JPWO2014122780A1 - refrigerator - Google Patents

Abstract

A refrigerator capable of realizing low temperature and constant temperature is provided. The refrigerator includes a refrigeration storage chamber set in a refrigeration temperature zone, a first storage container that is provided so as not to be adjacent to the refrigeration storage chamber, and is supplied with cold air, the refrigeration storage chamber, and the first A second storage container provided adjacent to the one storage container and formed so as not to be supplied with cold air. A refrigerator can implement | achieve the temperature reduction and constant temperature of a 2nd storage container by providing the said structure.

Description

  The present invention relates to a refrigerator.

  A refrigerator has been proposed in which the amount of cold air is set individually for the upper and lower cryogenic containers. According to the refrigerator, different temperatures can be set for the air in the upper and lower container and the air in the lower and lower container (see, for example, Patent Document 1).

  However, cold air is intermittently supplied to the upper and lower cryogenic containers. For this reason, the temperature fluctuation of air is large in the upper and lower cryogenic containers.

  On the other hand, the refrigerator which cools an egg storage room with the cold after passing through the storage part for low temperature rooms is proposed. The egg storage chamber of the refrigerator is indirectly cooled. For this reason, the temperature fluctuation | variation of air is suppressed in an egg storage chamber (for example, refer patent document 2).

Japanese Unexamined Patent Publication No. 2001-330361 Japanese Unexamined Patent Publication No. 2002-130934 Japanese Unexamined Patent Publication No. 2003-050074 Japanese Unexamined Patent Publication No. 10-288441 Japanese Patent No. 2624823 Japanese Patent No. 3,903,065

  However, when the load of the food stored in the cold room storage is heavy, the air in the egg storage room cannot be lowered.

  This invention was made in order to solve the above-mentioned subject, and the objective is to provide the refrigerator which can implement | achieve low temperature and constant temperature.

  The refrigerator according to the present invention includes a refrigerated storage room set in a refrigeration temperature zone, a first storage container provided so as not to be adjacent to the refrigerated storage room and supplied with cold air, and the frozen storage A second storage container provided adjacent to the chamber and the first storage container and formed so as not to be supplied with cold air.

  According to this invention, it is possible to realize a low temperature and a constant temperature.

It is the longitudinal cross-sectional view which looked at the refrigerator in Embodiment 1 of this invention from the side surface direction. It is sectional drawing which looked at the chilled room of the refrigerator in Embodiment 1 of this invention from the side surface direction. It is a figure for demonstrating the temperature of the 1st storage container and the 2nd storage container of the refrigerator in Embodiment 1 of this invention. It is a figure for demonstrating the temperature of the air of the 2nd storage container of the refrigerator in Embodiment 1 of this invention. It is sectional drawing which looked at the chilled room of the refrigerator in Embodiment 2 of this invention from the side surface direction. It is a figure for demonstrating the temperature of the air of the 2nd storage container of the refrigerator in Embodiment 2 of this invention. It is sectional drawing which looked at the chilled chamber of the refrigerator in Embodiment 3 of this invention from the side surface direction. It is a perspective view of the principal part of the refrigerator in Embodiment 3 of this invention. It is a figure for demonstrating the temperature of the air of the 2nd storage container of the refrigerator in Embodiment 3 of this invention. It is sectional drawing which looked at the chilled room of the refrigerator in Embodiment 4 of this invention from the side surface direction. It is a figure for demonstrating the temperature of the air of the 2nd storage container of the refrigerator in Embodiment 4 of this invention. It is sectional drawing which looked at the chilled chamber of the refrigerator in Embodiment 5 of this invention from the side surface direction. It is a figure for demonstrating the supercooling cancellation | release of the preservation | save food in the refrigerator in Embodiment 5 of this invention. It is a figure for demonstrating the supercooling cancellation | release of the preservation | save food in the refrigerator in Embodiment 5 of this invention. It is a figure for demonstrating the temperature of the air of the 2nd storage container of the refrigerator in Embodiment 5 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention as viewed from the side.

  In FIG. 1, the refrigerator 1 includes a plurality of storage rooms. For example, the storage room includes a vegetable room 2, a freezer room 3, a switching room 4 (frozen storage room), an ice making room (not shown), a refrigerator room 5, and a chilled room 6.

  The vegetable room 2 is provided in the lower part of the refrigerator 1. On the front side of the vegetable compartment 2, a door 2a is provided. Vegetable room 2 is formed so that it can be pulled out to the near side of refrigerator 1 with door 2a. The freezer compartment 3 is provided immediately above the vegetable compartment 2. The freezer compartment 3 is partitioned from the vegetable compartment 2 by a boundary wall 7. A door 3 a is provided on the front side of the freezer compartment 3. The freezer compartment 3 is formed so that it can be pulled out to the near side of the refrigerator 1 together with the door 3a.

  The switching chamber 4 and the ice making chamber are provided directly above the freezing chamber 3. The switching chamber 4 and the ice making chamber are separated from the freezing chamber 3 by the boundary wall 8. The switching chamber 4 and the ice making chamber are provided in parallel. A door 4 a is provided on the front side of the switching chamber 4. The switching chamber 4 is formed so that it can be pulled out to the front side of the refrigerator 1 together with the door 4a. A door (not shown) is provided on the front side of the ice making chamber. The ice making chamber is formed so that it can be pulled out to the front side of the refrigerator 1 together with the door.

  The refrigeration room 5 is provided immediately above the switching room 4 and the ice making room. The refrigerator compartment 5 is partitioned from the switching compartment 4 and the ice making compartment by a boundary wall 9. A door 5 a is provided on the front side of the refrigerator compartment 5. The door 5a is formed so that it can be opened and closed.

