JP4080811B2 - refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes an evaporator for a refrigerator compartment and an evaporator for a freezer compartment, has a refrigeration cycle that circulates refrigerant to the refrigerator compartment or freezer compartment side using a switching valve, and switches between refrigerator compartment cooling and freezer compartment cooling. It is related with the refrigerator cooled alternately.
[0002]
[Prior art]
In recent years, household refrigerators have been designed to save power in accordance with the increase in size, and among them, a configuration having an evaporator for a refrigerator compartment and an evaporator for a freezer compartment has been commercialized. Here, the refrigerator having the above configuration will be described with reference to the drawings. FIG. 3 is a perspective view showing a conventional refrigerator. 4 is a schematic longitudinal sectional view taken along the line BB of FIG. FIG. 5 is an explanatory diagram showing a refrigeration cycle.
[0003]
The refrigerator main body 1 forms a heat insulation box body from the heat insulating material 4 filled with foam between the inner box 2 and the outer box 3, and arranges the refrigerator compartment 5, the vegetable compartment 6, and the freezer compartment 9 in order from the top, Between the vegetable room 6 and the freezing room 9, there is a storage room provided with an ice making room 7 and a switching room 8. The refrigerator compartment 5 and the vegetable compartment 6 are partitioned by a plastic partition plate 13, and the vegetable compartment 6, the ice making compartment 7, the switching room 8, and the freezer compartment 9 are partitioned by heat insulating walls 21 and 23, respectively. The partition plate 13 is provided with an air outlet 12 so that the air flow in the refrigerator compartment 5 and the vegetable compartment 6 communicates.
[0004]
A rotary door 5a is pivotally supported at the opening of the refrigerator compartment 5, and a rear duct 10a and a ceiling duct 10b are formed on the rear and ceiling surfaces of the refrigerator compartment 5, respectively. A duct cover 11 is attached to the front surface of the rear duct 10a. The duct cover 11 detects the temperature of the refrigerator compartment in order to control cooling of the plurality of R outlets 11a through which the cold air is blown out, the refrigerator compartment 2, and the vegetable compartment 3. A refrigeration temperature sensor 50 (hereinafter referred to as R sensor) is attached.
[0005]
The vegetable room is provided with a drawer-type door 6a and is provided with a storage container 15 that is taken in and out of the cabinet in accordance with the opening / closing operation of the door 6a. A refrigeration cooler chamber 19 is provided on the back side of the vegetable compartment 6 and includes a refrigeration fan 14 (hereinafter referred to as R fan) and a refrigeration evaporator 35 (hereinafter referred to as R EVA). Yes. The front surface of the refrigerated cooler chamber 19 is covered with a refrigerated cooler chamber cover 17. A V outlet 16 for blowing cool air into the vegetable compartment is provided at the upper part of the cover, and an inlet 18 is provided at the lower part.
[0006]
The outer box 3 located behind the refrigerated cooler chamber 19 has a control board 60 that is a control unit of the refrigerator main body 1, and this control board 60 is connected to the internal and external electrical components including the R sensor 50 and leads. It is electrically connected via a wire.
[0007]
A freezing cooler chamber 25 is provided on the back side of the ice making chamber 7, the switching chamber 8, and the freezing chamber 9, and a freezing fan 22 (hereinafter referred to as F fan) and a freezing evaporator 36 (hereinafter referred to as F) are provided therein. And a freezing defrost heater 24 and the like. A refrigeration cooler chamber cover 26 is provided in front of the refrigeration cooler chamber 25, and a refrigeration temperature sensor that detects the temperature of the freezer compartment 9 for cooling control of the freezer compartment 9, the ice making chamber 7, and the switching chamber 8 is provided on this cover. 51 (hereinafter referred to as F sensor) is attached. The ice making chamber 7 is provided with a temperature sensor for ice making, and the switching chamber 8 is provided with a dedicated temperature sensor.
[0008]
A machine room 27 is provided at the bottom of the back surface of the refrigerator main body 1, and a compressor 30, a machine room fan 28 (hereinafter referred to as “C fan”) and the like are provided therein.
