Ventilation system for buildings

Description

[0001] The present invention relates to a device for the ventilation of buildings. In new buildings and / or after a renovation, ventilation systems are frequently used to enable air exchange, prevent moisture and mold growth, and / or ventilate interior spaces without, for example, having to open windows.

[0002] The problem that arises is the heat loss in winter and the heating in summer due to outside heat.

[0003] Therefore, ventilation units with heat recovery are frequently used. State of the art

[0004] WO 2016 / 034561A1 describes a latent heat storage system for encapsulating phase change materials (PCMs) and the manufacture of containers for this purpose. In addition to the cylindrical shape, a tubular container is also described. The filling volume is specified as up to 500 ml, the wall thickness as 90 to 300 µm, and the preferred temperature stability as 600°C.

[0005] DE 20 2005 015 393 U1 describes a plate-shaped metal coating of PCM in which two overlapping sheets are connected or folded around each other at the edges.

[0006] German patent DE 102018000673 describes the design of central or decentralized PCM ventilation systems with latent heat storage, in which a composite body made of organic phase change material (PCM-V) is encapsulated in a metal housing. Specific properties must be met, consisting of requirements for the PCM-V used and for the encapsulation of the PCM-V. The metallic encapsulation of the housing must meet the requirements for the thermal insulation of the encapsulated phase change material (PCM) as well as the criteria for reducing the flammability, flame spread, temperature development, flue gas density, and combustion droplets of the PCM-V.

[0007] DE 202022100099 describes a ventilation system for a building , wherein the ventilation device has a ventilation duct which connects a first and a second ventilation opening of the ventilation device, wherein the ventilation duct has a number of sections which are successively traversed by an airflow flowing through the ventilation duct, wherein the sections each have a heat storage element which is thermally coupled to the respective section of the ventilation duct through which the airflow flows, and wherein in at least one of the sections the heat storage element is designed as a combination of a respective phase conversion material and a respective heat exchanger, wherein the respective heat exchanger encloses the respective phase conversion material and wherein the respective phase conversion material changes its phase state at a respective conversion temperature.

[0008] In this case, the heat exchanger encloses the phase change material; therefore, cavities are needed to accommodate its expansion.

[0009] to incorporate phase change material. Furthermore, the PCM is only in contact with the heat exchanger on its outer surface, which limits the exchange area.

[0010] None of the devices described so far enable rapid and constant heat absorption and heat transfer to the air flowing through the device.

[0011] A ventilation device is proposed that solves these problems.

[0012] The ventilation device consists of a housing, which is preferably tubular. The ventilation device is designed to be installed in a building wall and penetrates the wall and the housing with an opening on each side of the wall.Inside the housing are at least one hollow body and a series of channels arranged to guide air surrounded by the hollow body(s), the housing advantageously forming a wall of the hollow body(s), the channels having at least a partially thermally conductive wall between the two openings, and the channels being at least partially surrounded by a PCM (phase change material) contained within the hollow body, and the at least part of the housing being made of a deformable plastic material capable of accommodating the volume change of the PCM (phase change material), and the housing being at least partially surrounded by a plastic foam material capable of accommodating the volume change of the housing.Advantageously, the ventilation device includes a controllable fan to generate an air exchange flow through the ducts and / or two fans to generate an air exchange flow through the ducts.

[0013] The alternating current is determined by the heat absorption capacity of the PCM in thermal contact with the air through the channels.

[0014] According to the invention, the ventilation device consists of two covers which, together with the housing, form a hollow body in which the channels are arranged.

[0015] Further purposes, features, advantages, and applications will become apparent from the following description of an exemplary embodiment and the accompanying drawings. Accordingly, all features described and / or illustrated in the figures, whether considered individually or in any combination, constitute the subject matter disclosed herein, regardless of their grouping in the claims or their dependencies. In the drawing: Figure 1a shows a section through a lid for a ventilation device according to the invention, Figure 1b shows a front view of a cover for a ventilation device according to the invention, Figure 1c shows an magnification of Figure 1a , and Figure 2 shows a ventilation device according to the invention.

[0016] In Figure 2A ventilation device designated with the reference number 100 is installed in a building wall, preferably an exterior wall of a building. This device 100 enables air exchange between the interior of a building and the exterior of the building.

[0017] The ventilation device 100 has two covers 101, on which a series of ports 102 are arranged. The ports 102 of the first cover 101 are connected to the ports 102 of the second cover 101 by channels 108, which have a wall that is at least partially thermally conductive. The covers 101 enclose a housing 109, which preferably has a cylindrical tube shape into which the channels 108 are inserted. The covers 101 and the housing form a hollow body. The space between the channels within the hollow body formed by the covers 101 and the housing is filled with PCM (phase change material) via the inlets 105 in the cover(s) 101.

[0018] The casing 109 is deformable and thus allows for the accommodation of volume changes in the PCM. The casing / housing 109 is preferably at least partially encased by a foam 111, which keeps the space between the casing 109 and the wall closed in order to prevent air leakage that would cause problems with the thermal insulation of the building.

[0019] Advantageously, a fan 112 is arranged on a cover on one side of the ducts 108 and in front of the inlets of the ducts 108, forcing an airflow from the outside of the building to the inside and vice versa. The purpose of the PCM is to keep the temperature inside the building constant by preventing heat loss from the inside to the outside in winter and heat gain in summer.

[0020] In one embodiment, a fan 112 is arranged on each side of the duct cover 101. Alternatively or additionally, the fan(s) 112 can be controlled to change the direction of the airflow.

[0021] The channels 108 arranged in the body formed by the housing 109 and the covers 101 are preferably made of aluminum or copper. The covers 101 advantageously have inlets 105 so that, after the formation of the hollow body(s) by the housing 109 and the covers 101 and the positioning of the channels 108, the PCM phase-change material is introduced, filling the space and contacting the channels 108. According to the invention, the channels 108 are connected to covers via terminals 102, which are arranged on the covers 101 inside the hollow body.

[0022] The ventilation device 100 is then inserted into a through-opening in a building wall. Advantageously, the housing 109 is at least partially surrounded by a foam 111, preferably vulcanized foam, which accommodates the expansion and return of the housing 109 to its initial position due to the volume change of the phase change material PCM 110. The foam material ensures that no cracks form through which air can penetrate or that the housing is damaged when it is pressed against the building wall.

[0023] Finally, it is clear that additions, modifications or variants that are obvious to the person skilled in the art can be made to the building ventilation device according to the invention without thereby leaving the scope of protection of the attached claims. List of reference figures

[0024] 100 Ventilation device 101 Cover 102 Connection 105 Inlet 108 Piping / Channels 109 Housing 110 PCM 111 Foam 112 Fan

Claims

1. A ventilation device (100) comprising a housing (109), wherein the ventilation device is adapted to be inserted into an opening passing through the wall of a building, and wherein the housing (109) has an opening on each side of the wall and the housing (109) forms at least one hollow body, and a series of channels (108) are arranged within the hollow body, which are suitable for conducting air, and wherein the housing (109) forms a wall of the hollow body or the hollow bodies, characterised in that the hollow body is formed by the housing and two covers (101) which close the two openings of the housing (109), and that the channels comprise an at least partially thermally conductive wall between the two openings, and the channels (108) are at least partially surrounded by a PCM material (phase change material) housed within the hollow body, and wherein the housing (109) is formed at least partially from a deformable plastic material which enables the volume change of the PCM (phase change material) to be absorbed, and the covers have attachments (102) or connections (102) inside the hollow body to which the channels (108) are attached.

2. Ventilation device (100) according to claim 1, characterised in that the housing (109) is at least partially surrounded by a foam material (111) capable of accommodating the volume change of the housing (109).

3. Ventilation device (100) according to claim 1 or 2, characterised in that the housing (109) forms at least one wall of the hollow body.

4. Ventilation device (100) according to one of the preceding claims, characterised in that the lids (101) have inlets (105) for introducing the PCM into the hollow body.

5. Ventilation device (100) according to one of the preceding claims, characterised in that a fan is arranged at the inlets of the channels, which forces an air flow through the channels.

6. Ventilation device (100) according to one of the preceding claims, characterised in that the channels (108) are made of aluminium or copper.

7. Ventilation device (100) according to one of claims 2 to 5, characterised in that the foam (111) is vulcanised.