JPH05196342A - Cold storage - Google Patents

Abstract

PURPOSE:To offer a cold storage which is able to effectively keep cooled air in a cold storage from flowing outside even when either of a take-out door or a take-in door is opened, so that the efficiency in cooling items such as beer mugs to be cooled can be improved. CONSTITUTION:When a take-out door 2 is opened to take items to be cooled out of a storage R of a heat-insulated box 1, a cooled air circulation fan 6 is kept spinning without stopping, so that an air curtain is formed at the front opening 1A, restraining cooled air from flowing outside. When take-in doors 3 and 4 are opened to take the items to be cooled into the storage R, a door switch detects the opened state of either the take-in door 3 or 4 and the cooled air circulating fan 6 is stopped based on the signal from the door switch, so that the generation of cooled air turbulent currents in the storage R is prevented and cooled air is restrained from flowing outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling storage such as a beer mug, and in particular, an opening / closing door for taking out and an opening / closing door for storing are arranged at a front opening and a rear opening of a storage main body,
The present invention relates to a cooling storage cabinet that can efficiently prevent the cool air in the storage cabinet body from flowing out to the outside even when any door is opened.

[0002]

2. Description of the Related Art Heretofore, various cooling storages of this kind have been proposed. In such conventional cooling storages, an opening / closing door for taking out which is attached to a front opening of a storage body and a storage for being attached to a rear opening. A detection switch is installed to detect the open / closed state of each open / close door, and if any of the open / close doors is opened, the cool air cooled by the cooler is based on the detection signal from the detection switch. By stopping the fan that circulates the cold air inside the storage, the cool air was prevented from flowing out of the storage.

Even with such a method, it is possible to suppress the outflow of cold air to some extent, but it is still insufficient. In particular, when the opening time of each door is long, the outflow of cold air out of the oven is remarkable. Therefore, there is a problem that the temperature inside the chamber is significantly increased.

[0004] In order to solve such a problem
In the publication No. 32844, a takeout door and a back door integrally formed with a ventilation passage are provided at front and rear portions of a case body, and a damper for opening and closing the ventilation passage in association with opening and closing of the back door is provided. , When taking out the object to be cooled by opening the take-out door, the ventilation passage is opened by the damper, and the cool air is circulated through the ventilation passage by the blower to form the cool air to the outside from the take-out door. In addition to suppressing the outflow, when opening the back door to store the object to be cooled in the case body, the ventilation passage is blocked by a damper, and the ventilation pipe is formed on the rear wall plate of the case body. There is described a refrigerating showcase in which cool air is circulated by a blower to prevent the cool air from flowing out from the back door.

[0005]

However, according to such a showcase, it is possible to prevent the cool air from flowing out from the inside of the case body when both the takeout door and the back door are opened. However, if the inside of the case body is cooled to a low temperature of 0 ° C. or less, the moisture in the cool air inside the case body is condensed and freezes, and as a result, the damper may not operate in conjunction with the opening and closing of the back door. was there.
When such a state is reached, cold air flows out to the outside each time the back door is opened and the object to be cooled is stored in the case body, and the temperature in the case body rises from this, which causes the object to be cooled. This will cause problems in refrigeration.

The present invention has been made in order to solve the above-mentioned problems of the prior art. Even if either the takeout door or the storage door is opened by a simple structure, the cold air in the storage is discharged to the outside. It is an object of the present invention to provide a cooling storage that can efficiently suppress the cooling and thus can improve the cooling efficiency of the object to be cooled such as a beer mug.

[0007]

In order to achieve the above-mentioned object, the present invention is for accommodating an object to be cooled and is provided with a front opening portion and a rear opening portion, and a front opening portion which can be opened and closed. A door for taking out, a storage door that is openably and closably attached to the rear opening, a cooler arranged in the heat-insulating box, and a cool air cooled by a cooler in the box. In a cooling storage provided with a circulating fan and a detection switch for detecting opening / closing of the storage door, the fan is configured to be stopped when the detection switch detects an open state of the storage door. ..

[0008]

In the present invention having the above structure, the object to be cooled stored in the heat insulating box is cooled by circulating the cool air cooled by the cooler in the heat insulating box through the fan. When the object to be cooled is stored in the heat insulating box, one of the plurality of storage doors is opened. When the storage door is thus opened, the detection switch detects the opened state of the storage door, and the rotation of the fan is stopped based on this detection signal. As a result, turbulent flow of cold air in the storage is suppressed as much as possible, and as a result, cold air is prevented from flowing out of the storage.