[0009]
On the other hand, in the refrigeration cycle, as shown in FIG. 5, a compressor 30, a condenser 31, and a switching valve 31 that switches a refrigerant flow or performs a fully closed or fully opened operation are connected in series, A connecting pipe connecting a freezing capillary tube 34 (hereinafter referred to as an F capillary), an F evaporator 36, an accumulator 37, and a check valve 38; Are connected in parallel.
[0010]
In addition, the basic cooling control of each chamber includes a refrigeration operation mode in which a refrigerant is supplied to a connecting pipe connected to the R capillary 33 and the R evaporator 35 based on detection temperatures of the R sensor 50 and the F sensor 51, and an F capillary. Cooling control is performed by operating the switching valve 26 to alternately switch the flow of the refrigerant in the refrigeration operation mode in which the refrigerant is supplied to the connecting pipe connecting the tube 34, the F evaporator 36, the accumulator 37, and the check valve 38. It is composed.
[0011]
[Problems to be solved by the invention]
However, since the R sensor 50 is attached to the duct cover 11 of the refrigerating room, it is greatly affected by the cold air blown from the R outlet 11a provided in the vicinity of the R sensor 50, and the reliability of the detected temperature with respect to the target temperature is low. There was a problem.
[0012]
In the first place, the purpose of the temperature sensor is to maintain the entire interior at the target temperature. However, when food is placed in front of the R outlet 11a, the cold air passage is blocked by the food, and the space between the R outlet 11a and the food is different from other spaces. The temperature drops. Therefore, when the R sensor 50 detects the temperature of this space and performs cooling control, the entire interior may be held higher than the target temperature.
[0013]
Further, immediately after switching to the refrigeration operation mode, immediately after the start of the compressor 30 and the R fan 14, the difference between the cold air temperature blown out from the R outlet 11a and the internal temperature is large, and the detected temperature of the R sensor 50 Is rapidly lowered under the influence of the blown-out cool air, but it takes a considerable time until the temperature in the whole chamber falls, so an error occurs between the temperature detected by the R sensor 50 and the actual inside temperature. It will be.
[0014]
Therefore, since the detection temperature of the R sensor 50 changes due to the influence of cold air depending on the food product placement state or the cooling operation state, the reliability of the R sensor 50 is low, and the entire refrigerator compartment with respect to the target temperature. It was difficult to maintain the temperature accurately.
[0015]
In the vegetable compartment 6, when the temperature in the vegetable compartment 6 rises rapidly, such as when the door 6a is opened for a long time, the R sensor 50 that detects the temperature in the cabinet in order to control the cooling of the vegetable compartment 6, Since it is provided in the refrigerator compartment 5 side that is the upstream side of the cold air, this temperature rise cannot be detected quickly, and it is not suitable for cooling control of the vegetable compartment 6.
[0016]
Moreover, in the refrigerator provided with the control board 60 on the back of the vegetable compartment 6, since lead wires etc. have to be extended to the refrigerator compartment 5, it became expensive. Furthermore, since the mounting position of the R sensor 50 is the duct cover 11 that is easy to enter into the eyes of the user, the appearance design is damaged.
[0017]
The present invention has been made in consideration of the above problems, and an object of the present invention is to obtain a refrigerator that can quickly and accurately detect temperature changes in a refrigerator room and a vegetable room.
[0018]
[Means for Solving the Problems]
The invention of claim 1 is provided with at least a refrigerator compartment, a vegetable compartment, and a freezer compartment, a refrigerator, a condenser, a refrigerator for cooling the refrigerator compartment and the vegetable compartment, and a freezer for cooling the freezer compartment. And a refrigeration fan that circulates the cold air from the refrigeration evaporator to the refrigeration room and the vegetable room, and the cold air from the refrigeration evaporator is blown into the cold room by the refrigeration fan, While returning to the refrigeration evaporator again through the vegetable compartment, a refrigeration temperature sensor for detecting the room temperature of the refrigeration compartment and the vegetable compartment is attached to the vegetable compartment side.