  The chilled chamber 6 is provided at the lowermost part in the refrigerator compartment 5. The chilled chamber 6 is partitioned from the refrigerator compartment 5 by a top plate 6a. The top plate 6 a also functions as a bottom plate of the refrigerator compartment 5. The chilled chamber 6 is divided into a first storage container 6b and a second storage container 6c. The first storage container 6b and the second storage container 6c are provided so as to overlap in the vertical direction.

  The first storage container 6b is provided so as not to be adjacent to the switching chamber 4 and the ice making chamber. Specifically, the first storage container 6b is provided above the switching chamber 4 and the ice making chamber. An opening is formed in the upper part of the first storage container 6b. The opening opens upward. The opening is closed by the top plate 6a. That is, the 1st storage container 6b is adjacent to the refrigerator compartment 5 through the top plate 6a. The 1st storage container 6b is formed so that it can be pulled out to the door side of the refrigerator compartment 5 with guide jigs (not shown), such as a rail.

  The second storage container 6c is provided so as to be adjacent to the switching chamber 4 and the ice making chamber via the boundary wall 9. The second storage container 6c is provided so as to be adjacent to the first storage container 6b. Specifically, the second storage container 6c is provided above the switching chamber 4 and the ice making chamber and below the first storage container 6b. An opening is formed in the upper part of the second storage container 6c. The opening opens upward. The opening is closed by the bottom of the first storage container 6b. The 2nd storage container 6c is formed so that it can be pulled out to the door side of the refrigerator compartment 5 with guide jigs (not shown), such as a rail.

  The bottom surface of the second storage container 6c is formed of a material having high horizontal heat conductivity. For example, the bottom surface of the second storage container 6c is formed of a metal such as aluminum or stainless steel, a high thermal conductive resin, or the like. For example, on the bottom surface of the second storage container 6c, the horizontal thermal conductivity is 10 W / mK or more.

  A cooling air passage 10 and a return air passage 11 are formed on the back side in the refrigerator 1. The cooling air passage 10 and the return air passage 11 are separated from each storage chamber by a wall 12. A vegetable room return air passage 13 is formed in the upper part of the vegetable room 2. An opening is formed at the front end of the vegetable room return air passage 13. The rear end of the vegetable room return air passage 13 is connected to the return air passage 11.

  An air outlet is formed in the wall 12. In the chilled chamber 6, the air outlet 6d is formed on the back side of the upper part of the first storage container 6b. Each air outlet is provided with an inflow damper (not shown).

  A suction port 5 b is formed in the boundary wall 9 on the back side at the bottom of the refrigerator compartment 5. The upper end of the refrigeration chamber return air passage 14 is connected to the suction port 5b. The lower end of the refrigerator compartment return air passage 14 is connected to the vegetable compartment return air passage 13.

  The refrigerator 1 is provided with a refrigeration cycle circuit. The refrigeration cycle circuit includes a compressor 15a, a condenser (not shown), a throttling device (not shown), a cooler 15b, an air conveyance device 15c, and the like.

  For example, the compressor 15 a is arranged in the lower part on the back side in the refrigerator 1. The cooler 15 b is disposed in the lower part of the cooling air passage 10. The air conveyance device 15c is disposed above the cooler 15b.

  In the refrigerator 1, the compressor 15a discharges the refrigerant. The condenser condenses the refrigerant discharged from the compressor 15a. The expansion device expands the refrigerant condensed by the condenser. The cooler 15b cools the air with the refrigerant expanded by the expansion device. For example, the air is −30 ° C. to −25 ° C. The air conveying device 15 c circulates the air cooled by the cooler 15 b in the refrigerator 1.

  As a result, the air is conveyed to each storage chamber via the cooling air passage 10 and each outlet. At this time, the air is distributed by opening and closing each damper. As a result, an individual temperature is set for each storage room.

  For example, the temperature of the freezer compartment 3 is set to the lowest temperature of −22 ° C. to −16 ° C. At this time, the corresponding inflow damper is adjusted to be fully open. For example, the temperature of the switching chamber 4 is set to −22 ° C. to −7 ° C. in the freezing temperature zone. At this time, the corresponding inflow damper is adjusted to a state corresponding to the set temperature. For example, the temperature of the refrigerator compartment 5 is set to 3 ° C to 6 ° C. At this time, the corresponding damper is adjusted to a state corresponding to the set temperature. For example, the temperature of the first storage container 6b is set to 0 ° C. to 2 ° C. At this time, the corresponding damper is adjusted to a state corresponding to the set temperature. For example, the temperature of the vegetable compartment 2 is set to the highest temperature of 5 ° C to 9 ° C. At this time, the corresponding inflow damper is adjusted to be almost fully closed. In the switching chamber 4, the set temperature described above is a standard set temperature. However, an adjusting means (not shown) may be provided in the cabinet or the door so that the cooling level and the standard can be set. In this case, if the set temperature is set to high, the set temperature is 2 degrees lower than the standard set temperature, and if set to weak, the set temperature is set to 2 degrees higher than the standard set temperature and set to the standard. In such a case, the set temperature is the standard set temperature.

  In the freezing room 3, the switching room 4, and the ice making room, the air transferred cools the air in the freezing room 3, the switching room 4, and the ice making room. The air is conveyed to the cooler 15 b through the return air path 11. In the refrigerator compartment 5 and the first storage container 6b, the conveyed air cools the air in the refrigerator compartment 5 and the first storage container 6b. The said air is conveyed to the vegetable compartment 2 via the suction inlet 5b and the refrigerator compartment return air path 14. FIG. The vegetable room 2 is indirectly cooled by the air. The air is mixed with air that has cooled the vegetable compartment 2 in the vegetable compartment return air passage 13. The mixed air is conveyed to the cooler 15b through the return air path 11.

