JP2019138481A - refrigerator - Google Patents

Abstract

To provide a refrigerator in which drying of food is not enhanced while realizing uniformization of a temperature in a cooling chamber, in the refrigerator including storage chambers of a plurality of temperature zones and including a cooler for refrigeration and a cooler for freezing.SOLUTION: In a refrigerator including a first cooling temperature zone chamber, a second cooling temperature zone chamber, and a freezing temperature zone chamber, and further including a first cooler disposed at a back portion of the first cooling temperature zone chamber, a first blower for distributing cold air of the first cooler to the first cooling temperature zone chamber, a first air trunk for allowing air to flow from the first cooler to the first cooling temperature zone chamber and returning to the first cooler, a second cooler disposed at a back portion of the freezing temperature zone chamber or the second cooling temperature zone chamber, a second blower for allowing the cold air of the second cooler to be distributed to the freezing temperature zone chamber or the second cooling temperature zone chamber, and a second air trunk for allowing the air to flow from the second cooler to the freezing temperature zone chamber or the second cooling temperature zone chamber and returning to the second cooler, a discharge port of the first air trunk is not formed on a front surface of the first cooling temperature zone chamber so that main flow cold air from the first cooler is directed to a wall surface in the first cooling temperature zone chamber.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a refrigerator.

  A general refrigerator has multiple storage rooms because the appropriate storage temperature differs depending on the food to be stored, such as a refrigerator room, a freezer room, and a vegetable room. Among them, the refrigerator room is designed to be the largest. There are many. Therefore, the temperature distribution of the cold air that cools the inside of the refrigerator is likely to be uneven in the refrigerator compartment. Therefore, as shown in Patent Document 1, there is a cooling air circulation fan provided in the refrigerator compartment so as to equalize the temperature in the refrigerator compartment.

JP 2000-88422 A

  However, in the case of Patent Document 1, by providing a cool air circulation fan in the cabinet, the cool air directly contacts the food, and the drying of the food is promoted.

  In order to solve the above-mentioned problem, a first refrigeration temperature zone chamber, a second refrigeration temperature zone chamber, a refrigeration temperature zone chamber, a first cooler provided at the back of the first refrigeration temperature zone chamber, A first blower for blowing cool air of one cooler to the first refrigeration temperature zone chamber, a first air passage from the first cooler to the first refrigeration temperature zone chamber and returning to the first cooler; A second cooler provided at the back of the refrigeration temperature zone chamber or the second refrigeration temperature zone chamber, and a second air for blowing the cool air of the second cooler to the refrigeration temperature zone chamber or the second refrigeration temperature zone chamber A refrigerator comprising: a blower; and a second air path that flows from the second cooler to the refrigeration temperature zone chamber or the second refrigeration temperature zone chamber and returns to the second cooler. The discharge port is not provided in front of the first refrigeration temperature zone, and the mainstream cold air from the first cooler is used for the first refrigeration temperature. Characterized in that it toward the wall of the band room.

  ADVANTAGE OF THE INVENTION According to this invention, in a refrigerator provided with the refrigerator for refrigeration and the refrigerator for freezing, the refrigerator which does not accelerate | stimulate drying of a foodstuff can be provided, implement | achieving temperature equalization in a refrigerator compartment.

It is a front external view of the refrigerator to which the present invention is applied. It is a longitudinal cross-sectional view which shows the longitudinal cross-section of the refrigerator shown in FIG. It is a cross-sectional view which shows the cross section of the refrigerator shown in FIG. It is a schematic diagram showing the air path structure of the refrigerator concerning an Example. It is the schematic showing the refrigerating cycle structure of the refrigerator concerning an Example. It is an example of the time chart showing the driving | running | working at the normal time of the refrigerator concerning an Example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

<First Embodiment>
An embodiment of the refrigerator according to the present invention will be described. First, the structure of the refrigerator which concerns on an Example is demonstrated, referring FIGS. 1 is a front view of a refrigerator according to the embodiment, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. FIG. 5 is a schematic diagram illustrating the configuration of the refrigeration cycle of the refrigerator according to the embodiment. The heat insulating box 10 of the refrigerator 1 is opened forward, and from above the refrigerator compartment 2 (first refrigerator temperature zone), the ice making compartment 3 and the upper freezer compartment 4, the lower freezer compartment 5, arranged side by side on the left and right. A storage room is formed in the order of the vegetable room 6 (second refrigeration temperature zone room). Hereinafter, the ice making room 3, the upper freezing room 4, and the lower freezing room 5 are collectively referred to as a freezing room 7 (freezing temperature zone room).

