DE102017103962A1 - Air / water heat pump with water droplet separation via louvred grille - Google Patents

Abstract

An air-to-water heat pump is described, comprising a closed refrigerant circuit through which a refrigerant flows, wherein the refrigerant circuit includes an evaporator configured to heat the refrigerant flowing through it using an air flow passing through the evaporator, and a fan for generating the air stream passing through the evaporator and discharging the air passing through the evaporator from a housing surrounding the heat pump. The heat pump described is characterized in that a lamellar grid is provided, which has passed through the evaporator passing and expelled from the housing with the fan running air, and the fins are arranged and designed such that when the fan is running out of the housing air to be ejected is deflected by the lamellae, so that the deflected air flow passes between the lamellae and in this way flows through the lamellar grid, and in the air to be ejected water droplets hit the lamellae and are prevented from passing through the louvred grille.

Description

The present invention relates to an air / water heat pump according to the preamble of patent claim 1.

Heat pumps are, for example, but by far not exclusively used for heating heating water and / or service water. The energy required for this purpose is withdrawn, for example, the heat pump supplied air. Such heat pumps are referred to as air / water heat pumps.

The basic structure of such a heat pump is in 1 illustrated.

The in the 1 shown heat pump is essentially formed by a flowed through by a refrigerant closed refrigerant circuit, which includes a compressor 1, a condenser 2, an expansion valve 3, and an evaporator 4. In addition, a fan 5 associated with the evaporator 4, which generates a stream of air passing through the evaporator 4, as well as a control device 6 controlling the aforementioned components.

In addition, heat pumps generally contain a whole range of other components, such as various temperature sensors and pressure switches, a condensate tray, a condensate tray heating system, etc., which, however, can be found in the 1 are not shown.

By the compressor 1, the circulating through the refrigerant circuit refrigerant is compressed, this compression has a correspondingly high heating of the refrigerant result. The heated refrigerant (also referred to as hot gas) passes from the compressor 1 to the condenser 2. The condenser 2 is a heat exchanger through which the hot gas and the medium to be heated by the heat pump (heating water, process water, etc.) flow. In this heat exchanger, heating of the medium to be heated by the heat pump takes place. Along with it, the refrigerant cools down. The refrigerant passes from the condenser 2 to the expansion valve 3. By the expansion valve 3, the still pressurized refrigerant is expanded. As a result, the refrigerant cools down even further. The expanded refrigerant passes from the expansion valve 3 on to the evaporator 4. The evaporator 4 is a flow-through by the refrigerant heat exchanger, which is passed by a generated by the fan 5 air flow. The air is, for example, outside air drawn from outside the building and / or from inside the building sucked, for example, from a tumble dryer or a cooker generated hot air. Since the air flow passing through the evaporator 4 is warmer than the refrigerant arriving at the evaporator 4, the refrigerant in the evaporator 4 is heated by the air flowing past it. The refrigerant passes from the evaporator 4 on to the compressor 1, in which it is compressed again.

The air flow passing through the evaporator 4 is generated by the fan 5. More specifically, the fan 5 sucks the air passing through the evaporator 4 from outside of the housing surrounding the heat pump into the housing, allows the sucked air to pass through the evaporator 4, and expels the air passing through the evaporator 4 out of the housing again ,

The sucked into the housing air passes through an air duct and a housing provided in the air inlet opening into the housing interior. The ejected air passes through a housing provided in the air outlet opening and an adjoining second air duct out of the housing.

The fan 5 is in the example considered a arranged between the evaporator 4 and the air outlet opening of the housing radial fan.

The controller 6 controls the heat pump heating system. Among other things, it monitors the temperature of the medium to be heated and / or the heated medium and switches the heat pump, more precisely the compressor 1 and the fan 5 thereof in and out of further parameters. The control device 6 also has a whole series of other functions such as, but not limited to, switching off the compressor 1 and the fan 5 when the pressure in the part of the refrigeration cycle carrying the hot gas becomes too great.

During operation of the heat pump, certain components thereof, in particular the evaporator 4, have a very low temperature. The refrigerant flowing through the evaporator 4 usually has a temperature below the air intake temperature. The consequence of this is that condenses outside of the evaporator 4 water. This water is at least partially entrained by the air stream passing through the evaporator 4, so that the air to be ejected from the housing contains more or less large water droplets. If these water droplets pass through the air outlet opening of the housing in the adjoining air duct, this can understandably lead to problems, especially as could accumulate considerable amounts of water in the air duct over time.

There are already known ways by which it is preventable that water droplets contained in the air to be ejected pass through the air outlet opening of the housing into the adjoining air duct. For example, it can be provided that the air to be ejected from the housing is blown by the fan 5 onto a baffle plate, which can be formed by a housing wall area adjoining the air outlet opening. The water droplets contained in the air to be ejected thus hit the baffle plate and can drain from there, for example, down into a condensate tray. The ejected from the housing air also hits the baffle plate, but is deflected by this to the adjacent air outlet opening. The ejected via the air outlet opening thus contains so much less water droplets than would be the case if the fan would blow out the air to be ejected from the housing directly, so without detour over the baffle plate on the air outlet.