Since the detection switch is provided for each of the storage doors, no matter which storage door is opened, the rotation of the fan is detected based on the detection signal of the open state of the storage door by the detection switch. This means that the cold air is stopped and the cool air from the storage is prevented from flowing out.

When the object to be cooled is taken out from the storage, the take-out door is opened, but the rotation of the fan is not stopped at this time. As a result, the cool air is continuously circulated in the storage by the rotation of the fan, and as a result, an air curtain is formed by the flow of the cool air at the front opening of the heat insulation box to which the extraction door is attached. Become.
Therefore, even when the take-out door is opened by the air curtain formed in this way, it is possible to prevent the cool air in the storage from flowing out.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the drawings. First, the structure of the cooling storage according to the present embodiment will be described with reference to FIGS. 1 to 3. 1 is a front view of the cooling storage, FIG. 2 is a vertical sectional view of the cooling storage, and FIG. 3 is a horizontal sectional view of the cooling storage.

In these figures, the heat insulating box 1 is provided with a top wall plate 30A, a bottom wall plate 30B, and left and right side wall plates 30C and 30D, each having a heat insulating structure. A rear opening 1B is provided.
A take-out door 2 for taking out an object to be cooled such as a beer mug is attached to the front opening 1A so as to be openable and closable via a known hinge member. The take-out door 2 has a double glass structure having two glasses 2A and 2B so that the heat insulating property is improved and the object to be cooled in the heat insulating box 1 can be seen through from the outside.

Further, in the rear opening 1B, an upper storage door 3 and a lower storage door 4 which are opened and closed when the object to be cooled is stored in the heat insulating box 1 can be freely opened and closed through known hinge members. It is attached to the upper and lower two stages. Each of the storage doors 3 and 4 has a heat insulating structure in which the heat insulating materials 3B and 4B are incorporated, and is smaller than the take-out door 2 by about 1
It is divided into about two sizes. A partition member 9 is laterally provided between the side wall plates 30C and 30D of the heat insulating box 1 at a boundary position between the upper storage door 3 and the lower storage door 4.
Here, a storage unit R is formed which is hermetically sealed by the heat insulating box 1, the extraction door 2, the upper storage door 3 and the lower storage door 4.

Further, a cold air circulation duct 3A is attached to the inner surface of the upper storage door 3 facing the storage section R side of the heat insulating box 1, and likewise, the inner surface of the lower storage door 4 is also cooled. The circulation duct 4A is attached. A cold air circulation duct 9A is also attached to the partition member 9. These cold air circulation ducts 3A, 4A, and 9A are arranged so as to cooperate with each other in the rear opening 1B to form one cold air circulation path, and the cold air circulation fan 6 to be described later causes the cold air circulation duct 3 to When the cool air is circulated, the cool air is circulated through the ducts 3A, 4A and 9A.

In the side wall plate 30D of the heat insulating box 1, both doors 3 and 4 are located near the cold air circulation ducts 3A and 4A attached to the inner surfaces of the upper and lower storage doors 3 and 4, respectively.
A detection switch 20A for detecting the opening / closing of the lower storage door 4 is provided inside (only the detection switch 20A for detecting the opening / closing of the upper storage door 3 is shown in FIG. 3).
Similarly, the detection switch 20A is internally provided in the side wall plate 30D).

The detection switch 20A has two storage doors 3 and 4 as shown in a control circuit diagram (see FIG. 5) described later.
When the doors are closed, the ON state is maintained, whereas when both storage doors 3 and 4 are opened, the OF is opened.
It becomes the F state.

A cooler 5 provided with a defrost thermostat Th2 is arranged at a central position of a lower portion of the upper wall plate 30A facing the storage section R side, and the cooler 5 is driven by a cooling device 10 described later. The inside of the storage section R is cooled. Here, the defrost thermostat Th2 is turned on at the set lower limit temperature TA or lower and turned off at the upper limit temperature TB or higher, and the defrost heater H1 provided under the cooler 5 is
ON-OFF control is performed.

