Cooling and heating system for a building and associated method of adapting the temperature in a building

Abstract

A cooling and heating system for a building (100) is described with a device (50) for adjusting the temperature level, which is designed to transport a heat transfer medium in at least one circuit from a respective first temperature level to a respective second temperature level. A pipe system (60) comprises a supply line arrangement (61) and a return line arrangement (62), in which the heat transfer medium circulates in the at least one circuit between the device (50) for adjusting the temperature level and a consumption arrangement. A plurality of window modules (1; 1-i; 1-j) is provided as the consumption arrangement, which are designed for thermal regulation, comprising heating or cooling, of the building interior, wherein the plurality of window modules (1; 1-i; 1-j) are arranged in at least two facade areas (111, 112) oriented in different cardinal directions in one or more levels (101- 103) of the building (100). One or more switching devices (91-98) controllable by a control unit (25) are arranged in the pipe system (60), wherein, depending on a first or second switching position, the supply line following the relevant switching device (91-98) in the flow direction is fed by the device (50) for adjusting the temperature level with the heat transfer medium of the circuit whose second temperature level is selected / controlled depending on a desired operating mode.

Description

[0001] P3514PC00 Subsequent Application

[0002] 1

[0003] HyWin GmbH c / o Ernst Treuhand & Wirtschaftsberatungs AG

[0004] Hintermattli strasse 1

[0005] 5506 Magenwil

[0006] Switzerland

[0007] Cooling and heating system for a building

[0008] Description

[0009] The invention relates to a cooling and heating system for a building and a method for thermal regulation of a building by means of a cooling and heating system.

[0010] A window module for thermal regulation, which enables a building to be heated or cooled, is known, for example, from EP 3 320 275 Bl. The window module described therein comprises exterior glazing and interior glazing. The exterior glazing has a lower heat transfer coefficient than the interior glazing in order to thermally regulate the interior of the building via the interior glazing. An intermediate space sealed against solids, in particular dust, is formed between the exterior glazing and the interior glazing. An air-liquid heat exchanger is arranged in the intermediate space. The air-liquid heat exchanger comprises a fluid-flow cooling / heating element with a fluid line in which a heat transfer medium is guided. When the window module is installed, the air-liquid heat exchanger is arranged horizontally at the bottom or top of the intermediate space so that air from the intermediate space can flow through the air-liquid heat exchanger. When the window module is installed, a fan of the window module is arranged horizontally at the top or bottom of the intermediate space. This can be operated in a cooling mode and in a heating mode as operating modes of the window P3514PC00 Subsequent Application

[0011] 2 module, wherein at least in the cooling mode air is guided through the air-liquid heat exchanger by the fan in order to exchange heat between the air and the heat transfer medium and to guide the air in the intermediate space in a circuit. The window module further comprises a separating element arranged in the intermediate space, which runs parallel to the exterior glazing and the interior glazing and divides the intermediate space into an inner intermediate space and an outer intermediate space in order to generate a rising and a falling air flow in the intermediate space.

[0012] The object of the invention is to provide a cooling and heating system for buildings with a window module of the type mentioned at the beginning, which enables efficient thermal regulation of the building in a simple manner.

[0013] It is further the object of the invention to provide a method which allows improved thermal regulation of a building by means of a cooling and heating system.

[0014] These objects are achieved by a window module according to the features of claim 1 and a method according to the features of claim 20. Advantageous embodiments can be found in the dependent patent claims.

[0015] According to a first aspect, a cooling and heating system using window modules based on the design principle of the aforementioned EP 3 320 275 Bl is proposed as a solution. The cooling and heating system comprises a device for adjusting the temperature level, a pipe system, a plurality of window modules and one or more switchable devices that can be controlled by a control unit.

[0016] The device for adjusting the temperature level is designed to transport a heat transfer medium from a respective first temperature level to a respective second temperature level in at least one circuit. Such a device can be, for example, a power heating machine, such as a heat exchanger, a heat pump, a transfer station of a district heating grid or a combustion-based heating system (e.g. pellet heating, gas heating or oil heating, etc.). The first temperature level can be higher than the second temperature level. The first temperature level can also be lower than the second temperature level. P3514PC00 Subsequent Application

[0017] 3

[0018] The pipe system comprises a supply line arrangement and a return line arrangement in which the heat transfer medium circulates in at least one circuit between the device for adjusting the temperature level and a consumption arrangement. The supply line arrangement and the return line arrangement can be designed as a so-called 2-pipe system or 4-pipe system. The heat transfer medium is fed from the device for adjusting the temperature level at the second temperature level into the supply line arrangement in the direction of the consumption arrangement and is received by the return line at the first temperature level.

[0019] The plurality of window modules constitutes the consumption arrangement, wherein these are designed for thermal regulation, comprising heating or cooling, of the interior of the building. The plurality of window modules are arranged in at least two facade areas oriented in different cardinal directions in one or more levels of the building. In other words, this means that each of the at least two facade areas comprises a plurality of window modules arranged horizontally in one level and / or window modules arranged vertically adjacent to each other in several levels. Window modules arranged horizontally adjacent to one another constitute window modules on the same level or floor. Window modules arranged vertically one above the other are arranged on different levels or floors. The window modules enable thermal regulation of the building, wherein the thermal regulation comprises heating or cooling of the building.

[0020] A respective window module comprises an exterior glazing and an interior glazing, wherein the exterior glazing has a lower heat transfer coefficient than the interior glazing in order to thermally regulate the interior of the building via the interior glazing, and wherein an intermediate space sealed against solids, in particular dust, is formed between the exterior glazing and the interior glazing. The window module further comprises an air-liquid heat exchanger, which comprises a fluid-flow cooling / heating element with a fluid line in which a heat transfer medium is guided, wherein the at least one air-liquid heat exchanger is arranged horizontally at the bottom or top in the intermediate space when the window module is installed, so that air from the intermediate space can flow through it. The window module further comprises a fan, which is arranged horizontally at the top or bottom in the intermediate space when the window module is installed and which can be operated in a P3514PC00 Subsequent Application

[0021] 4 cooling mode and in a heating mode as operating modes of the window module, wherein at least in the cooling mode air is guided through the air-liquid heat exchanger by the fan in order to exchange heat between the air and the heat transfer medium and in order to circulate the air in the intermediate space. Finally, the window module comprises a separating element arranged in the intermediate space, which runs parallel to the exterior glazing and the interior glazing and divides the intermediate space into an inner intermediate space and an outer intermediate space in order to generate a rising air flow and a falling air flow in the intermediate space. The window module further comprises a controllably adjustable sun protection device as a sun protection function, which is arranged in the outer intermediate space and, in particular, directly adjoins the exterior glazing, so that when the sun protection function is activated, the outer intermediate space is formed completely or essentially between the sun protection device and the separating element.

[0022] The underlying principle of the proposed window module is to exchange heat between the air in the intermediate space and the heat transfer medium flowing in the air-liquid heat exchanger. Depending on the temperature of the heat transfer medium, the air can then be cooled or heated. The cooled or heated air can be used to thermally regulate the interior of the building, hereinafter also referred to as conditioned usable space, via the interior glazing.

[0023] The exterior glazing constitutes a highly insulating glazing that insulates the window module and the interior of the building from the outside environment. In contrast, the interior glazing is simple glazing or safety glazing, as small amounts of heat are released or absorbed due to the controlled temperature in the intermediate space of the window module. As the exterior glazing is the highly insulating glazing, the window module enables the thermal regulation of the building. The difference between the heat transfer coefficient Ua of the exterior glazing and Ui of the interior glazing can be smaller than the heat transfer coefficient Ui of the interior glazing by a factor of at least 3, in particular by a factor of 5 or more, depending on whether the window module is to be used only for cooling or also for heating.

[0024] For example, the exterior glazing (e.g. as multiple glazing) can have a Ugvalue of 0.6 W / m2K. The interior glazing typically has a U-value of approx. 5.8 W / m2K. This results in a factor of 10 by which the heat transfer coefficient Ui of the interior glazing is greater than the P3514PC00 Subsequent Application

[0025] 5 heat transfer coefficient Ua of the exterior glazing. It goes without saying that other U-values are used when other glazing is used.

[0026] The function of the separating element is to divide the intermediate space into the inner intermediate space and the outer intermediate space to allow rising and falling air flow in the intermediate space. The solar shading function serves to regulate the amount of sunlight entering the interior of the building by setting the level of overlap with the window light automatically or by a user, allowing the daylight intensity in the conditioned usable space to be set.

[0027] If the window module is exposed to sunlight, the components arranged in the intermediate space, such as frame elements of the window module, are heated by the solar radiation, whereby heat is transferred to the air, particularly in the outer intermediate space of the window module. The heat input can be regulated by the sun protection function. The heated air in the outer intermediate space of the window module is circulated with the help of the fan in the intermediate space of the window module, wherein the heated air is guided through the air-liquid heat exchanger. Heat is transferred to the heat transfer medium of the air-liquid heat exchanger via the air-liquid heat exchanger, whereby cold or colder air enters the inner intermediate space. The heat transfer medium dissipates the heat generated by solar radiation in the intermediate space of the window module. If the temperature of the air in the inner intermediate space is brought below the temperature of the interior of the building, the interior of the building can be cooled. The fan then transports the air back from the inner intermediate space to the outer intermediate space.

[0028] If, on the other hand, the interior of the building is to be heated, the air flowing from the outer intermediate space into the air-liquid heat exchanger is heated via the heat transfer medium, whereby warmer air enters the inner intermediate space. If the temperature of the air in the inner intermediate space is brought above the temperature of the interior of the building, the interior of the building can be heated.

