EP2117414A2 - Frontlader-geschirrspülmaschine mit wärmerückgewinnung - Google Patents
Frontlader-geschirrspülmaschine mit wärmerückgewinnungInfo
- Publication number
- EP2117414A2 EP2117414A2 EP08707691A EP08707691A EP2117414A2 EP 2117414 A2 EP2117414 A2 EP 2117414A2 EP 08707691 A EP08707691 A EP 08707691A EP 08707691 A EP08707691 A EP 08707691A EP 2117414 A2 EP2117414 A2 EP 2117414A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- dishwasher
- chamber
- supply air
- kondensatniederschlagseinrichtung
- rinsing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/48—Drying arrangements
- A47L15/488—Connections of the tub with the ambient air, e.g. air intake or venting arrangements
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/48—Drying arrangements
- A47L15/483—Drying arrangements by using condensers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/48—Drying arrangements
- A47L15/486—Blower arrangements
Definitions
- the invention relates to a dishwasher for commercial use according to the preamble of claim 1.
- Such dishwashers are used for example in large kitchens to clean dishes, glasses, cutlery, trays or similar items.
- belt transport and basket transport dishwashers are used in commercial kitchens, especially in commercial kitchens of hotels, restaurants, factory canteens, hospitals, government agencies, schools or similar institutions, and single-chamber systems.
- Such single-chamber rinsing systems are often referred to as "front loaders" and have a rinsing chamber with an openable front flap for loading and unloading the rinsing chamber with items to be rinsed in.
- Dishwashers of this type can be designed for various applications and can be used, for example, as freestanding appliances or as so-called under-counter devices.
- DE 10 2005 023 428 A1 shows a commercial dishwasher with a spray chamber for receiving items to be washed, which has a fan for generating an air flow.
- This air flow is conducted from an air inlet below the washware area, for example a gap below a flap door of the dishwasher, through the spray chamber to an air outlet, wherein a deflector device is used.
- the fan then directs the airflow to an outlet.
- the proposed dishwasher is, as described above, designed for commercial use. It is set up to clean dishes of various kinds, in particular crockery, cutlery, trays, boxes, glasses and / or similar used in the field of commercial kitchens. However, other types of items to be washed are of course applicable, for example, ware from the nursing and hospital sector.
- the dishwasher comprises a rinsing chamber with an openable front flap for loading and unloading the rinsing chamber with items to be washed.
- this front flap will have a hinge in order to be able to fold the front flap downwards, upwards or to the side, for example, thereby releasing the flushing chamber.
- other types of front flaps are conceivable.
- a combination of sliding and folding door can be provided. In this case, for example, when folding down the lower half of the door, the upper half are pushed over a linkage upwards.
- the dishwasher comprises at least one Kondensatniederschlagsein- direction, which is connected to the washing chamber and which has at least one fan for sucking or blowing out of steam and / or air from the closed washing chamber.
- This Kondensatniederschlags nowadays has at least one condensation surface for condensing vapor.
- the dishwasher further comprises a supply air duct for supplying ambient air into the rinsing chamber.
- This supply air duct is provided with a supply air blower.
- the embodiment of the dishwasher according to the invention avoids the disadvantages of the prior art described above in that for example by means of the Zu Kunststoffgebläses forced ambient air can be introduced into the washing chamber, so that a pressure equalization is ensured within the washing chamber.
- the supply air duct can in particular be designed such that contamination of this supply air duct is almost completely excluded in practice. Also leakage of liquid can be avoided by appropriate design of this supply air duct. By avoiding the problem of the formation of negative pressure within the washing chamber, for example, damage to sensitive items to be washed can be avoided.
- the Kondensatniederschlagsinnate can for example be wholly or partially received in a cover part of the washing chamber, and / or it can be a recording of condensate precipitation means (again in whole or in part) in a rear wall of the washing chamber.
- the dishwasher can be set up, for example, such that the fan and the supply air fan are operated synchronized in time.
