Heat storage body and ventilation device with such a heat storage body

Abstract

Heat storage body (7) for selectively absorbing heat from a warm air flow (W) flowing through the heat storage body (7) or releasing heat to a cold air flow (K) flowing through the heat storage body (7), comprising: - a first transfer opening surface (8.1) having a first surface section (F1) with a plurality of inlet openings (10.1) for the warm air flow (W) and a second surface section (F2) with a plurality of outlet openings (11.1) for the cold air flow (K), - a second transfer opening surface (8.2) having a third surface section (F3) with a plurality of inlet openings (10.2) for the cold air flow (K) and a fourth surface section (F4) with a plurality of outlet openings (11.2) for the warm air flow (W), and - several warm air flow channels (9.2) individually connecting the inlet openings (10.1) for the warm air flow (W) with the outlet openings (11.2) for the warm air flow (W), and several cold air flow channels (9.1) individually connecting the inlet openings (10.2) for the cold air flow (K) with the outlet openings (11.1) for the cold air flow (K), wherein - both the plurality of warm air flow channels (9.2) are arranged on parallel curves and extend in a main flow direction (H) from the first transfer opening surface (8.1) to the second transfer opening surface (8.2), and the plurality of cold air flow channels (9.1) are arranged on parallel curves and extend counter to the main flow direction (H) from the second transfer opening surface (8.2) to the first transfer opening surface (8.1), and - the plurality of warm air flow channels (9.2) and the plurality of cold air flow channels (9.1) between the first transfer opening surface (8.1) and the second transfer opening surface (8.2) are designed to run wound around a reference axis (M) running parallel to the main flow direction (H) as an axis of rotation by an angle of rotation (D) around the reference axis (M), characterized in that the first surface section (F1) with the plurality of inlet openings (10.1) for the warm air flow (W) is arranged within a first segment (S1) of the first transfer opening surface (8.1) and the second surface section (F2) with the plurality of outlet openings (11.1) for the cold air flow (K) is arranged within a second segment (S2) of the first transfer opening surface (8.1) supplementing the first segment (S1), wherein the first transfer opening surface (8.1) is a first circular area, the first segment (S1) and the second segment (S2) are formed by circular sectors of the circular first transfer opening area (8.1) and the first segment (S1) and the second segment (S2) complement each other to form the total area of ​​the first transfer opening area (8.1).

Description

[0001] The invention relates to a heat storage body for selectively absorbing heat from a warm air flow flowing through the heat storage body or releasing heat to a cold air flow flowing through the heat storage body.The invention also relates to a ventilation device for ventilating and de-ventilating rooms, comprising a housing with a first flow opening in the flow path facing the interior of a room and a second flow opening in the flow path facing outside the room, as well as at least one first fan with a first electric fan motor, which is designed to generate a ventilation flow flowing into the room by driving a first fan wheel of the first fan in order to ventilate the room, and at least one second fan with a second electric fan motor, which is designed to generate a ventilation flow flowing out of the room by driving a second fan wheel of the second fan in order to ventilate the room, and comprising a heat storage body.

[0002] DE 30 14 754 A1 describes a device for the simultaneous ventilation and exhaust of rooms. It has a housing that can be inserted into a wall, window, or other installation surface in the room. It has one or more fan impellers arranged in the housing with a vertical axis parallel to the installation surface, which draw in supply air and exhaust air and blow it out in opposite directions via separate exhaust chambers in the housing. It also has a heat exchanger arranged in front of the fan impeller or impellers in the intake area of ​​the supply air flow and the exhaust air flow. The exhaust air from inside the room heats the capillary tubes as it passes through. As the circular disc rotates, the capillary tubes, thus heated, reach the other side of the partition wall, where cold supply air is drawn through the capillary tubes. The capillary tubes transfer their heat to the cold supply air, thus warming it.The circular disc thus acts as a heat exchanger between the exhaust air and supply air streams. In a modification of the device, a porous structure in the shape of a circular ring is used instead of capillary tubes. The supply and exhaust air streams are drawn through this porous structure, with the exhaust air heating the porous structure, which then releases the heat back to the subsequently drawn supply air as the circular disc continues to rotate. The heat exchanger effect of the porous structure is thus equivalent to that of the capillary tubes.

[0003] WO 2013 / 041066 A2 describes a cylindrical counterflow recuperative heat exchanger in which the medium inlets are arranged radially on the front-end ring distributor and radially to the longitudinal axis of the recuperative heat exchanger, and connect to the inlet channels for the medium flow arranged between the outer tube and the inner tube. The recuperative heat exchanger has medium outlets arranged axially on the front-end ring distributor and radially to the longitudinal axis of the recuperative heat exchanger, and connect to the outlet channels for the medium flow. The heat exchanger surfaces are separated from one another, coaxial, multi-threaded, helically wound, located between the outer tube and the inner tube, and define the separate inlet and outlet channels for the medium flow.

[0004] US 2018 / 0 283 795 A1 describes a tubular heat exchanger. This comprises a plurality of helical tubes extending around a primary diameter and spaced apart from one another to form gaps. The plurality of helical tubes have an increased surface area compared to a single heat transfer tube with the same primary diameter, resulting in improved heat transfer efficiency or a smaller footprint.

