JP2005127661A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save energy and costs by controlling a current to flow in a heating device without using an outside temperature detecting device and to actualize a equalized room temperature by suppressing a sharp temperature change depending on whether the current flows or not in the heating device. <P>SOLUTION: A control board microcomputer 15 recognizes a stop time for a compressor 10 which repeats operation/stop to control the room temperature. A current flows in the temperature compensation heating device 12 at a time when it exceeds a set time, whereby the current is optimally controlled to flow in the temperature compensation heating device 12 without using the outside temperature detecting device. This saves energy and costs and suppresses the sharp temperature change depending on whether the current flows or not in the heating device, to keep the room temperature constant. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to energy saving, cost saving, and maintenance of temperature in a refrigerator in a refrigerator having a heater in the cabinet.

  Conventionally, in this type of refrigerator heater control, an outside air temperature detection device is disposed outside the cabinet (see, for example, Patent Document 1).

FIG. 11 shows an electric circuit diagram of the conventional heater energization control described in Patent Document 1. In FIG. As shown in FIG. 11, the compressor 1 that circulates and supplies the refrigerant to the refrigerator is controlled for cooling by the internal temperature control device 2, detects the opening and closing of the door by the switch 4, and contacts when the door is closed. The fan 3 for agitating the cold that is swung to 4a is connected to the refrigerator 1 in synchronization with the compressor 1, and when the door is opened, the interior light 5 to which the contact is swung and connected to 4b is connected. Lights up and detects the outside air temperature with the outside air temperature detection device 6 and only closes the circuit when the outside air temperature is lowered, and even if the door is closed, the inside light 5 is turned on to warm the inside and increase the operating rate. In this way, the freezing room is prevented from being slowly cooled.
Japanese Utility Model Publication No. 58-194480

  However, the above-described conventional configuration requires an outside air temperature detection device and increases costs, and the temperature balance in the chamber changes abruptly depending on whether the heating device installed in the chamber is energized, resulting in slow cooling and overcooling. There was a problem that the change width of the temperature inside the cabinet increased.

  The present invention solves the above-mentioned conventional problems, and can control the energization of the heat generating device without using the outside air temperature detecting device, realizes energy saving and saves a sudden temperature depending on whether the heat generating device is energized. It aims at providing the refrigerator which suppresses a change and can keep the internal temperature constant.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is a refrigerator in which the compressor temperature is controlled by repeatedly operating / stopping the compressor. The heat generating device provided in the cabinet is energized until the end of the stop.

  As a result, the energization control of the heat generating device is performed finely in conjunction with the actual internal heat absorption load fluctuation without using the outside air temperature detecting device, thereby realizing energy saving and cost saving. Moreover, it becomes possible to keep the internal temperature constant by gradually changing the energization of the heat generating device.

  In addition, the refrigerator of the present invention is provided in the refrigerator during the next stop of the compressor when the operation time of the compressor is less than the set time in the refrigerator that controls the internal temperature by repeatedly operating / stopping the compressor. The heating device is energized.

  This makes it possible to control energization of the heat generating device without using the outside air temperature detection device, and realizes energy saving, and suppresses sudden temperature change due to the presence or absence of power supply of the heat generating device, and keeps the internal temperature constant. be able to.

  The refrigerator of the present invention is a refrigerator that repeatedly controls the operation / stop of the compressor to control the internal temperature, and recognizes and compares the stop time of the compressor in a plurality of operation / stop cycles, and The energization control is performed on the heat generating device provided in the storage according to the difference in the stop time.

  This makes it possible to control energization of the heat generating device without using the outside air temperature detection device, and realizes energy saving, and suppresses sudden temperature change due to the presence or absence of power supply of the heat generating device, and keeps the internal temperature constant. be able to.

  The refrigerator of the present invention can control energization of the heat generating device without using an outside air temperature detection device, realizes energy saving and saves energy, and suppresses a sudden temperature change due to the presence / absence of energization of the heat generating device. Can be kept constant.

  In the refrigerator according to the first aspect of the present invention, in the refrigerator that repeatedly controls the operation / stop of the compressor to control the internal temperature, from the time when the stop time of the compressor exceeds the set time to the end of the stop of the compressor, Energizes the installed heat generating device, and can control the power supply of the heat generating device without using the outside air temperature detection device, realizes energy savings and suppresses sudden temperature changes depending on whether the heat generating device is energized. The inside temperature can be kept constant.

