JP5653872B2 - Case cooling system - Google Patents

Description

  The present invention relates to a casing cooling apparatus that cools a casing that houses a component that generates heat (also referred to as a heating element) such as a control board.

  2. Description of the Related Art Conventionally, a cooling device that cools the inside of a housing containing a heating element as described above to a certain temperature or lower is known. For example, Patent Literature 1 discloses a cooling device in which a cooling device in which an air heat exchange type air conditioner and a refrigerant type air conditioner are integrated is installed in a casing. This cooling device is configured to selectively use an air heat exchange type air conditioner and a refrigerant type air conditioner according to the temperature inside the casing and the outside air temperature. Depending on the number of units). In Patent Document 2, an inside air passage from the inside of the housing and an outside air passage from the outside of the housing are independently arranged, an air heat heat exchange element is arranged at a portion where both intersect, and an inside air passage on the rear side thereof The structure which has arrange | positioned the Peltier element so that a thermal absorption part may face, and a thermal radiation part faces the external air path of the back side is disclosed. In such a cooling device, when the temperature of the inside air that has passed through the air heat exchange element is high, cooling is performed by the Peltier element.

  Patent Document 3 discloses a cooling device capable of managing humidity in addition to the temperature in the housing. This cooling device uses a Peltier element, and a humidity sensor is installed in the housing, and operation control is performed so that the dehumidifying operation is performed when the humidity exceeds a predetermined humidity. Further, Patent Document 4 discloses a cooling device that obtains a cooling effect by directly contacting the heat absorption side of a Peltier element with a heating element housed in a housing.

JP 2001-193955 A JP-A-2005-55025 JP 2008-141089 A JP 2003-8275 A

  However, the cooling device disclosed in Patent Document 1 described above has a structure in which a plurality of cooling devices in which an air heat exchange type air conditioner and a refrigerant type air conditioner are integrated are installed according to a load. The installation space for the apparatus increases, the cost increases, and the control for cooling becomes complicated. Further, in the cooling device disclosed in Patent Document 2 described above, when the outside air temperature is higher than the inside air, the inside air is warmed by the air heat exchange element, and it is necessary to cool the warmed inside air by the Peltier element. . That is, in the configuration disclosed in Patent Document 2, when the outside air temperature is high, a lot of energy is required as compared with the case where the inside air is directly cooled by the Peltier element.

  Further, the cooling device disclosed in Patent Document 3 described above is provided with a humidity sensor, and when the predetermined humidity is exceeded, the Peltier element is operated to dehumidify, but the drain is placed in a highly airtight casing. This will cause a problem in drainage and the like. Furthermore, the cooling device disclosed in Patent Document 4 described above requires the same number of Peltier elements and radiators when there are a plurality of heating elements in the casing, and thus the number of heating elements and the installation method are limited. Is generated, the cost is increased, and the control for cooling is complicated. Further, since the Peltier element is directly brought into contact with the heating element, there is a possibility that the heating element is affected by the occurrence of condensation.

  The present invention has been made paying attention to the above-described problems, and provides a cooling device capable of efficiently cooling the inside of the housing without being affected by the installation mode of the heating elements installed in the housing. The purpose is to provide. Another object of the present invention is to provide a cooling device capable of efficiently cooling the inside of the housing and preventing the generation of drainage.

In order to achieve the above-described object, a cooling device for a housing according to the present invention is installed in a housing containing a heating element, and the outside air is exhausted by a flow path through which the inside air is passed by a fan for inside air and a fan for outside air. The flow path to be separated is separated by a wall surface, and the air heat exchanger that performs heat exchange on the wall surface by allowing the inside air and the outside air to pass through each flow path, and the air heat exchanger are arranged in a distributed manner. wherein the heat absorption side heat sink exposed to the housing side comprising a heat absorbing fan, the a waste heat side heat sink having a casing exposed heat exhaust fan to the outside, and the exhaust heat-side heat sink and the heat absorption side heat sink An electronic cooler in which a cooling element is arranged, and a temperature T1, an outside air temperature T2 inside the housing, a cool air temperature T3 of the cooling element, and each fan of the air heat exchanger, the endothermic fan, Previous Heat exhaust fan, and a control unit for controlling the driving of the cooling device has a said control section, at the normal operating temperature range of the enclosure that is set in advance, the temperature in the enclosure first set When the temperature rises, each fan of the air heat exchanger is driven on the condition of (T2 <T1), and when the temperature in the casing rises to a second set temperature higher than the first set temperature, The driving of each fan of the air heat exchanger is stopped, and the cooling element is driven to cool on the condition (T3 ≧ SVB; SVB is a predetermined dew condensation determination value).

