CN117795272A - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
- Publication number
- CN117795272A CN117795272A CN202280053230.7A CN202280053230A CN117795272A CN 117795272 A CN117795272 A CN 117795272A CN 202280053230 A CN202280053230 A CN 202280053230A CN 117795272 A CN117795272 A CN 117795272A
- Authority
- CN
- China
- Prior art keywords
- temperature
- chamber
- refrigerating chamber
- small
- lower limit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 13
- 238000001816 cooling Methods 0.000 claims abstract description 73
- 238000010257 thawing Methods 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000007710 freezing Methods 0.000 claims description 75
- 230000008014 freezing Effects 0.000 claims description 72
- 238000007664 blowing Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims 1
- 235000013305 food Nutrition 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 235000013372 meat Nutrition 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Defrosting Systems (AREA)
Abstract
A refrigerator (10) comprising: a refrigerating chamber (12); a small refrigerating chamber (20) partitioned inside the refrigerating chamber (12); a small refrigerating chamber temperature sensor (22) for measuring the indoor temperature of the small refrigerating chamber (20); a cooling chamber (115) that cools air blown to the small refrigerating chamber (12) by a cooler (116); a heating section (117) configured to defrost the cooler (116) by heating; a blower (25) that blows air from the cooling compartment (115) to the refrigerating compartment (12); and a calculation control unit (26). Further, the calculation control section (26) performs a cooling cycle in which the cooler (116) and the blower (25) are operated such that the indoor temperature of the small refrigerating chamber (20) measured by the small refrigerating chamber temperature sensor (22) reaches a first upper limit temperature or lower and a first lower limit temperature or higher, and the calculation control section (26) reduces the first lower limit temperature in the cooling cycle at the time of the defrosting operation to be performed. The refrigerator (10) can realize accurate control of the temperature of the small refrigerating chamber (20).
Description
The present invention relates to a refrigerator, and more particularly, to a refrigerator having a small refrigerating chamber inside a refrigerating chamber.
Conventionally, as described in patent document 1, a refrigerator in which a storage container is disposed in a refrigerator compartment is known. Wherein, a soft freeze (refrigerating) container is accommodated at the lowest part of the refrigerating chamber. The air blown by the blower is supplied to the refrigerating chamber through an air blowing path formed at the rear side of the refrigerating chamber. On the other hand, part of the air blown through the air blowing path is blown to the soft freeze container without passing through the refrigerating chamber, and cold air is directly supplied to the meat or other storage. The temperature in the soft refrigerating container is thereby lower than the temperature in the refrigerating chamber, for example, about 0 ℃. Thus, foods such as meat contained in the soft freeze container can be preserved.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2018-44687
Disclosure of Invention
Problems to be solved by the invention
However, in the refrigerator described in the above patent document 1, there is room for improvement in terms of the low temperature and the constant temperature of the small refrigerating chamber.
The problems will be described in detail with reference to the graph of fig. 5. In the graph, the horizontal axis represents elapsed time, and the vertical axis represents indoor temperature. Further, the indoor temperature of the refrigerating chamber is shown in solid lines, the indoor temperature of the soft freezing chamber is shown in broken lines, and the indoor temperature of the freezing chamber is shown in chain lines. Referring to the graph, the indoor temperatures of all the storage compartments rise during the defrost stroke. The reason is that, in the defrosting stroke, the interior of the storage compartment is warmed up by the defrosting heater without cooling by the evaporator. In this case, when the indoor temperature of the soft-freezing chamber rises to 0 ℃ or higher, meat and fish contained in the soft-freezing chamber are temporarily melted, and thus a problem of a decrease in freshness occurs.
The present invention has been made in view of the foregoing circumstances, and an object thereof is to provide a refrigerator capable of effectively achieving low temperature and constant temperature of a small refrigerating chamber.
Means for solving the problems
The refrigerator of the present invention includes: a refrigerating chamber; a small refrigerating chamber partitioned inside the refrigerating chamber; a small refrigerating chamber temperature sensor for measuring an indoor temperature of the small refrigerating chamber; a cooling chamber that cools air blown to the small refrigerating chamber by a cooler; a heating unit that defrost the cooler by heating; a blower blowing the air from the cooling compartment to the refrigerating compartment; a calculation control unit; the calculation control unit performs a cooling cycle in which the cooler and the blower are operated such that the indoor temperature of the small refrigerating compartment measured by the small refrigerating compartment temperature sensor becomes equal to or lower than a first upper limit temperature and equal to or higher than a first lower limit temperature, and the calculation control unit decreases a set value of the first lower limit temperature in the cooling cycle in which defrosting operation is to be performed.
