DE102009060398A1 - Protective housing i.e. instrument shelter, for e.g. use as rectifier housing for electrical instrument, has heat exchanger formed on inner pipeline that is arranged at inner side of wall area, where water is flowed through pipeline - Google Patents

Abstract

The protective housing has a housing wall partially formed as a wall area, and an internal heat exchanger integrated in the wall area for supplying constant ambient temperature in an inner chamber. A heat exchange is performed with the inner chamber of the protective housing. The internal heat exchanger is viewed in a cross section through the wall area and formed on an inner pipeline that is placed and arranged at an inner side of the wall area that turns toward the inner chamber of the protective housing. A cooling medium i.e. water, is flowed through the inner pipeline. An independent claim is also included for a method for regulating a temperature in a protective housing.

Description

The invention relates to instrument protective housing, in particular an instrument panel for electrical instruments and analyzers, according to the preamble of claim 1, a wall element for a protective instrument housing according to the preamble of claim 20 and a method for controlling the temperature in a protective housing according to the preamble of Claim 23.

Instrument protective housings are known in various embodiments, such as instrument protection boxes, which are relatively small in volume and are fastened to a wall and in which smaller electrical instruments are arranged. Furthermore, especially in connection with a large-scale industrial use, large-volume and large-sized protective housings are known as instrument protection houses, in which correspondingly large-scale electrical instruments and analysis devices can be accommodated and stored. Such instrument housings as protective housings are used, for example, as analysis houses for environmental measuring stations, for mobile radio stations in the telecommunications sector, for switchgear installations as rectifier housings and gas control stations. Such large-volume protective housing or instrumental protection houses are regularly constructed of a ceiling wall, side walls and a bottom wall, wherein the walls are formed by a plurality of interconnected plate-like wall elements. For example, such plate-like wall elements are formed by sandwich panels, which are each constructed of a stable outer skin and a stable inner skin and from a lying between the outer skin and the inner skin heat insulation layer. These instrument protection houses constructed in this way have the advantage over a conventional brick construction or prefabricated construction in concrete, for example, that they have a lower overall weight, which allows installation in and on buildings and / or steel structures. Furthermore, such instrument protection houses are completely transportable and can be finished in the workshop ready, for example, with heaters, air conditioning, electrical installations, lighting, pipe and cable ducts, mounting systems, etc. Compared to the conventional brick construction and prefabricated concrete, this results in significant cost savings of up to 2/3 of the total cost.

In particular, when using such instrument protection houses or protective housing in such climates where very high temperature fluctuations are given, there is a risk that it can lead to undesirable condensation in the interior of the protective housing or instrument protection house, which in turn arranged therein electrical instruments and analyzers damage or negatively influence their measurement results.

From the WO 99/08354 is already a cabinet-like housing for receiving heat-generating, electrical and / or electronic components known. For heat removal from the interior, the side walls are double-walled and each consist of an inner wall and an outer wall, between which a free space remains. The spaces in the walls are open at the bottom and at the top, that is, have a flow connection to the environment, so that when operating fans, the ambient air is sucked in on the bottom of the walls and exits the top again from the walls. As they flow through the gaps, the air streams absorb heat from the inner walls and transport this heat into the environment. The double-walled side walls are formed by hollow profile aluminum rail extrusions. In addition to this so-called external cooling circuit may also be installed in the interior of the housing, a second internal cooling circuit, which is completely separated in terms of flow from the external cooling circuit.

A similar structure is also from the DE 295 9 260 U1 in connection with a weather-protected electronic control cabinet known in which the double-walled construction, however, is achieved by means of a protective cover surrounding the cabinet. Specifically, in one embodiment, a single heat exchanger is integrated into the structure so that a heat-absorbing heat exchanger part in the cabinet itself and a heat-emitting heat exchanger part is located in the shelter. The air as a heat exchange medium is sucked through fans through the structure. Even with such a construction, satisfactory climate control of an interior of the protective housing is possible in particular in those climatic zones in which, in particular, during the day very high temperatures, so that it can lead to undesirable condensation in the interior of the protective housing.

Furthermore, from the EP 1 612 500 A2 an instrument protective housing known in which a portion of the housing wall is formed as a heat exchanger wall portion, wherein in the heat exchanger wall portion, an internal heat exchanger is integrated, by means of which a heat exchange with the interior of the protective housing can be performed. This internal heat exchanger is equipped with an external heat exchanger, by means of which a heat exchange with the outside environment of the protective housing can be carried out, connected in flow, wherein the flow-connected internal and external heat exchangers each having a predetermined receiving volume for a predetermined amount of a circulating between them in a closed system water as the heat exchange liquid. With such a construction, it must be ensured by a high outlay that the wall area is made liquid-tight.

In contrast, it is an object of the present invention to provide an instrument protective housing, in particular an instrument shelter for electrical instruments and analyzers, which is even more versatile and universally applicable and with a very good air conditioning of the interior of the instrument protective housing, in particular for providing a in the Substantially constant ambient instrument temperature in the interior of the protective housing can be achieved.

This object is achieved with the features of the independent claims. Advantageous embodiments are the subject of the dependent claims.

