EP3447390A1 - Cooking device, in particular commercial cooking device - Google Patents

Abstract

The invention relates to a cooking appliance (1), in particular a commercial cooking appliance, having a housing (2) in which a cooking chamber (3) is arranged, and which is provided with a housing drain (4), with a condenser connected to the cooking chamber (4). 3), with a cooling water supply device, and with a device drain (9), the condenser (5) having a multi-chamber system, and wherein the cooling water supply device (10) has at least one supply line (11) in the chamber (8), which is provided with the device outlet (9), wherein the supply line (11) is aligned with an opening region (12) of the device outlet (9).

Description

The invention relates to a cooking appliance, in particular in the form of a commercial cooking appliance, according to the preamble of claim 1.

Such a cooking appliance is from the DE 10 2012 221 857 A1 known.

Since waste water may be discharged into the sewer system only up to certain temperature limits, such as 65 ° C, according to appropriate regulations that may vary from country to country, it is necessary to appropriately cool the water bath collecting in the condenser of the cooking appliance. The generic cooking appliance has for this purpose a water jet pump, the delivery pipe opens below the water surface of the water bath. In the generic device cooling air is also introduced into the condenser, which makes additional cooling of the water bath in the condenser possible.

From the DE 89 02 903.8 Another cooking appliance is known in which cold water is introduced via a water nozzle at high pressure into a main pipe, which is connected to the cooking chamber, to suck vapor from the cooking chamber and to be able to degrade immediately. The extracted and extinguished vapors are then discharged through a drain.

Investigations carried out in the context of the invention have shown that, although it is possible by these methods to cool the condenser, partially heated water bath to the extent that the set limits are not exceeded, but in previously known cooking appliances for security reasons very high amounts of water be initiated, which greatly increases the water consumption of previously known cooking appliances and accordingly drives the operating costs in the air.

It is therefore an object of the present invention to provide a cooking appliance specified in the preamble of claim 1 way, on the one hand it ensures that limits are not exceeded for dischargeable wastewater in sewage systems, on the other hand, however, makes a reduction in water consumption possible.

The solution of this object is achieved by the features of claim 1.

The cooking appliance according to the invention is initially distinguished by a condenser with a multi-chamber system, which in a particularly preferred embodiment comprises a first, second and third chamber. The first chamber is in this case flow-connected via a housing outlet with the cooking chamber and provided with a first water mask.

The second chamber connects to the first chamber, is connected to the flow and has a second water mask on. The third chamber in turn connects to the second chamber and is also fluidly connected to this, has a third water mask and is connected to a device drain, which projects to the level of the third water mask in the third chamber. In this case, the device drain discharges into the sewage system into which the waste water of the cooking appliance has to be introduced, whereby, as explained above, certain temperature limit values must not be exceeded.

To ensure this, in contrast to the above-described prior art, which teaches the cooling water supply in the directly connected to the cooking chamber chamber of the condenser, the feed line of the cooling water supply device opens in the chamber of the multi-chamber system, which is connected to the device sequence. Because further investigations carried out within the scope of the invention have shown that the inflow of the supply line in this chamber allows the water supply to be controlled and regulated much more effectively, thus ensuring that the temperature limits of the waste water introduced into the sewage system can be maintained and, on the other hand, the water consumption can be significantly reduced compared to previous systems by the better controllability.

The water consumption is also favorably influenced by the fact that in a condenser with a multi-chamber system from the chamber, which is flow-connected to the cooking chamber, to the chamber, which has the device drain, the temperatures decrease, which would mean for example in N-chambers : $$\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="imgf0001.png"\; state="\{\{state\}\}">T</figure-callout>}\mathrm{1}>\mathrm{<figure-callout\; id="2"\; label="T"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">T</figure-callout>}\mathrm{2}>\mathrm{<figure-callout\; id="3"\; label="T"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">T</figure-callout>}\mathrm{3}>\mathrm{<figure-callout\; id="4"\; label="T"\; filenames="imgf0001.png"\; state="\{\{state\}\}">T</figure-callout>}\mathrm{4\; ...}>\mathrm{TN}$$

The dependent claims have advantageous developments of the invention to the content.

