DE102011112109A1 - Fan device for e.g. guiding air flow around cross-flow heat exchanger of ventilation system of air conditioning device utilized to cool room, has fan unit movably supported to guide air flow in channels in two positions, respectively - Google Patents

Abstract

The device (1) has a fan unit (4) e.g. radial fan and blower, for producing an air flow. Two channels (2, 3) guide the air flow in flow paths (11, 12), respectively. The fan unit is movably supported to guide the air flow in the channels in two positions, respectively. The fan unit includes a cladding-shaped impeller retainer (6) with a circular outer periphery concentric to a rotational axis (5). The retainer includes an outlet (7) for guiding the air flow into the channels. An actuator unit e.g. step motor and expansion material element, rotates the fan unit around the rotational axis. Independent claims are also included for the following: (1) an air conditioning device for heating, cooling and/or ventilating a room (2) a method for operating a fan device.

Description

The present invention relates to a fan device for generating and guiding an air flow. Furthermore, the present invention relates to an air conditioner for heating, cooling and / or ventilation, and a ventilation means for generating an air flow. In addition, the invention relates to a method for operating a fan device.

Fan devices generally serve to create an airflow and guide it so that, for example, a room can be warmed, cooled, vented or vented. Often, such a fan device has a rotating in a housing impeller. One application for this example, air conditioners with a heat exchanger. In certain operating conditions, especially summer nights, the heat exchanger should not be flowed through. For a so-called (summer) bypass or a bypass line is used, so a separate channel through which the air flow can be passed to the heat exchanger over. Such a bypass can also be referred to as a bypass channel. In order to allow the deflection of the air flow, usually flaps or valves are used, which can release or close the bypass or the channel leading to the heat exchanger as needed. Such a flap is also called a bypass flap.

Such a bypass flap is for example from the document DE 10 2007 041 041 A1 known. The document relates to a system for ventilating and / or heating rooms, in which an air volume flow can be passed by the bypass flap on the heat exchanger.

From the document DE 101 42 779 A1 a compact heater is known, which has a summer bypass for certain operating conditions, can be passed through the fresh air by means of a valve.

document DE 195 08 252 A1 concerns a ventilation system with heat recovery. Such a ventilation system includes a summer bypass, which bypasses a heat exchanger depending on temperature values. In this case, the summer bypass can be switched via a flap which is mounted in an exhaust duct and switches from the heat exchanger to another connected to an exhaust air duct exhaust fan.

Such valves or valves require additional space throughout the system. In addition, the manufacture and installation of such valves or flaps can be expensive. Further problems can occur in terms of maintenance, reliability and susceptibility.

The invention is thus based on the object to remedy or reduce at least one of the above-mentioned problems, in particular, the targeted guiding an air flow of a fan device is improved in a predetermined direction, in particular facilitated. At least an alternative solution should be proposed.

According to the invention, a fan device for generating and guiding an air flow according to claim 1 is proposed. The fan device comprises a fan means for generating the air flow, a first channel for directing the air flow on a first flow path, and a second channel for conducting the air flow on a second flow path. In this case, the fan means or a part thereof is movably mounted to guide the air flow in the first channel in a first position and in a second position, the air flow in the second channel.

The fan means is provided for example as a fan or blower. Such fan devices find z. B. in ventilation systems together with heat exchangers application. Under certain operating conditions, the heat exchanger should not be flown through with the air flow, but the air flow should be routed around the heat exchanger. Due to the fan device according to the invention, the switching function required for diverting space-saving integrated into the fan device. For this purpose, the fan device is designed such that the fan means moves in different positions, in particular can be pivoted.

The fan means preferably comprises an impeller for generating an air flow and a component which is movably arranged in the fan device to direct the generated air flow into different channels. The component is prepared to assume different positions.

Preferably, the fan means is designed as a radial fan. The air is pressed radially over the impeller to the outside. This creates a negative pressure leading to an axial suction of the air. Such a radial fan has a long service life. In addition, the air flow generated is evenly distributed due to the arrangement of its housing.