[0005] The object of the invention is to provide a heat storage body and a ventilation device with such a heat storage body, which are constructed as simply as possible and can be used with high operational reliability.

[0006] The object is achieved by a heat storage body for selectively absorbing heat from a warm air flow flowing through the heat storage body or releasing heat to a cold air flow flowing through the heat storage body, comprising: - a first transfer opening surface having a first surface section with a plurality of inlet openings for the warm air flow and a second surface section with a plurality of outlet openings for the cold air flow, - a second transfer opening surface having a third surface section with a plurality of inlet openings for the cold air flow and a fourth surface section with a plurality of outlet openings for the warm air flow, and - a plurality of warm air flow channels, each individually connecting the inlet openings for the warm air flow with the outlet openings for the warm air flow, and a plurality of cold air flow channels, each individually connecting the inlet openings for the cold air flow with the outlet openings for the cold air flow, wherein - both the plurality of warm air flow channels are arranged on parallel curves and extend in a main flow direction from the first transfer opening surface to the second transfer opening surface, and the plurality of cold air flow channels are arranged on parallel curves and extend counter to the main flow direction from the second transfer opening surface to the first transfer opening surface, and - the plurality of warm air flow channels and the plurality of cold air flow channels between the first transfer opening surface and the second transfer opening surface are designed to run around a reference axis running parallel to the main flow direction as a rotational axis, winding around an angle of rotation around the reference axis, wherein the first surface section with the plurality of inlet openings for the warm air flow is arranged within a first segment of the first transfer opening surface, and the second surface section with the plurality of outlet openings for the cold air flow is arranged within a second segment of the first transfer opening surface that complements the first segment, wherein the first transfer opening surface is a first circular surface,the first segment and the second segment are formed by circular sectors of the circular first transfer opening surface and the first segment and the second segment complement each other to form the total area of ​​the first transfer opening surface.

[0007] The heat storage body can, in particular, be a component of a ventilation device for ventilating and de-aerating rooms. Such a ventilation device with a heat storage body according to the invention can, for example, be installed in a wall box in a wall of a building. The heat storage body serves to absorb thermal energy from a warm air flow to be conveyed out of the building and to transfer it to a cold air flow to be conveyed into the building from the building's surroundings. In this respect, the heat storage body is designed to cool orTo extract heat energy so that it is not lost before it completely leaves the building, to temporarily store the heat energy extracted from the warm air flow in the heat storage element, and to preheat the stored heat energy at a later time to the cold air flow entering the building from the environment before it is released into a room in the building. The heat storage element thus serves to recover heat or save energy, i.e., to improve the building's energy balance. The heat storage element can thus be a component of a regenerator.

[0008] In air conditioning technology, a warm air flow is generally understood to be the air flow that is transported out of the building, i.e. the exhaust air, and a cold air flow is understood to be the air flow that is transported into the building, i.e. the fresh air. It can generally be assumed that the rooms in the building are heated and that the room temperatures in the building are therefore generally higher than in the surrounding area, i.e. outside the building. In the special case of ventilation of a cold room, however, this can be functionally reversed, so that a warm air flow is understood to be the air flow that is transported into the cold room, and a cold air flow is understood to be the air flow that is transported out of the cold room.

[0009] The heat storage body is accordingly to be placed in a flow path of the warm air flow and the cold air flow. Accordingly, there is a first transition of the air flows at a first interface of the heat storage body and a second transition of the air flows at a second interface of the heat storage body opposite the first interface. The first interface forms the first transition opening surface of the heat storage body, and the second interface forms the second transition opening surface of the heat storage body. The first transition opening surface comprises a first surface section with a plurality of inlet openings for the warm air flow to be cooled in the heat storage body and a second surface section with a plurality of outlet openings for the cold air flow already preheated in the heat storage body.The second transfer opening surface comprises a third surface section with multiple inlet openings for the cold air flow to be heated in the heat storage body, and a fourth surface section with multiple outlet openings for the warm air flow already cooled in the heat storage body. The heat storage body is thus designed as a counterflow heat exchanger. In the case of a ventilation device, for example, for living spaces in residential buildings, the heat storage body of the ventilation device would be oriented such that the first transfer opening surface faces the interior of the building or room and the second transfer opening surface faces the exterior of the building or room.

[0010] The cold air flow to be heated flows within the heat storage body in several cold air flow channels, and the warm air flow to be cooled flows within the heat storage body in several warm air flow channels. Each cold air flow channel therefore has an inlet and an outlet, and each warm air flow channel has an inlet and an outlet. The respective cold air flow channels and warm air flow channels can generally have any cross-sectional shape. However, from a fluid dynamics perspective, circular cross-sections are particularly advantageous. The cold air flow channels and warm air flow channels can therefore have circular cross-sections. The cold air flow channels and warm air flow channels can, in particular, have equal cross-sectional areas. The geometries or cross-sections of the cold air flow channels and warm air flow channels orBundles of cold air flow channels and warm air flow channels do not necessarily have to have a constant flow pattern. Rather, they can also exhibit widenings, narrowings, and / or other changes.

