Condenser

Abstract

The invention relates to a condenser comprising a housing having an inlet opening for inputting a fluid into the condenser and an outlet opening for outputting the fluid from the condenser, and a channel system for fluidly connecting the inlet opening and the outlet opening, the channel system being arranged in the housing and comprising a dividing portion in which the inputted fluid is divided into a plurality of channels and a grouping portion in which the plurality of channels are merged into an outlet channel, a first end of the outlet channel terminating in the outlet opening and a second end of the outlet channel terminating in the grouping portion. The condenser is characterized in that the vertical distance between the second end of the outlet channel and the housing bottom is 0% to 80% of the vertical distance between the housing bottom and the upper housing side.

Description

[Technical field]

[0001] The present invention relates to a condenser, a heat transfer system comprising such a condenser. Furthermore, the present invention relates to a heat pump having such a condenser or heat transfer system and to the use of a condenser in a heat transfer system or heat pump. [Background technology]

[0002] Several different shapes of condensers are known from the prior art. The condensers can be used in heat pumps. To meet the regulations, it is necessary to use natural refrigerants. In particular, the use of refrigerants as R134a, which is harmful to the environment, must be prevented. For this purpose, it is known to use refrigerants that are flammable fluids such as propane. In this case, the risk of leakage is important and has a greater impact, since the load is ten times lower compared to condensers where R134a is used as refrigerant. It is known that the sustainability against leakage is affected by the subcooling of the fluid in the condenser. Therefore, great efforts are made to improve the efficiency of the condensers.

[0003] WO 2017 012 718 discloses a condenser through which a natural refrigerant flows. The condenser has a housing and a channel system arranged in the housing. The condenser is in contact with a fluid tank. The channel system comprises a single channel and a distribution area including a plurality of split branches, each branch distributing the conveyed fluid along the single channel from a channel with a current cross section to two channels with the same cross section and an outlet for the refrigerant fluid in liquid phase. The outlet is preceded by at least one grouping area including a plurality of convergent branches, said grouping area grouping N channels with the same cross section into a channel with the same cross section.

[0004] The disadvantage of the condenser is that the subcooled fluid is heated by the fluid located in the fluid tank during the flow between the grouping area and the outlet opening of the condenser. The heat transfer from the fluid tank to the fluid is large because the thermal surface area over which the fluid is heated is large. The heat transfer from the fluid tank to the fluid flowing in the condenser occurs because the warmer fluid in the fluid tank is located in the upper area of ​​the fluid tank due to density differences. However, as mentioned above, the heating of the fluid has disadvantages in terms of leakage when the condenser is used, for example, in a heat pump. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2017 012 718 Summary of the Invention [Problem to be solved by the invention]

[0006] It is an object of the present invention to provide a condenser in which the fluid leaving the condenser is heated less than in known condensers. [Means for solving the problem]

[0007] This object is solved by a condenser comprising a housing having an inlet opening for inputting a fluid into the condenser and an outlet opening for outputting a fluid from the condenser, and a channel system for fluidly connecting the inlet opening and the outlet opening, the channel system being arranged in the housing and comprising a dividing portion in which the inputted fluid is divided into a plurality of channels and a grouping portion in which the plurality of channels are integrated into an outlet channel, characterized in that a first end of the outlet channel terminates in the outlet opening and a second end of the outlet channel terminates in the grouping portion, and the vertical distance between the second end of the outlet channel and the housing bottom is 0% to 80% of the vertical distance between the housing bottom and the upper housing side.

[0008] It was recognized that by providing the second end of the outlet channel in a position located closer to the housing bottom compared to the known condenser, the fluid can be prevented from being heated to the same extent as in the known condenser. Such an arrangement of the second end of the outlet channel allows the fluid flowing through the outlet channel to be heated less than in the condenser disclosed in WO 2017 012 718, for example, since the thermal surface area over which the fluid can be heated by the fluid tank is lower than in the condenser disclosed in WO 2017 012 718. In particular, in the condenser it is possible to cool the fluid that has entered the condenser, in particular continuously, between the inlet opening and the grouping part. After passing through the grouping part, the cooled fluid is slightly heated until it leaves the condenser by the outlet opening. In contrast to the condenser disclosed in WO 2017 012 718, the fluid is first cooled. However, the fluid is also heated before reaching the outlet channel.