In a further embodiment, the fan means has an axis of rotation and a jacket-shaped impeller seat with an outer circumference concentric with the axis of rotation, in particular a substantially circular outer circumference, around the fan means in one To store the outer circumference of the jacket-shaped impeller mount adapted mounting frame rotatable about the axis of rotation. In this case, the jacket-shaped impeller receptacle on an outlet opening for directing the air flow in the first and / or second channel. The mounting frame here corresponds to the housing of the fan device and receives the impeller mount so that it is movable relative to the mounting frame, in particular pivotable or rotatable. By moving the fan means thus the impeller seat and thus the outlet opening, or a plurality of outlet openings, is moved, whereby the air flow can be directed into different channels. The impeller receptacle can form the housing of the fan means or be considered as the housing of the fan means.

The outlet opening is formed for example in the form of a recess in the outer periphery of the impeller receiving. Preferably, it has an opening which corresponds approximately to the size of the channels in the area in which the channel tapers to the outer periphery. The outlet opening and the runner seat thereby form, when the exit opening is located immediately in front of the passage, an extension of the passage which is prepared to ensure a substantially trouble-free flow, in particular a flow which is not disturbed by edges or the like.

By rotating the fan means, the outlet opening is positioned on the impeller seat so that the air flow generated by the fan means is selectively directed via the outlet opening, for example, only in the first channel. The second channel is thereby closed by the impeller seat of the fan means so that the air flow is passed only in the first channel. In a further position, the fan means is arranged so that the outlet opening is arranged immediately in front of the second channel and the first channel is closed by the fan means. The air flow is only passed through the second channel. Alternatively, a further outlet opening is provided in the region of the impeller seat, so that in a position of the fan means the first outlet opening directs the air flow into the first channel and the second outlet opening simultaneously directs the air flow into the second channel. In a further position of the fan means, the two outlet openings are arranged so that the air flow is passed through one of the two outlet openings through the first or second channel. The respective other outlet opening is closed by the fan means so that the air flow is not dissipated.

In a preferred embodiment, an actuator means is provided for rotating the fan means about an axis of rotation. In this case, such an actuator means converts signals of a control into mechanical work, by means of which rotation of the fan means is effected. The control in dependence on a predetermined value, such as a temperature value or a humidity in a room, the position of the fan means, so that the air flow is supplied for example to a heat exchanger via a first channel or via a second channel to the heat exchanger is bypassed.

Preferably, the actuator means comprises a gear or stepper motor and / or at least one expansion element, or is designed as a gear or stepper motor and / or expansion element. A stepping motor essentially executes a stepwise and therefore quantitatively clearly defined rotation by one step angle at a time. Depending on the number of steps thus a resulting rotation angle is known exactly. Thereby, the outlet opening can be precisely brought from the first to the second position and take exact intermediate positions.

An expansion element performs a change in temperature through a change in volume, which in turn is converted into a movement. In this case, for example, in the area of the impeller seat there is a stop means fastened there or integrated there, for example in the form of an angle, hook or the like, which is pushed or pushed by the movement of the expansion element. By pushing or abutting the stop means, the position of the outlet opening changes. Alternatively, the fan means, namely in particular its impeller seat is rotated manually.

In a preferred embodiment, the first and the second channel to a first and second air inlet for introducing the air flow. In this case, the first and the second air inlet are arranged adjacent to one another such that air can be introduced from the fan means at the same time depending on the position of the fan means in both air inlets. The air flow is divided so that it is directed into the first and the second channel. In this case, the outlet opening of the fan means is positioned so that it lies in front of both air inlets.

In addition, the invention proposes a fan means for generating an air flow, which is prepared for use in at least one of the above-illustrated fan devices. In this case, such a fan means, for example, a stop means or fastening means to which the actuator means is to be struck or fastened to effect a rotation of the fan means. Such a stop means or fastening means is formed for example as a survey, an angle or a hook against which the expansion element or another actuator presses or pulls it to achieve a movement of the fan means in a different position, so that the outlet opening of the outer periphery of the impeller seat is located in front of the first and / or second channel.