However, solving the problem using a baffle plate is not optimal. Among other things, this solution leads to a greatly increased operating noise of the heat pump.

The present invention is therefore based on the object of finding a way of separating water droplets contained in the air to be ejected from the housing, which results in no or at least a slight increase in the operating noise of the heat pump.

This object is achieved by the claimed in claim 1 heat pump.

• - die aus dem Gehäuse auszustoßende Luft durch die Lamellen umgelenkt wird, sodass der umgelenkte Luftstrom zwischen den Lamellen hindurch verläuft und auf diesem Wege das Lamellengitter durchströmt, und
• - in der auszustoßenden Luft enthaltene Wassertröpfchen auf die Lamellen treffen und so an einem Durchtritt durch das Lamellengitter gehindert werden.

The heat pump according to the invention is characterized in that it contains a louvred grille, which has passed through the evaporator passing and expelled from the housing with the fan running air, and the fins are arranged and designed such that when the fan is running

• - The air to be ejected from the housing is deflected by the slats, so that the deflected air flow passes between the slats and flows through the louvred grille in this way, and
• - Meet in the air to be ejected water droplets on the slats and are prevented from passing through the louvred grille.

The use of a louver grid instead of a baffle plate or the like for trapping the water droplets contained in the air to be ejected has the advantage that the air to be ejected must be less deflected. The ejected air can namely flow through the louvred grille without a large change in direction. This in turn makes it possible to arrange the louvred grille in the air outlet opening or directly in front of it, so that the air to be ejected experiences only a comparatively slight change in direction on the way from the fan to the air outlet opening.

This only slight change in direction of the air to be ejected has the positive effect that the operating noise of the heat pump is much lower.

The water droplets contained in the air to be expelled are at least as well intercepted by the lamellar grid as by a baffle plate or the like. The water droplets meet on the way the air to the air outlet opening on the lamellar grid, more precisely on the slats of the louvred grille and can be passed from there, for example, in a condensate tray.

By the lamellar grid, the water droplets are intercepted even more effectively than by a baffle plate or the like. In the case of a baffle plate, it is the case that water droplets impinging thereon can be sprayed back from the latter and at least partially entrained by the air flow deflected toward the air outlet opening. Although water droplets can also splash back from the louvred grille, these are transported back to the louvred grille by the following air. In particular, therefore, they can not reach the air outlet opening between the slats.

Advantageous developments of the invention are the dependent claims, the following description, and the figures removed.

• 1 den prinzipiellen Aufbau einer Wärmepumpe,
• 2 eine perspektivische Ansicht der im Folgenden näher beschriebenen Wärmepumpe,
• 3 eine Draufsicht auf die in der 2 gezeigte Wärmepumpe bei abgenommenem Gehäuse-Oberteil,
• 4 eine vergrößerte Ausschnittsansicht der in der 3 gezeigten Darstellung,
• 5 eine die linke Seite der in der 2 dargestellten Wärmepumpe zeigende Seitenansicht bei teilweise nicht verschlossener linker Gehäusewand,
• 6 einzelne Lamellen eines Lamellengitters der in der 2 gezeigten Wärmepumpe, in einer Draufsicht von oben,
• 7 eine der in der 6 gezeigten Lamellen, in einer von der luftstromabwärts liegenden Seite gesehenen Ansicht,
• 8 die in der 7 gezeigte Lamelle mit eingezeichnetem Weg, entlang dessen sich ein Wassertröpfchen auf der Lamelle bewegt, und
• 9 eine perspektivische Ansicht des das Lamellengitter enthaltenden Wärmepumpen-Teils, mit eingezeichnetem vollständigem Weg des Wassertröpfchens bis in eine Kondensatwanne.

The invention will be explained in more detail by means of embodiments with reference to the figures. Show it

• 1 the basic structure of a heat pump,
• 2 a perspective view of the heat pump described in more detail below,
• 3 a plan view of the in the 2 shown heat pump with removed housing top,
• 4 an enlarged sectional view of the in the 3 shown illustration,
• 5 one the left side of the in the 2 shown heat pump side view if the left housing wall is partially closed,
• 6 individual lamellae of a lamellar lattice in the 2 shown heat pump, in a plan view from above,
• 7 one of the in the 6 shown in a view seen from the air downstream side view,
• 8th the in the 7 shown lamella with marked path along which a water droplet moves on the lamella, and
• 9 a perspective view of the louver grid containing heat pump part, with marked complete path of the water droplet into a condensate pan.

The heat pump described below is an air / water heat pump. However, in the present case, for the sake of simplicity, it is usually referred to only briefly as a heat pump.

The basic structure and the principal function of the heat pump presented here correspond to the structure and function of the in the 1 shown and initially described with reference thereto heat pump.