In particular, in a particularly preferred embodiment, it is possible to introduce the supply line into the third chamber so that it projects into the mouth region of the device outlet. This is particularly advantageous in the event that over a Dirt pump, which is preferably designed with a vent function, dirty water from the first chamber of the condenser is introduced directly into the device drain. The fact that in this embodiment, the cooling water supply line protrudes into this device drain, it is possible to make a pre-cooling of the device drain and the subsequent sewage system by pumping cooling water is introduced before the introduction of dirty water in the device drain and beyond can in a further particularly preferred embodiment, in this arrangement, a mixing device, for example in the form of a baffle plate, are arranged in the device sequence. This mixing device makes it possible to evenly mix the supplied hot waste water with the introduced cooling water, which makes it easier to lower the temperature limit to be complied with and, above all, makes it possible faster.

In order to further perfect the control of the cooling water supply, it is possible to provide temperature sensors at different points of the system. In particular, a temperature sensor can be provided in the device drain, in particular in the mixing device. Furthermore, it is possible to provide temperature sensors in the first and / or third chamber.

In a further particularly preferred embodiment, a temperature sensor may further be provided in the supply line of the cooling water supply device.

This makes it possible to accurately calculate the amount of water using the energy conservation law M1 × T1 × (T1-TM) = M2 × T2 × (TM-T2), which further perfects the reduction of the cooling water consumption.

Furthermore, it is possible to provide the third chamber and / or the connecting piece with a thermal insulation in order to reduce an increased heat input by heat radiation, which may for example result from the cooking chamber. Here, the chamber and / or the connecting piece may be made of a poor thermal conductivity material. In addition, it is possible to additionally provide such a connection piece or a chamber produced in this way with an insulating layer.

In order to control the water consumption in a suitable manner, the method according to the invention can define a sequential sequence which determines a water cooling for a certain period of time, whereafter the hot water supply can be activated. For this purpose, the cooking appliance according to the invention may be provided with a control / regulating device which receives signals from the existing temperature sensors or other sensors on the one hand and on the other hand to be controlled or regulated components of the system, such as different pumps, shut-off valves or valves corresponding to sensed signals. The sensors are mainly to temperature sensor and the components to be controlled, as explained above, to shut-off valves, valves, circulation pumps, dirt pumps, the steam generator, the motor of the fan and / or the heater.

In an alternative embodiment, it is possible to adjust the water volume flows of cooling water and hot water with the aid of the previously described temperature sensor on the law of conservation of energy.

Fig. 1

eine schematisch vereinfachte Darstellung eines erfindungsgemäßen Gargeräts gemäß einer ersten Ausführungsform,

Fig. 2

eine der Fig. 1 entsprechende Darstellung einer zweiten Ausführungsform, und

Fig. 3

eine der Fig. 1 und 2 entsprechende Darstellung einer dritten Ausführungsform.

Further details, advantages and features of the present invention will become apparent from the following description of exemplary embodiments with reference to the drawing. It shows:

Fig. 1

a schematically simplified representation of a cooking appliance according to the invention according to a first embodiment,

Fig. 2

one of the Fig. 1 corresponding representation of a second embodiment, and

Fig. 3

one of the Fig. 1 and 2 corresponding representation of a third embodiment.

Fig. 1 shows a first embodiment of a cooking appliance according to the invention 1. The cooking appliance 1 has a housing 2, in which a cooking chamber 3 is arranged. This cooking chamber 3 can be opened and closed by a cooking chamber door not shown in detail in the figure. The cooking chamber 3 is provided with a housing outlet 4, which may be formed as a drain pipe, which opens into a first chamber 6 of a capacitor 5.

As Fig. 1 clarifies, in the cooking chamber 3 also a fan 20 is arranged, which can be rotated by a motor 21 in rotation.

Behind the fan 20, a Frischluftzuführrohr 30 opens into the cooking chamber 3, in which a dehumidifier flap 22 is arranged.

The condenser 5 is designed as a condenser with a multi-chamber system, which in the illustrated example is a three-chamber system. Accordingly, in the illustrated example, the condenser 5 has a first chamber 6, which contains a first water reservoir W1 with a level N1, and a second chamber 7, which adjoins the first chamber 6 and by means of an overflow, for example an overflow plate 37 the first chamber 6 is separated, but also fluidly connected with this.

The second chamber 7 has a second water reservoir W2 with a level N2 and is fluidly connected to a third chamber 8 via a connecting pipe 38.

The third chamber 8 has a third water reservoir W3 with a level N3 and is provided with an odor trap 24.

