Room-air temperature control device

Abstract

A room-air temperature control device having - an internal unit (3) which comprises a housing body (9) and internal-unit fluid connections (11) and is designed to control the temperature of room air (7) flowing through the internal unit (3), - a cassette (17), which is wall-mountable, - an external unit (5), which comprises external-unit fluid connections (25) and can be inserted into the cassette (17), - wherein, in an installed state, the external unit (5) is inserted in a cassette body (18) of the cassette (17), the cassette body (18) and the housing body (9) are spaced apart from each other and the external-unit fluid connections (25) and internal-unit fluid connections (11) are fluidically connected, as a result of which a combined heat-and-power machine flow circuit is formed by the internal unit (3) and the external unit (5), wherein a working medium flows through the combined heat-and-power machine flow circuit, - and wherein the external unit (5) is designed to change the temperature of the working medium which is flowing through the external unit (5) and by means of which the temperature of the room air (7) flowing through the internal unit (3) is controlled.

Description

[0001] Room air temperature control device

[0002] The invention relates to a room air temperature control device, its use and a method for renovating an existing building.

[0003] A room air temperature control device is used to regulate the temperature of an interior space in a building. This can include heating in colder seasons and cooling in warmer seasons. Such a room air temperature control device uses a cyclic process for temperature control and can also be referred to as an air conditioning system.

[0004] When renovating existing buildings, the retrofitting of a room air conditioning device is often desirable to increase comfort in the building's interior all year round, in addition to providing heating in winter through additional cooling in summer. However, a conventional, retrofitted room air conditioning device requires considerable structural effort to install fluid lines through the building, which carry a medium for transporting thermal energy to the room air conditioning device. Structural measures for this include, among other things, cutting slots in the walls to install the fluid lines and electrical supply lines inside. Such work is not only complex but also renders the interior uninhabitable, at least temporarily, meaning that the cost of relocating the residents is added to the construction work itself.

[0005] A device for controlling the temperature of an interior space that circulates and tempers room air and mixes it with fresh air is described in WO 2023 / 089136 A1. The device, referred to in this document as a recirculation module with fresh air admixture, can be inserted into a building wall of an interior space or fastened to the building wall of the interior space. The recirculation module comprises a housing with a front facing the interior space and an opposite rear side, as well as with a fresh air inlet, a room air inlet opening, and a room air outlet opening. The recirculation module further comprises a heat exchanger arranged in the housing, a room air radial fan arranged in the housing with an axially arranged air inlet facing the heat exchanger, such that room air flowing in as recirculated air through the room air inlet opening can be sucked through the heat exchanger.A fresh air fan arranged in the housing, which supplies fresh air, is located between the front and rear of the housing, laterally next to the room air radial fan. The recirculation module is designed so that fresh air is supplied to the recirculated air in the housing and the recirculated air with the added fresh air flows out of the room air outlet opening as supply air. Recirculated air is the room air flowing into the recirculation module. Supply air flows from the recirculation module into the interior and is the tempered recirculated air with added fresh air. The recirculation module is designed to circulate the room air in at least one interior space of the building and to regulate its temperature. Fresh air is added to improve the indoor climate. The addition of fresh air increases the comfort for people breathing in and out, and thus consuming air. The recirculation module is usually permanently mounted on the building wall or installed at least partially recessed into the building wall.In a building's temperature-regulating air conditioning system, the recirculation module contributes to temperature regulation and fresh air supply. Supply lines carry a fluid to the recirculation module, which regulates the room air temperature.

[0006] US 2023 / 0 213 215 A1 discloses an adjustable mounting assembly for an outdoor unit of an air conditioning system. In some embodiments, the outdoor unit may be capable of moving between multiple height positions on the adjustable mounting assembly, for example, from a higher loading position to a lower installation position. In some embodiments, the adjustable mounting assembly may, for example, include a balancing mechanism to facilitate the positional movement of the outdoor unit. In some other embodiments, the positional movement of the outdoor unit may be achieved by folding and / or unfolding a scissor lift mechanism.

[0007] JP H11 - 190 537 A shows an indoor machine for an air conditioning system with a ventilation function, by which indoor air is converted into outdoor air while the interior of a room is air-conditioned.

[0008] DE 296 09 754 U1 shows a ceiling air outlet for air conditioning systems with an elongated housing which has a supply air inlet and at least one outlet gap on the room side.

[0009] CN 1 12 212 417 A shows a multifunctional fastening device for an outdoor unit of a heating, ventilation and air conditioning system.

[0010] The JP H06 - 18 819 U shows an air conditioning unit bracket for installation in the house.

[0011] JP H10 - 227 492 A shows the installation of an outdoor unit on a wall outside a window by suspending the outdoor unit by sliding a pair of sliding projections attached to the outdoor unit from top to bottom into support struts and lowering them.

[0012] CN 1 14 234 299 A shows a prefabricated structure for accommodating the outdoor unit of an air conditioning system.

[0013] CN 1 15 597 128 A shows an outdoor compressor for split air conditioners. CN 2 17 402 706 U shows an installation frame for an outdoor unit of an air conditioner. The installation frame for the outdoor unit includes a wall support bracket that is used to install on a window of a wall. The wall support bracket can be adjusted in a telescopic mode so that the two ends of the wall support bracket can respectively abut the two inner wall surfaces of the window. The outdoor unit support bracket is connected to the wall support bracket and can abut the outer side of the wall. The outdoor unit support bracket is provided with a mounting cavity that is used to accommodate the outdoor unit.