[0029] The direction in which the air is guided in the intermediate space in the circuit is the same in both cooling and heating mode. This means that the fan does not need to change its direction P3514PC00 Subsequent Application

[0030] 6 of rotation. As a result, there is no need to provide a technically complex fan, as the air is always transported in the same direction, regardless of the operating mode of the window module.

[0031] As the intermediate space only needs to be sealed against solids, in particular dust, but is otherwise open to diffusion in relation to the usable space, there is no need to supply dried air to prevent condensation in the intermediate space of the window module. This simplifies the design of the window module and saves considerable costs for the provision of dried air with low overpressure.

[0032] The fact that the controllably adjustable sun protection device is adjoined to the exterior glazing, in particular directly (i.e. without or without a significant intermediate space), so that when the sun protection function is activated the outer intermediate space is formed completely or essentially between the sun protection device and the separating element, results in a less turbulent flow of air in the intermediate space. Due to an optimized flow, there is less vibration and less mechanical stress on the components of the window module arranged in the intermediate space. In addition, the window module can be operated with higher efficiency and lower noise levels. The adjoinment of the sun protection device to the exterior glazing also results in a lower heat input into the (outer) intermediate space of the window module if the sun protection device is activated.

[0033] The one or more switchable devices, which can be controlled by a control unit, are arranged in the pipe system. Depending on a first or second switching position, the supply line following the relevant switching device in the direction of flow is fed by the device for adjusting the temperature level with the heat transfer medium of the circuit whose second temperature level is selected or controlled depending on a desired operating mode.

[0034] The operating mode generally comprises heating and cooling. More generally, this means different flow temperatures for the window modules in the building or parts of the building or usable spaces. For example, usable spaces associated with a south-facing facade area could be operated with a first flow temperature, while usable spaces associated with another facade P3514PC00 Subsequent Application

[0035] 7 area, e.g. with a north-facing orientation, could be operated with a comparatively higher second flow temperature. This enables decentralized dew point shifts in particular.

[0036] According to an expedient embodiment of the window module, the intermediate space formed between the exterior glazing and the interior glazing is larger than 150 mm in order to guide a sufficient volume of air in the intermediate space in a circuit. The distance formed between the interior glazing and the exterior glazing is selected in particular depending on the type (in particular performance class) of the air-liquid heat exchanger and its installation position and can also be larger or significantly larger than the aforementioned 150 mm.

[0037] According to a further expedient embodiment of the window module, the separating element guides the air flow exiting the heat exchanger into the inner intermediate space in order to be returned via the outer intermediate space. As the interior glazing has a greater heat transfer coefficient than the exterior glazing, the controlled temperature in the intermediate space of the window module allows a desired amount of heat or cold to be emitted towards the usable space.

[0038] According to a further expedient embodiment of the window module, the sun protection device is made of a material that absorbs and reflects solar radiation and is controllably adjustable in such a way that the daylight intensity in the usable space can be set. The sun protection device can, for example, be embodied as a roller blind, double roller blind, Venetian blind, textile curtain and the like. The sun protection device can also be integrated into the exterior glazing as switchable glass. For example, electrochromic glass, such as that sold by the company SageGlass®, can be used for this purpose. In this case, it is not necessary to provide an additional, mechanically designed sun protection device (roller blind, Venetian blind, etc.) in the intermediate space.

[0039] According to another expedient embodiment of the window module, the separating element comprises a fixed transparent partition that extends across the entire width of the window module without any intermediate space. In other words, the separating element is not perceived by a user even when looking through the window module. Because the separating P3514PC00 Subsequent Application

[0040] 8 element extends across the entire width of the window module, the desired circulation of the air flow in the intermediate space can take place without a lateral bypass or ‘short circuit’.

[0041] Just as the separating element extends across the entire width of the window module, it is expedient for the air-liquid heat exchanger of the window module to extend across the entire width or almost the entire width, e.g. 90% or 80%, of the window module.

[0042] In order to enable maintenance of the components included in the intermediate space as well as cleaning of the exterior glazing on its inside and the interior glazing in the direction of the intermediate space, it is expedient if, in a respective window module, the interior glazing and the separating element can be opened, in particular pivoted, towards the inside of the building. This allows access to the air-liquid heat exchanger and / or fan and / or the sun protection device for maintenance and / or cleaning purposes. In particular, the interior glazing and the separating element can be pivoted to the side and / or upwards independently of each other. For example, the interior glazing can be pivoted about a vertically oriented axis, while the separating element can be pivoted about a horizontally oriented axis, and vice versa. It is also possible to pivot both elements around parallel orientated axes, e.g. vertically or horizontally.

[0043] According to a further expedient embodiment of the window module, the separating element is arranged in the intermediate space in such a way that the intermediate space formed between the exterior glazing and the separating element is larger than the intermediate space formed between the interior glazing and the separating element. The ratio between the outer intermediate space and the inner intermediate space is selected in particular depending on the type (in particular performance class) of the air-liquid heat exchanger and / or its installation position. For example, the ratio can be 1.5: 1, 2:1, 2.5: 1 or 3: 1.

[0044] A particularly simple design of the window module is made possible by the separating element being supported on a housing wall of the fan and a housing or connecting element of the air-liquid heat exchanger. Alternatively, the separating element can be supported on other elements of the window module, e.g. the frame. P3514PC00 Subsequent Application

[0045] 9

[0046] According to a further embodiment of the window module, it is provided that at least one illuminant designed to emit colored light is arranged in the intermediate space, in particular on the separating element or adjoining it, and / or outside the intermediate space and adjoining the interior glazing, wherein the color can be used to signal a working mode of the window module (heating or cooling or neutral) or information directed at the user. The illuminant can, for example, be designed as a strip-shaped light source comprising a large number of LEDs designed to emit colored light. Such LED strips can be suitably controlled in a small installation space in order to emit information directed at the user or a working mode of the window module by means of a given color. Such information can, for example, be signals in the sense of human-machine interaction. For example, simple things can be projected onto the facade or the floor, such as flags at a sporting event. Alternatively, an optical fiber with light fed into its end or ends can be used as an illuminant.

[0047] Expediently, the fan of the window module is a speed-controllable cross-flow fan, wherein the volume of air circulating in the intermediate space or the speed of the air flow can be adjusted by setting the speed. In conjunction with the operation of the air-liquid heat exchanger, this allows the heat or cold input to the usable space to be regulated. Preferably, the air-liquid heat exchanger is a tubular heat exchanger, in particular a finned heat exchanger, in which the volume flow of the heat transfer medium can be set in a controllable manner.

[0048] When the window module is installed in the building, a lower side of the housing of the fan is expediently arranged above the lower edge of a ceiling, in particular a concrete ceiling. An upper side of the housing of the air-liquid heat exchanger is expediently arranged below an upper edge of the floor. This ensures that the technical components of the window module are out of sight of a user who is inside the building.

[0049] According to a further expedient embodiment of the window module, a controllable or adjustable valve is arranged in the fluid line of the air-liquid heat exchanger on the inlet side, wherein the position of the valve can be used to set a volumetric flow rate of the heat transfer medium through the air-liquid heat exchanger between 0 % and 100 %. In conjunction with the speed of the fan, this allows the heat or cold input to the usable space to be regulated. P3514PC00 Subsequent Application

[0050] 10

[0051] A further expedient embodiment of the window module provides that this comprises a frame with an upper frame element in the installed state, a lower frame element and two, in particular vertical, lateral frame elements connecting the upper frame element and the lower frame element, wherein a ventilation duct, which is thermally insulated from the window module and can be connected to a decentralized ventilation device, in particular a pulse ventilation device, is formed in or through the lower frame element and connects the interior of the building with the exterior of the building. This means that it is not necessary to provide ventilation systems for air exchange (air hygiene). If several window modules are arranged next to each other in a building facade, it is not necessary to provide each window module with a ventilation duct. It is sufficient, for example, to provide a single window module or every second or nth (n > 2) window module per usable space with a ventilation duct and a ventilation device.

[0052] It is furthermore expedient if the lower frame element of the window module closes off the intermediate space with a trough-shaped paneling element in order to achieve air deflection in the intermediate space, in particular without turbulence. The term ‘trough-shaped paneling element’ is to be understood in such a way that the lower frame element is V- or U-shaped in cross-section, perpendicular to a plane of the outer or interior glazing, wherein the two free ends of the ‘V’ or ‘U’ adjoin each other or the central element of the ‘U’ at an obtuse angle. In addition to the air deflection function, the trough-shaped paneling element also serves to collect any heat transfer medium escaping from the air-liquid heat exchanger. The presence of such a ‘fault’ can be determined by sensors, for example, by arranging a suitably designed sensor in the trough-shaped paneling element.

[0053] It is also expedient if the ventilation duct of the window module is arranged below the troughshaped paneling element or to the side of the trough-shaped paneling element. This means that the ventilation duct is arranged below the air-liquid heat exchanger or laterally next to the airliquid heat exchanger.

[0054] According to an expedient embodiment of the cooling and heating system, the device for adjusting the temperature level is designed to provide the heat transfer medium with a first, high temperature as the second temperature level, in particular for heating, in a supply line of P3514PC00 Subsequent Application

[0055] 11 a first pair of lines. Alternatively or additionally, the device for adjusting the temperature level can also be designed to provide the heat transfer medium in a supply line of a second pair of lines at a second, low temperature as the second temperature level, in particular for cooling, wherein the second, high temperature is greater than the first, low temperature. The device for adjusting the temperature level can thus be designed to provide either temperatures that are suitable for heating the building or temperatures that are suitable for both heating and cooling the building.