In addition, in the refrigerator of the present invention, it further comprises: a freezing chamber; and a freezing chamber temperature sensor for measuring an indoor temperature of the freezing chamber; the calculation control portion cools the freezing chamber such that an indoor temperature of the freezing chamber measured with the freezing chamber temperature sensor reaches a second upper limit temperature or lower and a second lower limit temperature or higher, and in the cooling cycle at the time of the defrosting operation to be performed, the calculation control portion performs the defrosting operation in a case where an indoor temperature of the freezing chamber measured with the freezing chamber temperature sensor is the second lower limit temperature or lower and an indoor temperature of the small refrigerating chamber measured with the small refrigerating chamber temperature sensor is the first lower limit temperature or lower.
In addition, in the refrigerator of the present invention, it further comprises a damper provided in a ventilation path connecting the cooling chamber and the small refrigerating chamber, and the calculation control section operates the blower with the damper in an opened state before the defrosting operation is performed.
Further, in the refrigerator of the present invention, it is configured such that a mode of preferentially cooling the small refrigerating chamber is selectable, and in a case where the mode of preferentially cooling the small refrigerating chamber is selected, the calculation control portion lowers the set value of the first lower limit temperature in the cooling cycle at the time of immediately performing the defrosting operation.
Effects of the invention
The refrigerator of the present invention includes: a refrigerating chamber; a small refrigerating chamber partitioned inside the refrigerating chamber; a small refrigerating chamber temperature sensor for measuring an indoor temperature of the small refrigerating chamber; a cooling chamber in which air blown to the small refrigerating chamber is cooled by a cooler; a heating unit that defrost the cooler by heating; a blower blowing the air from the cooling compartment to the refrigerating compartment; a calculation control unit; the calculation control unit performs a cooling cycle in which the cooler and the blower are operated such that the indoor temperature of the small refrigerating compartment measured by the small refrigerating compartment temperature sensor becomes equal to or lower than a first upper limit temperature and equal to or higher than a first lower limit temperature, and the calculation control unit decreases a set value of the first lower limit temperature in the cooling cycle in which defrosting operation is to be performed. According to the refrigerator of the invention, the low temperature and the constant temperature of the small refrigerating chamber can be effectively achieved. Specifically, since the lower limit temperature is reduced in the cooling cycle when the defrosting operation is to be performed, the indoor temperature of the small refrigerating chamber can be reduced when the defrosting operation is to be performed. Thus, even if the temperature of the refrigerating chamber rises due to the defrosting operation, the excessive rise in the indoor temperature of the small refrigerating chamber can be suppressed, and the freshness of the food stored in the small refrigerating chamber can be maintained.
In addition, in the refrigerator of the present invention, it further comprises: a freezing chamber; and a freezing chamber temperature sensor for measuring an indoor temperature of the freezing chamber; the calculation control portion cools the freezing chamber such that an indoor temperature of the freezing chamber measured with the freezing chamber temperature sensor reaches a second upper limit temperature or lower and a second lower limit temperature or higher, and in the cooling cycle at the time of the defrosting operation to be performed, the calculation control portion performs the defrosting operation in a case where an indoor temperature of the freezing chamber measured with the freezing chamber temperature sensor is the second lower limit temperature or lower and an indoor temperature of the small refrigerating chamber measured with the small refrigerating chamber temperature sensor is the first lower limit temperature or lower. According to the refrigerator of the present invention, since the defrosting operation is started when the freezing compartment is the second lower limit temperature or less and both of the small refrigerating compartments are the first lower limit temperature or less, the indoor temperature of the small refrigerating compartment can be suppressed from rising above a certain temperature.
In addition, in the refrigerator of the present invention, it further comprises a damper provided in a ventilation path connecting the cooling chamber and the small refrigerating chamber, and the calculation control section operates the blower with the damper in an opened state before the defrosting operation is performed. According to the refrigerator of the present invention, since the blower is operated in the state that the damper is opened before the defrosting operation is performed, the small refrigerating chamber is further cooled, and thus an increase in the indoor temperature of the small refrigerating chamber can be suppressed in the defrosting operation.