In addition, the invention proposes an air conditioning unit for heating, cooling and / or ventilating, which has at least one fan device for generating and guiding an air flow according to the above embodiments and at least one heat exchanger for transferring heat energy from a first medium to a second medium. In this case, the first channel for guiding the air flow through the heat exchanger and the second channel is prepared for passing the air flow past the heat exchanger.

The advantage here is that, for example, in summer, the cool night air can be used to cool a room. In this case, the cool outside air flow is not passed through the first channel through the heat exchanger, but passed through the second channel to the heat exchanger. Thus, a warming of the supply air is avoided. With very cold outside temperatures, such as, for example, minus degrees and simultaneously high air humidity, there is the danger that the air in the heat exchanger freezes. To avoid this, exhaust air is not supplied from a room via a first channel to the heat exchanger, but over a second channel to the heat exchanger over. In this case, the warm outside air is supplied to the cold outside air stream, before it is passed into the heat exchanger. By using a fan device according to at least one of the above representations, a reliable and at the same time efficient changing of the air flows is to be created.

Preferably, the air conditioner includes a controller for adjusting a position of the fan means. Adjusting the position directs the airflow into either the first and / or second channel. For example, if the air conditioner is located in a room, then the room temperature and / or the humidity in the room are kept constant in the room by the control, for example.

In a preferred embodiment, the controller, depending on a measured temperature and / or humidity, positions the fan means to direct the airflow past the heat exchanger and / or past the heat exchanger. As a result, a room air in a predetermined temperature range preferably from 19 ° C to 27 ° C, in particular 22 ° C, and a predetermined humidity of 20 to 70%, in particular 50%, can be achieved.

Preferably, the heat exchanger is designed as a cross-heat exchanger. Such a cross-heat exchanger is used, for example, for heat recovery application, ie for catching released thermal energy and the diversion thereof. The efficiency of such recovery by a cross-flow heat exchanger reaches, for example, up to 90%.

• – Erzeugen eines Luftstroms,
• – Auswählen eines Strömungspfades, auf den der Luftstrom geleitet werden soll, und
• – Leiten des Luftstroms auf den ausgewählten Strömungspfad,

indem das Lüftermittel in eine entsprechende Position bewegt, insbesondere gedreht wird.In addition, a method for operating a fan device according to the invention is proposed according to the invention. Preferably, such a method comprises the following steps:

• Generating an air stream,
• Selecting a flow path to which the air flow is to be directed, and
• Directing the air flow to the selected flow path,

by the fan means moves in a corresponding position, in particular is rotated.

In such a method, the air flow is first generated by a fan means. The flow path is selected depending on predetermined values. The fan means is thereby moved into a position, in particular rotated about an axis of rotation, which then directs the air flow to the predetermined flow path. In each case one of two leading to different channels positions is taken in particular by the fan means.

In a preferred embodiment, the flow path into which the air flow is directed is selected depending on the temperature value and / or humidity values. As a result, for example, at low outside temperatures such as -10 ° C from the interior of a room, the exhaust air to the heat exchanger over to the channel through which the outside air is passed to the heat exchanger, passed. This avoids freezing of the air in the area of the heat exchanger.

The invention will now be explained by way of example with reference to exemplary embodiments with reference to the accompanying figures.

1 shows an embodiment of a fan device according to the invention in a first position in a perspective view.

2 shows the fan device according to the invention 1 in an axial view.

3 shows the fan device according to the invention 1 in a second position in an axial view.

4 shows a further embodiment of a fan device according to the invention in an axial view.

The figures contain partially simplified, schematic representations. Z. T. identical reference numerals are used for the same, but possibly not identical elements.