[0011] The main flow direction is determined by the distance between the first transfer opening surface of the heat storage body and the second transfer opening surface of the heat storage body. By arranging the warm air flow channels and the cold air flow channels along parallel curves, they can be arranged next to each other in a bundle-like manner and aligned in the same way. The warm air flow channels and the cold air flow channels are therefore preferably always equally spaced from each other along their entire length.

[0012] By designing the multiple warm air flow channels and the multiple cold air flow channels between the first transfer opening surface and the second transfer opening surface so as to extend around a reference axis running parallel to the main flow direction as a rotational axis at an angle of rotation around the reference axis, the warm air flow flowing within a countercurrent flow channel in which the heat storage body is arranged can change its flow plane, and the flowing cold air flow can also change its flow plane. In particular, the warm air flow and the cold air flow can each change their flow planes by means of the heat storage body according to the invention, i.e., the warm air flow and the cold air flow exchange their flow planes while flowing through the heat storage body.

[0013] The reference axis can be an axis of symmetry of a basic geometric body, such as a cuboid, a general cylinder, or a circular cylinder, which corresponds to the basic geometric shape of the heat storage body and is similar or close to it. In the case of a heat storage body with the basic shape of a circular cylinder, the reference axis can be formed, for example, by the cylinder axis. In the case of a heat storage body with the basic shape of a cuboid, the reference axis can be a central axis that runs through the center of gravity of the cross-sectional area or through the center of the cross-sectional area of ​​the cuboid. The respective reference axis is aligned at least essentially parallel to the main flow direction. Depending on the basic shape of the heat storage body, the reference axis can also have a position deviating from the center or the cross-sectional center.

[0014] The heat storage body can be used in a oscillating operation in which either the warm air flow, in particular the exhaust air flow, flows through the heat storage body or the cold air flow, in particular the fresh air flow, flows through the heat storage body alternately, i.e. alternately. For flow through the heat storage body in oscillating operation, a single (push-pull) fan can be used which conveys the cold and warm air flows alternately in one direction or the other through the heat storage body. However, with the heat storage body according to the invention it is also possible for the warm air flow, in particular the exhaust air flow, and the cold air flow, in particular the fresh air flow, to flow through the heat storage body simultaneously using the countercurrent principle. For example, a driven rotation of the entire heat storage body which is necessary in known regenerators, in particular in known rotary heat exchangers, can be omitted.

[0015] The multiple warm air flow channels can be arranged directly adjacent to one another, thus forming a compact first bundle of warm air flow channels. Similarly, the multiple cold air flow channels can be arranged directly adjacent to one another, thus forming a compact second bundle of cold air flow channels. The first bundle of warm air flow channels is then arranged parallel to the second bundle of cold air flow channels.

[0016] Alternatively, it may be provided that the plurality of warm air flow channels and the plurality of cold air flow channels are each arranged individually and alternately next to one another, i.e., the warm air flow channels and the cold air flow channels are arranged alternately in a grid or checkerboard pattern. However, this requires a corresponding flow distributor on the first transfer opening surface of the heat storage body and on the second transfer opening surface of the heat storage body. These flow distributors can, for example, each have two fluidically separated collecting chambers into which exclusively the warm air flow channels or exclusively the cold air flow channels flow.

[0017] In a first basic variant, the plurality of warm air flow channels can be formed by a first bundle of a plurality of first pipe pieces and the plurality of cold air flow channels can be formed by a second bundle of a plurality of second pipe pieces, wherein the plurality of first pipe pieces bundled together with the plurality of second pipe pieces form the heat storage body.

[0018] In terms of production technology, a number of first pipe sections can be cut to length accordingly, placed lengthwise against one another in bundles with their outer surfaces, and then twisted, i.e. bent, by the desired angle of rotation. This means that the corresponding first bundle is twisted or turned by the angle of rotation. If necessary, the individual first pipe sections can also be twisted, i.e. bent, as required to match the desired angle of rotation, and only then combined to form the first bundle. The several first pipe sections can be joined together in a heat-conducting manner, for example by welding, soldering, or gluing. In the same way, the several second pipe sections can be cut to length accordingly, placed lengthwise against one another in bundles with their outer surfaces, and then twisted, i.e. bent, by the desired angle of rotation.This means that the corresponding second bundle is twisted or twisted by the desired angle of rotation. If necessary, the individual second pipe sections can also be twisted, i.e., bent, as required to achieve the desired angle of rotation and only then combined to form the second bundle. The multiple second pipe sections can also be joined together in a heat-conducting manner by welding, soldering, or gluing.

[0019] The first pipe sections and the second pipe sections can also be bundled together and twisted, i.e. bent, together by the desired angle of rotation.

[0020] The plurality of first pipe pieces and / or the plurality of second pipe pieces may be formed from copper pipes, steel pipes, galvanized steel pipes or aluminum pipes.

[0021] The multiple copper pipes, steel pipes, galvanized steel pipes or aluminum pipes can be connected to each other in a heat-conducting manner by welding, soldering or gluing.

[0022] In a second basic variant, the plurality of warm air flow channels can be formed by a plurality of first hollow channels in an extruded body, in particular an extruded body or injection-molded body, and the plurality of cold air flow channels can be formed by a plurality of second hollow channels in the extruded body, in particular in the extruded body or injection-molded body, wherein the extruded body, in particular the extruded body or injection-molded body, forms the heat storage body.

