JPH05141850A - Freezer-refrigerator - Google Patents

Abstract

PURPOSE:To prevent foods from drying and keep them fresh by providing a water receptacle to hold water from defrosting and a porous water-absorptive plate to form the rear wall of a closed cold chamber, said water receptacle positioned at the rear of and under a cold box and said porous water-absorptive plate having its lower edge facing the water receptacle. CONSTITUTION:In a freezer-refrigerator, there are provided a cold box 9 and a chilled case 7; said cold box 9 is placed directly under a median partition wall 4, which separates the cold-storage chamber 3 from the freezer 2, and forms a closed cold chamber 5 inside; said chilled case 7 is housed inside the closed cold chamber 5 and designed to be slid back and forth therein and cooled in an envelope of chilled air from a cooler 12. At the rear of and under the cold box 9 in such a freezer-refrigerator there is provided a water receptacle 24 to hold water from defrosting and the rear wall of the closed cold chamber 5 is formed of a porous water-absorptive plate which has its lower edge facing the water receptacle 26. In this constitution, the water-absorptive plate takes up the water from the defrosting in the water receptacle 26 and vaporizes it into the closed cold chamber 5 so that the temperature therein is kept relatively high and foods are prevented from drying and hence keep fresh.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to means for humidifying a low temperature chamber in a refrigerator having a closed low temperature chamber for indirectly cooling by providing a cooling air passage on the outer peripheral surface.

[0002]

11 and 12 show, for example, Japanese Patent Application No. 3-514.
[Fig. 71] Fig. 71 is a cross-sectional view showing a conventional refrigerator-freezer shown in the specification No. 71, in which 1 is a refrigerator-freezer body, 2 is a freezer compartment,
Reference numeral 3 is a refrigerating room, which is insulated by a partition wall 4. 5 is a low temperature room formed at the top of the refrigerating room, 7 is housed in a closed low temperature room 5 formed just below the middle partition wall 4, and the front part and the upper part which slides back and forth in it are released. A chilled case, 9 is a low temperature box which forms the closed low temperature chamber 5 therein and has an open upper part, 8 is a common lid for opening and closing the front part of the low temperature box and the front part of the chilled case 1, 1
Reference numeral 0 denotes a top cooling plate that closes the upper part of the chilled case 7, and the top cooling plate 10 is made of a porous material so as to retain the water vaporized from the food contained therein. 1
Reference numeral 1 denotes a cooling air passage for the chilled case, which is formed in the closed low temperature chamber 5 so as to be located between the top cooling plate 10 and the lower surface of the partition wall 4. From the cooler 12 to the cold storage chamber 3. A part of the cold air controlled by the damper thermostat 14 provided at the cold air discharge port 13a of the cold air supply passage 13 of FIG.
It flows along the top cooling plate 10 and is then discharged from the outer peripheral surface of the chilled case 7 through the cold air passage 16 on the outer bottom surface thereof into the refrigerating chamber 3 as shown in FIG. Reference numeral 17 denotes an in-compartment fan for forced circulation of cold air, which is arranged at the top of the cooler chamber (A).

Next, the operation will be described. That is, the cool air cooled by the cooler 12 is sent by the internal fan 17 and blown into the freezing compartment 2 to cool the freezing compartment 2. Then, a part of the cold air is guided to the cold air discharge port 13a through the cold air supply path 13 to the cold room 3, and the damper thermostat 14 provided therein controls the amount of the cold air to a predetermined temperature (3 ° C). ) Cool to. On the other hand, a part of the cold air flows to the upper surface of the top cooling plate 10 through the cold air supply path 15 for diverting, and then passes through the outer peripheral surface of the chilled case 7 and the cold air passage 16 on the outer bottom surface thereof to keep the low temperature chamber 5 at a predetermined temperature of 0. Refrigerate room 3
Is released into. Since the low temperature chamber 5 is a closed space in this way, the inside of the chilled case 7 is kept at a high humidity due to the evaporation of a small amount of water from the food, and a part of the evaporated water is a top surface of the porous material. Since it can be retained on the cooling plate, it prevents the dripping of dew when the water content is excessive, the decrease in humidity when the water content is too low, and prevents the food from drying and keeping it fresh when storing food that cannot be wrapped. You can

[0004]

In the conventional refrigerator-freezer, the temperature of the low temperature room is kept by the water vaporized from the food as a supply source, so that the humidity becomes low when the amount of food is small. Food tended to dry easily.

Further, in the conventional refrigerator, since the thawing box is kept at the temperature of the refrigerating room, foods such as meat and fish, which tend to lose its freshness, must be cooked and eaten promptly after thawing. If you thaw it in the meantime and leave it for a while, or forget to use it, the freshness may drop significantly. In addition, the water in the water container had to be added each time, which was troublesome and could be easily forgotten, so it could not be expected to be effective.

