JP2009008281A - refrigerator - Google Patents

Abstract

[PROBLEMS] To reliably defrost a refrigerator for a refrigerator while solving the problem of excessive temperature increase in the refrigerator.
A transition from a freezer cooling operation by a freezer cooler to a refrigerating room cooling operation by a freezer cooler is performed based on a detection result of a refrigerating room temperature sensor, and cooling of the freezer room is performed. Two refrigerations that detect the temperature of two locations of the refrigerator for the refrigerator compartment when the refrigerator for the refrigerator compartment is defrosted by the operation of the fan for the refrigerator compartment during operation and the refrigerator for the refrigerator compartment is defrosted. When the defrosting of the freezer cooler is performed on the condition that the detected temperature of both or one of the room cooler temperature sensors does not reach the predetermined temperature a predetermined number of times, the refrigerating room cooler is removed. The frost heater was activated.
[Selection] Figure 1

Description

  The present invention relates to an improved refrigerator for defrosting a refrigerator for a refrigerator.

  Conventionally, in a refrigerator, a freezer room and a refrigerator room are provided, a refrigerator for a freezer room used for cooling the freezer room, a refrigerator for a refrigerator room used for cooling the refrigerator room, and air in the refrigerator room are refrigerated. Refrigeration room fan that circulates in contact with the room cooler, refrigeration room cooler defrost heater that heats the refrigeration room cooler, refrigeration room temperature sensor that detects the temperature of the refrigeration room, and refrigeration room cooling The refrigerator temperature sensor for detecting the temperature of the refrigerator is provided, and the transition from the cooling operation of the freezer compartment by the refrigerator for the freezer to the cooling operation of the refrigerator compartment by the refrigerator for the refrigerator compartment is performed. Based on the detection result of the refrigerator temperature sensor and the detection result of the refrigerated room temperature sensor, the refrigeration room cooler is defrosted by operating the refrigerator defrost heater during the cooling operation of the freezer room. What has been provided.

  FIG. 11 shows the control mode of the refrigerator itself. During the freezer cooling operation (F cooling) by the freezer cooler, the refrigerator freezer defrost heater is operated (ON) to operate the refrigerator freezer. Is defrosted. Then, as the temperature of the refrigerator cooler rises, the temperature detected by the refrigerator temperature sensor also rises, and when it reaches the defrosting end temperature, the refrigerator cooler defrost heater is stopped. (OFF) completes the defrosting of the refrigerator for the refrigerator compartment. At this time, the cooling operation of the freezer compartment by the freezer cooler is also terminated.

  Next, the cooling operation of the refrigerating room is started by the refrigerating room cooler, and as a result, the temperature of the refrigerating room cooler is lowered, the temperature of the refrigerating room is lowered, and the detection of the refrigerating room cooler temperature sensor. The temperature also falls. When the temperature of the refrigerator compartment decreases to a predetermined temperature (refrigeration chamber cooling end temperature), the refrigerator room temperature sensor detects this, and the cooling operation of the refrigerator compartment by the refrigerator for the refrigerator compartment is terminated. The cooling operation of the freezer compartment by the room cooler is started, and the refrigerator defrost heater for the refrigerator compartment is operated to defrost the refrigerator for the refrigerator compartment.

  In short, the transition from the freezer cooling operation by the freezer cooler to the refrigerating room cooling operation by the freezer cooler is performed based on the detection result of the freezer cooler temperature sensor. Of these, during the cooling operation of the freezer compartment, the refrigerator for the refrigerator compartment is defrosted by the operation of the refrigerator defrost heater for the refrigerator compartment.

  However, in this case, the end of the defrosting of the refrigerator for the refrigerator compartment is based on the detected temperature of the refrigerator temperature sensor for the refrigerator compartment, and the previous defrosting of the refrigerator for the refrigerator compartment is performed for the refrigerator compartment. Since it is performed by the operation of the cooler defrost heater, at the end of the defrosting of the refrigerator for the refrigerator compartment, the temperature of the refrigerator compartment has risen too much, and generally the temperature ( The temperature in the refrigerator compartment is over the required temperature), and there is a problem of so-called overheating of the refrigerator compartment.

In contrast, the defrosting of the refrigerating room cooler is terminated based on the detected temperature of the refrigerating room temperature sensor, and the previous defrosting of the refrigerating room cooler is performed by operating the refrigerating room fan. If this is done, as shown in FIG. 12, the temperature of the refrigerating room is kept up to the temperature at which the rise should be transferred to the cooling operation of the refrigerating room (refrigerating room cooling required temperature), thereby solving the problem of overheating. it can.
However, in that case, the temperature of the refrigerator for the refrigerator compartment does not rise to a predetermined temperature (defrosting end temperature), and there is a problem that the refrigerator for the refrigerator compartment is not reliably defrosted. .

In order to sufficiently defrost the refrigerator for the refrigerator compartment, refrigerator temperature sensors for the refrigerator compartment are provided at two locations (the inlet side and the outlet side) of the refrigerator for the refrigerator compartment, respectively. The refrigerator defrost heater for the refrigerator compartment is operated until both the cooler temperature sensors detect a predetermined temperature (defrosting end temperature), and when detected, the refrigerator defrost heater for the refrigerator compartment is stopped. Some have been considered (for example, refer to Patent Document 1).
JP 2004-19950 A

  In the case of what has been considered as described above, the defrosting of the refrigerator for the refrigerator compartment can be performed reliably (so as not to generate the defrosting residue) by the action of the two refrigerator temperature sensors. At the end of defrosting, it is considered that the temperature of the refrigerator compartment is excessively increased, and the problem of excessive temperature increase in the refrigerator compartment cannot be solved.

  The present invention has been made in view of the above-described circumstances, and the object thereof is to provide a refrigerator capable of surely defrosting a refrigerator for a refrigerator while solving the problem of excessive temperature increase in the refrigerator. is there.