One possible practical realization of the heat pump presented here is in the 2 to 9 shown; the heat pump is therein with the reference numeral 10 designated. To avoid misunderstandings, it should be noted that in the present case, only the components of the heat pump of particular interest here 10 are shown and described.

The heat pump 10 has a frame or a frame to which the remaining components of the heat pump are attached directly or indirectly. This frame may, for example, like the frame 11 in the DE 20 2008 000 950 U1 be designed and used heat pump described. Unlike the known heat pump, the scope of the presently described heat pump 10 however, preferably at least partially expanded polypropylene (EPP), and has a construction adapted to this material. EPP has good thermal insulation properties and high strength at the same time. The good thermal insulation properties have the positive effect that no or at least less condensation can form on the frame. Instead of EPP could also be another foamed plastic or other material with good thermal insulation properties are used.

The heat pump 10 has a lower section 10-1 and an upper section located above 10-2 on. The lower section 10-1 and the top section 10-2 are cuboid in the example considered, but have different base areas and different heights. There is no restriction on this. The two heat pump sections can independently of each other have any shapes and sizes. In the upper section 10-2 the heat pump components are accommodated, on which the usual way condensate forms or can form, so one (the evaporator 4 according to 1 corresponding) evaporator 12 , one (the fan 5 according to 1 corresponding) fan 13 , and a condensate tray 14 , In the lower section 10-1 the heat pump 10 the remaining heat pump components are housed, so in particular the compressor, the condenser etc .. The lower section 10-1 the heat pump 10 and housed therein heat pump components are not of interest in the present case, so that will not be discussed in detail.

The upper section 10-2 the heat pump 10 has a thermally insulating insulating sheath, which in the upper section 10-2 housed housed heat pump components. The heat pump components which are to be located inside the insulating sheath in the considered example all comprise the upper section 10-2 the heat pump accommodated heat pump components, in the example considered so the evaporator 12 , the fan 13 , and the condensate tray 14 , For the sake of completeness, it should already be pointed out at this point that more or less and / or other than the abovementioned heat pump components can also be accommodated in the area surrounded by the insulating sheath. In particular, it may also accommodate, for example, various sensors, switches, etc.

The insulation shell consists in the example considered of several items that are like the other heat pump components directly or indirectly attached to the frame already mentioned above. In the intended assembled state results in a cuboid insulating cover. However, there is no compelling need to form the insulation shell cuboid. The insulation sheath can also have any other shape. The insulating sheath can, for example, like the insulating sheath in the DE 20 2008 000 950 U1 be constructed and mounted heat pump described. There is no restriction on this. The number, the size, the shape, the arrangement, the attachment, and all other properties of the insulation cover and their individual parts may also be arbitrary differ. Preferably, the individual parts of the insulation cover as well as the frame consist at least partially of expanded polypropylene (EPP), so that no or at least less condensation water can form on the outer surfaces of the insulation cover. Instead of EPP could also be another foamed plastic or other material with good thermal insulation properties are used.

The outer skin of the heat pump 10 is formed by housing plates, which in the example considered consist of metal, but could also be made of a different material. The housing plates are attached to the frame and / or adjacent housing plates and / or other heat pump components. In the upper section 10-2 the heat pump 10 the housing plates are arranged around the insulation sheath around. In the lower section 10-1 this is not the case, because there is no insulation cover provided. Preferably, there is no or at least no direct connection between the insulation cover and the surrounding housing plates.

The frame and the housing plates together form a housing surrounding the heat pump 15 , The here primarily interesting upper heat pump section 10-2 has a front housing wall 15-V , a right housing wall 15-R , a left housing wall 15-L , a rear housing wall 15-H , and an upper housing wall 15-O on.

In the example considered, the rear housing wall 15-H a recess, not shown in the figures, which an air inlet opening 17 the heat pump 10 forms. The recess passes through the rear housing wall 15-H and the rear insulation sheath plate. Over the air inlet 17 can thus air from outside the heat pump 10 get into the area lying inside the insulation shell. From the air inlet opening, a not shown in the figures air duct goes to the point from which in the heat pump 10 to be transported air to be transported.

In the example considered, the right housing wall 15-R a recess on which an air outlet opening 16 the heat pump 10 forms. The recess passes through the right housing wall 15-R and the right insulation sheath plate. Over the air outlet 16 can thus air from the area lying within the insulation shell to the outside of the heat pump 10 reach. From the air outlet 16 a not shown in the figures air duct goes to the point from which the heat pump 10 to be transported air to be transported.

There is no compelling need for the air inlet opening 17 and the air outlet 16 in the rear housing wall 15-H or the right housing wall 15-R are provided. The said openings can in principle independently of each other at any point of the heat pump 10 be provided.

The over the air inlet opening 17 in the heat pump 10 passing air is used to heat the evaporator 12 required by flowing refrigerant. The the evaporator 12 passing airflow is doing by the fan 13 generated. More precisely, it is like that the fan 13 the the evaporator 12 passing air through the air inlet opening in the heat pump 10 sucked in, the sucked air the evaporator 12 lets pass, and the evaporator 12 has passed air through the air outlet opening 16 out of the heat pump. This is in the 3 illustrated by the arrows denoted by L.

