JPH07198242A - Storing device - Google Patents

Abstract

PURPOSE:To enable a cooling control to be carried out to an icing point storing temperature corresponding to the kind of food under an indirect cooling system by a method wherein there are provided a duct member communicating from a rear surface side and a temperature control device for controlling a temperature within a case at the first cold air passage. CONSTITUTION:Each of independent first cold air passages 14, 15 and 16 is formed around a plurality of cases 8, 9 and 10. Since each of the first cold air passages is controlled independently by its corresponding temperature control device TC for its cold air feeding, an inside part of a case is kept at a high humidity. According to an indirect cooling system for controlling a feeding of cold air into the first cold air passage around the case, the cold air has a lower cooling capability than that of the refrigerant, so that a cooling capability per hour may become low and a varying speed of the temperature within the case becomes slow. In particular, since the temperature within the upper case is set to be lower than that of the lower case, it is possible to perform a long period cooling and storing of food.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage for maintaining the inside of a case at an ice storage temperature by an indirect cooling system.

[0002]

2. Description of the Related Art A conventional storage of this kind is disclosed in Japanese Utility Model Laid-Open No. 58-22678 as a freezing refrigerator. According to this publication, a storage chamber is formed in a refrigerating chamber that is normally cooled to + 3 ° C. to + 5 ° C., and the storing chamber is cooled to, for example, + 1 ° C. which is lower than the temperature of the refrigerating chamber so that the storage chamber is relatively decomposed. We try to store fast foods, but the shelf life of foods is still short. On the other hand, if the food is stored in a freezer (usually cooled to -20 ° C etc.) and frozen, long-term storage can be achieved, but it is not suitable for storing vegetables and fruits, and it is not suitable for cooking. It has a drawback that the flavor of the food is impaired due to thawing.

Therefore, recently, a method of storing food at ice storage temperature has been considered. This ice temperature storage temperature is a temperature zone below freezing but just before food freezes.By storing food at this temperature, the growth of bacteria can be suppressed, it can be stored for a relatively long period of time, and it is not frozen. It has the advantage that the flavor of the food is not compromised (where the food normally does not freeze at freezing due to the freezing point depression). However, since this ice temperature storage temperature generally differs depending on the type of food, such as vegetables, meat and fish, or fruits, when the storage room temperature is set to the ice temperature storage temperature of a certain type of food,
There is a risk that other types of food will freeze when stored.

On the other hand, in Japanese Utility Model Publication No. 49-92553, cold air cooled by a cooling device is introduced directly into a plurality of cooling chambers, and the cooling device is controlled based on the temperature of one cooling chamber. There is disclosed a refrigerator driving device. Further, Japanese Utility Model Laid-Open No. 53-46070 discloses a refrigerator in which an inner box is housed in an outer box and cold air passages are formed around the inner box to communicate with each other.

[0005]

Assuming that a storage is formed by simply combining these techniques, a plurality of inner boxes are housed in an outer box and cold air is communicated with each other around each inner box. It is possible to form a passage and introduce cold air cooled by a cooling device into this cold air passage to indirectly cool each inner box body, and to cool the temperature to + 1 ° C. or the like lower than the temperature of the refrigerating compartment. There is a storage room. However, the technical idea of maintaining a plurality of compartments at an ice temperature storage temperature corresponding to the type of food by an indirect cooling method, and a plurality of cooling controls to the ice temperature storage temperature corresponding to the type of food by an indirect cooling method The storage compartment having the compartment and the plurality of temperature control devices is not derived.

