JP5079648B2 - Freezer refrigerator - Google Patents

Description

  The present invention relates to a refrigerator-freezer that has a refrigerator compartment and a freezer compartment, and cools the refrigerator compartment and the refrigerator compartment using a single compressor.

  For example, Patent Document 1 is known as this type of refrigerator-freezer. There, a refrigerator provided in the refrigerator compartment and the freezer compartment is connected to one compressor via a solenoid valve, and the compressor is set so that the temperature in the refrigerator compartment and the freezer compartment is within a predetermined temperature range. The refrigerant compressed in the above and liquefied in the condenser is supplied to the refrigerators in the refrigerator compartment and the freezer compartment. In addition, doors with a heat insulating structure are arranged at the front openings of the refrigerator compartment and the freezer compartment, and each door is opened to take out the contents inside the refrigerator compartment and the freezer compartment, or inside the refrigerator compartment and the freezer compartment. It is designed to accommodate the contents.

JP 2000-105048 A (FIGS. 1-6)

  In the refrigerator-freezer of Patent Document 1, since the refrigerant continues to be supplied to the cooler of the refrigerator compartment until the refrigerator compartment falls below a predetermined temperature, the temperature of the refrigerator compartment is greatly increased by opening the door of the refrigerator compartment. Sometimes, the supply time of the refrigerant to the cooler in the refrigerator compartment becomes longer, and the pressure on the refrigerant outlet side of the cooler in the refrigerator compartment rises excessively. For this reason, it is inevitable that the pressure on the refrigerant outlet side of the cooler in the freezer compartment that does not open the door also rises and the temperature of the refrigerant supplied to the cooler in the freezer compartment becomes high. There is a risk that it will rise and cause problems such as thawing of the contents (frozen products) in the freezer compartment.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to reduce the temperature rise in the freezer compartment when the door of the refrigerator compartment is opened, and to reduce the contents in the freezer compartment. It is providing the refrigerator-freezer which can be cooled appropriately.

The present invention includes a refrigerating chamber 51 and a freezing chamber 52 whose front surfaces are open, coolers 61 and 62 disposed in the refrigerating chamber 51 and the freezing chamber 52, a door 10 that opens and closes the front opening of the refrigerating chamber 51, and A refrigerator that has a door sensor 191 that detects opening and closing of the door 10 and that cools the inside of the refrigerator compartment 51 and the freezer compartment 52 by the refrigerant supplied from the single compressor 12 to each of the coolers 61 and 62. set to target.
The coolers 61 and 62 of the refrigerator compartment 51 and the freezer compartment 52 are connected to the compressor 12 via electromagnetic valves 151 and 152, respectively, and the coolers 61 and 62 are opened when the electromagnetic valves 151 and 152 are opened. The refrigerant is supplied to the tank. Further, temperature sensors 181 and 182 for detecting the internal temperature are arranged in the refrigerator compartment 51 and the freezer compartment 52, and the refrigerator compartment 51 and the freezer compartment are based on the detected temperatures D1 and D2 of the temperature sensors 181 and 182. The solenoid valves 151 and 152 are controlled so that the inside of the 52 is within a predetermined temperature range.
Then, after the door sensor 191 detects that the door 10 of the refrigerating chamber 51 has been opened, the refrigerating chamber 51 and the freezing chamber 52 are in contact with each other until a predetermined waiting time Lt elapses after the door 10 is closed. When both of the corresponding solenoid valves 151 and 152 are opened, the solenoid valve 151 corresponding to the refrigeration chamber 51 is closed, and when the standby time Lt elapses after the door 10 is closed, the refrigeration chamber 51 The electromagnetic valve 151 corresponding to is opened.
Here, when the electromagnetic valve 151 corresponding to the freezer compartment 51 is opened before the electromagnetic valve 152 corresponding to the freezer compartment 52 is opened, the electromagnetic valve 152 corresponding to the freezer compartment 52 is opened. When the solenoid valve 151 corresponding to the refrigerator compartment 51 is closed and the solenoid valve 152 corresponding to the freezer compartment 52 is opened before the solenoid valve 151 corresponding to the refrigerator compartment 51, the solenoid valve 151 corresponds to the refrigerator compartment 51. When the solenoid valve 151 to be opened is opened, the solenoid valve 151 corresponding to the refrigerator compartment 51 is closed.

  When it is detected by the door sensor 191 that the door 10 of the refrigerating room 51 is opened, if both the solenoid valves 151 and 152 corresponding to the refrigerating room 51 and the freezing room 52 are open, the refrigerating room 51 The electromagnetic valve 151 corresponding to can be closed.

  When only the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is in the open state, when the waiting time Lt elapses after the door sensor 191 detects that the door 10 of the refrigerator compartment 51 is closed, the freezer compartment 52 Only the electromagnetic valve 152 corresponding to can be opened. In this case, the solenoid valve 151 corresponding to the refrigerator compartment 51 is not closed.

  When it is detected that the electromagnetic valves 151 and 152 corresponding to the refrigerator compartment 51 and the freezer compartment 52 are both opened and the door 10 of the refrigerator compartment 51 is opened, the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is changed. After the closing operation, when the electromagnetic valve 152 corresponding to the freezer compartment 52 is closed until the standby time Lt elapses after the door 10 of the refrigerator compartment 51 is closed, the electromagnetic corresponding to the refrigerator compartment 51 is used. The valve 151 can be opened.