[0014] JP 2003 - 106 574 A shows a split air conditioner that does not require separate installation of fasteners on a window frame or separate attachment of fasteners to an interior wall when the split air conditioner is installed on the window frame.

[0015] The task is to provide a room air temperature control device whose installation in existing buildings is easier.

[0016] The object is achieved by a room air temperature control device having the features of claim 1. It comprises an indoor unit that includes a housing body and indoor unit fluid connections and is designed to temperature control room air flowing through the indoor unit. The room air temperature control device also includes a wall-mountable cassette and an outdoor unit that includes outdoor unit fluid connections and that can be inserted into the cassette. In an installed state, the outdoor unit is inserted into a cassette body of the cassette, and the cassette body and the housing body are spaced apart from one another. The outdoor unit fluid connections and the indoor unit fluid connections are fluidly connected, thereby forming a combined heat and power flow circuit through the indoor unit and the outdoor unit. A working fluid flows through the combined heat and power flow circuit.The outdoor unit is designed to change the temperature of the working medium flowing through the outdoor unit, which tempers the room air flowing through the indoor unit in the indoor unit.

[0017] The room air temperature control device is a combined heat and power engine that uses a cyclic process to transport heat energy from a lower temperature level to a higher one. The room air temperature control device acts like an air conditioner, acting as a heat pump for heating and as a refrigeration unit for cooling. The heat energy is transported by the working fluid in the combined heat and power engine flow circuit. During the cyclic process, the working fluid undergoes a pressure change, which can be accompanied by a phase change.

[0018] The room air temperature control device is used in a building with an interior space and a building exterior wall, wherein the indoor unit is attached to or in a wall of the interior space and the cassette is mounted on the building exterior wall and the outdoor unit is inserted into the cassette so that the outdoor unit housing is held by the cassette.

[0019] The room air temperature control device is a split unit with an indoor unit located in the interior and an outdoor unit installed in the cassette mounted on the building's exterior wall. The indoor unit can be wall-mounted or installed in the wall, for example, in a frame behind a wall panel. Both the indoor unit and the outdoor unit each contain a section of the combined heat and power flow circuit, which are fluidly connected when installed, thus enabling the cycle. The indoor unit is used to temperature control the interior. It can be constructed similarly to the recirculation module mentioned above. In one version, the room air temperature control device comprises more than one indoor unit. The indoor units are coupled to the same outdoor unit. Two or three indoor units are typically used in this case. The combined heat and power flow circuit can flow through the indoor units in series and / or in parallel.

[0020] When installed, the components are connected to one another so that the cycle enables the temperature control of the room air. The housing body of the indoor unit and the cassette body with the inserted outdoor unit are spaced from one another by the building's outer wall. The housing body of the indoor unit and an outdoor unit housing are the solid shells of the indoor unit and outdoor unit respectively. They protect and surround the internal components of the devices. The fluid connections are provided on the housings. The fluidic connection between the outdoor unit and indoor unit is established via their fluid connections. This can be achieved by a direct connection of the fluid connections if the fluid connections of at least one device are designed such that they protrude through the building's outer wall. Alternatively, connecting means such as clamps, hoses or pipes can be provided to connect the fluid connections of the devices to one another.

[0021] The fluidic connection between the indoor unit and outdoor unit closes the power plant flow circuit through the indoor unit and the outdoor unit, allowing a working fluid to flow through the outdoor unit and the indoor unit during operation. The fluidic connection enables the flow of a gas or liquid. Heat is transferred between the indoor unit and the outdoor unit via the working fluid in order to heat or cool the interior. Energy is transported by exerting work, in particular compression and expansion of the working fluid, which may be accompanied by a phase change. The temperature of the working fluid is changed in the outdoor unit. For this purpose, not only is heat absorbed or released from or to the outside air in the outdoor unit, but advantageously the working fluid in the outdoor unit also expands and compresses. The temperature of the room air is controlled by the indoor unit.Heat exchangers are provided within the units for heat exchange with the environment and for tempering the room air. The room air tempering device operates independently of an external fluid supply and discharge line.

[0022] The outdoor unit is not attached directly to the building's exterior wall, but rather by means of a cassette. The cassette has a cassette body designed to accommodate and hold the outdoor unit. Its basic shape advantageously corresponds to that of the outdoor unit housing it accommodates. Connections can be provided on the cassette body. The cassette, in particular the cassette body, is mounted on the exterior wall, and then the outdoor unit is inserted and secured. Insertion and securing can take place in the same step. The outdoor unit can be attached in a form-fitting manner, for example by bracing, and / or by fastening means, e.g. screws. The cassette is advantageously designed such that the fluidic connection between the indoor unit and outdoor unit runs through it.For this purpose, fluid connections can be provided on the cassette body, which are fluidically connected to the fluid connections of the outdoor unit and indoor unit. Alternatively, it is also conceivable to route connecting means or the fluid connections of one of the devices through a recess in the cassette body to form the fluid connection between the outdoor unit and indoor unit.

[0023] Advantageously, the indoor unit has a fresh air opening and is designed to supply fresh air from the fresh air opening to the room air flowing through the indoor unit. In this design, the fresh air is mixed with the tempered air in the indoor unit. The outdoor unit does not contribute to the fresh air mixing. A fresh air box for fresh air mixing in the outdoor unit, as provided in conventional air conditioning systems, is not required, which reduces the dimensions of the outdoor unit. The room air temperature control device is used in such a way that the fresh air opening of the indoor unit has access to fresh air, for example, through a recess in the building's outer wall. Access can be provided, for example, through a roller shutter box, which is associated with simple installation, since only a recess needs to be drilled into the roller shutter box instead of through a hole in the building wall.