[0056] It is particularly expedient if the device for adjusting the temperature level is selected from one of the following: air-to-water heat pump with outside air; brine-to-water heat pump with geothermal probes or ground collectors; water-to-water heat pump with groundwater or cold local / di strict heating. Such heat pumps provide an ideal temperature level for the window modules. Local / di strict heating grids can also be used as devices for adjusting the temperature level. These devices constitute 4-pipe systems that supply both heat and cold, which can be used directly in the cooling and heating system according to the invention. Cold local / di strict heating grids constitute a special case. Here, a water-to-water heat pump is required on site to raise the temperature provided.

[0057] Alternatively, the device for temperature adjustment may be selected from one of the following. A local or district heating grid that provides (only) heat; a combustion-based heating that consumes renewable energies, in particular biomass or hydrogen (m), as fuel; an energy source that consumes fossil fuels, in particular gas or oil. Devices of the type mentioned are 2-pipe systems which are expediently supplemented by a device for generating cold, in particular a compression chiller. Compared to the above-mentioned heat pumps, the first temperature is higher than necessary for the operation of the cooling and heating system.

[0058] In a further expedient embodiment, it is provided that the one or more controllable switching devices comprise a first connection unit, a second connection unit and a third connection unit. The supply line and a return line of the first pair of lines are connected to the first connection unit. The supply line and a return line of the second pair of lines are connected to the second connection unit. A supply line and a return line to a number of window modules are connected to the third connection unit. By controlling valves and / or gate valves, one of the P3514PC00 Subsequent Application

[0059] 12 two temperatures with the second temperature level that arrive is selected and fed into the downstream 2-wire system, which is connected to one or more window modules.

[0060] The term supply line comprises a single line from which branches lead to the respective window modules, as well as a pipe system in which lines can be connected in any number of branches. In the same way, the term return line comprises a single line from which branches lead to the respective window modules, as well as a pipe system in which lines can be connected in any number of branches.

[0061] According to a further expedient embodiment, the cooling and heating system comprises a controllable switching device whereby all window modules in the building are operated in the same operating mode. The switchover takes place, for example, in a technical room, which is preferably adapted in close proximity to the device for adjusting the temperature level. In this variant, the entire building can only be heated or cooled. A local energy transfer in particular is only possible via the technical center or the device for temperature adjustment. Due to the low complexity of such an arrangement, it can be used advantageously in smaller buildings, especially those in which the facades are oriented similarly to each other. These are, in particular, buildings which have only one facade or, for example, several facades which are oriented at an obtuse angle to each other.

[0062] According to a further expedient embodiment, the cooling and heating system comprises at least one switching assembly per level (i.e. floor), each of which can be controlled individually. According to this embodiment, for example, the number of switching assemblies can be provided in a riser shaft of the building. Switching between heating and cooling is then possible for each group of window modules, which are connected to different switching assembly.

[0063] Alternatively or additionally, the cooling and heating system can comprise at least one switching assembly per facade area, each of which can be controlled individually. For example, each window module of a facade area can be associated with a switching assembly. Switching can then take place for each individual window module by means of the associated switching assembly, whereby each individual window module can be heated or cooled as P3514PC00 Subsequent Application

[0064] 13 required. This is advantageous, for example, in buildings that have a large number of separate usable spaces, such as one usable space per window module.

[0065] In general, the greater the number of switching assemblies per level and / or per facade areas, the finer the heating or cooling of the building or parts of the building or usable spaces can be.

[0066] The alternatives mentioned above can be combined in any way.

[0067] A particularly high energy efficiency of the cooling and heating system can be achieved by comprising a distribution arrangement that is designed to transfer energy between two groups of window modules that are connected to different switching assemblies. The energy transfer makes it possible to use energy as locally as possible, as lower line losses occur and less drive current is required for pumps, etc.

[0068] A further expedient embodiment provides that the distributor arrangement comprises valves and a pump which is designed to connect a return line of a first group of window modules to a supply line of a second group of window modules via a first valve and a supply line of the first group of window modules to a return line of the second group of window modules via a second valve in order to transfer energy. This enables efficient, direct energy transfer between window modules or groups of window modules.

[0069] A group of window modules is a hydraulic connection between several window modules or groups of window modules.

[0070] Alternatively, energy can be transferred indirectly between window modules or groups of window modules. This means that there is no direct hydraulic connection between individual window modules or groups of window modules. Instead, energy is transferred via the return of the heat transfer medium in the technical center. From there, the energy is transferred to another group of window modules. With this variant, energy can be used in the technical center, e.g. to connected storage tanks. Alternatively or additionally, energy can be fed into a local / di strict heating grid. P3514PC00 Subsequent Application

[0071] 14

[0072] A further expedient embodiment provides that the respective fluid lines of the air-liquid heat exchanger of a respective window module are connected on the input side to an adjustable valve, wherein a volume flow of the heat transfer medium through the air-liquid heat exchanger of each window module can be set individually by the position of the valve.

[0073] According to a further embodiment of the window module, the latter comprises a local control unit which is designed to regulate and / or control at least one actuator of the window module, comprising a valve actuator and / or a drive of the fan and / or a drive of the sun protection device, in such a way that an actual room temperature value received corresponds to a given target room temperature value. In other words, it is intended to use the local control unit to regulate the speed of the fan and / or the volume flow of the air-liquid heat exchanger and / or the sun protection device in such a way that the target room temperature is achieved.

[0074] In a further embodiment, the window module comprises at least one sensor, comprising respective temperature sensors for detecting the temperatures of the heat transfer medium at the inlet and / or outlet of the fluid line of the air-liquid heat exchanger and / or the temperatures of the air at the inlet and / or outlet of the air-liquid heat exchanger, wherein the temperature values are provided to at least the local control unit for processing for the regulation and / or control of the at least one actuator.

[0075] In addition, it may be provided that the local control unit comprises an interface at which it receives at least the actual room temperature value and the given target room temperature value from a central control unit of the building or a part of the building. A part of a building (building section) is understood to mean, for example, a floor or building wing / segment or usable space or a group of usable spaces. The local control unit can also transmit data to the central control unit via the interface, such as the above-mentioned temperature values, which enable the central control unit, for example, to perform a power calculation to precisely calculate the currently optimal building supply. Detailed fault messages can also be transmitted from the local control unit to the central control unit. This enables faults to be rectified quickly in the event of a malfunction. This enables efficient operation of the window module for conditioning the usable space in a short space of time. The result is a saving on maintenance and operating costs. P3514PC00 Subsequent Application

[0076] 15

[0077] As further information, the local control unit can receive a control signal for the drive of the sun protection device from the central control unit at the interface.

[0078] Data can be exchanged between the local control unit and the central control unit, for example, via a data bus, e.g. according to the well-known Modbus protocol.

[0079] According to a further expedient embodiment, the central control unit is designed to control the switching position of a respective switching device based on the actual room temperature value and the given target room temperature value. Optionally, the central control unit can also be designed to control the switching position of a respective switching device based on at least one further parameter, in particular a season and / or an outside temperature.

[0080] According to a second aspect of the invention, a method for thermal regulation of a building by means of a cooling and heating system according to one or more embodiments of the invention is proposed. In the method, depending on a first or second switching position, the supply line following the relevant switching device in the direction of flow is fed by the device for adjusting the temperature level with the heat transfer medium of the circuit whose first temperature level is selected or controlled depending on a desired operating mode. This has the same advantages as those explained above in connection with the window module according to the invention.

[0081] The invention is explained in more detail below with reference to examples of embodiments in the drawings. These figures show:

[0082] Fig. 1 a schematic representation of a building according to the invention with several floors according to a first embodiment in a lateral view, wherein exactly one switching device is provided in the vicinity of a device for adjusting the temperature level; P3514PC00 Subsequent Application

[0083] 16

[0084] Fig. 2 a schematic representation of a selected floor of the building of Fig. 1 in a plan view, from which the pipe system for supplying a plurality of window modules according to the invention with a heat transfer medium can be seen;

[0085] Fig. 3 a schematic representation of a building according to the invention according to a second embodiment in a lateral view, wherein one switching device is provided per window module;

[0086] Fig. 4 a schematic representation of a selected floor of the building of Fig. 3 in a plan view, from which the pipe system for supplying the window modules with the heat transfer medium can be seen;

[0087] Fig. 5 a schematic representation of a building according to the invention according to a third embodiment in a lateral view, wherein a respective switching device is provided for each floor and facade areas;

[0088] Fig. 6 a schematic representation of a selected floor of the building of Fig. 5 in a plan view, from which the pipe system for supplying the window modules with the heat transfer medium can be seen;

[0089] Fig. 7 a schematic representation of a building according to the invention according to a fourth embodiment in a lateral view, wherein a different number of switching devices per floor and facade areas is provided in a riser shaft;

[0090] Fig. 8 a schematic representation of a selected floor of the building of Fig. 7 in a plan view, from which the pipe system for supplying the window modules with the heat transfer medium can be seen;

[0091] Fig. 9 a schematic representation of two groups of window modules on differently oriented facade areas, wherein a direct energy transfer between the groups of window modules is shown; P3514PC00 Subsequent Application

[0092] 17

[0093] Fig. 10 a schematic representation of two groups of window modules on differently oriented facade areas, wherein an indirect energy transfer between the groups of window modules is realized via the device for the temperature level adjusting; and

[0094] Fig. 11 a schematic representation of a window module in cross-section, as used in a cooling and heating system according to the invention.