[0009] This improvement helps to obtain an overall efficiency by increasing the capacity of the expansion valve and avoids gas being generated in the outlet channel. Furthermore, the subcooling of the fluid can be improved, leading to a lower risk of leakage if the condenser is used, for example, in a heat pump.

[0010] The condenser also has a smaller channel volume in order to reduce the refrigerant load: for example, the condenser can have a volume of 0.15 l (liters) compared to known condensers with a volume of 3 liters.

[0011] A fluid connection may be any connection that allows fluid to flow from one component to another or vice versa. For example, a channel in a housing may be considered a fluid connection because it allows fluid to flow from an inlet opening to an outlet opening.

[0012] The inlet opening can be fluidly connected to an inlet line and the outlet opening can be fluidly connected to an outlet line. The inlet line and the outlet line can each be fixedly attached to the condenser. In particular, the inlet line and the outlet line can be welded to the condenser, in particular to the housing.

[0013] The fluid flowing through the inlet line and entering the condenser through the inlet opening is typically at least partially in a gas phase. The fluid leaving the condenser through the outlet opening to the outlet line is in a liquid phase. Thus, a phase change occurs within the channel system. In particular, the phase change occurs before the liquid enters the outlet channel of the channel system.

[0014] As the "housing bottom", the housing side of the condenser is considered to be located at the geodesically lowest point of the housing, relative to the ground, in the mounted state of the condenser in the fluid tank. As the "upper housing side", the housing side of the condenser is considered to be located at the geodesically highest point and thus located furthest from the ground. The housing bottom and the upper housing side can extend parallel to each other and / or are located opposite each other. In the mounted state, the housing bottom and the upper housing side are spaced apart from each other along a vertical direction. The vertical direction is parallel to the direction of gravity.

[0015] The distance can be determined in a plane oriented parallel to the vertical direction and comprising the second end of the outlet channel and the housing bottom and / or upper housing side surface, the plane intersecting the housing bottom and / or upper housing side surface and therefore not including the complete surface of the housing bottom and / or the complete surface of the upper housing side surface.

[0016] The channel extending between the dividing portion and the grouping portion can have the same cross section. The cross section can be constant along the extension of the channel between the dividing portion and the grouping portion. The outlet channel can have the same cross section as the channel. The cross section of the outlet channel can be constant between the first end and the second end of the outlet channel.

[0017] The fluid flowing through the condenser can be a natural refrigerant such as ammonia (NH3), carbon dioxide (CO2) and hydrocarbons, in particular propane or isobutane. Further suitable refrigerants include A2L, R32, R1234YF, R134a or R410. The use of refrigerants R134a and R410 has the advantage that the load and / or cost can be reduced.

[0018] When the distance between the second end of the outlet channel and the housing bottom is 0% of the distance between the housing bottom and the upper housing side, the outlet opening is in direct fluid connection with the grouping channel. In this case, the outlet channel corresponds to the outlet opening.

[0019] According to an embodiment, the distance between the second end of the outlet channel in the vertical direction and the housing bottom can be smaller than the distance between the second end of the outlet channel in the vertical direction and the upper housing side surface. The distance between the second end of the outlet channel and the housing bottom can be 0% to 40%, in particular 10% to 30%, preferably 15% to 25% of the distance between the housing bottom and the upper housing side surface. Such an embodiment has the advantage that the amount of heat from the fluid tank provided in the fluid is further reduced.

[0020] Water can be stored in a fluid tank. The water is at a lower temperature than the fluid flowing into the condenser, so that the fluid flowing into the condenser is cooled by the water provided in the tank. However, as mentioned above, due to density differences, the water arranged in the upper region of the water tank is warmer than the water arranged in the lower region of the water tank. This results in the fluid flowing through at least a part of the outlet channel being able to be heated by the water arranged in the water tank.

[0021] The grouping part can be adapted such that the multiple channels are merged into only one outlet channel. In this case, the condenser only comprises one outlet opening, further reducing the amount of heat provided to the fluid by the fluid tank. The grouping part can comprise a curved, in particular circular, channel. The multiple channels and the outlet channel can be in direct fluid communication with said channel. The dividing part and the grouping part can have the same or similar basic shape.

[0022] The length of the outlet channel can be smaller than the length of one channel between the dividing portion and the grouping portion, particularly the length of each of the multiple channels. The shorter the length of the outlet channel, the less likely the fluid in the outlet channel will be heated by the fluid in the fluid tank.