  When a predetermined waiting time W shorter than the waiting time Lt has elapsed since the door 10 of the refrigerator compartment 51 is closed, a predetermined high temperature value in which the detection temperature D1 of the temperature sensor 181 of the refrigerator compartment 51 is set in advance. If it is DH or more, the solenoid valve 151 corresponding to the refrigerator compartment 51 can be opened. Here, the high temperature value DH is set to a temperature higher than the predetermined temperature range.

  In the refrigerator-freezer according to the present invention, after the door 10 of the refrigerator compartment 51 is opened, the electromagnetic valve 151 corresponding to the refrigerator compartment 51 and the refrigerator compartment 52 until the standby time Lt elapses after the door 10 is closed. When all 152 are opened, the solenoid valve 151 corresponding to the refrigerator compartment 51 is closed. As a result, the temperature inside the refrigerator compartment 51 has risen significantly due to the door 10 being opened, so that the refrigerant can be prevented from being continuously supplied to the cooler 61 of the refrigerator compartment 51 for a long time. An excessive increase in pressure on the refrigerant outlet 62b side of the cooler 62 in the freezer compartment 52 due to continuation for a long time can be suppressed, and an increase in the temperature of the refrigerant supplied to the cooler 62 in the freezer compartment 52 can be suppressed. In addition, since the refrigerant is supplied to the cooler 62 of the freezer compartment 52, the temperature rise in the freezer compartment 52 can be reliably suppressed, and the contents (frozen products) in the freezer compartment 52 are prevented from being thawed. Thus, it is possible to properly cool and store the contents.

  Further, when the standby time Lt elapses, even if the electromagnetic valve 152 corresponding to the freezer compartment 52 is in the open state, the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is opened to suppress the temperature rise in the refrigerator compartment 51. Yes. For this reason, quality deterioration of the contents (refrigerated goods) in the refrigerator compartment 51 due to the prolonged closed state of the solenoid valve 151 corresponding to the refrigerator compartment 51 is prevented, and the contents in the refrigerator compartment 51 and the freezer compartment 52 are removed. Each can be properly cooled and stored, contributing to the improvement of the reliability of the refrigerator-freezer.

  When both the solenoid valves 151 and 152 corresponding to the refrigerator compartment 51 and the freezer compartment 52 are open when the door 10 of the refrigerator compartment 51 is opened, the solenoid valve 151 corresponding to the refrigerator compartment 51 is closed. Therefore, the pressure rise on the refrigerant outlet 62b side of the cooler 62 of the freezer compartment 52 associated with the opening of the door 10 of the refrigerator compartment 51 can be suppressed at an early stage. Thereby, the temperature rise of the refrigerant supplied to the cooler 62 of the freezer compartment 52 can be reliably suppressed, and the contents in the freezer compartment 52 can be prevented from being thawed.

  When only the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is in the open state, when the standby time Lt has elapsed after the door 10 of the refrigerator compartment 51 is closed, only the electromagnetic valve 152 corresponding to the freezer compartment 52 is opened. The solenoid valve 151 corresponding to the refrigerator compartment 51 can be prevented from being closed. That is, when only the electromagnetic valve 151 corresponding to the refrigerating chamber 51 remains open and the standby time Lt elapses after the door 10 of the refrigerating chamber 51 is closed, the temperature in the refrigerating chamber 51 also decreases to some extent. Accordingly, the time until the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is closed after the standby time Lt has elapsed is shortened. Therefore, even if the electromagnetic valve 152 corresponding to the freezer compartment 52 is opened after the standby time Lt has elapsed, the above-described freezer compartment is reduced by the short time until the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is closed. 52, the pressure increase on the refrigerant outlet 62b side of the cooler 62 is suppressed, the temperature increase in the freezer compartment 52 is suppressed, and the thawing of the contents in the freezer compartment 52 can be prevented. And the inside of the refrigerator compartment 51 can be cooled early by the part which does not close the solenoid valve 151 corresponding to the refrigerator compartment 51.

  After the electromagnetic valves 151 and 152 corresponding to the refrigerator compartment 51 and the freezer compartment 52 are both open and the door 10 of the refrigerator compartment 51 is opened, the solenoid valve 151 corresponding to the refrigerator compartment 51 is closed. When the electromagnetic valve 152 corresponding to the freezer compartment 52 is closed until the standby time Lt elapses after the door 10 of the refrigerator compartment 51 is closed, the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is opened. be able to. Thereby, the inside of the refrigerator compartment 51 can be cooled earlier than the case where the electromagnetic valve 151 corresponding to the refrigerator compartment 51 is opened after waiting for the waiting time Lt, for example.

  When it is repeated that the door 10 of the refrigerator compartment 51 is opened before the standby time Lt elapses after the door 10 of the refrigerator compartment 51 is closed with the electromagnetic valve 151 corresponding to the refrigerator compartment 51 closed. The electromagnetic valve 151 corresponding to the refrigerator compartment 51 is not opened and the closed state continues for a long time, and the temperature in the refrigerator compartment 51 rises excessively. In the present invention, even if the waiting time W elapses after the door 10 of the refrigerator compartment 51 is closed, if the detected temperature D1 of the temperature sensor 181 of the refrigerator compartment 51 is equal to or higher than the predetermined high temperature value DH, the refrigerator is stored. The electromagnetic valve 151 corresponding to the chamber 51 is opened. This prevents the closed state of the solenoid valve 151 corresponding to the refrigerator compartment 51 from continuing for a long time and causing the temperature in the refrigerator compartment 51 to rise excessively, resulting in deterioration of the quality of the contents in the refrigerator compartment 51. it can. Even in this case, the contents in the refrigerator compartment 51 are properly cooled and stored.

