JP2567752B2 - Cold storage - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage such as a low temperature showcase or a refrigerator, and indirectly cools a storage chamber defined by a heat conducting box arranged inside a heat insulating box. It relates to a cold store.

[0002]

2. Description of the Related Art As a conventional technique, Japanese Utility Model Application Laid-Open No. 60-9388 has been proposed.
In JP-A-2, the heat-insulated outer box and the heat-conducting inner box are fixedly mounted in a fixed space, and cool air is circulated through the space between the outer box and the inner box to cool the inner box. The inside is a refrigeration room, and a refrigerator that indirectly cools the refrigeration room by placing an evaporator of a refrigerator to create cool air and a fan to circulate the cool air in the cool air circulation space between the outer box and the inner box. It has been disclosed.

[0003]

Such a prior art refrigerator is suitable for storing wine, fresh flowers and fresh food products, since the relative humidity in the storage room is kept considerably high due to the indirect cooling system. In recent years, it has spread rapidly.

[0004] However, in the case where wine does not have a transpiration itself, such as wine, or the door does not open and close even if it has a transpiration itself, such as fresh food, the humidity in the refrigerator compartment is increased to a high level. There was a problem that it could not be maintained and the quality was lowered.

In view of the above problems of the prior art, the present invention provides a cooling storage for the purpose of preventing the humidity in the storage chamber from decreasing and controlling it to a predetermined humidity.

[0006]

According to the present invention, a heat-conducting box is arranged inside a heat-insulating box body having an opening / closing door at a front opening thereof with a space from the heat-insulating box body. With the inner side of the guide box as a storage chamber, the evaporator and the cool air circulation blower are arranged in the cool air passage between the heat insulating box body and the heat conducting box, and in the cooling storage configured to indirectly cool the storage chamber, A humidity sensor for detecting the humidity of the storage room is provided in the storage room, and an intake port that communicates the outside with the storage room is formed in the heat insulating box body, and a high pressure part and the outside of the cold air passage are provided. An air vent communicating with the storage chamber and the low-pressure portion of the cold air passage is formed in the heat conducting box, and the humidity sensor is provided at a predetermined position at the exhaust port. It constitutes a cooling storage with an opening / closing means for closing the exhaust port when the humidity of the air is detected. .

Further, according to the present invention, a heat-conducting box is arranged inside the heat-insulating box having an opening / closing door at the front opening and spaced from the heat-insulating box. With a storage chamber, the evaporator and the cool air circulation blower are provided in the cold air passage between the heat-insulating box and the heat-conducting box, and in the cooling storage configured to indirectly cool the storage chamber, An internal temperature sensor is disposed, an external temperature sensor is disposed outside the heat insulating box, and the heat insulating box is formed with an intake port that communicates the outside with the storage chamber. Forming an exhaust port that communicates the high pressure part of the cold air passage and the outside, the heat conducting box,
An air vent communicating with the storage chamber and the low-pressure part of the cold air passage is formed, and an opening / closing means for closing the air vent is provided at the exhaust port when the outside air temperature AT−the set temperature T ≦ 0. It constitutes a cooling storage.

[0008]

According to the present invention, external air (hereinafter simply referred to as "outside air") is forcibly introduced into the storage room from the intake port by the cool air circulating blower, and the air in the storage room enters the cool air passage through the ventilation port. It will be discharged from the exhaust port. The humidifying effect is generated by such forced introduction of the outside air. Then, when the humidity of the storage chamber reaches a predetermined humidity, the opening / closing means closes the exhaust port, and as a result, the humidity of the storage chamber is controlled to the predetermined humidity.

Further, according to the present invention, when the outside air temperature AT-the inside set temperature T≤0, the opening / closing means closes the exhaust port, whereby the humidity in the storage chamber is prevented from lowering.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cooling storage according to the present invention will be described below with reference to the drawings using a reach-in type low temperature case as an example. Fig. 1 is a vertical side view of a low temperature showcase, and Fig. 2 is a low temperature show.
Fig. 3 is a vertical sectional front view of the case, Fig. 3 is a perspective view of a main part of the low temperature show with a part thereof cut away, Fig. 4 is an overall perspective view of the low temperature show, and Fig. 5 is the electrical system of claim 1. Circuit diagram, FIG. 6 shows an electric circuit diagram of claim 2.

Reference numeral 1 denotes a heat-insulating box body provided with a double-door type opening / closing door 2 in the front opening, and inside the heat-insulating box body 1, for example, a good heat of the front opening made of a thin iron plate coated. The guide box 3 is fixedly installed at a distance from the inner wall surface of the heat insulating box 1. The heat conduction box 3 is constituted by a top plate 3A, both side plates 3B, a rear plate 3D, and a detachable and removable bottom plate 3E, and is formed between the heat insulating box 1 and the heat conduction box 3. The substantially closed space to be used is a cold air passage 4 and the space inside the heat conduction box 3 is a storage room 5 for storing bottled beverages, fresh foods, and fresh flowers. In the embodiment, a plurality of shelves 7 on which wines 6 are placed are detachably provided in the storage room 5. On the other hand, in a machine room 8 formed below the heat-insulating box 1, an electric compressor 9, a condenser 10, a blower 11, and the like of a refrigeration system are arranged.