[0023] A short length of the outlet channel can be achieved if the outlet channel comprises or only has a straight section between its first and second ends. The straight section can extend in a vertical direction when the condenser is attached to the tank. In particular, the straight section can be configured such that the fluid flow direction is perpendicular to the fluid flow direction of the fluid entering the grouping section. In particular, the straight section of the outer channel can be longer than the remaining part of the outlet channel. The remaining part can fluidly connect the grouping section of the channel system with the straight section of the outlet channel. Providing a straight section has the advantage that the area for heat exchange between the fluid flowing in the outlet channel and the fluid tank is minimized. As mentioned above, the condenser is heated after passing through the grouping section. The straight section is the shortest possibility to connect two points, so the thermal area is minimized.

[0024] The outlet channel can be adapted such that the fluid is not redirected between the second end of the outlet channel and the first end of the outlet channel. This can be achieved if the outlet channel simply comprises a straight section. The straight section can then extend in a direction that can be parallel to the upper housing side, in particular in a horizontal direction.

[0025] Alternatively, the fluid flowing through the outlet channel can be redirected only once between the second end of the outlet channel and the first end of the outlet channel, which may be necessary if the outlet opening is located on the upper housing side.

[0026] According to an embodiment, the outlet opening and the inlet opening can be arranged on the upper housing side. Alternatively, the outlet opening and the inlet opening are arranged on different housing sides. In particular, the inlet opening can be arranged on the upper housing side and the outlet opening can be arranged on a lateral housing side. The lateral housing side connects the upper housing side with the housing bottom. Alternatively, the outlet opening is arranged on the housing bottom. In this case, the heat transfer from the fluid tank to the fluid flowing through the outlet channel is further reduced.

[0027] The housing can be adapted to be flexible so that it can be easily attached to the fluid tank. Furthermore, the housing can be adapted such that the housing portion comprising at least a portion of the outlet channel protrudes from the remaining housing portion. The housing portion can comprise at least a portion of a straight portion of the outlet channel. The at least a portion of the housing portion and the remaining housing portion can be arranged offset from each other. In particular, the housing portion can protrude from the remaining housing portion in a radial direction with respect to the fluid tank. The housing can comprise a slot dividing at least a portion of the housing portion from the remaining housing portion. In particular, the slot can extend from an upper housing side towards the housing bottom. Providing a slot makes it easier to bend the housing portion to protrude from the remaining housing portion. Furthermore, the slot reduces heat transfer.

[0028] The housing may have a rectangular shape, with the upper housing side and the housing bottom forming the long sides of the rectangle. Alternatively, the housing may have other shapes. In particular, the housing may have a circular or square shape. The shape configuration depends on the application of the condenser.

[0029] The distance between two of the channels in the direction along the short side of the housing is shorter than the distance between at least a part of the outlet channel and a channel of the plurality of channels in the other direction along the long side of the housing. In particular, the distance between the straight part of the outlet channel and the further plane with the channel oriented towards the straight part, in particular the maximum extension of each of the channels, can be shorter than the distance between the channels. Such an arrangement of the outlet channels ensures that there is a distance region between the outlet channels and the channels such that the heat input from the fluid flowing in the channel to the fluid flowing in the outlet channel by heat conduction is low.

[0030] According to an embodiment, at least one of the plurality of channels extending between the dividing portion and the grouping portion extends in a serpentine pattern. In particular, all of the plurality of channels extend in a serpentine pattern. Such a pattern increases the heat transfer area, so that the fluid flowing in the channel is easily ensured to change from gaseous to liquid phase.

[0031] The number of channels extending between the division portion and the grouping portion can be constant, i.e., there is no other grouping portion in which the number of channels is reduced. The number of channels can be kept constant, since each channel volume can be almost completely filled with fluid. In particular, 90% of the channel volume can be filled with fluid.

[0032] The housing can be a roll-bonded housing. Roll-bonding is a welding process in which two or more plates can be welded together through a set of rollers that generate extreme pressure. As a result, a bond occurs and a new product is formed by the two plates. Such roll-bonded housings have the advantage that they are flexible and therefore can be easily attached to cylindrical fluid tanks which ensures a large contact surface between the housing and the fluid tank.

