JP2016161268A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator increased in energy-saving performance.SOLUTION: A refrigerator includes: a refrigeration temperature flow ventilation passage 11 including first storage rooms 2 and 6; a freezing temperature flow ventilation passage 12 including a second storage room 60; and a first evaporator 7L and a second evaporator 7R. The refrigeration temperature flow ventilation passage has a refrigeration side air confluent part in which air cooled with the first and second evaporators can converge at a first storage room side, and a refrigeration side return air splitting part 25b for splitting air which has passed the second storage room into a first evaporator side and a second evaporator side. The freezing temperature flow ventilation passage has a freezing side air confluent part in which air cooled with the first and second evaporators can converge at a second storage room side, and a freezing side return air splitting part for splitting air which has passed the second storage room into the first evaporator side and the second evaporator side. There are also included: a first fan 9a on a downstream side of the refrigeration side air confluent part and on an upstream side of the refrigeration side return air splitting part; and a second fan 9b on a downstream side of the freezing side air confluent part and on an upstream side of the freezing side return air splitting part.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a refrigerator.

  As background art of this technical field, there is JP-A-2004-324943 (Patent Document 1). In Patent Document 1, cold air is supplied to a storage chamber using fans 16 and 17 provided corresponding to dampers (baffles) and evaporators 14 and 15 (paragraphs 0024, 0025, 0029, 0030, FIG. 1-3). In addition, one evaporator is set as the evaporating temperature for refrigeration, and the other evaporator is operated as a refrigerated evaporating temperature that does not generate frost or ice for a predetermined time, and then the evaporator is melted from the evaporating temperature for frost or ice. The evaporator is switched from the refrigeration evaporation temperature to the refrigeration evaporation temperature (summary).

  The fan, the evaporator, and the damper are provided in this order from the upstream side. That is, the course of the cool air boosted by the fan is distributed by the dampers on the freezer compartment side and the refrigerator compartment side (FIG. 1).

JP 2004-324943 A

  If the refrigerator door or the freezer door is opened while the evaporator is defrosted, the temperature of the opened storage chamber rises. At this time, from the viewpoint of food storage stability, it is desired to cool the storage chambers whose temperature has risen preferentially and to quickly bring both storage chambers to appropriate temperatures. However, the cool air distributed by the damper control in Patent Document 1 is after being boosted by the fan. In this case, the cold air that has passed through the evaporator is distributed according to the flow path resistance (air path resistance) from the evaporator to the freezer compartment and from the evaporator to the refrigerating room. It is difficult to increase the air flow to The flow resistance can be controlled to some extent by adjusting the opening of the damper, that is, the amount of cold air distributed can be controlled, but there is room for improvement in the upper and lower limits of the ratio of the amount of cold air distributed and the control accuracy within the upper and lower limits. was there.

  The present invention made in view of the above circumstances includes a refrigeration temperature circulation air passage including a first storage chamber in a refrigeration temperature zone, a refrigeration temperature circulation air passage including a second storage chamber in a refrigeration temperature zone, and a first A refrigerator comprising a first evaporator chamber having an evaporator and a second evaporator chamber having a second evaporator, wherein the refrigeration temperature circulation air passage is cooled by the first evaporator. A refrigeration-side air merging section capable of joining the air thus cooled and the air cooled by the second evaporator on the first storage chamber side from the first evaporator and the second evaporator; A refrigerating-side return air diverting section for diverting the air that has passed through the first storage chamber to the first evaporator side and the second evaporator side, The air cooled by the first evaporator and the air cooled by the second evaporator are the first evaporator and the second evaporation. A refrigeration-side air merging section that can be merged on the second storage chamber side, and a refrigeration for diverting the air that has passed through the second storage chamber to the first evaporator side and the second evaporator side. A side return air diverting section, having a first fan downstream from the refrigeration side air merging section and upstream from the refrigeration side air merging section, downstream from the refrigeration side air merging section, And it has a 2nd fan upstream from the said freezing side return air distribution part, It is characterized by the above-mentioned.

According to the present invention, a refrigerator with improved energy saving performance can be provided.
Configurations and effects other than those described above will become apparent from the description of the following examples.

The front view of the refrigerator regarding Example 1. FIG. AA sectional drawing of FIG. FIG. 3 is a front view showing an air passage relating to the first embodiment. The front view of the inside of the freezer compartment regarding Example 1 (The air-path structural members 80 and 81a are abbreviate | omitted). The front view of the inside of the freezer compartment regarding Example 1 (The air-path structural member 80, 81a, 81b, the partition walls 28 and 29 are abbreviate | omitted). Refrigeration cycle block diagram. FIG. 3 is a schematic diagram illustrating an air path configuration related to the first embodiment. The schematic diagram which showed each operation mode at the time of a defrost operation. Flow of air when the rotation speeds of the refrigerator compartment side fan 9a and the freezer compartment side fan 9b are changed in the operation mode C (the refrigerator compartment side fan 9a is low speed and the refrigerator compartment side fan 9b is high speed). Flow of air when the rotation speeds of the refrigerator compartment side fan 9a and the freezer compartment side fan 9b are changed in the operation mode C (the refrigerator compartment side fan 9a is high speed and the refrigerator compartment side fan 9b is low speed). The front view of the refrigerator regarding Example 2. FIG. The front view which shows the air path regarding Example 2. FIG. FIG. 6 is a schematic diagram showing an air path configuration related to Example 3. FIG. 6 is a schematic diagram showing a wind path configuration related to Example 4; FIG. 10 is a schematic diagram showing an air path configuration related to Example 5.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Similar components are denoted by the same reference numerals, and the same description will not be repeated.

≪Refrigerator≫
First, the basic configuration of the refrigerator 1 will be described with reference to FIGS. 1 to 6.
1 is a front view of a refrigerator relating to Example 1, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a front view showing an air passage, and FIGS. 4a and 4b are front views of the inside of the freezer compartment. The refrigerator 1 includes a refrigerator room 2, an ice making room 3, an upper freezer room 4, a lower freezer room 5, and a vegetable room 6 in order from the top as a storage room. The refrigerator compartment 2 and the vegetable compartment 6 are first storage rooms in a refrigerator temperature zone (0 ° C. or higher). The freezing room 60 is a generic name for the ice making room 3, the upper freezing room 4, and the lower freezing room 5, and is a second storage room in a freezing temperature zone (0 ° C. or lower). In the present embodiment, the refrigerator compartment 2 is controlled to be about 4 ° C., the vegetable compartment 6 is about 7 ° C., and the freezer compartment 60 is about −18 ° C.

  The refrigerating room 2 is provided with doors 2a and 2b that are separated from each other on the front side, and the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each a drawer type ice making. The room door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are provided. Hereinafter, the refrigerator compartment doors 2a and 2b, the ice making compartment door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are simply referred to as doors 2a, 2b, 3a, 4a, 5a, and 6a.

  Although details of each member will be described later, the doors 2a, 2b, 3a, 4a, 5a, 6a, the storage containers 3b, 4b, 5b, 6b, and the partition wall 30 are omitted in FIGS. Yes. In FIG. 4a, the airway constituent members 80 and 81a are omitted, and in FIG. 4b, the airway constituent members 80, 81a and 81b and the partition walls 28 and 29 are omitted. In the following, description will be made mainly with reference to FIG.

The inside and the outside of the refrigerator 1 are separated by, for example, a heat insulating box 10 formed by filling with urethane foam and the doors 2a, 2b, 3a, 4a, 5a, and 6a. A plurality of vacuum heat insulating materials 26 are mounted inside the heat insulating box 10 of the refrigerator 1.
The freezer compartment 60 and the vegetable compartment 6 are each provided with a storage container 3b (not shown), 4b, 5b, 6b that is pulled out integrally with the doors 3a, 4a, 5a, 6a. Further, the refrigerator compartment 2 is provided with a shelf 39 that divides the refrigerator compartment 2 into a plurality of compartments, and a plurality of pockets 32 are provided on the doors 2a and 2b.

  The refrigerator 1 includes a temperature setter 15 on the front side of the door 2a, and sets the temperature of the refrigerator compartment 2 and the freezer compartment 60 according to a user's instruction or performs a rapid cooling operation for cooling the refrigerator compartment 2 with a high cooling capacity described later. You can give instructions. In the upper part of the refrigerator 1, a door hinge (not shown) that is fixed to the refrigerator 1 is provided so that the doors 2 a and 2 b can be rotated, and the door hinge is covered with a door hinge cover 38. .