In the present case gets into the heat pump 10 sucked air through one with the air inlet opening 17 connected air duct to the heat pump 10 , and gets out of the heat pump 10 expelled air through one with the air outlet opening 16 connected air duct removed from the heat pump, but this is depending on the location of the heat pump and the other local conditions no compelling need.

The ventilator 13 is in the example considered a between the evaporator 12 and the air outlet 16 arranged radial fan. The ventilator 13 blows the evaporator 12 has happened air in the direction of the right housing wall 15-R , The direction of this from the fan 13 to the right housing wall 15-R running airflow L runs in the example considered perpendicular to the right housing wall 15-R but this is not mandatory. The said airflow L reaches the right housing wall 15-R right where the air outlet 16 located. Without a later described in more detail lamellar grid 20 would the complete airflow L unhindered and without any deflection through the air outlet opening 16 from the heat pump 10 be ejected.

The aforementioned lamellar grid 20 is located in the example considered in the air outlet opening 16 , More specifically, the louver grid 20 formed by an insert or a part of an insert in the air outlet opening 16 can be used.

It should be noted at this point that the lamellar grid 20 also at another place along the air stream L between the evaporator 12 and the air outlet 16 . So somewhere in the heat pump 10 downstream of the evaporator 12 can be provided. It is important in the first place that the air to be ejected only after passing through the louvred grille 20 over the air outlet 16 can escape from the housing. More precisely, the lamellar grid 20 arranged so that the out of the case 15 Exhausted air can only be such air, previously the lamellar grid 20 flowed through.

The louvred grille 20 is arranged and adapted to be discharged from the air to be ejected from the housing L is flowed through and causes water droplets contained in the air to be ejected on the lamellar grid 20 meet and thereby at a passage through the lamellar grid 20 , and consequently be prevented from leaving the housing. The on the lamellar grid 20 impinging water droplets flow off the lamellar grid and collect at a predetermined location within the housing 15 , More specifically, the water droplets in the manner described in more detail later on a defined way in the condensate pan 14 derived. The airflow L is after passing the louvred grille 20 therefore completely or at least almost free of water droplets.

The louvred grille 20 includes a plurality of mutually parallel slats 21 and one the slats 21 encircling frame 22 on which the slats 21 are attached. The louvred grille 20 consists in the considered example of plastic and is formed as a coherent unit, wherein the lamellar lattice components, in particular the lamellae 20 and the louvred frame 22 are not movable relative to each other. In principle, the lamellar grid could 20 but also consist of any other material and or be constructed differently, for example, relative to the lamellar frame 22 movable slats 21 exhibit.

In the example considered, the slats 21 formed by a plurality of juxtaposed vertical slats (slats with vertical longitudinal axes). Although this is currently the most advantageous orientation and arrangement of the slats 21 is considered, the slats 21 could also be aligned and arranged differently. More specifically, it could also be arranged on top of each other arranged horizontal slats (slats with horizontally extending longitudinal axes) or slats with obliquely extending at any other angle longitudinal axes.

• - die Vorderkante 21-V durch eine Rundung mit etwa halbkreisförmigem Querschnitt gebildet wird,
• - die Hinterkante 21-H durch eine größtenteils ebene Fläche gebildet wird, die sich senkrecht zur Richtung des beim Lamellengitter 20 ankommenden Luftstroms L erstreckt,
• - die rechte Seitenfläche 21-R und die linke Seitenfläche 21-L durch ebene Flächen gebildet werden, und
• - die Dicke der Lamellen 21 von der Vorderkante 21-V zur Hinterkante 21-H hin kontinuierlich zunimmt.

All slats 21 of the louvred grille 20 are identical in terms of shape, size and arrangement. As in particular from 6 it can be seen, the slats 21 one leading edge each 21-V , one of the leading edge opposite trailing edge 21-H , a left side surface extending between the leading edge and the trailing edge 21-L and a right side surface opposite the left side surface 21 -R on, with the leading edge 21-V the air upstream end of the respective blade 21 forms, so the fan 13 facing lamella side, and wherein the trailing edge 21-H the air downstream end of each lamella 21 forms, that of the fan 13 remote fins side is. In the example considered, it is also the case that

• - the front edge 21-V is formed by a rounding with an approximately semicircular cross-section,
• - the trailing edge 21-H is formed by a largely flat surface, which is perpendicular to the direction of the lamellar grid 20 incoming airflow L extends
• - the right side surface 21-R and the left side surface 21 -L are formed by flat surfaces, and
• - the thickness of the slats 21 from the front edge 21-V to the trailing edge 21-H continuously increases.