According to claim 1, an instrument protective housing, in particular an instrument protection house for electrical instruments and analysis devices, is provided, which has a housing wall which is at least partially designed as a heat exchanger wall region, wherein in the heat exchanger wall region, an internal heat exchanger is integrated by means which, in particular for providing a substantially constant instrument ambient temperature in the interior of the protective housing, a heat exchange with the interior of the protective housing is feasible. According to the invention, the internal heat exchanger is formed by at least one, viewed in cross section through the heat exchanger wall region, arranged on an inner side of the heat exchanger wall region facing the interior and / or laid inner pipe formed by a cooling medium or heat exchange medium, in particular water, is flowed through.

With such an inventive construction of an instrument protective housing, a functioning as a heat exchanger wall portion of an instrument protective housing is provided which can be produced without additional complex measures, for example by a corresponding pipe laid in a simple manner on the wall area and, for example, clipped becomes. The pipelines are, for example, simple, commercially available, flexible plastic hoses that can be readily arranged on the respective sides of a wall region in a desired manner or integrated into it. With such pipelines is further ensured in a simple manner that the heat exchanger wall portion can be made tight with respect to the heat exchange medium, since the cooling or heat exchange medium flows in the pipes. Overall, a production engineering simpler and thus cheaper and also reliable wall construction of an instrument protective housing can be made available.

According to a first embodiment, the cooling medium can be provided and / or withdrawn, for example, from an external, sufficiently cold cooling medium source located outside the protective housing. For example, in this connection, the cooling medium process cooling water can be withdrawn from a process plant that carries out at least one chemical and / or process-related material conversion process or material treatment process. Alternatively, if available, the cooling medium may also be formed by well or groundwater.

To ensure that there is always a sufficient amount of cooling medium, an embodiment is advantageous in this case, in which a predetermined amount of the cooling medium held in a storage container and withdrawn by means of at least one conveyor at predetermined times, for example programmatically, from the storage container ,

A storage container for the cooling medium is preferably arranged in the housing interior in connection with the aforementioned embodiments and then further preferably has a heat exchanger surface for the housing interior or arranged in the housing interior components, wherein preferably a control device is provided by means of a temperature of the cooling medium in the storage container can be detected and by means of the fresh, cooler cooling medium is supplied to the storage container, in particular in this is pumped when exceeding a defined temperature threshold in the storage tank. This can be avoided in a simple and reliable manner that is kept in the storage tank too warm, possibly not sufficient for heat exchange in the housing interior heat exchange medium.

According to a further alternative embodiment, however, it can also be provided that the inner pipe has an external, lying outside the protective housing pipe section or is fluidly connected to such a pipe section, wherein the external pipe section is formed as a geothermal heat exchanger, which is laid in the ground, for example as Hose in a cable trench of a chemical or procedural process plant is buried.

A particularly preferred, alternative embodiment according to the invention is described in more detail below:
According to this particularly preferred embodiment, it is provided that an internal heat exchanger is formed by at least one, viewed in cross section through the heat exchanger wall region, arranged on a inner side facing the interior of the heat exchanger wall region or laid inner pipe, while an external heat exchanger at least one, viewed in cross section through the heat exchanger wall region, on a side facing away from the interior and thus the outer environment of the protective housing facing outside of the heat exchanger wall region arranged or laid, outer pipe is formed. Both the inner and the outer pipe preferably have a supply line and a discharge line to a storage container arranged in a housing interior for a cooling or heat exchange medium, in particular for water, forming pipe section. The storage container is preferably arranged in a housing interior of each protective housing to be cooled or in a protective housing surrounding this, another protective housing, wherein the surrounding, further protective housing most preferably has a housing wall which in the present invention, according to the invention at least partially as a heat exchanger Wall area is formed with an external and / or internal heat exchanger.

With such a structure of an instrument protection housing, in which separate pipes are arranged or installed on both sides of the heat exchanger wall region, a simple and reliable with a mutual heat exchanger trained wall area is provided, the tight without additional complex measures with respect to the heat exchange medium can be performed, as this then flows in the pipes. As a result, the wall structure as a whole can be manufactured more easily and therefore cheaper.

With the arranged in an interior of a housing storage container for a cooling or heat exchange medium, in particular for water, it is ensured that at defined times, for example when a certain indoor temperature is exceeded, in the manner to be described hereinafter, a "fresh" to Example, cold water is transferred as a heat exchange medium in the at least one inner pipe to allow further heat exchange with the interior and thus to lower the temperature in the interior. For this purpose, it is preferably provided that the storage container is a stratified storage, in which, for example, water is stored as a heat exchange medium layered in different temperature zones, wherein by means of leading to the storage tank supply line of the inner pipe the storage tank heated, warm water can be fed while on the from Storage tank away leading discharge line of the inner pipe in contrast and thus against a defined interior temperature and / or temperature device colder water from the storage tank can be discharged. By contrast, leading to the storage tank supply line of the outer pipe to the storage tank cool water can be supplied, while on the other side leading away from the storage tank discharge line the outer pipe warmer, cooled water from the storage tank can be discharged.