[0024] In one design, the indoor unit has a room air inlet and a room air outlet, as well as a nozzle designed so that the majority of the room air blown out of the room air outlet does not flow back in through the room air inlet. The room air to be tempered flows through the room air inlet into the indoor unit and out through the room air outlet. In the indoor unit, it is tempered by a heat exchanger, through which the working medium also flows. To prevent incoming and outgoing room air from circulating in front of the indoor unit, at least one nozzle is provided through which the outgoing room air is blown out at a higher flow rate, so that only a small proportion of the blown out room air flows straight back through the room air inlet into the indoor unit. This ensures good circulation of the room air in the interior.This is particularly advantageous when the room air inlet and room air outlet are located on the same side of the indoor unit.

[0025] In one design, the cassette, particularly the cassette body, has a slot through which the outdoor unit can be inserted. The inserted outdoor unit, particularly its outside air inlet and outside air outlet, is accessible through the slot. The outdoor unit can be inserted into the cassette in a final installation step, after the fluid connection between the cassette and the indoor unit and the electrical supply have already been connected. This approach is advantageous during building renovations, where the outdoor units are inserted and secured after the facade insulation has been completed and the cassettes have been installed. The cassette also facilitates the attachment of facade cladding over the outdoor unit.This type of renovation is significantly less complex than so-called serial renovation, which involves the use of prefabricated, flat, building-wall-sized facade elements, including associated systems technology such as installation technology modules, prefabricated off-site, and their subsequent assembly as a whole onto existing buildings.

[0026] In one embodiment, the cassette has first fluid connections and second fluid connections, which are fluidically connected to the indoor unit when installed. The first fluid connections are fluidically connectable to the outdoor unit, so that a fluidic connection is formed when the outdoor unit is inserted. Inserting the cassette and forming the fluidic connection take place in the same installation step. This can be achieved by interlocking the fluid connections once the outdoor unit reaches its final position in the cassette.

[0027] In one design, the cassette has an electrical connection for an external power supply. The cassette is electrically connectable to the outdoor unit or, when installed, is connected so that it is powered via the electrical connection, and the indoor unit has its own electrical supply. Alternatively, the cassette is connectable or connected to both the outdoor unit and the indoor unit. In this case, both the indoor and outdoor units are powered via the cassette, so no electrical supply lines to the indoor unit are required inside the unit. The electrical supply to the room ventilation and temperature control device is provided solely via the cassette and / or the outdoor unit.

[0028] In one embodiment, the cassette includes an electrical connector for the outdoor unit, which can be connected to an electrical connector of the outdoor unit, so that an electrical connection is formed when the outdoor unit is inserted. Inserting the cassette and forming the electrical connection take place in the same installation step. This can be achieved by interlocking the connectors once the outdoor unit reaches its final position in the cassette. Such connectors can be configured, for example, as a socket and a plug.

[0029] The connections described above are advantageously arranged inside the cassette body for the outdoor unit and outside for the indoor unit.

[0030] A process for the renovation of an existing building with an interior and an exterior wall, in which a room air

[0031] The installation of a temperature control device involves mounting the cassette on the building's exterior wall, fastening the indoor unit to or in an interior wall, establishing the fluid connection between the cassette and the indoor unit through the building's exterior wall, and inserting the outdoor unit into the cassette. This type of renovation is carried out on the outside of the existing building, with the exception of mounting the indoor unit and connecting it to the cassette, so that the residents of the existing building are minimally impacted. It is advantageous to connect an external power supply to the cassette on the outside of the existing building to supply the outdoor unit. The indoor unit has a separate power supply. Alternatively, both the outdoor and indoor units can be supplied via the cassette. This minimizes the structural measures required inside.Advantageously, a facade layer, in particular facade insulation, is attached to the building's exterior wall and the cassette is mounted on the building's exterior wall in such a way that the cassette is embedded in the facade layer. A recess is provided in the facade layer into which the cassette is inserted. In one design, the cassette is arranged above the window openings so that the outside air inlet and outlet point downwards towards the window opening. In one design, the facade layer is constructed in several parts with facade elements arranged in a tile-like manner on the building's exterior wall. Embedding the cassette in the facade insulation enables an unobtrusive facade design, as the cassette and the facade insulation can be arranged perpendicular to the building's exterior wall with little or no offset. The insulating facade layer and the cassette can be concealed by additional facade cladding.The facade layer can, for example, include panel-shaped insulation elements or decorative facade elements for the visual design of the facade. Plastering is also possible.

[0032] Below, some examples are explained in more detail using the drawings. They show:

[0033] Fig. 1 is a schematic sectional view through an embodiment of a room air temperature control device,

[0034] Fig. 2 is a schematic sectional view through another embodiment of a room air temperature control device,

[0035] Fig. 3 schematically shows a front view section of an embodiment of a building,

[0036] Fig. 4 shows schematically the structure of an embodiment of an indoor unit, Fig. 5 shows schematically a sectional view through an embodiment of a

[0037] cassette, and

[0038] Fig. 6 shows schematically the structure of an embodiment of an outdoor unit.

[0039] In the figures, identical or functionally equivalent components are provided with the same reference numerals.

[0040] Fig. 1 shows a schematic sectional view through an embodiment of a room air temperature control device in an installed state, which is mounted on the inside and outside of a building's exterior wall 1. The room air temperature control device is a heat engine designed as a split unit with an indoor unit 3 and an outdoor unit 5. A heat engine flow circuit (not shown in Fig. 1) extends through the indoor unit 3 and the outdoor unit 5, through which a working medium flows for energy transfer.