  In order to achieve the above object, in the refrigerator of the present invention, firstly, a freezer compartment and a refrigerator compartment are provided, a freezer cooler for cooling the freezer compartment, and cooling of the refrigerator compartment is provided. A refrigerating room cooler to be provided; a refrigerating room fan that circulates air in the refrigerating room in contact with the refrigerating room cooler; a refrigerating room cooler defrost heater that heats the refrigerating room cooler; A refrigerating room using a refrigerating room cooler, comprising: a refrigerating room temperature sensor for detecting the temperature of the refrigerating room; and two refrigerating room cooler temperature sensors for detecting two temperatures of the refrigerating room cooler. Transition from the cooling operation of the refrigerator to the cooling operation of the refrigerating room by the refrigerating room cooler based on the detection result of the refrigerating room temperature sensor, and during the cooling operation of the freezing room, by the operation of the refrigerating room fan Defrosting the refrigerator for the refrigerator compartment In addition, when the defrosting of the refrigerator for the refrigerator compartment is performed, on the condition that the detection temperature of both or one of the two refrigerator compartment temperature sensors does not reach the predetermined temperature, the predetermined number of times. The refrigeration room cooler defrost heater is operated when defrosting the freezer cooler (invention of claim 1).

  In the refrigerator of the present invention, secondly, including a freezer compartment and a refrigerator compartment, a refrigerator for a freezer compartment provided for cooling the refrigerator compartment, a refrigerator for refrigerator compartment provided for cooling the refrigerator compartment, Refrigerating room fan that circulates air in the refrigerating room in contact with the refrigerating room cooler, a refrigerating room cooler defrost heater that heats the refrigerating room cooler, and a temperature of the refrigerating room is detected. A refrigerating room temperature sensor, and two refrigerating room cooler temperature sensors for detecting temperatures at two locations of the refrigerating room cooler, and the refrigerating room cooling operation by the freezing room cooler is performed for the refrigerating room. Transition to the cooling operation of the refrigerating room by the cooler is performed based on the detection result of the refrigerating room temperature sensor, and during the cooling operation of the freezing room, the refrigerating room cooler is removed by the operation of the refrigerating room fan. Remove frost from the refrigerator for the refrigerator. When the refrigeration chamber fan is operated, the refrigeration chamber is operated on the condition that the detected temperature of both or one of the two refrigeration chamber cooler temperature sensors does not reach a predetermined temperature. The cooling device defrosting heater is operated (invention of claim 2).

  In the refrigerator of the present invention, thirdly, a freezer compartment and a refrigerator compartment, a refrigerator for a freezer compartment for cooling the refrigerator compartment, a refrigerator refrigerator compartment for cooling the refrigerator compartment, Refrigerating room fan that circulates air in the refrigerating room in contact with the refrigerating room cooler, a refrigerating room cooler defrost heater that heats the refrigerating room cooler, and a temperature of the refrigerating room is detected. A refrigerating room temperature sensor, and two refrigerating room cooler temperature sensors for detecting temperatures at two locations of the refrigerating room cooler, and the refrigerating room cooling operation by the freezing room cooler is performed for the refrigerating room. Transition to the cooling operation of the refrigerating room by the cooler is performed based on the detection result of the refrigerating room temperature sensor, and during the cooling operation of the freezing room, the refrigerating room cooler is removed by the operation of the refrigerating room fan. Remove frost from the refrigerator for the refrigerator. On the condition that the detected temperature of both or one of the two refrigeration room cooler temperature sensors does not reach a predetermined temperature, the defrosting of the freezer cooler immediately after is performed. The refrigeration room cooler defrosting heater is operated when the refrigeration room fan is operated from the time when the refrigeration room cooler is defrosted to the next time. Invention of 3).

  In these cases, it is a condition that when the defrosting of the refrigerator for the refrigerator compartment is performed, it is a predetermined number of times that the detected temperature of both or one of the two refrigerator compartment temperature sensors does not reach the predetermined temperature. Instead of this, it is also possible to make it a condition that the detected temperature difference between the two cooler temperature sensors for the refrigerator compartment is equal to or greater than a predetermined value (invention of claim 4).

Fourthly, the refrigerator of the present invention has a refrigerator compartment,
A refrigerating room cooler for cooling the refrigerating room;
A refrigerating room fan for circulating air in the refrigerating room in contact with the refrigerating room cooler;
Two cold room temperature sensors for detecting the temperature at two locations above and below the cold room cooler,
The defrosting of the refrigerator for the refrigerator compartment is performed by blowing air from below to the refrigerator for the refrigerator compartment with the fan for the refrigerator compartment,
When the defrosting of the refrigerator for the refrigerator compartment is performed, if the detected temperature of the refrigerator temperature sensor for the upper refrigerator compartment of the two refrigerator compartment temperature sensors does not reach a predetermined temperature, The direction of the air blowing by the refrigerator fan is reversed (invention of claim 5).

  According to the first means (invention of claim 1), the cooling operation of the refrigerating room (end of defrosting of the refrigerating room cooler) by the refrigerating room cooler is performed based on the temperature detected by the refrigerating room temperature sensor. At the same time, since the defrosting of the refrigerator for the refrigerator compartment is performed by the operation of the fan for the refrigerator compartment, the temperature of the refrigerator compartment is the temperature at which the rise should be transferred to the cooling operation of the refrigerator compartment (the temperature required for the refrigerator compartment cooling). ) Until the problem of overheating can be solved.

  In that case, the temperature of the refrigerator for the refrigerator compartment may not rise to a predetermined temperature (defrosting end temperature), and the detected temperature of both or one of the two refrigerator compartment temperature sensors becomes the predetermined temperature. However, at that time, when the defrosting of the freezer cooler is performed, the refrigerator defrost heater is operated, so that the defrosting of the refrigerator cooler is surely performed. Done. In addition, in this case, since there are two refrigerator temperature sensors for the refrigerator compartment and detects the temperatures at two locations of the refrigerator for the refrigerator compartment, the refrigerator for the refrigerator compartment is more reliably defrosted.