[0023] The heat storage body in the form of an extruded body can accordingly be produced by a primary forming process or a forming process, in particular by pressure forming according to DIN 8582 or by extrusion according to DIN 8583. During the pressing process, the desired winding of the warm air flow channels and cold air flow channels can be introduced by the required angle of rotation by rotating the pressing tool or the die and / or the emerging blank.

[0024] The heat storage body in the form of an injection-molded body can also be manufactured by an injection molding process or a transfer molding process.

[0025] The extruded or injection-molded body can be made of copper, aluminum, ceramic, plastic, and / or a phase-change material. The extruded body can also be manufactured using a 3D printing process.

[0026] In the extruded body, in particular the extruded body or injection-molded body, the warm air flow channels and cold air flow channels are formed by tubular or capillary-like recesses in a monoblock body of the heat storage body.

[0027] According to the invention, the first surface section with the plurality of inlet openings for the warm air flow is arranged within a first segment of the first transfer opening surface and the second surface section with the plurality of outlet openings for the cold air flow is arranged within a second segment of the first transfer opening surface that complements the first segment.

[0028] The first segment and the second segment can be formed by equally sized partial areas of the first transfer opening area. The first segment can, in principle, have any desired surface contour. The second segment can, in principle, also have any desired surface contour. The first segment and the second segment can, in particular, be equally sized surface segments. The first segment and the second segment, in particular, complement each other to form the total area of ​​the first transfer opening area, i.e., the first segment and the second segment together form the total area of ​​the first transfer opening area.

[0029] In both basic variants, the third surface section with the plurality of inlet openings for the cold air flow can also be arranged within a third segment of the second transfer opening surface and the fourth surface section with the plurality of outlet openings for the warm air flow can be arranged within a fourth segment of the second transfer opening surface that complements the third segment.

[0030] The third segment and the fourth segment can be formed by equally sized partial areas of the second transfer opening area. The third segment can, in principle, have any desired surface contour. The fourth segment can, in principle, also have any desired surface contour. The third segment and the fourth segment can, in particular, be equally sized surface segments. The third segment and the fourth segment, in particular, complement each other to form the total area of ​​the second transfer opening area, i.e., the third segment and the fourth segment together form the total area of ​​the second transfer opening area.

[0031] In general, the first transfer opening surface can be a first circular surface, wherein the first segment of the first surface section is a first semicircular segment and the second segment of the second surface section is a second semicircular segment, and / or the second transfer opening surface can be a second circular surface, wherein the third segment of the third surface section is a third semicircular segment and the fourth segment of the fourth surface section is a fourth semicircular segment.

[0032] The first semicircular segment and the second semicircular segment can be half-circular sections of a circular first transfer opening area. However, the first segment and the second segment can also be formed by circular sectors of a circular first transfer opening area. Likewise, the third semicircular segment and the fourth semicircular segment can be half-circular sections of a circular second transfer opening area. However, the third segment and the fourth segment can also be formed by circular sectors of a circular second transfer opening area.

[0033] The plurality of warm air flow channels and the plurality of cold air flow channels may be formed to extend spirally through a rotation angle of 180 degrees between the first transfer opening surface and the second transfer opening surface.

[0034] If, for example, the first surface section with the plurality of inlet openings for the warm air flow is arranged in the first transfer opening surface in a lower half of the flow channel, the warm air flow entering the heat storage body in the lower half of the flow channel is redirected in a winding manner into an upper half of the flow channel, so that the warm air flow exits the heat storage body via the fourth surface section with the plurality of outlet openings for the warm air flow in an upper half of the flow channel.

[0035] In an analogous manner, the third surface section with the plurality of inlet openings for the cold air flow is then arranged in the second transfer opening surface in a lower half of the flow channel, so that the cold air flow entering the heat storage body in the lower half of the flow channel is redirected in a winding manner into an upper half of the flow channel, so that the cold air flow exits the heat storage body via the second surface section with the plurality of outlet openings for the cold air flow in an upper half of the flow channel.

[0036] On the other hand, if the first surface section with the plurality of inlet openings for the warm air flow in the first transfer opening surface is arranged in an upper half of the flow channel, the warm air flow entering the heat storage body in the upper half of the flow channel is redirected in a winding manner into a lower half of the flow channel, so that the warm air flow exits the heat storage body via the fourth surface section with the plurality of outlet openings for the warm air flow in a lower half of the flow channel.

[0037] In an analogous manner, the third surface section with the plurality of inlet openings for the cold air flow is then arranged in the second transfer opening surface in an upper half of the flow channel, so that the cold air flow entering the heat storage body in the upper half of the flow channel is redirected in a winding manner into a lower half of the flow channel, so that the cold air flow exits the heat storage body via the second surface section with the plurality of outlet openings for the cold air flow in a lower half of the flow channel.

[0038] In the case of a ventilation device with such a heat storage body, as well as a first electric fan which is designed to generate a ventilation flow flowing into the room and a second electric fan which is designed to generate a ventilation flow flowing out of the room, the two electric fans can both be arranged in the same plane, ie either both in the upper half of the flow channel or both in the lower half of the flow channel.

