JP2022063354A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that can exert high energy-saving performance regardless of outside temperature, and has high space efficiency.

SOLUTION: A refrigerator 1 is equipped with a heat insulation partition wall 28 that blows air exchanging heat with a freezing evaporator 14b by the drive of a freezing fan 9b to cool a freezing zone chamber 7 and a vegetable compartment cooler 6, and partitions the freezing temperature zone chamber 7 and a refrigeration cooler 2, and a heat insulation partition wall 29 that partitions the freezing temperature zone chamber 7 and the vegetable compartment cooler 6. A vegetable compartment cooler returning air path 18 is provided in the heat insulation partition wall 29. When sending cold air to the vegetable compartment cooler 6, the rotation speed of a compressor 24 is brought into a higher-speed drive state than rotation speed during refrigerating operation, thereby making the freezing evaporator 14b lower than the temperature of the freezing evaporator during the refrigerating operation. The amount of air supplied to the vegetable compartment cooler 6 is smaller than the amount of air supplied to the freezing temperature zone chamber 7.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a refrigerator.

As background techniques in this technical field, for example, Japanese Patent Application Laid-Open No. 2006-64256 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2006-250406 (Patent Document 2) are available.

In Patent Document 1, the outer shell of the main body is composed of a heat insulating box body, and the internal space (that is, the inside of the refrigerator) of the heat insulating box body is a refrigerating room, an ice room, a select room in which freezing or refrigerating can be selected from above. It is equipped with a freezer room and a vegetable room, and the refrigerating room is cooled by the first evaporator, which is an evaporator for the refrigerating room, and the ice room, the select room, and the freezer room are cooled by the second evaporator, which is the evaporator for the freezer room. As the vegetable compartment, a refrigerator that is indirectly cooled by the cold air of the freezer compartment is disclosed (for example, FIG. 3 of Patent Document 1).

Patent Document 2 discloses a refrigerator in which a refrigerating room, a freezing room, and a vegetable room are formed from above, and a refrigerator provided in the refrigerating room cools the refrigerating room and the vegetable room (for example, Patent Document 2). Paragraph 0011).

Japanese Unexamined Patent Publication No. 2006-64256 Japanese Unexamined Patent Publication No. 2006-250406

In the refrigerator described in Patent Document 1, the refrigerating room is cooled by the evaporator for the refrigerating room, the ice room, the select room and the freezing room are cooled by the evaporator for the freezing room, and the vegetable room provided below the freezing room is provided. Is indirectly cooled by the cold air of the freezer through a partition wall between the freezer and the freezer.

When indirectly cooling the vegetable compartment, it is necessary to promote heat transfer through the partition wall in order to increase the cooling capacity of the vegetable compartment. Generally, in order to promote heat transfer through a partition wall, it is effective to widen the temperature difference between the spaces (freezing room and vegetable room) separated by the partition wall. Therefore, the load on the vegetable compartment is large due to reasons such as the high ambient temperature, storing high-temperature food in the vegetable compartment, or creating a gap between the vegetable compartment door and the box due to sandwiching food or the like. When it is necessary to sufficiently increase the cooling capacity, it is necessary to keep the freezing room at an excessively low temperature, which causes a problem that the energy saving performance is deteriorated.

Further, the refrigerator described in Patent Document 2 is a cooler provided in the refrigerating room to cool the refrigerating room and the vegetable room. Therefore, a route for sending cold air from the refrigerating room to the vegetable room and refrigerating from the vegetable room are used. Since a route for returning cold air to the room is required, the problem is that the space efficiency is low, that is, the internal volume is reduced.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a refrigerator capable of exhibiting high energy-saving performance regardless of the temperature of the outside air and having high space efficiency.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above problems. For example, the first refrigerating temperature zone chamber is fixed above the refrigerating temperature zone chamber, and the refrigerating temperature zone is fixed below the refrigerating temperature zone chamber. The first evaporator, which is provided with a vegetable compartment and is located substantially behind the first refrigerating temperature zone chamber, the first evaporator storage chamber for accommodating the first evaporator, and heat exchange with the first evaporator. A first air blowing path that guides the air from the first refrigerating temperature zone chamber to the first refrigerating temperature zone chamber, and a first return path that guides air from the first refrigerating temperature zone chamber to the first refrigerating temperature zone chamber. The first blower that forms a circulating air flow in the first refrigerating temperature zone chamber and the first evaporator that is located substantially behind the refrigerating temperature zone chamber and whose temperature during the refrigerating operation is lower than that of the first evaporator during the refrigerating operation. (Ii) The second evaporator, the second evaporator storage chamber for accommodating the second evaporator, and the second air blower that guides the air that has exchanged heat with the second evaporator from the second evaporator storage chamber to the refrigerating temperature zone chamber. The path, the second return path for guiding air from the refrigerating temperature zone chamber to the second evaporator storage chamber, the vegetable chamber air passage for guiding air from the second air passage to the vegetable chamber, and the vegetable chamber to the vegetable chamber. It has a vegetable compartment return air passage that guides air to the second evaporator storage chamber, and a second blower that forms a circulating air flow in the refrigerating temperature zone chamber and the vegetable compartment, and exchanges heat with the second evaporator. The first heat insulating partition wall that separates the refrigerating temperature zone chamber and the first refrigerating temperature zone chamber by blowing air by driving the second blower to cool the refrigerating temperature zone chamber and the vegetable chamber. A second heat insulating partition wall separating the refrigerating temperature zone room and the vegetable room is further provided, and the vegetable room return air passage is provided in the second heat insulating partition wall to allow cold air to the vegetable room. At the time of feeding, the rotation speed of the compressor is set to a drive state higher than the rotation speed during the refrigerating operation, so that the temperature of the second evaporator is lower than the temperature of the first evaporator during the refrigerating operation. The air volume supplied to the vegetable compartment is smaller than the air volume supplied to the refrigerating temperature zone chamber.

According to the present invention, it is possible to provide a refrigerator that can exhibit high energy-saving performance regardless of the temperature of the outside air and has high space efficiency.

Front view of the refrigerator according to the first embodiment AA sectional view of FIG. BB sectional view of FIG. Schematic diagram showing the refrigerating cycle configuration of the refrigerator according to the first embodiment. A flowchart showing the control of the refrigerator according to the first embodiment. An example of a time chart showing the control of the refrigerator according to the first embodiment. Moriel diagram showing the state of the refrigerant of the refrigerator according to the first embodiment. The schematic diagram which shows the structure of the refrigerator of the comparative example. Schematic diagram showing the configuration of the refrigerator of Example 2. Schematic diagram showing the configuration of the refrigerator of Example 3

Hereinafter, examples of the present invention will be described in detail with reference to the drawings as appropriate.

A first embodiment (Example 1) of the refrigerator according to the present invention will be described. First, the configuration of the refrigerator according to the first embodiment will be described with reference to FIGS. 1 to 4. 1 is a front view of the refrigerator according to the first embodiment, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB of FIG. 2, and FIG. 4 is a refrigerating cycle of the refrigerator according to the first embodiment. It is a schematic diagram which shows the structure. The box body 10 of the refrigerator 1 is open to the front, and from above, the refrigerating chamber 2 (first refrigerating temperature zone chamber), the ice making chambers 3 arranged side by side on the left and right, the upper freezing chamber 4, the lower freezing chamber 5, and the vegetables. Storage chambers are formed in the order of chamber 6 (second refrigerated temperature zone chamber). The front opening of the refrigerating room 2 is opened and closed by the rotary refrigerating room doors 2a and 2b divided into left and right, and the front opening of the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 is. It is opened and closed by a pull-out type ice making room door 3a, an upper freezing room door 4a, a lower freezing room door 5a, and a vegetable room door 6a, respectively. Each door is equipped with packing (not shown) on the inner periphery of the refrigerator, and when the door is closed, it comes into contact with the leading edge of the box 10 to suppress the flow of air inside and outside the refrigerator. There is. In the following, the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 are collectively referred to as a freezing temperature zone chamber 7.

The external dimensions of the refrigerator 1 are 685 mm in width, 738 mm in depth, and 1833 mm in height, and the rated internal volumes based on JIS9801-3: 2015 are the refrigerating chamber 308L, the freezing chamber 180L, and so on.
It is a vegetable room 114L.