  An embodiment of a refrigerator-freezer according to the present invention will be described with reference to FIGS. In FIG. 2, the refrigerator / freezer includes a case main body 1 with a heat insulating structure whose front surface is open, a partition wall 2 with a heat insulating structure that partitions the internal space of the case main body 1 up and down, and a machine room disposed below the case main body 1. 3 is provided. A refrigerating room 51 is formed at the upper part of the partition wall 2 in the case body 1, and a freezing room 52 is formed at the lower part of the partition wall 2.

  In the refrigerator compartment 51 and the freezer compartment 52, coolers 61 and 62 are arranged, respectively. The cooler 61 of the refrigerator compartment 51 is arranged at the upper end portion in the duct 4 arranged at the rear part of the refrigerator compartment 51. Then, the cold air in the refrigerator compartment 51 sucked into the duct 4 by the fan 8 disposed in the upper opening of the duct 4 is cooled by the cooler 61 and then blown out into the refrigerator compartment 51 from the lower opening of the duct 4. The The cooler 62 of the freezer compartment 52 is formed in a panel shape and disposed on the inner wall of the freezer compartment 52. The inside of the refrigerator compartment 51 is cooled to 3 ° C., for example, and the inside of the freezer compartment 52 is cooled to −30 ° C., for example. Each front opening of the refrigerator compartment 51 and the freezer compartment 52 is opened and closed by the doors 10 and 11 having a heat insulating structure. In the refrigerator compartment 51 and the freezer compartment 52, door sensors 191 and 192 (FIG. 1) for detecting the opening and closing of the doors 10 and 11 are arranged, respectively.

  A refrigeration mechanism 7 shown in FIGS. 1 and 2 is disposed in the machine room 3, and the refrigeration mechanism 7 includes a single compressor 12, a single condenser 13, and the like. The refrigerant inlets 61a and 62a of the respective coolers 61 and 62 are connected to the refrigerant outlet 13b of the condenser 13 via the expansion valves 141 and 142 and the electromagnetic valves 151 and 152, respectively, and the refrigerant inlet 13a of the condenser 13 is Connected to the refrigerant outlet 12 b of the compressor 12. That is, the refrigerant inlets 61 a and 62 a side of the coolers 61 and 62 are connected to the refrigerant outlet 12 b side of the same compressor 12 through the same condenser 13, respectively. In addition, the refrigerant outlet 61b of the cooler 61 in the refrigerator compartment 51 is connected to the refrigerant inlet 12a of the compressor 12 via the capillary tube 20, and the refrigerant outlet 62b of the cooler 62 in the freezer compartment 52 is connected to the check valve 21. To the refrigerant inlet 12 a of the compressor 12. That is, the refrigerant outlets 61b and 62b of the respective coolers 61 and 62 are connected to the refrigerant inlet 12a side of the compressor 12, respectively.

  The refrigerant inlet 12a and the refrigerant outlet 12b of the compressor 12 are connected by a bypass passage 31, and an electromagnetic valve 32 and a capillary tube 33 for restricting the flow rate of the refrigerant are arranged in the bypass passage 31. When the compressor 12 is stopped, the solenoid valve 32 is turned on (opening operation) for a predetermined time (for example, 90 seconds), thereby equalizing the pressure at the refrigerant inlet 12a side and the refrigerant outlet 12b side of the compressor 12. Is planned.

  A heater 16 is disposed in the refrigerator compartment 51 so as to face the cooler 7, and the heater 16 is used for defrosting the cooler 61 in the refrigerator compartment 51. In the refrigerator compartment 51 and the freezer compartment 52, temperature sensors 181 and 182 (FIG. 1) for detecting the internal temperature of the respective compartments 51 and 52 are arranged. The condenser 13 is cooled by the air blown by the fan 17.

  In the refrigerator-freezer, as shown in FIG. 1, the solenoid valves 151 and 152 are opened and closed based on the detected temperatures of the temperature sensors 181 and 182 so that the chambers 51 and 52 are within a predetermined temperature range. In addition, a control unit 23 that controls driving and stopping of the compressor 12 is provided. The controller 23 drives the compressor 12 when at least one of the solenoid valves 151 and 152 for the refrigerator compartment 51 and the freezer compartment 52 is on (opens), and both the solenoid valves 151 and 152 are off (closed). Valve), the compressor 12 is stopped.

  When the refrigerating chamber solenoid valve 151 is operated to open (open operation), the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the refrigerating chamber cooler 61, and the refrigerant The inside of the refrigerator compartment 51 is cooled by the heat of vaporization. When the freezer compartment solenoid valve 152 is operated to open (open operation), the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the freezer compartment cooler 62, The inside of the freezer compartment 52 is cooled by the heat of vaporization of the refrigerant. The control unit 23 incorporates various timers 24 (FIG. 1) for timing.

  Next, the operation of the refrigerator-freezer of the present invention will be described with reference to the flowcharts of FIGS. 3 to 8 (hereinafter referred to as this flowchart). At the start of execution of this flowchart, both the solenoid valves 151 and 152 for the refrigerator compartment and the freezer compartment are turned off (closed), and accordingly, the temperatures in the refrigerator compartment 51 and the freezer compartment 52 are changed. Is in a rising state.