  The casing cooling device having the above-described configuration is provided with an air heat exchanger and an electronic cooler in a casing in which a heating element is stored, and the control unit switches and controls the operation according to a predetermined condition. The inside of the housing can be efficiently cooled. In this case, the switching control between the air exchanger and the electronic cooler is executed based on the temperature T1, the outside air temperature T2, and the cool air temperature T3 of the cooling element, so that an efficient cooling effect can be obtained. In particular, when the temperature rises to the first set temperature within the preset normal operating temperature range in the housing, the fan of the air heat exchanger is driven, and this fan is driven by (T2 <T1 Therefore, when the outside air temperature is higher than the temperature inside the housing, the outside air at an unnecessarily high temperature is not introduced into the housing and the temperature inside the housing is not rapidly increased. Further, when the temperature rises to a second set temperature higher than the first set temperature, the drive of the fan of the air heat exchanger is stopped and the cooling element is cooled (switching operation), so that the inside of the casing is efficiently Cooling is possible. In addition, the cooling drive of the cooling element is controlled to stop the cooling drive when the cool air temperature of the cooling element becomes lower than the dew condensation determination value (SVB), thereby preventing the generation of drain in the housing. It becomes possible to do.

  In the casing cooling apparatus having the above-described configuration, the control unit controls to heat the cooling element when the temperature drops to a third set temperature lower than the first set temperature within a normal operating temperature range. You may do it.

  In this case, even if the temperature in the housing is within the normal operating temperature range, the temperature in the housing is in a lowered state, so that the temperature in the housing is raised to an appropriate temperature by driving the cooling element. Can be maintained.

  Further, in the casing cooling apparatus having the above-described configuration, a plurality of systems are provided in parallel with the cooling elements, and the control unit is driven ON / OFF for each system according to the temperature T1 inside the casing. You may make it do.

  In such a configuration, since each system is sequentially operated according to the load (temperature load) of the heating element housed in the housing, the minimum configuration suitable for the load (optimum capacity according to the load) Thus, the control operation can be performed and energy saving can be achieved. In particular, by performing the control operation step by step for each system, the degree of hunting of the internal temperature is improved as compared with the configuration in which the cooling element is driven ON / OFF at a time.

  In the configuration in which a plurality of cooling elements are provided in parallel, a plurality of cooling elements provided in parallel may be connected in series.

  By comprising in this way, it becomes possible to aim at the improvement of cooling and a heating capability.

  In the casing cooling device having the above-described configuration, the control unit may perform control so as to maintain the heat absorbing fan in a driving state within a normal operating temperature range.

  With such a configuration, in the casing, the state where the inside air is constantly circulated is maintained by driving the heat absorption fan, and the temperature T1 inside the casing can be stabilized.

  In the casing cooling device having the above-described configuration, the control unit may control the exhaust heat fan to be driven when the temperature rises to the first set temperature within a normal operation temperature range.

  With this configuration, since the heat sink on the exhaust heat side of the electronic cooler is cooled before the cooling element of the electronic cooler is driven to cool, the cooling efficiency when the electronic cooler is driven to cool is reduced. Can be improved, and a rapid cooling effect can be exhibited. In addition, since the exhaust heat fan is driven for a while after the cooling drive of the cooling element is stopped, the performance of the cooling element can be stably maintained over a long period of time.

  In the casing cooling device having the above-described configuration, when the control unit exceeds the upper limit value of the normal operating temperature range, the air heat exchanger fan drive, the heat absorption fan drive, and the exhaust heat fan Control may be performed so as to maintain the driving of the cooling element and the cooling drive of the cooling element.

  In such a configuration, since the temperature inside the casing has risen beyond the normal operating temperature range, both the air heat exchanger and the electronic cooler are driven to quickly cool the temperature inside the casing. The interior of the housing can be returned to the normal operating temperature range. That is, since both the air heat exchanger and the electronic cooler are driven only when the temperature exceeds the normal operating temperature range, an efficient cooling operation can be performed.

  Further, in the case cooling apparatus configured as described above, when the control unit falls from a lower limit value of a normal operating temperature range, the air heat exchanger fan drive, the heat absorption fan drive, and the exhaust heat fan It may be controlled to stop the driving of the cooling element and the heating driving of the cooling element.