[0095] The same reference numbers are used for the same elements in all figures. The drawings are merely schematic in nature and serve to illustrate the invention, so that the dimensions and proportions do not necessarily correspond to reality.

[0096] Before the cooling and heating system according to the invention is described in detail, Fig. 11 provides a description of the window module used in the cooling and heating system, which enables heating or cooling for thermal regulation of the building interior.

[0097] Thermal regulation of a building is understood to mean the possibility of conditioning a usable space 30 located on an interior side IS of the window module 1 by means of heating or cooling. The window module 1 also provides sun protection by means of adjustable shading and can also be designed to enable ventilation of the usable space 30.

[0098] The window module 1 comprises a frame 12, which in this example consists of four frame elements, of which an upper frame element 120 and a lower frame element 12U are visible in the cross-sectional views shown. The letters ‘O’ and ‘U’ denote the ‘top’ or ‘bottom’ position of a respective frame in its installed state in a building not shown in detail. The frame elements 120, 12U and the left and right frame elements not shown in the Fig. 11 hold an exterior glazing 2 and an interior glazing 3 of the window module 1 spaced apart from the latter. An intermediate space 4 sealed against solids, in particular dust, is formed between the exterior glazing 2 and the interior glazing 3. The intermediate space 4 is open to diffusion towards the usable space in order to prevent condensation. The intermediate space 4 is filled with air. P3514PC00 Subsequent Application

[0099] 18

[0100] While the exterior glazing 2 is highly insulating glazing, the interior glazing 3 can be designed as single glazing or laminated safety glass. This means that the heat transfer coefficient Ua of the exterior glazing 2 is lower than the heat transfer coefficient Ui of the interior glazing 3. The factor by which the heat transfer coefficient Ua of the exterior glazing 2 is lower than the heat transfer coefficient Ui of the interior glazing 3 depends fundamentally on the desired thermal regulation of the building. It is expedient that the heat transfer coefficient Ua of the exterior glazing 2 is at least three times lower than the heat transfer coefficient Ui of the interior glazing 3, and preferably five times lower or more. If the window module is designed solely for cooling the building, a factor of 3 is sufficient, i.e. Ui / Ua = 3. If the window module is also to be used to heat the usable space, a factor of 5 or greater is expedient, i.e. Ui / Ua > 5.

[0101] The highly insulating exterior glazing 2 significantly reduces heat exchange between the exterior AS (also referred to as the environment) of the building and the interior of the window module 1, but also of the usable space 30 on the interior IS, i.e. the interior of the building. Due to the thermal regulation of the temperature by the window module 1, a less insulating interior glazing 3 is advantageous, since heat is or should be transferred to the interior or from the usable space to the window module due to the temperature controlled by the window module 1.

[0102] The window module 1 comprises an air-liquid heat exchanger 5, which comprises a fluid-flow cooling / heating element with a fluid line in which a heat transfer medium is guided. Water or a water-glycol mixture can be used as the heat transfer medium, for example. The air-liquid heat exchanger 5 is in particular a tubular heat exchanger, in particular a finned heat exchanger. Such tubular heat exchangers are well known to those skilled in the art, so that a detailed description of the design is omitted here.

[0103] In the embodiment shown in Fig. 11, the air-liquid heat exchanger is arranged at the bottom, arranged horizontally, in the intermediate space when the window module 1 is installed, so that air from the intermediate space can flow through it. As can be readily seen from Fig. 11, the air-liquid heat exchanger 5 is arranged adjoining the interior glazing 3 and adjoining the lower frame element 12U. P3514PC00 Subsequent Application

[0104] 19

[0105] In an embodiment not shown in the figures, the air-liquid heat exchanger 5 could also be arranged horizontally at the top in the intermediate space when the window module 1 is installed, so that air from the intermediate space can flow through it. In this alternative embodiment, which is not shown in the figures, the air-liquid heat exchanger 5 would be arranged on the interior glazing 3 and adjacent to the upper frame element 120.

[0106] Although, based on the basic physical principle, the air-liquid heat exchanger 5 can be arranged both at the bottom and at the top, horizontally, in the intermediate space 4, from a design point of view it is preferable to arrange the air-liquid heat exchanger 5 in the intermediate space 4 at the bottom, as shown in Fig. 11.

[0107] The air-liquid heat exchanger 5 is arranged in the window module 1 in such a way that air can flow through it from the intermediate space 4. The air guided in the intermediate space 4 transfers heat to the heat transfer medium via the air-liquid heat exchanger 5 or absorbs heat from it, so that the air guided in the intermediate space 4 in a circuit is cooled or heated. The heat transfer medium in the air-liquid heat exchanger 5 is cooled or heated in a device 48 which is designed to transport the heat transfer medium in at least one circuit from a respective first temperature level to a respective second temperature level.

[0108] The device mentioned, which is not described in further detail, can be a combined heat and power machine, e.g. a heat exchanger, a heat pump, a transfer station of a district heating grid or a combustion-based heating system. The first temperature level can be higher than the second temperature level. In this case, the usable space 30 is heated. If the first temperature level is lower than the second temperature level, the usable space 30 can be cooled.

[0109] For force-guiding the air located in the intermediate space 4, a fan 10 is arranged in the intermediate space 4. The fan 10 guides air through the air-liquid heat exchanger 5 in the direction of the arrows H (direction of air flow in heating mode) and K (direction of air flow in cooling mode) in order to exchange heat between the air and the heat transfer medium guided in the air-liquid heat exchanger 5. In addition, the fan 10 serves to guide the air in the intermediate space 4 in a circuit, the direction of which is indicated by the arrows H, K. P3514PC00 Subsequent Application

[0110] 20

[0111] The fan 10 is arranged at the top or bottom, arranged horizontally, in the intermediate space 4 when the window module is installed. The fan 10 is arranged horizontally at the top in the intermediate space 4 when the air-liquid heat exchanger 5 is arranged horizontally at the bottom in the intermediate space 4, as shown in Fig. 11. In a corresponding manner, the fan 10 is arranged horizontally at the bottom in the intermediate space 4 when the air-liquid heat exchanger 5 is arranged horizontally at the top in the intermediate space 4. As described above, this embodiment is not shown in the figures.

[0112] The fan 10 is operated both in cooling mode and in heating mode, which are the operating modes of the window module 1. A cross-flow fan is preferably used as fan 10. This has a high efficiency, as the direction of rotation of the fan 10 does not need to be changed, regardless of the operating mode of the window module 1.

[0113] In order to guide the air in the intermediate space 4 in a circuit, the intermediate space 4 is subdivided into an inner intermediate space 41 and an outer intermediate space 4A in order to enable - through force-guiding by the operation of the fan 10 - a rising air flow in the inner intermediate space 41 and a falling air flow in the outer intermediate space 4A. The subdivision of the intermediate space 4 into the outer intermediate space 4A and the inner intermediate space 41 is ensured by means of a separating element 19 arranged in the intermediate space 4.

[0114] The separating element 19, e.g. a fixed transparent partition 15, runs essentially parallel to the exterior glazing 2 and the interior glazing 3, with the separating element 19 extending across the entire width of the window module without any intermediate space. This prevents a ‘short circuit’ or ‘bypass’ between the outer intermediate space 4A and the inner intermediate space 41 at the side of the separating element 19.

[0115] The separating element 19 is preferably arranged in the intermediate space 4 in such a way that the intermediate space 4A formed between the exterior glazing 2 and the separating element 19 is larger than the intermediate space 41 formed between the interior glazing 3 and the separating element 19. The ratio between the outer intermediate space 4A and the inner P3514PC00 Subsequent Application

[0116] 21 intermediate space 41 is selected in particular depending on the type of air-liquid heat exchanger (in particular its performance data) and its installation position. For example, the ratio can be 1.5: 1, 2: 1, 2.5: 1 or 3: 1.

[0117] The total length of the intermediate space 4 formed between the exterior glazing 2 and the interior glazing 3 is preferably greater than 150 mm. The distance formed between the interior glazing 3 and the exterior glazing 2 is also selected depending on the type and performance class of the air-liquid heat exchanger and its installation position. The distance can also be selected differently and, in particular, can be significantly greater than 150 mm.

[0118] If the fan 10 is arranged at the top of the intermediate space 4 and the air-liquid heat exchanger 5 is arranged at the bottom of the intermediate space 4, as shown in Fig. 11, the air is transported in the inner intermediate space 41 from bottom to top, i.e. from the air-liquid heat exchanger 5 towards the fan 10, due to the direction of rotation of the fan 10, while the air is transported in the outer intermediate space 4A from top to bottom, i.e. from the fan 10 towards the air-liquid heat exchanger 5. If the fan 10 and the air-liquid heat exchanger 5 are arranged in the intermediate space 4 in the alternative configuration mentioned, this results in an air flow in the opposite direction. In any case, the window module is operated in such a way that the air in the intermediate space is guided in the same direction in the circuit, regardless of the operating mode (heating or cooling).

[0119] As can be seen from the cross-sectional view in Fig. 11, the design of the window module 1 is particularly simple if the separating element 19 is supported on a housing wall 10G of the fan 10 and a housing or connecting element of the air-liquid heat exchanger 5.