[0033] The housing may comprise two plates joined together, in particular roll-jointed or brazed or welded. One of said plates may be embossed to form the channel system. The embossing may be performed before assembling the plates. Alternatively, the embossing may be performed after assembling the plates, for example by expansion. In this case, a diffusion barrier agent is applied to one of the plates in a pattern that reproduces the channel system, so that the two plates are not tied to the location of the future channels. The channel system is then produced by expansion at high temperature deformation. The plate may be an aluminum plate.

[0034] The housing can be provided with through holes for the fluid inlet connection of the fluid tank, which can be arranged such that the channels of the channel system have to pass around the through holes, and the shift of the channels to the upper housing side is kept as small as possible.

[0035] The housing bottom may include alignment means for angularly aligning the condenser so that it can be easily mounted in the fluid tank in the correct orientation. The alignment means may be a slot in the housing bottom.

[0036] The inlet opening can be arranged in an inlet portion of the housing separated by the remaining housing by at least one groove. Furthermore, the outlet opening can be arranged in an outlet portion of the housing separated by the remaining housing by at least one other groove. By providing a groove, the inlet portion and the outlet portion can be easily bent. This simplifies the connection of the inlet line to the inlet opening, since the inlet portion can be bent into the required position. The same applies to the connection of the outlet portion and the outlet line.

[0037] According to an advantageous embodiment, a heat transfer system is provided, comprising a fluid tank and at least one condenser of the invention, the condenser being attached to the fluid tank, the condenser being capable of being attached to a lower region of the fluid tank.

[0038] The insulating element can be disposed between the housing part comprising at least a portion of the outlet channel and the fluid tank, which is possible since the housing part can protrude from the remaining housing, and the provision of the insulating element can reduce the amount of heat from the fluid tank to the fluid flowing through the outlet channel.

[0039] A further condenser is provided, the condenser and the further condenser being connected to one another by a connecting means, the housing part being capable of resting on the connecting means when the condensers are connected to one another.

[0040] According to an embodiment, a heat pump is provided. The heat pump may include a heat transfer system, a pump for recirculating a fluid in a fluid circle of the heat pump, an evaporator, and an expansion valve. The condenser, the pump, the evaporator, and the expansion valve are fluidly connected to each other. The fluid stored in the fluid tank is not fluidly connected to the condenser, the pump, the evaporator, and the expansion valve. The heat pump may be part of an air source heat pump or a ground source heat pump. [Brief description of the drawings]

[0041] In the figures, the subject matter of the invention is illustrated diagrammatically, and identical or similarly acting elements are generally provided with the same reference signs.

[0042] [Figure 1] 1 shows a schematic diagram of a condenser of the present invention according to a first embodiment. [Diagram 2] 2 shows a cross section of a portion of the condenser shown in FIG. 1. [Diagram 3] 2 shows a heat transfer system with a condenser as shown in FIG. [Figure 4] 4 shows a cross-section of a portion of the heat transfer system shown in FIG. 3. [Diagram 5] FIG. 2 shows a schematic diagram of a heat pump having a condenser as shown in FIG. 1. [Figure 6] 4 shows a grouping of a condenser according to a second embodiment. [Figure 7] 13 shows a grouping of a condenser according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0043] Figure 1 shows a condenser 1 comprising a housing 2 and a channel system 5. The housing has an inlet opening 3 for inputting a fluid into the condenser 1. The input fluid may be in gas phase. Furthermore, the housing 2 has an outlet opening 4 for outputting a fluid from the condenser 1. The output fluid may be in liquid phase.

[0044] A channel system 5 is used to fluidly connect the inlet opening 3 and the outlet opening 4 and is disposed within the housing 2. The channel system 5 comprises a dividing portion 6, in which the input fluid is divided into a plurality of channels 7. In particular, an inlet channel 30 is provided, which fluidly connects the inlet opening 3 with the dividing portion 6. Furthermore, the channel system 5 comprises a grouping portion 8, in which the plurality of channels 7 are merged into a single outlet channel 9. The grouping portion 8 is enclosed by a dotted rectangle shown in FIG. 1. A first end 10 of the outlet channel 9 terminates within the outlet opening 4 and a second end 11 of the outlet channel 9 terminates within the grouping portion 8.

[0045] The outlet channel 9 is formed such that a distance d1 between the second end 11 of the outlet channel 9 and the housing bottom 12 in the vertical direction V is 0% to 80% of a distance d2 between the housing bottom 12 and the upper housing side surface 13 in the vertical direction V. The distances d1, d2 can be determined in a plane 14 comprising the second end 11 of the outlet channel 9 and a part of the housing bottom 12 and a part of the upper housing side surface 13. In particular, the distance d1 is less than about 50% of the distance d2, preferably less than 30% of the distance d2, in particular less than 15% of the distance d2.