Further, in the refrigerator of the present invention, it is configured such that a mode of preferentially cooling the small refrigerating chamber is selectable, and in a case where the mode of preferentially cooling the small refrigerating chamber is selected, the calculation control portion lowers the set value of the first lower limit temperature in the cooling cycle at the time of immediately performing the defrosting operation. According to the refrigerator of the present invention, when the user selects the mode of preferentially cooling the small refrigerating chamber, the lower limit temperature is reduced in the cooling cycle at the time of the defrosting operation, thereby the small refrigerating chamber can be cooled appropriately according to the user's requirement, and the energy required for cooling can be reduced.
Fig. 1 is a side cross-sectional view illustrating an internal structure of a refrigerator according to an embodiment of the present invention.
Fig. 2 is a block diagram illustrating a connection structure of a refrigerator according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating a cooling method of a refrigerator according to an embodiment of the present invention.
Fig. 4 is a graph illustrating a temperature change of a refrigerator according to an embodiment of the present invention.
Fig. 5 is a graph showing a temperature change of a refrigerator related to the background art.
A refrigerator 10 according to an embodiment of the present invention will be described in detail based on the drawings. In the description of the present embodiment, the same reference numerals are used for the same components in principle, and duplicate descriptions are omitted.
Fig. 1 is a side sectional view of a refrigerator 10.
The heat insulating box 11 constituting the main body of the refrigerator 10 is constituted by: an outer case 111 formed of a steel plate bent to a predetermined shape; an inner case 112 formed of a synthetic resin plate disposed on an inner side spaced apart from the outer case 111; and a heat insulating material 113 filled between the outer case 111 and the inner case 112.
The storage compartment inside the heat-insulating box 11 is partitioned into a refrigerating compartment 12 and a freezing compartment 13 from the top down. The refrigerating chamber 12 and the freezing chamber 13 are partitioned by a heat insulating wall 17. The front surface opening of the refrigerator compartment 12 is closed by a heat-insulating door 18, and the front surface opening of the freezer compartment 13 is closed by a heat-insulating door 19.
Below the interior of the fresh food compartment 12 is a fresh food compartment 20 that is separated from other areas of the fresh food compartment 12. The small refrigerating compartment 20 is lower in temperature than other regions of the refrigerating compartment 12, for example, it is a soft freezing compartment whose inside is cooled to around-3 ℃. The small refrigerating chamber 20 is formed inside a receiving container 21 made of synthetic resin, which is opened at an upper surface. The storage container 21 is disposed so as to be able to be pulled out forward. Inside the small refrigerating chamber 20, an object 23 to be stored such as meat or fish is stored in a semi-frozen state.
A cooling chamber 115 is formed at the rear side of the freezing chamber 13. An evaporator 116 as a cooler is disposed in the cooling chamber 115. A machine chamber 14 is partitioned and formed rearward of the lower end side of the refrigerator 10, and a compressor 15 is disposed in the machine chamber 14. The evaporator 116 and the compressor 15 together with a condenser and an expansion device not shown here form a vapor compression refrigeration cycle. In the vapor compression refrigeration cycle operation, the air inside the cooling chamber 115 is cooled by the evaporator 116 and blown to each storage chamber, so that the indoor temperature of each storage chamber reaches a specified cooling temperature range.
The blower 25 is disposed inside the cooling chamber 115 above the evaporator 116. The blower 25 is an axial blower or a centrifugal blower, and blows air cooled by the evaporator 116 to the refrigerating compartment 12 and the freezing compartment 13.
The heating unit 117 is disposed below the evaporator 116 inside the evaporator 116. The heating unit 117 is, for example, a heater that generates heat when energized.
A blast duct 118 is formed upward from the cooling chamber 115. An air outlet 16 for blowing air out to an opening of the refrigerating compartment 12 is formed at an upper portion of the air supply path 118. In addition, a part of the air cooled by the evaporator 116 is also blown to the freezing chamber 13. Further, a part of the air cooled by the evaporator 116 is also sent into the small refrigerating compartment 20 via the air-sending passage 118 and the air outlet 30.
The damper 28 is an opening and closing device installed in the air supply path 118. With the damper 28 in an open state, air can be blown from the cooling compartment 115 to the refrigerator compartment 12 and the small refrigerator compartment 20. On the other hand, when the damper 28 is in the closed state, the air supply passage 118 is closed. In addition, the damper 28 is a multi-way damper, and the damper 28 can individually open and close the air supply path 118 connected to the refrigerating compartment 12 and the air supply path 118 connected to the small refrigerating compartment 20.
The small refrigerator compartment temperature sensor 22 is a sensor for measuring the indoor temperature of the small refrigerator compartment 20. The freezing chamber temperature sensor 27 is a sensor for measuring the indoor temperature of the freezing chamber 13. The defrost sensor 29 is a temperature sensor disposed inside the cooling chamber 115 and near the evaporator 116. As described later, the defrost sensor 29 is used to defrost the evaporator 116 during a defrost stroke.