1 shows a fan device according to the invention 1 , In this case, the fan device 1 a fan agent 4 and a mounting frame 8th with a first channel 2 with a first air intake 20 and a second channel 3 with a second air inlet 21 on, wherein - based on the selected representation - the first channel 2 laterally from the fan means 4 , and the second channel 3 is arranged down. The two channels 2 and 3 are designed so that they are in the area of the respective air intakes 20 . 21 are narrower than in an area away from the fan means 4 , The fan agent 4 has an impeller 9 with several blades 13 and a circular outer periphery of a shell-shaped impeller receptacle 6 with an outlet opening 7 on. The outlet opening 7 is through a recess in the impeller mount 6 is formed and located in the position shown immediately before the first channel 2 , In this position, the generated air flow is on a first flow path 11 through the first air intake 20 in the first channel 1 directed. The second air intake 21 and thus the second channel 3 are through the impeller intake 6 closed, so that the air flow only over the first air inlet 20 in the first channel 2 , and not on the second flow path 12 over the second air intake 21 in the second channel 3 is directed. By turning the impeller mount 6 in the direction of rotation 10 around the axis of rotation 5 , the exit opening becomes 7 in the direction of the second channel 3 emotional. The outlet opening 7 closes with the air intake 20 of the first channel 2 from that no edges or the like disturb the flow.

The installation frame 8th has a circular recess corresponding to the shape of the circular outer periphery of the impeller receiving 6 is adjusted. In the circular recess of the mounting frame 8th is the impeller intake 6 fitted so that they are around the axis of rotation 5 can be pivoted or rotated. The impeller intake 6 and the mounting frame 8th are essentially connected via an actuator which, for the sake of simplicity, is not shown. The actuator will move the impeller seat 6 around the axis of rotation 5 generates and thereby a position of the outlet opening 7 changed to redefine each.

The air flow to be conducted is generated by the air flowing radially through the impeller 9 is pushed outward. This creates a negative pressure leading to an axial suction of the air. Here are the blades 13 of the impeller 9 curved backwards in the running direction, curved forward or straight. The fan agent 4 Alternatively, it can also be used in the axial direction.

2 shows the fan device 1 out 1 in a view in the axial direction of the axis of rotation 5 , Here again is clearly seen that the outlet 7 with the first air intake 20 of the first channel 2 concludes. In addition, it can be seen that the first and the second channel 2 and 3 starting from the air inlets 20 . 21 from the outer periphery of the impeller seat 6 leading away widening.

3 shows the fan device 1 out 1 and 2 in a second position in an axial view. This was the impeller recording 6 of the fan agent 4 so in the direction of rotation 10 around the axis of rotation 5 turned that is the exit opening 7 in front of the second air intake 21 of the second channel 3 located. The first air intake 20 and thus the first channel 2 is through the impeller intake 6 locked. Thus, the air flow on the second flow path 12 over the second air intake 21 in the second channel 3 directed.

4 shows a further embodiment of a fan device according to the invention 100 , The fan device 100 has a fan means 104 , a recording 108 and a first channel 102 with a first air intake 120 and a second channel 103 with a second air inlet 121 on. The two channels 102 and 103 are - based on the selected representation - each other and each side of the fan means 104 arranged. The fan agent 104 has an impeller intake 106 with an outlet opening 107 and a circular outer periphery. Here are the air inlets 120 . 121 the two channels 102 and 103 arranged adjacent to each other so that an air flow in the illustrated position of the fan means 104 on both flow paths 111 and 112 through both air inlets 120 . 121 in both channels 102 and 103 is directed. By a rotary movement of the impeller intake 106 in the direction of rotation 110 around the axis of rotation 105 becomes the outlet 104 For example, brought into a position in which the first air inlet 120 of the first channel 102 through the impeller intake 106 is closed and the air flow only through the second air inlet 121 of the second channel 103 on the flow path 112 is directed. In the illustrated position of the fan means 104 a Gestamtluftstrom is divided so that air can flow through a heat exchanger and a leading past the heat exchanger bypass in about the same extent. By turning the fan means 104 namely, the impeller intake 106 , this distribution of air flow can be changed.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007041041 A1 [0003]
• DE 10142779 A1 [0004]
• DE 19508252 A1 [0005]