  According to the second means (invention of claim 2), the cooling operation of the refrigerating room by the refrigerating room cooler (end of defrosting of the refrigerating room cooler) is performed based on the detected temperature of the refrigerating room temperature sensor, Since the defrosting of the refrigerator for the refrigeration room is performed by the operation of the fan for the refrigeration room, the temperature of the refrigeration room reaches the temperature at which the rise should be transferred to the cooling operation of the refrigeration room (refrigerating room cooling required temperature). The problem of overheating can be solved.

  In that case, the temperature of the refrigerator for the refrigerator compartment may not rise to a predetermined temperature (defrosting end temperature), and the detected temperature of both or one of the two refrigerator compartment temperature sensors becomes the predetermined temperature. However, at that time, since the refrigerator defrost heater for the refrigerator compartment is operated when the fan for the refrigerator compartment is operated, the defrost of the refrigerator for the refrigerator compartment is further improved by both of these actions. Surely done. Furthermore, also in this case, since there are two refrigerator temperature sensors for the refrigerator compartment and detects the temperatures at two locations of the refrigerator for the refrigerator compartment, the defrosting of the refrigerator for the refrigerator compartment is performed more reliably.

  According to the third means (invention of claim 3), the cooling operation of the refrigerating room by the refrigerating room cooler (end of defrosting of the refrigerating room cooler) is performed based on the detected temperature of the refrigerating room temperature sensor, Since the defrosting of the refrigerator for the refrigeration room is performed by the operation of the fan for the refrigeration room, the temperature of the refrigeration room reaches the temperature at which the rise should be transferred to the cooling operation of the refrigeration room (refrigerating room cooling required temperature). The problem of overheating can be solved.

  In that case, the temperature of the refrigerator for the refrigerator compartment may not rise to a predetermined temperature (defrosting end temperature), and the detected temperature of both or one of the two refrigerator compartment temperature sensors becomes the predetermined temperature. However, in such a case, refrigeration should be performed during the operation of the refrigeration room fan from the time when the refrigeration unit cooler is immediately defrosted to the time when the next refrigeration unit cooler is defrosted. Since the room cooler defrosting heater is operated, the defrosting of the refrigerator for the refrigerating room is more reliably performed by these actions.

In addition, the operation of the refrigerator defrost heater for the refrigerator compartment is performed by removing the cooler for the freezer immediately after the detection temperature of both or one of the two refrigerator temperature sensors does not reach the predetermined temperature. Refrigerating room cooler by operating the refrigerator defrost heater in conjunction with the operation of the refrigerator fan in combination with the operation of the refrigerating room fan by frosting until the next defrosting of the refrigerator for freezing room The defrosting can be performed in a limited manner, so that the cooling of the refrigerator compartment is not neglected.
Furthermore, also in this case, since there are two refrigerator temperature sensors for the refrigerator compartment and detects the temperatures at two locations of the refrigerator for the refrigerator compartment, the defrosting of the refrigerator for the refrigerator compartment is performed more reliably.

  In these cases, when the defrosting of the refrigerator for the refrigerator compartment is performed, it is a condition that the detected temperature of both or one of the two refrigerator compartment temperature sensors does not reach the predetermined temperature for a predetermined number of times. In place of the above, the same effect can be obtained even when the difference between the detected temperatures of the two cooler temperature sensors for the refrigerator compartment is equal to or greater than a predetermined value (the invention of claim 4). can get.

  According to the fourth means (the invention of claim 5), the defrosting of the refrigerator for the refrigerator compartment is performed by blowing air from the lower side to the upper side of the refrigerator for the refrigerator compartment by the fan for the refrigerator compartment. The air whose temperature has been increased by cooling the chamber is brought into contact with the refrigerator for the refrigerator compartment from the lower part to the upper part, so that the defrosting of the refrigerator for the refrigerator compartment can be performed from the lower part to the upper part. In this case, if frost remains on the upper part of the refrigerator for the refrigerator compartment, the temperature detected by the upper refrigerator compartment temperature sensor does not reach the predetermined temperature. By reversing the direction of the air blown by the room fan, the refrigerated room cooler is brought into contact with the air that has risen in temperature from the upper part to the lower part. From this, the defrosting of the refrigerator for the refrigerator compartment is surely performed.

  In addition, in this case, since reliable defrosting of the refrigerator for the refrigerator compartment can be performed by reversing the blowing direction, the cooling operation of the refrigerator compartment by the refrigerator for the refrigerator compartment (end of the defrosting of the refrigerator for the refrigerator compartment) This can be performed based on the temperature detected by the refrigerated room temperature sensor without depending on the detection result of the room chiller temperature sensor. Room temperature), and the problem of excessive temperature increase in the refrigerator can be solved.

Hereinafter, a first embodiment (first embodiment) of the present invention will be described with reference to FIGS.
First, FIG. 5 shows the overall configuration of the refrigerator, and the inside of the main body cabinet 1 is refrigerated room 5, specification switching room 6, vegetable room in order from the top by three upper and lower intermediate partition walls 2, 3, and 4. 7 and freezer compartment 8.

The refrigerator compartment 5 is provided with a plurality of shelves 9, a container 10 is provided below them, and a container 11 is provided in the specification switching chamber 6. In addition, the vegetable compartment 7 is provided with containers 12 and 13 above and below, and the freezer compartment 8 is also provided with containers 14 and 15 above and below.
Two cooler chambers 18 and 19 are provided in the back from the specification switching chamber 6 to the vegetable chamber 7 by two front and rear partition walls 16 and 17, of which a cooler 20 for a refrigerator compartment is placed in the front cooler chamber 18. And a freezer compartment fan 21 and a freezer compartment cooler 22 and a freezer compartment fan 23 in the rear cooler compartment 19.