The refrigerating temperature zone chamber 7 is basically a storage chamber in which the inside of the refrigerator is set to a freezing temperature zone (less than 0 ° C.), for example, about -18 ° C on average, and the refrigerating chamber 2 and the vegetable compartment have a refrigerating temperature zone inside. (0 ° C or higher), for example, the refrigerating room 2 is a storage room having an average temperature of about 4 ° C, and the vegetable room is a storage room having an average temperature of about 7 ° C.

The door 2a is provided with an operation unit 26 for operating the temperature setting in the refrigerator. Door hinges (not shown) are provided at the upper and lower parts of the refrigerator compartment 2 to fix the refrigerator 1 and the doors 2a and 2b, and the upper door hinges are covered with the door hinge cover 16.

As shown in FIG. 2, the outside and inside of the refrigerator 1 are separated by a box body 10 formed by filling a foam insulating material (for example, urethane foam) between the outer box 10a and the inner box 10b. There is. In addition to the foam heat insulating material, a plurality of vacuum heat insulating materials 36 are mounted on the box body 10 between the outer box 10a made of steel plate and the inner box 10b made of synthetic resin. The refrigerating room 2, the upper freezing room 4, and the ice making room 3 are separated by a heat insulating partition wall 28, and similarly, the lower freezing room 5 and the vegetable room 6 are separated by a heat insulating partition wall 29. Further, on the front side of each storage chamber of the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5, a heat insulating partition wall is provided to prevent the flow of air inside and outside the refrigerator through the gaps between the doors 3a, 4a, and 5a. 30 is provided.

A plurality of door pockets 33a, 33b, 33c and a plurality of shelves 34a, 34b, 34c, 34d are provided inside the doors 2a, 2b of the refrigerating chamber 2, and are partitioned into a plurality of storage spaces. In the freezing temperature zone room 7 and the vegetable room 6, an ice making room container (not shown), an upper freezing room container 4b, a lower freezing room container 5b, and a vegetable room container, which are drawn out integrally with the doors 3a, 4a, 5a, and 6a, respectively. It is equipped with 6b. The vegetable compartment container 6b is divided into upper and lower tiers, and is provided with a bottle storage space 6c in front of the lower tier for storing beverage bottles. The height dimension of the bottle storage space 6c is secured to be 305 mm or more so that 1.5 L or 2 L beverage bottles can be stored upright (315 mm in this embodiment). In addition, the fact that bottles for beverages can be stored is made known to users through catalogs, instruction manuals, texts such as advertising media, figures, photographs, and videos.

Above the heat insulating partition wall 28, a chilled room 35 that can be set lower than the temperature zone of the refrigerating room 2 is provided. In the chilled room 35, the user can select the set temperature via the operation unit 26. For example, by controlling the refrigerating evaporator 14a and the refrigerating fan 9a, which will be described later, and by using a heater (not shown) provided in the heat insulating partition wall 28, the refrigerating temperature range is set to, for example, about 0 to 3 ° C. and the freezing temperature range. For example, it is possible to switch to a mode of about -3 to 0 ° C.

A refrigerating evaporator chamber 8a is provided substantially behind the refrigerating chamber 2, and a refrigerating evaporator 14a (first evaporator) is housed in the refrigerating evaporator chamber 8a. A refrigerating fan 9a is provided above the refrigerating evaporator 14a. Further, a refrigerating chamber air passage 11 is provided at substantially the center of the back of the refrigerating chamber 2 in the width direction, and a refrigerating chamber discharge port 11a for blowing cold air to the refrigerating chamber 2 is provided above the refrigerating chamber air passage 11. .. Refrigerating chamber return ports 15a and 15b (see FIG. 3) for returning air sent to the refrigerating chamber 2 are provided in front of the lower part and upper right side of the refrigerating evaporator chamber 8a. The air that has become cold due to heat exchange with the refrigerating evaporator 14a is blown to the refrigerating chamber 2 through the refrigerating chamber air passage 11 and the refrigerating chamber discharge port 11a by driving the refrigerating fan 9a. 2 Cool the inside. The air sent to the refrigerating chamber 2 returns to the refrigerating evaporator chamber 8a from the refrigerating chamber return ports 15a and 15b (see FIG. 3) constituting the first return path.

A freezing evaporator chamber 8b is provided substantially behind the freezing temperature zone chamber 7, and a freezing evaporator 14b (second evaporator) is housed in the freezing evaporator chamber 8b. A freezing fan 9b is provided above the freezing evaporator 14b. Further, in the back of the freezing temperature zone chamber 7, there is a freezing chamber air passage 12
The freezing chamber air passage 12 in front of the freezing fan 9b is provided with a plurality of freezing chamber discharge ports 12a. A freezing chamber return port 17 (see FIGS. 2 and 3) for returning air sent to the freezing temperature zone chamber 7 is provided in front of the lower part of the freezing chamber evaporator chamber 8b.

The vegetable chamber air passage 13 (first series of passages), which serves as an air passage to the vegetable chamber 6, is branched from the lower right of the freezing chamber air passage 12 and passes through the heat insulating partition wall 29. The vegetable compartment discharge port 13a, which is the outlet of the vegetable compartment air passage 13, is provided so as to substantially coincide with the height of the lower surface of the heat insulating partition wall 29 on the upper right of the back of the vegetable chamber 6 and opens downward. The vegetable compartment air passage 13 is provided with a vegetable compartment damper 19 which is a cooling control means for the vegetable compartment 6 (see FIG. 3). A vegetable chamber return inlet 18a is provided in front of the lower left of the heat insulating partition wall 29 between the vegetable chamber 6 and the freezing temperature zone chamber 7, and the vegetable chamber return air passage 18 (No. 1) passing through the heat insulating partition wall 29. A flow path leading to the return outlet 18b of the vegetable chamber provided in front of the lower part of the freezing evaporator chamber 8b is formed via the double communication path).

The air that has become cold due to heat exchange with the freezing evaporator 14b is blown to the freezing temperature zone chamber 7 through the freezing chamber air passage 12 and the freezing chamber discharge port 12a by driving the freezing fan 9b. The inside of the freezing temperature zone chamber 7 is cooled. The air sent to the freezing temperature zone chamber 7 returns to the freezing evaporator chamber 8b from the freezing chamber return port 17 constituting the second return path. When the vegetable compartment damper 19 is in the open state, a part of the cold air flowing into the freezing chamber air passage 12 flows through the vegetable chamber air passage 13 and reaches the vegetable chamber 6 through the vegetable chamber discharge port 13a, and the vegetables Cool the inside of the chamber 6. The air sent to the vegetable chamber 6 enters the vegetable chamber return air passage 18 from the vegetable chamber return inlet 18a constituting the third return path, and returns to the freezing evaporator chamber 8b from the vegetable chamber return outlet 18b.

In the refrigerator of this embodiment, the refrigerating fan 9a is a centrifugal fan (rearward fan) having a blade diameter of 100 mm, and the refrigerating fan 9b is an axial flow fan (propeller fan) having a blade diameter of 110 mm. The rotation speed of the refrigerating chamber fan during normal cooling operation is 1000 min ^-1 or more, and the air volume of the air cooling the refrigerating chamber 2 is 0.3 m ³ / min or more. The rotation speed of the freezer chamber fan 9b is about 1300 min ^-1 , and when the vegetable chamber damper 19 is open, the air volume of the air cooling the freezing temperature zone chamber 7 is about 0.6 m ³ / min, and the vegetable chamber is about 0.6 m 3 / min. The air volume of the air cooling 6 is about 0.1 m ³ / min. The centrifugal fan has the property of turning the air sucked in from the axial direction by 90 degrees and blowing it out in the radial direction. On the other hand, the axial fan has the characteristic of blowing out the air sucked from the axial direction in the axial direction. Therefore, the centrifugal fan is excellent in mountability in the air passage that diverts the flow sucked in the axial direction by 90 degrees, and the axial flow fan is excellent in the mountability in the air passage that blows out the flow sucked in the axial direction in the axial direction. Therefore, as the refrigerating fan 9a, the air sucked from the front is turned 90 degrees and blown out to the upper refrigerating chamber air passage 11. Therefore, a rearward fan, which is a centrifugal fan, is adopted as the refrigerating fan 9b. Is a refrigerator with high space efficiency by adopting a propeller fan, which is an axial flow fan, in order to blow out the air sucked from the rear to the air passage 12 in the freezer compartment in the front.