Fig. 2 shows a block diagram of a connection structure of the refrigerator 10.
The calculation control section 26 is composed of a CPU, a RAM, a ROM, and the like, performs a specified calculation process based on information input from an input side terminal, and outputs an output signal generated by the calculation process from an output side terminal. The input side terminal of the calculation control portion 26 is connected to the small refrigerating chamber temperature sensor 22, the freezing chamber temperature sensor 27, the timer 24, and the defrost sensor 29. The output side terminal of the calculation control section 26 is connected to the compressor 15, the blower 25, and the heating section 117. Lower part(s)
The small refrigerator temperature sensor 22 measures the indoor temperature of the small refrigerator 20, and inputs information indicating the temperature to the calculation control unit 26.
The freezing chamber temperature sensor 27 measures the indoor temperature of the freezing chamber 13, and inputs information indicating the temperature to the calculation control unit 26.
The timer 24 measures time or time, and inputs information indicating the time or time to the calculation control unit 26.
The defrosting sensor 29, which will be described later, measures the internal temperature of the cooling chamber 115 in the defrosting stroke, and inputs information indicating the temperature to the calculation control section 26.
The compressor 15 compresses the refrigerant used in the refrigeration cycle based on the information output from the calculation control unit 26.
The blower 25 blows air of the cooling compartment 115 to the refrigerating compartment 12 and the freezing compartment 13 based on information output from the calculation control section 26.
The heating unit 117 generates heat based on the information output from the calculation control unit 26, thereby increasing the temperature of the interior of the cooling chamber 115 and defrosting the frost adhering to the evaporator 116.
Next, basic operations of the refrigerator 10 having the aforementioned structure will be described.
When the cooling operation is performed, the calculation control unit 26 operates the compressor 15 to cool the air in the cooling chamber 115 by the evaporator 116. Further, the calculation control portion 26 blows air inside the cooling chamber 115 by operating the blower 25. The blown air is blown to the refrigerator compartment 12 via the air supply path 118 and the air supply port 16, thereby cooling the inside of the refrigerator compartment 12. In addition, a part of the blown air is blown into the inside of the small refrigerating chamber 20, thereby also cooling the inside of the small refrigerating chamber 20. Further, a part of the blown air is blown to the freezing chamber 13, thereby also cooling the inside of the freezing chamber 13 to a specified freezing temperature range. The air cooled in each storage compartment is returned to the cooling compartment 115 through a return air passage not shown here.
The cooling operation is performed so that the indoor temperature of the freezing chamber 13 reaches a specified temperature range. Specifically, when the indoor temperature of the freezing chamber 13 detected by the freezing chamber temperature sensor 27 reaches the upper limit temperature (second upper limit temperature) or more, the calculation control section 26 operates the compressor 15 and the blower 25 to cool the indoor of the freezing chamber 13. After that, when the indoor temperature of the freezing chamber 13 detected by the freezing chamber temperature sensor 27 becomes equal to or lower than the lower limit temperature (second lower limit temperature), the calculation control unit 26 stops the compressor 15 and the blower 25, and stops cooling the freezing chamber 13. For example, the upper limit temperature of the freezing chamber 13 is-18℃and the lower limit temperature is-22 ℃. Here, the upper limit temperature is referred to as an ON point ("ON") and the lower limit temperature is also referred to as a break point ("OFF").
The strokes from the start and stop of the operation of the compressor 15 and the blower 25 to the start of the next operation are referred to as one refrigeration cycle.
The temperature of the small refrigerating compartment 20 is also controlled so that the indoor temperature thereof reaches a designated temperature range. Specifically, when the indoor temperature of the small refrigerating chamber 20 detected by the small refrigerating chamber temperature sensor 22 reaches the upper limit temperature (first upper limit temperature) or more, the calculation control section 26 introduces air from the cooling chamber 115 into the inside of the small refrigerating chamber 20. When the indoor temperature of the small refrigerator compartment 20 becomes equal to or lower than the lower limit temperature (first lower limit temperature), the calculation control unit 26 stops cooling the small refrigerator compartment 20. For example, the upper limit temperature of the small refrigerating chamber 20 is-2 ℃, and the lower limit temperature is-4 ℃.
Further, the calculation control unit 26 similarly controls the temperature of the refrigerating chamber 12 so that the indoor temperature thereof reaches a predetermined temperature range, for example, +2 ℃ or higher and +5 ℃ or lower.