Next, a method for cooling the chilled chamber 6 will be described with reference to FIG.
FIG. 2 is a cross-sectional view of the chilled chamber of the refrigerator according to Embodiment 1 of the present invention as viewed from the side.

  As shown in FIG. 2, the 1st preservation | save food group 16 is preserve | saved at the 1st storage container 6b. For example, the 1st preservation | save food group 16 consists of processed foods, such as yogurt, ham, and cut vegetables. The second stored food group 17 is stored in the second storage container 6c. For example, the second preserved food group 17 consists of fresh foods such as raw meat, sashimi, meat for thawing, and fish for thawing.

  In the 1st storage container 6b, the cooled blowing air A flows in directly from the blower outlet 6d. For example, the temperature of the blown air A is −20 ° C. to −10 ° C. The blown air A cools the first storage container 6b. The temperature of the air in the 1st storage container 6b falls by the said cooling. Thereafter, the blown air A is mixed with the air that has cooled the refrigerator compartment 5 to become return air B. Thereafter, the return air B flows out from the suction port 5b.

  When the inflow of the blown air A stops, the temperature of the air in the first storage container 6b rises. That is, the temperature of the air in the first storage container 6b repeatedly fluctuates. For this reason, the temperature of the 1st preservation | save food group 16 also repeats a fluctuation | variation.

  On the other hand, the second storage container 6c is substantially sealed. For this reason, the blowing air A does not flow into the second storage container 6c. In this case, the second storage container 6 c is indirectly cooled via the boundary wall 9. That is, the temperature of the second storage container 6 c is lowered by the cold radiation from the switching chamber 4.

  Even if the inflow of the blown air A is stopped, the cold radiation from the switching chamber 4 is maintained. That is, the temperature variation of the air in the second storage container 6c is small. For this reason, the temperature fluctuation of the 2nd preservation | save food group 17 is also small.

  The door 5a is adjacent to the high temperature outside air. Furthermore, the door 5a is opened and closed when food is taken in and out. For this reason, in the chilled chamber 6, it can become so high that it is the front side. That is, in the chilled chamber 6, uneven temperature distribution can occur in the horizontal direction.

  However, the bottom surface of the second storage container 6c is formed of a highly heat conductive material having high heat conductivity in the horizontal plane direction. For this reason, the temperature of the bottom surface of the second storage container 6c is made uniform. That is, unevenness in the temperature distribution of the air is improved in the second storage container 6c. For this reason, the 2nd preservation | save food group 17 is preserve | saved in an environment with little temperature fluctuation at low temperature irrespective of the position in the 2nd storage container 6c.

Next, the temperature of the 1st storage container 6b and the 2nd storage container 6c is demonstrated using FIG.
FIG. 3 is a diagram for explaining the temperatures of the first storage container and the second storage container of the refrigerator according to Embodiment 1 of the present invention. The horizontal axis in FIG. 3 is the elapsed time (min). The vertical axis in FIG. 3 is temperature (° C.).

  In FIG. 3, reference numeral 18 denotes an actual temperature history value of air in the chilled chamber 6 that is not divided. Reference numeral 19 denotes a temperature history analysis value of the air in the first storage container 6b. Reference numeral 20 denotes a temperature history analysis value of the air in the second storage container 6c. It is assumed that the temperature of the switching chamber 4 is set in the freezing temperature zone (−18 ° C.).

  As shown in FIG. 3, the temperature history analysis value 19 is reproduced so as to substantially coincide with the temperature history measurement value 18. That is, in the first storage container 6b, the cycle of the temperature history analysis value 19 is about 110 minutes. Also in the second storage container 6c, the cycle of the air temperature history analysis value 20 is about 110 minutes.

  In the first storage container 6b, the average temperature history analysis value 19 is about 0.8 ° C. On the other hand, in the second storage container 6c, the average of the temperature history analysis values 20 is about −0.9 ° C. That is, the average temperature of the air in the second storage container 6c is lower than the average temperature of the air in the first storage container 6b.

  In the first storage container 6b, the fluctuation range of the temperature history analysis value 19 is about 3.6 ° C. On the other hand, in the second storage container 6c, the fluctuation range of the temperature history analysis value 20 is about 2.7 ° C. That is, the temperature fluctuation range of the air in the second storage container 6c is smaller than the temperature fluctuation range of the air in the first storage container 6b.

Next, the temperature of the air in the second storage container 6c will be described with reference to FIG.
FIG. 4 is a diagram for explaining the temperature of air in the second storage container of the refrigerator according to Embodiment 1 of the present invention. The horizontal axis in FIG. 4 is the thickness (mm) of the bottom surface of the second storage container 6c. The vertical axis in FIG. 4 represents the average temperature (° C.) and the temperature fluctuation range (° C.).

  In FIG. 4, 21a is an average temperature analysis value of air in the second storage container 6c whose bottom surface is made of plastic. 21b is an average temperature analysis value of air in the second storage container 6c whose bottom surface is made of aluminum. 22a is an analysis value of the temperature fluctuation range of the air in the second storage container 6c whose bottom surface is made of plastic. 22b is a temperature fluctuation analysis value of the air in the second storage container 6c whose bottom surface is formed of aluminum.

  As shown in FIG. 4, even if the bottom surface of the second storage container 6c is formed of plastic or aluminum, the average temperature analysis values 21a and 21b, the temperature fluctuation range analysis value with respect to the change in the thickness of the bottom surface 22a and 22b hardly change.

  The average temperature analysis value 21b is smaller than the average temperature analysis value 21a. That is, when the material of the bottom surface of the second storage container 6c is changed from plastic to aluminum, the average temperature in the second storage container 6c decreases.

