JP4345530B2 - Heat exchange type cooling system - Google Patents

Description

  The present invention is a box structure that is installed outdoors, and contains equipment whose temperature, humidity, dust, etc. affect its performance and life. The equipment generates a large amount of heat, so it can be cooled even in the cold season. More particularly, the present invention relates to a cooling device and a control method thereof.

  Conventionally, as a cooling device for a box structure installed outdoors, by installing a cooling device on the outer wall of the box structure, the outside air and the air in the box structure (hereinafter referred to as the inside air) when the outside air temperature is low. The inside air is cooled by exchanging heat, and the cooling load of the cooling device such as an existing air conditioner is reduced, the operation time is reduced, and there is an energy saving (for example, Patent Document 1).

In addition, there has been an arrangement in which an electric heater is disposed in the outside air inlet so that condensation does not occur on the heat exchange element even in a cold region (for example, see Patent Document 2).
JP 2001-156478 A (FIG. 1) JP-A-6-323593 (FIG. 1)

  However, in the configuration of Patent Document 1, since the box structure is cooled by heat exchange between the outside air and the inside air, when the outside air temperature is low and the inside of the box structure is also cooled, the box structure It is not possible to warm the inside.

  Some devices housed in a box structure require an ambient temperature above a certain level for startup, so when such devices are housed, the device cannot be started depending on the ambient temperature. There are challenges.

  For this reason, when the device accommodated in the box structure starts, if the outside air temperature is lower than the ambient temperature at which the device starts and the inside of the box structure is cold, the box body is temporarily It is required to heat the inside of the structure.

  Moreover, in the structure of the said patent document 2, since external air enters directly into a box structure, dust, a water | moisture content, etc. penetrate | invade into a box structure, and there exists a concern about the bad influence on the apparatus accommodated.

  The present invention solves such a conventional problem, and by incorporating a heating means in the heat exchange type cooling device, when the outside air temperature is low and the inside of the box structure is cold, The box structure is heated regardless of the temperature conditions of the outside air and the inside air by heating the inside of the box structure by a heating means, and otherwise cooling the inside of the box structure using heat exchange between the outside air and the inside air. Clean heat that does not use a refrigerant that can start up the equipment contained in the object and that can cool the box structure throughout the year by preventing dust and moisture from entering the box structure with low power consumption. An object is to provide a replaceable cooling device.

In order to achieve the above object, the heat exchange type cooling device of the present invention takes in the air in the box structure (hereinafter referred to as inside air) and returns the air to the inside of the box structure for circulation. A blower that takes in air outside the box structure (hereinafter referred to as outside air) and arranges the outside air passages to be discharged outside the box structure so as to be independent of each other, and conveys the air in the outside air passage and the inside air passage. A heat exchange element that exchanges sensible heat between the outside air and the inside air, an inside air temperature sensor that measures the inside air temperature, an outside air temperature sensor that measures the outside air temperature , Heating means on the blow-out side of the air air passage, an inside air side fan in the inside air air passage, and an outside air side fan in the outside air air passage, the inside air temperature measured by the inside air temperature sensor, and the outside air temperature sensor When the measured outside air temperature is lower than the specified minimum starting temperature The, the said heating means to operate the room air fan, is intended to stop the outside air fan.

  This means that the equipment housed in the box structure can be activated regardless of the temperature conditions of the outside air and the inside air, and it is possible to cool the box structure with a small amount of power consumption and use a refrigerant that does not use refrigerant. A heat exchange type cooling device can be obtained.

Further, in order to achieve the above object, the heat exchange type cooling apparatus of the present invention has an outside air temperature measured by the inside air temperature sensor that is lower than a predetermined minimum starting temperature and is measured by the outside air temperature sensor. Is higher than a predetermined minimum starting temperature, the heating means, the inside air fan, and the outside air fan are operated .

  By this means, an inside air air passage by the inside air side fan and an outside air air passage by the outside air side fan are configured by a plurality of fans, and the control of the fan of the inside air air passage and the control of the fan of the outside air air passage can be performed individually. If the inside air passage and the outside air passage can be configured, the arrangement of the blower can be freely selected.

