Drying device, in particular an air circulation drying device

Abstract

The invention relates to a drying device, in particular a forced-air drying device, for a dishwasher, comprising an intake duct (10) providing an air intake opening (11) and an outlet duct (12) providing an air outlet opening (13), as well as a blower (14) to which the intake duct (10) and the outlet duct (12) are fluidically connected on the air intake side, wherein the blower (14) has a housing (23) and a blower wheel (24) rotatably arranged therein, characterized by a further blower (25) having an air inlet (31) and an air outlet (29) opening into the ambient atmosphere, wherein the further blower (25) has a further housing (26) and a further blower wheel (27) rotatably arranged therein, and by a motor assembly (30) which is connected to the blower wheel (24) and the further blower wheel (27) is in operative connection.

Description

[0001] The invention relates to a drying device, in particular a recirculating air drying device, for a dishwasher, comprising an intake duct providing an air intake opening, an outlet duct providing an air outlet opening, and a blower to which the intake duct and the outlet duct are fluidically connected on the air intake side, wherein the blower has a housing and a blower wheel rotatably arranged therein.

[0002] Dishwashers in general, and those with a drying device of the type mentioned above in particular, are well known from the prior art, which is why a separate printed reference is not required at this point.

[0003] A dishwasher, particularly a typical household dishwasher, has a wash chamber that serves to hold the items to be cleaned. In the case of a household dishwasher, these items are primarily dishes and cutlery.

[0004] In normal use, a dishwasher undergoes drying after the washing process. Various drying methods are known in the art, including hot air drying, in which the items to be dried are exposed to previously heated drying air. The air contained within the dishwasher's wash chamber can be used as the drying air, in which case hot air drying takes place in recirculation mode. Alternatively and / or in combination with this, fresh air drawn from the atmosphere surrounding the dishwasher can also be used for drying.

[0005] Regardless of whether hot air drying is carried out using recirculated air and / or fresh air, a drying unit is used for airflow and heating. This unit provides the necessary air ducts and includes a fan and a heating element. Furthermore, temperature sensors may be incorporated to regulate the heating output and monitor the system.

[0006] A drying device of this type for hot air drying has an intake duct on one side and an exhaust duct on the other. The intake duct provides an air intake opening, while the exhaust duct has an air outlet opening. In normal use, drying air is supplied to the intake duct through the air intake opening and then conveyed through the exhaust duct to the air outlet opening. The drying air exiting the drying device through the air outlet opening then enters a dishwashing container of a dishwasher connected to the drying device.

[0007] To convey the drying air, the drying device has a blower. The intake duct and the outlet duct are connected to this blower in a flow-optimized manner. The blower has a housing and a fan wheel, which is rotatably mounted within the housing. Under normal operating conditions, the fan wheel is driven by a suitable electric drive unit. The blower is preferably a radial blower.

[0008] To heat the drying air, the drying unit also has a heating element. This is typically located in the outlet duct, meaning that the air drawn in by the blower passes through the heating element before leaving the drying unit via the air outlet opening.

[0009] Although the aforementioned design has proven itself in everyday practical use, there is room for improvement. It has been shown that, even with a drying system, dishwashers with automatic door opening do not provide sufficient protection against moisture damage caused by repeated condensation on furniture surfaces adjacent to the dishwasher. This needs to be avoided, which is why the invention is based on... Task The aim is to further develop a drying device of the type mentioned above in such a way as to prevent corresponding moisture damage.

[0010] To SolutionThe invention proposes a drying device of the type mentioned above to solve this problem, characterized by a further blower having an air inlet and an air outlet opening into the ambient atmosphere, wherein the further blower has a further housing and a further blower wheel rotatably arranged therein, and by a motor device that is operatively connected with the blower wheel and the further blower wheel.