- a corresponding control can be provided, which synchronizes these blowers in time.
- this synchronization can be carried out in such a way that the blower and the supply air blower are started simultaneously and / or with a predetermined time offset.
- the supply air blower can then be stopped, for example, at the same time or in front of the blower. This allows a residual extraction of steam from the rinsing chamber.
- the at least one supply air channel is preferably designed as an elongated channel, but also the design as a nozzle or short channel piece is possible.
- this supply air duct is arranged at least partially in the region of the rear wall of the flushing chamber.
- the supply air duct may have a supply air opening to the working environment at the back and / or the top of the washing chamber.
- the supply air duct may comprise an injection opening in the bottom region of the rinsing chamber.
- bottom area is not necessarily an arrangement in the bottom of the washing chamber itself to understand, but it is preferred an arrangement in the side walls of the washing chamber, which at the bottom of the Flushing chamber adjacent, and / or which no further than 1/3 to 1/2 of the total height of the washing chamber from the ground.
- the supply air duct can be equipped, for example, with a supply air valve.
- This supply air valve should be configured to switch quickly and to pass through large quantities of supply air, so that, for example, supply air valves (for example, spring-loaded control valves) are advantageously used.
- flow guidance devices can be provided, in particular in the region of the ceiling of the rinsing chamber. These flow guiding devices may in particular comprise flow louvers and / or perforated false ceilings.
- the condensate precipitation device can additionally be set up such that at least a partial stream of the air sucked from the rinsing chamber is returned to the rinsing chamber after it has flowed through the condensate precipitation device (and thus after at least partial drying) ,
- the condensate precipitation device may in particular comprise at least one chamber, with at least one inlet and at least one outlet, and at least one condensate drain for draining off condensate.
- this condensate drain can again lead back into the rinsing chamber, into one or more tanks of the dishwasher, or the condensate drain can be connected to a drain and / or drain.
- the blower of the condensate precipitation device may be connected to the inlet and / or the outlet of the condensate precipitation device, or may also be provided in the intermediate region, for example at a location within a flow channel of the condensate precipitation device.
- the condensate precipitation device may in particular comprise at least one cooling plate, at least one cooling plate sprayed by a cooling medium, at least one heat exchanger through which a cooling medium flows (for example a plate heat exchanger and / or a cooling coil heat exchanger) or any combination of these capacitor elements.
- the at least one capacitor element is obliquely aligned with respect to the horizontal.
- the at least one capacitor element can have a lamellar arrangement, for example an arrangement a plurality of substantially parallel cooling surfaces.
- it is also possible to provide a meander arrangement for example by several cooling surfaces being inserted into one another offset from one another. In this way, in turn, a flow channel can be defined, which also runs meandering.
- any parallel arrangement of at least two capacitor elements is conceivable.
- the Kondensatniederschlags may include, for example, one or more passive capacitor elements in the form of cooling surfaces.
- the condensate precipitation device can also have at least one water-cooled capacitor element, wherein at least one first capacitor connection of the capacitor element can be connected to a water supply, in particular a fresh water supply. It is particularly advantageous in this case if at least one second capacitor connection of the capacitor element is connected to a tank of the dishwasher, in particular with a rinsing tank. In this way, at least a portion of the heat of condensation, which has been released from the steam to the cooling water, recycled and reused, for example, to heat the Nach Hughesstattkeit accordingly.
- the dishwasher may in particular be set up to carry out a washing program.
- the dishwasher may have one or more controls, for example an electronic controller, in particular a controller which has one or more computers (for example microcomputers).
- this computer can be set up according to the program in order to carry out the washing program.
- the condensate precipitation device should be activated in at least one program step of the wash program in order to extract steam and / or air from the wash chamber (suction step).
- suction step For example, this Absaugprogramm intimid be performed at the end of the wash program.
- the fan and the supply air fan can be controlled synchronized in time.