  The temperature fluctuation range analysis value 22b is smaller than the temperature fluctuation range analysis value 22a. That is, when the material of the bottom surface of the second storage container 6c is changed from plastic to aluminum, the temperature fluctuation range of the air in the second storage container 6c decreases.

  According to the first embodiment described above, the second storage container 6 c is adjacent to the switching chamber 4. At this time, the temperature of the second storage container 6 c is lowered by the cold radiation from the switching chamber 4. For this reason, the temperature of the second storage container 6c can be lowered.

  Moreover, the opening part of the 2nd storage container 6c is obstruct | occluded by the bottom face of the 1st storage container 6b. For this reason, the blowing air A does not flow into the second storage container 6c. As a result, the constant temperature of the second storage container 6c can be achieved.

  Further, a driving device such as a damper and a motor is not required for the second storage container 6c. For this reason, the refrigerator 1 can be manufactured at low cost.

  The second preserved food group 17 is preserved in a low temperature environment by lowering the temperature and making the temperature constant of the second storage container 6. In this case, the difference in vapor pressure is small between the second stored food group 17 and the ambient air. For this reason, the preservation | save quality of the 2nd preservation | save food group 17 can be improved. That is, the outflow of moisture (drip) from the second stored food group 17 and the oxidation and change of the second stored food group 17 can be suppressed.

  For example, even if the temperature of the first storage container 6b is set near 0 ° C. of the chilled temperature range, the temperature of the second stored food group 17 in the second storage container 6c is below the freezing point of about −2 ° C. Do not repeat the decline. For this reason, the 2nd preservation | save food group 17 does not freeze. At this time, the temperature of the second preserved food group 17 is not within the range of the maximum ice crystal formation zone of −5 ° C. to −1 ° C. For this reason, in the 2nd preservation | save food group 17, an ice crystal does not grow. For this reason, in the 2nd preservation | save food group 17, destruction of a cell is suppressed. For this reason, it can suppress that a drip generate | occur | produces in large quantities.

  Further, the cooling heat that is excessive with respect to the cooling of the switching chamber 4 is used to cool the second storage container 6c. For this reason, the cooling capacity for cooling the 2nd storage container 6c becomes unnecessary. As a result, energy consumption of the entire refrigerator 1 can be suppressed.

  Processed foods and fresh foods are classified and stored. That is, food can be stored in a state of being organized by type. In this case, it is possible to prevent the smell of raw meat and raw fish from moving to other foods.

  Further, the second storage container 6c has a heat conductive bottom surface higher than that of the first storage container 6b. For this reason, unevenness in the temperature distribution of the air can be improved in the second storage container 6c.

  Note that three or more storage containers may be provided in the chilled chamber 6. In this case, one storage container may be adjacent to the switching chamber 4 via the boundary wall 9. The storage container is cooled by cold radiation from the switching chamber 4. For this reason, the temperature of the storage container can be reduced. Moreover, the energy consumption of the whole refrigerator 1 can be suppressed. Furthermore, if the storage container is substantially sealed, the storage container can be kept at a constant temperature.

  The first storage container 6b may be further divided by a partition plate or the like. For example, the first storage container 6b may be divided into first to third areas. In this case, dairy products such as yogurt and cheese may be stored in the first area. Processed meat products such as ham and sausage may be stored in the second area. Cut vegetables, salads, etc. may be stored in the third area. As a result, the organization and visibility of the first storage container 6b are improved. For this reason, it can prevent forgetting to use the foodstuff in the 1st storage container 6b.

  Further, the second storage container 6c may be further divided by a partition plate or the like. For example, the second storage container 6c may be divided into first to second areas. In this case, the meat may be stored in the first area. The fish can be stored in the second area. As a result, the arrangement and visibility of the second storage container 6c are improved. For this reason, it can prevent forgetting to use the foodstuff in the 2nd storage container 6c.

  Also, a storage chamber other than the chilled chamber 6 may be provided with a plurality of storage containers. In this case, one of the storage containers may be adjacent to a refrigeration storage chamber set in a refrigeration temperature zone such as the switching chamber 4 and the freezing chamber 3 through a boundary wall. The storage container is cooled by cold radiation from the freezer storage chamber. For this reason, the temperature of the storage container can be reduced. Moreover, the energy consumption of the whole refrigerator 1 can be suppressed. Furthermore, if the storage container is substantially sealed, the storage container can be kept at a constant temperature.

Embodiment 2. FIG.
5 is a cross-sectional view of a chilled chamber of a refrigerator according to Embodiment 2 of the present invention as viewed from the side. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

  The front surface of the first storage container 6b of the second embodiment is different from the front surface of the first storage container 6b of the first embodiment. Specifically, the front surface of the first storage container 6b is formed by two visually transparent plates 23. As a result, the front surface of the first storage container 6b is sealed. That is, a gap is formed in the front surface of the first storage container 6b. The air gap functions as an insulating air layer.

  The front surface of the second storage container 6c of the second embodiment is different from the front surface of the second storage container 6c of the first embodiment. Specifically, the front surface of the second storage container 6c is formed by two visually transparent plates 24. As a result, the front surface of the second storage container 6c is sealed. That is, a gap is formed in the front surface of the second storage container 6c. The air gap functions as an insulating air layer.

Next, the temperature of the air in the 2nd storage container 6c is demonstrated using FIG.
FIG. 6 is a diagram for explaining the temperature of air in the second storage container of the refrigerator according to Embodiment 2 of the present invention. The horizontal axis of FIG. 6 is the heat passage rate (W / m ² K) corresponding to the thickness (3 to 10 mm) of the front surface of the second storage container 6c. The vertical axis in FIG. 6 is the average temperature (° C.).