[0011] It has been observed that, despite the drying unit, significant amounts of steam can escape through the door gap in dishwashers with automatic door opening. Since the surrounding furniture surfaces are colder than the escaping steam, uncontrolled condensation occurs on these surfaces. The underside of a worktop covering the top of the dishwasher, facing the door gap, is particularly affected. To remedy this, the drying unit according to the invention includes an additional fan. This additional fan has an air outlet venting into the ambient atmosphere. During operation, this additional fan generates an airflow that is released into the ambient atmosphere and also flows across the door gap created when the door opens automatically.As a result, the steam escaping through the gap when the dishwasher door is open is diluted. Consequently, unwanted condensation on surfaces adjacent to the dishwasher, especially furniture surfaces, is prevented.

[0012] The drying device according to the invention has two blowers. A first blower and a second blower are provided. The first blower serves to draw in drying air and transfer it into the wash chamber for drying the dishes. The second blower, however, is designed to draw in ambient air and also release it back into the atmosphere surrounding the dishwasher's wash tub. The air outlet of the second blower is therefore not in fluidic contact with the wash chamber provided by the wash tub. Rather, the air leaving the second blower flows around the outside of the wash tub, so that when the door is open, steam escaping from the wash tub through the door opening gap can be diluted by the airflow around the wash tub. In addition, the airflow generated by the second blower ensures that steam escaping from the wash tub is carried away.Thus, not only is the vapor diluted, but also its removal. Both effects achieved by the inventive design ensure that unwanted condensation on adjacent object and / or furniture surfaces is avoided, or at least minimized.

[0013] Each of the two blowers has a housing and a fan wheel rotatably mounted within it. The drying unit is equipped with a motor unit to drive the fan wheels. According to the invention, this motor unit is operatively connected to the fan wheel of both the first and second blowers. Thus, instead of a separate motor unit for each blower, only a single motor unit is required for both blowers, which is operatively connected to the fan wheels of both blowers equally. This results in an overall compact design that also allows for simple control and operation during normal use.

[0014] The drying device designed according to the invention advantageously fulfills two functions. According to a first function, during normal operation, the items to be washed are dried with previously heated drying air. According to a second function, unwanted condensation is prevented by generating an additional airflow alongside the drying air. This airflow serves to dilute the steam escaping from the wash tub and to carry it away from the dishwasher and adjacent surfaces. The drying device designed according to the invention is therefore particularly suitable for dishwashers with automatic door opening, where, at the end of a normal drying process, the door may open slightly, potentially allowing steam to escape.An automatic door opening is therefore desirable to prevent condensation from forming on the dishes inside the wash tub when steam escapes through the door. The drying device according to the invention thus achieves an optimized drying result in two respects. Firstly, the drying air generation dries the dishes. Secondly, a partial opening of the wash tub door is possible, allowing any residual water vapor to escape from the wash tub, and thanks to the design according to the invention, this occurs without the risk of condensation forming on surfaces of objects and / or furniture adjacent to the dishwasher.

[0015] The drying device according to the invention is both compact in design and easy to operate, since only one motor unit is provided for the intended operation of both blowers, which is in operative connection with the blower wheels of both blowers equally. Thus, in intended operation, both blower wheels are driven by one and the same motor unit.

[0016] According to a further feature of the invention, the two blowers are arranged side by side with the motor unit positioned between them. The two blowers thus form a double blower. This double blower includes the motor unit, which is arranged between the two blowers. This results in a very compact design overall and also ensures that a direct power connection of the blower wheels, driven in the intended use, to the motor unit is permitted.

[0017] According to a further feature of the invention, the two housings are designed to be separate from each other. Thus, one housing is provided for each blower. This housing contains the respective blower wheel. This design advantageously allows a drying unit to be optionally equipped with an additional blower, particularly when the drying blower is intended for use in a dishwasher with an automatic door opening mechanism. Therefore, this design provides the option of retrofitting a drying unit with an additional blower, if necessary, even after initial installation.

[0018] Alternatively, the two housings can be combined into a single, unified housing, meaning that separate housings are not required. In the case of a single, unified housing, this housing contains both fan wheels and preferably also the motor assembly.

