operation flow of the refrigerator shown in any of the first to fourth embodiments, a timer 20 is provided in the control device, and within a certain period of time. When there is no change in the command rotational speed to the compressor 3, an operation procedure for turning off the display unit of the display means is added.

  As described above, since the refrigerator of the present embodiment turns off the display unit when the rotation speed of the compressor is stable, the power consumed by the display means can be suppressed, and a further energy saving effect can be achieved.

(Embodiment 5)
The fifth embodiment of the present invention is the same as the fourth embodiment in the case where there is a slight change in the rotational speed command to the compressor 3 after the display portion of the display means is turned off, or the refrigerator housing as shown in FIG. 1 is equipped with a vibration sensor 21, and when a vibration is detected, an operation procedure for relighting the display unit of the display means is added.

  As described above, the refrigerator of the present embodiment, for further energy saving effect, after the display unit of the display unit is turned off once, the display unit is immediately turned on again by an operation such as opening the door, The operating state of the refrigerator can be confirmed.

  As described above, in the refrigerator according to the present invention, the control and display for determining the cleaning time of the condenser filter and informing the warning when the condenser temperature has reached the compression ratio protection region due to the rise in the condenser temperature. Means, a control and display means for calculating the command rotational speed to the compressor as an operating load, and notifying the operating load, and if there is no change in the command rotational speed to the compressor for a certain period of time, display means The control means for turning off the display means and the control means for relighting the display means when there is any change in the command rotational speed to the compressor after the display means is turned off, or when the refrigerator casing detects vibration. By providing it, it is possible to obtain an energy-saving effect for reducing running costs, and to accurately grasp the maintenance time for maintaining energy-saving operation and the operating state of the refrigerator. Reduction in running costs can be applied to applications for commercial refrigerators, etc. are important.

The block diagram of embodiment of the refrigerator by this invention The characteristic figure of the compression ratio protection area | region of embodiment of the refrigerator by this invention Front view of display means in embodiment 1 and embodiment 3 of refrigerator according to the present invention Operation flowchart of display in Embodiment 1 and Embodiment 3 of the refrigerator according to the present invention Operation flowchart of display in Embodiment 1 of the refrigerator according to the present invention The front view of the display means in Embodiment 2 of the refrigerator by this invention Operation flowchart in Embodiment 2 of the refrigerator according to the present invention Operation flowchart in Embodiment 2 of the refrigerator according to the present invention The front view of the display means in Embodiment 3 of the refrigerator by this invention Operation flowchart in Embodiment 3 of the refrigerator according to the present invention Configuration diagram of conventional refrigerator display means

Explanation of symbols

1 Refrigerator case 2 Inside the chamber 1
DESCRIPTION OF SYMBOLS 3 Compressor 4 Condenser 5 Expansion means 6 Evaporator 7 Evaporator fan 8 Condenser fan 9 Evaporator temperature sensor 10 Condenser temperature sensor 11 Condenser filter 12 Inside temperature sensor 13 Dew prevention heater 14 Outside temperature sensor 15 Control Device 1
16 Control device 2
17 Chamber 2
DESCRIPTION OF SYMBOLS 18 Communication means 19 Display means 20 Timer 21 Vibration sensor 30 Interior temperature display part 31 Operation load display part 32 Filter cleaning display part 33 Predictive load display part 34 Actual measurement prediction display part 35 Warning display part 40 Operation panel 41 Display part 42 Speed cooling Defrost display 43 Button lock display 44 Energy saving display 45 Audio output display 46 Switching room display section 47 Timer display section 48 Refrigeration room display section 49 Ice making display section 50 Freezer compartment display section 51 Speed cooling switch 52 Speed thawing switch 53 Speed refrigeration switch 54 Switching Room setting switch 55 Timer setting switch 56 Refrigerating room temperature setting switch 57 Freezer room temperature setting switch 58 Ice making switch

Claims (8)

  A cooling system including a compressor, an evaporator, a condenser, and expansion means; a condenser temperature sensor that detects a temperature state of the condenser in the cooling system; and the detection by the condenser temperature sensor. A refrigerator having control and display means for warning a user that a condenser filter needs to be cleaned when the temperature of the condenser reaches the compression ratio protection area of the compressor.   A plurality of cooling systems configured by a compressor, an evaporator, a condenser, and an expansion unit; a condenser temperature sensor that detects a temperature state of each of the condensers provided for each cooling system; and the condensation When the condenser temperature detected by the condenser temperature sensor reaches the compression ratio protection area of the compressor, a warning is given to the cooling system condenser filter of the plurality of cooling systems that needs to be cleaned. A refrigerator having control and display means.   A compressor, an evaporator, a condenser, a plurality of cooling systems configured by expansion means, a condenser temperature sensor for detecting a temperature state of the condenser provided for each cooling system, and Controls that warn the user that the condenser filter needs to be cleaned as a refrigerator if any of the condenser temperature in the cooling system reaches the compression ratio protected area, and A refrigerator comprising display means.   An inverter for changing the rotation speed of the compressor, and a control and display means for notifying a user of the state of the operation load using the command rotation speed to the compressor as an operation load of each cooling system. The refrigerator of Claim 1 or Claim 2.   An inverter that varies the rotational speed of the compressor, a control means that determines the highest command rotational speed to the compressor in each of the cooling systems, and the highest command rotational speed as the operating load of the entire refrigerator 4. The refrigerator according to claim 3, further comprising control and display means for notifying a user.   An inverter that varies the rotational speed of the compressor, and a command rotational speed to the compressor as a predicted operating load, a measured operating load is calculated from a signal from a compressor that is actually operating, and the predicted operating load Display means for displaying each of the actually measured operating loads and notifying the user of an abnormality warning simultaneously with the operating load in the case of an abnormality when a difference of a predetermined value or more between the predicted operating load and the actually measured operating load is generated. The refrigerator according to any one of claims 1 to 5, wherein the refrigerator is provided.   2. A control means for turning off the display means when it is determined that there is no change in the command rotational speed to the compressor for a certain period of time, provided with a timer in the control means of the cooling system. The refrigerator as described in any one of Claim 6.   Control means for re-lighting the display means when a change is detected in the command rotational speed to the compressor after turning off the display means, or when a vibration sensor is provided in the refrigerator housing and any vibration is detected. The refrigerator according to any one of claims 1 to 6, wherein the refrigerator is provided.