  A partition wall 28 is provided between the refrigerator compartment 2 and the freezer compartment 60, and a partition wall 29 is provided between the freezer compartment 60 and the vegetable compartment 6. In addition, 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, so that the air in the freezing room 60 does not leak out from the gap between the doors 3a, 4a, 5a. A partition wall 30 is provided. When the vegetable compartment 6 is too cold, the vegetable compartment 6 is heated by the vegetable compartment heater 27 provided at the lower part of the partition wall 29 and kept at a predetermined temperature.

[Sensor]
On the rear side of the refrigerator compartment 2, the freezer compartment 60, and the freezer compartment 6, a refrigerator compartment temperature sensor 33, a freezer compartment temperature sensor 34, and a vegetable compartment temperature sensor 35 are provided. For example, as shown in FIG. 4b, a first evaporator temperature sensor 36L is provided above the first evaporator 7L, and a second evaporator temperature sensor 36R is provided above the second evaporator 7R. Yes. The temperature of each storage chamber, the first evaporator 7L, and the second evaporator 7R is detected by each sensor. The refrigerator 1 is also provided with an outside air temperature sensor 37 that detects the temperature outside the box provided inside the door hinge cover 38 and a door sensor (not shown) that detects the open / closed state of each door.

  In addition, a control board 31 on which a CPU, a memory such as a ROM and a RAM, an interface circuit, and the like, which are a part of the control device, are arranged is arranged on the top of the refrigerator 1. The control board 31 is connected to a refrigerator temperature sensor 33, a freezer temperature sensor 34, a vegetable room temperature sensor 35, a first evaporator temperature sensor 36L, a second evaporator temperature sensor 36R, and the like. Based on these output values and the setting of the temperature setting unit 15 and the program recorded in advance in the ROM, the compressor 24, the refrigerator compartment side fan 9a, the freezer compartment side fan 9b, and the dampers 50L, 50R, 52L , 52R, 53L, 53R, and a three-way valve 201 described later.

[machine room]
A machine room 20 including a compressor 24 is provided on the back side of the vegetable room 6. In addition, a trough 21 is provided in the lower part of the evaporator chamber 8. In the defrosting operation for defrosting the frost adhering to the first evaporator 7L and the second evaporator 7R, the defrost water generated by melting the frost is passed through the drainage pipe 22 from the gutter 21 to the machine room. 20 is discharged to the evaporating dish 23 arranged at 20. The machine room 20 allows air outside the warehouse to flow in and out, and the defrost water discharged to the evaporating dish 23 is evaporated by the heat of the compressor 24 and discharged to the outside.

≪Refrigeration cycle≫
Next, the refrigeration cycle of the refrigerator 1 will be described.
FIG. 5 is a refrigeration cycle configuration diagram for the refrigerator 1. The refrigerator 1 is provided with two evaporators, a first evaporator 7L for exchanging heat between the refrigerant and the air in the cabinet, and a second evaporator 7R for exchanging heat between the refrigerant and the air in the cabinet. In the following description, those with L in the code are members related to the first evaporator 7L, and those with R are members related to the second evaporator 7R.

  In the refrigerator 1, the compressor 24, the radiator 41, the capillary tube 42 that is a decompression unit, and the inlet 201 i of the three-way valve 201 are sequentially connected. The three-way valve 201 has two outlets, an outlet 201L and an outlet 201R. The outlet 201L is connected to the first evaporator 7L. The downstream side of the first evaporator 7L includes a check valve 202, a refrigerant. The junctions 204 are connected in this order. On the other hand, the outlet 201R of the three-way valve 201 is connected to the second evaporator 7R, and the downstream side of the second evaporator 7R is connected to the check valve 203 and the refrigerant merging portion 204 in this order, and the first evaporation. It merges with the flow path on the vessel 7L side. The refrigerant junction portion 204 is connected to the compressor 24, and a refrigeration cycle is formed as described above.

  Here, the three-way valve 201 is a refrigerant control means for communicating one or both of the inflow port 201i and the two outflow ports 201L and 201R, and is connected to the first evaporator 7L and the second evaporator 7R. The inflow of the refrigerant can be controlled. The check valves 202 and 203 are members that allow the refrigerant to flow only in one direction, and can suppress the inflow of the refrigerant from the refrigerant joining portion 204 to the first evaporator 7L and the second evaporator 7R.

  When the compressor 24 is operated with the inlet 201i and the outlet 201L connected, the refrigerant discharged from the compressor 24 is the radiator 41, the capillary tube 42, the three-way valve 201, the first evaporator 7L, the check valve. It flows in order of 202 and the refrigerant | coolant merge part 204, and returns to the compressor 24. FIG. The air passing through the first evaporator 7L is cooled to cool the interior.

Moreover, when the inflow port 201i and the outflow port 201R are connected, the air which passes the 2nd evaporator 7R is cooled, and the inside of a store | warehouse | chamber can be cooled.
Furthermore, both the inflow port 201i of the three-way valve 201 and the two outflow ports 201L and 201R can be connected to allow the refrigerant to flow through both the first evaporator 7L and the second evaporator 7R.

≪Airway structure≫
Next, the structure of the air path through which air circulates will be described. The refrigerator 1 has a refrigeration temperature circulation air passage including a refrigeration room 2 and a vegetable compartment 6 which are storage rooms in a refrigeration temperature zone, and a refrigeration temperature circulation air passage including a freezer compartment 60 which is a storage room in a refrigeration temperature zone. Air cooled by the evaporators 7L and 7R is distributed to each air passage.

[Evaporator chamber partition wall 25]
On the back side of the freezer compartment 60, between the freezer compartment 60 and the back wall of the heat insulating box 10, a second evaporator chamber 8R and a first evaporator chamber 8L (for example, shown in FIG. 4b) are formed. doing. The first evaporator chamber 8 </ b> L and the second evaporator chamber 8 </ b> R are divided into left and right by an evaporator chamber partition wall 25. The first evaporator 7L is accommodated in the first evaporator chamber 8L, and the second evaporator 7R is accommodated in the second evaporator chamber 8R.

[Vapor passage in the evaporator room]
FIG. 6 is a schematic diagram showing a wind path configuration. Each component shown in FIG. 6 schematically shows each member shown in FIGS. 2, 3, and 4.
Of the first evaporator chamber 8L, the lower (upstream) space than the first evaporator 7L is referred to as an air passage 8La, and the upper (downstream) space is referred to as an air passage 8Lb. Further, in the second evaporator chamber 8R, the space below (upstream) the second evaporator 7R is referred to as an air passage 8Ra, and the space above (downstream) is referred to as an air passage 8Rb.

  The air path 8La includes a section from the end 25d of the evaporator partition wall 25 on the air path 15 side to the first evaporator 7L and a first evaporation from the end 25b of the evaporator partition wall 25 on the air path 14 side. It is a section combined with the section up to the vessel 7L. The air path 8Ra is a section obtained by combining a section from the end 25d to the second evaporator 7R and a section from the end 25b to the second evaporator 7R.

  Further, the air path 8Lb is a section from the evaporator 7L to the end 25a of the evaporator partition wall 25 on the air path 11 side, and from the evaporator 7L to the end 25c of the evaporator partition wall 25 on the air path 12 side. It is a section combined with the section. The air path 8Rb includes a section from the evaporator 7R to the end 25a of the evaporator partition wall 25 on the air path 11 side, and a section from the evaporator 7R to the end 25c of the evaporator partition wall 25 on the air path 12 side. It is the section which put together.

  Since the evaporator chamber 8L (8La, 8Lb) and the evaporator chamber 8R (8Ra, 8Rb) are partitioned by the evaporator chamber partition wall 25, the air flowing through the air passages 8La, 8Lb and the air passages 8Ra, 8Rb flow. Heat exchange with air is suppressed.

[Air confluence 11a, 12a]
The part where the air cooled by each evaporator 7 joins is called an air joining part. The evaporator chamber partition wall 25 has ends on the air passage 11 side and the air passage 12 side, respectively. The air cooled by the first evaporator 7L can flow into the air passage 11a downstream from the end portion 25a and the air passage 12a downstream from the end portion 25c. Similarly, the air cooled by the second evaporator 7R can flow into the air passage 11a downstream from the end portion 25a and the air passage 12a downstream from the end portion 25c. That is, the air cooled in each of the evaporator chambers 7L and 7R can be distributed to the air passages 11a and 12a, and the air can be merged in the air passages 11a and 12a. In this embodiment, the air passage 11a is an example of an air merging portion on the refrigerator compartment side, and the air passage 12a is an example of an air merging portion on the freezer compartment side.

  In addition, the refrigerator 1 may be provided with the ventilation control part mentioned later, for example in the upstream of the air path 11a, or the upstream of the air path 12a. For this reason, depending on the execution state of the mode described later, the air flowing through the air passages 11a and 12a is only the air cooled by the first evaporator 7L or only the air cooled by the second evaporator 7R. It may be. The air merging portion indicates a region where the air cooled by the first evaporator 7L and the second evaporator 7R can merge.