[0019] According to a further feature of the invention, the two blowers are designed such that each has a preferred direction of rotation, hereinafter also referred to as the operating direction of rotation, in which the delivered volume flow rate is greater, in particular significantly greater, than in the opposite direction of rotation, for the same power input from the motor. In particular, the two blowers can each be designed as radial blowers with a spiral casing. Regardless of the impeller curvature (forward / reverse), this design has a preferred direction of rotation. The highest possible volume flow rate is generated in the preferred direction of rotation. If the blower impeller rotates in a spiral casing in the opposite direction to the preferred direction, a comparatively lower volume flow rate is generated.

[0020] According to a further feature of the invention, it is provided that the two blowers are each designed as drum rotor blowers and have a blower wheel with forward-curved blades.

[0021] A "drum rotor blower" is a type of radial blower. Its distinguishing feature is that the blades provided by the impeller are curved forward in the direction of rotation. The blades thus have a crescent shape, with the crescent opening in the direction of rotation. Therefore, the blades are concave with respect to their direction of rotation. This geometric design allows for a comparatively large airflow rate relative to the power input from the motor, while maintaining relatively low operating noise.

[0022] According to a first alternative of the invention, the blowers are aligned in the same direction with respect to their operating direction of rotation. According to a second alternative, however, the blowers are designed to rotate in opposite directions with respect to their operating direction.

[0023] When both blowers are oriented in the same direction, a corresponding airflow is generated by both the first and second blowers during normal use. This results in the washing tank being supplied with drying air on the one hand, and simultaneously circulated by an airflow generated by the second blower. This design offers the advantage of ensuring continuous steam protection, eliminating the need for a control system to differentiate between an open and closed wash chamber door. As long as the drying unit is in its intended use, the airflow generated by the second blower provides effective steam protection.A further advantage of this design is that improved dehumidification is achieved during a drying process of items being washed in the washing chamber, because the airflow generated by the additional blower cools the walls of the washing container.

[0024] However, a disadvantage of this embodiment is that it generates comparatively loud operating noise and requires increased motor power. For this reason, the second alternative provided by the invention is also preferred.

[0025] The second alternative provided by the invention takes advantage of the fact that a radial blower with a spiral casing (or, more specifically, a drum rotor blower) only generates a sufficient volume flow when the impeller rotates in the direction of operation. In the opposite direction of rotation, the airflow generated by the impeller is virtually zero, or at least minimized, and in particular significantly minimized, due to the blade geometry. The opposing arrangement of the two blowers thus makes it possible to operate both impellers either counterclockwise or clockwise. As a result, in both counterclockwise and clockwise rotation, one of the two blowers is driven in the direction of operation, while the other is not. Consequently, depending on the direction of rotation, the desired volume flow is generated by either one blower or the other, whereas the other blower rotates but does not generate a significant volume flow.This allows for differentiation between steam protection and dish drying, despite using only one motor unit. This offers the advantages of flexible process design, requiring comparatively low motor power, achieving increased condensation during drying, and ensuring reliable steam protection even when the dishwashing chamber door is open.

[0026] According to a further feature of the invention, the motor assembly is designed to be reversible with respect to its direction of rotation. The motor assembly can therefore be switched from counterclockwise to clockwise rotation and vice versa. As a result of switching the direction of rotation of the motor assembly, the fan wheels connected to the motor assembly are also switched. Depending on the switching position of the motor assembly, these are driven to rotate in one direction or vice versa. If the two fan wheels are designed to rotate in the same direction, they always rotate in the same direction, i.e., both either counterclockwise or both clockwise. If the two fan wheels are arranged in opposite directions, one fan wheel rotates in one direction and the other fan wheel rotates in the opposite direction. If the motor assembly is switched, the directions of rotation of the two fan wheels are also reversed accordingly.In this process, one blower wheel switches from left to right rotation, while the other blower wheel switches from right to left rotation.

[0027] The switchable design of the motor unit is particularly advantageous in the case of counter-rotating blower wheels, because it allows a distinction to be made between generating drying air on the one hand and generating an airflow to minimize vapors on the other.

[0028] According to a further feature of the invention, the motor assembly can be provided with a gearbox. This allows the motor assembly to be switched with respect to its direction of rotation. Alternatively or additionally, according to a further feature of the invention, the motor assembly can be electronically switchable. This embodiment is preferred because it allows the motor's direction of rotation, and thus also the direction of rotation of the fan wheels, to be changed selectively by electronically controlling the motor assembly.

