JP3268854B2 - Cooling 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 cooling storage for storing goods and the like in a storage kept at a constant humidity.

[0002]

2. Description of the Related Art Conventional cooling storages are disclosed in
As disclosed in Japanese Unexamined Patent Publication No. 266304 and Japanese Patent Laid-Open Publication No. 3-144280, there is an apparatus in which the inside of a storage defined inside a heat insulating box is indirectly cooled by a cooling circuit. In some of such cooling storages, a temperature sensor is disposed in the storage, and the operation of the cooling circuit is controlled based on temperature information from the temperature sensor to maintain the inside of the storage at a desired temperature.

In a constant-temperature, high-humidity storage, which is a type of cooling storage for storing goods and the like in a storage kept at a constant humidity, it is necessary to detect not only the temperature in the storage but also the humidity. A detection sensor is arranged in the refrigerator to detect the humidity in the refrigerator. Then, the temperature in the refrigerator is changed based on the humidity information from the humidity detection sensor to keep the humidity in the refrigerator at a desired value.

[0004]

However, in a cooling storage provided with such a humidity detecting sensor, the humidity is automatically adjusted by a microcomputer. Even if it comes out of the refrigerator, the humidity in the refrigerator cannot be known from the outside, so that there is a problem that the quality and the like of the stored products are impaired.

In addition, the conventional humidity detecting sensor has a problem that the production cost is high because the price is higher than the temperature detecting sensor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling storage in which the humidity in the storage can be known from outside and the production cost can be reduced.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a heat insulating box.
Indirectly cool the storage area defined in the
Place the dew receiving plate that receives the dew generated in the storage on the ceiling in the storage.
In a cold storage mounted on a surface, the inner wall of the storage
A temperature that is installed separately from the storage and detects the temperature inside the storage
A degree detection sensor and the dew receiving plate attached to the dew receiving plate.
A water temperature detection sensor that detects the temperature of the water accumulated on the
Temperature information from the temperature sensor and the water temperature sensor.
Detects the humidity in the refrigerator based on the report and the water temperature information, and displays it.
And a control device for displaying the information.

[0008]

[0009]

According to this configuration , the temperature in the storage is controlled by the temperature in the storage.
Detected by a temperature sensor mounted away from the wall
And can be attached to the top of the storage
Water attached to the exposed dew support plate
Can be detected by the water temperature detection sensor.
Then, a temperature detection sensor and a water temperature detection are performed by the control device.
Storage based on temperature information from inside and water temperature from sensor
It can detect indoor humidity and display it on the display device.
You.

[0010]

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of a constant-temperature and high-humidity storage which is an example of a cooling storage according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of an upper side thereof.

In FIG. 1, reference numeral 1 denotes a heat insulating box having an opening / closing door 2 on a front surface thereof. Is provided. A control box 7 having a built-in microcomputer as a control device described later is arranged on the front of the machine room 6.

On the other hand, an inner box 8 forming a storage is mounted inside the heat insulating box 1 so as to have a predetermined gap S on the inner wall of the heat insulating box 1, and an evaporator 9 and a cooling device are provided in the gap S. Cool air is circulated by a cooling circuit formed by the fan 10 and the inner box 8 is indirectly cooled by the cool air.

4a is a cooling fan for cooling the refrigerant, 11 is a shelf provided in the inner box 8, and 12 is below the top 8a for receiving the dew on the top 8a of the inner box 8. The attached dew receiving plate.

Meanwhile, a dew point temperature detection sensor (hereinafter referred to as a dew point sensor) 13 for detecting a dew point temperature is provided on one wall surface 8b of the inner box 8. Further, a temperature detection sensor (hereinafter referred to as a temperature sensor) 14 for detecting the temperature of the inside 8A of the refrigerator is arranged on the dew receiving plate 12 so as not to contact the wall surface 8b.

The dew point temperature information and the in-chamber temperature information detected by the dew point sensor 13 and the temperature sensor 14 are:
At a predetermined timing, as shown in FIG.
Are input to a control unit (not shown).