[0039] The object is accordingly also achieved by a ventilation device for ventilating and de-ventilating rooms, comprising a housing with a first flow opening facing the interior of a room in the flow path and a second flow opening facing the outside of the room in the flow path, as well as at least one first fan with a first electric fan motor, which is designed to generate a ventilation flow flowing into the room by driving a first fan wheel of the first fan in order to ventilate the room, and at least one second fan with a second electric fan motor, which is designed to generate a ventilation flow flowing out of the room by driving a second fan wheel of the second fan in order to de-ventilate the room, and comprising a heat storage body according to one or more of the described embodiments,wherein the first transfer opening surface faces the first through-flow opening facing the interior of the room and the second transfer opening surface faces the second through-flow opening facing the outside of the room, and the first fan is configured to convey the cold air flow through the cold air flow channels of the heat storage body and the second fan is configured to convey the warm air flow through the warm air flow channels of the heat storage body.

[0040] The first fan can preferably be a first radial fan. The second fan can preferably be a second radial fan. However, the first fan and / or the second fan can also be, for example, an axial fan or a diagonal fan.

[0041] The ventilation device can accordingly have a housing with a first flow opening facing the interior of a room in the flow path and a second flow opening facing the outside of the room in the flow path, as well as at least one first radial fan with a first electric fan motor, which is designed to generate a ventilation flow flowing into the room by driving a first radial fan wheel of the first radial fan in order to ventilate the room, and at least one second radial fan with a second electric fan motor, which is designed to generate a ventilation flow flowing out of the room by driving a second radial fan wheel of the second radial fan in order to ventilate the room, wherein the first electric fan motor and the second electric fan motor are controlled by a control device, wherein the control device is designed and configuredIn a first operating mode of the ventilation device, the first electric fan motor is driven to convey a ventilation flow entering the housing at the second through-flow opening and guided by the first radial fan through the first through-flow opening into the room, and in a second operating mode of the ventilation device, the second electric fan motor is driven to convey a ventilation flow entering the housing at the first through-flow opening and guided by the second radial fan through the second through-flow opening out of the room.

[0042] The control device can in particular be designed and configured to drive the first electric fan motor in a first operating mode of the ventilation device in order to convey a ventilation flow entering the housing at the second through-flow opening and guided by the first radial fan through the first through-flow opening into the room, while the second electric fan motor is in an undriven state, and to drive the second electric fan motor in a second operating mode of the ventilation device in order to convey a ventilation flow entering the housing at the first through-flow opening and guided by the second radial fan through the second through-flow opening out of the room, while the first electric fan motor is in an undriven state.

[0043] In order to meet the requirements of energy-efficient use of a ventilation device, the ventilation devices can be combined with devices for heat recovery. In this respect, the ventilation device according to the invention can have the described heat storage body as a device for heat recovery. For example, it may be necessary for the air in the flow path between the first flow opening, which faces the interior of the room, and the second flow opening, which faces outwards, to be heated by the heat storage body in the case of ventilation from outside into the interior of the room before the air is distributed in the room, and to be cooled by the heat storage body in the case of ventilation from inside the room to outside, wherein the heat is retained in the heat storage body, i.e.is temporarily stored so that the air expelled from the room carries as little heat as possible to the outside. This way, as little heat energy as possible is lost from the room. Furthermore, drafts can be avoided if the air flowing into the room is preheated by the heat storage element, so that the incoming air is at least close to the room's interior temperature. This creates a comfortable living environment, as no cold air currents occur.

[0044] Especially when using two fans, a first fan for conveying the warm air flow, i.e., the exhaust air, and a second fan for conveying the cold air flow, i.e., the supply air, two separate flow paths are required. The air flow conveyed by one fan must bypass the other fan. In the prior art, this requires complex installations, such as air baffles or air ducts. By using a heat storage body according to the invention, both air flows, the exhaust air and the supply air, can be redirected within the heat storage body. Consequently, separate redirection devices, such as air baffles, can be omitted.In addition, a winding course of the cold air flow channels within the heat storage body and a winding course of the warm air flow channels within the heat storage body increases the effective flow channel length within the heat storage body, so that the respective air stays longer within the heat storage body in relation to its overall length and thus the heat is transferred better than with straight flow channels.

[0045] Since a redistribution of the cold air flow and the warm air flow takes place due to the winding course of the cold air flow channels and the winding course of the warm air flow channels within the heat storage body, there is no longer any need to mount the heat storage body in a rotating manner, as has previously been necessary in counterflow heat exchangers according to the state of the art.

[0046] Specific embodiments of the invention are explained in more detail in the following description with reference to the accompanying figures. Regardless of the specific context in which they are mentioned, specific features of these exemplary embodiments may represent general features of the invention, even when considered individually or in further combinations.

[0047] They show: Fig. 1 an exemplary embodiment of a ventilation device according to the invention with a heat storage body according to the invention, Fig. 2 a schematic representation of a first variant of an exemplary heat storage body in isolation, which is formed from a bundle of several wound pipe pieces, and Fig. 3 a schematic representation of a second variant of an exemplary heat storage body in isolation, which is formed from a one-piece extruded body or injection-molded body.