Further, the heat insulating box 1 and the rear plate 3D of the heat conducting box 3
The electric compressor 9 and the condenser 10
An evaporator 12 constituting a refrigeration system is disposed together with the above, two cool air circulation blowers 13 are disposed above the evaporator 12, and a defrost water guide plate 14 is dropped below the evaporator 12 from the defrost water guide plate 14. A drain receiver 16 and a drain pipe 17 for collecting defrost water to be collected and leading to a water tray 15 disposed on the lower surface of the bottom plate 3E are provided. The water tray 15 has a large number of humidifying holes 1 formed in the bottom plate 3E.
The dehydration water from the evaporator 12 is used for supplying water to the water tray 15 through communication with the storage room 5 via 8.

In addition, a plurality of intake ports 19 that communicate the outside with the storage chamber 5 are formed in the ceiling wall 1A of the heat insulating box 1, and a plurality of high pressure portions 4A of the cold air passage 4 communicate with the outside. The exhaust port 20 is formed, and in the front part of the bottom plate 3E of the heat conducting box 3,
A plurality of vents 21 communicating the low pressure part 4B of the cold air passage 4 and the storage room 5 are formed, and a front part of the top plate 3A of the heat conduction box 3 is
A plurality of discharge holes 22 are formed to communicate the high pressure section 4A of the cool air passage 4 with the storage chamber 5.

Further, on the ceiling wall 1A of the heat insulating box 1, there is provided an opening / closing means 24 for opening / closing the exhaust port 20 based on a signal from the humidity sensor 23 arranged in the storage chamber 5. The opening / closing means 24 is a case 24 for covering the exhaust port 20.
A, an opening 24B formed on the back surface of the case 24A, an opening / closing plate 24C for opening / closing the opening 24B, the opening / closing plate 24C
It is constituted by a solenoid device 24D as a drive source for driving the. In addition, as the drive source of the opening / closing plate 24C, an air pressure using an electric motor or a blower may be used instead. Further, the exhaust port 20 may be directly opened and closed.

Further, on both sides of the front surface of the storage room 5, there are fluorescent lamps 2 for indoor lighting which are surrounded by fluorescent lamp shades 25.
6 are installed vertically. This fluorescent lamp shade 25 has an upper opening 27 and a lower opening 2 which communicate with the cool air passage 4 at the lower and upper ends.
8 is formed, and a part of the circulating cold air is passed through the shade 25 to prevent the temperature rise in the room.

In the above-mentioned structure, the cold air that has been heat-exchanged in the evaporator 12 is cooled by the cold air circulation blower 13 in the cold air passage 4
Is circulated as indicated by an arrow A to cool the heat conduction box 3. Thereby, the air in the storage room 5 is indirectly cooled through the heat conduction box 3. Such an indirect cooling method for the storage room 5 is one of the requirements for maintaining the storage room 5 at a high humidity, but when storing food or drink that does not release water itself, such as wine 6 or Western confectionery, Even if it is a perishable food product that diverges, the humidity in the storage room 5 tends to decrease if the opening and closing of the door 2 is small. Therefore, the defrosting water collected in the water tray 15 humidifies the storage chamber 5 to prevent the humidity in the storage chamber 5 from decreasing. However, such a humidifying effect is not sufficient because only a rise in humidity of about 5% can be expected.

Therefore, according to the first aspect of the present invention, when the humidity of the storage chamber 5 is, for example, 70% or less, the control circuit 29 shown in FIG.
Closes switch 30. Then, the solenoid device 2
Since it is excited by 4D, the opening / closing plate 24C opens the opening 24B.

Therefore, the outside air is forcibly introduced into the storage chamber 5 from the intake port 19 by the cool air circulation blower 13 as shown by the arrow B, and the air in the storage chamber 5 passes through the ventilation port 21 and the cold air passage 4 as shown by the arrow C. Then, it is discharged from the exhaust port 20 as indicated by arrow D. Due to such forced introduction of the outside air, the humidifying effect of the storage chamber 5 is generated. At the same time, storage room 5
It is possible to exhaust ethylene gas and carbon dioxide gas inside.

When the humidity of the storage chamber 5 reaches, for example, 75%, the control circuit 29 opens the switch 30 by the signal from the humidity sensor-23. Then, the solenoid device 24D is de-excited and the opening / closing plate 24C is opened.
Block 4B. As a result, the forced introduction of outside air is eliminated, and the storage chamber 5 becomes a predetermined humidity. Storage room 5 again
When the humidity of the air drops to 70%, the opening 24B is opened based on the signal from the humidity sensor 23, and the storage chamber 5 is humidified as described above. The exhaust port 20 is controlled to be opened and closed as described above. Due to
The humidity of the storage room 5 is maintained in a substantially predetermined range.