[Airway 11]
On the back side of the refrigerating room 2, there are an air passage constituting member 80 provided with a refrigerating room temperature sensor 33 for detecting the temperature of the refrigerating room 2, and an air passage 11 constituted by the air passage constituting member 80 and the heat insulating box 10. Is provided. A refrigeration chamber return port 62 is provided at the lower back of the refrigeration chamber 2.

  The air path 11 is an air path that guides the air that has become low temperature in the first evaporator 7 </ b> L or the second evaporator 7 </ b> R to the refrigerator compartment 2. The refrigerating chamber 2 is provided with a refrigerating chamber discharge port 61 for communicating the refrigerating chamber 2 and the air passage 11, and a refrigerating chamber return port 62 for communicating the refrigerating chamber 2 and the air passage 13. The refrigerator 9L or the second evaporator 7R is provided with a refrigerator compartment side fan 9a which is a first fan for blowing the air cooled by the evaporator 7L or the second evaporator 7R to the refrigerator compartment 2 and the vegetable compartment 6. Here, in the air passage 11, the suction side of the refrigerator compartment side fan 9a is called the air passage 11a, and the discharge side is called the air passage 11b. The refrigerator compartment side fan 9a is located on the downstream side of the end portion 25a, that is, in a region where both the air cooled by the evaporators 7L and 7R can flow. As the refrigerator compartment side fan 9a, a fan whose rotation speed can be changed by an instruction of a CPU (not shown) described later is used. Note that the air in the refrigerator compartment 2 is supplied to the vegetable compartment 6 through the air passage 13 connecting the refrigerator compartment return port 62 and the vegetable compartment outlet 63.

[Airways 13, 14, 15]
A vegetable chamber discharge port 63 is provided on the back surface of the vegetable chamber 6, and the vegetable chamber discharge port 63 communicates with the refrigerator compartment return port 62 through the air passage 13. On the front side of the vegetable compartment 6, a vegetable compartment return port 64 that connects the air passage 14 and the vegetable compartment 6 is provided. The air passage 14 communicates with the first evaporator chamber 8L and the second evaporator chamber 8R.

  Here, it is a region on the downstream side of the refrigeration temperature circulation air passage end portion 25a and on the upstream side of the air passage 14 side end portion 25b of the evaporator partition wall 25. That is, the air passage 11 connecting the evaporator chamber 8 and the refrigerator compartment 2, the refrigerator compartment 2, the air passage 13 connecting the refrigerator compartment 2 and the vegetable compartment 6, the vegetable compartment 6, the vegetable compartment 6 and the air passages 8La, 8Rb. Are collectively referred to as a refrigeration temperature circulation air passage. The refrigerator compartment side fan 9a is arranged in the refrigerator temperature distribution air passage.

  The air passage 15 communicates the air passages 8La and 8Ra located downstream of the freezer compartment return port 66 and the return air merging portion 25d.

[Airway 12]
Between the freezer compartment 60, the first evaporator chamber 8L, and the second evaporator chamber 8R, an air passage 12 is provided by air passage constituent members 81a and 81b. The air passage 12 is provided with a freezer compartment side fan 9b which is a second fan for blowing air cooled by the first evaporator 7L or the second evaporator 7R to the freezer compartment 60. Here, in the air passage 12, the suction side of the freezer compartment side fan 9b is called an air passage 12a, and the discharge side is called an air passage 12b. The freezer compartment side fan 9b is located downstream of the end 25c, that is, in a region where both the air cooled by the evaporators 7L and 7R can flow. Similarly to the refrigerator compartment side fan 9a, the freezer compartment side fan 9b uses a fan whose rotational speed can be changed by an instruction of a CPU (not shown) described later.

  Here, the refrigeration temperature circulation air passage described above is a region downstream of the end portion 25c and upstream of the end portion 25d. In other words, the air passage 12 connecting the evaporator chamber 8 and the discharge port 65 of the freezing chamber 60, the freezing chamber 60, and the air passage 15 connecting the return port 66 of the freezing chamber 60 and the return side twin damper 53 are collectively combined with the freezing temperature. It is called a distribution air channel. The freezer compartment fan 9b is arranged in the freezing temperature circulation air passage.

[Return air diverter 25b, 25d]
A portion where the return air returning to the evaporator chamber 8 after cooling each storage chamber is diverted toward the air passage 8La and the air passage 8Ra is referred to as a return air diverting portion. The return air from the freezer compartment 60 passes through the air passage 15 and is diverted toward the air passage 8La and the air passage 8Ra by the end 25d of the evaporator partition wall 25 on the air passage 15 side. The end portion 25d is an example of a return air diversion portion on the freezer compartment side.

  Similarly, the return air from the vegetable compartment 6 passes through the air passage 14 and is diverted toward the air passage 8La and the air passage 8Ra by the end 25b. The end 25b is an example of a return air diversion part on the vegetable room side.

[Blower control unit]
The twin damper is a member that controls two air blowing control means with one stepping motor. A twin damper 50 is provided below (upstream) the air passage 11a. For example, as shown in FIG. 4 a, the twin damper 50 includes a damper 50 </ b> L that is a first damper that controls air blowing from the first evaporator 7 </ b> L to the refrigerator compartment 2, and a refrigerator that is refrigerated from the second evaporator 7 </ b> R. A damper 50R, which is a second damper that controls the blowing of air to the chamber 2, is provided, and the two dampers 50L and 50R are controlled by a single stepping motor (not shown).

  In the refrigerator 1 of the present embodiment, a total of six dampers 50L (dampers between the first evaporator and the outlet of the first storage chamber) and 50R (second evaporator and the first) are used as the air blowing control unit. Damper between the outlets of the storage chamber), 52L (damper between the outlet of the first evaporator and the second storage chamber), 52R (discharger of the second evaporator and the second storage chamber) 53L (damper between the first evaporator and the return port of the second storage chamber), 53R (damper between the second evaporator and the return port of the second storage chamber) Prepare. More specifically, the twin damper 50 that controls airflow to the outlet of the storage room in the refrigeration temperature zone located near the end 25a, and the storage room in the refrigeration temperature zone located near the end 25c. The twin damper 52 for controlling the air blowing to the discharge port and the twin damper 53 for controlling the air blowing from the return port are provided near the end 25d. By using twin dampers, six dampers are controlled by three stepping motors, saving space and reducing costs. The air blowing control unit is not limited to the twin damper as long as the air flow rate can be adjusted, and various known means can be employed. Further, instead of or in addition to the twin damper 50, a twin damper may be provided that is located in the vicinity of the end portion 25b and controls air flow from the return port of the storage room in the refrigeration temperature zone.

  Each damper 50-53 is located in the vicinity of the end of the evaporator chamber partition wall 25 as described above. Specifically, the position of each damper is a position where the space between the evaporator chamber 8 and the air passage 11-15 can be opened and closed by opening / closing each damper, that is, a position where the passage and non-passage of air can be controlled. If it is.

  The air path constituting member 81b is provided with a twin damper 52 on the back side (suction side) of the freezer compartment fan 9b. The twin damper 52 is a damper 52L that is a fifth damper that controls the inflow of air from the air passage 8Lb to the freezer compartment 60, and a sixth damper that controls the inflow of air from the air passage 8Rb to the freezer compartment 60. A damper 52R is provided.

  The air passage constituting member 81a is provided with a freezer compartment discharge port 65 that allows the freezer compartment 60 and the air passage 12 to communicate with each other. There may be one freezing chamber discharge port 65 or two or more. In addition, a twin damper 53 is provided at a freezer return port 66 that communicates the first evaporator chamber 8L, the second evaporator chamber 8R, and the freezer chamber 60 at the lower portion of the air passage constituting member 81a. Yes. The twin damper 53 controls the damper 53L, which is a seventh damper that controls the inflow of air from the freezer compartment 60 to the first evaporator 7L, and the inflow of air from the freezer compartment 60 to the second evaporator 7R. A damper 53R which is an eighth damper is provided.

[Fan layout]
In general, the flow velocity of the region before and after the fan 9 is more uneven on the discharge side of the fan 9 than on the suction side of the fan 9. For this reason, it is preferable in terms of air distribution accuracy to dispose the discharge side of the fan 9 far from the region where air flows. Specifically, the refrigerator compartment side fan 9a is separated from the air passage 14 and the end 25b that is the boundary between the air passages 8Ra and 8La, and the air passage 15 and the end that is the boundary between the air passages 8Ra and 8La. It is preferable to arrange the freezer compartment side fan 9b away from the portion 25d. For this reason, in this embodiment, the fan 9 is arranged in the air passage 11 and the air passage 12. On the other hand, if the fan 9 is provided in the air passages downstream of the refrigerator compartment 2, the vegetable compartment 6, and the freezer compartment 60, for example, the air passages 13, 14, and 15, the fan 9 is in contact with warmer air. It is preferable at the point which can suppress.