  The refrigerator 20 for the refrigerator compartment is used for cooling the refrigerator compartment 5 and the specification switching chamber 6 and the vegetable compartment 7 at the time of the refrigeration specification, and the fan 21 for the refrigerator compartment is the refrigerator 21 and the specification switching chamber 6 and the vegetable at the time of the refrigeration specification. The air in the chamber 7 is circulated as shown by the arrow in FIG. 5 in contact with the refrigerator 20 for the refrigerator compartment, and in particular, the refrigerator 20 for the refrigerator compartment is blown upward from below. It is supposed to be.

On the other hand, the freezer cooler 22 serves to cool the freezer compartment 8 and the specification switching chamber 6 at the time of freezing specifications, and the freezer fan 23 freezes the air in the freezer compartment 8 and the specification switching chamber 6 at the time of freezing specifications. It is made to contact with the room cooler 22 and circulate similarly as shown by an arrow in FIG.
Further, a refrigeration room temperature sensor 24 for detecting the temperature of the refrigeration room 5 is disposed at the inlet portion of the refrigeration room 5 in the air circulation path of the refrigeration room 5. A freezing room temperature sensor 25 for detecting the temperature of the freezer compartment 8 is disposed at the entrance portion of the freezer 8.

  The refrigerating room cooler 20 is provided with a refrigerating room cooler defrost heater 26 made of, for example, an aluminum foil heater for heating the refrigerating room cooler 20, and the freezing room cooler 22 is heated by, for example, a pipe. A freezer cooler defrost heater 27 comprising a heater is provided. Further, the refrigerator 20 for the refrigerator compartment is provided with first and second refrigerator temperature sensors 28 and 29 for detecting the temperatures of the two locations, for example, the upper and lower portions, and the freezer The room cooler 22 is provided with a freezer room cooler temperature sensor 30 for detecting the temperature of the upper part of the room cooler 22, for example.

  In addition, doors 31, 32, 33, and 34 for opening and closing the front openings of the refrigerator compartment 5, the specification switching compartment 6, the vegetable compartment 7, and the freezer compartment 8 are pivoted in the main body cabinet 1, The door 31 that opens and closes the opening of the refrigerator compartment 5 is provided with a plurality of pockets 35 on the back side.

  A machine room 36 is formed at the lower back of the main body cabinet 1, and a compressor 37 is disposed in the machine room 36. FIG. 6 shows a refrigeration cycle 38 mainly composed of a compressor 37. In this refrigeration cycle 38, a three-way valve which is a refrigerant flow path switcher from a discharge portion 37 a of the compressor 37 via a condenser 39. 40 inlet portions 40a are connected. Then, the other outlet portion 40c of the three-way valve 40 passes through one outlet portion 40b of the three-way valve 40 through the first capillary tube 41, which is a freezing restrictor, the cooler 22 for freezer compartment, and the accumulator 42 in this order. Are connected to the suction portion 37b of the compressor 37 through the second capillary tube 43, which is a refrigerator for refrigeration, and the cooler 20 for refrigeration chamber in order.

  FIG. 7 shows a control device 44 which is a control means for controlling the overall operation of the refrigerator. The control device 44 is composed of, for example, a microcomputer, and various operation signals are input from an operation input unit 45 including various operation switches provided in an operation panel (not shown), and the refrigeration room temperature sensor 24, the freezing room temperature sensor 25, Temperature detection signals are input from the first refrigerator temperature sensor 28, the second refrigerator temperature sensor 29, and the freezer temperature sensor 30, respectively.

  And the control apparatus 44 is based on those inputs and the control program memorize | stored previously, the said refrigerator 21 for refrigerator compartments, the fan 23 for freezer compartment, the refrigerator defrost heater 26 for refrigerator compartments, and the refrigerator for freezer compartments The defrost heater 27, the compressor 37, and the three-way valve 40 are controlled via a drive circuit 46.

Next, the operation of the above configuration will be described.
2 to 4 show the control contents of the control device 44. First, as shown in FIG. 2, when the operation of the control device 44 is started (started), "F cooling" is performed (step S1). This “F cooling” is an operation for cooling the freezing room 8 and the specification switching room 6 at the time of freezing. Specifically, one outlet portion 40b of the three-way valve 40 is opened while the compressor 37 is driven. (The other outlet 40c is closed) and the freezer compartment fan 23 is driven.

  Thus, in the refrigeration cycle 38, the refrigerant compressed by the compressor 37 and condensed by the condenser 39 passes through the first capillary tube 41, is evaporated by the freezer cooler 22, passes through the accumulator 42, and then the compressor The cycle returning to 37 is repeated, whereby the freezer cooler 22 is cooled. At this time, the freezer compartment fan 23 circulates the air in the freezer compartment 8 and the specification changeover compartment 6 at the time of the freezing specification in contact with the freezer compartment cooler 22, so that the specifications of the freezer compartment 8 and the freezing specification are used. The switching chamber 6 is cooled.

  At this time, "R fan driving" is performed (step S2). The “R fan” is a refrigeration room fan 21, and by driving the refrigeration room fan 21, the air in the refrigeration room 5, the specification switching room 6 at the time of the refrigeration specification, and the vegetable room 7 are circulated in contact with the refrigeration room cooler 20. The

  Next, it is determined whether or not both “RD sensor 1” and “RD sensor 2” have reached a predetermined temperature (step S3). The “RD sensor 1” is the first refrigerator temperature sensor 28, the “RD sensor 2” is the second refrigerator temperature sensor 29, and the “predetermined temperature” is the defrosting end temperature. It is. In this step S3, it is determined that both “RD sensor 1” and “RD sensor 2” have reached the “predetermined temperature” (YES: the temperature of the refrigerator for the refrigerator compartment has reached the defrosting end temperature at two locations). Then, the “R fan” (refrigeration room fan 21) is stopped (step S4). Thereby, the circulation of the air in the refrigerator compartment 5 and the specification switching chamber 6 and the vegetable compartment 7 at the time of the refrigerator specification while contacting the refrigerator 20 for the refrigerator compartment is stopped.