  First, the control unit 23 resets the timer 24 (S1), and when the detected temperature D1 of the refrigeration room 51 becomes equal to or higher than a predetermined refrigeration on-temperature value Dn1 (for example, 7 ° C.) (YES in S2), the refrigeration is performed. The room solenoid valve 151 is turned on (opening operation) (S3). Thus, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the refrigerator 61 for the refrigerator compartment, and the inside of the refrigerator compartment 51 is cooled by the heat of vaporization of the refrigerant. When the detected temperature D2 of the freezer compartment 52 is equal to or higher than a predetermined freezing on-temperature value Dn2 (for example, −28 ° C.) (YES at S4), the control unit 23 turns on the electromagnetic valve 152 for the freezer compartment. (Opening operation) is performed (S5). Thus, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the cooler 62 for the freezer compartment, and the inside of the freezer compartment 52 is cooled by the heat of vaporization of the refrigerant.

  Then, when the detected temperature D1 of the refrigerating chamber 51 becomes equal to or lower than a predetermined refrigerating off temperature value Df1 (eg, 3 ° C.) (YES in S6), the control unit 23 turns off the refrigerating chamber electromagnetic valve 151. (Close operation) (S7). Further, when the detected temperature D2 of the freezer compartment 52 is equal to or lower than a predetermined freezing off temperature value Df2 (for example, −31 ° C.) (YES at S8), the control unit 23 turns off the electromagnetic valve 152 for the freezer compartment. (Close operation) (S9).

  These processes in S2 to S9 (normal processes) are repeated until the door 10 of the refrigerating room 51 is opened (YES in S10), whereby the temperature in the refrigerating room 51 is set to the refrigeration off temperature value Df1 and the refrigerating room. The temperature in the freezer compartment 52 is controlled within a temperature range between the on-temperature value Dn1 and the temperature in the freezer compartment 52 is controlled within a temperature range between the freezing-off temperature value Df2 and the freezing-on temperature value Dn2.

  When the door sensor 191 detects that the door 10 of the refrigerator compartment 51 has been opened, the control unit 23 proceeds to the process of S11. For example, when the door 10 of the refrigerating room 51 is opened (YES in S10), the control unit 23 is in the on state (open state) of the refrigerating room electromagnetic valve 151 in S11 (YES in S11). If the room solenoid valve 152 is on (YES in S13), the refrigerator compartment solenoid valve 151 is turned off (closed) (S14). In addition, at this time, it demonstrates that the detected temperature D1 of the refrigerator compartment 51 is higher than the refrigeration off temperature value Df1 (NO in S12). If the refrigeration room solenoid valve 151 is off (closed) in S11 (NO in S11), the process proceeds to S28.

  When the door 10 of the refrigerator compartment 51 is not closed in S15 (NO in S15), the controller 23 determines that the detected temperature D2 of the freezer compartment 52 is higher than the freezing off temperature value Df2 (S16). NO), the process returns to S15, and the processes after S15 are repeated. On the other hand, when it is detected by the door sensor 191 that the door 10 of the refrigerator compartment 51 is closed (YES in S15), the control unit 23 starts counting T1 by the timer 24 (S17). Then, before the measured time T1 reaches a predetermined standby time Lt (for example, 5 minutes) set in advance (NO in S18), the timer 24 starts measuring TW (S19), and the measured time TW is When a predetermined waiting time W (for example, 1 minute) set in advance is reached (YES in S20), the time count TW is reset (S21), and the process proceeds to S22.

  In S22, the control unit 23 determines whether the detected temperature D1 of the refrigerating chamber 51 is equal to or higher than a predetermined high temperature value DH (for example, 10 ° C.) that is a temperature value higher than the refrigeration on temperature value Dn1. Judge whether or not. When the detected temperature D1 of the refrigerator compartment 51 is lower than the high temperature value DH (NO in S22), the control unit 23 determines that the detected temperature D2 of the freezer compartment 52 is higher than the freezing off temperature value Df2 ( If NO in S23) and the door 10 of the refrigerator compartment 51 is not opened (NO in S24), the process returns to S17 to repeat the processes after S17. On the other hand, when it is detected that the door 10 of the refrigerator compartment 51 is opened by the door sensor 191 in S24 (YES in S24), the control unit 23 resets the time count T1 (S25), and then returns to S15. The processes after S15 are repeated.

  When the detected temperature D2 of the freezer compartment 52 becomes equal to or lower than the freezing off temperature value Df2 in S16 or S23 (YES in S16 or S23), the control unit 23 turns off the electromagnetic valve 152 for the freezer compartment (S26), and the refrigerator compartment The electromagnetic valve 151 is turned on (S27). Thereafter, the control unit 23 returns to S1 and resets the timer 24, and then repeats the processing after S2 (normal processing).

  When the standby time Lt has elapsed in S18 (YES in S18), the control unit 23 proceeds to S27 and turns on the electromagnetic valve 151 for the refrigerator compartment, and then performs the processes after S1. When the detected temperature D1 of the refrigerating chamber 51 becomes equal to or higher than the high temperature value DH in S22 (YES in S22), the control unit 23 proceeds to S27 and turns on the refrigerating chamber electromagnetic valve 151, and thereafter Process.