Further, in the conventional refrigerator-freezer, in order to cool the low temperature chamber as described above, cold air cooled by the cooler, dehumidified and dried flows into the low temperature chamber, and the upper part of the low temperature box is opened. , The humidity inside is low, the food inside is easy to dry, and if you don't wrap meat or fish with wrap, the surface will dry and the freshness will drop. In addition, foods that are difficult to wrap have problems such as being difficult to prevent from drying.

The present invention has been made in order to solve the above-mentioned problems, and keeps the humidity higher regardless of the amount of food in the chilled case and keeps the freshness for a long time after thawing. The objective is to obtain a freezer-refrigerator that can be uniformly thawed at high humidity without replenishing water, and that can maintain low temperature and high humidity so that food does not dry in the low temperature room and keeps freshness. ..

[0008]

A refrigerating refrigerator according to the present invention includes a low temperature box which is provided immediately below a partition wall which divides a freezing chamber and a refrigerating chamber and which forms a closed low temperature chamber, and the closed low temperature chamber. And a chilled case that slides in and out of the chilled case and cools the chilled case in a covered state with cold air generated by a cooler, provided in the lower portion of the low temperature box rear portion, and defrosted. A water reservoir for accumulating water is provided, and the rear wall of the closed low-temperature chamber is made of a porous water absorbent plate, and the lower end thereof faces the water reservoir.

[0009]

In the refrigerating refrigerator according to the present invention, the water absorbing plate sucks up the defrosted water in the water reservoir and evaporates the defrosted water in the closed low temperature chamber to keep the temperature high, whereby the food can be prevented from being dried and can be stored fresh.

[0010]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 and 2, 1 to 5 and 10 to 17 are the same as the conventional one. A chilled case 7 has a bottom surface 7a which is lower than a lower side 7b of the front opening. Reference numeral 18 denotes a shelf plate, which is provided with a plurality of ventilation holes 18a, and is used for the chilled case 7
It is placed on the stepped portion 7c around the bottom of the chilled case and keeps a distance from the bottom surface 7a of the chilled case. The lower part of the chilled case is covered with the bottom temperature box 9 and a cold air passage 16 is formed.

Next, the operation will be described. As in the conventional case, a part of the cool air controlled by the damper thermostat 14 flows to the upper surface of the top surface cooling plate 10 through the diversion cold air supply passage 15, and then to the outer peripheral surface of the chilled case 7 and the cold air passage 16 on the outer bottom surface thereof. After that, the low temperature chamber 5 is cooled to a predetermined temperature of 0 ° C. during this period and is discharged into the refrigerating chamber 3. When water is poured into the bottom of the chilled case 7, the moisture evaporates into the low temperature chamber 5 through the ventilation holes 18a of the shelf 18, and is adsorbed by the top cooling plate 10 together with the moisture which increases the humidity and evaporates from the food. .. Since the humidity in the low greenhouse 5 is maintained by evaporation of both the water at the bottom of the chilled case 7 and the water in the food, it can be maintained higher than before. The effect can be obtained by injecting water when the amount of food or food that is desired to avoid drying is small. It should be noted that it is optional to increase the evaporation effect by enlarging the ventilation holes 18a of the shelf plate 18 to form a drainboard shape or a net shape.

Example 2. Next, a second embodiment of the present invention will be described with reference to FIG. In this case, since the lower surface of the low temperature box 9 is opened and the lower surface 7a of the chilled case 7 is exposed to the refrigerating chamber 3, the injected water is slightly higher than the air temperature in the low temperature chamber 5. Therefore, the evaporation of water increases,
It is possible to maintain higher humidity. If the bottom of the chilled case 7 or the shelf 18 is made of a transparent material, the presence or absence of water inside can be confirmed.

Embodiment 3. 4 to 7 show Embodiment 3 of the present invention.
FIG. 7 is a cross-sectional view showing a chilled case 7 housed in a closed low-temperature chamber 5 formed immediately below the partition wall 4 and having a front part and an upper part that are slidable back and forth in the chilled case. A low temperature box having an open upper part for forming a closed low temperature chamber 5 therein, a common lid 8 for opening and closing a front part of the low temperature box and a front part of the chilled case 7, and 10 an upper part of the chilled case 7. This is a top cooling plate that closes up the top cooling plate 10. The top cooling plate 10 is made of a porous material capable of retaining water. Reference numeral 11 is a cooling air passage of the chilled case 7 formed in the closed low temperature chamber 5 so as to be located between the top surface cooling plate 10 and the lower surface of the partition wall 4, and from the cooler 12 to the refrigerating chamber 3.
A part of the cold air controlled by the damper thermostat 14 provided at the cold air discharge port 13a of the inward cold air supply passage 13 passes through the diversion cold air supply passage 15 and enters the cooling air passage 11 to cool the top surface of the chilled case 7. Flow along board 10, then FIG.
As described above, the chilled case 7 is discharged into the refrigerating chamber 3 through the cold air passage 16 on the outer bottom surface of the chilled case 7. Reference numeral 17 is a cooling air circulation fan, 21 is a defrosting heater for a cooler, 22 is a dew receiving portion for receiving defrosting water, 23 is a dew removal pipe, and 24 is a concave portion at the lower part of the dew removal pipe 23 at the rear of the low temperature box 9. The drainage pipe 25 is provided at a position which is lower than the concave peripheral wall and which is not directly below the dew drain pipe 23.
Further, the rear wall 5a of the closed low-temperature chamber 5 has a porous water-absorbing layer 5b formed on the inner surface and a plastic layer 5c impermeable to water on the outer surface, and the lower end 5d is partially extended in a leg shape to form the water reservoir. It is located close to the bottom surface of 24.