  In addition, a heat exchange type cooling device that suppresses a decrease in the inside air temperature due to heat exchange between the outside air and the inside air and heats the inside of the box structure can be obtained.

  According to the present invention, by using both the cooling means and the heating means by heat exchange, the device accommodated in the box structure can be activated regardless of the temperature conditions of the outside air and the inside air, and the box structure is sealed. In this state, there is an effect that clean air conditioning without using a refrigerant can be performed in the box structure throughout the year with less power consumption without mixing moisture or dust.

  Further, by arranging the heating means at the outlet of the internal air passage, the ambient temperature at which the device accommodated in the box structure can be activated even when the outside air is cold can be set.

  When the outside air temperature is lower than the inside air temperature, when the inside air is heated, the outside air side fan is stopped to suppress the inside air temperature drop due to heat exchange between the outside air and the inside air, and the inside of the box structure It can be heated efficiently.

The present invention takes in air in a box structure (hereinafter referred to as “inside air”) and returns it to the inside of the box structure for circulation, and air outside the box structure (hereinafter referred to as “outside air”). It is arranged so that the outside air passages that take in and discharge outside the box structure are independent from each other, and are arranged at the intersection of the blower that carries the air in the outside air passage and the inside air passage, and the outside air passage and the inside air passage. a heat exchange element for exchanging ambient air and the inside air of sensible heat, and the inside air temperature sensor for measuring the inside air temperature, the outside air temperature sensor for measuring the outside air temperature, a heating means in the balloon side of said air path, said air path When the inside air side fan is provided in the outside air passage, and the inside air temperature measured by the inside air temperature sensor and the outside air temperature measured by the outside air temperature sensor are lower than a predetermined minimum starting temperature. In operation, the heating means and the inside air fan are operated. It is intended to stop the outside air fan, outside air, heating and cooling in the inside air can be activated equipment that is housed in the box structure regardless of the temperature conditions, also through box body year with low power consumption structure It has the effect | action that it becomes the clean heat exchange type | mold cooling device which does not use the refrigerant | coolant made possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

( Assumption example 1)
FIG. 1 is a schematic view of a heat exchange type cooling apparatus A. After the air in the box structure B (hereinafter referred to as “inside air”) is taken into the inside air side fan 2A of the blower 2 from the inside air suction port 1, the air passes through the heat exchange element 3, and the box structure An internal air passage 5 is formed to circulate back into the object B.

  On the other hand, air outside the box structure B (hereinafter referred to as “outside air”) is taken in from the outside air intake port 6, and passes through the heat exchange element 3, the outside air side fan 2 </ b> B of the blower 2, and the outside air outlet 7. An outside air passage 8 for discharging to the outside air is formed.

These air paths are installed so as to be independent, and a heat exchange element 3 for exchanging sensible heat between the outside air and the inside air is disposed at the intersection of the outside air path 8 and the inside air path 5. Further, the air from the inside air inlet 1 is heated by the heating means 9 and blown out from the inside air outlet 4 of the inside air passage 5 into the box structure B. As shown in FIG. 2, the heat exchange type cooling device A is attached to the outer wall of the box structure B and is configured by so-called “external attachment”.

  With the above configuration, the heat exchange type cooling device A takes in outside air when the outside air temperature is lower than the inside air temperature, exchanges heat with the warm air inside the box structure B, and becomes warm. The outside air is exhausted, and the cooled air is supplied into the box structure B.

  Further, when the device C accommodated in the box structure B is activated when the outside air temperature is low and the inside air temperature is low, the inside of the box structure B is heated by the heating means 9.

  As a result, the ambient temperature of the device C can be warmed and the device C can be activated.

  In addition, since the outside air passage 8 and the inside air passage 5 are independent, the outside air and the inside air are not mixed, so that moisture and dust contained in the outside air are not mixed into the box structure B. Also, no adverse effects due to moisture and dust on the device C inside the box structure B are generated.