[0046] The inlet opening 3 is fluidly connected to an inlet line 31, which is fixedly attached to the housing 2. The outlet opening 4 is fluidly connected to an outlet line 32, which is fixedly attached to the housing 2.

[0047] The housing 2 comprises an inlet portion 22 with an inlet opening 3. The housing 2 comprises two grooves 23 which separate the inlet portion 22 from the other housing portions. The two grooves 23 allow the inlet portion 22 to be easily bent. The housing 2 also comprises an outlet portion 24 with an outlet opening 4. Furthermore, the housing 2 comprises two further grooves 25 which separate the outlet portion 24 from the other housing portions. The two further grooves 25 allow the outlet portion 24 to be easily bent.

[0048] The channel system 5 comprises a number of channels 7 extending between the dividing portion 6 and the grouping portion 8. The channels 7 each extend in a serpentine pattern. Serpentine refers to an irregular or regularly curved, meandering design of the channels.

[0049] The outlet channel 9 has a straight portion 15 that terminates in the outlet opening 4. The straight portion 15 is longer than the remainder of the outlet channel 9. The remainder comprises a second end 11 of the outlet channel 9 that terminates at the grouping portion 8. As the fluid meets at the grouping portion 8 and enters the outlet channel 9, it is redirected once before exiting the condenser by the outlet opening 4.

[0050] The housing 2 is rectangular in shape. The upper housing side 13 and the housing bottom 12 form the long sides of the rectangular housing. The inlet and outlet openings 3, 4 are arranged in the upper housing side. The housing 2 comprises a housing portion 16 in which a straight portion 15 of the outlet channel 9 is arranged. The housing portion 16 is cross-hatched in FIG. 1. At least a portion of the housing portion 16 is separated from the remaining housing portion 17 by a slot 18.

[0051] Slot 18 extends from upper housing side 13 toward housing bottom 12, but terminates before reaching housing bottom 12. Slot 18 allows housing portion 16 to be easily bent such that it protrudes partially from remaining housing portion 17 when attached to fluid tank 20 as shown in FIG.

[0052] The housing 2 comprises a number of mounting openings 33 through which the condenser 1 can be connected to the fluid tank 20 and / or to another condenser. The mounting openings 33 can be located along lateral housing sides of the housing 2 that connect the upper housing side 13 with the housing bottom 12. The mounting openings 33 are spaced apart from one another.

[0053] Alignment means 21 are located on the housing bottom 12. Alignment means 21 are in the form of a recess and are used to position the condenser in the correct angular position on the fluid tank 20. The housing 2 is provided with a through hole 19 for receiving a fluid inlet connection 37, as shown in Figure 3.

[0054] Figure 2 shows a cross section of a part of the condenser 1. In particular, Figure 2 shows a cross section of a housing 2 with channels 7. The housing comprises a first plate 34 having a planar shape and an embossed second plate 35. In particular, the second plate 35 is embossed such that the channels 7 are formed between the first plate 34 and the second plate 35. The second plate 35 is embossed such that the channel system 5 as described above is formed. The first plate 34 and the second plate 35 are roll-bonded such that the housing 2 is the final product of the roll-bonding process.

[0055] Fig. 3 shows a heat transfer system 26 including the condenser 1 shown in Fig. 1. In addition to the condenser 1, the heat transfer system 26 includes a fluid tank 20. The fluid tank 20 is used to store a fluid, such as water, and to cool the fluid flowing through the condenser 1. In the embodiment shown in Fig. 3, a coil is disposed in the fluid tank 20. The condenser 1 can also be attached to a fluid tank 20 that does not have a coil.

[0056] The condenser 1 is in direct contact with the fluid tank 20 and is arranged in a lower region, in particular in the bottommost region, of the fluid tank 20. Therefore, the housing 2 is flexible so that it can adapt to the shape of the fluid tank 20.

[0057] The heat transfer system 26 comprises a further condenser 28 which is also in contact with the fluid tank 20. The two condensers 1, 28 are connected to each other by a number of connection means 36. Each of the connection means 36 is engaged with a mounting opening 33 of the respective condenser 1, 28.