[0041] The indoor unit 3 is designed to control the temperature of room air 7 flowing through the indoor unit 3. The indoor unit 3 comprises a housing body 9 with a cuboidal basic shape and indoor unit fluid connections 11, between which a section of a power machine flow circuit runs. A room air inlet 13 and a room air outlet 15 are arranged in the housing body 9, through which room air 7 flows into and out of the indoor unit 3. The indoor unit 3 is arranged in an interior space of a building on the building's outer wall 1. In this exemplary embodiment, the indoor unit 3 is mounted on top of a window opening 41, such that the room air inlet 13 and the room air outlet 15 on the underside of the housing body 9 point towards the window opening 41. A cassette 17 is fastened to the outside of the building's outer wall 1. An essential component of the cassette 17 is a cassette body 18 for receiving and holding the outdoor unit 5.The cassette 17 has a cuboidal basic shape that defines an internal cavity that is open at the bottom. The open bottom forms an insertion opening 19 for the outdoor unit 5. The cassette 17 serves to accommodate, hold, and protect the outdoor unit 5.

[0042] The outdoor unit 5 has an outdoor unit housing 23 and outdoor unit fluid connections 25, between which another section of a motor flow circuit runs in the outdoor unit housing 23. An outside air inlet 33 and an outside air outlet 35 are provided on the underside of the outdoor unit housing 23, through which outside air 37 flows into and out of the outdoor unit 5. Outside air 37 can also be referred to as ambient air. The outdoor unit 5 can be inserted into the cassette 17 through the insertion opening 19, so that the outside air inlet 33 and the outside air outlet 35 are accessible via the insertion opening 19.

[0043] Fig. 1 shows the outdoor unit 5 inserted and secured into the cassette 17.

[0044] The outdoor unit 5 is designed to change the temperature of the working medium flowing through the outdoor unit 5. The working medium then flowing through the indoor unit 3 regulates the temperature of the room air 7 in the interior.

[0045] The outdoor unit 5 inserted into the cassette 17 and the indoor unit 3 are arranged on opposite sides of the building's outer wall 1. The housing body 9 and a cassette body 18 of the cassette 17 are spaced from each other by the building's outer wall 1. The indoor unit 3 and the outdoor unit 5 are fluidically connected by a continuous building wall recess 21, for example a bore in the building's outer wall 1, so that the heat engine flow circuit runs via the fluidic connection through the indoor unit 3 and the outdoor unit 5. Two fluid connections 11, 25 are provided on each unit 3, 5, one for the incoming working medium and one for the outgoing working medium.

[0046] The fluidic connection of the indoor unit fluid connections 11 and the outdoor unit fluid connections 25 is established by tubular fluid lines 27 between the indoor unit 3 and the cassette 17, which extend through the building wall recess 21. The cassette 17 is fluidic connected to the installed outdoor unit 5, so that a fluidic connection to the indoor unit 3 is formed via the cassette 17. First fluid connections 29 for a fluidic connection to the outdoor unit fluid connections 25 and second fluid connections 31 for a fluidic connection to the indoor unit 3 are provided on the cassette 17.

[0047] The indoor unit 3 and the outdoor unit 5 are parts of the combined heat and power engine designed as a room air temperature control device. The working fluid circulates in the combined heat and power engine flow circuit. In summer, the working fluid cooled in the outdoor unit 5 is pumped through the indoor unit 3 to cool the room air 7. In winter, the working fluid heated in the outdoor unit 5 is pumped through the indoor unit 3 to heat the room air 7. The room air 7 in the interior flows through the indoor unit 3, as indicated by the arrow, and is cooled or heated by a heat exchanger (not shown in Fig. 1) through which the working fluid flows. The energy required for temperature control is taken from the outside air 37, which flows through the outdoor unit 5, as indicated by the arrow.

[0048] The described room air temperature control device does not require an external fluid supply or discharge line for the working medium. Only an external power supply is required. This can be provided separately for indoor unit 3 and outdoor unit 5, or only for one of the units 3, 5, which is electrically coupled to the other unit 3, 5, so that both units 3, 5 are supplied.

[0049] The described room air temperature control device can be installed in an existing building with only minimal disruption to the occupants. The cassette 17 is mounted on the building's outer wall 1, and the indoor unit 3 is mounted on an interior wall, preferably the building's outer wall 1. A fluidic connection between the cassette 17 and the indoor unit 3 is formed through the building's outer wall 1, for example by drilling a continuous building wall recess 21 before or after installation and routing the fluid lines 27 through this and connecting them to the cassette 17 and the indoor unit 3. Finally, the outdoor unit 5 is inserted into the cassette 17. Access to the interior is only required for attaching the indoor unit 3 and its fluidic connection to the cassette 17. These steps are neither time-consuming nor do they involve major structural changes.

[0050] Fig. 2 shows a schematic sectional view through another embodiment of a room air temperature control device mounted on the inside and outside of a roller shutter box 39 in a building's exterior wall 1. The room air temperature control device comprises an indoor unit 3 and an outdoor unit 5. The following description focuses on differences from the previous embodiment to avoid duplication.

[0051] In this exemplary embodiment, a roller shutter box 39 is provided in the window opening 41 of the building's outer wall 1. The roller shutter is not shown for the sake of clarity. The indoor unit 3 is fastened to a side of the roller shutter box 39 facing the interior, and the cassette 17, in which the outdoor unit 5 is inserted and fastened, is arranged on an opposite outer side of the roller shutter box 39. In this exemplary embodiment, the indoor unit 3 is arranged in the wall, for example, behind a wall cladding 75. To hold the indoor unit 3, a frame 77 is provided between the building's outer wall 1 and the wall cladding 75. In one exemplary embodiment, the indoor unit 3 can be pushed into the frame 77.