• - eine anders geformte Vorderkante 21-V aufweisen, und/oder
• - eine anders geformte Hinterkante 21-H aufweisen, und/oder
• - parallel zueinander verlaufende Seitenflächen 21-R und 21-aufweisen, und/oder
• - nicht ebene, das heißt beispielsweise gewölbte oder anders verlaufende Seitenflächen 21-R und/oder 21-L aufweisen, und/oder,
• - beliebige andere Querschnitte wie beispielsweise rechteckige, dreieckige, parallelogrammförmige, tropfenförmige, sichelförmige, hakenförmige, wellenförmige, sägezahnförmige, oder sonstige Querschnitte aufweisen.

It should be noted at this point that no restriction to such, in the 6 illustrated formation of the slats 21 consists. The fins 21 can also be designed differently. You can, for example, just to name a few of almost unlimited modification options

• - a different shaped front edge 21-V have, and / or
• - a different shaped trailing edge 21-H have, and / or
• - Side surfaces running parallel to each other 21-R and 21 -have, and / or
• - not flat, that is, for example, curved or otherwise running side surfaces 21-R and or 21-L have, and / or,
• - Have any other cross-sections such as rectangular, triangular, parallelogram-shaped, teardrop-shaped, crescent-shaped, hook-shaped, wave-shaped, sawtooth-shaped, or other cross-sections.

The slats 21 are arranged so that they are not parallel to the air flow striking them L are aligned, but are rotated by a certain angle about its longitudinal axis, wherein the angle of rotation is at least so great that the air flow striking the slats L not without a diversion of the same between the slats 21 can get through. This applies to the entire air flow. That is, it must not be even a part of the arriving at the fins 21 air flow L without deflection between the slats 21 can get through. The rotation of the lamellae 21 about their longitudinal axis is in the 6 illustrated; the mentioned rotation angle is there with α designated. How big this angle of rotation α Ideally, among other things, depends on how large the mutual behavior of the slats 21 are, and how wide the individual slats are. The fins 21 are arranged and formed such that the angle of rotation is between 5 ° and 45 °. Preferably, the angle is between 10 ° and 30 °. In the example considered, the angle is 20 °, as mentioned, other angles are possible. More specifically, when viewed from above, the (vertically arranged) fins 21 from above the slats 21 in relation to the direction of the incoming airflow L rotated by 20 ° counterclockwise about their longitudinal axes. A corresponding clockwise rotation is also possible. Even if the longitudinal axes of the slats 21 not vertically, but horizontally or obliquely, these have corresponding rotations about their longitudinal axes.

The rotations of the slats 21 about their longitudinal axes, their dimensions, and the mutual distances of adjacent lamellae 21 are chosen so that the air flow L , not just part of the airflow L , the slats 21 can not happen in a straight way. That means the complete air flow L meets on the way to the air outlet 16 on the slats 21 and is deflected by these so that he with changed direction between the slats 21 through to the air outlet opening 16 arrives.

Because no part of the airflow L without previous impact on the slats 21 to the air outlet opening 16 can also get in the air stream L contained water droplets not unhindered to the air outlet opening 16 reach. The in the air stream L water droplets are more likely to hit the fins 21 and are placed over this in the condensate tray 14 derived.

For this purpose, the lamellar grid 20 special Wasserleitvorrichtungen on. More specifically, both the fins 21 and the louver grid frame 22 designed so that on the slats 21 impinging water droplets in a defined manner over the slats 21 and the louvred frame 22 into the condensate tray 14 be directed.

• - zunächst durch die zwischen den Lamellen 21 hindurchströmende Luft L an den Seitenflächen 21-R bzw. 21-L entlang nach hinten zur Hinterseite 21-H bewegt werden und an den hinteren Enden der Lamellen 21 auf deren Hinterseiten 21-H gelangen,
• - dort aufgrund der Schwerkraft an der Hinterseite 21-H nach unten laufen,
• - durch eine im unteren Bereich der Hinterseiten 21-H der Lamellen 21 vorgesehene Umleitungsvorrichtung wieder auf die Seitenflächen 21-R und/oder 21-L geleitet werden,
• - an den Seitenflächen 21-R und/oder 21-L aufgrund der Schwerkraft weiter nach unten laufen, bis sie den Lamellengitterrahmen 22 erreichen.

The slats 21 are designed for this purpose that on the side surfaces 21-R and or 21-L impinging water droplets

• - first through the between the slats 21 air flowing through L on the side surfaces 21-R respectively. 21-L along the back to the back 21-H be moved and at the rear ends of the slats 21 on their backs 21-H reach,
• - there due to gravity at the back 21-H run down,
• - by one in the lower area of the rear sides 21-H the slats 21 provided diverting device again on the side surfaces 21-R and or 21-L be directed
• - on the side surfaces 21-R and or 21-L due to gravity continue to run down until they reach the louvred frame 22 to reach.

Already on the slats 21 , or even later on the frame 22 For example, the initially rather small droplets of water can combine to form larger drops of water or a flowing trickle.