The refrigerating room 2, the freezing temperature zone room 7, and the vegetable room 6 are provided with a refrigerating room temperature sensor 41, a freezing room temperature sensor 42, and a vegetable room temperature sensor 43, respectively. 7. The temperature of the vegetable compartment 6 is detected. Further, a refrigerating evaporator temperature sensor 40a is provided above the refrigerating evaporator 14a, and a refrigerating evaporator temperature sensor 40b is provided above the refrigerating evaporator 14b, and the refrigerating evaporator 14a and the refrigerating evaporator 14b are provided. The temperature of is detected. Further, inside the door hinge cover 16 on the ceiling of the refrigerator 1, an outside air temperature / humidity sensor 37 for detecting the temperature and humidity of the outside air (outside air) is provided in the doors 2a, 2b, 3a, 4a, 5a, 6a. Is equipped with a door sensor (not shown) that detects the open / closed state.

As shown in FIGS. 2 and 3, a defrost heater 21 for heating the freezing evaporator 14b is provided in the lower part of the freezing evaporator chamber 8b. The defrost heater 21 is, for example, an electric heater of 50 W to 200 W, and in this embodiment, a radiant heater of 150 W is provided. Freezing evaporator 14b
The defrosted water (melted water) generated at the time of defrosting flows down to the trough 23b provided in the lower part of the refrigerating evaporator chamber 8b, and is behind the refrigerator 1 (rear surface) via the drain port 22b and the refrigerating drain pipe 27b. Side) It reaches the machine chamber 39 provided in the lower part, and is discharged to the evaporation tray 32 in the upper part of the compressor 24 installed in the machine room 39.

The method for defrosting the refrigerating evaporator 14a will be described later, but the defrosting water generated during the defrosting of the refrigerating evaporator 14a flows down to the trough 23a provided in the lower part of the refrigerating evaporator chamber 8a. It is discharged to the evaporator 32 provided in the upper part of the compressor 24 via the drain port 22a and the refrigerating drain pipe 27a.

In the machine room 39, along with the compressor 24 and the evaporating dish 32 described above, a fin tube type heat exchanger, an outside radiator 50a, and an outside fan 26 are provided. By driving the outside fan 26, air flows through the compressor 24 and the outside radiator 50a evaporating dish 32, promoting heat dissipation from the compressor 24 and the outside radiator 50a, improving energy saving performance and making the evaporating dish 32. By ventilating, the evaporation of the defrosted water accumulated in the evaporating dish 32 is promoted, the overflow is suppressed, and the reliability is improved.

As shown in FIG. 3, the gutter 23a is provided with a gutter heater 101 that melts the defrosted water frozen in the gutter 23a. Further, the drainage pipe 27a for refrigeration is provided with a drainage pipe upper heater 102 and a drainage pipe lower heater 103. The gutter heater 101, the drain pipe upper heater 102, and the drain pipe lower heater 103 are all heaters having a lower capacity than the defrost heater 21, and in this embodiment, the gutter heater 101 is 6 W and the drain pipe upper heater 102 is used. 3W, the drainage pipe lower heater 103 is 1W.

Here, when the refrigerating fan 9a is driven, the return air from the refrigerating chamber 2 flows downward toward the gutter 23a through the refrigerating chamber return port 15b provided in the upper right of the refrigerating evaporator chamber 8a, and the gutter is used. 23a is heated to raise the temperature. As a result, the effect of reducing the heating amount of the gutter heater 101 that melts the frozen defrost water in the gutter 23a can be obtained, and the energy saving performance can be improved.

Further, the lower part of the drain pipe 27a is closer to the outer box 10a than the freezing temperature zone chamber 7 and the freezing evaporator chamber 8b. As a result, the amount of heat of the drainage pipe lower heater 103 that melts the frozen defrosted water in the drainage pipe 27a can be reduced, and the energy saving performance is improved.

On the ceiling of the refrigerator 1 (see FIG. 2), a control board 31 on which a CPU, a memory such as a ROM or RAM, an interface circuit, etc., which are a part of the control device, is arranged is arranged. The control board 31 is connected to the refrigerating room temperature sensor 41, the freezing room temperature sensor 42, the vegetable room temperature sensor 43, the evaporator temperature sensors 40a, 40b, etc., and the CPU described above sets these output values and the operation unit 26. , ON / OFF and rotation speed control of compressor 24, refrigerating fan 9a, refrigerating fan 9b, defrost heater 21, gutter heater 101, drain pipe upper heater, based on the program recorded in advance in the above-mentioned ROM. It controls 102, the drain pipe lower heater 103, and the three-way valve 52, which will be described later.

FIG. 4 is a refrigerating cycle (refrigerant flow path) of the refrigerator according to the first embodiment. In the refrigerator 1 of the present embodiment, the compressor 24, the outside radiator 50a for radiating the refrigerant, the wall surface heat radiating pipe 50b, and the dew condensation suppressing pipe 50c for suppressing dew condensation on the front edges of the heat insulating partition walls 28, 29, 30. (The outside radiator 50a, the outside radiator 50b, and the dew condensation suppressing pipe 50c are called heat dissipation means), the three-way valve 52 which is a refrigerant flow control means, the refrigerator tube 53a which is a decompression means for reducing the pressure of the refrigerant, and for freezing. It is provided with a capillary tube 53b, a refrigerating evaporator 14a that absorbs heat in the refrigerator by exchanging heat between the refrigerant and the air in the refrigerator, and a refrigerating evaporator 14b. Further, a dryer 51 for removing water during the refrigeration cycle is provided upstream of the three-way valve 52, and downstream of the refrigerating evaporator 14a.
Downstream of the freezing evaporator 14b, gas-liquid separators 54a and 54b are provided, respectively, to prevent the liquid refrigerant from flowing into the compressor 24. Further, a check valve 56 is provided downstream of the gas-liquid separator 54b. A refrigeration cycle is configured by connecting these components with a refrigerant pipe. The refrigerator of this embodiment uses isobutane, which is a flammable refrigerant, as a refrigerant, and the amount of the refrigerant enclosed is 88 g.

The three-way valve 52 includes an outlet 52a and an outlet 52b, with the outlet 52a open and the outlet 52b closed, and a state 1 (refrigerating mode) in which the refrigerant flows to the refrigerating capillary tube 53a side. With the outlet 52a closed and the outlet 52b open, the refrigerant flows to the refrigerating capillary tube 53b side (freezing mode), and both the outlets 52a and 52b are closed 3 (all). It is a refrigerant flow control valve equipped with a closed mode).

When the three-way valve 52 is controlled to the state 1 (refrigerating mode), the refrigerant discharged from the compressor 24 flows through the outside heat sink 50a, the outside heat sink 50b, and the dew condensation suppression pipe 50c to dissipate heat, and the dryer 51. It reaches the three-way valve 52 via. Since the three-way valve 52 is in the state 1 (the outflow port 52a is in the open state and the outflow port 52b is in the closed state), the refrigerant subsequently flows through the refrigerating capillary tube 53a and is depressurized to reach the refrigerating evaporator 14a. It exchanges heat with the return air of the refrigerator compartment 2. The refrigerant leaving the refrigerating evaporator 14a passes through the gas-liquid separator 54a, flows through the contact portion 57a with the capillary tube 53a, exchanges heat with the refrigerant flowing in the capillary tube 53a, and then returns to the compressor 24.

When the three-way valve 52 is controlled to the state 2 (refrigeration mode), the refrigerant discharged from the compressor 24 flows through the outside radiator 50a, the outside radiator 50b, and the dew condensation suppression pipe 50c to dissipate heat, and the dryer 51. It reaches the three-way valve 52 via. Since the three-way valve 52 is in the state 2 (the outflow port 52a is in the closed state and the outflow port 52b is in the open state), the refrigerant subsequently flows through the refrigerating capillary tube 53b and is depressurized to lower the temperature, and the refrigerating evaporator At 14b, heat is exchanged with the return air of the freezing temperature zone chamber 7 and the return air of the vegetable chamber 6 (when the vegetable chamber damper 19 is in the open state). The refrigerant leaving the refrigerating evaporator 14b passes through the gas-liquid separator 54b, flows through the contact portion 57b with the capillary tube 53b, exchanges heat with the refrigerant flowing in the capillary tube 53b, and then returns to the compressor 24.