Further, since a part of the cool air circulated in the cool air passage 4 is introduced into the storage chamber 5 through the discharge small holes 22, a slight air circulation occurs in the storage chamber 5, and the storage chamber 5 5
Temperature variation can be reduced.

Next, the invention of claim 2 will be described.
Note that the description of the same parts as in claim 1 will be omitted.
According to the second aspect of the present invention, the humidity condition of the storage chamber 5 is indirectly detected to control the opening / closing means 24. As shown in FIG. 6, the inside temperature sensor-31 and the outside temperature sensor-32 are provided. The control circuit 29 is provided so that the outside air temperature AT-the internal set temperature T≤0.
When the judgment is made, the control circuit 29 opens the switch 30. Then, the solenoid device 24D is de-excited and the opening / closing plate 24C closes the opening 24B. As a result, the opening / closing means 24 closes the exhaust port 20. This makes it possible to suppress a decrease in humidity. That is, when the outside air temperature AT is lower than the set temperature T in the refrigerator, the humidifying effect does not occur, and the humidity of the storage chamber 5 decreases.

The detection values of the inside temperature sensor 31 and the outside temperature sensor 32 are input to the control circuit 29, and the control circuit 29 controls the opening and closing of the switch 30. It is also possible to connect a so-called differential temperature thermostat to control the opening / closing means 24.

[0023]

In the cooling storage according to the present invention, the outside air can be forcibly introduced into the storage chamber from the intake port using the cool air circulation blower, so that the humidifying effect of the storage chamber occurs.
It is possible to reliably prevent the humidity in the storage chamber from decreasing, and when the humidity in the storage chamber reaches a predetermined humidity due to the introduction of outside air, the opening / closing means closes the exhaust port, and as a result, the humidity in the storage chamber is controlled to the predetermined humidity. be able to.

Further, in the cooling storage according to the present invention, when the outside air temperature AT−the set temperature T ≦ 0, the opening / closing means closes the exhaust port to prevent the humidity in the storage chamber from decreasing.

[Brief description of drawings]

FIG. 1 is a vertical side view of a low-temperature case.

FIG. 2 is a vertical sectional front view of a low-temperature case.

FIG. 3 is a perspective view of an essential part in which a part of a low-temperature case is cut away.

FIG. 4 is an overall perspective view of a low-temperature case.

FIG. 5 is a main part electric circuit diagram showing the invention of claim 1;

FIG. 6 is a main part electric circuit diagram showing the invention of claim 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation box 2 Opening / closing door 3 Heat conduction box 4 Cold air passage 5 Storage room 12 Evaporator 13 Cold air circulation blower 19 Intake port 20 Exhaust port 21 Vent hole 22 Small discharge hole 23 Humidity sensor-24 Opening / closing means 31 In-room temperature Sensor-32 Outside temperature sensor-

Claims (2)

(57) [Claims] 1. A heat-conducting box is arranged inside the heat-insulating box body having an opening / closing door at the front opening with a gap from the heat-insulating box body, and the inside of the heat-conducting box serves as a storage chamber. At the same time, the evaporator and the cool air circulating blower are arranged in the cold air passage between the heat insulating box and the heat conducting box, and in the cooling storage configured to indirectly cool the storage chamber, in the storage chamber, the storage chamber A humidity sensor for detecting humidity is provided, and the heat insulating box body is formed with an intake port that communicates the outside with the storage chamber, and an exhaust port that communicates the high pressure part of the cold air passage with the outside. The heat conducting box is formed with a vent communicating with the storage chamber and the low-pressure part of the cold air passage, and the exhaust port has an exhaust port when the humidity sensor detects a predetermined humidity. A cooling storage, which is provided with an opening / closing means for closing the. 2. A heat-conducting box is disposed inside the heat-insulating box body having an opening / closing door at the front opening with a gap from the heat-insulating box body, and the inside of the heat-conducting box serves as a storage chamber. In addition, an evaporator and a cool air circulating blower are provided in the cold air passage between the heat insulating box and the heat conducting box, and in the cooling storage configured to indirectly cool the storage chamber, the storage chamber internal temperature sensor -Is provided, and an outside temperature sensor is provided outside the heat insulation box,
The heat insulating box body has an intake port that communicates the outside with the storage chamber, and an exhaust port that communicates the high pressure part of the cold air passage with the outside, and the heat conducting box has the storage chamber. And a low-pressure portion of the cold air passage are formed to communicate with each other, and at the exhaust port, the outside air temperature AT-the internal set temperature T ≦ 0.
In this case, a cooling storage is provided with opening / closing means for closing the exhaust port.