  Normally, the temperature inside the housing gradually increases due to the operation of the heating element, but if it is in a state where it falls below the lower limit value of the normal operating temperature range, it may stop because each drive element may be abnormally heated. By setting the state, it is possible to improve the energy-saving operation and safety.

  ADVANTAGE OF THE INVENTION According to this invention, the inside of a housing | casing can be cooled efficiently, without being influenced by the installation mode etc. of the heat generating body installed in a housing | casing. Moreover, the cooling device for housing | casing which can prevent generation | occurrence | production of drain by the efficient cooling in a housing | casing is obtained.

The whole schematic block diagram which shows one Embodiment of the cooling device for housing | casing which concerns on this invention. The block diagram which shows the structure of the control unit which carries out operation control of each drive part of the cooling device for cases. The control table which shows the aspect of the control driving | operation of the air heat exchanger implemented in a control part, and an electronic cooler. The graph which shows the relationship between the temperature in a housing | casing, and the control driving | operation of an electronic cooler.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a casing cooling apparatus according to the present invention will be specifically described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing the overall configuration of a housing having a cooling device.
The housing 1 of the present embodiment is configured in a box shape having a substantially rectangular cross section partitioned by a heat insulating material wall 3, and its internal space (hereinafter referred to as the interior) 4 is mounted on the front surface portion 3 </ b> A. It can be sealed by the opening / closing door 3A ′. For example, various heating elements such as a modem and a power supply device of a communication device are accommodated in the interior 4, and in this embodiment, the rack 5 having a plurality of shelf boards 5 a in the interior 4. The various heating elements are installed on the shelf board 5a.

  Cooling devices 10 for controlling and managing the temperature in the housing are distributed in the housing 1. The cooling device 10 is disposed on the ceiling portion 3B of the housing 1 and connects to the inside and outside of the housing, and the electronic heat cooler 20 is disposed on the back surface portion 3C and connects the inside and outside of the housing. 30 and a control unit 40 for controlling the operation of the air heat exchanger 10 and the electronic cooler 20. In this case, the control unit 40 only needs to be installed at any position of the housing 1. In this embodiment, the control unit 40 is installed on the shelf 5 a of the rack 5 in the cabinet 4. The cooling device 10 includes a sensor S1 that measures the temperature T1 inside the housing, a sensor S2 that measures the outside air temperature T2, and a sensor S3 that measures the cold air temperature T3 of the cooling element that constitutes the electronic cooler 30. The temperature information detected by these sensors S1 to S3 is input to a control unit constituting the control unit 40 and serves as a trigger signal for controlling the operation of each drive element, as will be described later.

The air heat exchanger 20 includes a casing 21 installed on the ceiling portion 3B. Inside the casing 21, the inside air 22A is discharged by a fan 22 installed inside the ceiling portion 3B. The outside air 23 </ b> A is passed by a fan 23 installed in the casing 21. In this case, the casing 21 in the present embodiment includes a flow path 21A that allows the outside air 23A to pass therethrough and a flow path 21B that allows the inside air 22A to pass. The flow paths 21A and 21B are preferably configured so that the outside air and the inside air can flow. The upper and lower sides are formed independently so as not to be mixed, and heat exchange is performed from the wall surface 21C of the adjacent channel. Moreover, it is preferable that each flow path 21A, 21B is configured in a fin shape so as to facilitate heat dissipation.
The fan 22 and the fan 23 described above are driven synchronously by the control unit of the control unit 40.

  The electronic cooler 30 includes a heat absorption side heat sink (heat radiating fan) 31 disposed on the inner side of the cabinet, and an exhaust heat side heat sink 33 disposed on the outer side of the cabinet. It is disposed so as to pass through an opening 3d formed in a mounting plate (not shown) provided in the portion 3C. In this case, the electronic cooler 30 includes a Peltier element 35 as a cooling element. The Peltier element 35 is connected to the mounting plate via a packing and a heat absorption side heat sink (heat dissipation fan) 31. It is arranged between. The exhaust heat side heat sink 33 is attached to the surface of the metal plate 36 opposite to the surface to which the Peltier element 35 is attached. In addition, although the Peltier device 35 is combined with a heat radiating fin, the heat radiating fin can be configured by various fin shapes or using heat pipes.