  On the other hand, for example, when the normal processing of S2 to S9 is repeated, after the door 10 of the refrigerator compartment 51 is opened (YES in S10), the electromagnetic valve 151 for the refrigerator compartment is in an on state (YES in S11). In addition, when the freezer compartment solenoid valve 152 is in the off state (NO in S13), the control unit 23 proceeds to the process of S29. If the door 10 of the refrigerator compartment 51 is not closed (NO in S29), if the detected temperature D2 in the freezer compartment 52 is lower than the freezing off temperature value Df2 (NO in S30), S12 Returning to step S12, the processes in and after S12 are repeated.

  In S12, when the detected temperature D1 of the refrigerating chamber 51 is equal to or lower than the refrigerating off temperature value Df1 (YES in S12), the control unit 23 turns off the refrigerating chamber electromagnetic valve 151 in S38 (closed operation). ) And then the process proceeds to S28. If the detected temperature D2 of the freezer compartment 52 is equal to or lower than the freezing off temperature value Df2 in S30 (YES in S30), the control unit 23 turns on the freezer compartment electromagnetic valve 152 in S31, and then proceeds to the processing of S12. To do.

  In S29, when it is detected by the door sensor 191 that the door 10 of the refrigerator compartment 51 is closed (YES in S29), the control unit 23 starts counting time T2 by the timer 24 (S32). Before the time T2 reaches the standby time Lt (NO in S33), the detected temperature D1 of the refrigerator compartment 51 is higher than the refrigeration off temperature value Df1, and the detected temperature D2 of the freezer compartment 52 is used for freezing. If the temperature is lower than the on-temperature value Dn2 (NO in S34, NO in S35), the processes of S29 to S35 are repeated. When the standby time Lt has elapsed in S33 (YES in S33), the control unit 23 returns to S1 and resets the time count T2 in the timer 24, and then repeats the processing after S2 (normal processing).

  If the detected temperature D1 of the refrigerating room 51 is equal to or lower than the refrigerating off temperature value Df1 in S34 (YES in S34), the control unit 23 turns off the refrigerating room electromagnetic valve 151 in S36, and then performs the process of S28. Migrate to If the detected temperature D2 of the freezer compartment 52 is equal to or higher than the freezing on-temperature value Dn2 in S35 (YES in S35), the controller 23 turns on (opens) the freezer compartment electromagnetic valve 152 in S37. It returns to S14 and repeats the process after S14.

  If the freezer compartment solenoid valve 152 is in the ON state in S28 (YES in S28), the control unit 23 determines that the refrigerating compartment 51 is in the closed state when the door 10 of the refrigerating compartment 51 is not closed (NO in S39). If the detected temperature D1 is lower than the refrigeration on-temperature value Dn1 (NO in S40), the process proceeds to S41. If the detected temperature D2 of the freezer compartment 52 is equal to or lower than the freezing off temperature value Df2 (YES in S41), the control unit 23 turns off the freezer compartment electromagnetic valve 152 in S42, and then returns to S11. The processes after S11 are repeated.

  If the detected temperature D1 of the refrigerating room 51 is equal to or higher than the refrigeration on-temperature value Dn1 in S40 (YES in S40), the control unit 23 returns to S14 and repeats the processes after S14. If the detected temperature D2 of the freezer compartment 52 is higher than the freezer off temperature value Df2 in S41 (NO in S41), the process returns to S11 with the freezer electromagnetic valve 152 turned on, and after S11. Repeat the process.

  In S39, when it is detected by the door sensor 191 that the door 10 of the refrigerator compartment 51 is closed (YES in S39), the control unit 23 starts measuring T3 by the timer 24 (S44). Then, before the time T3 reaches the standby time Lt (NO in S45), the control unit 23 returns to S39 and repeats the processing after S39, and when the standby time Lt has elapsed (YES in S45), S1. After returning to step S3 and resetting the time T3 measured by the timer 24, the processing after S2 (normal processing) is repeated.

  When the freezer compartment solenoid valve 152 is off in S28 (NO in S28), the control unit 23 determines that the refrigerating compartment 51 does not close when the door 10 of the refrigerating compartment 51 is not closed (NO in S47). If the detected temperature D1 is lower than the refrigeration on-temperature value Dn1 (NO in S48), the process proceeds to S49. If the detected temperature D2 of the freezer compartment 52 is equal to or higher than the on-temperature value Dn2 for freezing (YES in S49), the control unit 23 turns on the freezer compartment electromagnetic valve 152 in S50, and then returns to S11. The processes after S11 are repeated.

  If the detected temperature D1 of the refrigerating chamber 51 is equal to or higher than the on-temperature value Dn1 for refrigerating in S48 (YES in S48), the solenoid valve 151 for refrigerating chamber is turned on in S51. repeat. If the detected temperature D2 of the freezer compartment 52 is lower than the freezer on-temperature value Dn2 in S49 (NO in S49), the process returns to S11 with the freezer electromagnetic valve 152 turned off, and after S11. Repeat the process.

  In S47, when it is detected by the door sensor 191 that the door 10 of the refrigerator compartment 51 is closed (YES in S47), the control unit 23 starts measuring the time T4 by the timer 24 (S52). Then, before the time T4 reaches the standby time Lt (NO at S53), the control unit 23 returns to S11 and repeats the processing after S11. When the standby time Lt has elapsed (YES at S53), S1 After returning to step S4 and resetting the time T4 counted by the timer 24, the processing after S2 (normal processing) is repeated.