  Thereafter, the elapsed time is accumulated (step S5), and further, it is determined whether or not the accumulated time has reached the “predetermined time” (step S6). The “predetermined time” in step S6 is the accumulated arrival time until the start of defrosting of the freezer cooler 22. Here, if it is determined that the accumulated time has not reached the predetermined time (NO: the accumulated time until the start of defrosting of the freezer cooler 22 has not been reached), the “F cooling” may be terminated. Whether or not (step S7).

  The determination as to whether or not the “F cooling” can be ended is based on whether or not the temperature of the freezer compartment 8 detected by the freezing room temperature sensor 25 has dropped to the cooling end temperature or for a predetermined time (“R cooling” described later). It is determined whether or not 30 minutes has elapsed, and if NO is determined, it is next determined whether or not “R cooling required temperature” has been reached. (Step S8).

  “R” is a refrigerating room, and “R cooling required temperature” is a temperature required to cool the refrigerating room 5 whose temperature is detected by the refrigerating room temperature sensor 24. In step S8, the "required R room cooling temperature" is not reached (NO: the temperature of the refrigerating room 5 whose temperature is detected by the refrigerating room temperature sensor 24 increases to a temperature required to cool the refrigerating room 5). If not, the process returns to step S7.

  “F cooling” may be terminated in step S7 (YES: the temperature of the freezer cooler 22 detected by the freezer cooler temperature sensor 30 has dropped to the end of cooling, or a predetermined time has elapsed. Or the temperature of the refrigerating room 5 at which the temperature is detected by the refrigerating room temperature sensor 24 is requested to cool the refrigerating room 5. If it is determined that the temperature has increased to a certain temperature), “F cooling” is terminated (step S9). In this case, the end of the “F cooling” is to stop the freezer compartment fan 23.

  Next, “R cooling” is performed (step S10). “R cooling” is an operation of cooling the refrigerator compartment 5, the specification switching compartment 6 and the vegetable compartment 7 at the time of freezing, and specifically, the other outlet portion of the three-way valve 40 with the compressor 37 driven. 40c is opened (one outlet 40b is closed), and the refrigerator compartment fan 21 is driven.

  Accordingly, in the refrigeration cycle 38, the refrigerant compressed by the compressor 37 and condensed by the condenser 39 passes through the second capillary tube 43, is evaporated by the refrigerator 20 for refrigerating room, and returns to the compressor 37. Is repeated, thereby lowering the temperature of the refrigerator 20 for the refrigerator compartment. Further, at this time, the refrigerator compartment fan 21 circulates the air in the refrigerator compartment 5 and the specification switching chamber 6 and the vegetable compartment 7 at the time of the freezing specification in contact with the refrigerator 20 for the refrigerator compartment. The specification switching room 6 and the vegetable room 7 at the time of specification are cooled.

  Thereafter, it is determined whether or not “R cooling” can be ended (step S11). Whether or not the “R cooling” can be ended is determined based on whether or not the temperature of the refrigerating room 5 detected by the refrigerating room temperature sensor 24 has dropped to the cooling end temperature or whether a predetermined time has elapsed. If NO is determined, step S11 is repeated. If YES is determined, the process returns to step S1.

  In “R fan drive” in step S2 following the returned step S1, while “F cooling” is performed (while the compressor 37 is driven, one outlet 40b of the three-way valve 40 is closed, and the other The cooling of the refrigerator 20 for the refrigerating room is stopped by opening the outlet 40c of the refrigerating machine, that is, while the cooling of the refrigerating room 5 is stopped), the air in the refrigerating room 5, the specification switching room 6 and the vegetable room 7 at the time of refrigerating specification However, defrosting of the refrigerator 20 for refrigeration is performed by circulating while contacting the refrigerator 20 for refrigeration. At this time, the refrigerated room 5 and the specification switching room 6 and the vegetable room 7 at the time of the freezing specification are supplied with air with appropriate humidity by defrosting of the refrigerator 20 for the refrigerated room. It is moderately moisturized.

  Thereafter, by repeating the steps S1 to S11, the transition from the cooling operation of the freezer compartment 8 by the freezer cooler 22 to the cooling operation of the refrigerator compartment 5 by the refrigerating room cooler 20 is detected by the refrigerating room temperature sensor 24. While being performed based on the results, defrosting of the refrigerator 20 for the refrigerator compartment is performed by the operation of the fan 21 for the refrigerator compartment at the time of the cooling operation of the freezer compartment 8. The initial part of FIG. 1 (the left end part in the figure) represents such an operation.

  Now, during operation as described above, in step S3, both “RD sensor 1” and “RD sensor 2” have not reached “predetermined temperature” (NO: the temperature of the refrigerator for the refrigerator compartment is two or If it is determined that the defrosting end temperature has not been reached at one location (the portion surrounded by the two-dot chain line in FIG. 1), then the elapsed time is integrated as in step S5 (step S12). As in S6, it is determined whether or not the accumulated time has reached the “predetermined time” (the accumulated arrival time until the defrosting of the freezer cooler 22) (step S13).

Also in this step S13, if it is determined that the integrated time has not reached the predetermined time (NO), then whether or not the “R cooling required temperature” has been reached, or “F cooling” is set to the predetermined time (“R cooling”). It is determined whether or not it is time to move to “30 minutes, for example, 30 minutes” (step S14), and if NO is determined, the process returns to step S3. On the other hand, if “YES” is determined in the step S14, the “F cooling” is ended similarly to the step S9 (step S15).
Thereafter, the number of times that it is determined in step S3 that both “RD sensor 1” and “RD sensor 2” have not reached “predetermined temperature” (NO) is counted (step S16), and the process proceeds to step S10.

  If it is determined in step S6 or step S13 that the accumulated time has reached a predetermined time (YES), then precooling is performed as shown in FIG. 3 (step S17). In this precooling, the temperature of the freezer compartment 8 is set to a normal temperature so that the temperature of the freezer compartment 8 does not rise above the normal freezing temperature (for example, −22 [° C.]) in “F defrosting” (step S18) to be performed next. It is lower than the refrigeration temperature (for example, -24 [° C.]), and is performed by driving the compressor 37 at a higher speed than usual.