The cooling or heat exchange medium, which is preferably, for example, water, can be circulated, for example, by means of gravity circulation within the respective pipeline in the circuit, in particular from a storage tank away and again circulated to this point. In this gravity circulation circulates the heat exchange medium due to the density difference in a closed circuit. In this connection, it is particularly advantageous in connection with the teaching according to the invention if, for example, at least one valve is provided per per which is formed by the at least one inner and / or the at least one outer pipe cooling circuit, which is coupled to a control and / or regulating device , which activates the valve in response to predetermined operating parameters, in particular in response to reaching predetermined temperature thresholds and thus blocks or releases a flow or circulation of the cooling or heat exchange medium at predetermined times, for example, then in conjunction with an inner pipe as an internal heat exchanger releases if the interior temperature of the protective housing should reach or exceed a defined temperature threshold. For example, further the circulation of the cooling or heat exchange medium in conjunction with the outer pipe and thus an external heat exchanger can be released when the outside temperature to a defined extent below the temperature of the cooling or heat exchange medium in the storage container, there in particular Cooling water area, should fall. The advantage of such a gravity circulation is in particular that it can be dispensed with the use of pumps and thus, for example, the function is ensured even in the event of a power failure. Furthermore, such works Gravity circulation almost noiseless. In principle, however, may also be provided in connection with the gravity circulation conveyors such as pumps, for example as additional redundancy. In connection with the gravity circulation, it is furthermore particularly advantageous if the storage tank formed as a stratified storage tank is arranged at least in part geodetically higher than the internal heat exchanger and / or the heated water to be heated from the storage tank is fed to the internal heat exchanger in a geodesic lower heat exchanger area, while the water heated in the internal heat exchanger is preferably withdrawn from the internal heat exchanger at a geodetically higher heat exchanger area and supplied to the storage tank. With these measures, preferably in their combination, the natural circulation with high reliability is provided in a simple manner.

In this context, it is particularly advantageous in connection with an external heat exchanger when the external heat exchanger to be cooled, warm water from the storage tank is supplied in a geodetically upper heat exchanger area, while the water cooled in the external heat exchanger from the external heat exchanger preferably geodätisch on a contrast deducted deeper heat exchanger area and the storage tank is supplied. This also helps to support the natural circulation in the area of an external heat exchanger.

In order to be able to circulate, in particular recirculate, the heat exchange medium within the respective pipeline in the circuit, for example away from the storage container and back to it, it is also possible, for example, to have at least one delivery device associated with the inner and / or outer conduit, in particular one Pump be provided.

These conveyors can also be run redundantly. In this case, a plurality of, in particular pumps, in particular pumps, are provided for each by the at least one inner pipe and / or the at least one outer pipe formed cooling circuit, which are coupled to a control and / or regulating device having a temperature difference between a Heat exchanger exit temperature and a heat exchanger inlet temperature of a cooling circuit detected and in the event that this detected temperature difference for a predetermined period, preferably for a period greater than 10 min., A predetermined temperature difference threshold, for example at least 3 K. , Switches from a first conveyor to a second conveyor and / or generates an alarm signal. In this context, the Applicant expressly reserves the right to formulate separate, separate claims for the above-mentioned subject matter, in particular a separate separate process claim. In this context, we expressly also allow us to further note that the term heat exchanger inlet temperature and heat exchanger outlet temperature is to be understood here in a broader sense, that is, that these temperatures can be tapped at other locations, for example in a more "middle" portion of the inner tubing or storage container, for example. Essentially, it is thus a question here of monitoring whether a heat exchange takes place via which, for example, a defect of a pump as a delivery device can be inferred.

Preferably, a control and regulating device is further provided by means of regulating the temperature in the interior of the protective housing, an interior temperature of the protective housing and / or a component temperature of a component arranged in the interior and / or a housing housing interior temperature of a component housing surrounding housing detected and with a defined Temperature threshold is comparable. Depending on this result, if the temperature threshold value is reached or exceeded, the conveying device assigned to the inner pipeline can be activated and / or a gravity circulation can be released, whereby the heat exchange medium is circulated between the inner pipe and a cooling medium source or a storage container, in particular withdrawing from a cold water area of the storage tank and feeding it to a hot water area of the storage tank until the interior temperature has cooled to a defined temperature equal to or preferably lower than the temperature threshold.

Furthermore, in the case of an external and internal heat exchanger, it may be provided that the outside temperature of the outside environment of the protective housing can be detected by means of one or the control and / or regulating device and is comparable to a defined outside temperature threshold, so that when the outside temperature is reached or fallen short of -Threshold the outer pipe associated conveyor can be activated or a gravity circulation is releasable, which then the heat exchange medium as long circulating in the circuit between the outer pipe and the storage tank, in particular from a hot water area of the storage tank and feeding a cold water area of the storage tank, circulating until the Chilled water temperature in the storage container is cooled to a defined temperature, in particular cooled to such a defined temperature, which is substantially equal to the outside temperature.