  The front opening of the refrigerating room 2 is opened and closed by 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 The drawer-type ice making room door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are opened and closed. Refrigerator compartment packings 95a and 95b (first seal members), ice making door 3a, upper freezer compartment door 4a, and lower freezer compartment door 5a are provided on the outer perimeter of refrigerator compartment doors 2a and 2b. Is a freezer compartment packing 96a, 96b, 96c (second seal member) as a seal member, and a vegetable compartment packing 97 (third seal member) as a seal member on the inner periphery of the vegetable compartment door 6a which is a door of the vegetable compartment 6. When the doors are closed, the flow of air inside and outside the cabinet is suppressed by contacting the front edge of the heat insulating box 10. The peripheral lengths of the refrigerator compartment packings 95a and 95b are 2271 mm and 2441 mm, respectively, and the total peripheral length of the refrigerator compartment packings 95a and 95b (peripheral length of the first seal member) is 4712 mm. The peripheral lengths of the freezer compartment packings 96a, 96b, and 96c are 976 mm, 1416 mm, and 2087 mm, respectively, and the total peripheral lengths of the freezer compartment packings 96a, 96b, and 96c (the peripheral length of the second seal member) are 4209 mm. Moreover, the perimeter of the vegetable compartment packing 97 (perimeter of the third seal member) is 2107 mm.

  In order to fix the refrigerator 1 and the doors 2a and 2b, door hinges (not shown) are provided at the upper and lower parts of the refrigerator compartment 2, and the upper door hinges are covered with a door hinge cover 16. The door 2a is provided with an operation unit 99 for performing an operation for setting the temperature in the cabinet.

  The temperature of the refrigerator compartment 2 and the temperature of the freezer compartment 7 can be selected by the user via the operation unit 99. Specifically, the setting of the maintenance temperature level of the refrigerator compartment 2 and the freezer compartment 7 can be set in three stages of “strong”, “medium”, and “weak”, respectively. 2 ° C, “Medium” is maintained at about 4 ° C., “Low” is maintained at about 6 ° C., and the freezer room 7 is “High” at about −22 ° C., “Medium” at about −20 ° C. Maintained at 18 ° C. The vegetable room 6 is maintained at about 7 ° C. on average.

  The width W of the refrigerator 1 is W = 685 mm (see FIG. 1), the depth D is D = 738 mm (see FIG. 2), and the height H is H = 1833 mm (see FIG. 1). The refrigerator compartment height dimension HR is HR = 787 mm, the freezer compartment height dimension HF is HF = 482 mm, and the vegetable compartment height dimension HV is HV = 334 mm (see FIG. 2). The total rated internal volume based on JISC9801-3: 2015 is 602L, the breakdown is 308L for the refrigerator compartment, 51.2% of the total rated internal volume, the freezer compartment is 180L, 29.9% (of the total rated internal volume) 28% or more), the vegetable compartment is 114L, which is 18.9% of the total rated internal volume.

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

  A plurality of door pockets 33a, 33b, 33c opened upward and a plurality of shelves 34a, 34b, 34c, 34d are provided on the inner side of the doors 2a, 2b of the refrigerator compartment 2 and partitioned into a plurality of storage spaces. . The opening height (broken line in FIG. 2) of the uppermost door pocket 33a is provided at a position higher than that of the uppermost shelf 34a. The freezer compartment 7 and the vegetable compartment 6 are respectively provided with an ice making container (not shown), an upper freezer container 4b, a lower freezer container 5b, and a vegetable compartment container 6b that are pulled out integrally with the doors 3a, 4a, 5a, 6a. I have. The vegetable compartment container 6b is divided into two upper and lower tiers, and a bottle storage space 6c is provided in front of the lower tier for storing beverage bottles. The height of the bottle storage space 6c is 305 mm or more (315 mm in this embodiment) so that 1.5L and 2L beverage bottles can be stood and stored. Also, the ability to store beverage bottles is made known to users through catalogs, instruction manuals, texts such as advertising media, diagrams, photographs, and videos.

  A chilled room 35 that can be set lower than the temperature range of the refrigerator compartment 2 is provided above the heat insulating partition wall 28. In the chilled room 35, the user can select a set temperature via the operation unit 99. Specifically, it can be set to either “temperature level 1” maintained at about 0 to 3 ° C. of the refrigeration temperature zone or “temperature level 2” maintained at about −3 to 0 ° C. of the refrigeration temperature zone. it can.