  It should be noted that disposing the discharge side of the fan 9 far from the region where the air is diverted (the air passages 8La, 8Rb) may be considered as arranging the suction side of the fan 9 near the region where the air is diverted. .

≪Operation mode≫
Next, the defrosting operation of the refrigerator 1 will be described.

図７は除霜運転時の各運転モードを示した模式図である。除霜運転は、蒸発器７に付着した霜を融解させる運転である。除霜運転の最中は、蒸発器７近傍に設けたヒータ等の電源を任意でオンにしてもよい。図中の白色の矢印は除霜運転中の蒸発器７からの空気の流れで、黒色の矢印は冷凍サイクルにより冷却している状態の蒸発器７からの空気の流れである。表１は各運転モードにおいて、冷凍サイクルにより冷却する蒸発器７とダンパ５０、５２、５３の開閉の組み合わせをまとめたものである。表中の○印は、蒸発器に冷媒を流す場合、または各ダンパを開ける場合を示している。

FIG. 7 is a schematic diagram showing each operation mode during the defrosting operation. The defrosting operation is an operation for melting the frost attached to the evaporator 7. During the defrosting operation, a power source such as a heater provided in the vicinity of the evaporator 7 may be arbitrarily turned on. The white arrow in the figure is the flow of air from the evaporator 7 during the defrosting operation, and the black arrow is the flow of air from the evaporator 7 that is cooled by the refrigeration cycle. Table 1 summarizes the combinations of opening and closing of the evaporator 7 and the dampers 50, 52, and 53 that are cooled by the refrigeration cycle in each operation mode. The circles in the table indicate the case where a refrigerant is passed through the evaporator or the case where each damper is opened.

  As shown in FIG. 7, there are three operation modes A, B, and C when defrosting the first evaporator 7L, and the operation mode when defrosting the second evaporator 7R is D, There are three ways, E and F. Among these, the operation mode C and the operation mode F are operation modes that compensate for insufficient cooling of the refrigerator compartment 2 during the defrosting of the first evaporator 7L or the second evaporator 7R.

[Operation mode A]
First, the operation mode A will be described. In the operation mode A which is the defrosting operation of the first evaporator 7L, the damper 50L is opened and the refrigerator compartment side fan 9a is operated while the compressor 24 is stopped. Since the damper 50L is opened, the air passing through the first evaporator 7L flows in the order of the air path 8Lb and the damper 50L and reaches the air path 11a. Since the air passing through the air passage 11a is pressurized by the refrigerating room side fan 9a, it is blown from the refrigerating compartment discharge port 61 to the refrigerating compartment 2 through the air passage 11b. Next, the air in the refrigerator compartment 2 is blown into the vegetable compartment 6 via the refrigerator compartment return port 62, the air passage 13, and the vegetable compartment outlet 63. The air in the vegetable compartment 6 returns to the first evaporator 7L via the vegetable compartment return port 64, the air passage 14, and the air passage 8La.
In addition, in a present Example, when ventilating to the refrigerator compartment 2, it is the structure by which it is surely ventilated also to the vegetable compartment 6. FIG. Since one of the refrigerator compartment 2 and the vegetable compartment 6 can achieve the same effect, in the explanation of each mode, the refrigerator compartment 2 and the vegetable compartment 6 may be simply referred to as the refrigerator compartment 2 for convenience of explanation. .

  In the operation mode A in which the compressor 24 is stopped, when air is circulated between the first evaporator 7L and the refrigerator compartment 2, the frost of the first evaporator 7L is caused by the air in the refrigerator compartment 2 at 0 ° C. or higher. Is heated, and at the same time, the refrigerator compartment 2 is cooled by the air cooled by the frost of the first evaporator 7L. By the circulation of the air, the frost attached to the first evaporator 7L is heated using the air in the refrigerator compartment 2 as a heat source, and the first evaporator 7L is defrosted. The dampers 50R, 52, and 53 are closed. Since the damper 50R is closed, an increase in the temperature of the evaporator 7R can be suppressed. In addition, since both the dampers 52 and 53 are closed, it is possible to effectively prevent the relatively high temperature air circulating between the first evaporator 7L and the refrigerator compartment 2 from being blown to the freezer compartment 60. ing. That is, the temperature rise of the freezer compartment 60 is suppressed.

  In the refrigerator, an electric heater is usually used for defrosting, but the power consumption of the electric heater is as large as about 100 to 200 W. For example, even if the defrosting time is 30 minutes, the power consumption during defrosting is 50 to 100 Wh. . On the other hand, in the operation mode A in which the air in the refrigerator compartment 2 is defrosted using the heat source, only power consumption (about 1 to 2 W) of the refrigerator compartment side fan 9a is required. The power consumption at that time is 4 to 8 Wh.

[Operation mode B]
Next, the operation mode B will be described. It is used when the temperature of the freezer compartment 60 becomes high during the defrosting operation of the first evaporator 7L. In addition to the control in the operation mode A for defrosting the first evaporator 7L, the freezer compartment 60 is cooled by the second evaporator 7R. The compressor 24 is operated, the three-way valve 201 causes the refrigerant to flow into the second evaporator 7R, and the second evaporator 7R is cooled by the refrigeration cycle. In addition to opening the damper 50L and operating the refrigerator compartment side fan 9a, the dampers 52R and 53R are opened and the freezer compartment side fan 9b is operated.

  The flow of air to the freezer compartment 60 at this time will be described with reference to FIG. First, the air flow relating to the first evaporator 7L and the refrigerator compartment 2 is the same as in the operation mode A. Next, since the compressor 24 is operated and the refrigerant is circulated, the second evaporator 7R has a low temperature (for example, −25 ° C.). Since the air cooled by the second evaporator 7R closes the damper 50R and opens the damper 52R, it passes through the air path 8Rb and the damper 52R and reaches the air path 12a. Since the low-temperature air flowing through the air passage 12a is pressurized by the freezer compartment fan 9b, it flows into the freezer compartment 60 from the freezer outlet 65 via the air passage 12b, and cools the inside of the freezer compartment 60. The air that has cooled the inside of the freezer compartment 60 returns to the second evaporator 7R via the damper 53R and the air passage 8Ra provided at the freezer compartment return port 66, and is cooled again. In addition, when the temperature of the freezer compartment 60 becomes sufficiently low during the execution of the operation mode B, it can be returned to the operation mode A, and the temperature of the freezer compartment 60 is controlled to an appropriate range. Can do.

[Operation modes D and E]
Operation modes D and E which are defrosting operations of the second evaporator 7R are operations in which the first evaporator 7L and the second evaporator 7R in the operation modes A and B are replaced, respectively. In the operation mode D, with the compressor 24 stopped, the damper 50R is opened, the dampers 50L, 51L, 52L, 53L, 52R, and 53R are closed, and the refrigerator-side fan 9a is operated. Thus, the second evaporator 7R performs defrosting by heating the second evaporator 7R with the circulating air from the refrigerator compartment 2.

  The operation mode E is an operation used when the temperature of the freezer compartment 60 becomes high during the defrosting operation of the second evaporator 7R. In addition to the control of the operation mode D for defrosting the second evaporator 7R. Thus, the freezer compartment 60 is cooled by the first evaporator 7L. In a state where the compressor 24 is operated and the refrigerant flows into the first evaporator 7L by the three-way valve 201, the damper 50R, the dampers 52L and 53L are opened, and the refrigerator compartment side fan 9a and the freezer compartment side fan 9b are connected. drive. Thereby, the freezer compartment 60 can be cooled by the 1st evaporator 7L cooled by the refrigerating cycle, cooling the refrigerator compartment 2 by the 2nd evaporator 7R which performs defrosting.

[Operation modes C, F]
Next, the operation mode C that compensates for insufficient cooling of the refrigerator compartment 2 during the defrosting of the evaporator 7L will be specifically described.
In the operation mode C, the refrigerator compartment 2 is cooled with a higher cooling capacity than the operation modes A and B while the first evaporator 7L is being defrosted. In this operation, the refrigerating chamber 2 is cooled by the frost of the first evaporator 7L while the freezing chamber 60 is cooled by evaporating the refrigerant by the second evaporator 7R. Similarly to the operation mode B, the compressor 24 is operated, and the refrigerant flows into the second evaporator 7R by the three-way valve 201, the dampers 50L, 52R, 53R are opened, the refrigerator-side fan 9a, the freezer The room side fan 9b is operated. In the operation mode C, in addition, the damper 50R is opened.