[0006] Therefore, an object of the present invention is to provide a storage having a plurality of compartments and a plurality of temperature control devices capable of performing cooling control to an ice temperature storage temperature corresponding to the type of food by an indirect cooling system.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a storage chamber for a heat-insulating box body constituted by an outer box, an inner box, and a heat insulating material filled between the inner and outer boxes, and a heat storage box provided in the storage chamber. A case having a plurality of upper openings made of a guide member, a first cool air passage formed around each case, and a cooling device such as a cooler and a blower provided at the bottom of the heat insulating box. In a storage room with a cooling chamber
A duct member is provided on the back of the heat insulating box in the vertical direction and has a lower end communicating with the rear of the cooling chamber and communicating with the first cold air passage from the back side, and provided for each case and detecting the temperature. A temperature control device for controlling the temperature inside the case by controlling the introduction of cold air into the first cold air passage corresponding to the case, and each temperature control device controls the temperature inside the case such as vegetables, meat and fish, or fruits. It is set at an ice storage temperature corresponding to the type of food, such that the upper case has a lower temperature than the lower case.

[0008]

Since the independent first cool air passages are formed around the plurality of cases, and the introduction of the cool air is independently controlled by the corresponding temperature control device for each of the first cool air passages, the first cool air passages are directly introduced into each case. The inside of the case is maintained at a high humidity as compared with a method of introducing cold air or a so-called direct cooling method in which a cooler is arranged in each case and is cooled directly by the cooler. Further, according to the indirect cooling method that controls the introduction of cold air into the first cold air passage around the case, since the cooling capacity of cold air is smaller than that of the refrigerant, the cooling capacity per hour is higher than that of the above two methods. It becomes smaller, the width of temperature change in the case becomes smaller, and the change speed becomes slower. In particular, since the temperature control device is set to the ice storage temperature corresponding to each type of food and the upper case has a lower temperature than the lower case, the above-described effect of the indirect cooling method is obtained. Combined with this, a food storage can be created in which the temperature of the food is kept in a high humidity in each case, and the ice storage temperature increases from top to bottom. As a result, the flavor of the stored food is not impaired, the food can be cooled and stored for a long period of time, and the storability of the food as a storage is improved.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a storage according to the present invention, FIG. 2 is a perspective view of the storage, and FIG. 3 is an electric circuit diagram for explaining a temperature control device for the storage.

Reference numeral 1 is a storage of the present invention. This storage 1
Is composed of a heat insulating box 2 and a heat insulating outer door 21 which will be described later.
Reference numeral 2 is composed of an outer box 3 which can be opened forward, an inner box 4 which is also incorporated in the outer box 3 with a space therebetween and also has a front opening, and a heat insulating material 5 which is filled between the inner and outer boxes 3 and 4. It is a heat-insulating box with a front opening.

The inner box 4 has a pair of upper and lower partition members 6 and 7 which are integrally bulged from the rear portion to the opening edge and form grooves that are open to both sides and rearward and are similarly filled with the heat insulating material 5. The inside of the inner box 4 (that is, inside the storage chamber)
Is divided into three rooms above and below. In the three compartments divided into the inner box 4, cases 8, 9 and 10 each having a front opening made of a heat conducting member such as aluminum are incorporated, and do not communicate with the insides of the cases 8, 9 and 10, respectively. Compartments 11, 12, 13 are formed.

The cases 8, 9 and 10 have a predetermined distance from the inner surface of the inner box 4 and the partition members 6 and 7, respectively, and the flanges of the opening edges are provided at the front portion of the inner box 4 and the partition members 6 and 7, respectively.
Is fixed in contact with the front part of the cold air passages 14, 15 and 16 as independent first cold air passages that do not communicate with the outside around the cases 8, 9 and 10, respectively.
Are formed. At the upper part of the rear surface of each cold air passage 14, 15, 16 corresponding to the upper end of the rear surface of each case 8, 9, 10.
Discharge ports 26, 27, 28 are provided respectively, and keep solenoid type electromagnetic dampers 39, 40, 41 as cold air control means for opening and closing the discharge ports 26, 27, 28 are arranged in the cool air passages corresponding to the back surfaces thereof. I am doing it. The cold air control means is not limited to the electromagnetic damper.