  A refrigerating cooler chamber 8a is provided substantially at the back of the refrigerating chamber 2, and a refrigerating cooler 14a (first cooler), which is a fin-tube heat exchanger, is accommodated in the refrigerating cooler chamber 8a. Has been. A refrigeration fan 9a (first blower) is provided above the refrigeration cooler 14a. Further, a refrigerator compartment air passage 11 is provided at a substantially center in the width direction of the back of the refrigerator compartment 2, and a refrigerator outlet having an orientation means for directing the air to be blown upward is provided above the refrigerator compartment air passage 11. 11a. In the refrigerator of the present embodiment, the opening surface of the refrigerator compartment discharge port 11a is directed upward as the directing means of the refrigerator compartment discharge port 11a. The cooling air blown upward from the refrigerating chamber discharge port 11a flows along the ceiling surface of the refrigerating chamber 2 as shown by an arrow in FIG. 2, reaches the area in front of the refrigerating chamber 2, and reaches the shelf 34a. , 34b, 34c flows through the gaps between the door pockets 33a, 33b, 33c, and the chilled room 35 through an opening 92 (see FIG. 3) provided at the left rear of the space between the shelf 34c and the shelf 34d. To the refrigeration cooler chamber 8a from the refrigeration chamber return air passages 15a, 15b, 15c (see FIG. 3) provided in the lower front, lower left side, and lower right front of the refrigeration cooler chamber 8a. Return. Further, a part of the air flowing through the space between the shelf 34c and the shelf 34d is used for refrigeration from the refrigerator compartment return air passage 15d (see FIG. 3) provided at the right rear of the space between the shelf 34c and the shelf 34d. Return to the cooler chamber 8a. A part of the refrigerating room return air passage 15c is provided with a deodorizing member 91 (open cell structure deodorizing member as an example) so as to be in contact with the air flowing through the refrigerating room 2.

  By adopting such an air path configuration, the cold air discharged from the refrigerator 14a for refrigeration circulates without directly contacting the food stored in the shelf. Therefore, the refrigerator 2 is not promoted to dry the food. The inside can be cooled. The discharge port 11a of the present embodiment is configured so that the upper side is an opening and cool air is applied to the upper wall surface. However, the position of the opening is not limited to the upper side. Even if it is the structure which hits to the side wall surface on either side, the said objective is achieved. Even if there is a slight opening on the front surface, the above object can be achieved if the upper opening area is sufficiently large relative to the opening area on the front surface and the mainstream cold air is directed to the top surface of the refrigerator compartment 2. The

  Further, in this embodiment, the cold air discharged from the refrigeration cooler 14a flows to the front side along the top surface in the refrigeration chamber 2, and the door pocket 33a is opened from above the doors 2a and 2b of the refrigeration chamber 2. Therefore, the interior of the door pocket 33a can be quickly cooled.

  A refrigeration cooler chamber 8b is provided substantially at the back of the freezer compartment 7, and a refrigeration cooler 14b (second cooler), which is a fin-tube heat exchanger, is accommodated in the refrigeration cooler chamber 8b. Has been. A refrigeration fan 9b is provided above the refrigeration cooler 14b. A freezer compartment air passage 12 is provided at the back of the freezer compartment 7, and a plurality of freezer compartment discharge ports 12 a are provided in the freezer compartment air passage 12 in front of the freezing fan 9 b (second blower). A freezer compartment return air passage 17 (see FIGS. 2 and 3) through which the air sent to the freezer compartment 7 returns is provided in front of the lower portion of the freezer compartment cooler chamber 8b.

  The vegetable room air passage 13 serving as an air passage to the vegetable room 6 is branched from the lower right side of the freezer compartment air passage 12 and passes through the heat insulating partition wall 29. The vegetable room discharge port 13a serving as the outlet of the vegetable room air passage 13 is provided so as to substantially coincide with the height of the lower surface of the heat insulating partition wall 29 at the upper right of the back of the vegetable room 6 and opens downward. The vegetable room air passage 13 is provided with a vegetable room damper 19 which is a cooling control means for the vegetable room 6 (see FIG. 3). A vegetable room return inlet 18a is provided in front of the lower left part of the heat insulating partition wall 29 between the vegetable room 6 and the freezing room 7 and is frozen through the vegetable room return air passage 18 passing through the heat insulating partition wall 29. A flow path reaching the vegetable room return outlet 18b provided in front of the lower part of the cooler room 8b is formed.

  Next, the air path configuration of the refrigerator according to the present embodiment will be described with reference to FIG. The air cooled to the low temperature by exchanging heat with the refrigeration cooler 14a is blown to the refrigeration room 2 via the refrigeration room air passage 11 and the refrigeration room outlet 11a by driving the refrigeration fan 9a. 2 is cooled. The air sent to the refrigerating room 2 returns to the refrigerating cooler room 8a from the refrigerating room return air passages 15a, 15b, 15c and 15d (see FIG. 3). Hereinafter, the air path that flows from the refrigerating cooler chamber 8a through the refrigerating chamber 2 and returns to the refrigerating cooler chamber 8a is referred to as a refrigerating air path 111 (first air path). Further, the air that has become low temperature by heat exchange with the freezer cooler 14b is sent to the freezer compartment 7 through the freezer compartment air passage 12 and the freezer compartment discharge port 12a by driving the freezer fan 9b. The inside of the freezer compartment 7 is cooled. The air sent to the freezer compartment 7 returns from the freezer compartment return air passage 17 to the freezer cooler compartment 8b. In addition, when the vegetable compartment damper 19 is in an open state, a part of the cooling air flowing into the freezer compartment air passage 12 flows through the vegetable compartment air passage 13 and reaches the vegetable compartment 6 through the vegetable compartment discharge port 13a. Cool the vegetable compartment 6. The air sent to the vegetable compartment 6 flows through the vegetable compartment return air passage 18 and returns to the refrigeration cooler compartment 8b. Hereinafter, the air path that flows from the freezer cooler chamber 8b to the freezer cooler chamber 8b through the freezer chamber 7b, and the wind that flows from the freezer cooler chamber 8b to the freezer cooler chamber 8b through the vegetable chamber 6 The road is called a frozen vegetable air path 112 (second air path).