[0048] In the Fig. 1 shows an exemplary ventilation device 1.

[0049] The ventilation device 1 serves for ventilating and de-aerating rooms. The ventilation device 1 comprises a housing 2 with a first flow opening 3.1 facing the interior of a room and a second flow opening 3.2 facing the outside of the room.

[0050] The ventilation device 1 comprises at least a first fan 4.1 with a first electric fan motor 5.1, which is designed to generate a ventilation flow B flowing into the room by driving a first fan wheel 6.1 of the first fan 4.1 in order to ventilate the room.

[0051] The ventilation device 1 also comprises at least one second fan 4.2, with a second electric fan motor 5.2, which is designed to generate a ventilation flow E flowing out of the room by driving a second fan wheel 6.2 of the second fan 4.2 in order to ventilate the room.

[0052] A heat storage body 7 is arranged between the first flow opening 3.1 and the second flow opening 3.2.

[0053] The heat storage body 7 is arranged within the housing 2 of the ventilation device 1 such that a first transfer opening surface 8.1 of the heat storage body 7 faces the first flow opening 3.1 facing the interior of the room.

[0054] The second transfer opening surface 8.2 of the heat storage body 7 faces the second flow opening 3.2 facing outside the room.

[0055] The first fan 4.1 is configured to convey a cold air flow K (ventilation flow B) through a plurality of cold air flow channels 9.1 of the heat storage body 7, and the second fan 4.2 is configured to convey a warm air flow W (ventilation flow E) through the warm air flow channels 9.2 of the heat storage body 7.

[0056] The heat storage body 7 serves to selectively absorb heat from a warm air flow W flowing through the heat storage body 7 or to release heat to a cold air flow K flowing through the heat storage body 7.

[0057] The heat storage body 7 has the first transfer opening surface 8.1, which has a first surface section F1 with a plurality of inlet openings 10.1 for the warm air flow W and a second surface section F2 with a plurality of outlet openings 11.1 for the cold air flow K.

[0058] The heat storage body 7 also has the second transfer opening surface 8.2, which has a third surface section F3 with several inlet openings 10.2 for the cold air flow K and a fourth surface section F4 with several outlet openings 11.2 for the warm air flow W.

[0059] The heat storage body 7 accordingly comprises a plurality of warm air flow channels 9.2, each individually connecting the inlet openings 10.1 for the warm air flow W with the outlet openings 11.2 for the warm air flow W, and a plurality of cold air flow channels 9.1, each individually connecting the inlet openings 10.2 for the cold air flow K with the outlet openings 11.1 for the cold air flow K.

[0060] Both the plurality of warm air flow channels 9.2 are arranged at least substantially on parallel curves and extend in a main flow direction H from the first transfer opening surface 8.1 to the second transfer opening surface 8.2, and the plurality of cold air flow channels 9.1 are arranged at least substantially on parallel curves and extend counter to the main flow direction H from the second transfer opening surface 8.2 to the first transfer opening surface 8.1.

[0061] The plurality of warm air flow channels W and the plurality of cold air flow channels K are formed between the first transfer opening surface 8.1 and the second transfer opening surface 8.2, extending as a rotation axis around a reference axis M running parallel to the main flow direction H, winding around the reference axis M at an angle of rotation D. In the case of the illustrated embodiments, the angle of rotation D is 180 degrees.

[0062] In Fig. 1, three cross-sectional views of the heat storage body 7 are shown schematically below the illustrated ventilation device 1. The cross-sectional view shown on the left corresponds to the orientation of the cold air flow channels K and the warm air flow channels W at the second transfer opening surface 8.2. In this orientation, the cold air flow channels 9.1 are arranged in a lower half of the overall cross-section of the heat storage body 7, and the warm air flow channels 9.2 are arranged in an upper half of the overall cross-section of the heat storage body 7.

[0063] The cross-sectional view shown on the right corresponds to the orientation of the cold air flow channels K and the warm air flow channels W on the first transfer opening surface 8.1. In this orientation, the cold air flow channels 9.1 are arranged in the upper half of the overall cross-section of the heat storage body 7 and the warm air flow channels 9.2 are arranged in the lower half of the overall cross-section of the heat storage body 7. The drawn directional normal R, which indicates the rotational orientation of the cross-sectional views, points upwards in the case of the cross-sectional view shown on the right and is twisted by 180 degrees in the case of the cross-sectional view shown on the left, i.e. rotated, so that the drawn directional normal R points downwards in the cross-sectional view shown on the right.The middle cross-sectional view shows the cross-section of the heat storage body 7 as it appears exactly in the middle of the axial length (main flow direction H) of the heat storage body 7. In the case of the middle cross-sectional view, the drawn directional normal R is twisted by 90 degrees, i.e. rotated, so that the drawn directional normal R points to the left in the middle cross-sectional view, i.e. is rotated by 90 degrees compared to the orientation of the directional normal R in the right cross-sectional view.