  An endothermic fan 32 is installed at one end of the endothermic heat sink 31 so as to allow the inside air in the compartment to pass through. The inside air 32A inside the compartment flows into the endothermic heat sink 31 and is discharged from the other end. In this case, as described above, the sensor S3 for measuring the cold air temperature T3 of the cooling element (Peltier element 35) is disposed at the other end. Further, an exhaust heat fan 34 is installed on one end side of the exhaust heat side heat sink 33 so as to exhaust air staying in the exhaust heat side heat sink 33 and is cooled and warmed by the Peltier element 35. The discharged air 34A is discharged to the outside.

  The cooling element 35, the heat absorption fan 32 and the exhaust heat fan 34 are individually driven by the control unit of the control unit 40. In this case, it is preferable that the heat absorption fan 32 and the exhaust heat fan 34 have a positional relationship in which the air flows are opposed to each other in the respective heat sinks 31 and 33. It is preferable that the air in the exhaust heat-side heat sink 33 is disposed so as to raise the internal air from the lower end portion so that the exhaust heat is exhausted upward to efficiently exhaust heat.

  In the above-described configuration, it is desirable that the material constituting the housing 1 is made of stainless steel as the outer plate, with an emphasis on weather resistance and strength. However, it is preferable to use an aluminum material for the light shielding plate and the frame material inside the housing in consideration of weight reduction. Moreover, about the material which comprises the inside shelf board 5a (rack 5) etc., it is preferable to use stainless steel from a viewpoint of intensity | strength and dust prevention. Further, for the metal plate 36 described above, it is desirable to use a copper plate from the viewpoint of heat conduction, but it is preferable to use an aluminum material because the weight increases.

FIG. 2 is a block diagram showing the configuration of a control unit that controls the operation of each drive unit of the cooling device.
The control unit 40 stores a predetermined operation program, and based on detected temperature signals transmitted from the sensors S1 to S3, the heat absorption of the fans 22 and 23 of the air heat exchanger 20 and the electronic cooler 30. A control unit 41 having a function of controlling driving of the fan 32, the exhaust heat fan 34, and the cooling element (Peltier element) 35 is provided. That is, the fans 22 and 23 of the air heat exchanger 20 are driven ON / OFF synchronously via a fan drive unit 42 having a drive circuit, and the heat absorption fan 32 and the exhaust heat fan 34 of the electronic cooler 30 are They are individually turned on / off via fan drive units 43 and 44 each having a drive circuit.

  In addition, the Peltier element 35 of the present embodiment is provided in parallel with a plurality of systems (in FIG. 2, four systems of Peltier elements 35A to 35D are shown), and the control unit 41 includes a plurality of systems of Peltier elements. The elements are controlled to be turned on / off for each system. That is, the Peltier elements 35A to 35D of each system are individually heated / cooled and turned ON / OFF via Peltier driving units 45 to 48 each having a driving circuit capable of inverting the polarity of current. Driven.

  In this embodiment, the cooling elements 35A to 35D provided in a plurality of systems in parallel are each composed of a plurality of Peltier elements, specifically, two Peltier elements (35A, 35a1), ( 35B, 35b1), (35C, 35c1), and (35D, 35d1) are connected in series. Of course, the number of Peltier elements and the number of Peltier elements connected in series can be appropriately modified depending on the specifications of the cooling device.

Next, the control operation method by the control unit 40 described above will be specifically described with reference to FIG.
FIG. 3 shows a control operation of the fans 22 and 23 of the air heat exchanger 20, the heat absorption fan 32, the exhaust heat fan 34, and the Peltier element 35 of the electronic cooler 30 that is performed in the control unit 41 of the control unit 40. The control table which shows the example of a mode is shown.

  When the temperature T1 in the casing rises to the first set temperature (SV2) within the preset normal operating temperature range R, the controller 41 sets the outside air temperature T2 to the temperature T1 in the casing. The fans 22 and 23 of the air heat exchanger 20 are driven on the condition that they are smaller (T2 <T1) (see the control table (a)). Further, when the temperature T1 in the casing rises to the second set temperature (SV3) higher than the first set temperature (SV2), the driving of the fans 22 and 23 of the air heat exchanger 20 is stopped (control table ( (Refer to b)), the Peltier element 35 is cooled and driven under the condition that the cold air temperature T3 of the Peltier element 35 is equal to or higher than a predetermined dew condensation determination value (SVB) (see control table (c)). .