  The air cooled by the first evaporator 7L is sent to the refrigerator compartment 2, and the air cooled by the second evaporator 7R is supplied to the refrigerator compartment 2 and the freezer compartment 60. In addition to the air from the first evaporator 7L during defrosting, air (for example, −25 ° C.) cooled by the second evaporator 7R flowing the refrigerant is also blown into the refrigerator compartment 2. Thereby, since the temperature of the air which flows into the refrigerator compartment 2 becomes lower than the temperature of the air which passed the 1st evaporator 7L, the cooling capacity of the refrigerator compartment 2 can be improved. Since the dampers 52L and 53L are closed, only the air in the refrigerator compartment 2 flows into the first evaporator 7L during this time. Since both the dampers 52L and 53L are arranged, the supply of air (for example, 0 ° C. or higher) from the first evaporator 7L to the freezer compartment 60 can be more effectively suppressed than in either case. The blown air exchanges heat in the refrigerator compartment 2 and easily flows into the first evaporator 7L at a temperature higher than that of the first evaporator 7L. Therefore, the first evaporator 7L can be heated, Similar to the operation modes A and B, the defrosting operation of the first evaporator 7L can be performed.

Therefore, by providing the operation mode C, it is possible to perform the cooling operation of the refrigerator compartment 2 with the increased cooling capacity while performing the defrosting operation of the first evaporator 7L.
Note that during the execution of the operation mode C, for example, the air temperature in the vicinity of the refrigerator outlet 61 becomes lower than the temperature of the air immediately after passing through the first evaporator 7L. Moreover, when the temperature rise of the freezer compartment 60 can be tolerated to some extent, only one of the dampers 52L and 53L may be arranged.

  The same applies to the defrosting operation of the second evaporator 7R. During the defrosting of the second evaporator 7R, the operation of cooling the refrigerator compartment 2 with high cooling capacity in the operation modes D and E. Mode F can be executed. In the operation mode F, in addition to each control of the operation mode E, the damper 50L is opened. Air that passes through the second evaporator 7 </ b> R during defrosting and air that is cooled by the first evaporator 7 </ b> L that flows the refrigerant are blown into the refrigerator compartment 2. The temperature of the air flowing into the refrigerating room 2 from the refrigerating room discharge port 62 becomes lower than that of the operation modes D and E, and the cooling capacity of the refrigerating room 2 can be increased. Since both the dampers 52R and 53R are arranged, the supply of air (for example, 0 ° C. or higher) from the second evaporator 7R to the freezer compartment 60 can be more effectively suppressed than in either case. If the temperature increase of the freezer compartment 60 can be tolerated to some extent, only one of the dampers 52R and 53R may be provided.

  As described above, in the defrosting operation of the first evaporator 7L or the second evaporator 7R, in addition to the operation modes A, B, D, E, the refrigerating room 2 is set with high cooling capacity while performing defrosting. Operation modes C and F for cooling are provided. By providing operation modes C and F, the amount of air distributed to the freezer compartment 60 and the refrigerator compartment 2 can be controlled with high accuracy, and the defrosting operation with high energy saving performance using the air in the refrigerator compartment 2 as a heat source. While performing, the refrigerator which can control the temperature of the refrigerator compartment 2 (and vegetable compartment 6) and the freezer compartment 60 appropriately can be provided.

  In the refrigerator 1 of this embodiment, the arrangement positions of the refrigerator compartment side fan 9a and the freezer compartment side fan 9b are as described above, and the air volume of the fan 9 can be controlled, so the air distribution amount to each storage compartment Can be controlled with high accuracy. That is, when the temperature of the refrigerator compartment 2 rises, it can cool effectively by increasing the amount of air distributed to the refrigerator compartment 2. In addition, the refrigerator 1 of a present Example has the air path resistance from the 1st evaporator 7L and the 2nd evaporator 7R to the freezer compartment 60 respectively, and the 1st evaporator 7L and the 2nd evaporator 7R. It is smaller than the air path resistance from each to the refrigerator compartment 2.

[Fan control for operation modes C and F]
8a and 8b are schematic diagrams illustrating the air flow when the rotation speeds of the refrigerator compartment side fan 9a and the freezer compartment side fan 9b in the operation mode C are changed. Fig. 8a shows that the refrigerator compartment fan 9a is operated at a low speed and the refrigerator compartment fan 9b is operated at a high speed. Fig. 8b shows that the refrigerator compartment fan 9a is operated at a high speed and the refrigerator compartment fan 9b is operated at a low speed. Is the case.

As in FIG. 7, the white arrow in the figure is the air flow from the first evaporator 7L during the defrosting operation, and the black arrow is from the second evaporator 7R cooled by the refrigeration cycle. It is the flow of air.
The refrigerator compartment side fan 9 a is provided in the air passage between the air passage 11 and the air passage 14. In addition, the freezer compartment fan 9 b is provided in the air path between the air path 12 and the air path 15. That is, the refrigerator compartment side fan 9 a is located on the downstream side of the damper 50, and the freezer compartment side fan 9 b is located on the downstream side of the damper 52. It was set as the structure which performs ventilation to the refrigerator compartment 2 side with the refrigerator compartment side fan 9a, and performs ventilation to the freezer compartment 60 with the freezer compartment side fan 9b. Thus, if the rotational speed of the refrigerator compartment side fan 9a is increased, the air volume to the refrigerator compartment 2 side can be increased, and if the rotational speed of the freezer compartment fan 9b is increased, the air volume to the freezer compartment 60 side can be increased. . Therefore, during the defrosting of the first evaporator 7L, the temperature increase of the freezer compartment 60 is suppressed or the temperature is adjusted by adjusting the rotational speeds of the refrigerator compartment fan 9a and the freezer compartment fan 9b. The cooling operation of the refrigerating room 2 with an increased cooling capacity can be performed while reducing the temperature of the freezing room 60 to an appropriate range.
Specifically, compared with the case where the refrigerator compartment side fan 9a shown in FIG. 8a is operated at a low speed and the refrigerator compartment fan 9b is operated at a high speed, the refrigerator compartment side fan 9a shown in FIG. When the fan 9b is operated at a low speed, the air volume to the refrigerator compartment 2 can be increased and the air volume to the freezer compartment 60 can be reduced. Therefore, since the distribution of the air volume to the refrigerator compartment 2 and the freezer compartment 60 can be controlled even when the first evaporator 7L is defrosted, the temperatures of the refrigerator compartment 2 and the refrigerator compartment 60 can be appropriately controlled.

  The same control can be performed in the operation mode F which is the defrosting operation of the second evaporator 7R. In other words, the refrigeration room side fan 9a is operated at high speed and the freezer room side fan 9b is operated at low speed, and the freezer room side fan 9b is operated at low speed as compared with the case where the refrigerator room side fan 9a is operated at low speed and the freezer room side fan 9b is operated at high speed. The airflow to the chamber 2 can be increased, and the airflow to the freezer compartment 60 can be reduced. Therefore, even in the operation mode F that is the defrosting operation of the second evaporator 7R, it is possible to appropriately control the temperatures of the refrigerator compartment 2 and the freezer compartment 60.

  In the present embodiment, both the refrigerator compartment side fan 9a and the freezer compartment side fan 9b are fans whose rotation speed can be changed, but only one of them can be a fan whose rotation speed can be changed. Can be controlled. For example, when the refrigerating room side fan 9a is a fan whose rotation speed can be changed, the rotation speed of the freezing room fan 9b is constant, but if the rotation speed of the refrigerating room side fan 9a is increased, the air volume to the refrigerating room 2 increases. Accordingly, the air volume in the freezer compartment 60 can be reduced. On the contrary, if the rotational speed of the refrigerator compartment side fan 9a is lowered, the air volume to the refrigerator compartment 2 is reduced, and accordingly, the air volume of the freezer compartment 60 can be increased. However, if the rotational speeds of both the refrigerator compartment side fan 9a and the freezer compartment side fan 9b can be changed as in this embodiment, the air volume control of the refrigerator compartment 2 and the refrigerator compartment 60 can be finely controlled. .

  It should be noted that, for example, the wind speed of the refrigerator compartment outlet 61 and the freezer compartment outlet 65 is measured for one day, and the same conditions (for example, the state where air is blown to both the refrigerator compartment 2 and the freezer compartment 60 except when the fan is initially activated) ), However, it can be determined that the rotational speed of either the refrigerator compartment side fan 9a or the freezer compartment fan 9b can be changed. Further, when the power consumption of the refrigerator compartment fan 9a and the freezer compartment fan 9b is measured for one day, and the power consumed by the refrigerator compartment fan 9a and the freezer compartment fan 9b may be different under the same conditions. Can be judged similarly.