[0120] In order to enable maintenance of the components included in the intermediate space 4 (fan 10 and / or air heat exchanger 5) as well as cleaning of the exterior glazing 2 on its side facing the interior of the building 4 and of the interior glazing 3 in the direction of the intermediate space 4 as well as of the separating element 19, it is expedient if the interior glazing 3 and the separating element 19 can be opened towards the interior IS of the building or usable space 30. For this purpose, for example, the interior glazing 3 and the separating element 19 can be attached to joints not shown in the figure, which are located, for example, on a lateral frame P3514PC00 Subsequent Application

[0121] 22 element of the frame 12, in order to enable pivoting as with a conventional window sash. The interior glazing 3 and separating element 19 can be pivoted to the side, for example, or alternatively upwards. The direction of pivoting of the interior glazing 3 and separating element 19 can also be independent of each other.

[0122] The window module 1 further comprises a controllably adjustable sun protection device 11 as a sun protection function. The sun protection device 11 is arranged in the outer intermediate space 4 A. In particular, it directly adjoins the exterior glazing 2, so that when the sun protection function is activated (i.e. partially or completely covering the exterior glazing and resulting shading of the usable space 30), the outer intermediate space 4A is completely or substantially formed between the sun protection device 11 and the separating element 19.

[0123] For example, as indicated in Fig. 1, the sun protection device 11 can be formed by a Venetian blind that is attached to the upper frame element 120. In Fig. 11, the blind is shown in its open position, in which the individual slats adjoin one another. If the distance between the adjoining slats is increased, the blind can be moved from above in the direction of the lower frame element 12U. Furthermore, by adjusting the angle of the slats, it is possible to determine how much light is to be transmitted towards the inside IS. Similarly, the extent to which the sun protection device 11 overlaps the exterior glazing 2 or the interior glazing 3 can be used to determine how much radiation is absorbed and reflected by the sun protection device 11.

[0124] The sun protection device 11 is preferably made of a material that absorbs and reflects solar radiation and is adjustable in such a way that the daylight intensity in the usable space 30 can be set. As an alternative to the blind shown, the sun protection device 11 can be embodied as a roller blind, double roller blind, textile curtain and the like. The mechanical components are preferably, as shown in Fig. 11, attached to the upper frame element 120 in such a way that, when deactivated, they can be completely accommodated in an intermediate space formed between the housing 10G of the fan and the exterior glazing 2, whereby the sun protection device 11 is outside a user's field of vision when deactivated. P3514PC00 Subsequent Application

[0125] 23

[0126] The sun protection device 11 can also be integrated into the exterior glazing as switchable glass. For example, electrochromic glass such as that sold by the company SageGlass® (https: / / www.sageglass.com / de / intelligentes-glas / funktionsprinzip-elektrochromem-glas) can be used for this purpose. In this case, the mechanical sun protection element (blind, roller blind, etc.) shown in Fig. 11 can be provided as an option.

[0127] The fact that the sun protection device 11 is adjoined to the exterior glazing 2 results in similar flow conditions in the circulation of the air in the intermediate space, regardless of whether the sun protection device 11 is activated or not. In particular, this results in a less turbulent flow of air compared to another arrangement of the sun protection function in the intermediate space, whereby the window module 1 can be operated with higher efficiency and less noise. In addition, by adjoining the sun protection device 11 to the exterior glazing 2, less heat can be introduced into the intermediate space 4 of the window module. This also results in lower vibrations and less mechanical stress on the components arranged in the intermediate space.

[0128] As can be seen from Fig. 11, two (optional) illuminants 6, 7 are arranged in the intermediate space 4, which are designed to emit colored light. The illuminants 6, 7 are, for example, light guides or light strips, each comprising a plurality of, in particular individually controllable, LEDs, e.g. RGB LEDs. The illuminant 6 here is a lower illuminant, which is arranged in the outer intermediate space 4 A adjoining the air-liquid heat exchanger 5. The illuminant 7 shows an upper illuminant, which is arranged in the outer intermediate space 4A adjoining the fan 10.

[0129] The illuminants 6, 7 serve in particular to signal the working mode of the window module by means of their color. Alternatively or additionally - with a suitable design of the illuminant 6, 7 - information directed at the user can also be signaled. Such information can be signals in the sense of human-machine interaction. For example, simple things can be projected onto a floor 32 or a ceiling 31 (Fig. 2) of the usable space 30, such as flags of a sporting event (football World Cup or European Championship). P3514PC00 Subsequent Application

[0130] 24

[0131] Contrary to what is shown in the drawing, only one of the two illuminants 6, 7 may be provided in the window module. Alternatively, the illuminant(s) 6, 7 may also be arranged in the inner intermediate space 41. Alternatively or additionally, the illuminant or illuminants may also be arranged outside the intermediate space 4, in particular adjoining the interior glazing 3, for example on or in the lower or upper frame element 12U, 120.

[0132] As described above, the air-liquid heat exchanger 5 comprises a fluid-flow cooling / heating element with a fluid line in which the heat transfer medium is guided. A controllable or adjustable valve 42 is arranged on the inlet side of the fluid line of the air-liquid heat exchanger 5, wherein a volume flow of the heat transfer medium through the air-liquid heat exchanger 5 can be set between 0 % and 100 % by the position of the valve 42 by means of a valve drive 43. In Fig. 11, the valve is only shown schematically and, for the sake of simplicity, outside the frame 12 of the window module. In practice, the valve 42 and its valve drive 43 can, for example, be arranged in the lower frame element 12U.

[0133] The valve drive 43 is, for example, a servomotor that is supplied with electrical energy. For this purpose, a power supply line 44 is schematically indicated, which, for example, is also associated with the lower frame element 12U or guides into it.

[0134] As schematically shown in the Fig. 11, the valve 42 is arranged in a supply line 40 to the fluid line of the air-liquid heat exchanger 5. A return line of the window module 1, which is coupled on the output side to the fluid line of the air-liquid heat exchanger 5, is schematically labelled with the reference numeral 41.

[0135] The lower frame element 12U has a trough-shaped paneling element 13 on its wall side facing the intermediate space 4. On the one hand, this achieves air deflection with low turbulence in the intermediate space 4. On the other hand, should the air-liquid heat exchanger 5 lose liquid due to a technical defect, the heat transfer medium escaping from the air-liquid heat exchanger 5 can collect in the trough-shaped paneling element 13. In order to detect such a leakage of the air-liquid heat exchanger 5, it is expedient if a corresponding leakage sensor is arranged on the floor of the trough-shaped paneling element 13 of the lower frame element 12U. P3514PC00 Subsequent Application

[0136] 25

[0137] Preferably, an optional ventilation duct 9 is formed in the intermediate space formed between the floor of the trough-shaped paneling element 13 and the lower wall surface of the lower frame element 12U, which connects the exterior AS of the building with the interior IS of the building or usable space 30. In particular, the ventilation duct 9 is connected to a pulse ventilation device not shown in detail in the figures in order to enable air exchange without the need for a separate ventilation system in the building.

[0138] If several window modules are arranged next to each other in a building facade, which are associated with the same usable space 30, it is not necessary for each window module 1 to be provided with such a ventilation duct 9. It is sufficient, for example, to provide e.g. one window module per usable space 30 or every nth window module per usable space 30 with a ventilation duct 9 and associated (pulse) ventilation device.

[0139] While in the graphic representation of Fig. 11 the ventilation duct 9 is arranged below the trough-shaped paneling element 9, the ventilation duct 9 could also be arranged laterally next to the trough-shaped paneling element 13, provided that the trough-shaped cross-section does not extend over the entire width of the lower frame element 12U. In other words, this means that the ventilation duct 9 can thus be arranged below the air-liquid heat exchanger 5 or laterally next to it.

[0140] As has become clear from the preceding description, the window module 1 comprises a plurality of actuators (valve drive 43, speed-controllable fan 10, drive of the sun protection device 11, illuminants 6, 7) and sensors (leakage sensor 8, various temperature sensors, etc.), for the control of which a local control unit 20 is provided. The term ‘control unit’ is to be understood as a control and regulation unit, i.e. a computing unit which is designed to control or regulate a respective technical component depending on its application.

[0141] The control or regulation of the actuators 6, 7, 10, 11, 43 takes place individually as a function of an actual room temperature value Tist received, so that this corresponds to a given target room temperature value Tsoii. By way of example only, the local control unit 20 is arranged in the upper frame element 120. It is understood that this is connected to the power supply line P3514PC00 Subsequent Application

[0142] 26

[0143] 44 or a separate power supply line guided into the upper frame element 120 for its power supply.

[0144] In addition to the leakage sensor 8 explicitly shown in Fig. 11, the window module 1 comprises the sensors already mentioned above, the measured values of which are provided at least to the local control unit 20 of the window module 1 for processing for the regulation and / or control of one or more actuators 6, 7, 10, 11, 43. In particular, the sensors provided are respective temperature sensors, not explicitly shown in the figures, for detecting the temperatures of the heat transfer medium at the inlet and / or outlet of the fluid line of the airliquid heat exchanger 5 and / or the temperatures of the air at the inlet and / or outlet of the airliquid heat exchanger 5.

[0145] The local control unit 20 is designed to exchange data with a central control unit 25, i.e. to receive data from the central control unit 25 and / or to transmit data to the central control unit 25. The central control unit 25 is in particular a central control unit of the entire building or a part of the building, e.g. a floor, wing, building segment, usable space or group of usable spaces. The central control unit 25 can be the control unit of a building management system or be part of a control system of a building management system.

[0146] For data communication, the local control unit 20 comprises an interface, not explicitly shown, at which it receives at least the aforementioned actual room temperature value Tist and the given target room temperature value Tsoii from the central control unit 25. The local control unit 20 can also receive a control signal (up, down) for the drive of the sun protection device 11 from the central control unit 25 at the interface. Such a control signal can be generated automatically, for example, if the window module 1 is exposed to strong solar radiation in a building facade facing south, for example. The control signal can also be generated user-based at a usable space control unit not shown.