  As described above, when the internal temperature T1 rises to the first set temperature (SV2) within the normal operating temperature range R in the housing 1, the fans 22 and 23 of the air heat exchanger 20 are driven. Thus, it becomes possible to cool the raised internal temperature. As described above, in a region where there is a difference between the temperature in the casing and the outside air temperature, the operation is performed only by the air heat exchanger 20 and the operation of the electronic cooler 30 is not performed, so that energy saving can be achieved. In this case, as described above, the driving of the fans 22 and 23 is based on the condition that the outside air temperature T2 <the inside air temperature T1. Therefore, when the outside air temperature is higher than the temperature inside the casing, the outside air having an unnecessarily high temperature is generated. It is not introduced into the housing 1 and the temperature inside the housing 1 is not rapidly increased. That is, the driving of the fans 22 and 23 of the air heat exchanger 20 is stopped until the outside air temperature becomes lower than the inside temperature, and external heat is prevented from moving into the housing as much as possible.

  If the temperature T1 in the housing rises due to the stop of driving of the fans 22 and 23 and rises to the second set temperature (SV3) higher than the first set temperature (SV2), the Peltier element 35 is driven to cool. Then, control is performed so that the interior is cooled and kept at a constant temperature (see the control table (c)). When the Peltier element 35 has failed over the entire system, the fans 22 and 23 continue to be driven on condition that the outside air temperature T2 <the inside air temperature T1, and cool the inside of the cabinet (control). Table (b) * 1).

  When the Peltier element 35 is driven to cool, when the cool air temperature T3 of the Peltier element 35 is lower than a predetermined dew condensation determination value (SVB), dew condensation occurs at the heat sink side heat sink (heat radiating fan) 31. Therefore, the cooling drive is controlled so as to be prevented from being generated in the storage (see the control table (c)). That is, in this embodiment, the cooling operation is controlled so that the temperature range where condensation occurs (below the condensation determination value) does not occur in the portion where condensation is likely to occur, and the control is performed so as to keep the internal temperature constant. doing.

  As for the determination of condensation, for example, the operation may be controlled by determining the dew point temperature by detecting the humidity sensor and the internal temperature. However, as in the present embodiment, the condensation determination value (SVB) is determined in advance. In addition, the control items can be simplified by performing the operation control using the temperature below that temperature as the dew point temperature. In the present embodiment, even if the sensor S1 that detects the temperature T1 in the housing fails, the sensor S3 that measures the cold air temperature T3 can be used instead.

  Further, when the upper limit value (SV3 + 10 ° C.) of the normal operating temperature range R is exceeded, the control unit 41 drives the fans 22 and 23 of the air heat exchanger 20 and the heat absorption unit that is the driving unit of the electronic cooler 30. Control is performed to maintain the drive of the fan 32, the drive of the exhaust heat fan 34, and the cooling drive of the Peltier element 35.

  Thus, since the temperature T1 in the housing 1 has risen beyond the normal operating temperature range R, both the air heat exchanger 20 and the electronic cooler 30 are driven, and the temperature inside the housing 1 Is quickly cooled, and the inside of the housing is returned to the normal operating temperature range R. That is, since both the air heat exchanger 20 and the electronic cooler 30 are driven only when the temperature T1 in the casing rises beyond the normal operation temperature range R, an efficient cooling operation can be performed. It becomes possible.

  As described above, according to the cooling device 10 described above, the air heat exchanger 20 and the electronic cooler 30 are disposed in the casing 1 in which the heat generating body is housed, and the control unit 40 is configured according to predetermined conditions. Since the operation is switched and controlled, the operation cost can be reduced and the inside of the housing can be efficiently cooled. In addition, since the air heat exchanger 20 and the electronic cooler 30 can be switched to either one drive or both drive in an optimal state, the air heat exchanger and the electronic cooler 30 generate heat. There is no need to install a plurality of devices according to the load on the body, and the installation space in the housing is not increased and the cost is not increased. Furthermore, since the switching control between the air exchanger 20 and the electronic cooler 30 is executed based on the temperature T1, the outside air temperature T2, and the cool air temperature T3 of the Peltier element 35, an efficient cooling effect can be obtained. The cooling drive of the Peltier element can be controlled to stop the cooling drive when the cold air temperature is lower than the dew condensation determination value (SVB), so that it is possible to prevent the drain from being generated in the housing. It becomes.