  In FIG. 6, 25 is an average temperature analysis value of air in the second storage container 6c whose front surface is made of plastic. Reference numeral 26 denotes an average temperature analysis value of air in the second storage container 6c whose front surface is formed of a heat insulating material. Reference numeral 27 denotes an average temperature analysis value of air in the second storage container 6c in which a heat insulating air layer is formed in the front surface. It is assumed that the temperature of the air in the refrigerator compartment 5 fluctuates at 4 ± 1.5 ° C. based on the actually measured value.

  If the heat passage rate of the front surface of the second storage container 6c is reduced, the heat insulation performance of the second storage container 6c is improved. As a result, the influence of the high temperature refrigerator compartment 5 is suppressed. For this reason, the average temperature analysis values 25-27 of the air in the 2nd storage container 6c become small.

As shown in FIG. 6, when the front surface of the second storage container 6c is formed of plastic, the heat passage rate is 4.4 to 3.3 W / m with respect to the change in thickness (3 to 10 mm) of the front surface. It varies between ² K. When the front surface of the 2nd storage container 6c is formed with the heat insulating material, with respect to the change (3-10 mm) of the thickness of the said front surface, a heat passage rate changes with 3.5-2.0 W / m < ² > K. When a heat insulating air layer is formed on the front surface of the second storage container 6c, the heat passage rate is between 3.8 and 1.8 W / m ² K with respect to the change in thickness (3 to 10 mm) of the front surface. Change.

  According to the second embodiment described above, the heat insulating air layer is formed on the front surface of the first storage container 6b. The heat insulation performance of the 1st storage container 6b improves by the said heat insulation air layer. For this reason, the temperature of the first storage container 6b can be lowered. As a result, the first preserved food group 16 can be preserved in a low temperature environment. That is, the storage quality of the first stored food group 16 can be improved.

  In this case, even if the front surface of the first storage container 6b is adjacent to the higher temperature refrigerator compartment 5, the supply amount of the blown air A to the first storage container 6b can be suppressed. As a result, energy consumption of the entire refrigerator 1 can be suppressed.

  The front surface of the first storage container 6b is formed of a transparent plate 23. For this reason, the 1st preservation | save food group 16 can be visually recognized, without pulling out the 1st storage container 6b to the near side of the refrigerator 1. FIG. That is, it is possible to ensure a better design than the heat insulating material while ensuring substantially the same heat insulating performance as when the front surface of the first storage container 6b is formed of a heat insulating material.

  Further, a heat insulating air layer is formed on the front surface of the second storage container 6c. The heat insulation performance of the second storage container 6c is improved by the heat insulation air layer. For this reason, the temperature of the second storage container 6c can be lowered. Specifically, when the front surface of the second storage container 6c is compared with the same thickness, the temperature can be lowered by about 1.5 ° C. compared to the second storage container 6c whose front surface is made of plastic. As a result, the second preserved food group 17 can be preserved in a low temperature environment. That is, the storage quality of the second stored food group 17 can be improved.

  Further, the front surface of the second storage container 6 c is formed by a transparent plate 24. For this reason, the 2nd preservation | save food group 17 can be visually recognized, without pulling out the 2nd storage container 6c. That is, it is possible to ensure a better design than the heat insulating material while ensuring substantially the same heat insulating performance as when the front surface of the second storage container 6c is formed of a heat insulating material.

  In addition, you may form the top plate 6a with two board | plates, such as visually transparent resin and glass. Also in this case, a heat insulating air layer is formed on the top plate 6a. As a result, the heat insulation performance of the top plate 6a is improved. For this reason, even if the 1st storage container 6b adjoins the higher temperature refrigerator compartment 5, the temperature reduction of the 1st storage container 6b can be achieved. Moreover, the 1st preservation | save food group 16 can be visually recognized from the upper direction of the top plate 6a. For this reason, it can prevent forgetting to use the food stored in the back | inner side of the 1st storage container 6b.

Embodiment 3 FIG.
FIG. 7 is a cross-sectional view of the chilled chamber of the refrigerator according to Embodiment 3 of the present invention as viewed from the side. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

  The second storage container 6c of the third embodiment is obtained by adding a plurality of plate fins 28 to the bottom surface of the second storage container 6c of the first embodiment. The plurality of plate fins 28 are arranged on the upstream side of the suction port 5b.

Next, the plurality of plate fins 28 will be described with reference to FIG.
FIG. 8 is a perspective view of a main part of the refrigerator according to Embodiment 3 of the present invention.

  As shown in FIG. 8, the plurality of plate fins 28 are formed in a plate shape. The plurality of plate fins 28 are formed of a material having a higher thermal conductivity than the bottom surface of the chilled chamber 6, such as a metal such as aluminum or stainless steel, a high thermal conductive resin, or the like. For example, the plurality of plate fins 28 are formed of a material having a thermal conductivity of 10 W / mK or more in the vertical plane direction.

  The plurality of plate fins 28 are arranged in the ventilation path of the blown air A. The plurality of plate fins 28 are arranged side by side so that the perpendicular line is in a direction perpendicular to the return air B. As a result, a gap is formed between adjacent plate fins 28.

  The upper end portion of each plate fin 28 is connected to the bottom surface of the second storage container 6c. The lower end of each plate fin 28 protrudes downward from the bottom surface of the chilled case. That is, the lower end of each plate fin 28 is close to the boundary wall 9 (not shown in FIG. 8).

  In the present embodiment, the return air B moves along the side surfaces of the plurality of plate fins 28. At this time, the return air B cools the plurality of plate fins 28. As a result, the bottom surface of the second storage container 6 c is cooled by heat conduction from the plurality of plate fins 28.