  In the refrigerator of the present embodiment, the refrigeration fan 9a is a centrifugal fan (backward fan) having a blade diameter of 100 mm, and the refrigeration fan 9b is an axial fan (propeller fan) having a blade diameter of 110 mm. The centrifugal fan has a characteristic that the air sucked from the axial direction is turned 90 degrees and blown out in the radial direction. On the other hand, the axial fan has a characteristic of blowing out air sucked from the axial direction in the axial direction. Therefore, the centrifugal fan is excellent in mountability in the air passage that turns the flow sucked in the axial direction by 90 degrees, and the axial fan is excellent in mountability in the air passage that blows out the flow sucked in the axial direction in the axial direction. Accordingly, since the refrigeration fan 9a is configured to turn the air sucked from the front 90 degrees and blow it out to the upper refrigeration chamber air passage 11, a rearward fan, which is a centrifugal fan, is adopted as the refrigeration fan 9b. Has a configuration in which the air sucked from the rear is blown out to the front freezer compartment air passage 12, so that a propeller fan, which is an axial fan, is used to provide a highly space-efficient refrigerator.

  As shown in FIG.2 and FIG.3, the refrigerator compartment temperature sensor 41, the freezer compartment temperature sensor 42, and the vegetable compartment temperature sensor 43 are provided on the back side in the refrigerator compartment 2, the freezer compartment 7, and the vegetable compartment 6 respectively. The temperature of the refrigerator compartment 2, the freezer compartment 7, and the vegetable compartment 6 is detected. Further, a refrigeration cooler temperature sensor 40a is provided above the refrigeration cooler 14a, and a refrigeration cooler temperature sensor 40b is provided above the refrigeration cooler 14b, and the refrigeration cooler 14a and the refrigeration cooler 14b are provided. The temperature is detected. Further, inside the door hinge cover 16 on the ceiling of the refrigerator 1 is provided with an outside air temperature / humidity sensor 37 for detecting the temperature and humidity of the outside air (outside air), and the doors 2a, 2b, 3a, 4a, 5a, 6a. Are provided with door sensors (not shown) for detecting the open / closed state.

  Further, a defrosting heater 21 for heating the refrigeration cooler 14b is provided below the refrigeration cooler chamber 8b. The defrost heater 21 is, for example, an electric heater of 50 W to 200 W, and a 150 W radiant heater is provided in this embodiment. The defrost water (melted water) generated at the time of defrosting the refrigeration cooler 14b flows down into the tub 23b provided at the lower part of the refrigeration cooler chamber 8b, and is stored in the refrigerator via the drain port 22b and the refrigeration drain pipe 27b. 1 reaches the machine room 39 provided at the lower part of the rear (back side), and is discharged to the evaporating dish 32 above the compressor 24 installed in the machine room 39.

  Further, although the defrosting method of the refrigeration cooler 14a will be described later, the defrost water generated at the time of defrosting the refrigeration cooler 14a flows down to the eaves 23a provided at the lower part of the refrigeration cooler chamber 8a, It is discharged to the evaporating dish 32 provided on the upper part of the compressor 24 through the drain port 22a and the refrigeration drain pipe 27a.

  In the machine room 39, the above-described compressor 24 and evaporating dish 32 are provided, as well as an outside heat radiator 50a and an outside fan 26 that are fin-tube heat exchangers. By driving the external fan 26, air flows into the compressor 24 and the external radiator 50a evaporating dish 32, heat dissipation from the compressor 24 and the external radiator 50a is promoted, energy saving performance is improved, and By ventilating, the evaporation of defrosted water accumulated in the evaporating dish 32 is promoted to suppress overflow and improve reliability.

  As shown in FIG. 3, the eaves 23 a includes an eaves heater 101 that melts the defrost water frozen in the eaves 23 a. The refrigeration drain pipe 27 a includes a drain pipe upper heater 102 and a drain pipe lower heater 103. The dredge heater 101, the drain pipe upper heater 102, and the drain pipe lower heater 103 are all heaters having a capacity lower than that of the defrost heater 21. In this embodiment, the dredge heater 101 is 6 W and the drain pipe upper heater 102 is 3W, drain pipe lower heater 103 is 1W.