[0052] The indoor unit 3 has a fresh air opening 43 through which fresh air 45 can flow into the indoor unit 3. In the roller shutter box 39, a roller shutter box recess 47 is formed in the area of ​​the fresh air opening 43, through which fresh air 45 can flow via the roller shutter box 39 into the indoor unit 3. The fluidic connection via fluid lines 27 between the indoor unit 3 and the cassette 17 runs through the roller shutter box 39. In addition, an electrical line connection 49 is also provided between the indoor unit 3 and the cassette 17, which runs through the roller shutter box 39. The connections through the roller shutter box 39 facilitate the installation of the room air temperature control device, since recesses only need to be formed in the side walls of the roller shutter box 39, which is less complex than drilling a recess through the building's outer wall 1.Nevertheless, the connections can be routed entirely or partially through the solid exterior wall 1 of the building, even if a roller shutter box 39 is present. A less complex alternative is to route the connections through a window frame 42.

[0053] The indoor unit 3 is designed to temper the room air 7 flowing through the indoor unit 3 and to mix it with fresh air 45, which is conveyed into the indoor unit 3 through the fresh air opening 43 and there combined with room ventilation 7. The room ventilation 7 enriched with fresh air 45 increases the comfort in the interior. On the outside of the building's outer wall 1, a facade insulation 51 is applied as an exemplary embodiment of a facade layer, which leaves out the window opening 41 and the area in which the cassette 17 is arranged. The cassette 17 is integrated into the facade insulation 51 and embedded therein. The facade insulation 51 extends as far as the side walls and the ceiling wall of the cassette 17 and is flush with the front of the cassette. A facade cladding 53 is arranged above the facade insulation 51 and the cassette 17.

[0054] The room air temperature control device can be installed as part of a renovation in an existing building. The cassette 17 is attached to the outside of the building's outer wall 1, and the indoor unit 3 is held opposite it in the frame 77 on the inside of the building's outer wall 1. A fluidic connection between the cassette 17 and the indoor unit 3 is formed by the building's outer wall 1, in this embodiment by the roller shutter box 39. A facade layer, in particular a facade insulation 51, is applied to the outside of the building's outer wall 1. Finally, the outdoor unit 5 is inserted into the cassette 17. Access to the interior is only required for attaching the indoor unit 3 and its fluidic connection to the cassette 17. It is also conceivable to provide insulation on the inside of the building's outer wall 1, for example, between the building's outer wall 1 and the wall cladding 75.

[0055] Fig. 3 schematically shows a front view section of a building with room air temperature control devices installed above window openings 41, such as those described above. The cassettes 17 with the inserted outdoor units 5 extend along the top of the window openings 41. The cassettes 17 can be mounted on the roller shutter boxes 39, if present. The building's outer wall 1 is clad with plate-shaped facade elements 55, in which the cassettes 17 are embedded, i.e., surrounded by them laterally. The cassettes 17 can be arranged with their front sides flush, protruding, or recessed from the front sides of the facade elements 55. In this exemplary embodiment, the facade elements 55 form the outer facade layer. They can have an insulating function and / or be of a decorative nature.The outdoor units 5 can be designed in such a way that their external appearance harmonizes with that of the facade elements 55 or forms a visually appealing contrast, so that both facade elements 55 and cassettes 17 have an additional decorative function.

[0056] The electrical supply to the room air temperature control devices is provided externally via the cassettes 17, which are connected to an external electrical supply line 57 and supply the outdoor units 5. The supply lines 57 run beneath the facade elements 55. The electrical supply to the indoor units 3 is provided via the cassettes 17 through the building's exterior wall 1.

[0057] The renovation of an existing building with the installation of room air conditioning devices and facade elements 55 is largely carried out via the building's exterior. In particular, the laying of pipes inside for connecting the room air conditioning devices is not necessary.

[0058] Fig. 4 schematically shows the structure of an indoor unit 3. The indoor unit 3 can be installed above a window opening 41 in the interior. The arrangement of the indoor unit 3 close to the ceiling initially heats the upper interior area, supported by radiant heat reflected from the interior ceiling. Heating the upper interior area has a significant impact on well-being.

[0059] The indoor unit 3 has a cuboid-shaped, elongated, flat housing with a room air inlet 13 and a room air outlet 15 arranged on the underside, through which room air 7 flows into and out of the housing body 9. The room air inlet 13 is elongated and is arranged at the front, facing the image plane. The room air outlet 15 is elongated and arranged at the rear. The room air inlet 13 and the room air outlet 15 comprise slots in the housing body 9.

[0060] A section 4 of a power machine flow circuit, through which working fluid flows, runs between indoor unit fluid connections 11. The electrical supply is provided via an electrical indoor unit connection 103 for supply, control, and data exchange, which is coupled to an indoor unit control 98 on one side, which controls electrical components in the housing body 9.

[0061] In an upper housing area, a flow channel 61 is provided, which runs along an upper longitudinal side and is designed as an elongated, rectangular cavity between the front and rear of the housing body 9.

[0062] Adjacent to one of the transverse sides, a fresh air fan 59 for sucking in and distributing fresh air 45 is provided between the front and rear sides. A filter is arranged between the fresh air fan 59 and a rear fresh air opening 43 in the housing body 9. The fresh air fan 59 is a radial fan and is designed to suck in fresh air 45 in the axial direction through the fresh air opening 43 and to discharge it radially. A fresh air flow guide 79, designed as a spiral-curved wall, runs around the fresh air fan 59 between the front and rear sides. This fresh air flow guide opens into the flow channel 61 and directs the fresh air 45 into the flow channel 61.