  As described above, the air cooled by the first evaporator 7L and the second evaporator 7R is blown by the refrigerator compartment side fan 9a on the refrigerator compartment 2 side, and the refrigerator compartment fan 9b on the refrigerator compartment 60 side. In this configuration, at least one of the refrigerator compartment side fan 9a and the freezer compartment side fan 9b is a fan whose rotation speed can be changed. Thereby, the air distribution amount to each of the freezer compartment 60 and the refrigerator compartment 2 can be controlled with higher accuracy. Performing defrosting operation with high energy saving performance using the air in the refrigerator compartment 2 as a heat source, and cooling the refrigerator compartment 2 with high cooling capacity while controlling the temperature of the freezer compartment 60 even during the defrosting operation. The refrigerator which controls the temperature of the refrigerator compartment 2 (and vegetable compartment 6) and the freezer compartment 60 appropriately can be provided.

  In addition to the above, in the refrigerator 1 of Example 1, it will be described that the energy saving performance of the refrigerator compartment side fan 9a and the freezer compartment side fan 9b is taken into consideration using the air passage configuration shown in FIG.

  In the refrigerator, since the freezer compartment 60 has a lower temperature and more heat enters from the outside of the refrigerator compartment 2 than the refrigerator compartment 2, the amount of air to the freezer compartment 60 is usually increased so that the freezer compartment 60 can be cooled more easily. . In other words, the loss coefficient of the air path on the freezer compartment 60 side is usually reduced with priority. If the loss factor is reduced, the pressure loss that occurs at the same air volume is reduced. For example, in the refrigerator 1 of the present embodiment, the first evaporator chamber 8L and the second evaporator chamber 8R in which the first evaporator 7L and the second evaporator 7R are installed are placed on the back of the freezer compartment 60. The air path on the freezer compartment 60 side is relatively short. The freezer compartment discharge port 65 has an opening area larger than that of the refrigerator compartment discharge port 61 (see FIG. 3). As a result, the loss factor of the air passage on the freezer compartment 60 side is made smaller than the air passage on the refrigerator compartment 2 side. Therefore, since the pressure loss generated in the same air volume differs between the air passage on the refrigerator compartment 2 side and the air passage on the freezer compartment 60 side, it is effective to select a fan according to each air passage. Specifically, in comparison with the freezer compartment fan 9b that sends air to the air passage on the freezer compartment 60 side, the refrigerating room fan 9a that sends air to the air passage on the refrigerator compartment 2 side has the same rotational speed and the same air volume. A fan that increases pressure may be used. Thereby, even when it blows to the refrigerating room 2 or when it blows to the freezer compartment 60, it can blow in the state where the efficiency of a fan is comparatively high, and can obtain high energy-saving performance.

  Here, in the refrigerator 1 of the present embodiment, a centrifugal fan is used for the refrigerator compartment side fan 9a, and a propeller fan is used for the freezer compartment side fan 9b. Compared with a propeller fan, a centrifugal fan tends to have a large pressure at the same rotational speed and the same air volume, and has a relatively high efficiency when air is blown into either the air passage on the refrigerator compartment 2 side or the air passage on the freezer compartment 60 side. It can be blown with. Note that this is not limited to the centrifugal fan and the propeller fan, and the fan may be selected according to the air path. For example, a propeller fan smaller than the freezer compartment fan 9b may be used for the refrigerator compartment fan 9a. Similar effects can be obtained.

  Moreover, although the present Example demonstrated the refrigerator which has two evaporators, the same effect is acquired also about the refrigerator which has one evaporator. That is, a freezer compartment side fan is provided on the freezer compartment side from the freezer damper provided between the evaporator and the freezer compartment outlet, and / or a refrigerator compartment damper provided between the evaporator and the refrigerator outlet. What is necessary is just to provide the refrigerator compartment side fan in the refrigerator compartment side.

  Embodiment 2 of the present invention will be described below. In the present embodiment, the arrangement of the refrigerator compartment 2, the vegetable compartment 6, and the freezer compartment 60 of the first embodiment is changed. The configuration of the present embodiment can be the same as that of the first embodiment except for the following points.

  FIG. 9 is a front view of the refrigerator 1 according to the second embodiment. A freezer room 60 is arranged on the right side, a refrigerator room 2 is arranged on the upper left side, and a vegetable room 6 is arranged on the lower side. The refrigerator compartment 2 and the vegetable compartment 6 are respectively provided with a refrigerator compartment door 2a and a vegetable compartment door 6a that rotate clockwise when viewed from the ceiling surface, and the freezer compartment 60 that is rotated counterclockwise when viewed from the ceiling surface. A chamber door 60a is provided.

  FIG. 10 is a front view of an air passage relating to the second embodiment. In the second embodiment, an air path constituent member 81c is provided instead of the air path constituent members 81a and 81b, and the air paths 12a and 12b are configured by the air path constituent member 81c and the heat insulating box 10. Although the arrangement and shape of each member are different, when schematically represented, the air path configuration is the same as that of the first embodiment shown in FIG.

  For example, also in the refrigerator of Example 2, if the damper 50L is opened and the refrigerator compartment side fan 9a is operated, the air that has passed through the first evaporator 7L is, in order, the air path 8Lb, the damper 50L, the air path 11a, Refrigerating room side fan 9a, air passage 11b, refrigerating room outlet 61, refrigerating room 2, refrigerating room return port 62, air passage 13, vegetable room outlet 63, vegetable room 6, vegetable room return port 64, air path 14, It flows through the air path 8La and is returned to the first evaporator 7L again. That is, as in the first embodiment, air circulates between the first evaporator 7L, the refrigerator compartment 2, and the vegetable compartment 6. Accordingly, by opening the damper 50L and operating the refrigerator compartment side fan 9a, the defrosting operation of the first evaporator 7L using the air in the refrigerator compartment 2 and the vegetable compartment 6 is performed as in the first embodiment. be able to.

  The same applies to the freezer compartment 60. For example, if the dampers 52R and 53R are opened while the freezer compartment fan 9b is in operation, the air that has passed through the second evaporator 7R flows in the order of the air path 8Rb and the damper 52R. , Flows through the air passage 11a, the freezer compartment side fan 9b, the air passage 11b, the freezer compartment discharge port 65, the freezer compartment 60, the freezer compartment return port 66, the damper 53R, and the air passage 8Ra, and is returned to the second evaporator 7R again. . That is, as in the first embodiment, air circulates between the second evaporator 7R and the freezer compartment 60. Therefore, similarly to Example 1, the cooling operation of the freezer compartment 60 by the second evaporator 7R can be performed even when the first evaporator 7L is defrosting.

  Similarly, if the damper 50R is opened while the refrigerator compartment fan 9a is operating, air circulates between the second evaporator 7R, the refrigerator compartment 2, and the vegetable compartment 6. If the dampers 52L and 53L are opened while the freezer compartment fan 9b is in operation, air circulates between the first evaporator 7L and the freezer compartment 60. That is, the same control as in the first embodiment is possible.

  As described above, as shown in FIGS. 9 and 10, even if the arrangement of the storage chambers is different from that in the first embodiment, the air channel configuration shown in FIG. The amount of air distributed to each can be controlled with high accuracy, and the defrosting operation is performed with high energy saving performance using the air in the refrigerator compartment 2 as a heat source. Even during the defrosting operation, the refrigerator compartment 2 (and the vegetable compartment 6). And a refrigerator capable of appropriately controlling the temperature of the freezer compartment 60.

  Embodiment 3 of the present invention will be described below. The configuration of this embodiment can be the same as that of Embodiment 1 or 2 except for the following points.

  The third embodiment is different from the first and second embodiments in the positions of the refrigerator compartment side fan 9a and the freezer compartment side fan 9b. FIG. 11 is a schematic diagram illustrating an air path configuration according to the third embodiment.

  In the first embodiment, the refrigerator compartment fan 9a is provided in the air passage 11 from the dampers 50L and 50R to the refrigerator compartment 2, whereas in this embodiment, the vegetable compartment 6 returns from the storage compartment in the refrigerator temperature zone. It is provided in the air path 14 which is an air path to the area | region where an opening and air branch to the 1st evaporator 7L and the 2nd evaporator 7R. In the first embodiment, the freezer compartment fan 9b is provided in the air passage 12 from the dampers 52L and 52R to the freezer compartment 60, whereas in this embodiment, the freezer compartment fan 9b is provided between the freezer compartment 60 and the dampers 53L and 53R. Is provided. In addition, you may provide the freezer compartment fan 9b in the freezer compartment 60. FIG.