  The invention according to claim 2 is the invention according to claim 1, in which the operation / stop of the compressor is switched between two operation temperature tables depending on the situation, and suddenly depending on whether the heating device is energized or not. Therefore, it is possible to keep the temperature inside the chamber constant.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the operation / stop of the compressor is switched between two types of operating temperature width tables depending on the situation, and the heating device is energized. Regardless of the presence or absence, the inside temperature can be kept constant, and temperature variation can be suppressed by suppressing temperature fluctuation.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein a plurality of compressor stop set times are set, and the set times are switched according to the situation, The internal temperature can be kept constant regardless of whether the heat generating device is energized, and temperature variation can be suppressed by suppressing temperature fluctuation.

  In the refrigerator according to the fifth aspect of the present invention, in the refrigerator that repeatedly controls the operation / stop of the compressor to control the internal temperature, when the operation time of the compressor falls below the set time, the compressor is in the internal state during the next compressor stop. Energizes the installed heat generating device, and can control the power supply of the heat generating device without using an outside air temperature detection device, realizes energy savings and suppresses sudden temperature changes due to the presence or absence of power supply to the heat generating device. The inside temperature can be kept constant.

  According to the sixth aspect of the present invention, in the refrigerator that repeatedly controls the operation / stop of the compressor to control the internal temperature, the stop time of the compressor is recognized and compared in a plurality of operation / stop cycles, and the plurality of compressors Energization control is performed on the heat generating device provided in the cabinet according to the difference in the stop time, and the power supply control of the heat generating device can be performed without using the outside air temperature detection device, realizing energy saving and cost saving, and heat generation A rapid temperature change due to the presence or absence of energization of the apparatus can be suppressed, and the internal temperature can be kept constant.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects of the present invention, the compressor has a refrigerator compartment and a freezer compartment, and a compressor is operated by a temperature sensor provided in the refrigerator compartment. / Stop control is performed, and a damper (air flow control device) for controlling the temperature in the refrigerator compartment is not required, and the cost can be reduced.

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

(Embodiment 1)
1 is a cross-sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a control circuit diagram of the refrigerator according to the embodiment, and FIG. 3 is a compression of the refrigerator according to the embodiment of the present invention at a high outside temperature. 4 is an operation time chart of the compressor and the heating device, FIG. 4 is an operation time chart of the compressor and the heating device when the endothermic load in the refrigerator according to the embodiment of the invention is fluctuated, and FIG. 5 is a diagram of the refrigerator of the embodiment of the invention. The operation time chart of the compressor and heat generating apparatus at the time of low outside temperature is shown.

  1 and 2, a compressor 10 is provided in the lower rear machine room of the refrigerator 7, a defrosting heating device 11 is installed in the lower part of the cooler, and a cold air circulation fan 13 is installed in the upper part of the refrigerator 8. And the freezer compartment 9 is cooled. An internal temperature sensor 14 and a temperature compensation heating device 12 are installed in the refrigerator compartment 8 to detect the internal temperature and the operation of the compressor 10 is controlled by the control board microcomputer 15. The control board microcomputer 15 is programmed to recognize the stop time immediately before the compressor 10 that is repeatedly operated / stopped in order to control the internal temperature, and to control the energization of the heat generating device according to the stop time. ing.

  The operation and action of the refrigerator configured as described above will be described below with reference to the time charts of FIGS.

  First, when the air temperature is high, the operation / stop operation of the compressor 10 has a large heat absorption load on the refrigerator, the operation rate increases, the stop time 17 is shortened, and the control board microcomputer 15 sets the stop time 17b just before the set time. 16 (preliminary stop time at the outside temperature at which the heating device 12 needs to be energized) is not exceeded, an instruction not to energize the heating device 12 during the next stop time 18b is issued, and each stop time is detected. As a result, the heat generating device 12 is not always energized at high, medium and external temperatures.

  At the low outside temperature, the operation / stop operation of the compressor 10 has a small endothermic load on the refrigerator, so the operation rate is reduced and the stop time 19 is extended, and the control board microcomputer 15 sets the stop time 19b immediately before the set time 16. It is determined that the temperature has been exceeded, an instruction to energize the heat generating device 12 during the next stop time 20b is issued, and the heat generating device 12 is always energized at a low outside temperature by detecting the stop time every time.