[0063] An indoor unit heat exchanger 63 is arranged at the front of the housing. The indoor unit heat exchanger 63 runs longitudinally between an indoor unit controller 98 and the fresh air fan 59, from which it is separated by a wall, so that the fresh air 45 cannot flow directly from the fresh air fan 59 to the indoor unit heat exchanger 63. The indoor unit heat exchanger 63 is arranged between the flow duct 61 and the room air inlet 13. The flow duct 61 is open on its lower side facing the heat exchanger 63, so that the fresh air 45 can flow from the flow duct 61 to the indoor unit heat exchanger 63.

[0064] The indoor unit heat exchanger 63 has a flat, cuboidal shape. It comprises fins 65 running from top to bottom, which direct the airflow vertically. The room ventilation 7, flowing in as recirculated air, hits the indoor unit heat exchanger 63 from below and is directed vertically upward. Fresh air 45, flowing from the top through the flow duct 61, hits the indoor unit heat exchanger 63 and is directed vertically downward.

[0065] Radial room air fans 67, each with an axial air inlet, are arranged between the indoor unit heat exchanger 63 and the rear panel. These fans are shown in dashed lines. They are arranged side by side, offset longitudinally along the rear panel, so that their air inlets face the indoor unit heat exchanger 63 and can draw air through the indoor unit heat exchanger 63.

[0066] The axially arranged air inlets of the room air radial fans 67 are arranged in the opposite direction to the air inlet of the fresh air fan 59, which faces the fresh air opening 43. The flow duct 61 acts as a flow barrier to the room air radial fans 67, but allows air passage to the indoor unit heat exchanger 63, so that the fresh air 45 must flow from the flow duct 61 via the indoor unit heat exchanger 63 to the room air radial fans 67.

[0067] The area surrounding each radial room air fan 67 is designed as a room air flow guide 69, with a spiral-shaped, curved wall running around each radial room air fan 67 between the rear and the indoor unit heat exchanger 63. The room air flow guide 69 directs the room air 7, with mixed fresh air 45, flowing out of the radial room air fan to the room air outlet 15. The outlet area of ​​the room air flow guide 69 tapers, forming a nozzle 71 to increase the speed of the outgoing room air 7 with mixed fresh air 45 and thereby blow it deep into the interior. The nozzles 71 on the room air outlet 15 ensure that only a small amount of the outgoing room air 7 is immediately sucked back in, thus preventing a circuit from forming on the underside of the indoor unit; instead, the room air 7 is circulated within the interior.

[0068] The provision of fresh air mixing by the indoor unit 3 reduces the effort in the outdoor unit 5, which does not need to have a fan box and can therefore be designed more compactly.

[0069] Fig. 5 shows a schematic section through the cassette 17, which is intended to accommodate, hold, and protect the outdoor unit 5. A cassette body 18 is an essential component of the cassette 17 and is designed to accommodate and hold the outdoor unit 5. The cassette body 18 has a cuboidal basic shape, the underside of which is open and defines an insertion opening 19 for inserting the outdoor unit 5 through this insertion opening 19. The cassette 17 can be made, for example, of metal or weather-resistant plastic. In an alternative exemplary embodiment, not only the insertion opening 19 is open, but also other sides of the cassette 17, for example if the outside air inlet 33 and outside air outlet 35 are arranged on different sides of the outdoor unit 5. Connections for the connection to the indoor unit 3 and the outdoor unit 4 are provided on the cassette body 18, in particular on the inside and outside of its walls.

[0070] The cassette 17, in particular the cassette body 18, is wall-mountable and has a fastening device for mounting on the building's exterior wall 1. In this embodiment, holes 73 are provided in a cassette rear wall to fasten the cassette 17 to the building's exterior wall 1 by means of screws or hooks.

[0071] The cassette 17 comprises first fluid connections 29, which can be connected to outdoor unit fluid connections 25 (not shown in Fig. 5), and second fluid connections 31, which can be connected to indoor unit fluid connections 11 (not shown in Fig. 5). The connection can be made directly, for example by pushing the connections of two components into one another, or indirectly, for example by connecting means such as hoses or pipes. The fluidic connection between the indoor unit 3 and the outdoor unit 5 is made via the first and second fluid connections 29, 31 on the cassette body 18. The fluid connections 11, 25, 29, 31 can be designed as a click connection so that they can be easily plugged together and snap into place.

[0072] In addition, the cassette 17 has an electrical supply connection 81, via which at least the electrical supply to the outdoor unit 5 is provided. For this purpose, a first electrical connection 83 is provided on the cassette body 18, which can be coupled to the outdoor unit 5. In addition, this exemplary embodiment also has a second electrical connection 85, via which an electrical connection to the indoor unit 3 can be made. In addition to the electrical supply, electrical connections for control and synchronization are provided between the indoor unit 3 and the outdoor unit 5. It is also conceivable for control and synchronization to take place not via the electrical connections 83, 85, 101, 103 but via an optical or wireless connection. The connection of the electrical connections can be made directly, for example by pushing the connections into one another, or indirectly, for example by connecting means.In addition, an outdoor unit control 99 is provided in the outdoor unit 5, which is coupled to the indoor unit control 98 for the purpose of controlling the entire room air temperature control device and synchronizing the units 3, 5.