[0029] The invention further proposes a dishwasher, in particular a household dishwasher, with a wash chamber providing a wash area and having a loading opening that can be closed by means of a door, and with a drying device of the type described above. Such a dishwasher achieves the advantages already explained above with reference to the drying device according to the invention.

[0030] According to a further feature of the invention, the drying unit is arranged on the outside of the wash tub. This provides a space-saving solution for the drying unit without impairing the wash chamber contained within the wash tub. In this context, the drying unit's fans are arranged below the wash tub in the direction of the machine's height, specifically in the base area of ​​the dishwasher. Sufficient space is available in the base area to accommodate the two fans, ensuring that the design according to the invention does not result in a detrimental reduction in the size of the wash tub.

[0031] The channels provided by the drying unit are arranged laterally to the rinsing tank, preferably on one of the two side walls that laterally define the rinsing tank. The channels extend into the base area below the rinsing tank, thus enabling a fluid-flow connection between the channels and the two blowers or to the blower that is fluid-flow connected to the channels.

[0032] According to a further feature of the invention, the air outlet of the additional blower is arranged so that air leaving the air outlet flows as a cooling air stream along an air path past an outer wall of the washing container.

[0033] The air exiting the air outlet of the secondary blower is released into the ambient atmosphere, i.e., the atmosphere surrounding the wash tank. This air acts as a cooling airflow, passing along the outer wall of the wash tank along an air path. The design of this air path is largely determined by the geometric shape of the air outlet. As a result of this design, under normal operating conditions, the wash tank is surrounded by an airflow generated by the secondary blower, with the air also passing over the top of the wash tank. On the loading side, the air passing over the top of the wash tank passes a door opening gap, which occurs when the wash chamber door is at least partially open. In the case of automatic door opening, steam can escape from inside the wash tank through this resulting door opening gap.These vapors are carried away and / or diluted by the passing airflow, thus preventing unwanted condensation on adjacent object and / or furniture surfaces.

[0034] According to a further feature of the invention, the rinsing tank is housed within a casing, with the air outlet opening into a gap between a side wall of the rinsing tank and a corresponding side wall of the casing. This gap is, for example, the gap between the casing and the rinsing tank, which houses the air ducts of the drying device. The air ducts of the drying device thus direct the airflow emitted by the additional blower towards the lid portion that forms the upper boundary of the rinsing tank. The air path described by the airflow therefore leads directly to the top of the rinsing tank and from there to the front edge that defines the loading opening of the rinsing tank.

[0035] According to a further feature of the invention, the rinsing tank is equipped with air guidance devices. Such air guidance devices serve to limit and / or, in particular, to channel the air path for the airflow emitted by the secondary blower. This enables a more targeted direction of the airflow emitted by the secondary blower.

[0036] The dishwasher also has a control device which is preferably configured to operate the motor device of the blower of the drying device in a first direction of rotation during a first phase of the drying section of a washing program, then to switch this and thus to operate the motor device of the blower of the drying device in an opposite second direction of rotation in a second phase of the drying section.

[0037] Further features and advantages of the invention will become apparent from the following description with reference to the figures. These show Fig. 1 shows a schematic perspective view of a dishwasher; Fig. 2 shows a schematic side view of the dishwasher. Fig. 1 Fig. 3 shows a schematic perspective view of a dishwasher according to the invention; Fig. 4 shows a schematic side view of the dishwasher according to the invention. Fig. 3 Fig. 5 shows a schematic representation of the further blower in part, with a blower wheel driven in the operating direction of rotation; Fig. 6 shows a schematic representation of the blower after Fig. 5with a blower wheel driven in the opposite direction of rotation; Fig. 7 in a schematic perspective view of a double blower according to the invention; Fig. 8 in a schematic view of the further blower; Fig. 9 in a schematic perspective view of the first blower; Fig. 10 in a schematic perspective view of a dishwasher according to the invention in a first operating position and Fig. 11 in a schematic perspective view of the dishwasher after Fig. 10 in a second operating position.