Next, the temperature of the air in the second storage container 6c will be described with reference to FIG.
FIG. 9 is a diagram for illustrating the temperature of air in the second storage container of the refrigerator according to Embodiment 3 of the present invention. The horizontal axis of FIG. 9 is the distance (floor distance) (mm) between the bottom surface of the second storage container 6c and the boundary wall 9. The vertical axis | shaft of FIG. 9 is average temperature (degreeC).

  In FIG. 9, 29a is an average temperature analysis value of the air in the second storage container 6c whose bottom surface is made of plastic. 29b is an average temperature analysis value of air in the second storage container 6c having a bottom surface made of aluminum.

  As shown in FIG. 9, even if the bottom surface of the second storage container 6c is formed of plastic or aluminum, the average temperature analysis values 29a and 29b become smaller as the floor distance becomes shorter. For example, if the floor distance is shortened from 5 mm to 0 mm, which is equivalent to the current level, the average temperature analysis values 29a and 29b become 0.2 ° C. or more.

  When the floor distance is the same, the average temperature analysis value 29b is 0.1 ° C. or less smaller than the average temperature analysis value 29a. That is, when the material of the bottom surface of the second storage container 6c is changed from plastic to aluminum, the average temperature of the air in the second storage container 6c decreases.

  According to the third embodiment described above, the plate fin 28 having a large heat transfer area is provided on the bottom surface of the second storage container 6c. As a result, in the plate fin 28, the contact probability (heat transfer coefficient) with the return air B increases. For this reason, the bottom surface of the second storage container 6c can be effectively cooled.

  Further, the lower end portion of the plate fin 28 is close to the boundary wall 9. At this time, the lower end portion of the plate fin 28 may be brought into contact with the boundary wall 9. Further, a part of the bottom surface of the second storage container 6c and a part of the boundary wall 9 may be brought into direct contact. In these cases, the second storage container 6c is susceptible to cold radiation from the switching chamber 4. As a result, the temperature of the second storage container 6c can be further reduced.

  In addition, you may form the bottom face of the 2nd storage container 6c, and the plate fin 28 with the same material. In this case, the bottom surface of the second storage container 6c and the plate fin 28 can be manufactured at low cost.

Embodiment 4 FIG.
10 is a cross-sectional view of a chilled chamber of a refrigerator according to Embodiment 4 of the present invention as viewed from the side. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

  The boundary wall 9 of the fourth embodiment is different from the boundary wall 9 of the first embodiment. Specifically, the wall thickness of the boundary wall 9 in the fourth embodiment is thinner than the wall thickness of the boundary wall 9 in the first embodiment.

Next, the temperature of the air in the 2nd storage container 6c is demonstrated using FIG.
FIG. 11 is a diagram for explaining the temperature of air in the second storage container of the refrigerator according to Embodiment 4 of the present invention. The horizontal axis in FIG. 11 indicates the wall thickness (20 to 50 mm) of the boundary wall 9 and the heat transfer rate corresponding to the distance between the bottom surface of the second storage container 6c and the boundary wall 9 (floor distance) (0 to 5 mm). (W / m ² K). The vertical axis in FIG. 11 is the average temperature (° C.).

  In FIG. 11, 30a is the average temperature analysis value of the air in the second storage container 6c when the floor distance of the second storage container 6c whose bottom surface is made of plastic is 5 mm. 30b is an average temperature analysis value of the air in the second storage container 6c when the floor surface distance of the second storage container 6c having the bottom surface made of aluminum is 5 mm. 31a is an average temperature analysis value of the air in the second storage container 6c when the floor surface distance of the second storage container 6c whose bottom surface is made of plastic is 0 mm. 31b is an average temperature analysis value of the air in the second storage container 6c when the floor distance of the second storage container 6c whose bottom surface is made of aluminum is 0 mm.

  If the heat passage rate between the bottom surface of the second storage container 6c and the switching chamber 4 increases, the heat insulation performance of the second storage container 6c decreases. As a result, the second storage container 6 c is easily affected by the cold radiation from the switching chamber 4. For this reason, the average temperature analysis values 30a, 30b, 31a, 31b of the air in the second storage container 6c become small.

  The average temperature analysis value 31a is about 0.2 ° C. smaller than the average temperature analysis value 30a. The average temperature analysis value 31b is smaller by about 0.2 ° C. than the average temperature analysis value 30b. That is, if the floor distance is shortened from 5 mm to 0 mm, the average temperature in the second storage container 6c decreases by about 0.2 ° C.

  The average temperature analysis value 30b is about 0.1 ° C. smaller than the average temperature analysis value 30a. The average temperature analysis value 31b is smaller by about 0.1 ° C. than the average temperature analysis value 31a. That is, when the material of the bottom surface of the second storage container 6c is changed from plastic to aluminum, the average temperature in the second storage container 6c decreases by about 0.1 ° C.

  According to the fourth embodiment described above, the wall thickness of the boundary wall 9 is thin. In this case, the thermal resistance between the second storage container 6c and the switching chamber 4 decreases. For this reason, the second storage container 6 c is easily affected by the cold radiation from the switching chamber 4. As a result, the bottom surface of the second storage container 6c can be effectively cooled. That is, the temperature of the second storage container 6c can be further lowered.

  At this time, the thickness of the boundary wall 9 may be about 30 to 40 mm. In this case, the second preserved food group 17 can be preserved near the freezing point of about −2 ° C. without affecting the environment in the switching room 4. As a result, the storage quality of the second stored food group 17 can be improved.

Embodiment 5. FIG.
12 is a cross-sectional view of a chilled chamber of a refrigerator according to Embodiment 5 of the present invention as viewed from the side. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

  The chilled chamber 6 of the fifth embodiment is obtained by adding a boundary plate 32 to the chilled chamber 6 of the first embodiment. The boundary plate 32 is disposed between the first storage container 6b and the second storage container 6c. As a result, the first storage container 6b and the second storage container 6c are partitioned. At this time, the opening of the second storage container 6 c is closed by the boundary plate 32. That is, the boundary plate 32 functions as a lid of the second storage container 6c.