Below the cooler 5, the cooling duct 1 is provided.
2 is provided, and an antifreezing heater H2 is attached on the cooling duct 12. The cooling duct 12 cooperates with a warm air inflow prevention plate 11 described later to cool the cold air circulation duct 3A.
The cold air blown out from the cooler 5 is efficiently fed into the cooler 5.

On the rear opening 1B side (right side in FIG. 2) of the cooler 5, there is housed a warm air inflow prevention plate 11 for preventing warm air from flowing into the storage section R from the outside. It is fixed to the upper wall plate 30A by bolts or the like near the door 3 for use. The warm air inflow prevention plate 11 includes the left and right side wall plates 30C,
It is arranged in a state of being in contact with both side wall plates 30C and 30D between 30D, and the lower end thereof is close to the cool air circulation duct 3A provided in the upper storage door 3. A cold air suction port 7 is formed between the warm air inflow prevention plate 11 and the cooler 5.

As a result, even when the upper storage door 3 is opened, the warm air inflow prevention plate 11 prevents warm air from flowing into the storage portion R from the outside as much as possible.
The cool air discharged from A is efficiently sent to the cooler 5 from the cool air suction port 7, and the temperature of the cooler 5 is prevented from rising rapidly. Further, the warm air inflow prevention plate 11 causes the user to touch the cooler 5 to cause frostbite, and the defrosting heater H1 and the freeze prevention heater H.
It also has the function of preventing burns from touching 2nd grade.

In the vicinity of the warm air inflow prevention plate 11, a storage section R
A thermostat Th1 for detecting the temperature of the cold air in the inside is provided, and this thermostat Th1 has a characteristic that it turns off below a set lower limit temperature T1 and turns on above the upper limit temperature T2, and will be described later according to the temperature of the cool air. The drive control of the cooling device 10 is performed.

Further, a cool air circulation fan 6 is arranged on the front opening 1A side (left side in FIG. 2) of the cooler 5. The cold air circulation fan 6 circulates the cool air sucked from the cold air suction port 7 and cooled by the cooler 5 in the storage section R as shown by an arrow in FIG.

That is, the cool air blown out from the cool air circulation fan 6 cools the objects to be cooled placed on the shelves 8 arranged in a plurality of stages in the storage section R, and then the ducts 3A,
4A, 9A upward from the cool air intake port 7 to the cooler 5
Is circulated to. Similarly, the cool air descends along the inner surface of the take-out door 2 and moves along the upper surface of the bottom wall plate 30B as indicated by the arrow in FIG. 2, and further, the cool air circulation ducts 4A, 9A, 3A. Rises while passing through the suction port 7
To the cooler 5.

At this time, when the cool air descends along the inner surface of the take-out door 2, an air curtain is formed over the entire front opening 1A, and such an air curtain is provided when the take-out door 2 is opened. However, it is formed while the cold air circulation fan 6 is rotating.

When the take-out door 2 is opened, a part of the cool air hitting the object to be cooled changes its wind direction and is directed toward the whole surface opening 1A. Since the wind speed of the cool air forming the curtain is higher, the cool air forming the air curtain is absorbed and the outflow from the storage section R to the outside is suppressed. It should be noted that most of the cool air that has hit the object to be cooled is passed through the cool air circulation ducts 4A, 9A, 3A to the cooler 5
Will be circulated toward.

A cooling device 10 for driving the cooler 5 is mounted on the upper wall plate 30A of the heat insulating box 1, and the cooling device 10 basically has a compressor 31 and a condenser 32. And a cooling fan 33 for cooling the condenser 32 by air to form a refrigeration cycle C as shown in FIG.

The refrigerating cycle C is known, and in FIG. 4, a condenser 32 is connected to the compressor 31, and an air cooling fan 33 is arranged in the vicinity of the condenser 32. A dryer 35 is connected to the condenser 32,
The refrigeration cycle C is formed by being connected to the cooler 5 via the capillary tube 34 and being returned from the cooler 5 to the compressor 31.

In the refrigeration cycle C thus formed, the vaporized refrigerant compressed by the compressor 31 is transferred to the condenser 32.
Is made into a liquefied refrigerant, dehumidified by a dryer 35, and then decompressed via a capillary tube 34. The thus liquefied refrigerant is evaporated and vaporized by the evaporator in the cooler 5, whereby the cooler 5 is cooled and the storage part R of the heat insulating box 1 is cooled. After that, the evaporated and vaporized refrigerant is returned to the compressor 31.