When the three-way valve 52 is controlled to the state 3 (fully closed mode), when the compressor 24 is driven, the refrigerant is not supplied from the refrigerating capillary tube 53a and the refrigerating capillary tube 53b, so that the refrigerating evaporator The refrigerant in 14a or the refrigerant in the refrigerating evaporator 14b is recovered on the heat radiating means side (details will be described later).

In the refrigerator of this embodiment, the three-way valve 52 is controlled to the state 1 (refrigerating mode), the compressor 24 is driven, the refrigerating fan 9a is driven, and the refrigerating fan 9b is stopped. "Refrigerating operation", the three-way valve 52 is controlled to state 2 (refrigerating mode), the compressor 24 is in the driving state, the vegetable compartment damper 19 is in the open state, the refrigerating fan 9a is in the driving state or stopped state, and for refrigeration. "Frozen vegetable operation" that cools the refrigerating temperature zone chamber 7 and the vegetable compartment 6 by driving the fan 9b, controls the three-way valve 52 to the state 2 (freezing mode), drives the compressor 24, and the vegetable compartment. "Frozen operation" to cool the refrigerating temperature zone chamber 7 by setting the damper 19 in the closed state, the refrigerating fan 9a in the driving state or the stopped state, and the refrigerating fan 9b in the driving state, and the three-way valve 52 in the state 3 (fully closed). Mode), with the compressor 24 in the driving state, the "refrigerator recovery operation" to recover the refrigerant in the refrigerating evaporator 14a or the refrigerant in the refrigerating evaporator 14b to the heat dissipation means side, the three-way valve 52. As state 3 (fully closed mode), the compressor 24 is stopped, the refrigerating fan 9a is stopped, the refrigerating fan 9b is stopped, and the three-way valve 52 is in state 2 (refrigerating mode) and the compressor. The refrigerating fan is driven so that the refrigerant does not flow to the refrigerating evaporator 14a by controlling the 24 to the driving state or controlling the three-way valve 52 to the state 3 (fully closed mode) and the compressor 24 to the stopped state. As a result, "refrigerator evaporator defrosting operation", which defrosts the refrigerating evaporator 14a while cooling the refrigerating chamber 2 with the frost grown on the surface of the refrigerating evaporator 14a and the cold storage heat of the refrigerator itself, is a three-way valve. When 52 is set to state 3 (fully closed mode), the compressor 24 is stopped, the refrigerating fan 9a is driven or stopped, the refrigerating fan 9b is stopped, and the defrost heater 21 is energized for refrigeration. By appropriately performing each operation of the "refrigerator defrosting operation" for defrosting the evaporator 14b, each storage room in the refrigerator 1 is satisfactorily cooled.

The configuration of the refrigerator according to the present embodiment has been described above. Next, the control of the refrigerator according to the present embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart showing the control of the refrigerator according to the present embodiment, and FIG. 6 is a time chart showing the control of the refrigerator according to the present embodiment.

As shown in FIG. 5, in the refrigerator of this embodiment, when the power is turned on (start), the three-way valve 52 is in state 1 (refrigerating mode), the compressor 24 is driven at low speed (800min ^-1 ), and the refrigerating fan 9a is operated. The drive, the refrigerating fan 9b is stopped, the vegetable compartment damper 19 is closed, and the refrigerating operation is started (step S101). Subsequently, it is determined whether or not the refrigerating operation end condition is satisfied (step S102), and the refrigerating operation is continued until step S102 is satisfied. In the refrigerator of this embodiment, step S102 is established when the refrigerating room temperature TR detected by the refrigerating room temperature sensor 41 is _equal to or less than the refrigerating operation end temperature TR _Roff ( _TR ≤ T _Roff ). When step S102 is established (Yes), the compressor 24 is driven at low speed (continued), the three-way valve 52 is set to state 3 (fully closed mode), and the refrigerant in the refrigerating evaporator 14a is recovered to the heat dissipation means side. The operation is performed (step S103). At this time, the refrigerating fan 9a continues to be driven and cools the refrigerating chamber 2 even during the refrigerant recovery operation. Refrigerant recovery operation is carried out for a predetermined time (2 minutes in the refrigerator of this embodiment) (step S104), then the three-way valve is in state 2 (freezing mode), the compressor 24 is driven at high speed (1400min-1), and the refrigerating fan. 9a is driven (continued), the refrigerating fan 9b is driven, the vegetable compartment damper 19 is opened, and frozen vegetable operation and refrigerating evaporator defrosting operation are performed (step S105).

Next, it is determined whether or not the condition for closing the vegetable compartment damper is satisfied (step S106). In the refrigerator of this embodiment, step S106 is established when the vegetable room temperature _TV detected by the vegetable room temperature sensor 43 is equal to or less than the vegetable room damper closing temperature T _Voff ( _TV ≤ T _Voff ). If step S106 is not satisfied (No), it is subsequently determined whether or not the refrigerating evaporator defrosting operation end condition is satisfied (step S107). When step S106 is established (Yes), the vegetable compartment damper 19 is closed (step S201), and after shifting to the freezing operation, the determination in step S107 is performed. In the refrigerator of this embodiment, step S107 is performed when the refrigerating evaporator temperature T _Revp detected by the refrigerating evaporator temperature sensor 40a is equal to or higher than the refrigerating evaporator defrosting operation end temperature T _RDoff (T _Revp ≧ TR _Doff ). To establish. If step S107 is not satisfied (No), it is subsequently determined whether or not the refrigerating operation end condition is satisfied (step S108). When step S107 is established (Yes), the refrigerating fan 9a is stopped (step S202), and after the refrigerating evaporator defrosting operation is completed, the determination in step S108 is started. In the refrigerator of this embodiment, step S108 is established when the vegetable compartment damper 19 is closed and the freezing chamber temperature _TF is equal to or less than the freezing operation end temperature _TFoff ( _TF ≧ _TFoff ). If step S108 is not established (No), the process returns to the determination in step S106. When step S108 is established (Yes), the compressor 24 is driven at high speed (continued), the three-way valve 52 is set to state 3 (fully closed mode), and the refrigerant in the refrigerating evaporator 14b is recovered to the heat dissipation means side. The operation is performed (step S109). At this time, the refrigerating fan 9b continues to be driven, and the refrigerating temperature zone chamber 7 is cooled even during the refrigerant recovery operation.

The refrigerant recovery operation is carried out for a predetermined time (1.5 minutes in the refrigerator of this embodiment) (step S110), and then it is determined whether or not the refrigerating operation start condition is satisfied (step S111).
.. In the refrigerator of this embodiment, step _S111 is established when the refrigerating chamber temperature _TR is equal to or higher than the refrigerating operation start temperature _TR ( _TR ≧ TR on). When step S111 is established (Yes), the process returns to step S101 and the refrigerating operation is performed. If step S111 is not satisfied (No), the compressor 24 is stopped, the freezing fan 9b is stopped (step S112), and the process proceeds to the determination of the refrigerating evaporator defrosting operation end condition (step S113). The refrigerating evaporator defrosting operation end condition is satisfied when the refrigerating evaporator temperature T _Revp is equal to or higher than the refrigerating evaporator defrosting operation end temperature _{TRDoff (T Revp ≧ TRDoff} ) (the same conditions as in step S107). ). If step S113 is not satisfied (No), it is subsequently determined whether or not the refrigerating operation start condition is satisfied (step S114). When step S113 is established (Yes), the refrigerating fan 9a is stopped (step S203), and the process proceeds to the determination in step S114 after the refrigerating evaporator defrosting operation is completed. Step _S114 is established when the refrigerating chamber temperature _TR is equal to or higher than the refrigerating operation start temperature _TR ( _TR ≧ TR on) (the same conditions as in step S111). If step S114 is not established (No), the determination in step S113 is returned, and if step S114 is established, the process returns to step S101 and the refrigerating operation is performed.