  The effect | action of the refrigerator-freezer of this invention is demonstrated using the timing chart of FIG. 9 and FIG. For example, the solenoid valves 151 and 152 for the refrigerator compartment and the freezer compartment are turned on until the door 10 of the refrigerator compartment 51 is opened (time t1, time t2), and the detected temperature D1 of the refrigerator compartment 51 is refrigerated. When the temperature is higher than the off-temperature value Df1 (YES in S11, NO in S12, YES in S13), the electromagnetic valve 151 for the refrigerator compartment is turned off in response to the opening of the door 10 (YES in S10). Operated (time t3: S14).

  And since the detection temperature D2 of the freezer compartment 52 is higher than the freezing off temperature value Df2 (NO in S16), the door 10 of the refrigerator compartment 51 is closed while the freezer compartment electromagnetic valve 152 remains on. (Time t4: YES in S15) After that, when the standby time Lt elapses (time t5: YES in S18), the electromagnetic valve 151 for the refrigerator compartment is turned on (S27). When the detected temperature D1 of the refrigerating chamber 51 becomes equal to or lower than the refrigerating off temperature value Df1 (time t6), the refrigerating chamber electromagnetic valve 151 is turned off, and the detected temperature D2 of the freezing chamber 52 is turned off for freezing. When the temperature value becomes equal to or lower than Df2 (time t7), the freezer electromagnetic valve 152 is turned off.

  That is, when the door 10 of the refrigerator compartment 51 is opened, the temperature in the refrigerator compartment 51 rises rapidly to a temperature higher than the refrigeration on-temperature value Dn1. In order to lower the raised temperature in the refrigerating chamber 51 below the refrigerating off temperature value Df1, the normal operation of S2 to S9 is performed when the refrigerating chamber electromagnetic valve 151 is closed with the door 10 of the refrigerating chamber 51 closed. It will be turned on for a longer time than in the case of. When the refrigeration chamber electromagnetic valve 151 is turned on continuously for a long time, the pressure on the refrigerant outlet 61b side of the cooler 61 in the refrigeration chamber 51 rises excessively. The pressure on the refrigerant outlet 62b side also increases, and the temperature of the refrigerant supplied to the cooler 62 in the freezer compartment 52 increases. As a result, the temperature in the freezer compartment 52 gradually increases, which may lead to thawing of the contents (frozen product) in the freezer compartment 52.

  In order to solve such a problem, when the electromagnetic valves 151 and 152 corresponding to the refrigerator compartment 51 and the freezer compartment 52 are turned on and the door 10 of the refrigerator compartment 51 is opened, the electromagnetic valve 151 for the refrigerator compartment is forcibly set. An off operation is performed to suppress an increase in pressure on the refrigerant outlet 62b side of the cooler 62 in the freezer compartment 52 described above. In addition, since the refrigerant is supplied to the cooler 62 of the freezer compartment 52, the temperature rise in the freezer compartment 52 can be reliably suppressed, and thawing of the contents in the freezer compartment 52 can be prevented. .

  When the standby time Lt elapses, even if the freezer compartment solenoid valve 152 is in the on state, the refrigerator compartment solenoid valve 151 is turned on to suppress the temperature rise in the refrigerator compartment 51. For this reason, the deterioration of the quality of the contents (refrigerated goods) in the refrigerator compartment 51 due to the prolonged forced off operation of the electromagnetic valve 151 for the refrigerator compartment is prevented, and the articles in the refrigerator compartment 51 and the freezer compartment 52 are prevented. Can be stored properly cooled.

  Further, for example, in the normal processing of S2 to S9, after the freezer compartment solenoid valve 152 is turned off and the refrigerator compartment solenoid valve 151 is turned on (time t8), the door 10 of the refrigerator compartment 51 is opened. (Time t9: YES at S10), the cold room electromagnetic valve 151 is not turned off and remains in the on state (YES at S11, NO at S12 / S13, NO at S29 / S30). Thereafter, the door 10 of the refrigerator compartment 51 is closed (YES at time t10: S29). When the standby time Lt has elapsed (YES at time t11: S33), the process returns to the normal processing of S2 to S9. That is, even if the detected temperature D2 of the freezer compartment 52 becomes equal to or higher than the freezer on-temperature value Dn2 (YES in S4) and the freezer compartment solenoid valve 152 is turned on (time t12: S5), The on state of the solenoid valve 151 is maintained. When the detected temperature D1 of the refrigerating room 51 becomes equal to or lower than the refrigerating off temperature value Df1 (time t13: YES at S6), the refrigerating room electromagnetic valve 151 is turned off (S7).

  That is, the temperature in the refrigerator compartment 51 is also lowered to some extent when the standby time Lt elapses after the door 10 of the refrigerator compartment 51 is closed while the electromagnetic valve 151 for the refrigerator compartment remains on. For this reason, after the standby time Lt has elapsed, the time until the detected temperature D1 of the refrigerating chamber 51 becomes equal to or lower than the refrigerating off temperature value Df1 and the refrigerating chamber electromagnetic valve 151 is turned off is shortened. Therefore, even if the freezer compartment solenoid valve 152 is turned on after the standby time Lt has elapsed, the cooler of the freezer compartment 52 is reduced by the amount of time until the refrigerator compartment solenoid valve 151 is turned off. An increase in pressure on the refrigerant outlet 62b side of 62 is suppressed, and an increase in temperature in the freezer compartment 52 is suppressed. And the inside of the refrigerator compartment 51 can be cooled early by the part which does not carry out the OFF operation of the solenoid valve 151 for refrigerator compartments.