- rinsing items taken up in the rinsing chamber in at least one rinsing program step are rinsed with a rinsing liquid from a rinsing tank.
- cooling water can be heated from the condensate precipitation device by steam and / or air from the washing chamber, wherein the heated rinse water is passed into the final washing tank.
- heat is partially recovered and a subsequent The following heating up of rinsing water can be shortened in time. As a result, energy is saved, and the dishwashing cycle of the dishwasher can be further shortened.
- the post-rinse tank may have a two-level control, wherein the post-rinse program step is carried out, for example, until the level in the post-rinse tank has reached a lower level.
- the level in the final rinse tank can be raised again, until the upper level is reached again.
- other program designs are conceivable.
- a liquid valve for controlling a supply of the cooling medium can also be provided.
- the dishwasher is advantageously arranged such that the operation of this liquid valve and the operation of the fan (and possibly also the operation of the Zu Kunststoffgebläses) are performed synchronized in time.
- an opening of the liquid valve and a start of the blower can take place substantially simultaneously.
- a stop of these two elements can in turn be synchronized in time, but preferably the fan has a certain amount of caster.
- Figure 1 is a front view of an embodiment of an inventive
- Figure 2 is a sectional side view of the embodiment of the dishwasher according to Figure 1;
- FIGS. 3A to 3D show various embodiments of condensate precipitation devices
- Figures 4A and 4B show two embodiments of a capacitor element with a liquid cooling
- FIG. 5 shows an exemplary embodiment of a condensation precipitation device with partial recycling of the dried air to the rinsing chamber
- FIG. 6 shows an embodiment of a fluid system of a preferred dishwasher in a schematic representation.
- FIGS. 1 and 2 show an exemplary embodiment of a dishwasher 110 according to the invention in a schematic representation.
- the dishwasher 110 is designed as a front loader and has a rinsing chamber 112 with a housing 114.
- the housing 114 has on its front side a front flap 116, which in this embodiment can be folded down to load the rinsing chamber 112 with dishes to enable.
- This loading can be done either directly by washing items is introduced into appropriate receptacles within the washing chamber 112, or it can be done via Spülgutkörbe. Wash ware and the corresponding facilities are not shown in Figures 1 and 2.
- the dishwasher 110 has a cover part 118, which is designed as condensate precipitation device 120. Furthermore, in this exemplary embodiment, the dishwasher has on its rear wall (that is to say the side opposite the front flap 116) via a supply air channel 122.
- This supply air channel has an inlet air opening 124 on the top side of the dishwasher 110. In the area of this supply air opening 124, a supply air blower 126 is received in the supply air duct 122.
- the supply air channel 122 opens at an injection opening 128 into the rinsing chamber 112.
- This injection opening 128 is arranged in the lower region of the rinsing chamber 112, that is directly above a liquid level of a washing tank 130, which is received below the rinsing chamber 112.
- a spring-loaded supply air flap 132 is furthermore arranged in this embodiment, which as Flow valve can serve and which, for example, difficult escape of steam waves from the washing chamber 112 in the working environment.
- the condensate precipitation device 120 has a chamber 134 with an inlet 136 and an outlet 138.
- the outlet is arranged on the upper side of the dishwasher 110, but alternatively or additionally, as indicated for example in FIG. 1, the outlet 138 could also be arranged laterally on the dishwasher 110.
- a capacitor element 140 is arranged in the embodiment shown in Figure 2, which is a simple cooling plate 142 with condensation surfaces 144 in this simple embodiment.
- a flow channel 146 is defined within the Kondensatnieder Kunststoffs Rhein 120.
- a blower 148 is arranged, which is preferably, as described above, synchronized with the supply air blower 126 is operated.
- the condensate precipitation device 120 has a condensate drain 150. Via this condensate drain 150, condensate from the condensate precipitation device 120 can flow directly into the wash tank 130 in this exemplary embodiment. Alternatively, a drain could also be provided, or, as described in more detail below, condensates could be transferred to a final rinse tank.