  In Embodiment 5, the 2nd storage container 6c does not receive external stimuli, such as a vibration and a temperature fluctuation. As a result, in the phase change of the second preserved food group 17, a supercooled state that does not freeze even at a temperature below the freezing point is maintained. That is, the 2nd preservation | save food group 17 is maintained in the state equivalent to rain ice, hoarfrost, etc. in nature. For this reason, the 2nd preservation food group 17 will not be in the stable fixed state. That is, the second preserved food group 17 is not frozen.

Next, with reference to FIGS. 13 and 14, the release of the supercooling of the stored food will be described.
FIG. 13 and FIG. 14 are diagrams for explaining the supercooling release of the stored food in the refrigerator according to Embodiment 5 of the present invention. The horizontal axis in FIG. 13 is the air cooling rate (min / ° C.). The vertical axis | shaft of FIG. 13 is food arrival temperature (degreeC). The horizontal axis of FIG. 14 is the air temperature fluctuation range (° C.). The vertical axis | shaft of FIG. 14 is food arrival temperature (degreeC).

  In FIG. 13 and FIG. 14, 33 is the temperature reached when a sample of raw tuna (50 to 200 g) in which supercooling is maintained is stored for 3 days. Reference numeral 34 denotes the temperature reached by re-storing a sample of raw tuna (50 to 200 g) from which supercooling has been released and storing it for 3 days.

  As shown in FIG. 13, if the air cooling rate is fast, the temperature drops rapidly. In this case, the overcooling of the sample is easily released by the temperature stimulation. If the air cooling rate is set to 40 min / ° C. or more (= 0.025 ° C./min or less), the release of supercooling is completely avoided.

  As shown in FIG. 14, if the air temperature fluctuation range is large, the repetition of the temperature increase and decrease becomes the temperature stimulus. In this case, the overcooling of the sample is easily released by the temperature stimulation. If the temperature fluctuation range is suppressed within 2 ° C., the supercooling is almost maintained. Furthermore, if the temperature of the sample is maintained at −4 ° C. or higher, release of supercooling is completely avoided.

Next, the temperature of the air in the 2nd storage container 6c is demonstrated using FIG.
FIG. 15 is a diagram for illustrating the temperature of air in the second storage container of the refrigerator according to Embodiment 5 of the present invention. The horizontal axis in FIG. 15 is the heat transmission rate (W / m ² K) corresponding to the thickness (3 to 10 mm) of the boundary plate 32. The vertical axis | shaft of FIG. 15 is average temperature (degreeC).

  In FIG. 15, reference numeral 35 denotes an analysis value of temperature fluctuation of air in the second storage container 6c whose front surface is made of plastic. Reference numeral 36 denotes a temperature fluctuation analysis value of air in the second storage container 6c whose front surface is formed of a heat insulating material. Reference numeral 37 denotes a temperature fluctuation analysis value of air in the second storage container 6c in which a heat insulating air layer is formed in the front surface. It is assumed that the temperature of the air in the refrigerator compartment 5 fluctuates at 1 ± 1.5 ° C. based on the actually measured value.

  If the heat passing rate of the boundary plate 32 is reduced, the heat insulating performance of the boundary plate 32 is improved. For this reason, the influence of the 1st storage container 6b with a large temperature fluctuation with respect to the 2nd storage container 6c is suppressed. As a result, the air temperature fluctuation range analysis values 35 to 37 are reduced.

When the boundary plate 32 is made of plastic, the heat passage rate varies between 4.6 and 3.3 W / m ² K with respect to the change in thickness (3 to 10 mm) of the boundary plate 32. When the boundary plate 32 is formed of a heat insulating material, the heat passage rate changes from 3.9 to 2.0 W / m ² K with respect to the change in thickness (3 to 10 mm) of the boundary plate 32. When a heat insulating air layer is formed on the boundary plate 32, the heat passage rate changes between 4.6 and 1.8 W / m ² K with respect to a change in thickness (3 to 10 mm) of the boundary plate 32.

  According to the fifth embodiment described above, the boundary plate 32 closes the opening of the second storage container 6c. For this reason, the blowing air A does not flow directly into the second storage container 6c. As a result, the influence from the 1st storage container 6b with a large temperature fluctuation is suppressed. For this reason, similarly to Embodiment 4, even when the temperature of the 2nd preservation | save food group 17 falls to a freezing point, the temperature fluctuation of the air in the 2nd storage container 6c can be suppressed. As a result, the second preserved food group 17 is not frozen. For this reason, even if the temperature of the 2nd preservation | save food group 17 exists in the range of the maximum ice crystal formation zone of -5 degreeC--1 degreeC, in the 2nd preservation | save food group 17, an ice crystal does not grow. For this reason, in the 2nd preservation | save food group 17, destruction of a cell is suppressed. For this reason, it can suppress that a drip generate | occur | produces in large quantities.

  Further, the second storage container 6 c is indirectly cooled by the cold radiation from the switching chamber 4 through the boundary wall 9. As a result, the cooling rate is reduced as compared with the case of being directly cooled by cold air. That is, the temperature of the second storage container 6c can be lowered while suppressing the cooling rate and temperature fluctuation. For this reason, the overcooling of the second preserved food group 17 can be maintained. As a result, the second stored food group 17 can be stored for a long time without freezing.