[0064] In the special embodiment of the Fig. 1, the cold air flow channels K and the warm air flow channels W are shown winding by 180 degrees, starting from the first transfer opening surface 8.1 in the direction of the second transfer opening surface 8.2. In other embodiments, the angle of rotation can be a rotation angle other than 180 degrees. The winding course of the cold air flow channels K and the warm air flow channels W can be designed with a constant gradient. This is not absolutely necessary, however, but is advantageous from a manufacturing perspective. Alternatively, the gradient of the cold air flow channels K and the warm air flow channels W can, if desired, have a course that deviates from a constant course in their winding courses. Thus, the gradient can optionally increase or decrease from the first transfer opening surface 8.1 in the direction of the second transfer opening surface 8.2.Such a course deviating from a constant course can be taken into account especially when manufacturing the heat storage body 7 as an injection-molded body.

[0065] The Fig. 2 shows a basic first variant of a heat storage body 7.

[0066] In this first variant according to Fig. 2, the plurality of warm air flow channels W are formed by a first bundle of a plurality of first pipe sections 12.1 and the plurality of cold air flow channels K are formed by a second bundle of a plurality of second pipe sections 12.2, wherein the plurality of first pipe sections 12.1 together with the plurality of second pipe sections 12.2, as in Fig. 2 schematically shown, bundled to form the heat storage body 7.

[0067] For better illustration, Fig. 2, only a few first pipe sections 12.1 and a few second pipe sections 12.2 are shown in the schematic illustration. This serves to improve the visual representation for the viewer, but should not be understood as the only meaningful concrete number and dimensions of the first pipe sections 12.1 and second pipe sections 12.2. Rather, the first pipe sections 12.1 and second pipe sections 12.2 can be designed with significantly smaller diameters, and the number of first pipe sections 12.1 and second pipe sections 12.2 can also be significantly larger.

[0068] The plurality of first pipe sections 12.1 and / or the plurality of second pipe sections 12.2 can each be formed from copper pipes, steel pipes, galvanized steel pipes, or aluminum pipes. Alternatively, the pipe sections 12.1, 12.2 can be made from a phase change material (PCM) or another thermally conductive material.

[0069] The Fig. 3 shows a basic second variant of a heat storage body 7.

[0070] In this second variant according to Fig. 3, the plurality of warm air flow channels W are formed by a plurality of first hollow channels 13.1 in an extruded body or injection-molded body and the plurality of cold air flow channels K are formed by a plurality of second hollow channels 13.2 in the extruded body or injection-molded body, wherein the extruded body or injection-molded body forms the heat storage body 7.

[0071] For better illustration, the Fig. 3 In the schematic representation, only a few first hollow channels 13.1 and a few second hollow channels 13.2 are shown. This serves to improve the visual representation for the observer, but should not be understood as the only sensible concrete number and dimensions of the first hollow channels 13.1 and second hollow channels 13.2. Rather, the first hollow channels 13.1 and second hollow channels 13.2 can be designed with significantly smaller diameters, and the number of first hollow channels 13.1 and second hollow channels 13.2 can also be significantly larger. The extruded body or injection-molded body can be made of copper, aluminum, ceramic, or plastic, for example.

[0072] Returning to Fig. 1, the first surface section F1 with the plurality of inlet openings 10.1 for the warm air flow W can be arranged within a first segment S1 of the first transfer opening surface 8.1 and the second surface section F2 with the plurality of outlet openings 11.1 for the cold air flow K can be arranged within a second segment S2 of the first transfer opening surface 8.1 supplementing the first segment S1.

[0073] The third surface section F3 can be arranged with the plurality of inlet openings 10.2 for the cold air flow K within a third segment S3 of the second transfer opening surface 8.2 and the fourth surface section F4 with the plurality of outlet openings 11.2 for the warm air flow W can be arranged within a fourth segment S4 of the second transfer opening surface 8.2 supplementing the third segment S3.

[0074] The first transfer opening surface 8.1 is in the case of the present embodiment a first circular surface, wherein the first segment S1 of the first surface section F1 is a first semicircular segment and the second segment S2 of the second surface section F2 is a second semicircular segment, and the second transfer opening surface 8.2 is a second circular surface, wherein the third segment S3 of the third surface section F3 is a third semicircular segment and the fourth segment S4 of the fourth surface section F4 is a fourth semicircular segment, as shown in Fig. 1 is shown.

[0075] The several warm air flow channels 9.2 and the several cold air flow channels 9.1 are between the first transfer opening surface 8.1 and the second transfer opening surface 8.2 in the case of the embodiment of the Fig. 1 is designed to be wound around an angle of rotation of 180 degrees.