The front opening of each compartment 11, 12, 13 is
Each of the inner doors 17, 18 and 19 is made of a glass plate, a transparent synthetic resin plate or the like so as to be openable and closable, and the front opening of the heat insulating box 2 is pivotally movable by a hinge 20 at its opening edge. Pivoted outer door 2
It is opened and closed by 1. Reference numeral 22 denotes a gasket that is attached around the inner surface of the outer door 21 and is a sealing material that comes into close contact with the opening edge of the outer box 3 when the outer door 21 is closed.

A duct member 25 is attached so as to straddle the bottom wall and the back wall of the inner box 4. This duct member 25
Is a horizontal cooling chamber 23 in a portion corresponding to the bottom wall of the inner box.
And the lower end is in the cooling chamber 2 at the portion corresponding to the back wall of the inner box.
A cold air passage 24 is formed as a second cold air passage that communicates with the rear portion (rear end) 3 of the No. 3 and extends vertically. The cooling chamber 23 communicates with the bottom of the lowermost cool air passage 16 by an inlet 29 formed at the bottom front end of the inner box 4. Furthermore,
The cooling chamber 23 is provided with a return passage 33 having suction ports 30 and 31 formed at the bottoms of the cold air passages 14 and 15 and a discharge port 32 communicating with the inside of the cooling chamber 23 near the suction port 29. The uppermost cool air passage 14 and the middle cool air passage 15 communicate with the respective bottom portions.

A cooler 36 and a blower 37 for circulating cool air are housed in the cooling chamber 23, and the cooler 36 constitutes a part of a refrigerant cycle together with the electric compressor 35 and the like.
The cool air cooled by the cooler 36 is sent to the blower 37.
Is accelerated upwards along the duct member 25 by the discharge port 26, 27, 28 to the corresponding cool air passage 14, 15, 1
When the air is discharged into 6 and circulates through the cold air passages, the compartments 11, 12, and 13 are cooled (that is, indirectly) from the top, bottom, rear, and left and right side wall surfaces of the cases 8, 9, and 10. After cooling), a series of circulation cycles are performed in which the air is returned from the suction ports 30, 31, 29 at the bottom to the cooling chamber 23 via the return passages.

FIG. 3 is an electric circuit diagram for explaining the temperature control device (TC) of each compartment 11, 12, 13.
A, B, and C respectively indicate temperature control circuit units corresponding to the compartments 11, 12, and 13. 42 is a temperature detecting device that detects the temperature in the compartment 11 and the output changes in proportion to the detected temperature. The output end is connected to the + side input terminal and the − side input terminal of the comparators 44 and 45 via the amplifier 43. Each is entered. The temperature detecting device 4 is connected to the-side input terminal of the comparator 44.
The output terminal of the upper limit temperature setting circuit 46 for setting the upper limit temperature which is the first reference temperature with respect to the temperature detected in 2 is connected, and the + side input terminal of the comparator 45 is detected by the temperature detection device 42. The output terminal of the lower limit temperature setting circuit 47 for setting the lower limit temperature which is the second reference temperature for the set temperature is connected.

The output terminals of the comparators 44 and 45 are respectively connected to the set terminal S and the reset terminal R of the flip-flop 48, and the output Q of the flip-flop 48 is OR gate 7.
0 is input, and the coil 49A of the relay switch 49 is connected to the output terminal of the OR gate 70. The contact 49B of the relay switch 49 operates in the closing direction when the coil 49A is energized, and the contact 48B is connected in series to the parallel circuit of the motors 37M and 35M and the power supply. The output Q of the flip-flop 48 is
It is connected to the base of an NPN type transistor 54 via a differentiating circuit 53, and is also connected to the base of an NPN type transistor 57 via an inverter 55 and a differentiating circuit 56. The base of a PNP type transistor 58 is connected to the collector of this transistor 57. To be done. Transistors 54 and 58
The coil 39A of the electromagnetic damper 39 is connected between the collectors of the power source Vcc and the power source Vcc, and the power source VDD is connected to the emitter of the transistor 58 and the collector of the transistor 57. Note that the power supply VDD and the power supply VCC have a relationship of VDD> VCC, and as an example in which a current flows in the coil 39A in the direction of the solid arrow in FIG.
When the temperature detected in 2 is equal to or lower than the upper limit temperature (for example, −1 ° C.), the electromagnetic damper 39 operates to open the discharge port 26, and the current to the coil 39A in the direction of the broken line arrow in FIG. For example, when the temperature detected by the temperature detection device 42 is equal to or higher than the lower limit temperature (for example, −2 ° C.), the electromagnetic damper 39 operates to close the discharge port 26.