FIG. 6 is a time chart showing an operating state when the refrigerator according to this embodiment is installed at 32 ° C. and a relative humidity of 70%. Time t ₀ is the time when the refrigerating operation for cooling the refrigerating chamber 2 is started (step S101 in FIG. 5). In the refrigerating operation, the three-way valve 52 is controlled to the state 1 (refrigerating mode), the compressor 24 is driven at a low speed (800min ^-1 ) to flow the refrigerant through the refrigerating evaporator 14a, and the refrigerating evaporator 14a is cooled to a low temperature. do. By operating the refrigerating fan 9a in this state, the refrigerating chamber 2 is cooled by the air that has passed through the refrigerating evaporator 14a and has become cold. Here, the temperature of the refrigerating evaporator 14a during the refrigerating operation is higher than the temperature of the refrigerating evaporator 14b during the refrigerating operation, which will be described later. Generally, the higher the temperature of the evaporator (evaporation temperature), the higher the coefficient of performance of the refrigeration cycle (the ratio of the amount of heat absorbed to the input of the compressor 24), and the higher the energy saving performance. In the refrigerating temperature zone chamber 7, it is necessary to lower the temperature of the refrigerating evaporator 14b in order to maintain the refrigerating temperature, but since the refrigerating chamber 2 may be maintained at the refrigerating temperature, the temperature of the refrigerating evaporator 14a may be changed. It has been enhanced to improve energy saving performance. In the refrigerator 1 of the present embodiment, the rotation speed of the compressor 24 during the refrigerating operation is set to a lower speed (800 min ^-1 ) than during the refrigerating operation so that the temperature of the refrigerating evaporator 14a during the refrigerating operation becomes high. There is.

The refrigerating chamber 2 is cooled by the refrigerating operation, _{and the refrigerating chamber temperature TR detected by the refrigerating chamber temperature sensor 42 at time t1 drops to the refrigerating operation end temperature TRoff , so} that the refrigerating operation is switched to the refrigerant recovery operation ( Step S102 in FIG. 5). In the refrigerant recovery operation, the three-way valve 52 is controlled to the state 3 (fully closed mode), the compressor 24 is in the low speed drive state (800 min ^-1 ), and the refrigerant in the refrigerating evaporator 14a is recovered for 2 minutes (FIG. 5). Steps S103, S104). As a result, it is possible to suppress a decrease in cooling efficiency due to a shortage of refrigerant in the next frozen vegetable operation and the freezing operation. At this time, by driving the refrigerating fan 9a, the residual refrigerant in the refrigerating evaporator 14a is utilized for cooling the refrigerating chamber 2, and the refrigerating evaporator 14a is heated by heating with air in the refrigerating chamber 2. Pressure drop is alleviated. As a result, the increase in the specific volume of the suction refrigerant of the compressor 24 is suppressed, a large amount of refrigerant can be recovered in a relatively short time, and the cooling efficiency can be improved.

When the refrigerant recovery operation is completed (time t ₂ ), the operation is subsequently switched to the frozen vegetable operation for cooling the freezing temperature zone chamber 7 (step S105 in FIG. 5). In frozen vegetable operation, the three-way valve 52 is controlled to the state 2 (freezing mode), the compressor 24 is set to the high-speed driving state (1400min ^-1 ), the refrigerant flows through the refrigerating evaporator 14b, and the refrigerating evaporator 14b is cooled at a low temperature. To. In this state, the vegetable compartment damper 19 is opened and the refrigerating fan 9b is operated to cool the refrigerating temperature zone chamber 7 and the vegetable compartment 6 with the air that has passed through the refrigerating evaporator 14b and has become cold. At this time, by continuing the operation of the refrigerating fan 9a, the refrigerating evaporator defrosting operation is carried out. As a result, the temperature of the refrigerating evaporator 14a rises, and the temperature rise of the refrigerating chamber 2 is alleviated by the cooling effect of frost and the cold storage heat of the refrigerating evaporator.

When the vegetable room temperature _{TV detected by the vegetable room temperature sensor 43 at time t3 reaches the vegetable room damper closing temperature T Voff , the} vegetable room damper 19 is closed (steps S106 and S201 in FIG. 5), and the freezing operation is performed. Has moved to.

Subsequently, at time t4, the temperature T _Revp of the refrigerating evaporator 14a detected by the refrigerating evaporator temperature sensor 40a _reaches the refrigerating evaporator defrosting operation end temperature _TRDoff , so that the refrigerating fan 9a is stopped. , The refrigerating evaporator defrosting operation has been completed (steps S107 and S202 in FIG. 5).

Since the freezing room temperature T _F detected by the freezing room temperature sensor 41 reaches the freezing operation end temperature T _Refoff at time _t5 and the vegetable room damper 19 is closed, the freezing operation is completed (FIG. 5). Step S108), the three-way valve 52 is controlled to the state 3 (fully closed mode), the compressor 24 is in the high-speed drive state (1400min ^-1 ), and the refrigerant in the freezing evaporator 14b is recovered for 1.5 minutes (1400min -1). Steps S109 and S110 in FIG. 5). As a result, it is possible to suppress a decrease in cooling efficiency due to a shortage of refrigerant in the next refrigeration operation. At this time, by driving the refrigerating fan 9b, the residual refrigerant in the refrigerating evaporator 14b is utilized for cooling the refrigerating temperature zone chamber 7, and the refrigerating temperature zone chamber 7 is heated by air for freezing. The pressure drop in the evaporator 14b is alleviated. As a result, the increase in the specific volume of the suction refrigerant of the compressor 24 is suppressed, a large amount of refrigerant can be recovered in a relatively short time, and the cooling efficiency can be improved.

Since the refrigerating chamber temperature T _R has reached the refrigerating operation start temperature T _Ron or higher at the time t ₆ when the refrigerant recovery operation is completed, the refrigerating operation start condition is satisfied (step S111 in FIG. 7), and the refrigerating operation is performed again. It is started (step S101 in FIG. 7).

The configuration of the refrigerator and the control method of the present embodiment have been described above. Next, the effects of the refrigerator of the present embodiment will be described.

The refrigerator of this embodiment is provided with a refrigerating chamber 2 (first refrigerating temperature zone chamber), a refrigerating temperature zone chamber 7, and a vegetable compartment 6 (second refrigerating temperature zone chamber) from above, and evaporates for refrigeration on the back of the refrigerating chamber 2. A vessel 14a (first evaporator) and a refrigerating fan 9a, a refrigerating evaporator 14b (second evaporator) and a refrigerating fan 9b are provided at the back of the freezer chamber, and air exchanged with the refrigerating evaporator 14a is provided. The refrigerating fan 9a drives the air to cool the refrigerating chamber 2, and the air exchanged with the refrigerating evaporator 14b is blown to cool the refrigerating temperature zone chamber 7 and the vegetable compartment 6 by driving the refrigerating fan 9b. are doing. As a result, it is possible to provide a refrigerator that can exhibit high energy-saving performance and has high space efficiency. The reason will be described below with reference to FIGS. 7 and 8.

FIG. 7 is a Moriel diagram showing the relationship between the temperature of the evaporator according to the refrigerator of this embodiment and the coefficient of performance, and FIG. 8 is a schematic diagram of the refrigerator showing a comparative example.

First, the refrigerant state of the refrigerating cycle in the refrigerator of this embodiment will be described with reference to FIGS. 4 and 7. In the refrigerator of this embodiment, in the refrigerating operation, the low-pressure refrigerant (state R1) at the inlet of the compressor 24 is compressed by the compressor 24 and discharged in the high-pressure state R2. After that, the specific enthalpy is lowered by the heat radiation from the housing of the compressor 24 and the heat radiation in the heat dissipation means of the heat dissipation device 50a, the heat dissipation device 50b, and the dew condensation suppression pipe 50c, and the state R3 (liquid state) is reached. In the refrigerating operation, since the three-way valve is in the state 1 (refrigerating mode), it subsequently flows through the refrigerating capillary tube 53a to be depressurized, becomes a low-temperature low-pressure state R4, and flows into the refrigerating evaporator 14a. In the refrigerating evaporator 14a, heat is exchanged with the return air from the refrigerating chamber 2, the specific enthalpy rises, and the state R5 (gas state) is reached at the outlet of the refrigerating evaporator 14a. The refrigerant flowing out of the refrigerating evaporator 14a exchanges heat with the refrigerant flowing through the refrigerating capillary tube 53a, so that the specific enthalpy rises and reaches the inlet (state R1) of the compressor 24. The heat absorption of the refrigerating evaporator 14a in the refrigerating operation is Q1, the compressor power in the refrigerating operation is W1, and the refrigerating cycle coefficient of performance COP1 in the refrigerating operation is COP1 = Q1 / W1.