[0038] Fig. 1 schematic perspective view shows a dishwasher 1.

[0039] The dishwasher 1 has, in a manner known per se, a washing container 2 which provides a washing chamber 3 and which, in the intended use, serves to hold items to be cleaned.

[0040] For the purpose of hot air drying of items to be washed in the washing container 2, the dishwasher 1 has a drying device 9.

[0041] As can be seen from a synthesis, in particular the Figure 1 and 2 The drying device 9 has an intake duct 10 on one side and an outlet duct 12 on the other for guiding drying air. Furthermore, the drying device 9 has a blower 14, to which the intake duct 10 and the outlet duct 12 are fluidically connected on the air intake side.

[0042] The blower 14 of the drying device 9 is arranged in the base area 18 of the dishwasher 1, i.e. in the vertical direction 8 below the wash tub 2. The two channels, i.e. the intake channel 10 and the outlet channel 12, are arranged on the outside of the wash tub 2 on a side wall 4 of the wash tub 2.

[0043] As can be seen in particular from the presentation according Fig. 1 The washing container 2 has two side walls 4, a ceiling part 5, a bottom part 6 and a rear wall 16. Opposite the rear wall 16, a loading opening is provided through which, in the intended use, the washing container 2 can be loaded with items to be washed.

[0044] As can further be seen from a summary of the Fig. 1 and 2 As a result, the intake duct 10 of the drying unit 9 provides an air intake opening 11. Accordingly, the outlet duct 12 has an air outlet opening 13. Both openings, i.e., the air intake opening 11 and the air outlet opening 13, each open into the washing chamber 3. Therefore, in the intended use, an airflow can occur, as described in Fig. 2The arrows 17 shown indicate the direction of flow.

[0045] In accordance with the representation according to Fig. 2 In the intended use of the drying unit 9, recirculation of air takes place. The blower 14 draws drying air from the washing chamber 3 via the air intake opening 11. This drying air passes through the intake duct 10 and the blower 14 to the outlet duct 12. A tubular heating element assembly of a heating device 15 (not shown in detail in the figures) is integrated into the outlet duct. This assembly heats the drying air passing through the outlet duct 12. The heated drying air leaves the drying unit 9 via the outlet opening 13 provided by the outlet duct 12, thus returning it to the washing chamber 3.

[0046] As the Fig. 1 and 2Furthermore, it can be seen that both the intake port 10 and the exhaust port 12 each have an overlift 19 and 21 respectively, each with a partially circular channel deflection 20 and 22 respectively.

[0047] The overflows 19 and 21 each serve to prevent any water entering a channel 10 or 12 through the respective openings 11 and 13 from flowing to the blower 14. This is because any water introduced into the channels 10 or 12 through the openings 11 and 13 cannot rise against gravity thanks to the respective overflows 19 and 21, i.e., thanks to the respective channel deflections 20 and 22. Instead, it is guided back into the flushing chamber 3 through the respective openings 11 and 13 under the influence of gravity.

[0048] How in particular Fig. 2As can be seen, the blower 14 has a housing 23 and a blower wheel 24 rotatably arranged therein. Preferably, the blower 14 is a radial blower, as is also shown in the figure.

[0049] Fig. 3 a drying device 9 according to the invention or a dishwasher 1 equipped with such a drying device 9 can be identified.

[0050] The drying device 9 according to the invention not only has the already evident from the Fig. 1 and 2 not only the aforementioned blower 14, but also the further blower 25. The drying device 9 therefore has two blowers, namely a first blower 14 and a second blower 25.

[0051] The second blower 25, also called further blower 25, has an air inlet 31 and an air outlet 29 opening into the ambient atmosphere 32, as can be seen in particular from the side view according to Fig. 4This results in the following: The air outlet 29 is provided by a channel 28.

[0052] Like the first blower 14, the second blower 25 has another housing 26 and another blower wheel 27, which is rotatably mounted on the second housing 26. This relationship is also particularly evident from the illustration according to Fig. 4 .