Thereafter, “F defrosting” is performed (step S18: hatched portion in FIG. 1), and “F defrosting” is to defrost the freezer cooler 22, which is the compressor. The operation is performed by operating (heating) the freezer cooler defrost heater 27 in a state where 37 is stopped.
Next, it is determined whether or not the number counted in step S16 has reached a predetermined number (step S19). If it is determined that the predetermined number has not been reached (NO), F EVA (freezer compartment cooler 22) is determined. ) Determines whether or not it has reached a temperature at which defrosting should be terminated (step S20).

If it is determined in step S20 that it is not (NO), step S20 is repeated, and if it is determined that it is (YES), F defrosting is terminated (freezer compartment cooler defrost heater 27 is stopped). (Step S21), the process proceeds to Step S1.
On the other hand, if it is determined in step S19 that the predetermined number of times has been reached (YES), the RD heater is operated (heat generation) (step S22). The RD heater is a refrigerating room cooler defrosting heater 26, and the defrosting of the refrigerating room cooler 20 is performed by operating the RD heater.

  Thereafter, as in step S20, it is determined whether or not the F-evaporator (freezer cooler 22) has reached a temperature at which defrosting should be terminated (step S23), and this step S23 is not (NO) ), Step S23 is repeated. If it is determined in step S23 (YES), the F defrosting is terminated (step S24) as in step S21, and then in this case, as shown in FIG. Cooling "is performed (step S25).

  Thereafter, “R fan drive” is performed as in step S2 (step S26). At this time, since the operation of the RD heater is not stopped, the defroster for the refrigerator in the refrigerator compartment is combined with the operation of the fan 21 in the refrigerator compartment. The heater 26 is activated. Thereby, more powerful defrosting of the cooler 20 for refrigerator compartment is performed (the right side from the shaded part of FIG. 1).

  Next, as in step S3, it is determined whether both “RD sensor 1” and “RD sensor 2” have reached a predetermined temperature (step S27). If it is determined in step S27 that both “RD sensor 1” and “RD sensor 2” have not reached “predetermined temperature” (NO), then the elapsed time is accumulated as in step S5 ( Further, as in step S6, it is determined whether or not the accumulated time has reached the “predetermined time” (the accumulated arrival time until the freezing room cooler 22 starts defrosting) (step S29).

  If it is determined in step S29 that the accumulated time has not reached the predetermined time (NO), the process returns to step S27, and in the returned step S27, both “RD sensor 1” and “RD sensor 2” have reached the predetermined temperature. If it is determined (YES), the operation of the RD heater (cooler defrost heater 26) is stopped (step S30).

  Then, “R cooling” is performed in the same manner as in step S10 (step S31), and thereafter, it is determined whether or not “R cooling” may be completed in the same manner as in step S11 (step S32), and should not be completed. If it is determined (NO), step S32 is repeated, and if it is determined that the process can be terminated (YES), the process returns to step S25. That is, after the previous F defrosting (step S18), for the freezer compartment accompanied by the defrosting of the refrigerator 20 for the refrigerator compartment by the operation of the fan 21 for the refrigerator compartment and the operation of the refrigerator defrost heater 26 for the refrigerator compartment. The transition from the cooling operation of the freezer compartment 8 by the cooler 22 to the cooling operation of the refrigerator compartment 5 by the refrigerator for the refrigerator compartment 20 is the first refrigerator temperature sensor 28 for the refrigerator compartment (RD sensor 1) and the second one. This is performed based on the detection result of the refrigerator temperature sensor 29 (RD sensor 2).

  On the other hand, if it is determined in step S29 that the accumulated time has reached the predetermined time (YES), the process proceeds to step S17. Then, in step S19 after the advance, in this case, it is determined that the predetermined number of times has not been reached (NO), so the process proceeds to step S1 through steps S20 and S21, that is, returns to the original operation state.

  As described above, in this configuration, the transition from the cooling operation of the freezer compartment 8 by the freezer cooler 22 to the cooling operation of the refrigerator compartment 5 by the refrigerator refrigerator 20 is based on the detection result of the refrigerator room temperature sensor 24. (Steps S8 to S10), and during the cooling operation of the freezer compartment 8, the refrigerator 21 for the refrigerator compartment is defrosted by the operation of the fan 21 for the refrigerator compartment (Step S2). When the defrosting is performed, it is predetermined that both or one of the two cold room temperature sensors 28 and 29 for detecting the temperature of the cold room cooler 20 does not reach a predetermined temperature. On the condition that there have been a number of times (YES in step S19), the refrigerator defrost heater 26 for refrigeration room is operated when defrosting the freezer cooler 22 (step S22).

  Thereby, the cooling operation of the refrigerator compartment 5 by the refrigerator 20 for the refrigerator compartment (end of the defrosting of the refrigerator refrigerator 20) is performed based on the temperature detected by the refrigerator room temperature sensor. Since the defrosting of 20 is performed by the operation of the refrigerating room fan 21, the temperature of the refrigerating room 5 is limited to a temperature (refrigerating room cooling required temperature) at which the rise should be transferred to the cooling operation of the refrigerating room 5. Can solve the problem of overheating.

  In that case, the temperature of the refrigerator 20 for the refrigerator compartment may not rise to a predetermined temperature (defrosting end temperature), and the two refrigerator compartments for detecting the temperature of the refrigerator 20 for the refrigerator compartment may be detected. The detected temperature of both or one of the cooler temperature sensors 28 and 29 may not reach a predetermined temperature, but if it is a predetermined number of times (YES in step S19), defrosting of the freezer cooler 22 is performed. Since the refrigerator defrost heater 26 for refrigeration rooms is operated when performing, defrosting of the refrigerator 20 for refrigeration rooms is performed reliably. Moreover, in this case, since the refrigerator temperature sensors 28 and 29 detect the temperatures of the two locations of the refrigerator compartment 20, the defrosting of the refrigerator compartment 20 is more reliably performed without any remaining defrost. Can be done.