The defrosting operation is an operation for melting frost adhering to the surface of the evaporator 116. Specifically, with the operation of the vapor compression refrigeration cycle, thick frost is generated on the surface of the evaporator 116, and if the cooling operation is continued in this state, the frost hinders heat transfer and air blowing. For this reason, in the defrosting operation, the calculation control unit 26 stops the operation of the compressor 15 and the blower 25, closes the damper 28, and energizes the heating unit 117 to heat, thereby performing the defrosting operation to melt and remove frost.
The method will be described with reference to the flowchart of fig. 3, in which the defrosting operation is performed while suppressing an increase in the indoor temperature inside the small refrigerating chamber 20 when the user selects the "fresh soft freeze mode".
In step S10, the calculation control unit 26 is executing a normal cooling operation. That is, as described above, the calculation control section 26 operates the compressor 15 and the blower 25 so that the indoor temperature of the freezing chamber 13 detected by the freezing chamber temperature sensor 27 reaches the temperature range defined by the upper limit temperature and the lower limit temperature.
In step S11, the user operates an operation panel, not shown here, and the calculation control unit 26 executes the fresh soft freeze mode. In the fresh soft freeze mode, the indoor temperature of the small refrigerator compartment 20 is reduced to be lower than a normal cooling cycle before a defrosting stroke as described later is performed. This can prevent the indoor temperature of the small refrigerator compartment 20 from reaching 0 ℃ or higher in the defrosting stroke, and can maintain the freshness of the stored object 23 stored in the small refrigerator compartment 20 satisfactorily.
In step S12, the calculation control portion 26 lowers the lower limit temperature of the small refrigerating chamber temperature sensor 22 of the small refrigerating chamber 20 by, for example, a range of 2 ℃ to 3 ℃ and cools the entire small refrigerating chamber 20, compared to the normal operation.
Here, the normal operation refers to an operation in which a fresh soft freeze mode or the like is not selected. In the normal operation, the calculation control unit 26 cools the indoor temperature of the small storage room 20 to, for example, about 0 degrees in order to reduce the energy consumption and save the electric charge. On the other hand, in the fresh soft freeze mode, the calculation control unit 26 reduces the lower limit temperature to about-3 ℃.
In step S13, the calculation control unit 26 enters the defrosting control in the fresh soft freeze mode after the operation integration time of the compressor 15 reaches a predetermined time.
In step S14, the calculation control unit 26 confirms whether or not the operation integrated time of the compressor 15 reaches the specified time by using the timer 24. Here, the designated time refers to a time when defrosting is required in the evaporator 116, for example, 88 hours.
In the case of yes in step S14, that is, in the case where the operation integrated time of the compressor 15 reaches the specified time, the calculation control unit 26 proceeds to step S15.
In the case of no in step S14, that is, in the case where the operation integrated time of the compressor 15 has not reached the specified time, the calculation control unit 26 returns to step S13.
In step S15, the calculation control unit 26 determines whether or not the indoor temperature of the freezing chamber 13 measured by the freezing chamber temperature sensor 27 has reached or not the freezing chamber lower limit temperature (second lower limit temperature). The lower limit temperature of the freezing chamber is, for example, -22 ℃.
In the case of yes in step S15, that is, in the case where the indoor temperature of the freezing chamber 13 reaches the freezing chamber lower limit temperature or lower, the calculation control section 26 proceeds to step S16.
In the case of no in step S15, that is, in the case where the indoor temperature of the freezing chamber 13 does not reach the freezing chamber lower limit temperature or lower, the calculation control unit 26 returns to step S13.
In step S16, the calculation control unit 26 further cools the interior of the small storage compartment 20 in the cooling cycle at the time of the defrosting operation. Specifically, the calculation control portion 26 determines whether or not the indoor temperature of the small refrigerating chamber 20 measured by the freezing chamber temperature sensor 27 reaches the small storage chamber lower limit temperature (first lower limit temperature) or less. The lower limit temperature of the small storage compartment is, for example, -4 ℃, which is a temperature lower than the lower limit temperature of the small storage compartment in the normal fresh-keeping soft-freezing mode.
In the case of yes in step S16, that is, in the case where the indoor temperature of the small refrigerating chamber 20 has reached or fallen below the small storage chamber lower limit temperature, the calculation control unit 26 proceeds to step S17 because the small refrigerating chamber 20 is sufficiently cooled.