Further, in the refrigerating operation or the frozen vegetable operation for cooling the refrigerating temperature zone chamber 7, the low-pressure refrigerant (state F1) at the inlet of the compressor 24 is compressed by the compressor 24 and discharged in the high-pressure state F2. After that, the specific enthalpy is lowered by the heat radiation from the housing of the compressor 24 and the heat radiation in the heat dissipation means of the heat dissipation device 50a, the heat dissipation device 50b, and the dew condensation suppressing pipe 50c, and the state becomes F3 (liquid state). In the freezing operation or the frozen vegetable operation, the three-way valve is in the state 2 (freezing mode). Inflow to. In the refrigerating evaporator 14b, the specific enthalpy rises by exchanging heat with the return air from the refrigerating temperature zone chamber 7 or the vegetable chamber 6, and the state F5 (gas state) is reached at the outlet of the refrigerating evaporator 14b. The refrigerant flowing out of the refrigerating evaporator 14b exchanges heat with the refrigerant flowing through the refrigerating capillary tube 53b, so that the specific enthalpy rises and reaches the inlet (state F1) of the compressor 24. Assuming that the heat absorption of the freezing evaporator 14b in the freezing operation or frozen vegetable operation is Q2 and the compressor power in the freezing operation or frozen vegetable operation is W2, the freezing cycle coefficient of performance COP2 during the freezing operation is COP2 = Q2 / W2. Become.

At this time, the temperature (evaporation temperature) of the refrigerating evaporator 14a in the refrigerating operation for cooling the refrigerating chamber 2 and the temperature (evaporation temperature) of the refrigerating evaporator 14b in the refrigerating operation or the frozen vegetable operation for cooling the refrigerating temperature zone chamber 7. ), The temperature of the refrigerating evaporator 14a in the refrigerating operation is increased. This evaporates for refrigeration by separating the circulation path of air flowing through the refrigerating chamber 2 maintained in the refrigerating temperature zone and the circulation path of air flowing through the refrigerating temperature zone chamber 7 maintained in the low-temperature freezing temperature zone. This is realized by preventing the air in the low-temperature refrigerating temperature zone chamber 7 from returning to the vessel 14a. By raising the temperature of the refrigerating evaporator 14a in this way, the coefficient of performance of the refrigerating cycle is improved, so that the refrigerator has high energy-saving performance.

8 (a) and 8 (b) are comparative examples of refrigerators, all of which are a refrigerating room 2 (first refrigerating temperature zone room), a freezing temperature zone room 7, and a vegetable room 6 (second refrigerating temperature zone room) from above. The circulation path of air flowing through the refrigerating chamber 2 maintained in the refrigerating temperature zone and the circulation path of air flowing through the refrigerating temperature zone chamber 7 maintained in the low-temperature freezing temperature zone are separated, and the back of the refrigerating chamber 2 is separated. A refrigerator equipped with a refrigerating evaporator 14a (first evaporator) and a refrigerating fan 9a, and a refrigerating evaporator 14b (second evaporator) and a refrigerating fan 9b at the back of the freezer compartment.

FIG. 8A adopts the configuration of the refrigerator described in Patent Document 1, in which the air exchanged with the refrigerating evaporator 14a is blown by the drive of the refrigerating fan 9a to cool the refrigerating chamber 2. Then, the air that has exchanged heat with the refrigerating evaporator 14b is blown by the driving of the refrigerating fan 9b to cool the refrigerating temperature zone chamber 7. The vegetable compartment 6 is indirectly cooled by the cold air of the freezing temperature zone chamber 7 through the heat insulating partition wall 29. In general, the amount of heat transfer through the partition wall is proportional to the temperature difference, so if it is necessary to increase the amount of heat transfer and increase the cooling capacity of the vegetable compartment 6, it is possible to control the temperature difference to increase. It becomes valid. Therefore, when the outside air temperature is high, when food with a high temperature is stored in the vegetable room, or when food etc. is sandwiched between the vegetable room door and the box body, a gap is created between the vegetable room door and the box body, so that the load on the vegetable room is increased. If it is large and it is necessary to sufficiently increase the cooling capacity, it is necessary to keep the freezing chamber at an excessively low temperature, which causes problems such as deterioration of energy saving performance. It is conceivable to lower the heat insulating performance of the partition wall according to the condition that the load of the vegetable room is large, but in this case, when the outside air temperature is low and the load is small, the vegetable room 6 is excessively cooled. Since vegetables freeze and other problems occur, heating (temperature compensation) with an electric heater is required, which reduces energy-saving performance.

FIG. 8B adopts the configuration of the refrigerator described in Patent Document 2, in which the air exchanged with the refrigerating evaporator 14a is blown by the drive of the refrigerating fan 9a to blow the refrigerating chamber 2 and the vegetables. The chamber 6 is cooled, and the air that has exchanged heat with the refrigerating evaporator 14b is blown by the drive of the refrigerating fan 9b to cool the refrigerating temperature zone chamber 7. In this configuration, the vegetable chamber air passage 13 that blows the air sent out by the refrigerating fan 9a to the vegetable chamber 6 and the vegetable chamber return air passage 18 that returns the air that has cooled the vegetable chamber 6 to the refrigerator chamber 8a for the refrigerating chamber. Passes through the low temperature freezer chamber 2 or the refrigerating evaporator chamber 8b. Since the temperature of the air flowing through the vegetable room air passage 13 and the vegetable room return air passage 18 is relatively high, the absolute humidity tends to be high, and frost tends to grow in the vegetable room air passage 13 and the vegetable room return air passage 18. .. In order to prevent the air passage from being blocked by frost, a heat insulating wall (insulation member) is provided between the vegetable room air passage 13 and the vegetable room return air passage 18 and the freezing room 2 or the freezing evaporator room 8b to blow air into the vegetable room. It is necessary to prevent the temperature of the inner surface of the passage 13 and the vegetable chamber return air passage 18 from dropping too much. Therefore, since the space of the air passage and the space of the heat insulating wall (heat insulating member) are required, the freezing chamber 2 or the freezing evaporator chamber 8b is reduced. When the freezing chamber 2 is reduced, the effective internal volume is reduced and the space efficiency is deteriorated. When the freezing evaporator chamber 8b is reduced, the stored freezing evaporator 14b is reduced and the heat exchange performance is deteriorated. Causes deterioration of energy saving performance.

On the other hand, in the refrigerator of this embodiment, as shown in FIG. 3, the air exchanged with the refrigerating evaporator 14a is blown by the driving of the refrigerating fan 9a to cool the refrigerating chamber 2 and the refrigerating evaporator 14b. The air that has exchanged heat with the refrigerator is blown by the drive of the refrigerating fan 9b to cool the refrigerating temperature zone chamber 7 and the vegetable compartment 6. As a result, the cooling capacity of the refrigerating chamber 2 can be controlled by the refrigerating fan 9a, and the refrigerating temperature zone chamber 7 and the vegetable compartment 6 can be controlled by the refrigerating fan 9b. The room 7 and the vegetable room 6 can be efficiently cooled, and the refrigerator has high energy-saving performance. Further, since the air flowing through the storage chamber in the refrigerating temperature zone does not pass through the freezing chamber 2 or the freezing evaporator chamber 8b, the space efficiency is improved. That is, the refrigerator has high energy-saving performance and high space efficiency.

The refrigerator of this embodiment is provided so that the vegetable compartment air passage 13 passes through the heat insulating partition wall 29. As a result, any one of the freezing evaporator chamber 8b, the freezing chamber air passage 12, the freezing temperature zone chamber 7, or the freezing chamber return port 17 is communicated with the vegetable chamber 6. As a result, the length of the air passage can be shortened, the space efficiency can be improved, and the air passage resistance can be suppressed low, so that the refrigerator has high air efficiency and excellent energy saving performance.