[0019]
According to the above configuration, since the refrigeration temperature sensor is not provided in the vicinity of the cold air outlet as in the conventional case, the detection temperature is accurately detected without being influenced by the food storage state or the like. Therefore, the reliability of the refrigeration temperature sensor can be improved.
[0020]
In addition, by installing a refrigeration temperature sensor in the vegetable room on the downstream side of the cold air flow, even if the refrigeration room or vegetable room is overloaded and the temperature rises suddenly, the temperature rise is reliably detected. can do. Conversely, even when one of the cooling chambers reaches a supercooled state due to cooling operation, such as when the outside air temperature is low, the temperature is detected on the downstream side of the cold air, so the temperature state of the refrigerator room and vegetable room Can be surely grasped.
[0021]
The invention of claim 2 is characterized in that the refrigeration fan is rotated when the switching valve is switched so that the refrigerant flows through the refrigeration evaporator.
[0022]
According to the present invention, when the switching valve is switched so that the refrigerant flows into the refrigeration evaporator, that is, in the refrigeration operation mode, the air in the refrigeration room and the vegetable room is circulated by the rotation of the refrigeration fan. Even if any one of the vegetable rooms is overloaded and the temperature inside the cabinet rises, the temperature rise can be detected quickly.
[0023]
Specifically, when the temperature of the vegetable room rises, the refrigeration temperature sensor is provided on the vegetable room side, so that the atmospheric temperature in the room can be detected quickly. On the other hand, when the temperature of the refrigerator compartment rises, the heated room air is blown to the vegetable compartment on the downstream side of the cold air by the rotation of the refrigeration fan, and the vegetable compartment is also affected by the temperature rise of the refrigerator compartment. Since temperature rises, it can detect rapidly that the temperature of the refrigerator compartment rose by detecting the temperature in a vegetable compartment.
[0024]
In the state where the refrigerant is flowing in the refrigeration evaporator, that is, in the refrigeration operation mode, moisture in the air forms frost on the refrigeration evaporator, so that the refrigeration evaporation is performed even in the refrigeration operation mode. The vessel maintains a low temperature of about -3 ° C. Therefore, since the cold air blown out to the refrigerator compartment is almost the same temperature as the room temperature or lower, the rotation of the refrigerator fan does not greatly affect the temperature rise of the refrigerator compartment and the vegetable compartment. The air containing water adhering to can be reduced to each storage chamber, and high humidity can be maintained.
[0025]
According to a third aspect of the present invention, there is provided a storage container in which at least a refrigerator compartment, a drawer door-type vegetable compartment, and a freezer compartment are arranged in order from the top, and is drawn out of the cabinet in conjunction with an opening operation provided in the vegetable compartment. A partition plate with a ventilating hole for partitioning the vegetable compartment and the refrigerator compartment and circulating the cold air, a compressor, a condenser, a refrigerator for cooling the refrigerator compartment and the vegetable compartment, and a freezer evaporator for cooling the freezer compartment A refrigeration cycle having a switching valve for switching a refrigerant flow between a refrigeration evaporator and a refrigeration evaporator, and a refrigeration fan for exchanging heat between the refrigeration evaporator and the air in the refrigeration room and the vegetable compartment, The cold air exchanged with the refrigeration evaporator is blown into the refrigeration room by the rotation of the refrigeration fan, cools the room, then flows into the vegetable room through the vents, and cools the room. Return to the vicinity of the refrigeration evaporator from the suction port The refrigeration fan is rotated even when the switching valve is switched so that the refrigerant flows into the refrigeration evaporator, and the internal temperature is detected for cooling control of the refrigeration room and the vegetable room. The refrigeration temperature sensor is attached to the back of the vegetable room or in the vicinity of the vent.
[0026]
According to the above configuration, the effects of claims 1 and 2 are achieved, and in the conventional configuration, the refrigeration temperature sensor is attached to a place that is easily accessible to the user, such as a duct cover of the refrigeration room. Since the refrigeration temperature sensor is provided in the vegetable room that cannot be seen by a storage container or the like, the appearance design in the cabinet can be improved.