With such a control and / or regulating device can thus be achieved in a functionally reliable and advantageous manner, both a heat dissipation from the interior of the protective housing as well as a heat transfer to the outside environment, in conjunction with the release of heat to the outside environment while cooling the Water, which in turn can then be stored as cold water in the storage tank layered to be deducted from there then to cool the interior of the circuit of the inner pipe.

It is understood that instead of water in principle, another heat exchange medium can be used, as long as it is ensured that the operation described above can be performed functionally reliable.

According to a particularly preferred mode of operation, the outside temperature threshold value is set so that the conveyor associated with the outer pipeline is only activated or the gravity circulation is released only when the outside temperature is smaller than the temperature of the cold water area of the storage container by a defined amount.

In order to provide the largest possible area for heat exchangers, it is preferably provided that the inner and / or the outer pipeline extend over at least a portion of the heat exchanger wall region, in particular there in a defined pattern spaced from an adjacent pipe section and / or serpentine and / or laid meandering.

For an unimpeded heat exchange, it is particularly preferred if the outer and / or inner pipe are stored or laid on the inner or outer side of the heat exchanger wall region substantially freely accessible on the heat exchanger wall region. The latter is particularly advantageous in connection with a design which is also claimed in a very general manner, in which the inside and / or the outside of the heat exchanger wall region is or are covered with a cover made of a thermally conductive material, in particular aluminum. A particularly good heat exchange or a particularly good heat conduction can be achieved in that the cover rests in a system connection to the respective associated pipe section.

Basically, there are various ways to form a thermal insulation of the outer and inner pipe. This is preferably formed by a heat-insulating material, preferably by a heat-insulating foam material, for example a plastic foam, such as a polyurethane foam. With such a heat-insulating material, a functionally reliable and reliable thermal insulation between the inside and the outside of the heat exchanger wall region is ensured. In addition, can be made with such a heat-insulating material in a simple manner the heat exchanger wall area forming, manageable plate-like wall element. Preferably, the at least one inner and outer pipe is preferably foamed into the heat-insulating foam material substantially flush with the surface or laid on the surface of the heat-insulating material. As an alternative to this, the at least one inner and / or outer pipeline can also be recessed into the surface in groove-shaped recesses formed on the surface of the heat-insulating material, preferably flush with the surface. In this case, the pipelines can then be fixed at least in sections by, for example, clips or the like on the surface. In principle, however, it is also possible to design the groove-shaped recesses in such a way that the pipes are held therein in a frictional and / or form-fitting manner.

The outer pipe is further preferably guided in a transition region between the outside and the inside of the heat exchanger wall portion through the thermal insulation into the interior. This makes it possible to achieve a compact construction of the particular plate-like wall elements without much additional piping.

Preferably, the protective housing is formed by a plurality of plate-like wall elements, which are at least partially formed according to the invention.

Claim 23 claims a wall element according to the invention for a protective housing, in which at least one pipeline, viewed in cross section through the heat exchanger, is arranged and / or laid on at least one plate side of the wall element, preferably a first and a second pipeline, viewed in cross section, are arranged and / or laid on opposite sides of the wall panel. The at least one pipe preferably has in each case one a feed line and one each a discharge line forming or connectable to such a pipe section, which with a storage container for a cooling or Heat exchange medium, in particular water or with an external cooling medium source, for example, ground or well water or cooling water on a process plant, or with an external geothermal heat exchanger can be connected. Such a plate-shaped wall element can be easily handled and transported, wherein it is also ensured that with such wall elements in a simple manner, an inventive instrument protective housing can be constructed.

Preferably, the wall element is designed as a sandwich element with a thermal insulation as an intermediate layer, which is covered on the first and / or second plate side and optionally in the end region with a cover made of a thermally conductive material, for example an aluminum material. For example, the cover can have a material thickness of up to 5 mm. The at least one pipe is arranged in the region between the thermal insulation and the respective associated cover and is preferably on the cover in an investment connection. With such a cover on the front panel and on the back of the plate a stable outer skin or inner skin and thus a wall element is provided, which has a high moment of inertia and therefore is particularly well suited to be installed in particular in large-volume instrument protective housings, which are optionally exposed to high loads or stresses, for example when used in harsh regions.

As already stated above, for a good heat exchange between the outside environment on the one hand and the interior on the other hand, a laying of the pipes over basically the entire wall element surface is preferred, the pipelines then be spaced in a defined pattern to an adjacent pipe section serpentine or meandering laid can.

With the above-described instrument protective housing according to the invention or with the previously described wall element for such an instrument protective housing, a protective housing can thus be produced which can be used in a variety of ways and in a highly variable manner, in particular also in regions with extreme temperature fluctuations, as described, for example, in US Pat very hot regions is the case. If, for example, there during the day, when very hot outside ambient temperatures prevail, the temperature rises in the interior of the housing, can be made via the inner heat exchanger formed by the inner heat exchanger such a temperature control by means of a control and / or regulating device that the interior temperature of the protective housing substantially is kept at a constant value, whereby, for example, condensation processes are avoided or for arranged in the instrument protective housing components critical temperatures are not exceeded. This leads, in conjunction with a stratified storage tank as a storage container but also to an increased storage of hot heat exchange medium, in particular of water in the stratified tank. In order to provide this storage container again for a heat exchange colder cold water available, the external heat exchanger is provided, is guided in the hot water through the outer pipe and there heat to the outside environment, so that in turn stored after this external heat exchange cold water in the storage tank can be. In this storage tank, cold water, which is heavier than warm water, sinks down while warm water rises. Accordingly, different layer regions or temperature zones will thus be formed in the storage container. It is understood that, for this purpose, the storage container is preferably thermally insulated toward the outside, that is, to the interior of a protective housing. In principle, a plurality of such storage containers can be provided. However, this does not change the operation and the basic structure of the solution according to the invention.