The diverting device for returning the water droplets to the side surfaces 21-R and or 21-L the slats 21 is in the example considered by one in the lower area of the rear sides 21-H the slats 21 provided notch 23 educated. Such a notch 23 is on each lamella 21 intended. The notch 23 extends over the entire thickness of the respective blade 21 , It has such a shape that on the backs 21-H the slats 21 down running water into the notch 23 flows in, so at the top of the notch 23 no drip edge or the like structures are present at which the incoming water drips down there. The upper portion of the notch is viewed in the example by one of the back 21-H outgoing, obliquely downward slope formed.

The lower end of the notch 23 is designed so that in the notch 23 do not run over the water 21-H from the notch, but over the side surfaces 21-L and or 21-R ,

• - befindet sich die breiteste Stelle der Erhebung 24 an deren unterem Ende,
• - ist die Breite der Erhebung 24 an deren unterem Ende gleich der Dicke der Lamelle 21 an dieser Stelle, und
• - wird die Erhebung 24 nach oben hin immer schmäler.

In the example considered, the lower end of the notch runs 23 horizontal and is with a survey 24 provided in the example considered over the entire depth of the notch 23 extends at this point. Such as in the 7 shown top view of the lamella 21 seen from behind,

• - is the widest part of the survey 24 at the lower end,
• - is the width of the survey 24 at the lower end equal to the thickness of the lamella 21 at this point, and
• - will the survey 24 upwards narrower and narrower.

In the example considered, the survey points 24 in the plan view from behind an approximately semicircular cross section. However, the survey could also have a different cross-section that meets the above conditions, for example, a triangular cross-section.

In the 8th Fig. 10 illustrates how a water droplet W contained in the air to be ejected from the housing is passed over a fin 21 to the condensate tray 14 arrives. The water droplet W is on the way to the air to be ejected to the air outlet 16 More precisely, when passing through the louvred grille 20 on the slat 21 met. In the example considered, the water droplet W on the left side surface 21-L of the lamella 21 met. Through the between the slats 21 air flowing through it becomes the water droplet W over the side surface 21-L in the direction of airflow back towards the rear 21-H the slat 21 emotional. At the same time the water droplet moves W due to gravity more or less far down. The way of the water droplet W is in the 8th represented by a dash-dotted line. At the rear end of the slat 21 arrived, the water droplets W on the back 21-H blown. There it runs straight down due to gravity until it reaches the notch 23 reached. The water droplet W follows the course of the back 21-H and thus, driven by gravity, runs into the notch 23 into it. There it meets the elevation 24 and runs over this again from the notch 23 out. Due to the special shape of the notch 23 gets the water droplet W but not back to the back 21-H of the slat 21 , It runs rather laterally over the survey 24 away down and thus passes as in the 8th automatically illustrates on the right side surface 21-R and / or the left side surface 21-L the slat 21 ,

Like from the 9 it can be seen, the water droplets are running W after leaving the notch 23 on the left side surface 21-L continue down and then finally reaches the louvred frame 22 , The frame 22 has a slope at this point. Over this gradient, the water droplet runs in the direction of the lamellar leading edge 21-V until it's the end of the frame 22 reached. There it drips into the underlying condensate tray 14 ,

The water droplets W , Which are contained in the air to be ejected from the housing, thus meet the slats 21 of the louvred grille 20 , and be on a defined path across the slats 21 and the frame 22 directed into the condensate tray 14. The air to be expelled contains after passing through the louvred grille 20 no or at most negligible few water droplets. Of the water droplets originally contained in the air to be ejected, all or almost all are in the condensate pan in the manner described 14 directed.

As in particular from the 2 to 4 it can be seen is not the entire louvred frame in the example considered 22 with slats 21 filled. That is, the frame 22 contains a finned area. This, in the 2 right, and in the 3 and 4 The louvred grille area shown above represents an emergency opening, through which the air to be expelled from the housing can escape, if not via the louvers as described above 21 is possible. This case can occur, for example, if the fins are so icy or dirty that no air passage is possible there. In this case, the clogged lamellae would act as a baffle plate, through which the air arriving at the fins to the lamella-free area of the louvred grille 20 is deflected and can leave the housing on this slat-free area.

The lamella-free area of the louvred grille 20 is provided at a location by the fan 13 is not blown, so that the air to be expelled from the housing in the normal operation of the heat pump completely through the slats 21 is expelled through the housing, and no air escapes through the lamella-free area. Only when the slats 21 are closed by ice, dirt, etc., the lamellae act as a baffle plate and can deflect the air to the lamellar-free area. Also in this case, contained in the air to be ejected water droplets are removed from the air to be ejected. The water droplets also hit the lamellae when the lamellae are clogged and run downwards or freeze there and then run off later. Although the water droplets in this case run off in another way, but they are still removed from the expelled air.

It should be clear and need no further explanation that there is no compelling need for the provision of a finned-free area or any other emergency opening. If the slats for whatever reason under normal conditions can not or at least not completely clog, no emergency opening is needed.

It can also be provided that the lamella-free area can be closed and is opened only when necessary, wherein the opening and closing can be done manually or automatically.