[0027]
In addition, since the refrigeration temperature sensor is attached to the back of the vegetable room and near the ventilation opening, the detection temperature does not change depending on the state of food placement, etc., so the reliability of the refrigeration temperature sensor is improved. be able to.
[0028]
The invention according to claim 4 is characterized in that a control board for performing cooling control and the like is arranged in an outer box located on the back of the vegetable compartment, and the arrangement position of the control board and the refrigeration temperature sensor is close to each other. Therefore, the lengths of the lead wires that are electrically connected to each other can be shortened, and can be manufactured at low cost, and the workability of the assembly can be improved.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described based on the drawings. In addition, in the case of the same structure as the conventional refrigerator, the same code | symbol is attached | subjected and description of the structure is abbreviate | omitted.
[0030]
1 is a schematic front view showing a refrigerator main body from which a door and a partition plate 13 are removed for explanation of the configuration, and FIG. 2 is a longitudinal sectional view taken along line AA of FIG. As shown in FIGS. 1 and 2, the left-hand rule of the refrigeration cooler room 19 provided on the back of the vegetable room 6 is a deodorizer 52 provided on the partition plate 13 as shown in FIG. A storage case 40 for storing the power connector of the water supply pump 53 is attached.
[0031]
The storage case 40 is formed of a storage member 41 and a storage cover 45, and the storage member 41 is provided with openings not shown in the upper surface portion and the right regular surface portion. The connector from the electrical component is received from the opening provided in the upper surface portion, and the relay connector from the control board 60 is received from the opening provided in the right regular surface portion through the outlet provided in the rear surface of the refrigeration cooler chamber 19. It is incorporated in the member 41.
[0032]
A sensor mounting portion 43 is formed on the upper surface of the storage member 41 along with the opening, and the R sensor 50 is mounted on the sensor mounting portion 43. The bundled wire of the R sensor 50 is wired directly from the control board 60 via the outlet and each opening, not via the relay connector, and the sensor mounting portion 43 is attached by pressing the R sensor 50 to the mounting portion. A claw portion 44 is formed so as to be fixed.
[0033]
The arrangement position of the sensor mounting portion 43 is provided in the depth direction in the interior from the V outlet 16 so as not to be affected by the cold air from the V outlet 16 in the depth direction. On the other hand, it is provided between the partition plate 13 and the crispa cover 20, and is disposed in the vicinity of the air blowing port 12.
[0034]
On the other hand, a sensor protection part 46 is formed on the upper surface of the storage cover 45, and the sensor protection part 46 has a slit shape so that the R sensor 50 can easily detect the ambient temperature.
[0035]
Next, the operation of the R fan 14 will be described with reference to FIGS.
[0036]
When the switching valve 32 is switched to the R flow, that is, in the refrigeration operation mode, the R fan 14 is controlled to operate at a predetermined rotational speed in accordance with the internal temperature and the rotational speed of the compressor 30. At this time, when the internal temperature becomes equal to or lower than the target temperature and the operation of the compressor 30 is stopped and the cooling is stopped, the R fan 14 is used to reduce the moisture frosted on the R evaporator 35 to the refrigerator compartment 5 and the vegetable compartment 6. May be rotated at low speed.
[0037]
On the other hand, when the switching valve 32 is switched to F flow, that is, during the refrigeration operation mode, the R fan 14 is controlled to operate at low speed. This is to reduce the water adhering to the R-evapor 35 to the refrigerator compartment 5 and the vegetable compartment 6, but when the temperature of the R-eva 35 is higher than room temperature, for example, 3 ° C. or more, frost adhering to the R-eva 35 Is completely melted, it is preferable to stop the R fan 14 at this time. Further, even during the refrigeration operation mode, that is, in a state where the refrigerant does not flow through the R-evapor 35, frost is attached to the R-eva 35 as described above, so the R-evaporation temperature is maintained at a low temperature of about −3 ° C. Therefore, the internal temperature does not rise rapidly due to the rotation of the R fan 14.