The above applies in a figurative sense also for the case that no stratified storage tank is used as a storage tank and in the protective housing wall no external or external heat exchanger is provided, for example, in the event that the cooling medium by process cooling water or ground or well water is formed or in the event that the inner pipe is coupled to a geothermal heat exchanger. Here, too, can be controlled or regulated accordingly by means of a control and / or regulating device such a temperature control that the interior temperature of the housing to be cooled is kept substantially at a constant value.

The statements just made show that an instrument protection housing according to the invention can maintain a constant temperature in the interior of the protective housing in a particularly simple and advantageous manner, particularly in those climatic regions in which significant temperature fluctuations are present, that is, for example very high Daytime temperatures and on the other hand very low night temperatures, as is the case for example in desert regions. Even short-term temperature peaks can be reduced very well with the solution according to the invention. Thereby can thus be easily avoided that the internally arranged instruments and devices are heated above their allowable maximum temperature. In particular in this context, according to a later aspect of the invention, it may be of considerable advantage that a control and / or regulating device is provided by means of which a device and / or instrument temperature is detected as the component temperature of at least one component arranged in an inner space of the protective housing, wherein at a defined temperature threshold reaching or exceeding component temperature of the control and / or regulating device associated with an inner pipe conveyor or in the case of gravity circulation, for example, a valve is controlled, so that the heat exchange medium then as long as in the circuit between the inner pipe and the storage container is recirculated until the component temperature has cooled to such a defined component temperature, which is equal to or preferably lower than the temperature threshold value. Such a process control is preferred primarily to the interior temperature-controlled process control or operating mode, since this can be avoided in any case that particularly sensitive components, such as computers, get through, for example, control-related inertia in a critical temperature range. This means that an existing anyway for the regulation of the interior temperature control and / or regulating device can be used in an advantageous dual function with additional control tasks and thus can be advantageously adapted to the needs of the respective components. Once the component temperature or the component temperatures are then again in the desired range, can be moved back to the interior temperature-controlled control. It is self-evident that this regulation, which is guided in the interior of the room temperature and / or component temperature-controlled, can of course be program-controlled.

An embodiment of the present invention will be explained in more detail with reference to a drawing.

Show it:

1 FIG. 2 is a schematic plan view of a wall element according to the invention forming a heat exchanger wall region, which, for example, forms part of an instrument protective housing, FIG.

2 a view of the wall element of 1 in the direction of arrow B of 1 .

3 a section along the line AA the 1 .

4 schematically a perspective view of the wall element according to 1 .

5 2 shows schematically a cross section through a wall element according to the invention in conjunction with a protective housing shown here only in an extremely schematic and dot-dash manner, in the interior of which a stratified storage tank is arranged as a storage container,

6 schematically an alternative embodiment with in each case per cooling circuit second pump,

7 schematically an alternative embodiment with only an internal heat exchanger, which is fed by a well with cooling water, and

8th schematically another alternative embodiment of a protective housing or wall element with gravity circulation.

In the 1 to 4 is in different perspective and sectional views of a plate-shaped wall element 1 shown, which is designed as a sandwich element and here by way of example and specifically one, a thermal insulation of a thermally insulating material having intermediate layer 2 , For example, of a PU foam, which on the opposite sides of the plate with an aluminum plate, for example 3 . 4 is covered over the entire area. The in the picture plane the 1 and 4 The front aluminum plate is shown here only partially to show the underlying piping structure described below.

As already stated, is on the interlayer 2 one pipe each on the opposite sides 5 . 6 laid serpentine or meandering, wherein the adjacent pipe sections from each other have, for example, the same distance. The laying takes place here in a defined pattern over the entire surface of the wall element 1 ,

The aluminum plates 3 . 4 lie, as this particular from the 3 shows, in a flat system connection to the pipes 5 . 6 in turn, in just out of the 4 apparent, surface-side grooves 7 the intermediate layer 2 einliegen and there, for example, form-fitting and / or frictionally engaged and / or held by clips not shown here.

How this in particular from the synopsis of 1 to 4 with the 5 indicates the inner pipe 5 and the outer pipe 6 in each case a pipeline section, which has a supply line 8th (inner pipe) and a supply line 10 (outer pipe 6 ) to a designed as a layer memory storage container 12 forms or transforms into such. The wall element shown here only schematically 1 is preferred part of a protective housing shown here in phantom 20 , which instrument protective housing 20 is formed and constructed of a plurality of such sandwich-like wall elements, wherein, for example, a plurality of such inventive wall elements 1 with inner and outer piping 5 . 6 may be provided, which is not shown here.