[0073] In this exemplary embodiment, cassette fastening means 87 for holding and securing the outdoor unit 5 are arranged on the outside of the cassette cover of the cassette body 18, in order to engage with outdoor unit fastening means 89 on the outdoor unit housing 23 (not shown in Fig. 5). They can be designed, for example, as a sliding block and groove. An alternative is a receptacle for a rotatable latch, in which locking is achieved by rotating the latch on the outdoor unit 5.

[0074] In this exemplary embodiment, the first electrical connection 83 and the first fluid connections 29 for the outdoor unit 5 are arranged laterally, on a transverse side of the cassette 17. During assembly, the outdoor unit 5 is inserted into the cassette 17 from below and then moved towards the connections so that the connections 25, 29, 83, 101 of the outdoor unit 5 and the cassette 17 are connected and engage. During the longitudinal movement towards the connections 29, 83, the fastening means 87, 89 of the cassette 17 and the outdoor unit 5 also engage with each other, so that the outdoor unit 5 is securely held and fixed in its position. Additional fastening means, for example screws, can be provided for securing. Fig. 6 schematically shows an embodiment of an outdoor unit 5. The outdoor unit 5 has an outdoor unit housing 23 with a cuboid, elongated basic shape and can be inserted into the cassette 17 and, in particular, can be fastened therein in a form-fitting manner.The outdoor unit 5 is designed to change the temperature of the working medium flowing through the outdoor unit 5. On the underside of the outdoor unit housing 23, the outside air inlet 33 and the outside air outlet 35 are formed as slots in the outdoor unit housing 23 and are accessible through the insertion opening 19 when the outdoor unit 5 is inserted into the cassette 17, allowing outside air to flow in and out.

[0075] The outdoor unit 5 has outdoor unit fastening means 89 for holding it in the cassette 17, particularly in the cassette body 18. In this embodiment, they are arranged on the top of the housing and, when inserted, engage with the cassette fastening means 87, as already described in connection with Fig. 5. Examples of these are grooves or sliding blocks or rotary latches and receptacles for the rotary latch.

[0076] A section 6 of a power machine flow circuit, through which working fluid flows, runs between the outdoor unit fluid connections 25. The outdoor unit fluid connections 25 are fluidically connectable to the first fluid connections 29 of the cassette 17. Additionally, an electrical outdoor unit connection 101 is provided for power supply, control, and data exchange. The connections 25, 101 are arranged and designed such that, when the outdoor unit 5 is inserted, they form a fluidic or electrical connection with the connections 29, 83 of the cassette 17.

[0077] The energy required to control the temperature of the working fluid is extracted from the ambient outside air 37. An outdoor unit heat exchanger 91 is provided inside the outdoor unit 5. This heat exchanger absorbs energy from the flowing outside air 37 in order to heat or cool the working fluid flowing in the outdoor unit heat exchanger 91. The meandering representation of the outdoor unit heat exchanger 91 is merely exemplary. Other embodiments are a plate heat exchanger or a finned heat exchanger, as described in connection with Fig. 4. A fan 93 is provided to convey the outside air 37 through the outdoor unit 5. In the cyclic process, heat absorption and release occur at different pressures. Therefore, a compressor 95 and an expansion element 97 are also provided in the outdoor unit 5, between which the outdoor unit heat exchanger 91 is coupled.

[0078] The fluidic connections between the indoor unit 3 and the outdoor unit 5 form the power generation flow circuit for the working medium, by means of which the interior can be heated or cooled.

[0079] During cooling, the working medium is compressed in the compressor 95 and then flows through the outdoor unit heat exchanger 91. The heat is dissipated to the outside air 37. The working medium then flows through the expansion element 97. The pressure reduction leads to cooling. The cooled working medium is passed through the indoor unit 3, which cools the room air 7. The working medium heated in the indoor unit 3 is passed into the outdoor unit 5 to the compressor 95, and the cycle begins again. During heating, the cycle runs in the reverse direction: The working medium is compressed in the compressor 95, thereby heating it, and flows into the indoor unit 3. The heated working medium is passed through the indoor unit 3, heating the room air 7 flowing through the indoor unit 3. The working medium cooled in the indoor unit 3 is passed into the outdoor unit 5 to the expansion element 97. The pressure reduction leads to further cooling.The outside air 37 heats the working medium, which is then fed to the compressor 95, and the cycle begins again. The described design of the outdoor unit 5, in which the compressor 95 and the expansion element 97 are arranged, is merely an example. It is also conceivable to arrange the compressor 95 and / or the expansion element 97 in the indoor unit 3 instead. However, the described arrangement has the advantage that only the temperature control function is located in the indoor unit 3, without the compressor 95 and the expansion element 97 (but with fresh air admixture). Such an indoor unit 3 does not necessarily have to be operated with the outdoor unit 5, but can also be operated with a central heat pump / refrigeration system or heating / cooling system for the entire house. In this case, the working medium is supplied through supply lines of the house installation in a conventional manner.

[0080] The features specified above and in the claims, as well as those evident from the illustrations, can be advantageously implemented both individually and in various combinations. The invention is not limited to the described embodiments, but can be modified in many ways within the scope of expert knowledge.