( Assumption 2)
As shown in FIG. 1, by providing the blower 2 with the inside air side fan 2 </ b> A and the outside air side fan 2 </ b> B on one axis, both fans can be rotated by the single blower 2. As a result, the inside air air passage 5 and the outside air air passage 8 can be formed, and the operation can be stopped at the same time due to the uniaxial rotation in the control. Other configurations are the same as those of the first example .

( Assumption example 3)
When each of the plurality of blowers 2 is provided with the inside air side fan 2A or the outside air side fan 2B (not shown), each of the blowers 2 is individually controlled to control the air volume of the inside air path 5 and the air volume of the outside air path 8. Since it can be changed, the heating means 9 can be controlled by detecting the outside air temperature and the inside air temperature. Other configurations are the same as those in the first embodiment.

( Assumption example 4)
As shown in FIG. 1, the heating means 9 is arranged at the inside air outlet 4.

  Thereby, it is suppressed that the inside air heated with the heating means 9 heat-exchanges with external air with the heat exchange element 3, and temperature falls.

  Therefore, the inside air heated by the heating means 9 can be efficiently blown into the box structure B.

( Assumption Example 5)
As shown in FIG. 2, the heat exchange element 3 is arranged so that the stacking direction is orthogonal to the installation surface of the heat exchange type cooling device A on the box structure B.

  Thereby, when the calorific value of the device C is large, an increase in the cooling capacity of the heat exchange type cooling device A can be dealt with by increasing the number of stacked heat exchange elements 3, so that the box structure of the heat exchange type cooling device A It is not necessary to enlarge the installation surface on the object B

( Assumption Example 6)
As shown in FIG. 2, the air path generated by the cooling fan D of the device C and the internal air path 5 are integrated.

  Thereby, the cooling fan D can be substituted for the inside air side fan 2A, and the inside air side fan 2A can be omitted as shown in FIG.

(Embodiment 1 )
As shown in FIG. 4, in addition to the precondition example 1, the outside air temperature sensor 10 for measuring the outside air temperature is provided in the outside air inlet port 6 and the inside air temperature sensor 11 for measuring the inside air temperature is provided in the inside air inlet port 1. (Not shown) or the like.

  The controller 12 determines the operation from the outside air temperature measured by the outside air temperature sensor 10, the inside air temperature measured by the inside air temperature sensor 11, and the minimum starting temperature of the device C installed in the box structure B, and the outside air fan 2B and heating means 9 are controlled to start and stop.

  The same control can be performed in the case of the inside air side fan 2A (or the cooling fan D) and the outside air side fan 2B configured as shown in FIG.

  Hereinafter, the control method of the control part 12 is demonstrated using the control chart of FIG.

First, starting from the device C operation command 20, the inside air temperature sensor 11 measures the inside air temperature ( inside air temperature measurement 21 ) . Then, the operation determination 22 compares the minimum startup temperature of the device C with the inside air temperature. And if inside air temperature is more than the minimum starting temperature, it will become apparatus C operation 23 which operates apparatus C.

Then, the heating means operating 24 inside air temperature is operated low only lever than the minimum starting temperature, the heating means 9.

  Then, the outside air temperature measurement 25 is performed by the outside air temperature sensor 10 to compare the minimum startup temperature of the device C with the outside air temperature. If the outside air temperature is higher than the minimum starting temperature, the outside air fan is turned to perform the outside air fan 2B operation 27, and the process returns to the inside air temperature measurement 21. If the outside air temperature is equal to or lower than the minimum starting temperature, the outside air fan 2B is stopped and the outside air fan 2B stop 28 returns to the inside air temperature measurement 21.

  By such operation control, when the inside of the box structure B is cooled and the built-in device C cannot be started, the inside of the box structure B is heated mainly by the heating means, and the outside air temperature is set to the value of the device C. Even when the heating means 9 is used together only when heating by heat exchange is lower than the minimum starting temperature or heating by heat exchange is not possible, even when the outside air temperature is low and the inside of the box structure B is also cooled. If there is a minimum ambient temperature required to start up, the startup temperature of the device C can be handled.