In the from the storage tank 12 in which, for example, water is taken up as a heat exchange medium, to the inner pipe 5 and thus to the inner heat exchanger led discharge line 11 is as well as in the storage container 12 to the outer pipeline 6 and thus to the outer heat exchanger led discharge line 9 one pump each 13 respectively 14 arranged, by means of in connection with the inner pipe 5 via the discharge line 11 Cold water from the bottom of the storage tank 12 drawn off and in circulation via the inner pipe 5 and the supply line 8th back to the storage tank 12 can be pumped. Like from the 5 it can be seen, the supply takes place in an upper hot water area of the storage container 12 after a successful heat exchange with the interior 15 of the protective housing 20 ,

With reference to the outer heat exchanger, hot water to be cooled is by means of the pump 14 via the discharge line 9 to the outer pipe 6 pumped, which then the outer pipe 6 flows through and gives off heat to the environment, so that then cooled water in the storage tank 12 , there in a cold water area, flows in.

The control of the pumps 13 . 14 done by means of a control and / or regulating device 16 which, for example, programmatically inside the protective housing 20 is arranged and coupled with temperature sensors Ti and Tu, on the one hand, the interior temperature of the interior 15 of the protective housing 20 (Ti) and on the other hand, the outside ambient temperature (Tu) capture.

If it is determined by the control and / or regulating device, for example, that the interior temperature exceeds a predetermined threshold value, the pump is thus 13 controlled and corresponding cold water into the inner pipe 5 pumped or conveyed, while hot, hot water through the supply line 8th is stored in the hot water area of the storage container. The cold water is pumped 13 while in the pipeline 5 promoted until cold water is in the inner pipe to a defined extent, which then with the interior 15 of the protective housing 13 , through the aluminum plate 4 through a heat exchange.

This reduces the temperature in the interior 15 of the protective housing 20 below the threshold. If, at a later point in time, a temperature rise is again detected which exceeds the threshold value, the process just mentioned is repeated.

To ensure that there is sufficient cold water for the internal heat exchange in the storage tank, by means of the control and / or regulating device at predetermined times in the manner described above, a defined amount of hot water to be cooled in the outer pipe 6 pumped. This has already been described in detail above.

The 6 schematically shows an alternative embodiment, each per cooling circuit second pump 13a . 14a in the event of a failure of the pump 13 or 14 can be switched, if by means of the control and / or regulating device 16 a temperature difference between a heat exchanger outlet temperature and a heat exchanger inlet temperature of the respective cooling circuit is detected, which for a predetermined period, preferably for a period greater than 10 min., Does not exceed a predetermined temperature difference threshold, for example at least 3 K. , If necessary, an alarm signal can also be generated for this purpose.

The 7 schematically shows a further alternative embodiment of the 5 with only one internal heat exchanger, by a well 17 with cooling water 18 is fed. This circuit is the pump 13 assigned, which is controlled by a control and / or regulating device, not shown here according to predetermined parameters.

In the 8th Finally, a further alternative embodiment is shown, which substantially corresponds to the structure, as shown in the 5 is shown, wherein like components are designated by like reference numerals. In contrast to the embodiment according to 5 is however in the embodiment after 8th a gravity circulation within the respective pipelines, which form the internal and external heat exchanger, to Circulation of, for example, water provided as a cooling or heat exchange medium. For this purpose, specifically designed as a stratified storage tank 12 arranged geodetically higher than the internal and external heat exchanger, wherein the aufzuheizende, cool water from the storage tank 12 the internal heat exchanger in a geodetic lower heat exchanger area 19 is supplied while the heated in the internal heat exchanger water from the internal heat exchanger at a geodetically higher compared to the heat exchanger area 21 withdrawn and fed to the storage container. The external heat exchanger is the cooled, warm water from the storage tank 12 in the geodesic upper heat exchanger area 21 supplied while the water cooled in the external heat exchanger from the external heat exchanger at the opposite geodetically deeper heat exchanger area 19 deducted and the storage container 12 is supplied.

Pro formed by the at least one inner and outer pipe cooling circuit is here a valve 13b (inner pipe) and 14b (Outer pipe) provided that is respectively coupled to the control and / or regulating device, which the valves 13b . 14b like this in the 8th schematically represented by dashed lines, depending on predetermined temperature thresholds so control that a circulation or flow of cooling or heat exchange medium in the individual cooling circuits is released only at defined, predetermined times, otherwise remains locked. The criteria here are essentially analogous to those previously described in connection with the pump designs.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 99/08354 [0004]
• DE 2959260 U1 [0005]
• EP 1612500 A2 [0006]

Claims (28)