[0058] The fluid tank 20 comprises a fluid inlet connection 37. The fluid inlet connection 37 extends through the through hole 19 in the housing 2. Fluid can be input to the fluid tank 20 by the fluid inlet connection 37.

[0059] Figure 4 shows a cross-sectional view of a part of the heat transfer system 26 with the condenser 1 along the section AA shown in Figure 3. However, Figure 4 does not show the connection means 36 used to connect the two condensers 1, 28 to each other. Figure 4 shows only the wall of the fluid tank 20 on which the condenser 1 is mounted.

[0060] As mentioned above, the housing portion 16 is bent from the remaining housing portion 17 shown in Fig. 1 along a radial direction R relative to the fluid tank 20. In particular, the housing portion 16 is bent such that a part of the housing portion 16 is positioned offset relative to the remaining housing portion 17. This means that said part of the housing portion 16 is not in direct contact with the fluid tank 20 of the remaining housing portion 17 of the housing, but a space is formed between the fluid tank 20 and the part of the housing portion 16.

[0061] An insulating element 27 is arranged in said space, thus insulating the fluid tank from the outlet channel 9 , in particular the straight portion 15 of the outlet channel 9 arranged in the housing part 16 .

[0062] Figure 5 shows a schematic diagram of a heat pump 29 comprising a condenser 1. The condenser 1 is attached to the fluid tank 20 as described in Figure 3. The heat pump 29 also comprises a pump 38 for recirculating fluid in the fluid circuit of the heat pump 29, an evaporator 39 and an expansion valve 40. The condenser 1, the pump 38, the evaporator 39 and the expansion valve 40 are fluidly connected.

[0063] FIG. 6 shows a grouping part 8 of a condenser according to another embodiment. The grouping part 8 differs from the grouping part shown in FIG. 1 in that it comprises a circular channel 41. The channel 7 is directly connected to the circular channel 41. Furthermore, the outlet channel 9, in particular the second end 11 of the outlet channel, is directly connected to the circular channel 41. Alternatively, the grouping part 8 can be configured such that the channel 7 is directly connected to the second end 11 of the outlet channel 9. Such an embodiment is shown in FIG.

[0064] The dividing portions 6 and the grouping portions 8 of the condenser 1 can have the same or similar basic shapes.

[0065] 7 shows the grouping part 8 of the condenser according to the third embodiment. The third embodiment differs from the second embodiment in the form of the grouping part 8. The grouping part 8 comprises two combined channels 42 which are directly connected at one end to the two channels 7 and at the other end to the second end 11 of the outlet channel 9. [Explanation of symbols]

[0066] 1 Condenser 2. Housing 3 Inlet opening 4 Outlet opening 5 Channel System 6 divided parts 7 Channels 8 Grouping Part 9. Exit Channel 10 First end of outlet channel 11 Second end of the outlet channel 12 Bottom of housing 13 Upper housing side 14 plane 15 Straight section 16 Housing part 17 Remaining housing parts 18 Slots 19 Through hole 20 Fluid Tank 21 Alignment means 22 Entrance section 23 Groove 24 Exit part 25 Other Grooves 26 Heat Transfer Systems 27 Thermal insulation elements 28 Further Condensers 29 Heat Pump 30 Entrance Channel 31 Entrance Line 32 Exit Line 33 Mounting opening 34 First Plate 35 Second Plate 36 Connection means 37 Fluid inlet connection 38 Pump 39 Evaporator 40 Expansion valve 41 Curved, especially circular, channels 42 Combined Channels R Radial direction V vertical direction d1 the distance between the second end of the outlet channel and the bottom of the housing d2 Distance between the bottom of the housing and the side of the upper housing

Claims

1. A condenser (1), comprising: a housing (2) having an inlet opening (3) for inputting a fluid into the condenser (1) and an outlet opening (4) for outputting the fluid from the condenser (1); a channel system (5) for fluidly connecting said inlet opening (3) and said outlet opening (4), said channel system (5) being arranged in said housing (2) and comprising a dividing portion (6) in which the input fluid is divided into a plurality of channels (7) and a grouping portion (8) in which said plurality of channels (7) are united into an outlet channel (9); a first end (10) of said outlet channel (9) terminating in said outlet opening (4) and a second end (11) of said outlet channel (9) terminating in said grouping portion (8); a vertical (V) distance (d1) between the second end (11) of the outlet channel (9) and a housing bottom (12) is 0% to 80% of a vertical (V) distance (d2) between the housing bottom (12) and an upper housing side surface (13), and the grouping portion (8) comprises a circular channel (41) connected to the plurality of channels (7) and the outlet channel (9).