  Here, when the refrigeration fan 9a is driven, the return air from the refrigeration chamber 2 flows downward toward the tub 23a through the refrigeration chamber return port 15b provided in the upper right of the refrigeration cooler chamber 8a. 23a is heated to raise the temperature. Thereby, the effect of reducing the heating amount of the firewood heater 101 that melts the defrosted water frozen in the firewood 23a is obtained, and the energy saving performance can be enhanced.

  The lower portion of the drain pipe 27a is closer to the outer box 10a than the freezer compartment 7 and the freezer cooler compartment 8b. Thereby, the heating amount of the drain pipe lower heater 103 for melting the defrost water frozen in the drain 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 and a RAM, an interface circuit, etc., which are a part of the control device are mounted. The control board 31 is connected to the refrigerator compartment temperature sensor 41, the freezer compartment temperature sensor 42, the vegetable compartment temperature sensor 43, the cooler temperature sensors 40a, 40b, etc., and the CPU described above sets these output values and the operation unit 99. , Based on a program or the like recorded in advance in the ROM, the compressor 24, the refrigeration fan 9a, the refrigeration fan 9b ON / OFF and the rotational speed control, the defrost heater 21, the soot heater 101, the drain pipe upper heater 102, the drain pipe lower heater 103, and a three-way valve 52, which will be described later, are controlled.

  FIG. 5 is a refrigeration cycle (refrigerant flow path) of the refrigerator according to the first embodiment. In the refrigerator 1 of the present embodiment, the compressor 24 (pushing amount 9.2 cc), the external heat radiator 50a that radiates the refrigerant, the wall surface heat radiating pipe 50b, and the front edges of the heat insulating partition walls 28, 29, and 30 are provided. Condensation suppression piping 50c that suppresses condensation (external heat radiator 50a, external heat radiator 50b, and condensation suppression piping 50c are referred to as heat dissipation means), a three-way valve 52 that is a refrigerant flow control means, and a pressure reduction means that decompresses the refrigerant. A refrigeration capillary tube 53a, a refrigeration capillary tube 53b, a refrigeration cooler 14a that absorbs heat in the storage by exchanging heat between the refrigerant and the air in the storage, and a refrigeration cooler 14b are provided. Further, a dryer 51 for removing moisture in the refrigeration cycle is provided upstream of the three-way valve 52, and liquid refrigerant is supplied to the compressor 24 downstream of the refrigeration cooler 14a and downstream of the refrigeration cooler 14b, respectively. A refrigeration gas / liquid separator 54a and a refrigeration gas / liquid separator 54b for preventing the inflow are provided. Further, a check valve 56 is provided downstream of the refrigeration gas-liquid separator 54b. A refrigeration cycle is configured by connecting these components through refrigerant piping. In the refrigerator of this embodiment, the temperature of the refrigeration cooler 14a and the refrigeration cooler 14b is adjusted by the rotational speed of the compressor 24, the refrigeration fan 9a, and the refrigeration fan 9b. The cooling fan 9a and the freezing fan 9b are referred to as cooler temperature adjusting means. In addition, flammable refrigerant isobutane is used as the refrigerant, and the amount of refrigerant enclosed is 88 g.

  The three-way valve 52 includes an outflow port 52a and an outflow port 52b. With the outflow port 52a in an open state and the outflow port 52b in a closed state, the refrigerant flows into the chilling capillary tube 53a side 1 (refrigeration mode), State 2 (freezing mode) in which the outlet 52a is closed and the outlet 52b is opened, and the refrigerant flows to the freezing capillary tube 53b side, and state 3 (all the outlets 52a and 52b are closed) (Closed mode).