The upper limit temperature setting circuit 46 generates an output corresponding to the output of the amplifier 43 when the temperature of the compartment 11 is equal to or lower than the upper limit temperature (-1 ° C.), and the lower limit temperature setting circuit 47 outputs the temperature of the compartment 11. Is set to generate an output corresponding to the output of the amplifier 43 when the temperature is equal to or higher than the lower limit temperature (that is, −2 ° C.). The lower limit temperature) / 2, and in the embodiment, it is cooled to −1.5 ° C.]. This-1.
5 ° C. is an ice temperature storage temperature suitable for storing fruits such as apples.

B and C are compartments 12 and 13 respectively.
3 shows the temperature control circuit part corresponding to, and the same reference numeral as A in FIG. 3 indicates the same configuration. In B, 50 is a temperature detecting device for the compartment 12. Further, 51 is an upper limit temperature setting circuit, which generates an output corresponding to the output of the amplifier 43 when the detected temperature of the compartment 12 is equal to or lower than the upper limit temperature (for example, −0.5 ° C.), and the lower limit temperature setting circuit 52 Similarly, the temperature of the compartment 12 is set to generate an output corresponding to the output of the amplifier 43 when the temperature is equal to or higher than the lower limit temperature (for example, −1.5 ° C.), and the temperature detected by the temperature detection device 50 is When the temperature is below the upper limit temperature (that is, −0.5 ° C.),
A current flows in the direction of the solid line arrow in FIG. 3 with respect to the coil 40A, the electromagnetic damper 40 operates to open the discharge port 27, and the temperature detected by the temperature detection device 50 is the lower limit temperature (that is, −1.5 ° C.). In the above case, a current flows through the coil 40A in the direction of the broken line arrow in FIG. 3, and the electromagnetic damper 40 operates to close the discharge port 27. By setting the upper and lower limit temperatures, the compartment 12 is cooled to its average temperature [−1.0 ° C. in this example]. This-
1.0 ° C. is an ice temperature storage temperature suitable for storing meat and fresh fish.

Similarly, in C, 60 is a temperature detecting device for the compartment 13. Further, 61 is an upper limit temperature setting circuit, which generates an output corresponding to the output of the amplifier 43 when the detected temperature of the compartment 13 is equal to or lower than the upper limit temperature (for example, 0 ° C.),
The lower limit temperature setting circuit 62 is similarly set so as to generate an output corresponding to the output of the amplifier 43 when the temperature of the compartment 13 is equal to or higher than the lower limit temperature (for example, −1.0 ° C.), and the temperature detecting device 60. The temperature detected at is the upper limit temperature (ie 0
C.) or less, a current flows through the coil 41A in the direction of the solid line arrow in FIG. 3, the electromagnetic damper 41 operates to open the discharge port 28, and the temperature detected by the temperature detection device 60 is When the temperature is equal to or higher than the lower limit temperature (that is, -1.0 ° C), a current flows through the coil 41A in the direction of the broken arrow in Fig. 3, and the electromagnetic damper 41 operates to close the discharge port 28. . By setting the upper and lower limit temperatures, the compartment 13 has its average temperature [−0.5 ° C. in this example].
To be cooled. This −0.5 ° C. is an ice temperature storage temperature suitable for storing vegetables.