In the case of no in step S16, that is, in the case where the indoor temperature of the small refrigerator compartment 20 does not reach or fall below the small storage compartment lower limit temperature, the calculation control unit 26 returns to step S13.
In step S17, the calculation control unit 26 stops the compressor 15 to stop the cooling of the cooling chamber 115 by the evaporator 116.
In step S18, after stopping the compressor 15, the calculation control unit 26 operates the blower 25 for a predetermined time while the damper 28 is in a state of blowing air only into the small refrigerating compartment 20. By so doing, it is possible to supply only cold air into the interior of the small refrigerating chamber 20 before the defrosting stroke is performed, to further reduce the indoor temperature of the small refrigerating chamber 20.
In step S19, the calculation control unit 26 stops the blower 25 and closes the damper 28. Since the damper 28 is closed, the warm air heated by the heating portion 117 can be suppressed from entering the small refrigerating chamber 20 and the refrigerating chamber 12 during the defrosting operation.
In step S20, the calculation control unit 26 starts the defrosting stroke. Specifically, the calculation control portion 26 heats the inside of the cooling chamber 115 by supplying power to the heating portion 117, thereby melting the frost adhering to the evaporator 116.
In step S21, the calculation control unit 26 determines whether or not the temperature detected by the defrosting sensor 29 reaches the upper limit temperature.
In the case of yes in step S21, that is, in the case where the temperature detected by the defrosting sensor 29 has reached the upper limit temperature, the calculation control section 26 proceeds to step S22. That is, the power supply to the heating portion 117 is stopped.
In the case of no in step S21, that is, in the case where the temperature detected by the defrosting sensor 29 does not reach the upper limit temperature, the calculation control section 26 proceeds to step S20.
In step S22, the calculation control unit 26 operates the compressor 15 after a lapse of a safe time of about several minutes from the standby time, and cools the air in the cooling chamber 115 by the evaporator 116.
In step S23, the calculation control unit 26 operates the blower 25 and opens the damper 28. In this way, the air inside the cooling chamber 115 cooled by the evaporator 116 is blown to the refrigerating chamber 12, the freezing chamber 13, and the small refrigerating chamber 20.
In step S24, the calculation control unit 26 ends the defrosting stroke, and returns to the normal cooling operation or fresh soft freeze mode.
The above is a description related to the defrosting operation according to the refrigerator 10 related to the present embodiment.
The temperature change of the small refrigerating chamber 20 and the like in the operation of the refrigerator 10 described above will be described with reference to the graph of fig. 4. The horizontal axis of the graph shows elapsed time, and the vertical axis shows indoor temperature. Further, in the graph, the indoor temperature of the refrigerating chamber 12 is shown by a solid line, the indoor temperature of the small refrigerating chamber 20 is shown by a broken line, and the indoor temperature of the freezing chamber 13 is shown by a dash-dot line.
Referring to the graph, in the cooling cycle at the time of the defrosting stroke, the indoor temperature of the small refrigerating chamber 20 is reduced to-5 ℃. The temperature decrease is performed so as to decrease the lower limit temperature in step S12.
In addition, in the defrosting stroke, the freezing cycle is stopped and the heating is performed by the heating unit 117, so that the indoor temperatures of the refrigerating chamber 12, the small refrigerating chamber 20, and the freezing chamber 13 slowly rise. However, since the indoor temperature of the small refrigerating chamber 20 is lowered before the defrosting stroke is performed, the highest temperature of the small refrigerating chamber 20 reaches around-1 ℃, without occurrence of a case where the indoor temperature of the small refrigerating chamber 20 exceeds 0 ℃. Accordingly, the stored object 23 stored in the small refrigerating chamber 20 is not melted, and the freshness thereof can be maintained well.
The present embodiment can achieve the following main effects.
That is, since the lower limit temperature is reduced in the cooling cycle when the defrosting operation is to be performed, the indoor temperature of the small refrigerating chamber 20 can be reduced when the defrosting operation is to be performed. Thus, even if the temperature of the refrigerating chamber 12 rises due to the defrosting operation, the rise in the indoor temperature of the small refrigerating chamber 20 to 0 ℃ or more can be suppressed, and the freshness of the food stored in the small refrigerating chamber 20 can be maintained. For example, according to the present embodiment, the indoor temperature of the small refrigerator compartment 20 can be brought into the range of-2 ℃ to-4 ℃, and the freshness of the stored object 23 stored in the semi-frozen state inside the small refrigerator compartment 20 can be maintained for, for example, ten days or more.