[0147] The central control unit 25 can be connected to further sensors, e.g. a room sensor 33, for generating the control signals (Tist, Tsoii, Up, Down). The sensor 33 may comprise one or more identical or different sensors, which are designed to measure different sensor values and transmit them to the central control unit 25. Such a sensor is also referred to as a multi-sensor. P3514PC00 Subsequent Application

[0148] 27

[0149] For example, the sensor 33, which is arranged, for example, on the ceiling 31 of the usable space 30, can detect the actual room temperature (actual room temperature value Tist), an actual air humidity (rHist), a current illuminance (Lux) a current carbon dioxide value (CO2), a current volume (dBA), the presence of one or more persons in the usable space 30 and other values. The central control unit 25 then generates the corresponding control information from this information and transmits it to the local control unit 20.

[0150] The central control unit 25 can, for example, be coupled to a plurality of (multi -sensor) sensors of a plurality of usable spaces in order to receive respective data from these for processing.

[0151] In Figs. 1 to 8, four different embodiments of the invention are described below with reference to a building 100 according to the invention with several floors, wherein Figs. 1, 3, 5 and 7 show the building 100 in a side view, and Figs. 2, 4, 6 and 8 show a selected floor of the described embodiment in a plan view.

[0152] The configuration of the building 100 according to the invention, which is the same for all four embodiment examples, is described by way of example with reference to Figs. 1 and 2, which show the first embodiment.

[0153] As can be seen from the side view of Fig. 1, the building 100 comprises only three levels 101, 102, 103 by way of example. The levels 101, 102, 103 are hereinafter also referred to as floors. Level 101, for example, shows a ground floor. Levels 102 and 103 show a first floor and a second floor. The number of levels or floors 101 to 103 can in principle be chosen as desired, i.e. the cooling and heating system according to the invention could also be used in buildings which have only one level or more than one level.

[0154] The building 100 shown in Figure 1 has two facade areas 111 and 112 oriented in opposite cardinal directions. For example, the facade area I l l is oriented towards the north and the facade area 112 towards the south. The sides of the building connecting the facade areas 111 and 112 are not visible in the figure. In the case of a building with a rectangular floor plan, P3514PC00 Subsequent Application

[0155] 28 these can be oriented towards the west and east. In principle, however, the base of the building can have any shape, so that the facade areas can be oriented in any direction.

[0156] The reference numbers 105, 107 and 109 designate the respective storey floors of levels 101 to 103. In a corresponding manner, the reference numbers 106, 108 and 110 designate respective storey ceiling of levels 101 to 103. The storey floor 105 of the lowest level 101 is, by way of example, approximately at the level of a floor surface 104 of the building 100. A technical center 114 is arranged below the building 100, for example in a basement not explicitly shown.

[0157] A device 50 for adjusting the temperature level is arranged in the technical center 114. The device 50 for adjusting the temperature level is designed to transport the heat transfer medium in at least one circuit from a respective first temperature level (input temperature level) to a respective second temperature level (output temperature level). The first temperature level can be higher than the second temperature level, or vice versa. The second temperature level constitutes a flow temperature for the window modules 1 as a consumption arrangement.

[0158] As can best be seen from the plan view according to Fig. 2, which shows a view of the first level 101, a number of n window modules 1-1,..., 1-n (generally: 1-i, wherein i = l...n with n > 1) is arranged in the facade areas 111. In a corresponding manner, a number of m window modules 1-1,..., 1-m (generally: 1-j, wherein j = l...m with m > 1) are arranged in the facade area 112. The number n can correspond to the number m (n = m) or be different (n m).

[0159] The window modules 1-i and 1-j in the facade areas 111, 112 are constructed identically as described above and each extend between the storey floor and the storey ceiling of the respective level or floor. The window modules 1-i and 1-j constitute the consumption arrangement for the cooling and heating system of the building 100.

[0160] As can be better seen from the plan view according to Figure 2, the technical center 114 is preferably arranged in spatial proximity to or below a riser shaft 113 (preferably arranged centrally in the level). Lines of a pipe system 60, in which the heat transfer medium circulates in the at least one circuit between the device for adjusting the temperature level 50 and the P3514PC00 Subsequent Application

[0161] 29 plurality of window modules 1-i and 1-j, run in the riser shaft 113. It is clear to the skilled person that the building 100 may also have more than one riser shaft passing over all or some of the levels.

[0162] The pipe system 60 comprises a supply line arrangement 61 and a return line arrangement 62. The pipe system 60 and its supply line arrangement 61 and return line arrangement 62 are designed in sections as a 2-pipe system and / or 4-pipe system. The exact design depends on the one hand on which type of device 50 for adjusting the temperature level is used in the building 100. On the other hand, this depends on the number and arrangement of controllable switching devices 91 to 98 in the pipe system 60. Details are described in more detail below in connection with the description of the four different embodiments.

[0163] The device 50 for adjusting the temperature level is designed to provide the heat transfer medium with a first, high temperature as the second temperature level in a supply line of a first line pair 71, which extends from the device 50. In particular, this enables heating operation of the building 100. Furthermore, the device 50 for adjusting the temperature level is or can be designed to provide the heat transfer medium at a second, low temperature, as the second temperature level, in a supply line of a second line pair 72, which also extends from the device 50 for adjusting the temperature level, wherein the first, high temperature is greater than the second, low temperature. In particular, this enables cooling of the building 100.

[0164] The first, high temperature and the second, low temperature are to be understood in particular as different flow temperatures for the window modules 1-i and 1-j in the building 100. Thus, the first, high temperature as well as the second, low temperature can also be used for cooling, wherein cooling capacities are different, however.

[0165] When “the building” is referred to in the present description, this comprises not only the building 100 as a whole, but also individual parts of the building or individual or several usable spaces. With the help of the flow temperatures, different usable spaces that are associated with the north-facing facade area 111, for example, can be conditioned with the first, high temperature, while usable spaces that are associated with the south-facing facade P3514PC00 Subsequent Application

[0166] 30 area 112 are conditioned with the second, low temperature. This procedure enables decentralized dew point shifts in particular.

[0167] The device 50 for adjusting the temperature level can, for example, be an air-to-water heat pump that is operated with outside air. Alternatively, a brine-to-water heat pump with geothermal probes or ground collectors can be used as the device 50 for adjusting the temperature level. A water-to-water heat pump operated with groundwater or cold local / di strict heating is also conceivable. Such heat pumps provide a temperature level with which the cooling and heating system can be operated particularly efficiently. Alternatively, the device 50 for adjusting the temperature level can also be formed by a connection node of a local or district heating grid that provides heat and / or cold. Devices of this type constitute so- called 4-pipe systems. These are connected directly to one or more of the switching devices 91 to 98.

[0168] The switching devices 91 to 98 have the object of selecting one of the two temperatures arriving (in the 4-pipe system) at the respective second temperature level and feeding it into the downstream 2-pipe system to which the window modules 1-i and 1-j are connected. The switching devices 91 to 98 can, for example, be designed as a 6-way switching valve (6-way changeover valve). For example, the valves known from the Danfoss® company, available at https: / / www.danfoss.com / de-de / products / dhs / 3-differential-pressure-and-flow- controllers / hydronic-balancing-and-control / novocon-and-changeover6 / changeover6 / , can be used for this purpose. Alternatively, the respective switching devices 91 to 98 can comprise butterfly valves in order to shut off the supply line that is not to be used. As these do not react dynamically to pressure changes, a static presetting is required, as described at https: / / www.imi-hydronic.com / de-de / product / eclipse, for example.

[0169] Each of the switching devices 91 to 98 thus comprises a first connection unit, a second connection unit and a third connection unit (these are not explicitly shown in the figures). The supply line and a return line of the first line pair 71 are connected to the first connection unit (see, for example, Fig. 1). The supply line and a return line of the second line pair 72 are connected to the second connection unit. A supply line and a return line to the window P3514PC00 Subsequent Application

[0170] 31 modules or a determined partial number of window modules 1-i and 1-j are connected to the third connection unit.

[0171] The term supply line comprises a single line from which branches lead away to the respective window modules, as well as a pipe system in which lines can be connected in any number of branches. The term return line comprises, in the same way, a single line from which branches lead in from the respective window modules, as well as a pipe system in which lines can be connected in any number of branches.

[0172] A connection node of a local or district heating grid that only provides heat can also be used as a device 50 for adjusting the temperature level. Combustion-based heating that consume renewable energies, in particular biomass or hydrogen, as fuel, are also conceivable. Alternatively, combustion-based heating that consume fossil fuels such as gas or oil can also be used as devices 50 for temperature adjustment. The devices of this type mentioned are based on so-called 2-pipe systems, which must be supplemented by a device for cold generation. Compared to heat pumps, the first temperature is also higher than necessary for the operation of the cooling and heating system. As a device for generating cold, the device 50 for adjusting the temperature level can comprise in particular a compression chiller or such a machine can be placed alongside the device 50 for adjusting the temperature level.

[0173] The first embodiment shown in Figs. 1 and 2 comprises a (precisely one) controllable switching device 91, with which all window modules 1-i and 1-j in the building 100 are operated in the same operating mode. The switching device 91 is preferably arranged in the technical room. In this embodiment, the entire building can only heat or cool. An energy transfer is only possible via the device for adjusting the temperature level 50. The embodiment has a low complexity of the pipe system and is therefore preferably used in smaller buildings. Such an embodiment is particularly expedient for buildings in which the facades are essentially similarly oriented.