  When the three-way valve 52 is controlled in the state 1 (refrigeration mode), the refrigerant discharged from the compressor 24 flows through the external heat radiator 50a, the external heat radiator 50b, and the dew condensation suppression pipe 50c to radiate heat, and the dryer 51 To the three-way valve 52. Since the three-way valve 52 is in the state 1 (the outlet 52a is in the open state and the outlet 52b is in the closed state), the refrigerant flows through the refrigeration capillary tube 53a and is depressurized to reach the refrigeration cooler 14a. Heat exchange with the return air of the refrigerator compartment 2 is performed. The refrigerant that has exited the refrigeration cooler 14a passes through the refrigeration 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 external heat radiator 50a, the external heat radiator 50b, and the dew condensation suppression pipe 50c to radiate heat, and the dryer 51 To the three-way valve 52. Since the three-way valve 52 is in the state 2 (the outlet 52a is closed and the outlet 52b is open), the refrigerant flows through the refrigeration capillary tube 53b and is depressurized to lower the temperature. In 14b, heat exchange is performed with the return air of the freezer compartment 7 and the return air of the vegetable compartment 6 (when the vegetable compartment damper 19 is in an open state). The refrigerant that has exited the refrigeration cooler 14b passes through the refrigeration 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 refrigeration capillary tube 53a and the refrigeration capillary tube 53b. The refrigerant in 14a or the refrigerant in the refrigeration cooler 14b is collected 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 be in state 1 (refrigeration mode), the compressor 24 is driven, the refrigeration fan 9a is driven, and the refrigeration fan 9b is stopped. “Refrigeration operation” for cooling the refrigerator, the three-way valve 52 is controlled to state 2 (freezing mode), the compressor 24 is driven, the vegetable compartment damper 19 is opened, the refrigeration fan 9a is driven or stopped, "Frozen vegetable operation" that cools the freezer compartment 7 and the vegetable compartment 6 by setting the fan 9b in the driving state, the three-way valve 52 is controlled to the state 2 (freezing mode), the compressor 24 is driven, and the vegetable compartment damper 19 is closed, refrigeration fan 9a is driven or stopped, and refrigeration fan 9b is driven to “freeze operation” to cool freezer compartment 7, and three-way valve 52 is set to state 3 (fully closed mode). Control and drive compressor 24 "Refrigerant recovery operation" in which the refrigerant in the refrigeration cooler 14a or the refrigerant in the refrigeration cooler 14b is recovered to the heat radiating means side, and the three-way valve 52 is in state 3 (fully closed mode). “Stop operation” in which the refrigeration fan 9a is stopped and the refrigeration fan 9b is stopped, the three-way valve 52 is controlled to the state 2 (refrigeration mode) and the compressor 24 is driven, or the three-way valve 52 is stopped. Is controlled in the state 3 (fully closed mode) and the compressor 24 is stopped, and the refrigerant is not flowing into the refrigeration cooler 14a, the refrigeration fan is driven, and the surface of the refrigeration cooler 14a is grown. Compressor with “refrigeration cooler defrosting operation” for defrosting refrigeration cooler 14a while refrigeration chamber 2 is cooled by frost or the regenerator heat of cooler itself, with three-way valve 52 in state 3 (fully closed mode) 24 is stopped, refrigeration fan Each operation of the “refrigeration cooler defrosting operation” in which the refrigerating cooler 14 b is defrosted by setting “a” to the driving state or the stopped state, the refrigerating fan 9 b to the stopped state, and the defrosting heater 21 to be energized. As appropriate, each storage room in the refrigerator 1 is cooled.

  FIG. 6 is a time chart showing a state where the refrigerator according to the present embodiment is installed in an environment of 32 ° C. and a relative humidity of 70% and a stable cooling operation is performed in the normal operation mode. The maintenance temperature level of the refrigerator compartment 2 is set to “medium”, the maintenance temperature level of the freezer compartment 7 is set to “medium”, and the chilled room 35 is set to “temperature level 1”.

Elapsed time t ₀ is the elapsed time refrigerating operation for cooling the refrigerating compartment 2 is started. In the refrigeration operation in the normal operation mode, the three-way valve 52 is controlled to the state 1 (refrigeration mode), the compressor 24 is driven at a speed 1 (800 min ⁻¹ ), and the refrigerant is supplied to the refrigeration cooler 14a. The temperature of the refrigeration cooler 14a is decreasing. In this state, the refrigeration fan 9a is driven at a speed of 2 (1500 min ⁻¹ ), so that the low temperature air passing through the refrigeration cooler 14a passes through the refrigeration chamber discharge port 11a (see FIG. 2). The refrigeration chamber 2 is cooled and the temperature is lowered.

Here, the time average temperature of the refrigerating cooler 14a during the refrigerating operation is −6 ° C., which is higher than the time average temperature −24 ° C. of the refrigerating cooler 14b during the refrigerating operation described later. In general, the higher the cooler temperature (evaporation temperature), the higher the coefficient of performance of the refrigeration cycle (the ratio of the endothermic amount to the input of the compressor 24), and the higher the energy saving performance. In order to maintain the freezing room 7 at the freezing temperature, it is necessary to lower the temperature of the freezing cooler 14b. However, since the freezing room 2 only needs to be maintained at the freezing temperature, the temperature of the freezing cooler 14a is increased. In addition, the rotational speed of the refrigeration fan 9a and the compressor 24 is controlled to improve the energy saving performance. Elapsed time by the refrigerating compartment temperature T _R of the refrigerating compartment temperature sensor 41 at t ₁ is detected is decreased to refrigerating operation end temperature T _{R_off,} it is switched to the refrigerant recovery run from refrigerating operation. In the refrigerant recovery operation, the three-way valve 52 is controlled to state 3 (fully closed mode), the compressor 24 is driven at speed 1 (800 min ⁻¹ ), and the refrigeration fan 9a is driven at speed 2 (1500 min ⁻¹ ). The refrigerant in the cooler 14a is recovered for 2 minutes (ΔT _A1 = 2 min). Thereby, the cooling efficiency fall by the refrigerant | coolant shortage by the following frozen vegetable driving | operation and freezing driving | operation can be suppressed. At this time, when the refrigeration fan 9a is driven, the residual refrigerant in the refrigeration cooler 14a is utilized for cooling the refrigeration chamber 2, and the refrigeration cooler is heated by the air in the refrigeration chamber 2. The pressure drop in 14a is alleviated. As a result, an increase in the specific volume of the suction refrigerant of the compressor 24 is suppressed, and a large amount of refrigerant can be recovered in a relatively short time, thereby improving the cooling efficiency.