  Although the positions of the refrigerating room side fan 9a and the freezing room side fan 9b are different, the same control as that of the first embodiment shown in FIG. When the damper 50L is opened and the refrigerator compartment side fan 9a is operated, air circulates between the first evaporator 7L and the refrigerator compartment 2. If the damper 50R is opened and the refrigerator compartment side fan 9a is operated, air circulates between the second evaporator 7R and the refrigerator compartment 2. If the dampers 52L and 53L are opened and the freezer compartment fan 9b is operated, air circulates between the first evaporator 7L and the freezer compartment 60. If the dampers 52R and 53R are opened and the freezer compartment fan 9b is operated, air circulates between the second evaporator 7R and the freezer compartment 60.

  Also in the third embodiment, the refrigerator compartment side fan 9a is provided in the refrigeration temperature circulation air passage between the air passage 11 and the air passage 14, and the freezer compartment fan 9b is provided between the air passage 12 and the air passage 15. It is provided in the freezing temperature circulation air passage between. That is, it is configured such that air to the refrigerator compartment 2 side is blown by the refrigerator compartment side fan 9a and air to the freezer compartment 60 side is blown by the refrigerator compartment side fan 9b. Accordingly, if the rotational speed of the refrigerator compartment side fan 9a is increased, only the air volume to the refrigerator compartment 2 side is increased, and if the rotational speed of the freezer compartment side fan 9b is increased, only the air volume to the freezer compartment 60 side is increased.

  Thus, in the same manner as in the first embodiment, in addition to the implementation of the respective operation modes in FIG. 7 and Table 1, the air volume control in the operation mode C described with reference to FIGS. 8a and 8b is possible.

  For example, when the refrigerating room side fan 9a is operated at a low speed and the freezing room side fan 9b is operated at a high speed, the air volume to the refrigerating room 2 is small and the air volume to the freezing room 60 is increased as in FIG. When the side fan 9a is operated at a high speed and the freezer compartment fan 9b is operated at a low speed, the air volume to the refrigerator compartment 2 is large and the air volume to the freezer compartment 60 is reduced as in FIG. 8b.

  As mentioned above, also in the refrigerator of Example 3, the amount of air distribution to each of the freezer compartment 60 and the refrigerator compartment 2 can be controlled with high accuracy, and the energy saving performance using the air of the refrigerator compartment 2 as a heat source is high. The defrosting operation is performed, and the temperatures of the refrigerator compartment 2 (and the vegetable compartment 6) and the freezer compartment 60 can be appropriately controlled even during the defrosting operation.

  Embodiment 4 of the present invention will be described below. The configuration of this embodiment can be the same as that of any of Embodiments 1 to 3 except for the following points.

  Example 4 changes the arrangement | positioning position of the twin damper which controls ventilation by the side of a refrigerator compartment. FIG. 12 is a schematic diagram illustrating an air path configuration relating to the fourth embodiment.

  Instead of the twin damper 50 for controlling the air flow between the air passage 11a and the air passage 8Rb and between the air passage 11a and the air passage 8Lb shown in the embodiment 1 shown in FIG. A twin damper 51 that controls the air flow of the air path 8Ra and the air path 14 and the air path 8La is provided. The twin damper 51 controls the damper 51L, which is a third damper that controls the inflow of air from the vegetable compartment 6 to the first evaporator 7L, and the inflow of air from the vegetable compartment 6 to the second evaporator 7R. A damper 51R which is a fourth damper is provided.

  Although the position of the twin damper that controls the ventilation in the refrigerator compartment is different, the same control as that of the first embodiment shown in FIG. If the damper 51L is opened and the refrigerator compartment side fan 9a is operated, the air in the refrigerator compartment 2 (including the vegetable compartment 6) flows from the air passage 14 to the first evaporator 7L, and the air flows from the first evaporator 7L. It flows into the refrigerator compartment 2 through the path 11. That is, air circulates between the first evaporator 7L and the refrigerator compartment 2 as in the case where the damper 50L is opened in the first embodiment. Here, from the law of conservation of mass, the amount of air flowing in is equal to the amount of air flowing out. Therefore, if the damper 51R is closed and the inflow of air into the second evaporator 7R is suppressed, the second The outflow of air from the evaporator 7R to the refrigerator compartment 2 side is also suppressed. That is, if the damper 51R is closed, the air circulation between the second evaporator 7R and the refrigerator compartment 2 can be suppressed as in the case where the damper 50R is closed in the first embodiment. Similarly, if the damper 51R is opened and the refrigerator-side fan 9a is operated, the air circulates between the second evaporator 7R and the refrigerator compartment 2 as in the case where the damper 50R is opened in the first embodiment. To do. Further, if the damper 51L is closed, the air circulation between the first evaporator 7L and the refrigerator compartment 2 can be suppressed as in the case where the damper 50L is closed in the first embodiment. The configuration on the freezer compartment 60 side is the same as that of the first embodiment.

  As described above, also in the refrigerator according to the fourth embodiment, since the same control as that of the first embodiment can be performed, the same effect as that of the first embodiment can be obtained. That is, the amount of air distribution to the freezer compartment 60 and the refrigerator compartment 2 can be controlled with high accuracy, and the defrosting operation with high energy saving performance using the air in the refrigerator compartment 2 as a heat source is performed. Even if it exists, the temperature of the refrigerator compartment 2 (and vegetable compartment 6) and the freezer compartment 60 can be controlled appropriately.

  If the dampers 50R and 50L are provided in the air path from each evaporator 7 to the refrigerating chamber 2 as in the first embodiment, for example, the refrigerating chamber 2 is sufficiently low in temperature and only the freezing chamber 60 is cooled. The inflow of air from each evaporator 7L to the refrigerator compartment 2 can be more effectively suppressed, and this is preferable in that the temperature of the refrigerator compartment 2 can be easily controlled. Moreover, when the dampers 51R and 51L are provided in the air path to each evaporator 7 in the refrigerator compartment 2 (vegetable compartment 6) as in the fourth embodiment, for example, in the operation mode B, the air in the refrigerator compartment 2 is the second air. It is preferable in that it can be more effectively suppressed from flowing into the evaporator 7R, that is, warm air from the refrigerator compartment 2 used for defrosting can easily flow into only the first evaporator 7L.

  Embodiment 5 of the present invention will be described below. The configuration of this embodiment can be the same as that of any of Embodiments 1 to 4 except for the following points.

  In the fifth embodiment, the twin damper 51 shown in the fourth embodiment is added to the first and second embodiments. FIG. 13 is a schematic diagram showing an air passage configuration relating to the fifth embodiment.

  Compared to the first embodiment, air is circulated between the first evaporator 7L and the refrigerator compartment 2 by opening the damper 51L in addition to the damper 50L. Moreover, air is circulated between the second evaporator 7R and the refrigerator compartment 2 by opening the damper 51R in addition to the damper 50R. The configuration on the freezer compartment 60 side is the same as that of the first embodiment.

  As described above, also in the refrigerator of the fifth embodiment, the same control as that of the first embodiment can be performed, so that the same effect as that of the first embodiment can be obtained. That is, the amount of air distribution to the freezer compartment 60 and the refrigerator compartment 2 can be controlled with high accuracy, and the defrosting operation with high energy saving performance using the air in the refrigerator compartment 2 as a heat source is performed. Even if it exists, the temperature of the refrigerator compartment 2 (and vegetable compartment 6) and the freezer compartment 60 can be controlled appropriately.

  In addition, for example, when air is suppressed from circulating between the first evaporator 7L and the refrigerator compartment 2, both the dampers 50L and 51L are closed, and the air path from the first evaporator 7L to the refrigerator compartment 2 is The air circulation between the first evaporator 7L and the refrigerator compartment 2 can be more effectively suppressed by closing both the air paths from the refrigerator compartment 2 to the first evaporator 7L.

[Summary]
The above is the configuration of each embodiment of the refrigerator according to the present invention. The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.

  For example, although the refrigerator compartment 2 and the vegetable compartment 6 are provided in each embodiment as the storage compartment in the refrigeration temperature zone, any one of the storage compartments in the refrigeration temperature zone may be used. Moreover, in each Example, although the air path of the refrigerator compartment 2 and the vegetable compartment 6 of a refrigeration temperature range is connected in series, ie, when it ventilates to the refrigerator compartment 2, it is set as the air passage which is also ventilated also to the vegetable compartment 6, 2 and the vegetable room 6 may be arranged in parallel so that only one of them can be blown. In this case, you may apply the control regarding the refrigerator compartment 2 demonstrated in each Example to the control of the vegetable compartment 6. FIG.

