JPS6280480A - Energy-saving type constant temperature and humidity storage in bedrock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a constant temperature constant temperature storage with low installation costs and low running costs.

``Prior art 1 As is well known, storage of grains such as rice, daikon radish, etc. must be carried out under a constant low temperature and low humidity environment. A certain degree of ventilation must be provided for stored items that have such conditions.Prior to the present invention, the present inventor developed a constant-temperature and constant-temperature storage with low installation and running costs as a constant-temperature storage that ensures such conditions. Figure 3 shows this conventionally proposed constant-temperature storage, in which the symbol l denotes a vinyl building installed in the bedrock space 2. A dehumidifier 3 is installed in the building 1 to dehumidify the internal atmosphere.The building 1 is also provided with an air intake hole 4 and an exhaust hole 5, respectively.

The above-mentioned air intake hole 4 is branched into one, one (hereinafter referred to as the rock inner surrounding air introduction hole 4a) opens into the inner rock space 2, and the other (hereinafter referred to as the outside air introduction hole 4b) opens to the outside air. It is open to Flow path opening/closing valves 6a and 6b are attached to the internal pressures of the rock internal surrounding air introduction hole 4a and the outside air introduction hole 4b, respectively.

Further, a heater 7 is installed near the building 1 inside the air intake hole 4.

The exhaust hole 5 is composed of a single unbranched pipe, and its exhaust end is open to the outside air. Further, a flow path opening/closing valve 6C is installed near the building 1 inside the exhaust hole 5.

A heat exchanger 8 is provided in the portion between the introduction hole 4a of the air intake hole 4 and the heater 7 mounting portion, and the portion of the exhaust hole 5 near this position.
is installed, and the atmosphere inside the intake hole 4 and the exhaust hole 5 are
Fans 8a and 8b are provided inside to enable heat exchange with the atmosphere inside.

According to the above configuration, the inside of the vinyl building 1 is kept at the same low temperature as the rock interior space 2, and in order to adjust the humidity during the mid-winter period, outside air with low humidity but too low for storage temperature is introduced. Also, the temperature inside the building 1 can be maintained constant by the heater 7 in the air intake hole 4. Moreover, since the actual amount of water vapor in the atmosphere inside the rock that is normally introduced into the building 1 is relatively small, the small dehumidifier 3 installed inside the building
Therefore, the humidity inside the building 1 can be easily maintained at a low and constant level. Furthermore, in this storage facility, the building 1 is located inside the bedrock, so it can be simple and inexpensive.Since the air normally introduced into the building 1 is the atmosphere inside the bedrock, the low temperature is approximately constant throughout the year, and the air inside the bedrock is Due to the low temperature of the atmosphere, the actual amount of water vapor (absolute humidity) is low, so the operating cost to maintain a constant low temperature and low humidity is low.
Economical.

"Problems to be Solved by the Invention" By the way, it has been found that there is room for further improvement in the temperature and humidity control mechanism of the previously proposed storage, thereby reducing operating costs.

The point that should be improved is the following.

(1) For example, the absolute humidity of the outside air is XO1, the absolute humidity inside the refrigerator is
If HO is r% outside air relative humidity, and Hr is inside relative humidity, then when Xo (Xr and Ho > Hr), when low absolute humidity outside air is introduced, the relative humidity inside building 1 increases as shown in Figure 9. There are cases where this happens.

That is, as shown in Figure S, point A is the outside temperature and humidity point, and point B is the outside temperature and humidity point.
is the temperature and humidity point before introducing outside air, C is the temperature and humidity point inside building 1 when low absolute humidity outside air is introduced, and the relative humidity 0% shown at point B inside building 1 is 0 due to the introduction of outside air. The relative humidity, indicated by the dot, would rise to 3 degrees.

(11) In response to the above situation, the heater is activated to warm the introduced outside air, but since the heater control mechanism is not configured,
The temperature inside the refrigerator will rise excessively. Although the relative humidity can be sufficiently lowered in this way, the amount of heating is large and an extra amount of electricity is consumed.

This invention was made in view of the above-mentioned circumstances, and provides an energy-saving constant temperature and humidity storage in rock that can reliably perform fine temperature and humidity control and significantly reduce operating costs. The purpose is to

"Means for Solving the Problems" As shown in FIG. 7, the storage according to the present invention first measures temperature, absolute and relative humidity in the building 1 inside the bedrock, in the space 2 inside the bedrock, and in the outside air. Temperature and humidity detectors 10, 11 and 12 are provided which can be used. A heater 13 that can be proportionally controlled in place of the conventional heater 7 is provided, and a relative humidity detector 14 is provided on the building side near the heater 13. Furthermore, upon receiving the measurement value signals from the temperature/humidity detectors 10, 11.12 and the relative humidity detector 14, the dehumidifier 3, heater 13, and heat exchanger 8 are operated/stopped, and the flow path opening/closing valve 6a; 6b,
A control device 15 for controlling the opening and closing of the building 6c is installed in the bedrock near the building 1.