2. a. the distance (d1) between the second end (11) of the outlet channel (9) and the housing bottom (12) in the vertical direction (V) is smaller than the distance between the second end (11) of the outlet channel (9) and the upper housing side (13) in the vertical direction (V), or b. the distance (d1) between the second end (11) of the outlet channel (9) and the housing bottom (12) is between 0% and 40% of the distance between the housing bottom (12) and the upper housing side (13); A condenser (1) according to claim 1, characterised in that

3. a. in said grouping portion (8), said channels (7) are merged into a single outlet channel (9); and / or b. the length of said outlet channel (9) is less than the length of one channel (7) extending between said dividing portion (6) and said grouping portion (8); A condenser (1) according to claim 1 or 2, characterised in that

4. a. said outlet channel (9) comprises a straight portion (15) between its first end (10) and second end (11); and / or b. the outlet channel (9) comprises a straight portion (15), the straight portion (15) being longer than the remainder of the outlet channel (9), and / or c) the outlet channel (9) is adapted such that the fluid is not redirected between the second end (11) of the outlet channel (9) and the first end (10) of the outlet channel (9) or is redirected only once between the second end (11) of the outlet channel (9) and the first end (10) of the outlet channel (9); A condenser (1) according to claim 1, characterised in that

5. 2. The condenser (1) according to claim 1, characterized in that the outlet opening (4) and the inlet opening (3) are arranged in the same upper housing side (13).

6. 2. The condenser (1) according to claim 1, characterized in that the housing part (16) comprising at least a part of the outlet channel (9) protrudes from the remaining housing part (17).

7. a. the housing (2) comprises a slot (18) extending from the upper housing side (13) and dividing at least a portion of the housing portion (16) from the remaining housing portion (17); and / or b. at least a portion of the housing portion (16) and the remaining housing portion (17) are offset from one another; A condenser (1) according to claim 6, characterised in that

8. 2. The condenser (1) according to claim 1, characterized in that the housing (2) has a rectangular shape and the distance between two channels (7) of the plurality of channels (7) in a direction along a short side of the housing (2) is shorter than the distance between at least a part of the outlet channel (9) and the channel (7) of the plurality of channels (7) in another direction along a long side of the housing (2).

9. a. at least one channel (7) of the plurality of channels (7) extending between the dividing portion (6) and the grouping portion (8) extends in a serpentine pattern; and / or b. the number of channels (7) extending between the dividing portion (6) and the grouping portion (8) is constant; A condenser (1) according to claim 1, characterised in that

10. a. the housing (2) is a roll-bonded housing, and / or b. said housing (2) comprises two plates (34, 35) joined together; and / or c) the housing (2) is provided with a through hole (19) for a fluid inlet connection of a fluid tank (20); and / or d. the housing bottom (12) is provided with alignment means (21) for angularly aligning the condenser (1); A condenser (1) according to claim 1, characterised in that

11. a. the inlet opening (3) is located in an inlet portion (22) of the housing (2) separated by the remainder of the housing by at least one groove (23); and / or b. said outlet opening (4) is arranged in an outlet portion (24) of said housing (2) separated by the remaining housing by at least one other groove (25); A condenser (1) according to claim 1, characterised in that

12. A heat transfer system (26) comprising a fluid tank (20) and at least one condenser (1) according to claim 1, said condenser (1) being attached to said fluid tank (20).

13. a. a thermal insulation element (27) is disposed between said housing portion (16) and said fluid tank (20); and / or b. a further condenser (28) is provided, said condenser (1) and said further condenser (28) being connected to each other; A heat transfer system (26) according to claim 12, characterised in that

14. A heat pump (29) comprising a condenser (1) according to claim 1 or a heat transfer system (26) according to claim 12.