Here, the microcomputer 15 detects the humidity of the interior 8A based on the dew point temperature information and the interior temperature information input from the dew point sensor 13 and the temperature sensor 14, and the interior 8A detects the desired humidity. This is for controlling the driving of the cooling circuit 16 such that

In order to detect the humidity of the interior 8A, a table for determining the relative humidity of the interior 8A based on the interior temperature and the dew point temperature is stored in a storage unit (not shown) of the microcomputer 15; When the dew point temperature information and the inside temperature information are input to the control unit, the control unit detects the humidity of the inside 8A of the inside by comparing each of the temperature information with a table stored in the storage unit. ing.

Then, the control unit displays the humidity of the inside 8A detected in this way, for example, by a display device 17 arranged on the front surface of the control box 7, and makes the humidity of the inside 8A lower than the desired humidity. When the temperature is too low, the cooling circuit 16 is driven and controlled so as to lower the temperature in the refrigerator to increase the humidity, and to increase the temperature in the refrigerator if the humidity is higher than the desired humidity.

Next, a description will be given of the humidity display operation of the thus-configured constant temperature and high humidity chamber with reference to the flowchart shown in FIG.

When the power of the constant temperature and high humidity chamber 1 is turned on (Y in decision 50), the microcomputer 15 starts to operate, and firstly inputs dew point temperature information from the dew point sensor 13 to the control unit (step 5).
1) Then, the internal temperature information is input from the temperature sensor 14 to the control unit (process 52). For example, now, the dew point temperature is 3 degrees, and the temperature in the refrigerator is 7 degrees.

Next, the control section detects the inside humidity by comparing the dew point temperature information and the inside temperature information with the table stored in the storage section (step 53). Here, when the dew point temperature is 3 degrees and the inside temperature is 7 degrees, it is detected from the table that the inside humidity is 75%. And
The humidity in the refrigerator thus detected is displayed on the display device 17 (process 54).

The control unit displays this value on the display device 17 until a predetermined time elapses (N in decision 55). Is input the dew point temperature information and the inside temperature information again to obtain the inside humidity (processing 51, processing 52,
Process 53), and displays this value (Process 54).

This operation is performed until the power is turned off (N in decision 50). Note that the microcomputer 15 lowers the internal temperature in order to increase the humidity when the humidity of the interior 8A is lower than the desired humidity, and decreases the internal temperature when the humidity is higher than the desired humidity. The driving of the cooling circuit 16 is controlled so as to increase the pressure.

Thus, by installing the dew point sensor 13 and the temperature sensor 14 in the interior 8A, the dew point temperature and the interior temperature are detected, and the interior humidity is detected from the dew point temperature and the interior temperature. Can be. Then, the display device 1 arranged in the control box 7 uses the humidity in the refrigerator.
7 can be displayed. Further, since the dew point sensor 13 and the temperature sensor 14 are cheaper than the humidity detection sensor, the production cost can be reduced.

In the above description, the dew point sensor 13 and the temperature sensor 1 are used to detect the humidity in the refrigerator.
4, the present invention is not limited to this, but instead of the dew point sensor 13, the humidity inside the refrigerator is measured by using a dry and wet bulb hygrometer formed by a water temperature detection sensor and a temperature sensor 14. It can also be detected.

FIG. 5 is a block diagram of a microcomputer arranged in a constant temperature and high humidity chamber according to another embodiment of the present invention. 3, the same symbols as those in FIG. 3 indicate the same or corresponding parts.

In FIG. 1, reference numeral 18 denotes a water temperature sensor (hereinafter, referred to as a water temperature sensor) arranged so that the temperature sensing portion is entirely immersed in water (dew) accumulated on the dew receiving plate 12. And the temperature sensor 14 form a wet / dry bulb hygrometer.

Here, the water temperature sensor 18 serves as a wet bulb thermometer of the dry / wet bulb hygrometer, and the temperature sensor 14 serves as a dry bulb thermometer. Then, the water temperature information (hereinafter, referred to as wet bulb temperature) from the water temperature sensor 18 and the temperature information (hereinafter, referred to as dry bulb temperature) from the temperature sensor 14 are input to the control unit of the microcomputer 15.

On the other hand, the microcomputer 15 detects the humidity of the interior 8A based on the wet bulb temperature and the dry bulb temperature input from the water temperature sensor 18 and the temperature sensor 14, and
This is for controlling the driving of the cooling circuit 16 so that A has a desired humidity.