Furthermore, a device drain 9, for example in the form of a drain pipe, projects into the third chamber 8 up to the level of the level N3. Finally, the third chamber 8 has a safety overflow 23.

The first chamber 6 is connected via a dirt line 28, in which a dirt pump 27 is preferably arranged with dehumidifying function, with the device drain 9 fluidly connected.

The second chamber 7 is connected via a circulation line 26, in which a circulation pump 25 is arranged, with the cooking chamber 3 fluidly connected.

The third chamber 8 is further provided with a temperature sensor 16.

As a further component, the cooking appliance according to the invention according to the embodiment of Fig. 1 a cooling water supply device 10, which includes, for example, a supply line 11, which opens in the third chamber 8, in the exemplary case above the level N3. In the supply line 11, a shut-off device, preferably in the form of a valve 18, is provided, with which the supply of cooling water via the supply line 11 can be controlled or regulated.

In Fig. 2 a second embodiment of the cooking appliance 1 according to the invention is shown, in which all components structurally and functionally those of Fig. 1 are identified with the same reference numerals. In that regard, to the above description of the Fig. 1 Be referred. The embodiment of the cooking appliance 1 further comprises a steam generator 31 which is fluidly connected via a steam line 36 to the cooking chamber 3.

The steam generator 31 also has an openable and closable shut-off device for supplying water, which may be designed, for example, as a valve 33.

Further, the steam generator 31 via a pumping line 35, in which a pump 34 is disposed, fluidly connected to the third chamber 8, wherein the pumping line 35 in this case 9 opens in the device outlet. As a result, particles from the steam generator can be passed directly into the device drain 9.

In this embodiment, the first chamber 6 is provided with a temperature sensor 15, wherein also in the supply line 11, a temperature sensor 17 and the device outlet 9, a temperature sensor 14 is provided.

Should be in the embodiments according to Fig. 1 and 2 Wastewater are introduced into a sewer system, via the cooling water supply device 10 depending on the amount and temperature of the dissipated heated wastewater cooling water in the third chamber. 8 initiated, it being possible, for example, before the supply of dirty water via the dirt line 28 cooling water into the third chamber 8 to pre-cool the device drain 9 and to initiate the heated waste water in the cooling water flow to the desired lowering of the temperature on safe Way to make it possible.

The third embodiment of the cooking appliance 1 according to the invention Fig. 3 corresponds substantially to the embodiment according to Fig. 2 , in turn, all structurally and functionally corresponding components in Fig. 3 with the same reference numerals as in Fig. 2 Marked are. In that regard, to the description to Fig. 2 Be referred.

In the embodiment according to Fig. 3 However, it is provided that the supply line 11 projects into an opening region 12 of the device outlet 9, ie at least approximately at the level of the level N3. Furthermore, the supply line 11 may be provided with a nozzle which can inject cooling water directly into the device outlet 9. Here, the supply line 11 may end above the mouth region 12 in the third chamber 8.

Further, in this embodiment, a mixing device 13 is provided as a particularly preferred feature, which is provided in the device drain 9 below the discharge point of the dirt line 28. This mixing device 13 may be formed, for example, as a baffle plate, which is fixable via a suitable fastening device 19 in the device outlet 9. The temperature sensor 14 provided in the device outlet 9 may alternatively be arranged on the mixing device or the baffle plate 13. The cooking appliance 1 of the embodiment according to Fig. 3 is further provided with a temperature sensor 32 mounted on the steam generator 31.

If hot water from the steam generator 31 and / or introduced via the dirt line 28 in the device drain 9, it is preferably possible in this embodiment, prior to the introduction of hot water in the device drain 9 vorzukühlen this by the supply line 11 cooling water in the third Chamber and thus in the device sequence 9 initiates. Then it is possible to introduce hot water from the steam generator 31 and / or the dirt line 28 in the device drain 9, wherein the mixing device 13 further improves the mixing of hot water and cooling water, which further improves the lowering of the temperature limit to be maintained and especially the lowering time reduced.

If the temperature in the first chamber 6 is very high and the cooling water to be supplied relatively warm, the pump 27 and / or 34 can be clocked accordingly for a sufficient cooling of the waste water to be discharged to the water volume flows to Cooling wastewater and the cooling water to adapt so that according to the Energy Conservation Act, the water temperature of the water to be discharged does not exceed the legal limits.