When the refrigerant recovery operation ends (elapsed time t ₂ ), it is determined whether or not the refrigeration cooler defrosting operation is performed. Here, since the setting of the chilled room 35 is “temperature level 1”, the refrigeration fan 9a is driven at a speed of 1 (900 min ⁻¹ ), and the refrigeration cooler defrosting operation is performed. As a result, the temperature of the refrigerating cooler 14a rises, and the temperature rise of the refrigerating chamber 2 is mitigated by the cooling effect due to frost and the regenerative heat of the refrigerating cooler 14a. By providing a mode for performing the defrosting operation of the refrigeration cooler and driving the refrigeration fan in this way, the drive time of the refrigeration fan is longer than the drive time of the refrigeration fan described later, The air in the refrigerator compartment is circulated, so that the temperature inside the refrigerator compartment can be equalized.

The freezing compartment temperature T _F of the freezing compartment temperature sensor 42 detects the elapsed time t ₂ is, frozen vegetables driving frozen vegetables operation since the start has a temperature T _{F_on} above is started, the vegetable compartment vegetable compartment 6 is cooled temperature _{T V} is decreased. In the frozen vegetable operation, the three-way valve 52 is controlled to the state 2 (freezing mode), the compressor 24 is driven at the speed 2 (1400 min ⁻¹ ), and the refrigerant is supplied to the freezing cooler 14b. 14b becomes low temperature. In this state, the vegetable compartment damper 19 is opened, and the freezing fan 9b is driven at a speed of 1 (1200 min ^-1 ), so that the air that has passed through the freezing cooler 14b and has been cooled to the freezing compartment 7 and the vegetable Chamber 6 is cooled.

By vegetable compartment temperature T _V of vegetable compartment temperature sensor 43 at elapsed time t ₃ detects reaches the vegetable compartment cooling end temperature T _{V_off,} it closed vegetable compartment damper 19 has shifted to the freezing operation.

Freezing compartment temperature T _F of the freezing compartment temperature sensor 42 detects the elapsed time t ₄ reaches the freezing operation completion temperature T _{F_off,} and, since the vegetable compartment damper 19 is closed, the freezing operation is completed . Since this time the refrigerating compartment temperature T _R which is refrigerating chamber temperature sensor 41 detects is reached over the refrigerating operation start temperature T _{R_on,} refrigerating operation start condition is satisfied, the refrigerant recovering operation is performed. In the refrigerant recovery operation, the three-way valve 52 is controlled to the state 3 (fully closed mode), the compressor 24 is driven at speed 2 (1400 min ⁻¹ ), and the refrigeration fan 9 b is driven at speed 1 (1200 min ⁻¹ ). The refrigerant in the cooler 14b is recovered for 1.5 minutes (Δt _B1 = 1.5 min). Thereby, the cooling efficiency fall by the refrigerant | coolant shortage by the following refrigeration operation can be suppressed. At this time, by driving the refrigeration fan 9b, the refrigerant remaining in the refrigeration cooler 14b is used for cooling the freezer compartment 7 and is heated in the freezer compartment 7 by the air in the freezer compartment 7. This reduces the pressure drop. As a result, an increase in the specific volume of the suction refrigerant in the compressor 24 is suppressed, and a large amount of refrigerant can be recovered in a relatively short time, thereby improving the cooling efficiency.

The operation in which the freezer compartment 7 is cooled includes the frozen vegetable operation (t2 to t3), the freezing operation (t3 to t4), and the refrigerant recovery operation (t4 to t5). The refrigeration fan 9b and the compressor 24 are controlled so that the time average temperature of the cooler 14b is about -24 ° C. Further, the time average value of the discharge temperature of the refrigerating room during the refrigerating operation in which the refrigerating fan 9a is driven and the refrigerating cooler defrosting operation is −1.5 ° C., chamber maintained temperature _{T F_keep} (4 ℃) and the refrigerating compartment maintained temperature _T arithmetic mean of _{R_keep} (-20 ℃) has a temperature higher than (-8 ° C.).