Claims (13)

Fan device ( 1 . 100 ) for generating and guiding an air flow comprising: - a fan means ( 4 . 104 ) for generating the air flow, - a first channel ( 2 . 102 ) for directing the air flow on a first flow path ( 11 . 111 ), - a second channel ( 3 . 103 ) for directing the air flow on a second flow path ( 12 . 112 ), wherein the fan means ( 4 . 104 ) is movably mounted in order, in a first position, the air flow into the first channel ( 2 . 102 ) and in a second position the air flow into the second channel ( 3 . 103 ). Fan device ( 1 . 100 ) according to claim 1, characterized in that the fan means ( 4 . 104 ) is designed as a radial fan. Fan device ( 1 . 100 ) according to one of the preceding claims, characterized in that the fan means ( 4 . 104 ) a rotation axis ( 5 . 105 ) and a jacket-shaped impeller receptacle ( 6 . 106 ) with a to the axis of rotation ( 5 . 105 ) concentric, in particular circular outer circumference to the fan means ( 4 . 104 ) in a to the outer circumference of the impeller receiving ( 6 . 106 ) adapted mounting frame ( 8th . 108 ) rotatable about the axis of rotation ( 5 . 105 ), wherein the jacket-shaped impeller receptacle ( 6 . 106 ) an outlet opening ( 7 . 107 ) for directing the air flow into the first and / or second channel ( 2 . 3 . 102 . 103 ) having. Fan device ( 1 . 100 ) according to one of the preceding claims, characterized in that an actuator means for rotating the fan means ( 4 . 104 ) about one or the axis of rotation ( 5 . 105 ) is provided. Fan device ( 1 . 100 ) according to claim 4, characterized in that the actuator means comprises a stepping motor and / or an expansion element or is designed as a stepping motor and / or as at least one expansion element. Fan device ( 1 . 100 ) according to one of the preceding claims, characterized in that the first and the second channel ( 2 . 3 . 102 . 103 ) a first and second air inlet ( 20 . 21 . 120 . 121 ) for introducing the air flow, wherein the first and second air inlet ( 20 . 21 . 121 . 120 ) are arranged adjacent to each other so that air from the fan means ( 4 . 104 ) depending on the position of the fan means ( 4 . 104 ) in both air inlets ( 20 . 21 . 120 . 121 ) can be initiated at the same time. Blowing agent ( 4 . 104 ) for generating an air flow, prepared for use in a fan device ( 1 . 100 ) according to any one of the preceding claims. Air conditioning unit for heating, cooling and / or ventilating, comprising: - at least one fan device ( 1 . 100 ) for generating and guiding an airflow according to one of claims 1 to 6, - at least one heat exchanger for transferring heat energy from a first medium to a second medium, wherein the first channel ( 2 . 102 ) for directing the flow of air through the heat exchanger and / or the second channel ( 3 . 103 ) are prepared to conduct the air flow past the heat exchanger. Air conditioner according to claim 8, characterized in that the air conditioner a control for adjusting a position of the fan means ( 4 . 104 ). Air conditioner according to one of claims 8 or 9, characterized in that the control depends on a measured temperature and / or humidity, the fan means ( 4 . 104 ) to direct the flow of air through the heat exchanger and / or past the heat exchanger. Air conditioner according to one of claims 8 to 10, characterized in that the heat exchanger is designed as a cross-heat exchanger. Method for operating a fan device ( 1 . 100 ) according to one of claims 1 to 6, comprising the following steps: - generating an air flow, - selecting a flow path ( 11 . 12 . 111 . 112 ) on which the air flow is to be conducted, - directing the air flow onto the selected flow path ( 11 . 12 . 111 . 112 ) by the fan means ( 4 . 104 ) is moved in a corresponding position, in particular rotated or pivoted. Method according to claim 12, characterized in that the flow path ( 11 . 12 . 111 . 112 ) into which the airflow is directed is selected depending on temperature values and / or humidity values.

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