Further, the defrosting operation is started when the freezing compartment 13 is below the lower limit temperature and the small refrigerating compartment 20 is below the lower limit temperature. Specifically, the calculation control portion 26 stops the compressor 15 and performs the defrosting operation after the indoor temperatures of the freezing compartment 13 and the small refrigerating compartment 20 decrease to the lower limit temperature at the time of defrosting. In this way, in the defrosting operation, the indoor temperature of the small refrigerator compartment 20 can be suppressed from rising to a certain temperature or higher.
Further, since the blower 25 is operated in a state in which the damper of the small refrigerator compartment 20 is opened before the defrosting operation is performed, the small refrigerator compartment 20 is further cooled, and thus an increase in the indoor temperature of the small refrigerator compartment 20 can be suppressed in the defrosting operation.
Further, when the user selects the mode of preferentially cooling the small refrigerator compartment 20, the lower limit temperature is lowered in the cooling cycle at the time of the defrosting operation, whereby the small refrigerator compartment 20 can be cooled appropriately according to the user's request, and the energy required for cooling can be reduced.
The present invention is not limited to the foregoing embodiments, and various modifications may be made without departing from the gist of the present invention. Furthermore, the foregoing embodiments may be combined with each other.
Description of the reference numerals
10. Refrigerator with a refrigerator body
11. Heat insulation box
111. Outer box
112. Inner box
113. Heat insulating material
115. Cooling chamber
116. Evaporator
117. Heating part
118. Air supply path
12. Refrigerating chamber
13. Freezing chamber
14. Mechanical room
15. Compressor with a compressor body having a rotor with a rotor shaft
16. Air supply port
17. Heat insulation wall
18. Heat insulation door
19. Heat insulation door
20. Small refrigerating chamber
21. Storage container
22. Temperature sensor for small refrigerating chamber
23. Stored article
24. Time-piece
25. Blower fan
26. Calculation control unit
27. Freezing chamber temperature sensor
28. Air door
29. Defrosting sensor
Claims (10)
- A refrigerator, comprising:a refrigerating chamber;a small refrigerating chamber partitioned inside the refrigerating chamber;a small refrigerating chamber temperature sensor for measuring an indoor temperature of the small refrigerating chamber;a cooling chamber that cools air blown to the small refrigerating chamber by a cooler;a heating unit that defrost the cooler by heating;a blower blowing the air from the cooling compartment to the refrigerating compartment; anda calculation control unit;the calculation control part performs a cooling cycle of operating the cooler and the blower such that an indoor temperature of the small refrigerating compartment measured with the small refrigerating compartment temperature sensor reaches a first upper limit temperature or less and a first lower limit temperature or more,wherein the calculation control unit decreases the set value of the first lower limit temperature in the cooling cycle immediately before the defrosting operation.
- The refrigerator of claim 1, further comprising:a freezing chamber; anda freezing chamber temperature sensor for measuring an indoor temperature of the freezing chamber;the calculation control part cools the freezing chamber such that the indoor temperature of the freezing chamber measured with the freezing chamber temperature sensor reaches a second upper limit temperature or less and a second lower limit temperature or more,wherein, in the cooling cycle at the time of the defrosting operation, the calculation control section performs the defrosting operation when the indoor temperature of the freezing compartment measured with the freezing compartment temperature sensor is the second lower limit temperature or less and the indoor temperature of the small refrigerating compartment measured with the small refrigerating compartment temperature sensor is the first lower limit temperature or less.
- The refrigerator according to claim 1 or 2, further comprising a damper provided in a ventilation path connecting the cooling chamber and the small refrigerating chamber, wherein the calculation control portion operates the blower with the damper in an open state before the defrosting operation is performed.
- The refrigerator of claim 3, wherein the damper is a multi-path damper capable of independently opening and closing a supply passage connected to the refrigerating compartment and a supply passage connected to the small refrigerating compartment.
- The refrigerator according to claim 1 or 2, wherein the refrigerator is configured to be able to select a mode in which the small refrigerating chamber is preferentially cooled, and in a case where the mode in which the small refrigerating chamber is preferentially cooled is selected, the calculation control portion decreases a set value of the first lower limit temperature in the cooling cycle at the time of the defrosting operation.
- A control method of a refrigerator, comprising the steps of:detecting whether a fresh-keeping soft freezing mode is selected;when the selected fresh soft freeze mode is detected, the set point of the first lower temperature of the partitioned small refrigeration compartment located inside the refrigeration compartment is reduced.