  Further, in this configuration, when the defrosting of the refrigerating room cooler 20 is performed as described above, the detected temperature of both or one of the two refrigerating room cooler temperature sensors 28 and 29 reaches a predetermined temperature. On condition that there is no predetermined number of times (YES in step S19), the refrigerator defrost heater 26 for the refrigerator compartment is operated when the fan 21 for the refrigerator compartment (step S26) (step S22). .

  Thereby, while solving the problem of the overheating of the refrigerator compartment 5, the refrigerator 20 for refrigerator compartment by both actions by operating the refrigerator defrost heater 26 for refrigerator compartment at the time of the operation of the fan 21 for refrigerator compartment. The defrosting can be performed more reliably. Of course, also in this case, since the refrigerator temperature sensors 28 and 29 detect the temperatures of the two locations of the refrigerator compartment 20, defrosting of the refrigerator compartment 20 can be performed without remaining defrost. It can be done reliably.

  Further, in the present configuration, similarly, when the defrosting of the refrigerator for cooler 20 is performed as described above, the detected temperature of both or one of the two refrigerator cooler temperature sensors 28 and 29 is a predetermined temperature. If the defrosting of the freezer cooler 22 immediately after the defrosting is performed (step S18 after YES in step S13) on the condition that the predetermined number of times has not been reached (YES in step S19), the next freezer The refrigeration room cooler defrost heater 26 is operated when the refrigeration room fan 21 is operated (step S22) until the refrigeration room 22 is defrosted (step S18 after YES in step S29). .

  Thereby, while solving the problem of the overheating of the refrigerator compartment 5, the refrigerator 20 for refrigerator compartment by both actions by operating the refrigerator defrost heater 26 for refrigerator compartment at the time of the operation of the fan 21 for refrigerator compartment. The defrosting can be performed more reliably. Of course, also in this case, since the refrigerator temperature sensors 28 and 29 detect the temperatures of the two locations of the refrigerator compartment 20, defrosting of the refrigerator compartment 20 can be performed without remaining defrost. It can be done reliably.

  Further, particularly in this case, the operation of the refrigerator defrost heater 26 is performed immediately after the occurrence of the detection temperature of both or one of the two refrigerator temperature sensors 28 and 29 not reaching the predetermined temperature. By performing the defrosting of the freezer cooler 22 until the next defrosting of the freezer cooler 22, the refrigerating room cooler removal combined with the operation of the refrigerator freezer 21 is performed. The defrosting of the refrigerating room cooler 20 by the operation of the frost heater 26 can be performed in a limited manner so that the cooling of the refrigerating room 5 does not become unclear.

  As described above, when the defrosting of the refrigerator 20 is performed, it is a predetermined number of times that the detected temperature of both or one of the two refrigerator temperature sensors 28 and 29 does not reach the predetermined temperature. Instead of making it a condition, there is a condition that the detected temperature difference (temperature difference D shown in FIG. 1) of the two refrigerator temperature sensors 28 and 29 is equal to or greater than a predetermined value. Anyway. Even if it does in this way, since it can detect that the defrosting of the refrigerator 20 for refrigerator compartments has not been made reliably by the difference in detection temperature of the two refrigerator temperature sensors 28 and 29, it is based on it. The same effect as described above can be obtained by the same operation as described above.

  8 to 10 show a second embodiment (second embodiment) of the present invention, and the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. Only the different parts will be described.

  In this case, the refrigeration room cooler 20 is normally defrosted by blowing air from the lower side to the upper side of the cold room cooler 20 by the cold room fan 21 as shown by arrows in FIG. On the other hand, as shown in FIG. 9, when it is determined in step S3 or S27 that both “RD sensor 1” and “RD sensor 2” have not reached “predetermined temperature” (NO), It is determined whether “RD sensor 1” has not reached a predetermined temperature (step S101).

  If NO is determined in step S101, the process proceeds to step S12 or S28. If YES is determined, the refrigerating room fan 21 is reversed to reverse the direction of air flow by the refrigerating room fan 21. (Step S102). That is, as shown by the arrows in FIG. 10, on the contrary, the refrigeration room cooler 20 is defrosted by blowing air from the upper side to the lower side of the cold room cooler 20. Then, the process proceeds to step S12 or S28.

  In this case, normally, the refrigeration room 5 is cooled by defrosting the refrigeration room cooler 20 by blowing air from the lower side to the upper side of the refrigeration room cooler 20 by the cold room fan 21. The air whose temperature has been raised is brought into contact with the refrigerator 20 for the refrigerator compartment from the lower part to the upper part, so that the defrosting of the refrigerator 20 for the refrigerator compartment can be performed from the lower part to the upper part. In this case, if frost remains in the upper part of the refrigerator 20 for the refrigerator compartment, the temperature detected by the upper refrigerator temperature sensor 28 for the refrigerator compartment does not reach a predetermined temperature. By reversing the direction of the air blown by the fan 21, the refrigerated room cooler 20 is brought into contact with the refrigerated room cooler 20 from the upper part to the lower part to cool the refrigerating room 5 to defrost the refrigerated room cooler 20. As a result, the defrosting of the refrigerator 20 for the refrigerator compartment can be performed reliably.

  In addition, in this case, since the defrosting of the refrigerator 20 for the refrigerator compartment can be surely performed by reversing the blowing direction, the cooling operation of the refrigerator compartment 5 by the refrigerator for the refrigerator compartment 20 (end of the defrosting of the refrigerator 20 for the refrigerator compartment) ) Can be performed based on the detection temperature of the refrigeration room temperature sensor 24 without depending on the detection results of the refrigeration room cooler temperature sensors 28 and 29, thereby increasing the temperature of the refrigeration room 5. Thus, the temperature can be kept up to the temperature to be shifted to the cooling operation (required cooling temperature of the refrigerator compartment 5), and the problem of excessive temperature rise in the refrigerator compartment 5 can be solved.