The refrigerator of this embodiment is provided so that the vegetable compartment return air passage 18 flows through the heat insulating partition wall 29. This eliminates the need to use a separate heat insulating member as a heat insulating means for suppressing the influence of the return cold air having a relatively high temperature from the vegetable chamber 6 in the refrigerated temperature zone on the freezing temperature zone chamber 7. It will be a space-efficient refrigerator.
In the refrigerator of this embodiment, the height position of the opening (vegetable chamber discharge port 13a) at the lower end of the vegetable compartment air passage 13 is substantially matched with the height position of the heat insulating partition wall 29, and the cooling air is cooled from above the vegetable chamber 6. (See Fig. 3). When the low-temperature cold air that has exchanged heat with the freezing evaporator 14b is guided to the inside of the vegetable chamber 6 (for example, the back surface), the surface of the air passage on the vegetable chamber 6 side becomes low temperature and dew condensation is likely to occur. It is necessary to provide a heat insulating wall (heat insulating member) between the roads. In addition, since low-temperature air has a high density and has the property of flowing downward, supplying low-temperature air to the upper space is effective in improving cooling efficiency. In the refrigerator of this embodiment, the height position of the opening (vegetable room discharge port 13a) at the lower end of the vegetable room air passage 13 is substantially matched with the height position of the heat insulating partition wall 29, so that the vegetable room air passage 13 has a height position. The heat insulating wall near the lower end is also used as the heat insulating partition wall 29, and the length of the ventilation path is kept short, so that the heat insulating wall (heat insulating member) and the air passage are provided in the vegetable compartment 6 to suppress the decrease in space efficiency, and the vegetables. By blowing cooling air from above the chamber 6, the cooling efficiency of the vegetable chamber 6 is improved.

The refrigerator of this embodiment is provided with a vegetable room temperature sensor 43 for detecting the temperature of the vegetable room 6, and is provided with a vegetable room damper 19 in the vegetable room air passage 13. As a result, the vegetable compartment damper 19 can be opened and closed to control the ventilation to the vegetable compartment according to the excess or deficiency of cooling of the vegetable compartment, so that the refrigerator has high cooling efficiency and excellent energy saving.

In the refrigerator of this embodiment, the vegetable compartment damper 19 is provided near the lower end of the vegetable compartment air passage 13. For example, when the vegetable room damper 19 is provided near the upper end of the vegetable room air passage 13 (inside the freezing room 6), the air downstream from the vegetable room damper 19 (on the vegetable room 6 side) even when the vegetable room damper 19 is closed. May be cooled by the freezing chamber 6 to a low temperature and form a downward flow. If low-temperature air is supplied to the vegetable compartment 6 even if the vegetable compartment damper 19 is closed in this way, the temperature of the vegetable compartment 6 may drop too much, especially when the load on the vegetable compartment 6 is small. In the refrigerator of the embodiment, by providing the vegetable chamber damper 19 near the lower end of the vegetable chamber air passage 13, low temperature air flows from the vegetable chamber air passage 13 into the vegetable chamber 6 even when the vegetable chamber damper 19 is closed. Since it is possible to prevent the vegetable chamber 6 from becoming too cold, the vegetable compartment 6 can be efficiently cooled.

The refrigerator of this embodiment is provided with a bottle storage space 6c for storing beverage bottles in the vegetable compartment 6 so that the vegetable compartment 6 is supplied with cold air from the low-temperature freezing chamber 6. This makes it possible to efficiently cool the beverage bottle.

A second embodiment of the refrigerator according to the present invention will be described with reference to FIG. The description of the same configuration as that of the first embodiment will be omitted. FIG. 9 is a schematic view showing the configuration of the refrigerator of this embodiment.

As shown in FIG. 9, the refrigerator of this embodiment has storage chambers in the order of refrigerating chamber 2 (first refrigerating temperature zone chamber), refrigerating temperature zone chamber 7, and vegetable chamber 6 (second refrigerating temperature zone chamber) from above. Is forming. A refrigerating evaporator chamber 8a is provided substantially behind the refrigerating chamber 2, and a refrigerating evaporator 14a (first evaporator) is housed in the refrigerating evaporator chamber 8a. A refrigerating fan 9a is provided above the refrigerating evaporator 14a. The air that has become cold due to heat exchange with the refrigerating evaporator 14a is blown to the refrigerating chamber 2 through the refrigerating chamber air passage 11 and the refrigerating chamber discharge port 11a by driving the refrigerating fan 9a. 2 Cool the inside. The air sent to the refrigerating chamber 2 returns to the refrigerating evaporator chamber 8a from the refrigerating chamber return port 15a.

A freezing evaporator chamber 8b is provided substantially behind the freezing temperature zone chamber 7, and a freezing evaporator 14b (second evaporator) is housed in the freezing evaporator chamber 8b. A freezing fan 9b is provided above the freezing evaporator 14b. Further, downstream of the freezing fan 9b, a freezing chamber damper 20 is provided as a means for controlling the amount of air blown to the freezing temperature zone chamber 7. Further, the vegetable chamber air passage 13 serving as an air passage to the vegetable chamber 6 is branched from the freezing chamber air passage 12 and reaches the vegetable chamber discharge port 13a on the upper right of the back of the vegetable chamber. The vegetable compartment air passage 13 is provided with a vegetable compartment damper 19 which is a means for controlling the amount of air blown to the vegetable compartment 6. As described above, the air passage downstream of the freezing fan 9b is branched into a freezing room air passage 12 toward the freezing room damper 20 and a vegetable room air passage 13 toward the vegetable room damper 19. The heat insulating partition wall 29 between the vegetable compartment 6 and the freezing temperature zone chamber 7 is provided with a vegetable compartment return inlet 18a, and air is provided in the lower part of the freezing evaporator chamber 8b via the vegetable compartment return air passage 18. A flow path is formed.

When the freezing chamber damper 20 is in the open state, the air that has become cold due to heat exchange with the freezing evaporator 14b is driven by the freezing fan 9b to open the freezing chamber air passage 12 and the freezing chamber discharge port 12a. The air is blown into the freezing temperature zone chamber 7 through the freezing temperature zone chamber 7 to cool the inside of the freezing temperature zone chamber 7. The air sent to the freezing temperature zone chamber 7 returns to the freezing evaporator chamber 8b from the freezing chamber return port 17. When the vegetable compartment damper 19 is in the open state, a part of the cold air flowing into the freezing chamber air passage 12 flows through the vegetable chamber air passage 13 and is blown to the vegetable chamber 6 through the vegetable chamber discharge port 13a. Cool the inside of the vegetable compartment 6. The air sent to the vegetable compartment 6 enters the vegetable compartment return air passage 18 from the vegetable compartment return inlet 18a, and returns to the freezing evaporator chamber 8b from the vegetable compartment return outlet 18b.

As described above, the refrigerator of this embodiment has a refrigerating room 2 (first refrigerating temperature zone room), a freezing temperature zone room 7, and a vegetable room 6 (second refrigerating temperature zone room) from above. The back of the refrigerating chamber 2 is equipped with a refrigerating evaporator 14a (first evaporator) and a refrigerating fan 9a, and the back of the freezing chamber is provided with a refrigerating evaporator 14b (second evaporator) and a refrigerating fan 9b. When the air exchanged with the refrigerator 14a is blown by the drive of the refrigerating fan 9a to cool the refrigerating chamber 2, and the air exchanged heat with the refrigerating evaporator 14b is opened. Can blow air to the refrigerating temperature zone chamber 7 by driving the refrigerating fan 9b, and when the vegetable compartment damper 19 is in the open state, blow air to the vegetable compartment 6 by driving the refrigerating fan 9b to cool the refrigerator. When both the freezing chamber damper 20 and the vegetable compartment damper 19 are in the open state, air can be blown to both the freezing temperature zone chamber 7 and the vegetable compartment 6 to cool by driving the freezing fan 9b. As a result, for example, because the food having a high temperature is stored only in the freezing temperature zone chamber 7 or the food having a high temperature is stored only in the vegetable chamber 6, the load on either the freezing temperature zone chamber 7 or the vegetable chamber 6 is loaded. When the temperature is high and the other is sufficiently cooled, only the damper provided in the air passage toward the storage room on the side with the higher load of the freezer room damper 20 or the vegetable room damper 19 should be opened for cooling. Can be done. Therefore, it is possible to suppress excessive cooling of the sufficiently cooled storage chamber, so that the refrigerator has high energy-saving performance.

A third embodiment of the refrigerator according to the present invention will be described with reference to FIG. The same configuration as in Example 1 or Example 2 will be omitted. FIG. 8 is a schematic view showing the configuration of the refrigerator of this embodiment.