"Operation" According to the above configuration, it is necessary to eliminate the difference (Hr - Hh(0)) between the relative humidity value 1 (r) in the building 1 and the relative humidity Hh of the introduced air detected by the relative humidity detector 14. Heating can be controlled by the heater 13 by the same amount, and the electricity cost of the heater 13 can be suppressed to the necessary minimum, and humidity control can be performed reliably.

``Example'' Temperature and humidity control using the storage structure shown in FIG. 1 is performed as follows.

As shown in FIG. 2, when the system is first operated, if the relative humidity Hr in the building 1 is within the set humidity, the building 1 is in the storage temperature and humidity range, so each on-off valve 6a, 6b,
6c remains closed, and neither the heat exchanger 8 nor the heater 13 nor the dehumidifier 3 is operated.

Conversely, if the relative humidity Hr exceeds the set humidity, building 1
It is determined whether the internal temperature Xr is greater than the outside temperature XO. When the temperature inside the building 1, Xr, is not larger than the outside temperature
If Xr>Xi is not satisfied, the dehumidifier 3 is operated, and if Xr>Xi, the bedrock hollow silver is introduced.

On the other hand, when the temperature xr inside the building 1 is higher than the outside temperature XO, it is further determined whether the temperature inside the building 1 Outside air is introduced, and when Xr>XlO, it is further determined whether the temperature dust Xi inside the bedrock is a dog based on the outside air temperature Xo.1. Xl) When the condition is not Xo, air in the bedrock is introduced, and when it is Xi) Xo, outside air is introduced.

After the temperature is determined for humidity control as described above and outside air or air in the rock is introduced, the heater 13 is kept stopped, and the relative humidity Hh of the introduced air is Determine whether it is large or not. And Hr)
If it is Hh, leave it as it is and return it to the starting position.
When r>Hh is not satisfied, the heater 13 is operated to heat the introduced air, and it is again determined whether or not Hr>Hh. Here, when Hr>Hh, return to the starting position and Hr>
When it is not Hh, f proportionally controls the heater 13 to achieve the above P2.
13 Give feedback before operation.

According to the above configuration, for example, even when outside air with a relative humidity of 10% RH or silver in the rock is introduced, the amount of heater heating performed to maintain the humidity at an appropriate value can be minimized, The energy required for operation can be reduced.

"Effects of the Invention" As explained above, according to the energy-saving in-base constant temperature and humidity storage according to the present invention, the relative humidity value Hr in the building in the bedrock and the relative humidity of the introduced air detected by the relative humidity detector It is possible to control the heating by the heater by the amount necessary to eliminate the difference with the humidity Hh (Hr - Hh < 0), and the electricity cost of the heater can be kept to the minimum required for operation. The internal humidity can be controlled economically and reliably.

[Brief explanation of drawings]

FIG. 7 is for explaining one embodiment of this invention.
Fig. 1 is a plan configuration diagram of an energy-saving in-base constant temperature and humidity storage according to the present invention, Fig. 2 is a flow diagram showing the control system of the same storage, and Fig. 3 is a conventional energy-saving in-base constant temperature and humidity storage. This is for explaining the storage, and FIG. 4 is a plan configuration diagram of the storage, and is a graph showing humidity fluctuations due to the introduction of outside air or air into the bedrock. 1... Building, 2... Space inside the bedrock, 3.
... Dehumidifier, 4 ... Air intake hole, 5 ...
・・Exhaust hole, 6a, 6b, 6c・・・・Opening/closing valve, 8
・Old... Heat exchanger, 10, 11. 12... Temperature and humidity detector, 13. River... Proportional control heater, 14...
...Relative humidity detector, 15...Control device.

Claims (1)

[Claims] A building is provided in the bedrock space to isolate the interior from the atmosphere inside the bedrock, and a dehumidifier is installed in this building, and the building is provided with an intake hole that opens into the bedrock space or the outside air, and an exhaust hole that opens to the outside air. A heater is installed in the air inlet, and a heat exchanger is attached to the air inlet and exhaust hole outside the heater mounting portion for exchanging heat between the atmospheres in the air inlet and the exhaust hole. In the energy-saving type constant temperature and humidity storage in the rock, temperature and humidity detectors are installed inside the building, inside the rock, and in the outside air, and a relative humidity detector is installed on the building side near the heater, so that the heater can be controlled proportionally. In addition to configuring
A control device that continuously operates and stops the dehumidifier, heater, and heat exchanger and opens and closes the air inlet and exhaust holes as appropriate in response to the measurement signal of the temperature/humidity detector and the relative humidity detector. An energy-saving in-rock constant temperature and humidity storage, characterized in that it is installed in or near the building.