  For example, when the door 10 of the refrigerating room 51 is opened (time t14: YES at S10), the refrigerating room electromagnetic valve 151 is off (NO at S11), and the freezing room electromagnetic valve 152 is opened. Is OFF (NO in S28), the door 10 of the refrigerator compartment 51 is closed (time t16), and before the standby time Lt elapses (NO in S47), the electromagnetic valve 151 for the refrigerator compartment 151 Is turned on (time t15: YES in S48, S51) and the freezer compartment solenoid valve 152 is turned on (time t17: S49: YES, S50), the refrigerator compartment solenoid valve 151 is turned off. It is operated (YES in S11, NO in S12, YES in S13, S14). When the standby time Lt elapses after the electromagnetic valve 151 is turned off (time t18: YES at S18), the electromagnetic valve 151 for the refrigerator compartment is turned on (S27).

  Thus, when the door 10 of the refrigerator compartment 51 is opened, even if the solenoid valve 151 for refrigerator compartments is in an OFF state, the door 10 of the refrigerator compartment 51 is closed, and then the standby time Lt elapses. When the electromagnetic valve 151 for the refrigerator compartment is turned on and the electromagnetic valve 152 for the freezer compartment is turned on by this time, the electromagnetic valve 151 for the refrigerator compartment is forcibly turned off also in this case. When the detected temperature D1 of the refrigerating chamber 51 becomes equal to or lower than the refrigerating off temperature value Df1 (time t19), the refrigerating chamber electromagnetic valve 151 is turned off, and the refrigerating chamber 52 detected temperature D2 becomes the refrigerating off temperature. When the value is less than or equal to the value Df2 (time t20), the freezer compartment solenoid valve 152 is turned off.

  Further, for example, when the door 10 of the refrigerating room 51 is opened, the refrigerating room electromagnetic valve 151 is turned off (NO in S11), and the freezing room electromagnetic valve 152 is turned on (S28). After the door 10 of the refrigerating room 51 is closed (YES in S39), the detected temperature D1 of the refrigerating room 51 is equal to or higher than the on-temperature value Dn1 for refrigerating until the standby time Lt elapses (NO in S45). Even if it becomes, the OFF state of the solenoid valve 151 for refrigerator compartments is maintained. Then, after the standby time Lt has elapsed (YES in S45), the refrigeration room electromagnetic valve 151 is turned on (YES in S2, S3).

  Further, for example, in the normal processing of S2 to S9, after the electromagnetic valve 151 for the refrigerator compartment is turned on (time t21), the electromagnetic valve 152 for the freezer compartment is turned on (time t22), and then the refrigerator compartment Also when 51 door 10 is opened (time t23: YES at S10), the refrigerator-use electromagnetic valve 151 is turned off (YES at S11, NO at S12, YES at S13, S14). Thereafter, the door 10 of the refrigerator compartment 51 is closed (time t24: YES at S15), and the detection of the freezer 52 is performed before the standby time Lt elapses (NO at S18, YES at S20, NO at S23 / S24). When the temperature D2 becomes equal to or lower than the freezing off temperature value Df2 (time t25: NO at S23), the freezer compartment solenoid valve 152 is turned off (S26), and the refrigerating compartment solenoid valve 151 is turned on. (S27).

  That is, when the electromagnetic valve 152 for the freezer compartment is turned off before the standby time Lt elapses after the door 10 of the refrigerator compartment 51 is opened and the electromagnetic valve 151 for the refrigerator compartment is turned off, By turning on the electromagnetic valve 151 for the room, the inside of the refrigerating room 51 can be cooled earlier than when the electromagnetic valve 151 for the refrigerating room is turned on, for example, after waiting time Lt has elapsed. . For example, after the waiting time Lt has elapsed (time t26), when the detected temperature D1 of the refrigerating chamber 51 becomes equal to or lower than the refrigerating off temperature value Df1 (time t27), the refrigerating chamber electromagnetic valve 151 is turned off. Operated.

  Further, for example, in the normal process of S2 to S9, after the electromagnetic valve 152 for the freezer compartment is turned on with the electromagnetic valve 151 for the refrigerator compartment turned off (time t30), the door 10 of the refrigerator compartment 51 is opened. (Time t31: YES in S10), if the detected temperature D1 of the refrigerator compartment 51 is lower than the refrigeration on-temperature value Dn1 (NO in S11, YES in S28, NO in S39, YES in S40), The electromagnetic valve 151 is kept off (S14).

  After the door 10 of the refrigerator compartment 51 is closed in this state (time t32: YES at S15), before the standby time Lt elapses (NO at S18), the door 10 of the refrigerator compartment 51 is opened (time t33). : YES in S24), the off state of the electromagnetic valve 151 for the refrigerator compartment is maintained. At this time, even if the waiting time W elapses after the door 10 of the refrigerator compartment 51 is closed (YES in S20), the detected temperature D1 of the refrigerator compartment 51 is lower than the predetermined high temperature value DH. Explanation is given as (NO in S22).

  And it is repeated that the door 10 of the refrigerator compartment 51 is opened before the waiting time Lt passes after the door 10 of the refrigerator compartment 51 is closed with the electromagnetic valve 151 for refrigerator compartment closed. Even after waiting time W has elapsed (time t35) after the door 10 of the refrigerator compartment 51 is closed (time t34), the detected temperature D1 of the temperature sensor 181 in the refrigerator compartment 51 is equal to or higher than the high temperature value DH. (YES in S20 and S22), the solenoid valve 151 for the refrigerator compartment is turned on (S27).