As shown in FIG. 10, the refrigerator of this embodiment is provided with a freezing evaporator chamber 8b substantially behind the freezing temperature zone chamber 7, and a freezing evaporator is provided in the freezing evaporator chamber 8b. 14b (second evaporator) is stored. A freezing fan 9b is provided above the freezing evaporator 14b. The air that has become cold due to heat exchange with the freezing evaporator 14b is blown to the freezing temperature zone chamber 7 through the freezing chamber air passage 12 and the freezing chamber discharge port 12a by driving the freezing fan 9b. The inside of the freezing temperature zone chamber 7 is cooled. The air sent to the freezing temperature zone chamber 7 returns to the freezing evaporator chamber 8b from the freezing chamber return port 17.

Further, the heat insulating partition wall 29 is provided with an air passage 25 (communication route) in which the freezing temperature zone chamber 7 and the vegetable chamber 6 communicate with each other. In the air passage 25, a vegetable compartment damper 19 which is a cooling control means for the vegetable compartment 6 is provided. When the vegetable compartment damper 19 is in the open state, the low-temperature cold air in the freezing chamber flows into the vegetable compartment 6 through the air passage 25 by convection to cool the vegetable compartment 6. When the vegetable compartment damper 19 is in the closed state, convection through the air passage 25 is suppressed, so that cooling of the vegetable compartment 6 is suppressed.

As described above, the refrigerator of this embodiment is provided with a refrigerating room 2 (first refrigerating temperature zone room), a refrigerating temperature zone room 7, a vegetable room 6 (second refrigerating temperature zone room) from above, and the back of the refrigerating room 2. Is equipped with a refrigerating evaporator 14a (first evaporator) and a refrigerating fan 9a, and a refrigerating evaporator 14b (second evaporator) and a refrigerating fan 9b are provided at the back of the freezer chamber, and heat is exchanged with the refrigerating evaporator 14a. The air is blown to cool the refrigerating chamber 2 by driving the refrigerating fan 9a, and the air that has exchanged heat with the refrigerating evaporator 14b is blown to the refrigerating temperature zone chamber 7 by driving the refrigerating fan 9b to freeze. The temperature zone chamber 7 is cooled, and the vegetable chamber 6 is cooled by convection through the air passage 25 in which the refrigerating temperature zone chamber 7 and the vegetable chamber 6 communicate with each other. The movement of air through the air passage 25 is
Since the main convection (natural convection) is caused by the density difference between the low temperature air in the freezing temperature zone chamber 7 and the high temperature air in the vegetable chamber 6, the load in the vegetable chamber 6 is large and the temperature rises. In that case, the temperature difference (difference in air density) from the freezing temperature zone chamber 7 increases, and an active inflow of cold air occurs. That is, the self-adjusting function according to the load of the vegetable chamber 6 works through the air passage 25, and the cooling capacity in the vegetable chamber 6 can be adjusted without requiring the blowing power to the vegetable chamber. As a result, the refrigerator of this embodiment becomes a refrigerator having excellent energy-saving performance. The air passage 25 is provided in the heat insulating partition wall 29. As a result, a new air passage installation space is not required, and the refrigerator has excellent space efficiency.

Further, the refrigerator of this embodiment is provided with a vegetable compartment damper 19 in the air passage 25. As a result, the air passage 25 can be controlled to be reduced or closed, so that it is possible to prevent the vegetable compartment from being excessively cooled, especially when the load on the vegetable compartment is small, so that the refrigerator has excellent energy-saving performance.

The above is an example showing the embodiment of the present embodiment. The present invention is not limited to the above-mentioned examples, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. In addition, it is possible to add / delete / replace a part of the configuration of the embodiment with another configuration.

1 Refrigerator 2 Refrigerator room (1st refrigerating temperature zone room)
2a, 2b Refrigerator door 3 Ice making room 4 Upper freezing room 5 Lower freezing room Freezing room 3a, 4a, 5a Freezing room door 6 Vegetable room (second refrigerating temperature zone room)
6a Vegetable room door 7 Freezing temperature zone room (general term for 3, 4, 5)
8a Refrigerator evaporator room (first evaporator storage room)
8b Freezing evaporator room (second evaporator storage room)
9a Refrigerator fan (first blower)
9b Freezing fan (second blower)
10 Insulation box body 10a Outer box 10b Inner box 11 Refrigerator room air passage (first air passage)
11a Refrigerator room discharge port 12 Freezing room air passage (second air passage)
12a Freezing room discharge port 13 Vegetable room air passage (third air passage)
13a Vegetable room discharge port 14a Refrigerator evaporator (first evaporator)
14b Freezing evaporator (second evaporator)
15a, b Refrigerator room return port 16 Hing cover 17 Freezer room return port 18 Vegetable room return air passage 18a Vegetable room return port 19 Vegetable room damper 20 Freezer room damper 21 Radiant heater 22a, 22b Drain port 23a, 23b Gutter 24 Compressor 25 Air passage 26 Outer fan 27a Refrigerator drain pipe 27b Refrigerator drain pipe 28, 29, 30 Insulation partition wall 31 Control board 32 Evaporator 35 Chilled room 39 Machine room 40a Refrigerator evaporator temperature sensor 40 b Refrigerator evaporator temperature sensor 41 Refrigerator room temperature sensor 42 Freezer room temperature sensor 43 Vegetable room temperature sensor 50a, 50b Dissipator (heat dissipation means)
51 Dew condensation suppression pipe (heat dissipation means)
52 Three-way valve (refrigerant control means)
53a Refrigerating capillary tube (decompression means)
53b Freezing capillary tube (decompression means)
54b Air-liquid separator for refrigeration 54b Air-liquid separator for refrigeration 55a, 55b Heat exchange part 56 Check valve 101 Gutter heater 102 Drain pipe upper heater 103 Drain pipe lower heater

Claims (4)

A first refrigerating temperature zone chamber is provided above the freezing temperature zone chamber, and a vegetable chamber fixed to the refrigerating temperature zone is provided below the refrigerating temperature zone chamber.
The first evaporator located substantially behind the first refrigerating temperature zone chamber, the first evaporator storage chamber for accommodating the first evaporator, and the air heat-exchanged with the first evaporator are first evaporated. The first ventilation path leading from the vessel storage chamber to the first refrigerating temperature zone chamber, the first return path leading air from the first refrigerating temperature zone chamber to the first evaporator storage chamber, and the first refrigerating temperature zone. The first blower that forms a circulating air flow in the room,
A second evaporator, which is located substantially behind the refrigerating temperature zone chamber and whose temperature during the refrigerating operation is lower than that of the first evaporator during the refrigerating operation, and a second evaporator storage chamber for accommodating the second evaporator. And the second air passage that guides the air that has exchanged heat with the second evaporator from the second evaporator storage chamber to the refrigerating temperature zone chamber, and the air from the refrigerating temperature zone chamber to the second evaporator storage chamber. The second return path to be guided, the vegetable chamber return path for guiding air from the second air passage to the vegetable chamber, the vegetable chamber return path for guiding air from the vegetable chamber to the second evaporator storage chamber, and the refrigeration. It has a second blower that forms a circulating air flow in the temperature zone chamber and the vegetable chamber.
The air that has exchanged heat with the second evaporator is blown by the drive of the second blower to cool the freezing temperature zone chamber and the vegetable chamber.
Further, a first heat insulating partition wall separating the freezing temperature zone chamber and the first refrigerating temperature zone chamber and a second heat insulating partition wall separating the freezing temperature zone chamber and the vegetable chamber are further provided.
The vegetable compartment return air passage is provided in the second heat insulating partition wall.
When sending cold air to the vegetable compartment, the second evaporator is driven at a higher speed than the rotation speed during the refrigeration operation, so that the second evaporator is driven at a higher speed than the rotation speed during the refrigeration operation. Make it cooler than the temperature of
A refrigerator characterized in that the amount of air supplied to the vegetable compartment is less than the amount of air supplied to the freezing temperature zone chamber. The freezing temperature zone chamber is a storage chamber fixed to the freezing temperature zone.
The refrigerator according to claim 1, wherein the first refrigerated temperature zone chamber is a storage chamber fixed to the refrigerated temperature zone. The refrigerator according to claim 1, wherein the inlet of the vegetable compartment return air passage is provided on the front side of the second heat insulating partition wall. The vegetable room
Through the second heat insulating partition wall, the freezing temperature zone chamber is cooled by the air that has exchanged heat with the second evaporator, and is also cooled.
The air that has exchanged heat with the second evaporator is blown according to the excess or deficiency of cooling of the vegetable chamber.
The refrigerator according to claim 1, wherein the refrigerator is not provided with a storage chamber below the vegetable compartment.

Images