In order to detect the humidity of the interior 8A, a table for calculating the relative humidity based on the wet bulb temperature and the dry bulb temperature is stored in the storage unit of the microcomputer 15;
When the wet-bulb temperature and the dry-bulb temperature are input to the control unit, the control unit detects the humidity of the inside 8A of the refrigerator by comparing these temperatures with a table stored in the storage unit. .

The control unit displays the humidity of the interior 8A on the display device 17 and, when the humidity of the interior 8A is different from the desired humidity, drives the cooling circuit 15 to change the interior temperature. I try to control.

Next, a description will be given of a humidity display operation of the thus-configured constant temperature and high humidity chamber with reference to a flowchart shown in FIG.

When the power of the constant temperature and high humidity chamber 1 is turned on (Y in decision 60), the microcomputer 15 starts operating, and first inputs the wet bulb temperature from the water temperature sensor 18 to the control unit (step 61).
Next, the dry bulb temperature is input to the control unit from the temperature sensor 14 (process 62). For example, assume that the wet bulb temperature is 2 degrees and the dry bulb temperature is 3 degrees.

Next, the control unit detects the humidity in the refrigerator by comparing the wet bulb temperature and the dry bulb temperature with a table stored in the storage unit (step 63). Here, when the wet bulb temperature is 2 degrees and the dry bulb temperature is 3 degrees, it is detected from the table that the humidity in the refrigerator is 85%. Then, the control unit displays the detected humidity in the refrigerator on the display device 17 (process 64).

The control unit displays this value on the display device 17 until the predetermined time has elapsed (N in decision 65), and when the predetermined time has elapsed (Y in decision 65), the microcomputer 15 returns to the wet bulb mode. The temperature and the dry-bulb temperature are input to determine the humidity in the refrigerator (process 61, process 62, process 63), and this value is displayed (process 64). This operation is performed until the power is turned off (N in decision 60).

As described above, the humidity in the refrigerator can be detected by installing the water temperature sensor 18 and the temperature sensor 14 in the refrigerator 8A and forming a wet / dry bulb hygrometer. Then, the humidity in the refrigerator can be displayed by the display device 14 arranged in the control box 7. Further, since the water temperature sensor 18 and the temperature sensor 14 are cheaper than the humidity detection sensor, the production cost can be reduced.

In the above description, the microcomputer 13 detects and displays the humidity of the interior 8A at predetermined intervals, but the present invention is not limited to this. A display switch may be provided, and the microcomputer 13 may detect and display the humidity of the interior 8A only when the humidity display switch is pressed.

[0040]

As described above, according to the present invention, the humidity in the refrigerator is detected by combining the temperature detection sensor and the dew point temperature detection sensor or the water temperature detection sensor, and the detected humidity in the refrigerator is displayed on the display device. As a result, the inside humidity can be known from outside. Further, since these temperature detection sensors and the like are inexpensive as compared with the humidity detection sensors, production costs can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view of a constant-temperature and high-humidity storage as an example of a cooling storage according to an embodiment of the present invention.

FIG. 2 is a sectional side view of an upper part of the constant temperature and high humidity chamber.

FIG. 3 is a block diagram of a microcomputer arranged in the constant temperature and high humidity chamber.

FIG. 4 is a flowchart showing a humidity display operation of the constant temperature and high humidity chamber.

FIG. 5 is a block diagram of a microcomputer arranged in a constant temperature and high humidity chamber according to another embodiment of the present invention.

FIG. 6 is a flowchart showing a humidity display operation of a constant temperature and high humidity chamber according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated box 8 Inner box 12 Dew receiving plate 13 Dew point temperature detection sensor 14 Temperature detection sensor 15 Microcomputer 17 Display device 18 Water temperature detection sensor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 23/00 301 F25D 29/00

Claims (1)

(57) [Claims] 1. A storage compartment defined inside an insulated box.
Cool indirectly and receive dew in this storage.
Storage with a dew receiving plate attached to the top of the storage
In the storage, mounted away from the inner wall of the storage,
A temperature detection sensor for detecting the temperature of the dew receiving plate, and water collected on the dew receiving plate.
A water temperature detection sensor for detecting a temperature, and a temperature in the refrigerator from the temperature detection sensor and the water temperature detection sensor
Detects humidity in the refrigerator based on the
And a control device for displaying on the display
Storage.