  In the present embodiment, the control unit 41 drives the Peltier element 35 to be heated when the temperature falls to the third set temperature (SV1) lower than the first set temperature (SV2) within the normal operating temperature range R. (See the control table (d)).

  In this case, even within the normal operating temperature range R, the temperature in the housing 1 is considerably lowered. Therefore, by driving the Peltier element 35 to be heated, the temperature in the housing 1 is more appropriate. The temperature can be raised and maintained. Note that the situation in which the temperature in the housing does not rise even in the heating operation by the Peltier element 35 is (SV1-5 ° C. or less), which is a range that cannot occur in a normal operation state. For this reason, in this embodiment, since there is a possibility that a heating abnormality may occur (exceeding the specification operating temperature range of the device) in such a situation, control is performed to stop all driving elements, and safety is improved. doing. Alternatively, when a situation in which the internal temperature becomes (SV1-5 ° C. or lower) has passed for a certain period of time, it is assumed that a heating abnormality may occur, and the control unit 41 transmits an abnormality alarm to the outside. Also good.

  Further, the control unit 41 may perform control so that the heat absorbing fan 32 of the electronic cooler 30 is maintained in the driving state within the normal operating temperature range R. With this configuration, since the heat absorption fan 32 is constantly driven in the housing 1, the state in which the inside air is constantly circulated can be maintained, and the temperature T <b> 1 inside the housing can be stabilized. It becomes.

  Further, the control unit 41 controls the exhaust heat fan 34 of the electronic cooler 30 to be driven when the temperature T1 in the housing rises to the first set temperature (SV2) within the normal operating temperature range R. It is preferable to do. This is because, when the Peltier element 35 is cooled and driven at the second set temperature (SV3), on the heating side of the Peltier element (exhaust heat side heat sink 33), including the radiating fin portion of the Peltier element, after the Peltier element operation is stopped ( Even if the internal temperature is lowered to the first set temperature SV2, the high state continues for a while, and the Peltier element 35 is required to perform heat dissipation on the heating side without promptly radiating heat. Since the life of the Peltier element 35 is affected (refer to the control table (v)) and before and after (refer to the control table (f)), the exhaust heat fan 34 is controlled to be driven. In the heating side, heat is quickly dissipated, and the cooling effect can be maintained by preventing the temperature T1 in the housing from rising, and the performance of the Peltier element 35 can be improved over a long period of time. It is possible to Joka. The exhaust heat fan 34 may be driven in conjunction with the cooling drive of the Peltier element 35, or after the cooling drive of the Peltier element stops, it may be controlled to be driven for a certain time by a delay timer or the like. good.

  Further, the heat absorption fan 32 and the exhaust heat fan 34 described above are controlled so as to be driven synchronously when the fans 22 and 23 of the air heat exchanger 20 are being driven, so that the heat conduction can be achieved. The internal temperature can be released to the outside, and the internal temperature can be stabilized.

  In the cooling device of the present embodiment, a plurality of Peltier elements 35 constituting the electronic cooler 30 are provided in parallel. In this case, the control unit 41 may perform control so as to perform ON / OFF driving for each system in accordance with the temperature T1 in the housing. Specifically, for example, as shown in FIG. 4, if the Peltier element 35 is heated and driven when the temperature T1 in the housing gradually decreases and falls from the third set temperature (SV1), the control unit 41 is The Peltier element 35A system is driven when the temperature falls by 3 ° C. from the third set temperature (SV1), and the Peltier element 35B system is driven when the temperature falls by 3 ° C. from the third set temperature (SV1). The Peltier element 35C system is driven when the temperature falls by 4 ° C. from SV1), and the Peltier element 35D system is driven when the temperature falls by 5 ° C. from the third set temperature (SV1) so that the maximum heating state is achieved. . And when temperature T1 in a housing | casing rises by such a control driving | operation, it is made to carry out stop control sequentially for every heating system similarly.

  As described above, the degree of hunting of the temperature in the housing is compared with the configuration in which a plurality of Peltier elements are provided and the control operation is performed step by step for each system, so that the Peltier elements are driven ON / OFF at a time. Can be improved. Further, in such a configuration, it becomes possible to sequentially operate each system in accordance with the load (temperature load) of the heating element housed in the housing 1, and the minimum configuration suitable for the load (load It is possible to perform control operation with a combined optimal capacity), and to reduce the operation cost and save energy. Of course, such stepwise control operation is also performed when the temperature T1 in the casing rises and the temperature in the casing is cooled to drive the Peltier element 35 at the second set temperature (SV3) described above. It is possible.