Instrument protective housing, in particular instrument protection housing for electrical instruments and analyzers, with a housing wall which is at least partially designed as a heat exchanger wall region, wherein in the heat exchanger wall region, an internal heat exchanger is integrated, by means of which, in particular to provide a substantially constant Instrumentenumgebungstemperatur in Interior of the protective housing, a heat exchange with the interior of the protective housing is feasible, characterized in that the internal heat exchanger by at least one, viewed in cross section through the heat exchanger wall region, arranged on a side facing the interior of the heat exchanger wall region and / or laid, inner pipe is formed, which is flowed through by a cooling medium, in particular water. Protective housing according to claim 1, characterized in that the cooling medium, preferably water, withdrawn from an external, lying outside the protective housing cooling medium source and / or is provided. Protective housing according to claim 2, characterized in that the cooling medium is process cooling water from at least one chemical and / or procedural material conversion process or material treatment process performing process plant or well or groundwater, which is preferably kept in a storage container. Protective housing according to one of claims 1 to 3, characterized in that a storage container for the cooling medium in the housing interior is arranged and forms a heat exchanger surface for the housing interior or arranged in the housing interior components, preferably a control device is provided by means of a temperature of the cooling medium in Storage tank can be detected and fed by means of the fresh, cooler cooling medium in the storage tank when freshly exceeded a defined temperature threshold, in the storage tank, in particular pumpable. Protective housing according to claim 1, characterized in that the inner pipe has an external, lying outside the protective housing pipe section or is flow connected to such, wherein the external pipe section is formed as a geothermal heat exchanger, which is laid in the ground. A protective housing according to claim 1, characterized in that at least one, external to the heat exchanger, external heat exchanger is provided, by means of which a heat exchange with the external environment of the protective housing is feasible, wherein the external heat exchanger through at least one, in cross section through the heat exchanger wall region considered, on a side facing away from the interior and thus the outer environment of the protective housing facing outside of the heat exchanger wall region arranged and / or laid, outer pipe is formed. Protective housing according to claim 6, characterized in that both the inner and the outer pipe have a supply line and a discharge line to a housing disposed in the housing storage container for a heat exchange medium, in particular for water forming pipe section, wherein the storage container preferably in a housing interior of each is arranged to be cooled protective housing or in a protective housing surrounding this further protective housing, wherein the surrounding, further protective housing most preferably also has a housing wall which is at least partially formed as a heat exchanger wall region with an external and / or internal heat exchanger. Protective housing according to claim 7, characterized in that the storage container, preferably a thermally insulated storage container to the outside, is formed as a layer memory, in which the preferred water is stored as a heat exchange medium layered in different temperature zones, that by means of the storage container leading to the feed line of the inner tube the heated storage tank heated, can be discharged from the storage container via the leading away from the storage container discharge line of the inner pipe and thus against a defined indoor temperature and / or device temperature colder water, and that by means of leading to the storage tank supply line of the outer pipe to the storage tank cool water can be supplied, while on the way away from the storage tank discharge line of the outer pipe is warmer, cooled water from the storage tank can be discharged. Protective housing according to one of claims 1 to 8, characterized in that the cooling or heat exchange medium, in particular water, circulated by means of gravity circulation within the respective pipe in the circuit, in particular from a storage tank and back to this is provided, it is preferably provided that at least one valve is provided per per formed by the at least one inner and / or the at least one outer pipe cooling circuit, which is coupled to a control and / or regulating device, the valve as a function of predetermined operating parameters, in particular depending on the achievement of predetermined temperature thresholds, controls and so locks a flow of cooling or heat exchange medium at predetermined times or releases. Protective housing according to claim 9, characterized in that the layer formed as a storage container geodetically arranged higher than the internal heat exchanger and / or the heated water to be heated from the storage tank the internal heat exchanger in a geodetically lower heat exchanger area can be fed while heated in the internal heat exchanger Water from the internal heat exchanger preferably on a contrast geodetically higher heat exchanger area removable and the storage container can be fed. Protective housing according to one of claims 6 to 8 and claim 9 or 10, characterized in that the external heat exchanger to be cooled, warm water from the storage tank in a geodetically upper heat exchanger area can be supplied while the water cooled in the external heat exchanger from the external heat exchanger preferably at in contrast geodetically deeper heat exchanger area removable and the storage container can be fed. Protective housing according to one of claims 1 to 11, characterized in that the at least one pipe, at least one conveying device, preferably an inner and an outer pipe each at least one conveyor, in particular a pump is assigned, by means of the heat exchange medium within the respective pipe in the circuit can be recirculated, in particular from a storage tank and back to this recirculating, in particular umpumpbar, wherein it is preferably provided that per per formed by the at least one inner pipe and / or the at least one outer pipe cooling circuit several, especially two, conveyors, especially pumps are provided, which are coupled to a control and / or regulating device which detects a temperature difference between a heat exchanger outlet temperature and a heat exchanger inlet temperature of a cooling circuit and in the event that this erfas ste temperature difference for a predetermined period, preferably a period greater than 10 min, does not exceed a predetermined temperature difference threshold, switches from a first conveyor to a second conveyor and / or generates an alarm signal. Protective housing according to one of claims 1 to 12, characterized in that a control and / or regulating device is provided by means of regulating the temperature in the interior of the protective housing, an interior temperature of the protective housing and / or a component