- a flow guidance device 152 is provided, which is designed, for example, as a perforated ceiling plate. This perforated ceiling plate serves to homogenize air flows within the chamber 112, to accomplish in this way a more uniform drying of the dishes.
- the blower 148 of the Kondensatniederschlags coupled 120 and the Zu povertygebläse 126, as described above, preferably operated synchronized. In this way, steam and / or moist air from the rinsing chamber 112 can be sucked into the chamber 134 of the Kondensatniederschlags owned 120 without the required pressure equalization by leaks in the housing 114 of the washing chamber 112 would have to be made (for example, a gap below the front door 116).
- the condensate sinker provides reliable dehumidification of the air from the wash chamber 112 before it is released into the work environment. FIGS.
- 3A to 3D show various alternative exemplary embodiments of the condensate precipitation device 120, which can be used as an alternative to the exemplary embodiment according to FIG. It should be noted that in addition to a formation of the condensate precipitation device 120 in the cover part, an analog configuration on the back of the flushing chamber 112 (that is, in a vertical orientation) is conceivable.
- the arrangement in Figure 3A shows a meander arrangement of passive, that is not liquid-cooled in this example cooling plates 142 with condensation surfaces 144. These are inclined (ie inclined to the horizontal) and thereby allow drainage of the condensate to the condensate drain 150.
- a spigot of the inlet 136 may be provided with a rim 154 which extends into the chamber 134 to prevent drainage of the condensate into the inlet 136.
- the embodiment of the Kondensatnieder- striking device 120 substantially corresponds to the Kondensatnieder Kunststoffs worn 120 according to the embodiment in Figure 2.
- An exhaust air stream 156 flows through the flow channel 146 of the chamber 134 in a meandering flow, wherein the condensation surfaces 144 of the capacitor plates 142 are repeatedly flowed over. Furthermore, in the exemplary embodiment according to FIG. 3A, an outflow 158 is provided in which the condensate can run off. This embodiment is, as described above, optional.
- FIG. 3B shows an exemplary embodiment of a condensate precipitation device 120, which essentially corresponds in its function and structure to the example according to FIG. 3A, but in which the cooling plates 142 are sprayed with cooling liquid via spray elements 160, for example with cold water.
- This cooling liquid together with the condensate, drains off into the condensate drain 150 and can either be fed to a waste water connection or, alternatively or additionally, to one or more tanks of the dishwasher 110.
- the spraying of the cooling plates 142 with cooling fluid thus represents an intermediate step between a passive embodiment of the capacitor elements 140 and an active embodiment and increases the efficiency of the precipitation of the condensate in the exhaust air flow 156 to be dehumidified.
- FIG. 3C shows a further exemplary embodiment in which there is likewise a modification of the condensate precipitation device 120 shown in FIG. 3A.
- cooling plates 142 which inclined to the horizontal (for example, at an angle of about 2 to 10 °, preferably about 5 °, as in the other embodiments also) are introduced into the chamber 134.
- the cooling plates 142 are configured as perforated cooling plates, each having one or more openings 162 through which the air 156 to be dehumidified flows from the inlet 136 to the outlet 138 can.
- the embodiments according to FIGS. 3A and 3C can also be combined, so that, for example, openings 162 can also be provided in the cooling plates 142 in the meandering arrangement according to FIGS. 3A and 3B.
- the condensate precipitation device 120 again has a chamber 134, for example inclined to the horizontal, with an inlet 136 and an outlet 138, a condensate drain 150 and a condensing element 140 However, no passive cooling of the capacitor element 140 provided, but a cooling via cooling coils 164.
- the capacitor element 140 There are various ways to design the capacitor element 140, which are shown for example in Figures 4A and 4B.
- the capacitor element 140 is configured as a pure cooling coil 164, with a first capacitor connection 166 for supplying cooling liquid and a second capacitor connection 168 as the outlet of the cooling liquid.