  Note that the positions of the outside air temperature sensor 10, the inside air temperature sensor 11, and the control unit 12 are not limited to the positions shown in FIG. 4 as long as the outside air temperature and the inside air temperature can be measured. .

  Further, in the present embodiment, the case where the inside air side fan 2A is used has been described. However, when the inside air side fan 2A is eliminated and the cooling fan D is used as a substitute, the cooling fan D is used and the inside air side fan 2A is used. It is also possible to control similarly.

(Embodiment 2 )
FIG. 6 is a correlation diagram between the air volume and the inside air temperature of the inside air side fan 2A and the outside air side fan 2B of the heat exchange type cooling apparatus A in the present invention.

  As shown in FIG. 6, when the inside air temperature is equal to or higher than the set upper limit temperature, the inside air side fan 2A is operated at the maximum air volume. When the inside air temperature is not less than the set lower limit temperature and less than the set upper limit temperature, the air volume of the inside air side fan 2A is increased or decreased in accordance with the inside air temperature. Then, when the inside air temperature becomes lower than the set lower limit temperature, the inside air side fan 2A is stopped.

  Further, in the present embodiment, the case where the inside air side fan 2A is used has been described. However, when the inside air side fan 2A is eliminated and the cooling fan D is used as a substitute, the cooling fan D is used and the inside air side fan 2A is used. It is also possible to control similarly.

  With this control, power consumption can be suppressed and the temperature in the box structure B can be cooled within the range between the set upper limit temperature and the set lower limit temperature.

  The inside air circulation temperature is set between the set upper limit temperature and the set lower limit temperature. When the inside air temperature is not less than the set lower limit temperature and not more than the inside air circulation temperature, the outside air side fan 2B is stopped, and the box structure B is cooled by inside air circulation by the operation of the inside air side fan 2A.

  Thereby, the power consumption of the outside air side fan 2B can be reduced.

  When the outside air temperature is low, such as in winter, the amount of heat released from the box structure B is increased, so that it may be cooled only by the inside air circulation, thus saving energy.

  The present invention is a box structure that is installed outdoors like a mobile phone base station and has a heating element inside, which generates a large amount of heat and requires cooling even in winter, but reduces the power used for cooling. And a control method therefor.

Schematic of a heat exchange type cooling device as a premise example of the present invention Configuration diagram installed in the box structure Schematic showing the structure Same schematic Control chart of heat exchange type cooling device of the present invention Correlation diagram between air volume and room temperature

DESCRIPTION OF SYMBOLS 1 Inside air inlet 2 Blower 2A Inside air side fan 2B Outside air side fan 3 Heat exchange element 4 Inside air outlet 5 Inside air air path 6 Outside air inlet 7 Outside air outlet 8 Outside air path 9 Heating means 10 Outside air temperature sensor 11 Inside air temperature sensor 12 Control unit A Heat exchange type cooling device B Box structure C Equipment D Cooling fan E Control unit

Claims (2)

Takes in the air inside the box structure (hereinafter referred to as inside air), takes in the internal air path to be circulated back into the box structure and air outside the box structure (hereinafter referred to as outside air), and Arranged so that the outside air passages to be discharged out of the box structure are independent from each other, and arranged at the intersection of the outside air passage and the inside air passage with the blower for conveying the air in the outside air passage and the inside air passage. A heat exchange element for exchanging sensible heat;
A room temperature sensor for measuring the room temperature,
An outside temperature sensor for measuring the outside temperature;
Heating means on the blowout side of the inside air flow path ;
An inside air fan in the inside air path,
An outside air side fan is provided in the outside air path ,
When the inside air temperature measured by the inside air temperature sensor and the outside air temperature measured by the outside air temperature sensor are lower than a predetermined minimum starting temperature, the heating means and the inside air side fan are operated, and the outside air side fan is turned on. Heat exchange type cooling device to stop . When the inside air temperature measured by the inside air temperature sensor is lower than a predetermined minimum starting temperature and the outside air temperature measured by the outside air temperature sensor is higher than a predetermined minimum starting temperature, the heating means and the inside air fan The heat exchange type cooling device according to claim 1 , wherein the outside air side fan is operated .

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