[0038]
In addition, when the opening of the refrigerator compartment 5 is detected in common with both modes, the R fan 14 is stopped so that the cool air inside the refrigerator does not leak out of the refrigerator. At this time, immediately before the opening is detected, for example, for about 10 seconds, it may be rotated to perform cold air from the ceiling duct 10a, so-called air curtain action.
[0039]
Accordingly, in both the refrigeration operation mode and the refrigeration operation mode, the R fan 14 is configured to rotate constantly or intermittently during the normal cooling operation. When the temperature is increased by opening the door, the R sensor 50 changes the temperature of the refrigerating room 5 by constantly or intermittently blowing the air in the refrigerating room 5 to the vegetable room 6 on the downstream side of the cold air. It can be detected quickly.
[0040]
Next, the cold air circulation air path of the refrigerator compartment 5 and the vegetable compartment 6 will be described with reference to FIGS.
[0041]
The air in the refrigerated cooler chamber 19 is heat-exchanged with the R EVA 35 to become cold air, a part of which is blown out from the V outlet 16 to the upper surface portion of the Chrispa cover 20, and the other cold air is backed by the rotation of the R fan 14. After being blown into the duct 10a, it is blown out from the R outlet 11a onto each shelf of the refrigerator compartment 5 and blown out toward the inside of the door 5a via the ceiling duct 10b.
[0042]
The cool air blown into the refrigerator compartment 5 cools the interior of the refrigerator, blows through the upper surface of the partition plate 17, and is blown out from the ventilation port 12 to the upper surface of the clip spa cover 20. The cold air blown out and the cold air blown out from the V outlet 16 are blown toward the inside of the door along the Chrispa cover 20 and indirectly through the outer wall of the front surface and the bottom surface of the storage container 15 in the vegetable compartment 6. Cool. The air that has been cooled is returned to the refrigeration cooler chamber 19 through the suction port 18 and is configured to exchange heat with the R evaporator 35 again.
[0043]
Therefore, even when the temperature rises in the refrigerator compartment 5, since the R sensor 50 is provided in the vegetable compartment 6 on the downstream side of the cold air, the temperature rise in the refrigerator compartment 5 can be detected quickly and reliably. In addition, in the case of the vegetable room 6, it goes without saying that the temperature change in the room can be detected quickly and reliably.
[0044]
As described above, according to the configuration of the present invention, the R sensor 50 that detects the inside temperature in order to control the cooling of the refrigerator compartment 5 and the vegetable compartment 6 is disposed on the vegetable compartment 6 side. As described above, the temperature inside the cabinet can be accurately detected without being affected by the placement state of the food items placed on the shelves of the refrigerator compartment 5, thereby improving the reliability of the R sensor 50. be able to.
[0045]
By providing the R sensor 50 in the vegetable compartment 6 on the downstream side of the cold air flow, even if the refrigerator compartment 5 or the vegetable compartment 6 is overloaded and the temperature rises suddenly, the temperature rise is ensured. Can be detected. Conversely, even when one of the cooling chambers reaches a supercooled state due to the cooling operation, such as when the outside air temperature is low, the temperature is detected on the downstream side of the cold air. It is possible to reliably grasp the temperature state.
[0046]
Unlike the case where the R sensor 50 is attached to the back of the vegetable compartment 5, it is different from the case where the R sensor 50 is attached to the refrigeration compartment 5, and the food product stored in the storage container 15 is placed or immediately after the compressor 30 is started. It is possible to suppress and prevent the detected temperature from being influenced by the influence of the cold air blown out from each outlet.
[0047]
In this case, it is more effective to attach the R sensor 50 to the back side than the V outlet 16 in the depth direction. In addition, since the user cannot see the mounting location of the R sensor 50, the appearance design can be improved. Furthermore, by arranging the R sensor 50 in the vicinity of the air blowing port 12 through which the air from the refrigerator compartment 5 flows into the vegetable compartment 6, the temperature change of the refrigerator compartment 5 can be detected quickly and reliably.
[0048]
Even in the refrigeration mode, by rotating the R fan 14, the air in the refrigerator compartment 5 and the vegetable compartment 6 is circulated constantly or intermittently, and even when either one is overloaded and the temperature rises. A temperature change can be detected quickly and reliably.