- the cooling coil 164 thus forms a heat exchanger 170, in which a quantity of heat is transferred from the air to be dehumidified 156 to the cooling liquid of the heat exchanger 170.
- the heat exchanger 170 of the condenser element 140 is designed as a plate heat exchanger 172 with flat condensation surfaces 144.
- cooling coils 164 can again be provided which, for example, are again passed meander-shaped through the heat exchanger 170 , or plates can also be completely and homogeneously flowed through by the cooling medium.
- heat exchangers alternative to the embodiments of the capacitor elements 140 shown in FIGS. 3D and 4A, 4B, are also possible. Combinations of the illustrated heat exchangers 170 with other types of capacitor elements 140, for example with passive cooling plates 142, are also conceivable.
- the fan 148 is arranged in the region of the outlet 138.
- this blower 148 can also be configured alternatively, for example, not directly connected to the chamber 134 of the condensate precipitation device 120, but rather via one or more pipes.
- blower 148 should be dimensioned and designed such that the greatest possible flow through the condensate precipitation device 120 is effected with exhaust air 156 from the rinsing chamber 112, wherein the amount of air should in each case be adapted to the ability to separate condensate on the capacitor elements 140.
- blower 148 may also be connected to the inlet 136 of the condensate precipitation device 120.
- this fan 148 may also be arranged in the flow channel 146 (for example in the meander-shaped configuration according to FIG. 3A) between the cooling plates 142.
- this fan 148 may also be provided, but this increases the design effort and operating costs.
- an exemplary embodiment of the condensate precipitation device 120 is shown in FIG. 5, which both sucks air from the purge chamber 112 and leads via capacitor elements 140.
- these capacitor elements 140 are again designed as cooling plates 142, which, however, are not arranged horizontally but vertically in this exemplary embodiment.
- the condensate precipitation device 120 can also be configured as a horizontal condensate precipitation device.
- cooling plates 142 other embodiments are conceivable, alternatively or additionally, for example, in turn, the embodiments with heat exchangers 170 described above.
- the flow passage 146 divides. While a portion of the air 156 is discharged into the working environment via the outlet 138, overflow a recirculation 176 a partial flow back into the rinsing chamber 112 and there supports the pressure equalization, to then be returned via the suction in the inlet 136 of Kondensatntschsein- device 120 again. In this way, at least a partial flow of the air 156 is repeatedly passed over the capacitor elements 140. In addition to the support of the pressure compensation, this embodiment thus causes a further reduction of the fired steam released into the working environment.
- the ratio between recycled Partial flow and ejected partial flow can be determined, for example, via the opening cross sections of the outlet 138 and the return 176 and can be adjusted, for example via one or more slides and / or valves, to effect optimal drying.
- FIG. 6 schematically shows a preferred embodiment of the dishwashing system of the dishwasher 110, including the condensate precipitation device 120.
- a heat exchanger 170 is provided in the condensate precipitation device 120, which is represented here symbolically in the form of a cooling coil 164.
- air 148 from the rinsing chamber 112 (here indicated only symbolically) is conducted via the heat exchanger 170 by means of the blower 148 in order finally to be discharged into the environment via the outlet 138.
- the flushing chamber 112 opens at an injection opening 128 of the supply air channel 122, in which the supply air blower 126 is arranged.
- a wash tank 130 which is arranged for example in the bottom region of the washing chamber 112, or which is designed as a separate tank.
- the heat exchanger 170 may, for example, be designed according to one of the embodiments in FIGS. 4A or 4B. Alternatively, however, it is also conceivable to use the condensate precipitation device 120 in the "semi-active" configuration according to FIG. 3B, in which a first condenser connection 166 of the heat exchanger 170 is connected to a cold water connection 178.
- the second condenser connection 168 is preferably via a free outlet 180 (FIG. for example via a freewheeling path) with a final washing tank 182 of the dishwasher 110.
- the inflow of fresh water via the cold water connection 178 into the heat exchanger 170 can be controlled via a liquid valve 184, for example a solenoid valve.