Next, the operation will be described. That is, the cool air cooled by the cooler 12 is sent by the internal fan 17 and blown into the freezing compartment 2 to cool the freezing compartment. Then, a part of the cold air is guided to the cold air discharge port 13a through the cold air supply path 13 to the cold room 3, and the damper thermostat 14 provided therein controls the amount of the cold air to a predetermined temperature (3 ° C). ) Cool to. On the other hand, a part of the cold air flows to the upper surface of the top cooling plate 10 made of a porous material through the cold air supply passage 15 for diversion, and then passes through the outer peripheral surface of the chilled case 7 and the cold air passage 16 on the outer bottom surface of the refrigerating chamber. It is released within 3. In this way, the temperature of the inner bottom surface and the inner peripheral surface of the chilled case 7, which is the surface on which the built-in food is placed, is set to the lowest temperature because the surface of the top surface cooling plate through which the supply cold air first flows is the lowest temperature. The temperature should not be too low and thus the food in-house will not freeze. The closed low temperature chamber 5 and the front opening of the chilled case 7 inside the closed low temperature chamber 5 are closed by a common lid 8 to form a closed structure. Further, the cooler 12
When defrosting the defrosted water
The water up to the water level on the upper end surface of the drainage pipe 25 is accumulated in the water reservoir 24. This water immerses the lower end 5d of the rear wall 5a of the closed low-temperature chamber 5, is sucked up by the capillary phenomenon through the porous water-absorbing layer 5b, and the rear wall 5 in the closed low-temperature chamber 5 is absorbed.
This water that moistens a is evaporated little by little, the inside of the chilled case 7 is kept at a high humidity, and evaporation of water from the food is suppressed to keep the food fresh. Cool air flows on the back surface of the rear wall 5a, but the back surface is a layer 5c that does not allow water to permeate, so that moisture is not exposed to the cool air. Since the lower end 5d of the rear wall 5a is partially leg-shaped, the cool air can pass between the legs and circulate without hindrance. Further, since the top cooling plate 10 having the lowest temperature is made of a porous material capable of retaining moisture, the moisture evaporated inside can be retained in itself and dew condensation does not occur in other portions.

Example 4. In the third embodiment, the closed low temperature chamber 5
Although there is the cool air passage 16 behind the rear wall 5a, in the fourth embodiment, as shown in FIG. 8, in order to make the temperature of the rear wall 5a relatively high and facilitate the evaporation of water from the wall, porous water absorption is performed. The flexible plate 5b is directly attached to the rear wall of the low temperature box 9, and the lower end is immersed in the water reservoir. Cold air flows from the cold air passage 11 to the cold air passage 16 through the side surface to the chilled case 7. Further, heaters 26 and 27 are embedded in the lower surface of the water reservoir 24 and the rear wall surface of the low temperature box 9 to prevent water from freezing and promote evaporation of water.

Embodiment 5. Embodiment 5 of the present invention will be described below with reference to the drawings. In FIG. 9, 1 is a refrigerator main body, 2
Is a freezer, 3 is a refrigerating room, 12 is a cooler, and 17 is a blower. 4 is a partition wall, 9 is a low temperature box arranged at the upper part of the refrigerating compartment, and has a front opening / closing door 8 and a chilled case 7 inside.
Is stored. At the ceiling of the chilled case 7, there is a top cooling plate 10, which is made of a porous moisturizing material. An outlet duct 13 is provided from the upper rear portion of the cooler 12 to the rear portion of the low temperature box 9, and a damper thermostat 14 that senses the temperature inside the chilled case 7 to open and close is provided at the lower end opening thereof. Inside the middle partition wall 4, there is a middle partition duct 15 which connects the damper thermostat 14 part and the upper part of the low temperature box 9 to each other, and communicates with the outer peripheral air passages 16 surrounding the upper part and both sides of the chilled case 7. The end of the air passage 16 communicates with the refrigerator compartment 3. A water reservoir 24 is provided at the rear bottom of the low temperature box 9.
Therefore, the defrosting water guided by the drain pipe 23 is collected from the dew receiving portion 22 below the cooler 12. A porous water absorbing plate 28 is arranged so as to straddle the water reservoir 24 on the bottom surface of the low temperature box 9. At the rear of the low temperature box 9, there is a blower 29 for thawing operated by a switch (not shown), and from the outlet 30 of the rear wall of the chilled case 7 through the bottom air passage 16 between the bottom of the chilled case 7 and the bottom of the low temperature box 9, It forms the return air path. Reference numeral 25 is a drain hose that guides defrost water to the outside of the refrigerator.