Additionally or alternatively, it can be provided, the slats 21 to heat. As a result, it is possible to prevent the lamellae from freezing, and in this case too, an emergency opening can be dispensed with.

It will be appreciated that there are a variety of ways to modify the described heat pump.

For example, it may be provided that not only the upper section 10-1 the heat pump as described is surrounded by an existing example of EPP insulation sheath, but also the lower portion 10-2 , As a result, among other structural advantages can be achieved. More specifically, it can, for example, the structure of the heat pump in the upper section 10-1 and whose lower portion 10-2 are unified. For example, all housing plates can be fastened to the insulation sheath. This simplifies the assembly of the heat pump and opens up more freedom in the design. In addition, this can achieve a higher stability of the heat pump housing.

Regardless of this, as already mentioned above, there is no compelling need for the air outlet opening 16 provided on the right side of the heat pump. The air outlet opening 16 may for example also be provided on the left side or at the top of the heat pump. Preferably, the heat pump is constructed so that two or more openings are provided in the housing, as the air outlet opening 16 are usable, in which case in the actual air outlet opening 16 used opening the louvred grille 20 is used, and all other openings are hermetically sealed by blind cover. Thus, the heat pump can be adapted in a very simple manner to the local conditions at the installation site. It can be decided spontaneously and individually on site, where the air outlet opening 16 should be located. In the example considered, two openings are provided, which can be used as an air outlet opening. One of these openings is located on the right heat pump side and is the air outlet opening shown in the figures 16 , The second opening is opposite to the left heat pump side. In the 5 You can see through this (not shown in the illustration) second opening through heat pump inside. In operation, this second opening is hermetically sealed by a blind cover.

Under certain circumstances, it may prove advantageous, more than one air outlet 16 provide, so for example on the right heat pump side, a first air outlet opening 16 , and on the left heat pump side, a second air outlet opening 16 provided. In this case, would have in each of the housing opening used as an air outlet opening a louvred grille 20 be used.

As explained above, the heat pump presented here proves advantageous in many respects, regardless of the details of the practical implementation.

LIST OF REFERENCE NUMBERS

1

compressor

2

condenser

3

expansion valve

4

Evaporator

5

fan

6

control device

10

heat pump

10-1

lower section of 10

10-2

upper section of 10

12

Evaporator

13

fan

14

Drain pan

15

casing

15-V

front housing wall

15-R

right housing wall

15-L

left housing wall

15-H

rear housing wall

15-O

upper housing wall

16

Air outlet opening

17

Air inlet opening

20

louvred grille

21

lamella

21-V

Leading edge of 21

21-H

Trailing edge of 21

21-R

right side surface of 21

21-L

left side surface of 21

22

Louvred grille frame

23

Notch in 21

24

Survey in 23

α

Rotation angle of 21 to longitudinal axis of 21

L

of 13 generated airflow

W

water droplets

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 202008000950 U1 [0026, 0029]

Claims (30)