15. Use of a condenser (1) according to claim 1 in a heat transfer system (26) according to claim 12.

16. Use of a condenser (1) as described in claim 1 in a heat pump (29) as described in claim 14.

17. A heat transfer system (26) comprising a fluid tank (20) and at least one condenser (1) attached to the fluid tank (20), the condenser (1) comprising: a housing (2) having an inlet opening (3) for inputting a fluid into the condenser (1) and an outlet opening (4) for outputting the fluid from the condenser (1); a channel system (5) for fluidly connecting said inlet opening (3) and said outlet opening (4), said channel system (5) being arranged in said housing (2) and comprising a dividing portion (6) in which the input fluid is divided into a plurality of channels (7) and a grouping portion (8) in which said plurality of channels (7) are united into an outlet channel (9); a first end (10) of said outlet channel (9) terminating in said outlet opening (4) and a second end (11) of said outlet channel (9) terminating in said grouping portion (8); a vertical (V) distance (d1) between the second end (11) of the outlet channel (9) and the housing bottom (12) is 0% to 80% of a vertical (V) distance (d2) between the housing bottom (12) and an upper housing side surface (13), A heat transfer system (26), wherein a housing part (16) comprising at least a portion of the outlet channel (9) protrudes from a remaining housing part (17), and an insulating element (27) is arranged between the housing part (16) and the fluid tank (20). a. the distance (d1) between the second end (11) of the outlet channel (9) in the vertical direction (V) and the housing bottom (12) is smaller than the distance between the second end (11) of the outlet channel (9) in the vertical direction (V) and the upper housing side surface (13), or b. the distance (d1) between the second end (11) of the outlet channel (9) and the housing bottom (12) is between 0% and 40% of the distance between the housing bottom (12) and the upper housing side (13); A heat transfer system (26) according to claim 17, characterised in that

19. a. In the grouping portion (8), the plurality of channels (7) are combined into a single outlet channel (9), and / or b. the length of said outlet channel (9) is smaller than the length of one channel (7) extending between said dividing portion (6) and said grouping portion (8), and / or c. the grouping portion (8) comprises a circular channel (41) connected to the plurality of channels (7) and the outlet channel (9); A heat transfer system (26) according to claim 17 or 18, characterised in that Claim 20: a. The outlet channel (9) comprises a straight portion (15) between its first end (10) and second end (11); and / or b. the outlet channel (9) comprises a straight portion (15), the straight portion (15) being longer than the remainder of the outlet channel (9), and / or c) the outlet channel (9) is adapted such that the fluid is not redirected between the second end (11) of the outlet channel (9) and the first end (10) of the outlet channel (9) or is redirected only once between the second end (11) of the outlet channel (9) and the first end (10) of the outlet channel (9); A heat transfer system (26) according to claim 17, characterised in that

21. A heat transfer system (26) as described in claim 17, characterized in that the outlet opening (4) and the inlet opening (3) are arranged on the same upper housing side (13).

22. a. the housing (2) comprises a slot (18) extending from the upper housing side (13) and dividing at least a portion of the housing portion (16) from the remaining housing portion (17); and / or b. at least a portion of the housing portion (16) and the remaining housing portion (17) are offset from one another; A heat transfer system (26) according to claim 17, characterised in that

23. A heat transfer system (26) as described in claim 17, characterized in that the housing (2) has a rectangular shape and the distance between two channels (7) of the plurality of channels (7) in a direction along a short side of the housing (2) is shorter than the distance between at least a portion of the outlet channel (9) and the channel (7) of the plurality of channels (7) in another direction along a long side of the housing (2). At least one of the plurality of channels (7) extending between the dividing portion (6) and the grouping portion (8) extends in a serpentine pattern; and / or b. the number of channels (7) extending between the dividing portion (6) and the grouping portion (8) is constant; A heat transfer system (26) according to claim 17, characterised in that

25. a. The housing (2) is a roll-bonded housing, and / or b. said housing (2) comprises two plates (34, 35) joined together; and / or c) the housing (2) is provided with a through hole (19) for a fluid inlet connection of a fluid tank (20); and / or d. the housing bottom (12) is provided with alignment means (21) for angularly aligning the condenser (1); A heat transfer system (26) according to claim 17, characterised in that

26. a. The inlet opening (3) is located in an inlet portion (22) of the housing (2) separated from the rest of the housing by at least one groove (23); and / or b. said outlet opening (4) is arranged in an outlet portion (24) of said housing (2) separated by the remaining housing by at least one other groove (25); A heat transfer system (26) according to claim 17, characterised in that

27. ​​A further condenser (28) is provided, the condenser (1) and the further condenser (28) being connected to each other. A heat transfer system (26) according to claim 17, characterised in that

28. A heat pump (29) having a heat transfer system (26) as described in claim 17.

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