Next, the control circuit of the cooling storage according to this embodiment will be described with reference to FIG. FIG. 5 shows a control circuit diagram. From the AC power source E, the power supply line L
1, L2 has been extended. Both power supply lines L1 and L2
In between, the normally closed contact x1 of the relay X1 and the thermostat T
A compressor 31 is connected via h1. A fan motor FM1 of the air cooling fan 33 is connected in parallel with the compressor 31.

A cam timer TM having a movable switch S and a timer driving motor M is connected between the two power supply lines L1 and L2. The movable switch S is driven by the timer driving motor M and has a fixed contact. a-
c and ab are selectively connected. The cam timer TM connects between the fixed contacts a and c during a predetermined time set by the timer during cooling by the cooler 5, and between the fixed contacts a and b during a predetermined time set separately during defrosting. Is to connect. The fixed contact c is connected to the power supply line L2.

Between the fixed contact a and the power supply line L1, there are two detection switches 20A corresponding to the upper storage door 3 and the lower storage door 4, respectively, and a fan motor FM2 for rotating the cold air circulation fan 6. Are connected in series.
A relay X1 is connected between the fixed contact b and the power supply line L1, and the timer drive motor M is connected to the power supply line L2 from the power supply line L1 through the normally closed contact x2 of the relay X2. Has been done.

Further, the normally open contact x1 'of the relay X1, the defrosting thermostat Th2, the overheating thermostat Th3 and the defrosting heater H1 are provided between the two power supply lines L1 and L2.
Are connected in series. Also, both thermostat Th
A relay X2 is connected in parallel with the defrost heater H1 to the power supply line L2 from the connection point between 2 and Th3. Here, the overheating thermostat Th3 is for preventing the overheating of the defrosting heater H1.

An antifreezing heater H2 and a dew condensation preventing heater H3 are connected in parallel with each other between both power supply lines L1 and L2, and the heaters H2 and H3 are turned on by a control circuit when defrosting. It is driven while the voltage is supplied from E, so that the cooling duct 12 is prevented from freezing and condensation.
A fuse F is connected to the power supply line L1.

Subsequently, the operation of the control circuit configured as described above will be described. First, when the power of the cooling storage is turned on, the power is supplied via the AC power supply E between the power supply lines L1 and L2. At this time, since the temperature of the thermostat Th1 is normally high in the storage section R (T2 or more), it remains in the ON state, and the cam timer TM
In, the movable switch S connects the fixed contacts a and c via the timer drive motor M for a predetermined time.

Therefore, the fan motor FM1 of the compressor 31 and the air cooling fan 33 has a normally closed contact x1 and a thermostat T.
It is driven by being connected between both power supply lines L1 and L2 via h1. Thereby, the cooler 5 is operated and the air in the storage R is cooled. When such a cooling operation is continued, the temperature in the storage section R decreases, and when the temperature becomes equal to or lower than the predetermined temperature T1, the thermostat Th1 turns off. Therefore, the compressor 31
Also, the driving of the fan motor FM1 is stopped and the cooling operation is stopped.

On the other hand, when the temperature in the storage section R rises to reach a temperature of T2 or higher, the thermostat Th1 is turned on, whereby the cooling operation by the cooler 5 via the compressor 31 is performed again. In this way, the temperature of the storage part R of the heat insulating box 1 is maintained between T1 and T2.

Since the fan motor FM2 is connected between the two power supply lines L1 and L2 by the two detection switches 20A and the movable switch S, the cold air circulation fan 6 is rotationally driven and cooled by the cooler 5. Cool air is circulated in the storage R. As a result, the object to be cooled placed on the shelf 8 is cooled.

When one of the upper and lower storage doors 3 and 4 is opened in this state, one of the detection switches 20A is turned off and the cold air circulation operation by the cold air circulation fan 6 is stopped. Therefore, even when the storage door 3 or 4 is opened and the object to be cooled is stored in the storage R, the turbulent flow is suppressed as much as possible and the cool air in the storage R flows out. There are few things. Further, since the two detection switches 20A are connected in series with each other, when one of the storage doors is opened, the circulation operation of the cool air is stopped as described above, so that the cool air flows out to the outside. Can be efficiently suppressed.