The refrigeration operation is started again from the elapsed time t ₅ when the refrigerant recovery operation is completed, and the above operation is repeated periodically thereafter. The refrigeration room 2 is about 4 ° C., the freezing room 7 is about −20 ° C., and the vegetable room is Maintained at about 7 ° C.

  Here, since the vegetable room 6 basically stores vegetables and fruits containing a lot of water, the relative humidity in the vegetable room 6 is high. However, in this embodiment, the refrigerator compartment 2 is cooled by a dedicated refrigerator 14a by an independent air passage, and the vegetable compartment 6 is cooled by another refrigerator 14b by another air passage. The air in 6 is not sent to the air path of the refrigerator compartment 2. Therefore, the humid air in the vegetable compartment 2 does not reach the refrigerating room cooler 14a, frost adhesion to the refrigerating room cooler 14a is suppressed, and it is possible to prevent the cooling performance of the refrigerating room 2 from deteriorating. .

  In addition, this invention is not limited to the Example shown above, Various modifications are included. For example, the embodiments described above have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.

1 Refrigerator 2 Refrigerated room (first refrigerated temperature room)
2a, 2b Refrigeration room 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 refrigeration temperature zone room)
6a Vegetable room door 7 Freezer room (generic name for 3, 4 and 5)
8a Cooler room for refrigeration (first cooler storage room)
8b Refrigeration cooler room (second cooler storage room)
9a Refrigeration fan (first blower)
9b Refrigeration fan (second blower)
DESCRIPTION OF SYMBOLS 10 Heat insulation box 10a Outer box 10b Inner box 11 Refrigeration room ventilation path 11a Refrigeration room discharge port 12 Freezer room ventilation path 12a Freezer room discharge port 13 Vegetable room ventilation path 13a Vegetable room discharge port 14a Refrigeration cooler (first cooler) )
14b Refrigeration cooler (second cooler)
15a, 15b 15c Refrigeration room return air passage 16 Hinge cover 17 Freezer compartment return port 18 Vegetable room return air passage 18a Vegetable room return port 19 Vegetable room damper 21 Radiant heaters 22a, 22b Drainage ports 23a, 23b 樋 24 Compressor 25 Air passage 26 Outside fan 27a Refrigeration drain pipe 27b Refrigeration drain pipe 28, 29, 30 Insulating partition wall 31 Control board 32 Evaporating dish 35 Chilled room 39 Machine room 40a Refrigeration cooler temperature sensor 40b Refrigeration cooler temperature sensor 41 Refrigeration Room temperature sensor 42 Freezer room temperature sensor 43 Vegetable room temperature sensors 50a, 50b External radiator (heat radiation means)
50c Condensation suppression piping (heat dissipation means)
51 Dryer 52 Three-way valve (refrigerant control means)
53a Capillary tube for refrigeration (pressure reduction means)
53b Capillary tube for freezing (pressure reduction means)
54a Refrigeration gas / liquid separator 54b Refrigeration gas / liquid separator 55a, 55b Heat exchange unit 56 Check valve 91 Deodorizing members 95a, 95b Refrigeration chamber packing (first seal member)
96a, 96b, 96c Freezer compartment packing (second seal member)
97 Vegetable room packing (third seal member)
101 Head heater 102 Drain pipe upper heater 103 Drain pipe lower heater

Claims (4)

The first refrigeration temperature zone room, the second refrigeration temperature zone room, the freezing temperature zone room,
A first cooler provided at the back of the first refrigerated temperature zone; a first blower for blowing cool air from the first chiller to the first refrigerated temperature zone; and A first air path that flows through the refrigerated temperature zone and returns to the first cooler;
A second cooler provided at the back of the refrigeration temperature zone chamber or the second refrigeration temperature zone chamber, and a second air for blowing the cool air of the second cooler to the refrigeration temperature zone chamber or the second refrigeration temperature zone chamber In a refrigerator comprising: a blower; and a second air path that flows from the second cooler to the refrigeration temperature zone chamber or the second refrigeration temperature zone chamber and returns to the second cooler.
The discharge port of the first air passage is not provided in front of the first refrigeration temperature zone chamber, and the mainstream cold air from the first cooler is directed to the wall surface in the first refrigeration temperature zone chamber. refrigerator.   The refrigerator according to claim 1, wherein the driving time of the first blower is longer than the driving time of the second blower.   The refrigerator according to claim 1, wherein the temperature of the first cooler is higher than the temperature of the second cooler during the cooling operation in the refrigerator according to claim 1.   2. The refrigerator according to claim 1, wherein the discharge port of the first air passage opens upward, and mainstream cold air from the first cooler is directed toward the top surface of the first refrigeration temperature zone. Features a refrigerator.

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