Claims

[1] Heat storage body (7) for selectively absorbing heat from a warm air flow (W) flowing through the heat storage body (7) or releasing heat to a cold air flow (K) flowing through the heat storage body (7), comprising: - a first transfer opening surface (8.1) having a first surface section (F1) with a plurality of inlet openings (10.1) for the warm air flow (W) and a second surface section (F2) with a plurality of outlet openings (11.1) for the cold air flow (K), - a second transfer opening surface (8.2) having a third surface section (F3) with a plurality of inlet openings (10.2) for the cold air flow (K) and a fourth surface section (F4) with a plurality of outlet openings (11.2) for the warm air flow (W), and - several warm air flow channels (9.2) individually connecting the inlet openings (10.1) for the warm air flow (W) with the outlet openings (11.2) for the warm air flow (W), and several cold air flow channels (9.1) individually connecting the inlet openings (10.2) for the cold air flow (K) with the outlet openings (11.1) for the cold air flow (K), wherein - both the plurality of warm air flow channels (9.2) are arranged on parallel curves and extend in a main flow direction (H) from the first transfer opening surface (8.1) to the second transfer opening surface (8.2), and the plurality of cold air flow channels (9.1) are arranged on parallel curves and extend counter to the main flow direction (H) from the second transfer opening surface (8.2) to the first transfer opening surface (8.1), and - the plurality of warm air flow channels (9.2) and the plurality of cold air flow channels (9.1) between the first transfer opening surface (8.1) and the second transfer opening surface (8.2) are designed to run wound around a reference axis (M) running parallel to the main flow direction (H) as a rotation axis by an angle of rotation (D) around the reference axis (M), characterized byin that the first surface section (F1) with the plurality of inlet openings (10.1) for the warm air flow (W) is arranged within a first segment (S1) of the first transfer opening surface (8.1) and the second surface section (F2) with the plurality of outlet openings (11.1) for the cold air flow (K) is arranged within a second segment (S2) of the first transfer opening surface (8.1) which supplements the first segment (S1), wherein the first transfer opening surface (8.1) is a first circular surface, the first segment (S1) and the second segment (S2) are formed by circular sectors of the circular first transfer opening surface (8.1), and the first segment (S1) and the second segment (S2) complement each other to form the total surface of the first transfer opening surface (8.1). [2] Heat storage body (7) according to claim 1, characterized byin that the plurality of warm air flow channels (9.2) are formed by a first bundle of a plurality of first pipe sections (12.1) and the plurality of cold air flow channels (9.1) are formed by a second bundle of a plurality of second pipe sections (12.2), wherein the plurality of first pipe sections (12.1) together with the plurality of second pipe sections (12.2) form the heat storage body (7). [3] Heat storage body (7) according to claim 2, characterized by that the plurality of first pipe sections (12.1) and / or the plurality of second pipe sections (12.2) are formed from copper pipes, steel pipes, galvanized steel pipes, aluminum pipes or a phase change material (PCM). [4] Heat storage body (7) according to claim 1, characterized bythat the plurality of warm air flow channels (9.2) are formed by a plurality of first hollow channels (13.1) in an extruded body, in particular an extruded body or injection-molded body, and the plurality of cold air flow channels (9.1) are formed by a plurality of second hollow channels (13.2) in the extruded body, in particular the extruded body or injection-molded body, wherein the extruded body, in particular the extruded body or injection-molded body, forms the heat storage body (7). [5] Heat storage body (7) according to claim 4, characterized by that the extruded body, in particular the extruded body or injection-molded body, is made of copper, aluminum, ceramic, plastic and / or a phase change material (PCM). [6] Heat storage body (7) according to claim 4, characterized by that the extruded body is manufactured using a 3D printing process. [7] Heat storage body (7) according to one of claims 1 to 6, characterized bythat the third surface section (F3) with the plurality of inlet openings (10.2) for the cold air flow (K) is arranged within a third segment (S3) of the second transfer opening surface (8.2) and the fourth surface section (F4) with the plurality of outlet openings (11.2) for the warm air flow (W) is arranged within a fourth segment (S4) of the second transfer opening surface (8.2) supplementing the third segment (S3). [8] Heat storage body (7) according to one of claims 1 to 7, characterized by that the first segment (S1) of the first surface section (F1) is a first semicircular segment and the second segment (S2) of the second surface section (F2) is a second semicircular segment, and / or the second transfer opening surface (8.2) is a second circular surface, wherein the third segment (S3) of the third surface section (F3) is a third semicircular segment and the fourth segment (S4) of the fourth surface section (F4) is a fourth semicircular segment. [9] Heat storage body (7) according to one of claims 1 to 8, characterized by that the plurality of warm air flow channels (9.2) and the plurality of cold air flow channels (9.1) are formed so as to run in a spiral manner through a rotation angle of 180 degrees between the first transfer opening surface (8.1) and the second transfer opening surface (8.2). [10] Ventilation device (1) for ventilating and de-ventilating rooms, comprising a housing (2) with a first flow opening (3.1) facing the interior of a room in the flow path and a second flow opening (3.2) facing the outside of the room in the flow path, as well as at least one first fan (4.1) with a first electric fan motor (5.1), which is designed to generate a ventilation flow (B) flowing into the room by driving a first fan wheel (6.1) of the first fan (4.1) in order to ventilate the room, and at least one second fan (4.2) with a second electric fan motor (5.2), which is designed to generate a ventilation flow (E) flowing out of the room by driving a second fan wheel (6.2) of the second fan (4.2) in order to ventilate the room, and comprising a heat storage body (7) according to one of claims 1 to 9, wherein the first Transfer opening area (8.1) faces the first through-flow opening (3.1) facing the interior of the room and the second transfer opening surface (8.2) faces the second through-flow opening (3.2) facing outside the room, and the first fan (4.1) is designed to convey the cold air flow (K) through the cold air flow channels (9.1) of the heat storage body (7) and the second fan (4.2) is designed to convey the warm air flow (W) through the warm air flow channels (9.2) of the heat storage body (7).

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