  The operation / stop operation of the compressor 10 varies between the mid-outside air temperature and the low outside air temperature, or when the internal heat absorption load fluctuates, the heat absorption load to the refrigerator fluctuates, so that the operation rate changes dynamically and the stop time 21 also changes each time. Therefore, the control board microcomputer 15 compares with the set time 16 according to the immediately preceding stop time 21b, gives an instruction every time whether or not the heating device 12 is energized during the next stop time 22b, and stops every time. By detecting this, the energization time of the heat generating device 12 is gradually changed when the outside air temperature and the endothermic load fluctuate. In addition, by turning on the heat generating device when each stop time exceeds the set time, without waiting until the next stop time for the endothermic load fluctuation, it is possible to respond immediately and smoothly without changing the temperature of the outside air temperature detector. The energization control of the heat generating device can be performed, energy saving and cost saving can be realized, and a rapid temperature change can be suppressed depending on whether the heat generating device is energized or not, and the internal temperature can be kept constant.

(Embodiment 2)
FIG. 6 shows a time chart of the operating temperature and the internal temperature of the refrigerator in Embodiment 2 of the present invention.

  In FIG. 6, the compressor 10 is controlled by the control board microcomputer 15 to operate when the temperature of the internal temperature sensor 14 becomes Ton and to stop when the temperature becomes Toff.

About the control of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
First, in the temperature time chart of the internal temperature sensor 14, the temperature behavior 26 when the heating device 12 is not energized during the stop time of the compressor 10 is less than the behavior 25 when energization is less. The temperature rise rate is slow. ((T5-t1)> (t2-t1)) Therefore, if controlled by the first operating temperature table 23 (Ton / Toff), the internal temperature change causes the heating device 12 to be energized during the stop time of the compressor 10. Compared with the change 27 when the power is supplied, the temperature change 28 when not being turned on increases the PCmax temperature to the PC'max temperature as the stop time becomes longer. It becomes 'ave' and it becomes slow cooling by the difference 29. Since the control board microcomputer 15 has a second operating temperature table 24 for correcting the operating temperature Ton / Toff by the difference 29 when the heat generating device 12 is not energized, the temperature change 28 is a temperature change. Corrected by the change 31, the in-compartment average temperature PC ″ ave becomes the same as PCave and can always be kept constant.

  Further, since the control board microcomputer 15 has two types of operating temperature width tables for correcting the internal temperature change width 33 (PCmax-PCmin) when the heat generating device 12 is not energized, it is used properly. The temperature change width 33 is corrected to the second operating temperature width table 34, the temperature change 31 becomes the temperature change 35, and the internal temperature change width 36 is the internal temperature change controlled by the first operating temperature width table 30. It becomes the same as the width 32 and can always be kept constant, and temperature variation can be suppressed by suppressing temperature fluctuation.

  Further, the control board microcomputer 15 has two kinds of set times for each operating temperature table to be switched according to the stop time of the compressor 10, so that the first from the operating temperature table 23 in which the heat generating device 12 is energized. Switching stop time 37 and switching stop time 38 from the operating temperature table 24 in which the heat generating device 12 is not energized are used separately, so that the heat generating device 12 is switched from energized to de-energized (low outside temperature → High / mid / outside temperature) and switching from non-energized to energized (high / mid / outside temperature → low outside temperature) can be set freely and can be switched at the same time, so it can always be kept constant and temperature The temperature can be equalized by suppressing the fluctuation.

(Embodiment 3)
FIG. 7 is an operation time chart of the compressor and the heat generating device at the time of high / mid / outside air temperature of the refrigerator in Embodiment 3 of the present invention, and FIG. 8 is a compressor at the time of endothermic load fluctuation of the refrigerator in the same embodiment. FIG. 9 shows an operation time chart of the heat generating device, and FIG. 9 shows an operation time chart of the compressor and the heat generating device when the refrigerator is at a low outside temperature.

  The control board microcomputer 15 is programmed to recognize the operation time immediately before the compressor 10 that is repeatedly operated / stopped in order to control the internal temperature, and to control the energization of the heat generating device according to the operation time. ing.

  The operation and action of the refrigerator configured as described above will be described below with reference to FIGS.