Next, the operation will be described. The cool air blown from the cooler 12 by the blower 17 passes through the blowout duct 13, the damper thermostat 14, and the partitioning duct 15,
Along the top cooling plate 10, it flows to the outer peripheral air passage 16 and indirectly cools the inside of the chilled case 7 from the outside to keep the temperature around 0 ° C. The porous top cooling plate 10 releases moisture from the food or the like in the chilled case 7 and holds moisture in the chilled case 7.
Keep inside humidity high. The defrost water collects in the water reservoir 24, and the overflowed water is discharged to the outside of the refrigerator by the drain hose 25. The porous water absorbing plate 28 is immersed in the water reservoir and absorbs water, so that the whole body contains water. The thawing blower 29 is operated by a switch, operates for a predetermined time, and the wind circulates as indicated by the thick arrow.
The water evaporated from the porous water absorbing plate 28 is condensed on the entire surface of the frozen food to give heat of condensation, and uniformly thaws. It also prevents the drying of food, which is a disadvantage of the wind that increases thawing speed. Even after the thawing is finished and the thawing blower 29 is stopped, the water in the water reservoir 24 gradually evaporates and keeps the inside of the chilled case 7 at high humidity, so that the food is prevented from being dried without being wrapped one by one.

[0018]

As described above, according to the present invention, a low temperature box which is provided immediately below a partition wall which divides a freezing chamber and a refrigerating chamber and which forms a closed low temperature chamber, and the closed low temperature chamber are provided. In a freezer-refrigerator that is housed and has a chilled case that slides in and out of the chilled case, cools the chilled case in a covered state with cold air generated by a cooler, is provided below the low temperature box rear portion, and defrosted water is provided. A water reservoir for accumulating, the rear wall of the closed low temperature chamber is composed of a porous water absorbent plate,
Since the lower end is made to face the water reservoir, the water-absorbing plate absorbs the defrosting water in the water reservoir, evaporates in the closed low temperature chamber and keeps the temperature high to prevent the food from drying and keep it fresh. You can

[Brief description of drawings]

FIG. 1 is a side sectional view of a refrigerator-freezer according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the essential parts of the refrigerator-freezer according to the first embodiment of the present invention.

FIG. 3 is an enlarged sectional view of essential parts of a refrigerator-freezer according to a second embodiment of the present invention.

FIG. 4 is a side sectional view of a refrigerator-freezer according to a third embodiment of the present invention.

FIG. 5 is a side sectional view of a refrigerator-freezer according to a third embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of essential parts of a refrigerator-freezer according to a third embodiment of the present invention.

FIG. 7 is a sectional view taken along line AA of FIG. 6 of a refrigerator-freezer according to a third embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view of essential parts of a refrigerator-freezer according to a fourth embodiment of the present invention.

FIG. 9 is an enlarged sectional view of essential parts of a refrigerator-freezer according to a fifth embodiment of the present invention.

FIG. 10 is a front view of a main part of a refrigerator-freezer according to a fifth embodiment of the present invention.

FIG. 11 is a side sectional view of a conventional refrigerator-freezer.

FIG. 12 is an enlarged cross-sectional view of a main part of a conventional refrigerator-freezer.

[Explanation of symbols]

 1 Refrigerator main body 2 Freezing room 3 Refrigerating room 4 Middle partition wall 5 Closed low temperature room 5a Closed low temperature room back wall 7 Chilled case 9 Low temperature box 12 Cooler 24 Water reservoir

Claims (1)

[Claims] 1. A low temperature box which is provided directly below a partition wall which divides a freezing room and a refrigerating room and which forms a closed low temperature chamber, and a chilled box which is housed in the closed low temperature chamber and slides back and forth therein. In a refrigerating refrigerator that includes a case and cools the chilled case in a covered state by the cool air generated by a cooler, a cold water storage unit that is provided below the rear portion of the low temperature box and stores defrosting water, and the closed low temperature chamber A freezer-refrigerator in which the rear wall is made of a porous water-absorbing plate and the lower end of which faces the water reservoir.