[0081] Reference symbol

[0082] I Building exterior wall

[0083] 3 Indoor unit

[0084] 4, 6 Combined heat and power flow circuit section

[0085] 5 Outdoor unit

[0086] 7 Ventilate the room

[0087] 9 Housing body

[0088] II Indoor unit fluid connection

[0089] 13 Room air inlet

[0090] 15 Room air outlet

[0091] 17 cassette

[0092] 18 cassette bodies

[0093] 19 Insertion opening

[0094] 21 Building wall recess

[0095] 23 Outdoor unit housing

[0096] 25 Outdoor unit fluid connection

[0097] 27 Fluid line

[0098] 29 first fluid connection

[0099] 31 second fluid connection

[0100] 33 Outside air inlet

[0101] 35 Outside air outlet

[0102] 37 Outside air

[0103] 39 roller shutter box

[0104] 41 Window opening

[0105] 42 window frames

[0106] 43 Fresh air opening

[0107] 45 Fresh air

[0108] 47 Roller shutter recess

[0109] 49 electrical cable connection facade insulation facade cladding facade element external supply line fresh air fan flow duct indoor unit heat exchanger fin

[0110] Room air radial fan

[0111] Room air flow guide nozzle

[0112] Hole

[0113] Wall cladding

[0114] Frame

[0115] Fresh air flow guide Electrical supply connection First electrical connection Second electrical connection Cassette fixing means Outdoor unit fixing means Outdoor unit heat exchanger Fan

[0116] compressor

[0117] Expansion element Indoor unit control Outdoor unit control Outdoor unit electrical connection Indoor unit electrical connection

Claims

Patent claims:

1. Room air temperature control device with - an indoor unit (3) comprising a housing body (9) and indoor unit fluid connections (11) and which is designed to temper room air (7) flowing through the indoor unit (3), - a cassette (17) which can be mounted on the wall, - an outdoor unit (5) comprising outdoor unit fluid connections (25) and which can be inserted into the cassette (17), - wherein, in an installed state, the outdoor unit (5) is inserted into a cassette body (18) of the cassette (17), the cassette body (18) and the housing body (9) are spaced apart from one another, and the outdoor unit fluid connections (25) and indoor unit fluid connections (11) are fluidically connected, whereby a power generation flow circuit is formed through the indoor unit (3) and the outdoor unit (5), wherein a working medium flows through the power generation flow circuit, - and wherein the outdoor unit (5) is designed to change the temperature of the working medium flowing through the outdoor unit (5), by means of which the room air (7) flowing through the indoor unit (3) is tempered.

2. Room air temperature control device according to claim 1, wherein the indoor unit (3) has a fresh air opening (43) and is designed to mix fresh air (45) flowing in from the fresh air opening (43) with the room air (7) flowing through the indoor unit (3).

3. Room air temperature control device according to claim 1 or 2, wherein the indoor unit (3) has a room air inlet (13) and a room air outlet (15) as well as a nozzle (71) which is designed such that room air (7) blown out of the room air outlet (15) does not flow back in predominantly through the room air inlet (13).

4. Room air temperature control device according to one of the preceding claims, wherein the cassette body (18) has an insertion opening (19) through which the outdoor unit (5) can be inserted, wherein in the installed state the inserted outdoor unit (5), in particular its outside air inlet (33) and its outside air outlet (35), is accessible through the insertion opening (19).

5. Room air temperature control device according to one of the preceding claims, wherein the cassette (17) has first fluid connections (29) and second fluid connections (31), wherein the second fluid connections (31) are fluidically connected to the indoor unit (3) in the installed state, and wherein the first fluid connections (29) are fluidically connectable to the outdoor unit (5) so that a fluidic connection is formed when the outdoor unit (5) is inserted.

6. Room air temperature control device according to one of the preceding claims, wherein the cassette (17) has an electrical supply connection (81) for an external electrical supply and the cassette (17) is electrically connected to the outdoor unit (5) in the installed state or is electrically connected to both the outdoor unit (5) and the indoor unit (3) in the installed state.

7. Room air temperature control device according to one of the preceding claims, wherein the cassette (17) has an electrical connection (83) for the outdoor unit (5) which can be connected to an electrical outdoor unit connection (101) of the outdoor unit (5) so that an electrical connection is formed when the outdoor unit (5) is inserted.

8. Room air temperature control device according to one of the preceding claims, which can be operated independently of an external fluid supply line and an external fluid discharge line.

9. Room air temperature control device according to one of the preceding claims, the electrical supply of which is only via the cassette (17) and / or the outdoor unit (5).

10. Use of a room air temperature control device according to one of the preceding claims in the installed state in a building with an interior space and a building exterior wall (1), wherein the indoor unit (3) is fastened to a wall of the interior space and the cassette (17) is mounted on the building exterior wall (1) and the outdoor unit (5) is inserted into the cassette (17).

11. Use according to claim 10, so that the fresh air opening (43) has a fresh air access through the building outer wall (1).

12. A method for renovating an existing building with an interior space and a building exterior wall (1), in which a room air temperature control device according to one of claims 1 to 9 is installed, the method comprising: - Mounting the cassette (17) on the building's outer wall (1 ), - Fixing the indoor unit (3) to or in a wall of the interior, - Establishing the fluidic connection between the cassette (17) and the indoor unit (3) through the building’s outer wall (1), and - Insert the outdoor unit (5) into the cassette (17).

13. The method according to claim 12, further comprising applying a facade layer, in particular a facade insulation (51) to the building outer wall (1) and mounting the cassette (17) on the building outer wall (1) such that the cassette (17) is embedded in the facade layer.

14. The method according to claim 12 or 13, wherein the cassette (17) is mounted above a window opening (41) such that an insertion opening (19) of the cassette (17) faces the window opening (41).

15. Method according to one of claims 12 to 14, wherein an external power supply is connected to the cassette (17) outside the existing building in order to supply the outdoor unit (5) or to supply both the outdoor unit (5) and the indoor unit (3).

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