On the other hand, even if the take-out door 2 is opened in such a state, the fan motor FM2 is not stopped, and therefore the cold air circulation operation by the cold air circulation fan 6 is continuously performed. As a result, since the air curtain is formed in the entire opening 1A as described above even when the take-out door 2 is opened,
The cold air in the storage section R rarely flows out.

Next, during defrosting, the movable switch S of the cam timer TM is fixed by the timer drive motor M to the fixed contacts bc.
The state is maintained during defrosting. As a result, the relay X1 is excited, so that the normally closed contact x1 is turned off and the cooling operation by the compressor 31 and the cooler 5 is stopped. Further, the cooling air circulation operation by the cooling air circulation fan 6 is also stopped.

On the other hand, the normally open contact x1 'is turned on in accordance with the excitation of the relay X1, and the defrosting thermostat Th2 is turned on at the lower limit temperature TA or less at this time, and the excessive rise prevention thermostat Th3 is also turned on. Therefore, the defrost heater H1 is driven to defrost. At the time of defrosting, since the relay X2 is excited, the normally closed contact x2 is turned off.

The thermostat Th2 is turned off when the temperature exceeds the upper limit temperature TB and the defrosting operation is stopped. Such a defrosting operation is performed for a predetermined time set in the cam timer TM, and when the defrosting operation is completed, the movable switch S of the cam timer TM is switched to the fixed contact a-c side to restart the cooling operation. It

As described in detail above, in the cooling storage according to this embodiment, when the object to be cooled is taken out from the storage R of the heat-insulating box 1 by opening the take-out door 2, the cool air circulation fan 6 is used.
By continuing the rotation as it is without stopping the rotation, the air curtain can be formed in the front opening 1A to minimize the outflow of cold air to the outside, and the storage doors 3 and 4 are opened for storage. When the object to be cooled is stored in the portion R, the open state of either one of the storage doors 3 and 4 is detected by the detection switch 20A, and the rotation of the cool air circulation fan 6 is stopped based on the detection signal. Storage R
It is possible to prevent the turbulent flow of the cool air from occurring inside and to prevent the cool air from flowing out.

As a result, the take-out door 2 and the storage door 3,
Regardless of which of the four is opened, it is possible to suppress the outflow of cold air from the inside of the storage section R, and therefore it is possible to efficiently cool the object to be cooled without raising the temperature of the object to be cooled.

Further, as described above, in addition to being able to suppress the outflow of the cold air in the storage section R to the outside, the warm air inflow prevention plate 11 efficiently prevents the outside warm air from flowing into the storage section R. Therefore, the temperature of the cooler 5 does not rise sharply, and the heat load on the cooling device 10 can be reduced to save energy. Further, in the present embodiment, since it is not necessary to use a damper unlike the conventional device, even if the temperature in the storage section R is lowered to the freezing temperature, the object to be cooled can be cooled without any trouble.

The present invention is not limited to the above embodiments, and various modifications and improvements can be made without departing from the gist of the present invention. For example, it goes without saying that the air curtain may be formed along the rear opening 1B to which the storage doors 3 and 4 are attached.

[0047]

As described above, according to the present invention, even if either the takeout door or the storage door is opened, the cool air in the storage can be efficiently prevented from flowing out due to the simple structure. Therefore, it is possible to provide a cooling storage that can improve the cooling efficiency of an object to be cooled, such as a beer mug, and the industrial effect thereof is great.

[Brief description of drawings]

FIG. 1 is a front view of a cooling storage cabinet.

FIG. 2 is a vertical sectional view of a cooling storage.

FIG. 3 is a cross-sectional view of a cold store.

FIG. 4 is an explanatory view schematically showing a refrigeration cycle of a cooling storage.

FIG. 5 is a control circuit diagram of a cooling storage.

[Explanation of symbols]

 1 Insulation Box 1A Front Opening 1B Rear Opening 2 Extraction Door 3, 4 Storage Door 5 Cooler 6 Cold Air Circulation Fan 10 Cooling Device 20A Detection Switch

Claims (1)

[Claims] 1. A heat-insulating box for accommodating an object to be cooled and having a front opening and a rear opening, an extraction door rotatably attached to the front opening, and an opening and closing for the rear opening. A storage door that can be attached, a cooler that is disposed inside the heat-insulating box, a fan that circulates the cool air cooled by the cooler inside the box, and a detection that detects the opening and closing of the storage door. A cooling store with a switch, wherein the fan is stopped when the detection switch detects the opened state of the storage door.