- the final rinse tank 182 is preferably configured in this embodiment as a two-level tank, with an upper level sensor 186 and a lower level sensor 188.
- the post-rinse tank 182 is connected via a pump 190 and a piping 192 to a spray system 194 for loading the ware.
- the dishwasher 110 may have a controller 196, which may be configured, for example, as described above, that is to say in particular may comprise one or more computers, and which is preferably set up by the program in order to carry out a rinsing program.
- the controller 196 may interrogate information from the level sensors 186, 188 drive the pump 190 and can control the liquid valve 184 and the blower 148 and / or 126.
- a post-rinse program step may first be carried out, in which (for example, following one or more rinsing steps, in which the dishwasher 110 is operated in the circulation mode), the dishes in the rinsing chamber 112 with rinsing liquid from the rinsing tank 182 is rinsed.
- the level of the final rinse liquid in the final rinse tank 182 may drop from the level of the upper level sensor 186 to the level of the lower level sensor 188.
- the pump 190 is preferably automatically stopped by the controller 196.
- the liquid valve 184 is preferably closed.
- the blower 148 can be started in an extraction program step and (simultaneously or preferably only slightly delayed in time) the supply air blower 126. Furthermore, the liquid valve 184 can also be opened (likewise simultaneously or preferably only slightly later). In this case, cooling water flows through the heat exchanger 170, and condensate deposition on the heat exchanger 170 can take place. As a result, air sucked in from the rinsing chamber 112 is at least partially dehumidified before it is released again into the environment.
Landscapes
- Washing And Drying Of Tableware (AREA)
- Magnetic Heads (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007007133A DE102007007133A1 (de) | 2007-02-13 | 2007-02-13 | Frontlader-Geschirrspülmaschine mit Wärmerückgewinnung |
PCT/EP2008/001079 WO2008098745A2 (de) | 2007-02-13 | 2008-02-13 | Frontlader-geschirrspülmaschine mit wärmerückgewinnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2117414A2 true EP2117414A2 (de) | 2009-11-18 |
EP2117414B1 EP2117414B1 (de) | 2011-01-19 |
Family
ID=39529422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08707691A Not-in-force EP2117414B1 (de) | 2007-02-13 | 2008-02-13 | Frontlader-geschirrspülmaschine mit wärmerückgewinnung |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090038661A1 (de) |
EP (1) | EP2117414B1 (de) |
CN (1) | CN101610707B (de) |
AT (1) | ATE495696T1 (de) |
DE (2) | DE102007007133A1 (de) |
WO (1) | WO2008098745A2 (de) |
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-
2007
- 2007-02-13 DE DE102007007133A patent/DE102007007133A1/de not_active Ceased
-
2008
- 2008-02-13 AT AT08707691T patent/ATE495696T1/de active
- 2008-02-13 CN CN2008800046050A patent/CN101610707B/zh not_active Expired - Fee Related
- 2008-02-13 US US12/030,761 patent/US20090038661A1/en not_active Abandoned
- 2008-02-13 EP EP08707691A patent/EP2117414B1/de not_active Not-in-force
- 2008-02-13 DE DE502008002384T patent/DE502008002384D1/de active Active
- 2008-02-13 WO PCT/EP2008/001079 patent/WO2008098745A2/de active Application Filing
Non-Patent Citations (1)
Title |
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See references of WO2008098745A2 * |
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US20090038661A1 (en) | 2009-02-12 |
ATE495696T1 (de) | 2011-02-15 |
DE502008002384D1 (de) | 2011-03-03 |
WO2008098745A3 (de) | 2009-01-22 |
CN101610707A (zh) | 2009-12-23 |
DE102007007133A1 (de) | 2008-08-14 |
EP2117414B1 (de) | 2011-01-19 |
CN101610707B (zh) | 2012-02-15 |
WO2008098745A2 (de) | 2008-08-21 |
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