[0174] The pipe system 60 in the first embodiment comprises a riser pair 63, which is part of the supply line arrangement 61 and the return line arrangement 62. In each level 101 to 103, respective string line pairs 64 and 65 (level 101), 66 and 67 (level 102) and 68 and 69 (level P3514PC00 Subsequent Application

[0175] 32

[0176] 103) branch off in a horizontal direction from the riser pair 63. In this case, the string line pairs 64, 66, 68 connect the window modules of the first facade area 111 and the string line pairs 65, 67, 69 connect the window modules of the second facade area 112 on the respective level 101 or 102 or 103 with the riser pair 63.

[0177] The cooling and heating system according to the first embodiment is comparatively static and allows few control and regulation options. For this reason, it is preferably only suitable for use in small buildings. For example, individual rooms can be conditioned. If it gets too warm in a room, the heating in this room can be switched off. However, the room cannot be cooled as long as the entire building is in heating mode.

[0178] The second embodiment shown in Figs. 3 and 4 comprises switching devices 92 to 95, wherein these are associated per level with respective window modules 1-i and 1-j on the facade areas 111 and 112. In principle, exactly one switching device can be associated with each window module 1-i and 1-j. In an alternative embodiment, a common switching device could also be associated with a group, i.e. a partial number, of window modules of a respective level 101 and facade areas 111 and 112. This variant is not explicitly shown in the drawings. In the second embodiment, there is a switching option at each individual window module or group of window modules. This means that each individual window module or group of window modules can be heated or cooled separately, wherein energy can be transferred between the window modules or groups of window modules.

[0179] As can be seen in particular from Figure 4, the switching devices are thus provided in the respective levels 101 to 103 and the associated facade areas 111, 112. In this embodiment, the switching devices are preferably arranged in close proximity to the respective window modules 1-i and 1-j. They can also be arranged in the riser shaft 113.

[0180] In this embodiment, the pipe system 60 comprises a riser pair 73 which extends in a vertical direction through the riser shaft 113 over the respective levels 101 to 103. Depending on the device for adjusting the temperature level 50, the riser pair 73 is preferably embodied as a 4- pipe system. On the respective levels or floors 101 to 103, respective string line pairs 74 to 79 P3514PC00 Subsequent Application

[0181] 33 branch off from the riser pair 73 in the direction of the associated facade areas 111 and 112 or window modules or groups of window modules.

[0182] Due to the large number of switching devices required, the second embodiment is complex and expensive. The advantage is that very fine-grained thermal regulation of the building or individual usable spaces can be realized.

[0183] The third embodiment shown in Figs. 5 and 6 comprises switching devices 92, 94 on each level 101 to 103, wherein in the present embodiment example a switching device 92 is associated with the window modules 1-i of the facade area 111 and a switching device 94 is associated with the window modules 1-j of the facade area 112. Instead of providing only one switching device per floor and all window modules of the floor of a facade area, several switching devices could also be provided per facade area and floor in order to assign groups of window modules to a respective switching device.

[0184] The switching devices 92, 94 can be arranged in the riser shaft 113 in this so-called “horizontal modular group design”. By appropriate control, the switching devices 92, 94 can be used for selective heating or cooling for each group. In particular, the third embodiment allows energy to be transferred between the window modules on one level or floor.

[0185] In the third embodiment, the pipe system 60 comprises the riser pair 73, which extends in a vertical direction through the riser shaft 113 over the respective levels 101 to 103. The string line pair 73 is embodied as a 4-pipe system. On the respective levels or floors 101 to 103, respective string line pairs 74 to 79 branch off from the riser pair 73 in the direction of the associated facade areas 111 and 112 or window modules or groups of window modules.

[0186] Since the number of switching devices required in the third embodiment is relatively small, wherein energy can be transferred at the same time, in particular between groups of window modules on different facade areas, the cooling and heating system in this design can be implemented in a technically simple and cost-effective manner. P3514PC00 Subsequent Application

[0187] 34

[0188] The fourth embodiment shown in Figs. 7 and 8 comprises switching devices 96 to 98 on, for example, two different levels for supplying the total of three levels of the building 100. The switching devices 96, 97 are associated with the level 101 in the facade area 111 and the levels 101 to 103 of the facade area 112 for operation with a first flow temperature. The switching device 98 supplies the window modules of the levels 102 and 103 of the facade area 111 with a second flow temperature. The switching devices 96 to 98 can in turn be arranged centrally in the building 100 in the riser shaft 113, for example.

[0189] According to this fourth embodiment, the switching devices for each group of window modules are controlled for heating or cooling, wherein an energy transfer between the groups of window modules is possible. The embodiment makes it possible to heat on one side of the facade area, e.g. 112, and simultaneously cool on the other side of the facade area 111.

[0190] The implementations shown in the first to fourth embodiments can also be combined with each other in any way. The more window modules are associated with a group and thus a switching device, the less flexibility there is, e.g. when the usable spaces inside the building are rearranged. The smaller the number of window modules per group, i.e. associated switching device, the greater the number of switching devices required. This increases the complexity of the pipe system and the production costs. Depending on the orientation of the facade areas, shading, etc., a suitable design must be found for each building 100. This can be done using simulations, for example.

[0191] Depending on the size and structure of the building, different embodiments can be used in different parts of the building, as described above.

[0192] Figs. 8 and 9 illustrate the above-mentioned energy transfer in more detail. The aim of energy transfer between individual groups of window modules is to use energy as locally as possible in order to minimize piping losses and keep the energy required for pumps and the like as low as possible.

[0193] In the embodiment example shown in Figure 9, there is a direct energy transfer between the window modules 1-i of the facade area 111 and the window modules 1-j of the facade area P3514PC00 Subsequent Application

[0194] 35

[0195] 112, which are arranged, for example, on the same level. In this example, the window modules 1-j of the facade area 112 are oriented towards the south, wherein the solar radiation is indicated by the arrow SR. For this purpose, a supply line 85 guiding to the window modules 1-j and a return line 86 are coupled to a distributor 84 via a first switching device 92. A supply line 87 guiding to the window modules 1-i and a return line 88 are coupled to the distributor 84 via a second switching device 94. The distributor 84 is coupled to the device for adjusting the temperature level 50.

[0196] A distributor arrangement comprising pumps and valves is designed to transfer the energy between the two groups of window modules, i.e. between the window modules 1-i of the facade area 111 and the window modules 1-j of the facade area 112, which are connected to different switching assemblies 92 and 94. In this example, the distributor arrangement comprises two valves 81, 82 and a pump 83. The distributor arrangement is designed to connect the return line 86 of the window modules 1-j through the valve 81 to the supply line 87 of the window modules 1-i and the supply line 85 of the window modules 1-j through the valve 82 to the return line 88 of the window modules 1-i in order to transfer energy. This enables efficient, direct energy transfer between the groups of window modules. As described, the pipe system of the two groups of window modules 1-i and 1-j is connected to the distributor 84 via the two switching devices 92, 94.

[0197] The result is no or low line losses and a low energy requirement for the drive current of pump 83, as small pumps can be used or the pumps do not have to run as much. In this variant, the energy can only be transferred between associated groups of window modules or circuits. In addition, a required amount of space must be provided on each level 101 to 103 of the building. In particular, this variant can preferably be combined with the third embodiment (Figs. 5 and 6).

[0198] In the embodiment shown in Figure 10, which in turn shows the window modules 1-i of the facade area 111 (north side) and 1-j of the facade area 112 (south side), energy is transferred (centrally or indirectly) between the respective window modules or groups of window modules via the device 50 for temperature adjustment or the distributor. This means that the supply lines 85, 87 and the return lines 86, 88 are connected directly (i.e. without the presence P3514PC00 Subsequent Application

[0199] 36 of the distribution arrangement comprising pumps and valves) to the distributor 84 via the respectively associated switching devices 92, 94. On the one hand, the distributor 84 is connected to the device for adjusting the temperature level 50 and to an (optional) heat sink 115, for example a geothermal heat storage tank.

[0200] The advantage is that the technology for energy transfer can be located in the technical center 114. A disadvantage is that there are greater line losses. In addition, a larger pump (not shown) is required, which requires a larger drive current. Furthermore, such pumps have to be operated longer or more frequently. Another advantage of the arrangement described is that energy can be transferred between all groups of window modules in the building. In addition, the space requirement on each building level 101 to 103 is eliminated. The alternative energy transfer arrangement shown in Fig. 10 works with all embodiments as described in connection with Figs. 1 to 8.