  First, when the air temperature is high, the operation / stop operation of the compressor 10 has a large endothermic load on the refrigerator, so that the operation rate increases and the operation time 40 is extended, and the control board microcomputer 15 sets the previous operation time 40b to the set time. 39 (previously, the operating time at the outside air temperature at which the heat generating device 12 needs to be energized) is exceeded and an instruction not to energize the heat generating device 12 during the next stop time 41b is issued, and the operating time of each time is detected. Thus, the heat generating device 12 is not always energized at high, medium and external temperatures.

  At the low outside temperature, the operation / stop operation of the compressor 10 has a small endothermic load on the refrigerator, so the operation rate is reduced and the operation time 42 is shortened, and the control board microcomputer 15 sets the operation time 42b immediately before the set time 39. It is determined that the temperature does not exceed, and an instruction to energize the heat generating device 12 during the next stop time 43b is issued. By detecting the operation time every time, the heat generating device 12 is always energized at a low outside temperature.

  The operating / stopping operation of the compressor 10 varies between the middle and outside air temperature and the low outside air temperature, or the heat absorption load on the refrigerator fluctuates. Therefore, the control board microcomputer 15 compares with the set time 39 in accordance with the previous operation time 44b, gives an instruction every time whether or not the heating device 12 is energized during the next stop time 45b, and each operation time. By detecting this, the energization time of the heat generating device 12 is gradually changed when the outside air temperature and the endothermic load fluctuate. In addition, by turning on the heating device when each operation time divides the set time, without waiting until the next stop time for the endothermic load fluctuation, it is possible to respond immediately and smoothly without changing the temperature detection device. The energization control of the heat generating device can be performed, energy saving and cost saving can be realized, and a rapid temperature change can be suppressed depending on whether the heat generating device is energized or not, and the internal temperature can be kept constant.

(Embodiment 4)
FIG. 10 shows a control flowchart of the refrigerator in the fourth embodiment of the present invention.

  Further, the control board microcomputer 15 recognizes the stop time of the compressor 10 that is repeatedly operated / stopped in order to control the internal temperature, compares the stop times of the two adjacent compressors, and determines the difference time. In accordance with the set time, the energization of the heat generating device is controlled, and two kinds of operation temperature tables are switched and controlled.

  About the control of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In FIG. 10, at the time of high / medium / outside air temperature, the operation / stop operation of the compressor 10 has a large heat absorption load on the refrigerator, so that the operation rate increases and the stop time Th is shortened. If the stop time Th (n) does not exceed the set time T1 (preliminary stop time at the outside temperature that requires energization of the heat generating device 12), an instruction not to energize the heat generating device 12 during the (n + 1) th stop time is issued. At the same time, an instruction to switch the (n + 1) th temperature control table to the HT table (temperature control table without a heating device at high / mid / outside air temperature) is issued (from STEP 1 to STEP 2). By detecting the stop time each time, the heat generating device 12 is not always energized at the time of high, medium and external temperatures, and the temperature control table is always set to the HT table.

  When the outside air temperature is low, the operation / stop operation of the compressor 10 has a small endothermic load on the refrigerator, so that the operation rate is reduced and the stop time Tl is extended, so that the control board microcomputer 15 immediately stops the n-th stop time Tl (n ) Exceeds the set time 46 (T1), and an instruction to energize the heating device 12 during the (n + 1) th stop time is issued, and the (n + 1) th temperature control table is set to the LT table (at the low outside temperature, the heating device). An instruction to switch to the existing temperature control table is issued (from STEP 1 to STEP 3). Further, the control board microcomputer 15 compares the difference between the n + 1 stop time Tl (n + 1) and Tl (n) (STEP 4). At the low outside temperature, the control board microcomputer 15 affects the heat generation load of the heat generating device 12 more than the heat absorption load outside the warehouse. Therefore, it is determined that the set time T2 has been exceeded and an instruction is given to energize the heat generating device 12 during the n + 2 stop time, and the temperature of the n + 2th time. An instruction to switch the control table to the LT table is issued (from STEP 4 to STEP 5). By detecting the operation time each time, the heat generating device 12 is always energized at a low outside temperature.