An air / water heat pump, comprising - a closed refrigerant circuit through which a refrigerant flows, wherein the refrigerant circuit includes an evaporator (4, 12) which is designed to heat the refrigerant flowing through it using an air flow (L) passing through the evaporator, and a fan (5, 13) for generating the air flow passing through the evaporator (4, 12) and for discharging the air passing through the evaporator from a housing (15) surrounding the heat pump, characterized by a louvred grille (20) running fan (5, 13) from which the evaporator (4, 12) has passed and from the housing (15) to be ejected air flows through, and the lamellae (21) are arranged and designed such that when the fan (5, 13 ) - which is to be ejected from the housing (15) to be ejected air through the slats (21), so that the deflected air flow between the slats (21) passes through and au for this way, the lamellar grid (20) flows through, and - meet in the air to be ejected water droplets (W) on the slats (21) and are prevented from passing through the lamellar grid (20). Air / water heat pump after Claim 1 , characterized in that the louvred grille (20) is provided downstream of the evaporator (4, 12). Air / water heat pump after Claim 1 or 2 , characterized in that the housing (15) has an air outlet opening (16) which is provided for ejecting the air to be expelled from the housing (15) from the housing, and in that the louvred grille (20) is arranged between the evaporator (4, 12). and the air outlet opening (16) is provided. Air / water heat pump after Claim 1 or 2 , characterized in that the housing has an air outlet opening (16) which is provided for ejecting the air to be ejected from the housing (15) from the housing, and that the louvred grille (20) in the air outlet opening (16) is provided. Air / water heat pump after Claim 4 , characterized in that the lamellar grid (20) is part of an insertable into the air outlet opening (16) insert. Air / water heat pump according to one of the preceding claims, characterized in that the louvred grille (20) is arranged and designed such that the air expelled from the housing (15) can only be air that previously flows through the louvred grille (20) Has. Air / water heat pump according to one of the preceding claims, characterized in that the louvred grille (20) is arranged and designed such that water droplets (W) impinging thereon flow off the louvred grille (20) and at a predetermined location within the housing (15 ) collect. Air / water heat pump according to one of the preceding claims, characterized in that the louvred grille (20) comprises a plurality of mutually parallel lamellae (21) and a the lamellae (21) encircling frame (22) on which the lamellae (21 ) are attached. Air / water heat pump according to one of the preceding claims, characterized in that the slats (21) are formed by a plurality of juxtaposed vertical slats, so are slats with vertical longitudinal axes. Air-to-water heat pump according to one of the preceding claims, characterized in that the lamellae (21) are not aligned parallel to the air flow (L) impinging on them, but on the other hand are rotated by a certain angle about their longitudinal axis, the angle of rotation ( α) is at least so large that the air flow striking the slats can not pass without a deflection of the same between the slats (21). Air / water heat pump after Claim 10 , characterized in that the lamellae (21) are aligned so that not only a part of the arriving at the lamellae air flow (L) can pass without deflection between the lamellae 21. Air / water heat pump after Claim 10 or 11 , characterized in that the angle of rotation (α) is between 5 ° and 45 °. Air / water heat pump according to one of Claims 10 to 12 Characterized in that the rotation angle (α) is 20 °. Air / water heat pump according to one of the preceding claims, characterized in that the lamellae (21) each have a front edge (21-V), one of the front edge opposite trailing edge (21-H), extending between the leading edge and the trailing edge left Side surface (21-L) and one of the left side surface opposite right side surface (21-R), wherein the leading edge (21-V) forms the upstream end of the respective blade (21), and the trailing edge (21-H) forms the downstream end of the respective blade (21). Air / water heat pump after Claim 14 , characterized in that the leading edge (21-V) of each blade (21) is formed by a rounding of approximately semicircular cross-section. Air / water heat pump after Claim 14 or 15 , characterized in that the trailing edge (21-H) of each blade (21) is formed by a substantially flat surface extending perpendicular to the direction of the air stream (L) arriving at the blade grid (20). Air / water heat pump according to one of Claims 14 to 16 characterized in that the thickness of each blade (21) continuously increases from its leading edge (21-V) to its trailing edge (21-H). Air-to-water heat pump according to one of the preceding claims, characterized in that the lamellae (21) are arranged and designed such that water droplets (W) impinging on the lamellae pass through the air (L) flowing between the lamellae (21) to the lumen Side surfaces (21-R) and (21-L) of the slats (21) along the back to the rear side (21-H) of the slats are moved and at the rear ends of the slats (21) on the rear sides (21-H) reach, Air / water heat pump according to one of the preceding claims, characterized in that on the rear side (21-H) of the slats (21) reached water droplets (W) due to gravity on the rear side (21-H) run down. Air / water heat pump according to one of the preceding claims, characterized in that in the lower region of the rear side (21-H) of each lamella (21) a bypass device is provided, through which on the rear side (21-H) running down water droplets (W) on the side surfaces (21-R, 21-L) of the respective blade (21) are passed. Air / water heat pump after Claim 20 , characterized in that the lamellae (21) are arranged and formed such that water droplets (W) guided by the bypass device on the side surfaces (21-R, 21-L) of the respective lamella (21) due to gravity on the side surfaces (21). 21-R, 21-L) continue down until they reach the louvred frame (22). Air / water heat pump after Claim 21 , characterized in that the lamellar frame component on which the water droplets (W) run, is inclined towards a condensate tray (14), so that the water droplets due to gravity on the louvred frame (22) run into the condensate pan (14) , Air / water heat pump after Claim 20 , characterized in that the diverting device is formed by a notch (23) provided in the lower region of the rear side (21-H) of each lamella (21) and formed so as to run downwardly at the rear side (21-H) Water flows into the notch (23). Air / water heat pump after Claim 23 , characterized in that the lower end of the notch (23) is formed such that the run into the notch (23) water does not flow beyond the rear side (21-H) of the lamella (21) from the notch (23), but over their side surfaces (21-L 21-R). Air / water heat pump after Claim 23 or 24 characterized in that the lower end of the notch (23) extends horizontally and is provided with a protrusion (24) which extends over the entire depth of the notch (23) at that point and tapers towards the top so that there incoming water laterally over the elevation (24) away from running down and thereby reaches the right side surface (21-R) and / or the left side surface (21-L) of the blade (21). Air / water heat pump after Claim 25 , characterized in that the elevation (24) in the plan view from behind has an approximately semicircular cross-section. Air / water heat pump according to one of the preceding claims, characterized in that the louvred grille (20) contains a lamellar-free area, which is used in clogged lamellae (21) as an emergency opening for the air to be ejected from the housing. Air / water heat pump according to one of the preceding claims, characterized in that a slat heating is provided for heating the slats. Air / water heat pump according to one of the preceding claims, characterized in that in the housing (15) two or more openings are provided which can be used as an air outlet opening (16), wherein the louvred grille (20) is insertable into each of said openings. Air / water heat pump after Claim 29 , characterized in that only in the actually used as an air outlet opening (16) openings a louvred grille (20) is inserted, and all other openings are hermetically sealed by blind cover.

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