[0053] The two blower wheels 24 and 27 are driven by a motor unit 30. This motor unit 30 is operatively connected to the two blower wheels 24 and 27 and is, as shown in particular in the illustration according to Fig. 4 As can be seen, it is arranged between the two blowers 14 and 25. The two blowers 14 and 25 are arranged side by side with the motor unit 30 interposed, forming a double blower.

[0054] The blower 14, as previously described, serves to introduce drying air into the washing chamber 3, which is housed within the washing tank 2. The second blower 25, however, serves to discharge the drawn-in air into the ambient atmosphere 32, generating an airflow that travels along an air path around the washing tank 2 to the upper front edge of the loading opening 7. When the loading opening 7 is open, any fumes escaping from the washing tank 2 can thus be diluted and carried away by the airflow generated by the second blower 25.

[0055] The Fig. 3 and 4Figure 1 shows a first alternative embodiment of the invention, in which both blowers 14 and 25 are each designed as radial blowers with a spiral housing, in particular as drum rotor blowers, and are driven in the same direction. In the intended use, a corresponding airflow is thus generated by both blowers 14 and 25, as described in the figures. Fig. 3 and 4 The arrows drawn on the map will be recognizable.

[0056] A second and preferred embodiment of the invention results from a combination of the further Figures 5 to 11 .

[0057] According to the preferred embodiment of the invention, the two blowers 14 and 25 are oriented in opposite directions to each other with respect to their operating direction, as indicated by arrow 35. The operating direction corresponding to arrow 37 results from the blades 33 of the blower wheel 27, which are curved forward with respect to the direction of rotation and thus have a concave shape with respect to the direction of movement.

[0058] Fig. 5 In this context, it can be seen that a rotational movement of the blower wheel 27 in the operating direction of rotation 35 results in a corresponding volume flow being drawn in according to arrows 34 and discharged as an airflow according to arrow 36 via the air outlet 29. Fig. 5 Arrows 34 and 36 are drawn relatively thick in accordance with the generated volume flow rate.

[0059] Fig. 6 shows in contrast to the representation according Fig. 5The blower 25 operates in the opposite direction to its operating rotation, corresponding to arrow 37. As a result of this rotational movement, only a relatively small volume of air is drawn in, corresponding to arrows 34, and discharged as an airflow, corresponding to arrow 36. From a comparison of the two Figs. 5 and 6 It follows that the full volume flow through the blower 25 is only achieved when it is driven in the operating direction of rotation 35. Otherwise, if the blower 25 is operated against the operating direction of rotation in accordance with arrow 37, only a minimized airflow is generated.

[0060] The Figs. 7, 8 and 9The figures show blower 14 and blower 25 individually as well as in an assembled position. The arrows indicate that the respective blower wheels generate their maximum volume flow when rotating in opposite directions. Blower 14 rotates clockwise (right-hand rotation) and only generates its maximum volume flow when driven in this direction. Blower 25, however, rotates counterclockwise (left-hand rotation).

[0061] In its fully assembled state, both blowers 14 and 25 are driven by a motor unit 30, as shown in the Fig. 10 and 11This can be seen. Due to the opposing orientation of the two blowers 14 and 25, depending on the direction of rotation of the motor assembly 30, either one blower or the other blower delivers the maximum volume flow, while the other blower delivers only a minimum volume flow. Thus, Fig. 10 In a first operating position of the dishwasher 1 according to the invention, it can be seen that a maximum volume flow is delivered via the additional blower 25, which is indicated by the arrows 38. The volume flow delivered by the blower 14, however, is minimized, as can be seen by the arrows 39, which are only shown as dashed lines.

[0062] Fig. 11However, it shows a reversed operating principle. The direction of rotation of the motor unit 30 is reversed, as a result of which the blower 14 generates a maximum volume flow, while the blower 25 generates only a minimum volume flow. Thus, by reversing the direction of rotation of the motor unit 30, it is easy to switch from drying operation to Fig. 11 in airflow operation to avoid fumes after Fig. 10 They can be switched and vice versa.