[0201] P3514PC00 Subsequent Application

[0202] Reference numerals

[0203] 1 window module

[0204] 1-i with i=l . . .n window module

[0205] 1-j with j=l . . .m window module

[0206] 2 exterior glazing

[0207] 3 interior glazing

[0208] 4 intermediate space

[0209] 41 inner intermediate space

[0210] 4A outer intermediate space

[0211] 5 air-liquid heat exchanger

[0212] 5G housing of the air-liquid heat exchanger

[0213] 6 illuminant (lower light strip)

[0214] 7 illuminant (upper light strip)

[0215] 8 leakage sensor

[0216] 9 ventilation duct

[0217] 10 fan

[0218] 10G fan housing

[0219] 11 sun protection device

[0220] 12 frame

[0221] 120 upper frame element

[0222] 12U lower frame element

[0223] 13 paneling element

[0224] 19 separating element

[0225] 20 local control unit

[0226] 25 central control unit

[0227] 30 usable space

[0228] 31 ceiling

[0229] 32 floor

[0230] 33 (multi-)sensor

[0231] 40 supply line

[0232] 41 return line P3514PC00 Subsequent Application

[0233] 38

[0234] 42 valve

[0235] 43 valve drive

[0236] 44 power supply line

[0237] 50 device for adjusting the temperature level

[0238] 51 combination generator

[0239] 60 pipe system

[0240] 61 supply line arrangement

[0241] 62 return line arrangement

[0242] 63 riser pair

[0243] 64-69 string line pair

[0244] 71 first line pair

[0245] 72 second line pair

[0246] 73 riser pair

[0247] 74-79 string line pair

[0248] 81 valve

[0249] 82 valve

[0250] 83 pump

[0251] 84 distributor

[0252] 85, 87 supply line

[0253] 86, 88 return line

[0254] 91 switching device

[0255] 92-95 switching device

[0256] 96-98 switching device in riser shaft

[0257] 100 building

[0258] 101-103 level (floor)

[0259] 104 floor surface

[0260] 105-107 storey floors 101-103

[0261] 108-110 storey ceiling 101-103

[0262] 111, 112 facade area P3514PC00 Subsequent Application

[0263] 39

[0264] 113 riser shaft

[0265] 114 technical center

[0266] 115 heat sink

[0267] H direction of air flow in heating mode

[0268] K direction of air flow in cooling mode

[0269] AS exterior of the building (also referred to as the environment)

[0270] IS interior of the building (also referred to usable space)

[0271] SR solar radiation

Claims

P3514PC00 Subsequent Application40Claims1. Cooling and heating system for a building (100), comprising: a device (50) for adjusting the temperature level, which is designed to transport a heat transfer medium from a respective first temperature level to a respective second temperature level in at least one circuit, the second temperature level being a flow temperature for a consumption arrangement, the device (50) for adjusting the temperature level being further designed to provide in one circuit, the heat transfer medium in a supply line of a first line pair (71) at a first, high temperature as the second temperature level for heating, and in another circuit, the heat transfer medium in a supply line of a second line pair (72) at a second, low temperature as the second temperature level for cooling, wherein the first, high temperature is greater than the second, low temperature; a pipe system (60) comprising a supply line arrangement (61) and a return line arrangement (62), in which the heat transfer medium circulates in the at least one circuit between the device (50) for adjusting the temperature level and the consumption arrangement; one or more switching devices (91-98) arranged in the pipe system (60) and being controllable by a control unit (25), wherein the one or more controllable switching devices (91-98) comprise a first connection unit, a second connection unit and a third connection unit, wherein the supply line and a return line of the first line pair (71) are connected to the first connection unit, wherein the supply line and a return line of the second line pair (72) are connected to the second connection unit, and wherein the supply line arrangement (61) and the return line arrangement (62) of the pipe system (60) leading to the consumption arrangement are connected to the third connection unit, wherein, depending on a first or a second switching position of the switching devices (91.98), the supply line following the relevant switching device (91-98) in the direction of flow is fed by the device (50) for adjusting the temperature level with the heat transfer medium of the one or another circuit whose second temperature level is selected / controlled depending on a desired operating mode; a plurality of window modules (1; 1-i; 1-j) as the consumption arrangement, which are designed for thermal regulation, comprising heating or cooling, of the buildingP3514PC00 Subsequent Application41 interior, wherein the plurality of window modules (1; 1-i; 1-j) are arranged in at least two facade areas (111, 112) oriented in different cardinal directions in one or more levels (101-103) of the building (100), wherein each window module (1; 1-i; 1-j) comprises the following features: an exterior glazing (2) and an interior glazing (3), wherein the exterior glazing (2) has a lower heat transfer coefficient (Ua) than the interior glazing (3) in order to thermally regulate the interior of the building via the interior glazing (3), and wherein an intermediate space (4) sealed against solids, in particular dust, is formed between the exterior glazing (2) and the interior glazing (3); an air-liquid heat exchanger (5) comprising a fluid-flow cooling / heating element with a fluid line in which a heat transfer medium is guided, wherein the at least one air-liquid heat exchanger (5) is arranged horizontally at the bottom or top in the intermediate space (4) in the installed state of the window module (1; 1-i; 1- j), so that air from the intermediate space (4) can flow through it; a fan (10) which, in the installed state of the window module (1; 1-i; 1-j), is arranged at the top or bottom, arranged horizontally, in the intermediate space (4) and which can be operated in a cooling mode and in a heating mode as operating modes of the window module, wherein, at least in the cooling mode, air is guided by the fan (10) through the air-liquid heat exchanger (5) in order to exchange heat between the air and the heat transfer medium and to guide the air in the intermediate space (4) in an air circuit; a separating element (19) arranged in the intermediate space (4), which runs parallel to the exterior glazing (2) and the interior glazing (3) and divides the intermediate space (4) into an inner intermediate space (41) and an outer intermediate space (4A) in order to generate a rising and a falling air flow in the intermediate space (4); and a controllably adjustable sun protection device (11) as a sun protection function, which is arranged in the outer intermediate space (4A) and adjoins the exterior glazing (2), so that when the sun protection function is activated, the outer intermediate space (4A) is formed completely or substantially between the sun protection device (11) and the separating element (19).P3514PC00 Subsequent Application422. Cooling and heating system according to claim 1, characterized in that the device (50) for adjusting the temperature level is selected from one of the following:Air-to-water heat pump with outside air; brine-to-water heat pump with geothermal probes or ground collectors;Water-to- water heat pump with groundwater or waste heat or cold local / di strict heating;Local or district heating grid that provides heating and / or cooling.

3. Cooling and heating system according to one of the preceding claims, characterized in that the device (50) for adjusting the temperature level is selected from one of the following: a local or district heating grid that provides heat; a combustion-based heating that consumes renewable energies, in particular biomass or hydrogen (H2), as fuel; a combustion-based heating that consumes fossil fuels, in particular gas or oil.

4. Cooling and heating system according to claim 4, characterized in that the device (50) for adjusting the temperature level additionally comprises a device for generating cold, in particular a compression chiller.

5. Cooling and heating system according to one of the preceding claims, characterized in that it comprises one controllable switching device (91), whereby all window modules (1-i; 1-j) in the building (100) are operated in the same operating mode.

6. Cooling and heating system according to one of the preceding claims, characterized in that it comprises at least one switching assembly (96-98) per level (101-103), which are individually controllable.

7. Cooling and heating system according to one of the preceding claims, characterized in that it comprises at least one switching assembly (92-95) per facade area (111-112), which are individually controllable.P3514PC00 Subsequent Application438. Cooling and heating system according to one of the preceding claims, characterized in that it comprises one switching assembly (92-95) per window module (1-i; 1-j), which are individually controllable.

9. Cooling and heating system according to one of claims 6 to 8, characterized in that it comprises a distribution arrangement (81-83) adapted to perform an energy transfer between two groups of window modules (1-i; 1-j) connected to different switching assemblies (92, 94).

10. Cooling and heating system according to claim 9, characterized in that the distribution arrangement (81-83) comprises valves (81, 82) and a pump (83) adapted to connect a return line (86) of a first group of window modules (1-j) through a first valve (81) to a supply line (87) of a second group of window modules (1-i) and a supply line (85) of the first group of window modules (1-j) through a second valve (82) to a return line (88) of the second group of window modules (1-i) for energy transfer.

11. Cooling and heating system according to one of the preceding claims, characterized in that the respective fluid lines of the air-liquid heat exchanger (5) of a respective window module (1) are connected on the input side to an adjustable valve (42), wherein a volume flow of the heat transfer medium through the air-liquid heat exchanger (5) of each window module (1; 1-i; 1-j) can be set individually by the position of the valve (42).

12. Cooling and heating system according to one of the preceding claims, characterized in that each window module (1; 1-i; 1-j) comprises a local control unit (20) which is designed to regulate and / or control at least one actuator of the window module (1; 1-i; 1-j), comprising a valve actuator (43) and / or a drive of the fan (10) and / or a drive of the sun protection device (11), in such a way that an actual room temperature value (Tist) received corresponds to a given target room temperature value (Tsoii).

13. Cooling and heating system according to claim 12, characterized in that each window module (1; 1-i; 1-j) comprises at least one sensor, comprising respective temperatureP3514PC00 Subsequent Application44 sensors for detecting the temperatures of the heat transfer medium at the inlet and / or outlet of the fluid line of the air-liquid heat exchanger (5) and / or the temperatures of the air at the inlet and / or outlet of the air-liquid heat exchanger (5), wherein the temperature values are provided to at least the local control unit (20) for processing for the regulation and / or control of the at least one actuator.

14. Cooling and heating system according to claim 12 or 13, characterized in that the local control unit (20) comprises an interface at which it receives at least the actual room temperature value (Tist) and the given target room temperature value (Tsoii) from a central control unit of the building (100) or a part of the building.

15. Cooling and heating system according to claim 12 or 13, characterized in that the central control unit is designed to control the switching position of a respective switching device (91-98) based on the actual room temperature value(Tist) and the given target room temperature value (Tsoii).

16. Cooling and heating system according to claim 15, characterized in that the central control unit is designed to control the switching position of a respective switching device (91-98) based on at least one further parameter, in particular a season and / or an outside temperature.

17. Method for the thermal regulation of a building by means of a cooling and heating system according to one of the preceding claims, in which depending on a first or second switching position, the supply line following the respective switching device (91-98) in the flow direction is fed by the device (50) for adjusting the temperature level with the heat transfer medium of the circuit whose first temperature level is selected / controlled depending on a desired operating mode.

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