Specifically, if the temperature of the air in the second storage container 6c is maintained at −4 ° C. or higher and −2 ° C. or lower, overcooling of the second stored food group 17 can be maintained. In this case, considering Figure 11, may be set in a range of heat transfer coefficient 0.85 W / ^{m 2} K to 1.5 W / ^{m 2} K between the bottom surface and the switching compartment 4 of the second container 6c . Moreover, what is necessary is just to suppress the temperature fluctuation width of the air in the 2nd storage container 6c to 2 degrees C or less. In this case, considering FIG. 15, the heat passing rate of the boundary plate 32 may be set to 1.9 W / m ² K or less.

  In addition, if a heat insulation air layer is formed in the boundary board 32, even if the thickness of the boundary board 32 is the same, the temperature fluctuation of the 2nd storage container 6c can be suppressed about 0.2-0.4 degreeC. That is, the temperature of the second storage container 6c can be further increased. In this case, the storage volume of the first storage container 6b and the second storage container 6c can be secured.

  As described above, the refrigerator according to the present invention can be used in a system that achieves low temperature and constant temperature.

  1 refrigerator, 2 vegetable room, 2a door, 3 freezer room, 3a door, 4 switching room, 4a door, 5 refrigerated room, 5a door, 5b inlet, 6 chilled room, 6a top plate, 6b first storage container, 6c 2nd storage container, 6d outlet, 7 boundary wall, 8 boundary wall, 9 boundary wall, 10 cooling air path, 11 return air path, 12 wall, 13 vegetable room return air path, 14 refrigerator compartment return air path, 15a compression Machine, 15b cooler, 15c air conveying device, 16 first stored food group, 17 second stored food group, 18 temperature history measured value, 19 temperature history analyzed value, 20 temperature history analyzed value, 21a average temperature analyzed value, 21b Average temperature analysis value, 22a Temperature fluctuation analysis value, 22b Temperature fluctuation analysis value, 23 plates, 24 plates, 25 Average temperature analysis value, 26 Average temperature analysis value 27 Average temperature analysis value 28 Plate fin 29a Average temperature analysis value 29b Average temperature analysis value 30a Average temperature analysis value 30b Average temperature analysis value 31a Average temperature analysis value 31b Average temperature analysis value 32 33, Temperature reached, 34 Temperature reached, 35 Temperature fluctuation analysis value, 36 Temperature fluctuation analysis value, 37 Temperature fluctuation analysis value

The refrigerator according to the present invention is formed such that a refrigeration storage room set in a refrigeration temperature zone, a boundary wall provided above the refrigeration storage room, provided above the boundary wall, and supplied with cold air a first housing which is provided with a second container, et al is provided between said freezer compartment said first housing, said second housing is open upwardly, the first It has an opening closed at the bottom of the storage container or a lid provided above the second storage container .

The refrigerator according to the present invention includes a refrigerated storage room set in a freezing temperature zone, a refrigerated storage room set in a temperature zone adjacent to the upper side of the frozen storage room and higher than the freezing temperature zone, and the frozen storage room wherein a boundary wall which is provided between the refrigerated storage compartment, the provided inside the refrigerated storage compartment above the boundary wall, a first housing formed as cold air is supplied, the refrigerating A second storage container provided between the boundary wall and the first storage container inside the storage chamber and formed so as not to be supplied with cold air , and the second storage container opens upward. , those having an opening which is closed on the bottom of the first container.

Claims (15)

A freezer storage room set in a freezing temperature zone;
A first storage container provided so as not to be adjacent to the frozen storage room and supplied with cold air;
A second storage container provided adjacent to the frozen storage chamber and the first storage container and formed so as not to be supplied with cold air;
Refrigerator equipped with. A boundary wall provided above the frozen storage room;
With
The first storage container is provided above the frozen storage room,
The refrigerator according to claim 1, wherein the second storage container is provided between the boundary wall and the first storage container.   The refrigerator according to claim 2, wherein the second storage container has an opening that opens upward and is closed at a bottom of the first storage container. A lid provided above the second storage container;
With
The refrigerator according to claim 2, wherein the second storage container has an opening that opens upward and is closed by the lid.   The said 2nd storage container is a refrigerator as described in any one of Claims 2-4 which had a heat conductive bottom face higher than a said 1st storage container.   The refrigerator according to any one of claims 2 to 5, wherein the second storage container has a front surface formed of two transparent plates sandwiching an air layer. A fin that is provided between the bottom surface of the second storage container and the boundary wall, has higher thermal conductivity than the bottom surface of the second storage container, and is connected to the bottom surface of the second storage container;
The refrigerator as described in any one of Claims 2-6 provided with.   The refrigerator according to any one of claims 2 to 6, wherein the second storage container has a bottom surface in contact with the boundary wall.   The refrigerator according to any one of claims 2 to 8, wherein the second storage container is formed so as to store fresh food. A cooler for supplying cold air to the frozen storage room so that the food stored in the second storage container maintains a supercooled state;
The refrigerator as described in any one of Claims 2-9 provided with. The boundary wall, refrigerator according to claim 10 having a heat transfer coefficient in the range of 0.85 W / ^{m 2} K to 1.5W / ^{m 2} K. A boundary plate provided between the first storage container and the second storage container;
The refrigerator of Claim 10 or Claim 11 provided with.   The refrigerator according to claim 12, wherein the boundary plate is formed of two transparent plates sandwiching an air layer. The refrigerator according to claim 12 or 13, wherein the boundary plate has a heat passage rate of 1.9 W / m ² K or less. Adjacent to the upper side of the frozen storage room, a refrigerated storage room set in a refrigerated temperature zone,
With
The frozen storage room is formed so that the set temperature can be switched in the range of −22 ° C. to −7 ° C.,
The refrigerator according to any one of claims 1 to 14, wherein the first storage container and the second storage container are provided at a lowermost part of the refrigerated storage chamber.

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