Thus, the compartment 11 is divided into the fruit compartment and the compartment 1
2 is displayed as a meat and fish room, and compartment 13 as a vegetable room.
By separately storing fruits, meat, fish, and vegetables in each compartment, the food stored in each compartment can be stored for a long time without being frozen. In addition, when any one of the electromagnetic dampers 39, 40, 41 is opened in the embodiment, a so-called cooling operation is performed in which electric circuit components including the electric compressor motor 35M and the blower motor 37M operate to operate the cooling device. Therefore, there is no problem of insufficient cooling in each compartment.

According to the above configuration, the independent first cool air passages are formed around the plurality of cases,
Since the introduction of cold air is controlled independently for each first cold air passage by the corresponding temperature control device, a method of directly introducing cold air into each case or a cooler placed in each case to cool with the direct cooler As compared with the so-called direct cooling system, the inside of the case is maintained at high humidity. Further, according to the indirect cooling method that controls the introduction of cold air into the first cold air passage around the case, since the cooling capacity of cold air is smaller than that of the refrigerant, the cooling capacity per hour is higher than that of the above two methods. It becomes smaller, the width of temperature change in the case becomes smaller, and the change speed becomes slower. In particular, since the temperature control device is set to the ice storage temperature corresponding to each type of food and the upper case has a lower temperature than the lower case, the above-described effect of the indirect cooling method is obtained. Combined with this, a food storage can be created in which the temperature of the food is kept in a high humidity in each case, and the ice storage temperature increases from top to bottom. As a result, the flavor of the stored food is not impaired, the food can be cooled and stored for a long period of time, and the storability of the food as a storage is improved.

[0023]

According to the first aspect, independent first cool air passages are formed around a plurality of cases, and the first cool air passages independently control the introduction of cold air by a corresponding temperature control device. Since the cooling capacity of cold air is smaller than that of the refrigerant, the cooling capacity per unit time is smaller than that of the direct cooling method or the method of directly introducing cold air, and the width of the temperature change in the case is small and the rate of change is small. Becomes slow. In particular, the temperature control devices are set so that the upper case has a lower ice storage temperature than the lower case, and the temperature control device is set to the ice storage temperature corresponding to the type of food. In addition, in each case, a food can be maintained at a temperature where the food is not frozen and in a high humidity state, and the ice temperature storage temperature becomes higher in order from top to bottom. As a result, the flavor of the stored food is not impaired, the food can be cooled and stored for a long period of time, and the storability of the food as a storage is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a storage according to the present invention.

FIG. 2 is a perspective view of a storage.

FIG. 3 is an electric circuit diagram for explaining a temperature control device for a storage.

[Explanation of symbols]

 1 Storage 2 Insulation Box 11 Fruit Room (compartment) 12 Meat and Fish Room (compartment) 13 Vegetable Room (compartment) 14 Cold Air Passage 15 Cold Air Passage 16 Cold Air Passage 23 Cooling Room 25 Duct Member 36 Cooler 37 Blower TC Temperature Control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Matsumoto 180 Sakata, Oizumi-cho, Ora-gun, Gunma Prefecture Kyosanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. An outer box, an inner box, and a storage chamber of a heat-insulating box constituted by a heat insulating material filled between the inner and outer boxes, and a plurality of heat-conducting members provided in the storage chamber. A storage including a case having an upper surface opening, a first cool air passage formed around each case, and a cooling chamber provided at the bottom of the heat insulating box and storing a cooling device such as a cooler and a blower. A duct member which is provided in the back portion of the heat insulating box in the vertical direction and has a lower end communicating with the rear portion of the cooling chamber and communicating with the first cold air passage from the rear side; And a temperature control device for controlling the temperature in this case by controlling the introduction of cold air into the first cold air passage corresponding to the detected case, each temperature control device, the temperature in the case vegetables, meat and fish, Or food such as fruits The storage case is characterized in that the upper case is set to have a lower ice temperature storage temperature than the lower case.