  In the present embodiment, since a plurality of Peltier elements 35A to 35D provided in parallel in a plurality of systems are connected in series, the cooling capacity and the heating capacity can be improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to above-described embodiment, It can change variously.

  For example, in the above-described electronic cooler 30, a configuration in which a plurality of Peltier elements 35 are arranged and controlled in stages can be implemented even in a cooling device in which the air heat exchanger 20 is not installed. is there. In other words, in such a configuration, cooling (heating) drive control according to the load of the heating element can be realized, and the degree of hunting can be improved to efficiently cool (heat) the inside of the housing. The electronic cooler 30 can also use a cooling structure based on a general refrigerant circulation, for example, in addition to the one using a Peltier element.

  The air heat exchanger 20 described above is configured to exchange heat by heat conduction through the wall surface 21C partitioned without direct contact between the internal air 22A and the external air 23A. However, the heat exchange system may be variously modified. Is possible. For example, various heat radiating fins, for example, lattice fins having a laminated structure, may be installed in the casing 21 and heat exchange may be performed through a flow path between the lattices.

  Furthermore, you may comprise so that it may have a humidity adjustment function by installing a hygroscopic agent in the housing | casing 1 by improving the airtightness of the housing | casing 1 mentioned above.

DESCRIPTION OF SYMBOLS 1 Housing | casing 10 Cooling device 20 Air heat exchanger 22, 23 Fan 30 Electronic cooler 31 Heat absorption side heat sink 32 Heat absorption fan 33 Waste heat side heat sink 34 Waste heat fan 35 Peltier element 40 Control unit 41 Control part

Claims (8)

Installed in the housing containing the heating element, the flow path through which the inside air is passed by the inside air fan and the passage through which the outside air is passed by the outside air fan are separated by a wall surface, and the inside air and the outside air are separated into each flow path. An air heat exchanger for exchanging heat on the wall surface by passing ,
Are arranged distributed with the air heat exchanger, comprising the heat absorbing side heat sink exposed to the housing side comprising a heat absorbing fan, the exhaust heat-side heat sink having a heat exhaust fan is exposed to the outside the housing An electronic cooler in which a cooling element is disposed between the heat absorption side heat sink and the exhaust heat side heat sink,
Based on the temperature T1, the outside air temperature T2, and the cool air temperature T3 of the cooling element, the driving of each fan of the air heat exchanger, the heat absorbing fan, the exhaust heat fan, and the cooling element is controlled. A control unit;
A housing cooling device having
When the temperature in the housing rises to the first set temperature within the preset normal operating temperature range in the housing , each of the air heat exchangers is conditional on (T2 <T1) . When the fan is driven and the temperature inside the casing rises to a second set temperature higher than the first set temperature, the driving of each fan of the air heat exchanger is stopped and (T3 ≧ SVB; SVB is The cooling element is driven to cool on the condition of a predetermined dew condensation determination value).
A cooling device for a housing characterized by that.   2. The casing according to claim 1, wherein the control unit heat-drives the cooling element when the temperature drops to a third set temperature lower than the first set temperature within the normal operation temperature range. Cooling device. The cooling element is provided in parallel in a plurality of systems,
The casing cooling device according to claim 1 or 2, wherein the control unit performs ON / OFF driving for each system in accordance with a temperature T1 inside the casing.   The cooling device for a housing according to claim 3, wherein a plurality of the cooling elements provided in parallel in the plurality are connected in series.   5. The casing cooling device according to claim 1, wherein the control unit maintains the heat absorption fan in a driving state within the normal operation temperature range. 6.   6. The housing according to claim 1, wherein the controller drives the exhaust heat fan when the temperature rises to the first set temperature within the normal operating temperature range. Cooling device. When the upper limit value of the normal operating temperature range is exceeded, the control unit performs driving of each fan of the air heat exchanger, driving of the heat absorbing fan, driving of the exhaust heat fan, and cooling driving of the cooling element. The housing cooling device according to claim 1, wherein the housing cooling device is maintained. When the control unit falls from the lower limit value of the normal operating temperature range, it drives each fan of the air heat exchanger, drives the heat absorption fan, drives the exhaust heat fan, and heats the cooling element. The housing cooling device according to any one of claims 1 to 7, wherein the housing cooling device is stopped.

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