In each embodiment, the refrigerating room side fan 9a can be provided in the refrigerating temperature circulation air passage. That is, it can be provided in a region from the refrigeration side air merging portion where the air cooled by the first evaporator 7L and the second evaporator 7R merges to the refrigeration side return air diversion portion.
More specifically, from the end 25a to the refrigerator compartment outlet 61, from the refrigerator compartment 2, from the refrigerator compartment return port 62 to the vegetable compartment outlet 63, the vegetable compartment 6, and the vegetable compartment return port 64 to the end portion. It can be provided either in the direction of 25b. When the damper 50 is provided in the vicinity of the end portion 25a, the damper 50 may be provided on the downstream side of the damper 50 in place of the end portion 25a. When the damper 51 is provided in the vicinity of the end portion 25b, the damper 51 may be provided upstream of the damper 51 instead of the end portion 25b.

In each embodiment, the freezer compartment fan 9b can be provided in the freezing temperature circulation air passage. That is, it can be provided in a region from the refrigeration side air merging portion where the air cooled by the first evaporator 7L and the second evaporator 7R merges to the refrigeration side return air branching portion.
More specifically, it can be provided either from the end 25c to the freezer discharge port 65, the freezer 60, or from the freezer return 66 to the end 25d. When the damper 52 is provided in the vicinity of the end portion 25c, the damper 52 may be provided on the downstream side of the damper 52 in place of the end portion 25c. In the case where the damper 53 is provided in the vicinity of the end portion 25d, it may be upstream of the damper 53 instead of the end portion 25d.

  In addition, when the evaporator chamber partition wall 25 is comprised by the member divided | segmented, the air confluence | merging part is not necessarily downstream from the edge parts 25a and 25c, and a return air diversion part is not necessarily upstream from the edge parts 25b and 25d. .

《Other technical ideas》
The present invention includes the following technical ideas.
[Appendix 1]
A refrigeration temperature circulation air passage including a first storage chamber in a refrigeration temperature zone; a refrigeration temperature circulation air passage including a second storage chamber in a refrigeration temperature zone; and a first evaporator. Downstream from the evaporator, the air is diverted toward the refrigeration temperature circulation air passage and the refrigeration temperature circulation air passage, and the return air passed through the first storage chamber upstream from the first evaporator. It is a refrigerator where the return air that has passed through the second storage chamber is joined, and the first fan that blows air to the first storage chamber is divided from the portion of the refrigeration temperature circulation air passage that is divided. A second fan that is arranged downstream and upstream from the portion to be merged and blows air to the second storage chamber is downstream of the portion to be diverted in the refrigeration temperature circulation air passage, and the above A refrigerator characterized by being arranged upstream from the part to be merged.

  According to the configuration of Supplementary Note 1, it is possible to control the distribution amount of air to each of the storage room in the refrigeration temperature zone and the storage room in the freezing temperature zone with high accuracy.

[Appendix 2]
A region downstream from the first evaporator and upstream from the outlet of the second storage chamber, a region upstream from the first evaporator and downstream from the return port of the second storage chamber, and the first Air flow to each of a region downstream from one evaporator and upstream from the discharge port of the first storage chamber or a region upstream from the first evaporator and downstream from the return port of the first storage chamber. The refrigerator according to appendix 1, which has a control unit.

1 Refrigerator 2 Cold room (first storage room)
3 Ice making room (second storage room)
4 Upper freezer room (second storage room)
5 Lower freezer room (second storage room)
6 Vegetable room (first storage room)
7L 1st evaporator 7R 2nd evaporator 8L 1st evaporator room 8R 2nd evaporator room 8La, 8Ra Air path 8Lb, 8Rb Air path 9a Refrigeration room side fan (first fan)
9b Freezer compartment side fan (second fan)
DESCRIPTION OF SYMBOLS 10 Heat insulation box 11 Air path (refrigeration side confluence | merging part) 11a The upstream side 11b from a 1st fan 12 downstream side from a 1st fan 12
12a Upstream side from the second fan 12b Downstream side from the second fan 13, 14, 15 Air passage 20 Machine room 21 樋 22 Drain pipe 23 Evaporating dish 24 Compressor 25 Evaporator compartment partition wall 25a On the refrigerator outlet side End 25b End of vegetable room return side (refrigeration side return air diversion part)
25c End part on the discharge side of the freezer compartment 25d End part on the return side of the freezer compartment (refrigeration side return air distribution part)
26 Vacuum insulation material 27 Vegetable room heaters 28, 29, 30 Partition wall 31 Control board 32 Pocket 33 Cold room temperature sensor 34 Freezer room temperature sensor 35 Vegetable room temperature sensor 36L First evaporator temperature sensor 36R Second evaporator temperature Sensor 37 Outside temperature sensor 38 Door hinge cover 39 Shelf 41 Radiator 42 Capillary tube (pressure reduction means)
50 Twin damper (Damper between the outlet of the evaporator and the first storage chamber)
51 Twin damper (Damper between the evaporator and the return of the first storage room)
52 Twin damper (Damper between the outlet of the evaporator and the second storage chamber)
53 Twin damper (Damper between the evaporator and the return of the second storage room)
50L damper (first damper)
50R damper (second damper)
51L damper (third damper)
51R damper (fourth damper)
52L damper (fifth damper)
52R damper (sixth damper)
53L damper (seventh damper)
53R damper (eighth damper)
60 Freezer room (second storage room)
61 Refrigeration room discharge port 62 Refrigeration room return port 63 Vegetable room discharge port 64 Vegetable room return port 65 Freezer room discharge port 66 Freezer room return port 80 Airway component 81a, 81b, 81c Airway component 201 Three-way valve 202, 203 Check valve 204 Refrigerant junction

Claims (5)

A refrigerated temperature distribution air passage including a first storage chamber in a refrigerated temperature zone;
A refrigeration temperature distribution air passage including a second storage chamber in a refrigeration temperature zone;
A first evaporator chamber having a first evaporator;
A refrigerator comprising a second evaporator chamber having a second evaporator,
The refrigerated temperature distribution air passage is
The air cooled by the first evaporator and the air cooled by the second evaporator can merge on the first storage chamber side from the first evaporator and the second evaporator. Refrigerated air merging section,
A refrigeration-side return air diverting section for diverting the air that has passed through the first storage chamber to the first evaporator side and the second evaporator side;
The refrigeration temperature circulation air passage is
The air cooled by the first evaporator and the air cooled by the second evaporator can merge on the second storage chamber side from the first evaporator and the second evaporator. A freezing side air merging section,
A refrigeration-side return air diverting section for diverting the air that has passed through the second storage chamber to the first evaporator side and the second evaporator side;
Having a first fan downstream from the refrigeration side air merging section and upstream from the refrigeration side return air distribution section;
A refrigerator having a second fan downstream from the refrigeration-side air merging section and upstream from the refrigeration-side return air branching section. The first fan is located upstream from the outlet of the first storage chamber, and / or the second fan is located upstream of the outlet of the second storage chamber. The refrigerator according to claim 1. Air flowing from the first evaporator or the second evaporator to the refrigeration-side merging section;
Air flowing from the refrigeration-side return air diverting section to the first evaporator or the second evaporator;
Air flowing from the first evaporator or the second evaporator to the refrigeration-side merging section, or air flowing from the refrigeration-side return air branching section to the first evaporator or the second evaporator; The refrigerator according to claim 1, further comprising a ventilation control unit that controls the air flow. A compressor, the first evaporator, the second evaporator, and a valve, comprising a refrigeration cycle in which refrigerant circulates,
Controlling the valve so that the refrigerant flows to the second evaporator side,
From the first evaporator to the refrigeration side confluence,
From the refrigerated return air diverting section to the first evaporator,
From the second evaporator to the refrigeration side confluence,
From the second evaporator to the refrigeration side confluence,
From the refrigerated return air diverter to the second evaporator,
4. The refrigerator according to claim 3, wherein a mode for controlling the air blowing control unit is executed such that air passes through a range from the refrigeration-side return air distribution unit to the second evaporator. . Controlling the valve so that the refrigerant flows to the first evaporator side,
From the second evaporator to the refrigeration side confluence,
From the refrigerated return air diverter to the second evaporator,
From the first evaporator to the refrigeration side confluence,
From the first evaporator to the refrigeration side confluence,
From the refrigerated return air diverting section to the first evaporator,
5. The refrigerator according to claim 4, wherein a mode for controlling the air blowing control unit is executed such that air passes through a range from the refrigeration-side return air distribution unit to the first evaporator. .

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