- The control method according to claim 6, characterized in that the method further comprises:judging whether the operation accumulated time of the compressor reaches the designated time or not;if so, judging whether the indoor temperature of the small refrigerating chamber reaches the first lower limit temperature, and stopping the compressor when the indoor temperature of the small refrigerating chamber reaches the first lower limit temperature;if not, continuing to judge whether the accumulated time of the operation of the compressor reaches the designated time.
- The control method according to claim 7, wherein the step of "judging whether or not the compressor operation cumulative time reaches the specified time" further comprises:if so, judging whether the indoor temperature of the freezing chamber reaches the second lower limit temperature, and judging whether the indoor temperature of the small refrigerating chamber reaches the first lower limit temperature when the indoor temperature of the freezing chamber reaches the second lower limit temperature;if not, continuing to judge whether the accumulated time of the operation of the compressor reaches the designated time.
- The control method according to claim 7, characterized in that after stopping the compressor, the control method further comprises:the control air door operates the fan for a specified time in a state of supplying air to the small refrigerating chamber only.
- The control method according to claim 9, characterized in that after operating the blower for a specified time, the control method further comprises:stopping the blower and closing the air door;the defrost stroke is started.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-124977 | 2021-07-30 | ||
| JP2021124977A JP2023019909A (en) | 2021-07-30 | 2021-07-30 | refrigerator |
| PCT/CN2022/108786 WO2023006052A1 (en) | 2021-07-30 | 2022-07-29 | Refrigerator and control method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117795272A true CN117795272A (en) | 2024-03-29 |
Family
ID=85086306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280053230.7A Pending CN117795272A (en) | 2021-07-30 | 2022-07-29 | Refrigerator and control method thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2023019909A (en) |
| CN (1) | CN117795272A (en) |
| WO (1) | WO2023006052A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166908C (en) * | 1999-07-16 | 2004-09-15 | 松下冷机株式会社 | Refrigerator |
| JP4644271B2 (en) * | 2008-06-09 | 2011-03-02 | 日立アプライアンス株式会社 | refrigerator |
| JP5386243B2 (en) * | 2009-06-18 | 2014-01-15 | 日立アプライアンス株式会社 | refrigerator |
| JP5260416B2 (en) * | 2009-06-18 | 2013-08-14 | 日立アプライアンス株式会社 | refrigerator |
| JP5622758B2 (en) * | 2012-02-15 | 2014-11-12 | 日立アプライアンス株式会社 | refrigerator |
| JP2015036600A (en) * | 2013-08-13 | 2015-02-23 | 日立アプライアンス株式会社 | Refrigerator |
-
2021
- 2021-07-30 JP JP2021124977A patent/JP2023019909A/en active Pending
-
2022
- 2022-07-29 CN CN202280053230.7A patent/CN117795272A/en active Pending
- 2022-07-29 WO PCT/CN2022/108786 patent/WO2023006052A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023019909A (en) | 2023-02-09 |
| WO2023006052A1 (en) | 2023-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7707847B2 (en) | Ice-dispensing assembly mounted within a refrigerator compartment | |
| KR100568060B1 (en) | Refrigerator | |
| US7021066B2 (en) | Control method for refrigerator | |
| JP2003172573A (en) | Refrigerator having multi-purpose chamber, and control method thereof | |
| JPH11311473A (en) | Method for controlling refrigerator | |
| JPH10111064A (en) | Control method for cooling fan of refrigerator | |
| US11549740B2 (en) | Refrigerator and controlling method for the same | |
| CN101995131A (en) | Refrigerator | |
| JP4498261B2 (en) | refrigerator | |
| CN117795272A (en) | Refrigerator and control method thereof | |
| JP2009085502A (en) | Refrigerator | |
| JP6309156B2 (en) | refrigerator | |
| JP6837423B2 (en) | refrigerator | |
| KR101290496B1 (en) | A refrigerator | |
| KR100772233B1 (en) | Refrigerator and controlling method thereof | |
| JP2001255050A (en) | Refrigerator | |
| KR20070043170A (en) | Apparatus and method of thawing control in refrigerator | |
| WO2023030186A1 (en) | Refrigerator | |
| KR100545418B1 (en) | Defrosting method for a refrigerator | |
| KR100228853B1 (en) | Refrigerator cooling fan control method | |
| JP2019027649A (en) | refrigerator | |
| EP3732413B1 (en) | A cooler comprising a heat controlled special compartment | |
| US20240133621A1 (en) | Refrigerator and control method thereof | |
| CN111288712B (en) | Refrigerator with a door | |
| CN111288713B (en) | Refrigerator with a door |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |