Ventilation device

Abstract

The invention relates to a ventilation device, comprising a rotatably mounted ventilator (1) with a first and a second blade row (1.1, 1.2), a first air feed (2.1) which is fluidically connected to the first blade row (1.1), a second air feed (2.2) which is fluidically connected to the second blade row (1.2), a first air discharge (3.1) which is fluidically connected to the first blade row (1.1), and a second air discharge (3.2) which is fluidically connected to the second blade row (1.2). According to the invention, first flow channels (4.1) of a cross-flow heat exchanger (4) are designed to be connected to the first air discharge (3.1) of the first blade row (1.1), and second flow channels (4.2) of the cross-flow heat exchanger (4) are designed to be connected to the second air feed (2.2) of the second blade row (1.2).

Description

[0001] Ventilation device

[0002] The invention relates to a ventilation device according to the preamble of claim 1.

[0003] A ventilation device of the type mentioned at the outset is known from patent document CN 2436701 Y. This ventilation device consists of a rotatably mounted fan with 10 a first and a second row of blades, a first air supply which is in air-conducting connection with the first row of blades and a second air supply which is in air-conducting connection with the second row of blades, and a first air discharge which is in air-conducting connection with the first row of blades and a second air discharge which is in air-conducting connection with the second row of blades.

[0004] The invention is based on the object of improving a ventilation device of the type mentioned above. In particular, a more energy-efficient ventilation device is to be created.

[0005] This object is achieved with a ventilation device of the type mentioned at the outset by the features listed in the characterising part of patent claim 1 25 .

[0006] According to the invention, it is therefore provided that first flow channels of a cross-flow heat exchanger are designed to be connected to the first air discharge of the first row of blades and second flow channels 30 of the cross-flow heat exchanger are designed to be connected to the second air supply of the second row of blades.

[0007] In other words, the solution according to the invention is characterized in that, on the one hand, the first air discharge, which is preferably provided circumferentially on the fan, is connected in an air-conducting manner to first flow channels beginning on a first side of the cross-flow heat exchanger, and, on the other hand, the second air supply, which is also preferably provided circumferentially on the fan, is connected in an air-conducting manner to second flow channels beginning on a second side of the cross-flow heat exchanger.

[0008] The term "air-conducting" used several times above expresses that the connections between the blade rows and air guides are intended to conduct air.

[0009] Furthermore, it is pointed out that the term "cross-flow heat exchanger" used in this document 20 always also includes a so-called "cross-counterflow heat exchanger", which otherwise only differ from each other in their flow direction.

[0010] Other advantageous developments arise from the dependent patent claims.

[0011] The ventilation device according to the invention, including its advantageous developments according to the dependent claims, is explained in more detail below with reference to the drawing 30 of a preferred embodiment. It shows

[0012] Figure 1 shows a section through the ventilation device according to the invention;

[0013] Figure 2 shows a 3D section of the ventilation device according to Figure 5 1;

[0014] Figure 3 shows in perspective the ventilation device according to Figure 1 from the outside;

[0015] Figure 4 shows, as a 3D section from a first direction, the assembly comprising air supply and air discharge for the ventilation device according to Figure 1;

[0016] Figure 5 shows, as a 3D section from a second direction, the assembly of air supply and air discharge for the ventilation device according to Figure 1;

[0017] Figure 6 shows a perspective rear view of the assembly according to Figures 4 and 5;

[0018] Figure 7 shows a perspective front view of the fan for the ventilation device according to Figure 1; and

[0019] Figure 8 as a 3-D section in rear view of the fan according to Figure 7. 20

[0020] The ventilation device shown in the figures consists, in a known manner, of a rotatably mounted fan 1 with a first and a second row of blades 1.1, 1.2, a first air supply 2.1, 2.2 which is in air-conducting connection with the first row of blades 1.1 and a second air supply 2.1, 2.2 which is in air-conducting connection with the second row of blades 1.2, and a first air discharge 3.1, 3.2 which is in air-conducting connection with the first row of blades 1.1 and a second air discharge 3.1, 3.2 which is in air-conducting connection with the second row of blades 1.2. With reference in particular to figures 7 and 8, it is particularly preferably provided that the first row of blades 1.1 is arranged concentrically around the second row of blades 1.2. In order to prevent possible leaks or pneumatic short circuits of the flowing air as far as possible, 5 is particularly preferably provided between the two rows of blades 1.1, 1.2, but preferably also a (so-called) labyrinth seal 1.3 (see https: / / de.wikipedia.org / w / index.php?title=Labyrinthdichtung&oldid=224226270) is provided on the outer circumference of the fan. 10.

[0021] What is essential for the ventilation device according to the invention is that first flow channels 4.1 of a cross-flow heat exchanger 4 are designed to be connected to the first air discharge 3.1 of the first blade row 1.1, and second flow channels 4.2 of the cross-flow heat exchanger 4 are designed to be connected to the second air supply 2.2 of the second blade row 1.2. Where the flow channels 4.1, 4.2 begin and end on the cross-flow heat exchanger, a flow plane 4.3, 4.4 is preferably provided on the cross-flow heat exchanger, wherein it is further preferably provided that these two flow planes 4.3, 4.4 are arranged at an angle of 90 to 180°, preferably 110 to 160°, and most preferably 150°, to one another.

[0022] 25 Looking at it in somewhat more detail, it is preferably provided that the air discharge 3.1, which is connected to the first blade row 1.1 in an air-conducting manner, is designed to be circular with respect to its inflow cross-section on the fan side. 30 In the same way, it is further preferably provided that the air supply 2.2, which is connected to the second, preferably inner blade row 1.2 in an air-conducting manner, is designed to be circular with respect to its outflow cross-section on the fan side, preferably also circular with respect to a possible drive.

[0023] In this case, it is furthermore preferably provided - in accordance with the arrangement of the blade rows 1.1, 1.2 - that the circular inflow cross-section of the air discharge 3.1 of the first blade row 1.1 is designed to concentrically enclose the circular, optionally or in particular circular, outflow cross-section of the air supply 2.2 of the second blade row 1.2.

[0024] 15

[0025] Expressed again in other words, it is thus preferably provided that the air discharge 3.1, which is connected to the first row of blades 1.1 in an air-conducting manner, is designed to concentrically enclose the air supply 2.2, which is connected to the second row of blades 1.2 in an air-conducting manner, on the fan side.

[0026] Furthermore, it is preferably provided that the first and / or second air supply 2.1, 2.2 are / is designed as a duct. On the other hand, it is preferably provided that the first and / or second air discharge 3.1, 3.2 are / is designed as a duct.

[0027] As can be seen particularly well from Figures 5 and 6, it is furthermore particularly preferably provided that the air discharge 3.1, which is in air-conducting connection with the first row of blades 1.1, is semicircular or at least approximately semicircular with respect to its outflow cross-section on the cross-flow heat exchanger side. In the same way, it is further preferably provided that the air supply 2.2, which is in air-conducting connection with the second row of blades 1.2, is (likewise) semicircular or at least approximately semicircular with respect to its inflow cross-section on the cross-flow heat exchanger side.

[0028] Overall, it is further preferably provided that the semicircular outflow cross-section of the air discharge 3 . 1 of the first blade row 1 . 1 and the semicircular inflow cross-section of the air supply 2 . 2 of the second blade row 1 . 2 together form an overall circular or at least approximately circular connection cross-section to the cross-flow heat exchanger 4 . 15

[0029] Viewed again from a different perspective, it is furthermore preferably provided that the air supply 2 . 1 , which is connected to the first row of blades 1 . 1 in an air-conducting manner, is designed to be circular-ring-shaped with respect to its outflow cross-section on the fan side. 20 In the same way, it is furthermore preferably provided that the air discharge 3 . 2 , which is connected to the second row of blades 1 . 2 in an air-conducting manner, is designed to be circular, in particular annular (see above), with respect to its inflow cross-section on the fan side. 25

[0030] To avoid mixing or turbulence of the air supply or air discharge on the fan side, it is further preferably provided (not separately shown) that a distance between the fan 1 and an outlet cross-sectional area of ​​the second air discharge 3.2 is at least 3 cm longer, preferably at least 6 cm longer, very particularly preferably twice as long, than a distance between an inlet cross-sectional area of ​​the first air supply 2.1 and the fan 1. Alternatively, however, it can also be provided (as shown) that an inflow to the first air supply 2.1 on the inlet opening side is radial at least at the beginning, but an outflow from the second air discharge 3.2 on the outlet opening side is axial at least at the end. This ensures that the air flows do not cross, which would obviously be disadvantageous.

[0031] 10

[0032] As can be seen particularly well from Figures 4 and 5, it is furthermore preferably provided that the air supply 2.1, 2.2 and the air discharge 3.1, 3.2 are arranged as an assembly between the fan 1 and the cross-flow heat exchanger 4. 15

[0033] It is particularly preferred that the assembly is optionally made in one piece and / or from plastic.

[0034] 20

[0035] Furthermore, with reference to Figures 2 and 4, it is particularly preferred that the assembly has a space 23 for accommodating a drive motor 10 for the fan 1. This space 23 is preferably located in the center of the second blade row 1.2. 25

[0036] Furthermore, it is particularly preferred that the cross-flow heat exchanger 4 is designed not only for heat transport, but also - as a so-called enthalpy exchanger - for mass transport. 30 As can be concluded in particular from Figure 3, it is furthermore preferably provided that the ventilation device according to the invention is arranged in a wall of a building and is particularly preferably designed as a decentralized ventilation device. 5

[0037] For this purpose, it is finally preferably provided that the ventilation device, in which the cross-flow heat exchanger basically serves for heat recovery, is designed to be provided with an electrical 10 temperature control device (not separately shown) for controlling the temperature of air flowing through it.

[0038] The ventilation device according to the invention is flowed through as follows:

[0039] 15 Fresh outside air reaches the first row of blades 1 . 1 of the fan 1 via the first air supply 2 . 1. From there it flows via the first air discharge 3 . 1, which is preferably circular on the fan side and preferably semicircular on the cross-flow heat exchanger side (see 20 in particular Figure 5), to the flow plane 4 . 4 of the cross-flow heat exchanger 4 and from there into its first flow channels 4 . 1. Having reached the end of these channels, the air is preferably blown into the room to be ventilated (within the building) at an inner panel in a first direction via an outlet opening.

[0040] At the same time, used room air is sucked through the second flow channels 4.2 of the cross-flow heat exchanger 4 via an intake opening preferably arranged in a second, opposite direction on the inner panel. In this, at least heat (and possibly moisture, in the form of water) is transferred from the used room air to the fresh air sucked in. After flowing through the flow plane 4.3, the air first reaches the second air supply 2.2, which is semicircular on the cross-flow heat exchanger side. From there, the room air then flows on to the fan 1, where the second air supply 2.2 is then circular. Once there, the room air then flows through the second row of blades 1.2 of the fan 1 and then reaches the second, preferably also circular air discharge 3.2, from where it is then blown out into the open (outside the building).

[0041] List of reference symbols

[0042] 1 fan

[0043] 1 . 1 first row of blades

[0044] 1.2 second row of blades

[0045] 1 . 3 Labyrinth seal

[0046] 2 . 1 first air supply

[0047] 2 .2 second air supply

[0048] 3 . 1 first air discharge

[0049] 3 .2 second air discharge

[0050] 4 cross-flow heat exchangers

[0051] 4 . 1 first flow channels

[0052] 4 .2 second flow channels

[0053] 4 .3 ​​Flow level

[0054] 4 .4 Flow level

[0055] 10 Drive motor

[0056] 23 Installation space

Claims

Patent claims 1. Ventilation device, comprising a rotatably mounted fan (1) with a first and a second row of blades (1.1, 1.2), a first row of blades connected to the first row of blades (1.1) and a second air supply (2.1, 2.2) which is connected to the second row of blades (1.2) in an air-conducting manner and a first air supply (2.1, 2.2) which is connected to the first row of blades (1.1) in an air-conducting manner and a second air supply (2.1, 2.2) which is connected to the second row of blades (1.2) air-conducting connected air discharge (3.1, 3.2), characterized in that first flow channels (4.1) of a cross-flow heat exchanger (4) are designed to be connected to the first air discharge (3.1) of the first row of blades (1.1) and second flow channels (4.2) of the cross-flow heat exchanger (4) are designed to be connected to the second air supply (2.2) of the second row of blades (1.2).

2. Ventilation device according to claim 1, characterized in that the first air discharge (3.1) connected to the first blade row (1.1) in an air-conducting manner with respect to its inflow cross-section is circular on the fan side. Ventilation device according to claim 1 or 2, characterized in that the second air supply (2.2), which is in air-conducting connection with the second row of blades (1.2), is circular on the fan side with regard to its outflow cross-section. Ventilation device according to claims 2 and 3, characterized in that the circular inflow cross-section of the air discharge (3.1) of the first row of blades (1.1) is designed to concentrically enclose the circular outflow cross-section of the air supply (2.2) of the second row of blades (1.2). Ventilation device according to one of claims 1 to 4, characterized in that the air discharge (3.1), which is in air-conducting connection with the first row of blades (1.1), is semicircular on the cross-heat exchanger side with regard to its outflow cross-section.Ventilation device according to one of claims 1 to 5, characterized in that the air supply (2.2) which is connected to the second row of blades (1.2) in an air-conducting manner is semicircular in terms of its inflow cross-section on the cross-flow heat exchanger side. Ventilation device according to claims 5 and 6, characterized in that the semicircular outflow cross-section of the air discharge (3.1) of the first row of blades (1.1) and the semicircular inflow cross-section of the air supply (2.2) of the second row of blades (1.2) together form an overall circular connection cross-section to the cross-flow heat exchanger (4). Ventilation device according to one of claims 1 to 7, characterized in that the air supply (2.1) which is in air-conducting connection with the first row of blades (1.1) is circular in shape on the fan side with regard to its outflow cross-section. Ventilation device according to one of claims 1 to 8, characterized in that the air discharge (3.2) which is in air-conducting connection with the second row of blades (1.2) is circular in shape on the fan side with regard to its inflow cross-section.Ventilation device according to one of claims 1 to 9, characterized in that the air supply (2.1, 2.2) and the air discharge (3.1, 3.2) are arranged as an assembly between the fan (1) and the cross-flow heat exchanger (4). Ventilation device according to one of claims 1 to 10, characterized in that the assembly is formed in one piece. Ventilation device according to one of claims 1 to 11, characterized in that the cross-flow heat exchanger (4) is designed not only for heat transport, but also for material transport. Ventilation device according to one of claims 1 to 12, characterized in that it is designed with an electrical temperature control device for tempering air flowing through it. Ventilation device according to one of claims 1 to 13, characterized in that it is arranged in a wall of a building. Ventilation device according to one of claims 1 to 14, characterized in that it is designed as a decentralized ventilation unit.

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