  In other words, if the electromagnetic valve 151 for the refrigerator compartment is kept off for a long time, the temperature in the refrigerator compartment 51 rises excessively, causing the quality of the items stored in the refrigerator compartment 51 to deteriorate. For this reason, even if the waiting time W elapses after the door 10 of the refrigerator compartment 51 is closed, if the detected temperature D1 of the refrigerator compartment 51 is equal to or higher than the high temperature value DH, the electromagnetic valve 151 for the refrigerator compartment is turned off. The temperature is increased in the refrigerator compartment 51 by forcibly turning on. As a result, the quality of the stored items in the refrigerator compartment 51 is prevented from being deteriorated, and the stored items in the refrigerator compartment 51 are appropriately cooled and stored. When the detected temperature D1 of the refrigerator compartment 51 becomes equal to or lower than the refrigeration off temperature value Df1 (time t36), the refrigeration compartment electromagnetic valve 151 is turned off, and the detected temperature D2 of the freezer compartment 52 becomes the refrigeration off temperature value Df2. When the following occurs (time t37), the freezer compartment solenoid valve 152 is turned off.

  The bypass path 31, the electromagnetic valve 32, and the capillary tube 33 may be omitted.

It is a block block diagram which shows the freezer refrigerator which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows schematic structure of the freezer refrigerator which concerns on this invention. It is a flowchart which shows operation | movement of the control part which concerns on this invention. It is a flowchart which shows operation | movement of the control part which concerns on this invention. It is a flowchart which shows operation | movement of the control part which concerns on this invention. It is a flowchart which shows operation | movement of the control part which concerns on this invention. It is a flowchart which shows operation | movement of the control part which concerns on this invention. It is a flowchart which shows operation | movement of the control part which concerns on this invention. It is a timing chart which shows operation | movement of the refrigerator-freezer which concerns on this invention. It is a timing chart which shows operation | movement of the refrigerator-freezer which concerns on this invention.

Explanation of symbols

12 Compressor 51 Refrigerated chamber 52 Freezer chamber 61/62 Cooler 151/152 Solenoid valve 181/182 Temperature sensor

Claims (5)

Refrigeration room (51) and freezer room (52) whose front face is open, coolers (61 and 62) arranged in the refrigerator room (51) and freezer room (52), and the front opening of the cold room (51) Refrigerant having a door (10) that opens and closes and a door sensor (191) that detects the opening and closing of the door (10), and that is supplied from each compressor (12) to each cooler (61 and 62). Is a refrigerator-freezer in which the inside of the refrigerator compartment (51) and the freezer compartment (52) is cooled,
The refrigerators (61, 62) of the refrigerator compartment (51) and the freezer compartment (52) are connected to the compressor (12) via solenoid valves (151, 152), respectively, and the solenoid valves (151, 152). Is opened so that the refrigerant is supplied to the cooler (61, 62),
In the refrigerator compartment (51) and the freezer compartment (52), temperature sensors (181, 182) for detecting the internal temperature are arranged,
Based on the detected temperatures (D1 and D2) of the temperature sensors (181 and 182), the solenoid valves (151 and 152) so that the refrigerator compartment (51) and the freezer compartment (52) are within a predetermined temperature range. Control
After the door sensor (191) detects that the door (10) of the refrigerator compartment (51) has been opened, a predetermined waiting time (Lt) elapses after the door (10) is closed. When the solenoid valves (151 and 152) corresponding to the refrigerator compartment (51) and the freezer compartment (52) are both opened, the solenoid valve (151) corresponding to the refrigerator compartment (51) is closed, When the waiting time (Lt) elapses, the electromagnetic refrigerator (151) corresponding to the refrigerator compartment (51) is opened, and the refrigerator / freezer.   When the door sensor (191) detects that the door (10) of the refrigerator compartment (51) is opened, the solenoid valves (151 and 152) corresponding to the refrigerator compartment (51) and the freezer compartment (52) 2. The refrigerator-freezer according to claim 1, wherein when both are open, the solenoid valve (151) corresponding to the refrigerator compartment (51) is closed.   When only the solenoid valve (151) corresponding to the refrigerator compartment (51) is in an open state, the door sensor (191) detects that the door (10) of the refrigerator compartment (51) is closed, The refrigerator-freezer according to claim 1 or 2, wherein when the standby time (Lt) elapses, only the electromagnetic valve (152) corresponding to the freezer compartment (52) is opened.   By detecting that the solenoid valves (151 and 152) corresponding to the refrigerator compartment (51) and the freezer compartment (52) are both open and the door (10) of the refrigerator compartment (51) is opened, After the solenoid valve (151) corresponding to the refrigerator compartment (51) is closed, the freezer compartment (52) until the standby time (Lt) elapses after the door (10) of the refrigerator compartment (51) is closed. The refrigerator-freezer according to any one of claims 1 to 3, wherein when the electromagnetic valve (152) corresponding to) is closed, the electromagnetic valve (151) corresponding to the refrigerator compartment (51) is opened.   The temperature sensor (181) of the refrigerator compartment (51) when a predetermined waiting time (W) shorter than the waiting time (Lt) has elapsed since the door (10) of the refrigerator compartment (51) was closed. 5. The solenoid valve (151) corresponding to the refrigerator compartment (51) is opened when the detected temperature (D 1) is equal to or higher than a predetermined high temperature value (DH) set in advance. The refrigerator-freezer according to crab.

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