  The operation / stop operation of the compressor 10 varies between the middle and outside air temperature and the low outside air temperature, or when the internal heat absorption load fluctuates. Therefore, the control board microcomputer 15 determines that the previous n-th stop time Tm (n) has exceeded the set time T1, and issues an instruction to energize the heating device 12 during the (n + 1) th stop time, and n + 1 Although the instruction to switch the temperature control table for the first time to the LT table is once issued, the control board microcomputer 15 compares the difference between the stop time Tm (n + 1) and Tm (n) for the (n + 1) th time, and at the time of switching transient temperature Since the influence of the heat absorption load outside the chamber is larger than the heat generation load of the heat generating device 12, the reduction time of the stop time due to the energization of the heat generating device 12 is small, and it stops even when the heat generating device 12 is energized. It is determined that the set time T2 is not exceeded, and an instruction not to energize the heating device 12 during the n + 2 stop time is issued and an instruction to switch the n + 2 temperature control table to the HT table is issued. (From STEP4 to STEP6). By switching and controlling the temperature control table alternately during the transitional period, the energization control of the heat generating device can be performed without using the outside air temperature detection device due to the smooth temperature change even when the outside air temperature and the endothermic load fluctuate. In addition to realizing cost savings, a rapid temperature change can be suppressed depending on whether or not the heat generating device is energized, and the internal temperature can be kept constant.

  As described above, the refrigerator according to the present invention can control the energization of the heat generating device without using the outside air temperature detecting device, realizes energy saving and a rapid temperature change depending on whether the heat generating device is energized. Since it is possible to keep the inside temperature constant, it can be applied to refrigeration equipment such as a wine cellar.

Sectional drawing and control circuit diagram of the refrigerator in Embodiment 1 of this invention Control circuit diagram of the refrigerator of the same embodiment Operation time chart of compressor and heat generating device at high outside temperature of refrigerator in embodiment of same invention Operation time chart of compressor and heat generating device at the time of endothermic load fluctuation of refrigerator in embodiment of same invention Operation time chart of compressor and heat generating device at low outside temperature of refrigerator in embodiment of same invention Time chart of operating temperature and internal temperature of refrigerator in embodiment 2 of the present invention Operation time chart of compressor and heat generating device at high / mid / outside air temperature of refrigerator in embodiment 3 of the present invention Operation time chart of compressor and heat generating device at the time of endothermic load fluctuation of refrigerator in the same embodiment Operation time chart of compressor and heat generating device at low outside temperature of refrigerator in the embodiment Control flow chart of refrigerator in Embodiment 4 of the present invention Electric circuit diagram of conventional heater energization control

Explanation of symbols

7 Refrigerator 8 Refrigerator 9 Freezer 10 Compressor 11 Defrosting Heating Device 12 Temperature Compensating Heating Device 14 Internal Temperature Sensor 16, 39 Set Time 23 First Operating Temperature Table 24 Second Operating Temperature Table 30 First operating temperature range table 34 Second operating temperature range table

Claims (7)

In a refrigerator that controls the internal temperature by repeatedly operating / stopping the compressor, energizing the heating device provided in the internal compartment from when the compressor stop time exceeds the set time until the compressor stops. Features a refrigerator. 2. The refrigerator according to claim 1, wherein the internal temperature is controlled by switching the operation / stop of the compressor between two types of operating temperature tables according to the situation. The refrigerator according to claim 1 or 2, wherein the internal temperature is controlled by switching the operation / stop of the compressor according to a situation between two kinds of operating temperature width tables. The refrigerator according to any one of claims 1 to 3, wherein a plurality of compressor stop set times are set, and the set times are switched according to the situation. In a refrigerator that controls the internal temperature by repeatedly operating / stopping the compressor, if the operating time of the compressor falls below the set time, it is necessary to energize the heating device provided in the internal storage during the next compressor stop. Features a refrigerator. In a refrigerator that controls the internal temperature by repeatedly operating / stopping the compressor, the stop time of the compressor is recognized and compared in a plurality of operation / stop cycles, and the refrigerator is stored according to the difference in the stop time of the plurality of compressors. A refrigerator characterized by energizing control of a heat generating device provided in the inside. 7. The compressor operation / stop control according to claim 1, further comprising: a refrigerator compartment and a freezer compartment, wherein the compressor temperature is controlled by an internal temperature sensor provided in the refrigerator compartment. refrigerator.

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