  The present invention is not limited to the embodiments described above and shown in the drawings. In particular, the presence / absence of the specification switching room and the vegetable room is appropriately changed within the scope of the gist. Can do.

Time chart showing the first embodiment of the present invention Flowchart for explaining the action 1 Flowchart for explaining the action 2 Flowchart for explaining the action 3 Vertical side view of the entire refrigerator Schematic diagram of refrigeration cycle Electrical configuration block diagram FIG. 5 partial equivalent diagram showing a second embodiment of the present invention Partial flowchart for explaining the operation FIG. 5 equivalent view in a different state from FIG. 1 equivalent diagram showing a conventional example 1 equivalent diagram showing a different conventional example

Explanation of symbols

  In the drawing, 5 is a refrigerator compartment, 8 is a refrigerator compartment, 20 is a refrigerator refrigerator, 21 is a refrigerator fan, 22 is a refrigerator refrigerator, 24 is a room temperature sensor, and 26 is a refrigerator compartment refrigerator. A frost heater, 28 is a first refrigerator temperature sensor, 29 is a second refrigerator temperature sensor, and 44 is a control device (control means).

Claims (5)

In addition to having a freezer room and a refrigerator room,
A freezer cooler for cooling the freezer;
A refrigerating room cooler for cooling the refrigerating room;
A refrigerating room fan for circulating air in the refrigerating room in contact with the refrigerating room cooler;
A refrigerating room cooler defrost heater for heating the refrigerating room cooler;
A refrigerating room temperature sensor for detecting the temperature of the refrigerating room;
Two refrigerator temperature sensors for detecting the temperature of two locations of the refrigerator for the refrigerator compartment,
The transition from the freezer cooling operation by the freezer cooler to the refrigerating room cooling operation by the refrigerating room cooler is performed based on the detection result of the refrigerating room temperature sensor, and the freezing room cooling operation thereof Sometimes defrosting the cold room cooler by operating the cold room fan,
The refrigeration is performed on the condition that when the defrosting of the refrigerator for the refrigerator compartment is performed, the detected temperature of both or one of the two refrigerator compartment temperature sensors does not reach the predetermined temperature for a predetermined number of times. The refrigerator characterized by operating the said refrigerator cooler defrost heater when performing defrosting of the cooler for rooms. In addition to having a freezer room and a refrigerator room,
A freezer cooler for cooling the freezer;
A refrigerating room cooler for cooling the refrigerating room;
A refrigerating room fan for circulating air in the refrigerating room in contact with the refrigerating room cooler;
A refrigerating room cooler defrost heater for heating the refrigerating room cooler;
A refrigerating room temperature sensor for detecting the temperature of the refrigerating room;
Two refrigerator temperature sensors for detecting the temperature of two locations of the refrigerator for the refrigerator compartment,
A transition from a freezer cooling operation by the freezer cooler to a refrigerating room cooling operation by the refrigerating room cooler is performed based on the detection result of the refrigerating room temperature sensor, and the freezing room cooling operation thereof Sometimes defrosting the cold room cooler by operating the cold room fan,
The refrigeration is performed on the condition that when the defroster of the refrigerator for the refrigerator compartment is defrosted, the detected temperature of both or one of the two refrigerator compartment temperature sensors does not reach the predetermined temperature for a predetermined number of times. A refrigerator characterized in that the refrigerator defrost heater for the refrigerator compartment is operated when the room fan is operated. In addition to having a freezer room and a refrigerator room,
A freezer cooler for cooling the freezer;
A refrigerating room cooler for cooling the refrigerating room;
A refrigerating room fan for circulating air in the refrigerating room in contact with the refrigerating room cooler;
A refrigerator defrost heater for the refrigerator compartment for heating the refrigerator for the refrigerator compartment;
A refrigerating room temperature sensor for detecting the temperature of the refrigerating room;
Two refrigerator temperature sensors for detecting the temperature of two locations of the refrigerator for the refrigerator compartment,
A transition from the cooling operation of the freezer compartment by the freezer cooler to the cooling operation of the refrigerating room by the refrigerating room cooler is performed based on the detection result of the refrigerating room temperature sensor, and the freezing room cooling operation thereof Sometimes defrosting the cold room cooler by operating the cold room fan,
When the defrosting of the refrigerator for the refrigeration room was performed, on the condition that the detected temperature of both or one of the two refrigeration room cooler temperature sensors did not reach the predetermined temperature for a predetermined number of times. The refrigeration room cooler defrosting heater is operated when the refrigeration room fan is operated from the time when the freezer room defroster is defrosted until the next time when the freezer room cooler is defrosted. A refrigerator characterized by that.   When the defrosting of the refrigerator for the refrigeration room is performed, in place of the condition that the detected temperature of both or one of the two refrigeration room cooler temperature sensors does not reach the predetermined temperature. The refrigerator according to any one of claims 1 to 3, characterized in that a difference between detected temperatures of the two refrigerator temperature sensors for the refrigerator compartment is equal to or greater than a predetermined value. In addition to having a refrigerator compartment,
A refrigerating room cooler for cooling the refrigerating room;
A refrigerating room fan for circulating air in the refrigerating room in contact with the refrigerating room cooler;
Two cold room temperature sensors for detecting the temperature at two locations above and below the cold room cooler,
The defrosting of the refrigerator for the refrigerator compartment is performed by blowing air from below to the refrigerator for the refrigerator compartment with the fan for the refrigerator compartment,
When the defrosting of the refrigerator for the refrigerator compartment is performed, if the detected temperature of the refrigerator temperature sensor for the upper refrigerator compartment of the two refrigerator compartment temperature sensors does not reach a predetermined temperature, A refrigerator characterized in that the direction of air blown by a refrigerator fan is reversed.

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