temperature of a arranged in the interior of the protective housing component and / or a housing housing interior temperature of a component housing housing is detected and comparable with a defined temperature threshold, such that upon reaching or exceeding the temperature threshold, the inner pipe associated conveyor can be activated or a gravity circulation is releasable, so that the heat exchange medium circulating in the circuit between the inner pipe and a cooling medium source or a storage container, in particular deducting from a cold water region of the storage container and a hot water area, circulating t until the interior temperature has cooled to such a defined temperature which is equal to or preferably lower than the temperature threshold. Protective housing according to one of claims 6 to 13, characterized in that by means of a control and / or regulating device, the outside temperature of the external environment of the protective housing detectable and comparable with a defined outside temperature threshold, such that when reaching or falling below the outside temperature threshold the conveying means associated with the outer pipe can be activated or a gravity circulation can be released, so that the heat exchange medium circulates in the circuit between the outer pipe and the storage tank, in particular withdrawing from a hot water area of the storage tank and circulating to a cold water area of the storage tank, until the cold water temperature in the storage tank is cooled to a defined temperature, in particular cooled to such a defined temperature, which is substantially equal to the outside temperature. Protective housing according to claim 14, characterized in that the outside temperature threshold is predetermined so that the outer pipe associated conveyor only activated or the gravity circulation is only released when the outside temperature is smaller than the temperature of the cold water area of the defined extent storage container. Protective housing according to one of claims 1 to 15, characterized in that the inner and / or the outer pipe surface extends over at least a portion of the heat exchanger wall portion, in particular there in a defined pattern spaced to an adjacent pipe section and / or serpentine or meandering laid. Protective housing according to one of claims 1 to 16, characterized in that the outer and / or inner pipe is freely accessible on the inside or outside of the heat exchanger wall region for unhindered heat exchange with the interior or the external environment stored on the heat exchanger wall region , Protective housing according to one of claims 1 to 17, characterized in that the inside and / or the outside of the heat exchanger wall portion is covered with a cover made of a thermally conductive material, in particular aluminum, or are, is preferably provided that the cover abuts in a system connection to the respective associated pipe section. Protective housing according to one of claims 6 to 18, characterized in that the thermal insulation between the outer and inner pipe by a heat-insulating material, preferably a heat-insulating foam material, most preferably a plastic foam, is formed. Protective housing according to one of claims 1 to 19, characterized in that the at least one inner and / or outer pipe in a heat-insulating material, preferably flush, foamed or laid on the surface of the heat-insulating material or formed on the surface of the insulating material groove-like depressions , preferably flush with the surface, is recessed. Protective housing according to one of claims 6 to 20, characterized in that the outer pipe is guided in a transition region between the outside and the inside of the heat exchanger wall portion through the thermal insulation into the interior. Protective housing according to one of claims 1 to 21, characterized in that the housing wall is formed by a plurality of interconnected plate-like wall elements, and that at least one of these wall elements forms a heat exchanger wall portion. Wall element for an instrument protective housing, in particular for an instrument protection housing for electrical instruments and analysis devices, in particular according to one of Claims 1 to 22, having at least one heat exchanger integrated in the plate-shaped wall element, in particular with heat exchangers thermally insulated from one another on opposite sides of the wall element, characterized in that at least one pipe, viewed in cross-section through the heat exchanger, is arranged and / or installed on at least one plate side of the wall element, preferably a first pipeline and a second pipeline, viewed in cross-section, arranged on opposite sides of the wall element and / or are laid. Wall element according to claim 23, characterized in that the at least one pipe has a feed line and a discharge line forming or connectable to such a pipe section connectable to a storage container for a heat exchange medium, in particular water, or with an external cooling medium source or with an external geothermal heat exchanger is. Wall element according to claim 23 or 24, characterized in that the wall element is a sandwich element with a thermal insulation as an intermediate layer on the first and / or second plate side and optionally in the frontal region with a cover made of a thermally conductive material, in particular aluminum, the preferably has a material thickness of up to 5 mm, is covered, and that the at least one pipe is disposed in the region between the thermal insulation and the respective associated cover, in particular abuts the cover in an abutment connection. Wall element according to one of claims 23 to 25, characterized in that extending the at least one pipe surface over at least a portion of the respective plate side, in particular there in a defined pattern spaced to an adjacent pipe section and / or serpentine or meandering laid. Method for controlling the temperature in a protective housing, in particular in a protective housing according to one of claims 1 to 22, characterized in that a control and / or regulating device is provided, by means of a device and / or instrument temperature as the component temperature of at least one in a Interior of the protective housing arranged component and / or a receiving housing interior temperature of the receiving at least one component receiving housing, which receiving housing is disposed in the interior of the protective housing, is detected that in a one defined temperature threshold reaching or exceeding component temperature and / or receiving housing interior temperature of the control and / or regulating device associated with an inner pipe conveyor or in the case of gravity circulation valve is controlled, so that the heat exchange medium as long as in the circuit between the inner pipe and a cooling medium source or a storage container for the cooling medium is circulated until the component temperature and / or the housing housing interior temperature has cooled to such a defined temperature which is equal to or preferably lower than the temperature threshold value. A method according to claim 27, characterized in that the process control according to claim 27 prior to that according to claim 13 and / or claim 14.

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