[0049]
If it is the refrigerator which provided the control board 60 in the back surface of the vegetable compartment 5, while being able to shorten the wiring of R sensor 50 compared with the past, the workability | operativity of an assembly can be improved.
[0050]
In addition, the structure demonstrated above is only one Embodiment, A various change is possible unless a summary is changed. For example, the attachment position of R sensor 50 is not restricted to this, You may attach to the side wall and bottom face of a vegetable room, or a refrigerator compartment cover. Moreover, the structure provided in R refrigerator and R fan in the refrigerator compartment may be sufficient.
[0051]
【The invention's effect】
The refrigerator which can detect the temperature change of a refrigerator compartment and a vegetable room rapidly and correctly can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a refrigerator showing an embodiment of the present invention.
2 is an AA longitudinal sectional view showing the refrigerator main body of FIG. 1; FIG.
FIG. 3 is a perspective view showing a conventional refrigerator.
4 is a BB longitudinal sectional view showing the refrigerator main body of FIG. 3. FIG.
FIG. 5 is an explanatory diagram showing the present invention and a conventional refrigeration cycle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body 5 ... Refrigeration room 6 ... Vegetable room 9 ... Freezer room 12 ... Air blower 13 ... Partition plate 14 ... R fan 15 ... Storage container 16 ... V outlet 18 ... Suction port 19 ... Refrigeration cooler room 20 ... Crispa Cover 30 ... Compressor 31 ... Condenser 32 ... Switch valve 35 ... R Eva 36 ... F Eva 40 ... Storage case 41 ... Storage member 43 ... Sensor mounting part 44 ... Nail part 45 ... Storage cover 46 ... Sensor protection part 50 ... R Sensor 60 ... Control board

Claims (4)

At least a refrigeration room, a vegetable room, and a freezing room are arranged, and a compressor, a condenser, a refrigeration evaporator for cooling the refrigeration room and the vegetable room, a freezing evaporator for cooling the freezing room, and a refrigeration room A refrigeration fan that circulates cold air from the evaporator to the refrigeration room and the vegetable room, and the cold air from the refrigeration evaporator is blown into the refrigeration room by the refrigeration fan and then refrigerated again through the vegetable room. A refrigerator having a refrigeration temperature sensor for detecting the room temperature of the refrigerator compartment and the vegetable compartment attached to the vegetable compartment side while returning to the evaporator. 2. The refrigerator according to claim 1, wherein the refrigeration fan is rotated when the switching valve is switched so that the refrigerant flows through the refrigeration evaporator. At least a refrigerated room, a drawer door type vegetable room, and a freezer room are arranged in order from the top, and a storage container that is pulled out of the cabinet in conjunction with an opening operation provided in the vegetable room, a vegetable room, and a refrigerator room Partition plate with vent holes for circulating partition cold air, compressor, condenser, refrigeration evaporator for cooling refrigerator compartment and vegetable compartment, freezer evaporator for cooling freezer compartment, refrigerant flow for refrigeration A refrigerating cycle having a switching valve for switching between an evaporator and a refrigerating evaporator; a refrigerating evaporator; and a refrigerating fan for heat exchange between air in the refrigerating room and the vegetable room, and heat exchange with the refrigerating evaporator. The chilled air is blown into the refrigerated room by the rotation of the refrigeration fan, cools the room, then flows into the vegetable room from the ventilation port, cools the room, and then from the suction port provided on the back of the vegetable room. It is returned to the vicinity of the refrigeration evaporator and heat is exchanged again. In addition, the refrigeration fan rotates even when the switching valve is switched so that the refrigerant flows into the refrigeration evaporator, and a refrigeration temperature sensor that detects the internal temperature to control cooling of the refrigeration room and the vegetable room, A refrigerator mounted on the back side of the vegetable room or in the vicinity of the vent. The refrigerator according to any one of claims 1 to 3, wherein a control board for performing cooling control and the like is disposed in an outer box located on the back of the vegetable compartment.

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