[0063] As well as the Fig. 10 and 11 As can be seen, the airflow generated by the additional blower 25 moves along an air path 40 that extends to the upper front edge of the feed opening 7. Vapors exiting here are diluted and / or carried away by the airflow. Reference sign

[0064] 1 Dishwasher 2 Wash tub 3 Wash chamber 4 Wash tub side wall 5 Ceiling section 6 Bottom section 7 Loading opening 8 Height direction 9 Drying unit 10 Intake duct 11 Air intake opening 12 Outlet duct 13 Air outlet opening 14 Blower 15 Heating unit 16 Rear panel 17 Arrow (direction of duct flow) 18 Base area 19 Overstroke 20 Duct deflection 21 Overstroke 22 Duct deflection 23 Housing 24 Blower wheel 25 Additional blower 26 Additional housing 27 Additional blower wheel 28 Duct 29 Air outlet 30 Motor unit 31 Air inlet 32 ​​Ambient atmosphere 33 Blade 34 Arrow 35 Arrow (direction of rotation) 36 Arrow (airflow) 37 Arrow (counter-rotational direction) 38 Arrow 39 Arrow 40 Air path

Claims

1. Drying device, in particular a recirculating air drying device, for a dishwasher, comprising an intake duct (10) providing an air intake opening (11) and an outlet duct (12) providing an air outlet opening (13), and a blower (14) to which the intake duct (10) and the outlet duct (12) are fluidically connected on the air intake side, wherein the blower (14) has a housing (23) and a blower wheel (24) rotatably arranged therein, characterized by a further blower (25) having an air inlet (31) and an air outlet (29) opening into the ambient atmosphere, wherein the further blower (25) has a further housing (26) and a further blower wheel (27) rotatably arranged therein, and by a motor device (30) which is operatively connected with the blower wheel (24) and the further blower wheel (27).

2. Drying device according to claim 1, characterized by the fact thatthe two blowers (14, 25) are arranged side by side with the motor unit (30) intermediately arranged.

3. Drying device according to claim 1 or 2 characterized by the fact that the two housings (23, 26) are designed to be separate from each other.

4. Drying device according to claim 1, 2 or 3, characterized by the fact that the two blowers (14, 25) are each designed as radial blowers with a spiral housing, in particular as drum rotor blowers, and preferably have a blower wheel (24, 27) with forward-curved blades (33).

5. Drying device according to any one of the preceding claims 1 to 4, characterized by the fact that the blowers (14, 25) are designed in the same direction with respect to their operating direction of rotation (35).

6. Drying device according to any one of the preceding claims 1 to 4, characterized by the fact that the blowers (14, 25) are designed in opposite directions with respect to their direction of operation (35).

7. Drying device according to any one of the preceding claims 1 to 6, characterized by the fact that the motor device (30) is designed to be switchable with respect to its direction of rotation.

8. Drying device according to one of the preceding claims, characterized by the fact that the motor unit (30) has a gearbox.

9. Drying device according to one of the preceding claims, characterized by the fact that the motor unit (30) has an electronically switchable motor.

10. Dishwasher, in particular household dishwasher, with a washing container (2) providing a washing chamber (3), which has a loading opening (7) that can be closed by means of a door, and with a drying device (9) according to one of the preceding claims 1 to 9.

11. Dishwasher according to claim 10, characterized by the fact that the drying device (9) is arranged on the outside of the washing container (2).

12. Dishwasher according to claim 10 or 11, characterized by the fact that the blowers (14, 25) of the drying device (9) are arranged in the machine height direction (8) below the rinsing tank (2).

13. Dishwasher according to claim 10, 11 or 12, characterized by the fact that The air outlet (29) of the further blower (25) is arranged so that the air leaving the air outlet (29) flows as a cooling air stream along an air path (40) past an outer wall of the washing tank (2).

14. Dishwasher according to any one of the preceding claims 10 to 13, characterized by the fact that the flushing vessel (2) is received by a housing, wherein the air outlet (29) opens into a gap between a flushing vessel wall and an associated housing wall.

15. Dishwasher according to any one of the preceding claims 1 to 14, characterized by the fact that the rinsing tank (2) is equipped with air guidance devices.

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