As explained above, this can be provided for a control / regulating device, which is representative of all embodiments according to the Fig. 1 . 2 or 3 in Fig. 1 symbolized by the block 40. This controller 40 can be used with all sensors provided in the system, as in the example case Fig. 1 are in signal communication with the sensor 16 and control the respective components to be controlled or regulated as in the example case, the pumps 25, 27 and the obturator 18 or regulate.

It should also be noted that in the illustrated example cases, the water templates W1, W2 and W3 each have different levels. However, it is also possible that the levels of the three water templates W1, W2 and W3 are the same.

Furthermore, the term "cooking appliance, in particular commercial cooking appliance" is understood to mean any type of food processing appliance. These may accordingly be with hot air and / or steam-driven cooking appliances (combi steamers), grills, microwave ovens and conventional electric ovens, as well as coffee machines, vending machines and / or ice machines.

In addition to the above written description of the invention is to the additional disclosure hereby explicitly to the drawings of the invention in the Fig. 1 to 3 Referenced.

LIST OF REFERENCE NUMBERS

1

Cooking appliance

2

casing

3

oven

4

Housing drain / cooking chamber drain

5

capacitor

6

first chamber

7

second chamber

8th

third chamber

9

unit drain

10

Cooling water supply device

11

feed

12

mouth area

12 '

heater

13

Mixer / flapper

14, 15, 16, 17, 32

temperature sensor

18

Shut-off device / valve

19

holder

20

fan

21

engine

22

Entfeuchterklappe

23

Safety overflow

24

trap

25

circulating pump

26

circulation line

27

Dirt pump, preferably with dehumidifying function

28

dirt line

29

exhaust pipe

30

Fresh air supply pipe

31

steam generator

33

openable and closable shut-off device

34

pump

35

evacuation line

36

steam line

37

overflow

38

connecting pieces

39

Heating device of the cooking chamber 3

40

Control / regulating device

W1-W3

water templates

N1-N3

Height / level of water templates W1 to W3

Claims (13)

Cooking appliance (1), in particular commercial cooking appliance, with a housing (2), • in which a cooking chamber (3) is arranged, and • which is provided with a housing outlet (4), with a condenser connected to the cooking chamber (3), with a cooling water supply device, and with a device drain (9), - wherein the capacitor (5) comprises a multi-chamber system, and - wherein the cooling water supply device (10) has at least one supply line (11) which opens into the chamber (8) which is provided with the device outlet (9), characterized in that the supply line (11) is aligned with a mouth region (12) of the device outlet (9). Cooking appliance according to claim 1, characterized in that a mixing device, in particular in the form of a baffle plate (13), is arranged in the appliance outlet (9). Cooking appliance according to one of claims 1 or 2, characterized in that the device outlet (9) is provided with a temperature sensor (14). Cooking appliance according to claim 2 and 3, characterized in that the temperature sensor (14) on the mixing device, in particular the baffle plate (13) is arranged. Cooking appliance according to one of claims 1 to 4, characterized in that the first chamber (6) is provided with a temperature sensor (15). Cooking appliance according to one of claims 1 to 5, characterized in that the third chamber (8) is provided with a temperature sensor (16). Cooking appliance according to one of claims 1 to 6, characterized in that the supply line (11) is provided with a temperature sensor (17). Cooking appliance according to one of claims 1 to 7, characterized in that the supply line (11) is provided with an openable and closable obturator (18). Cooking appliance according to one of claims 3 to 8, characterized in that the cooling water supply via at least one of the temperature sensor (14, 15, 16, 17, 32) can be controlled or regulated. Cooking appliance according to one of claims 1 to 9, characterized in that the third chamber (8) is thermally insulated. Cooking appliance according to one of claims 1 to 10, characterized in that the capacitor (5) as a multi-chamber system has a three-chamber system with the following components: A first chamber (6), which is flow-connected via the housing outlet (4) to the cooking chamber (3) and which has a first water reservoir (W1), A second chamber (7) adjoining the first chamber (6) and having a second water reservoir (W2), and A third chamber (8), which adjoins the second chamber (7), has a third water reservoir (W3) and which is connected to the device outlet (9) whose position in the third chamber (8) is the level ( N3) of the water template (W3). Cooking appliance according to one of claims 1 to 11, characterized in that a connection piece (38) between the chamber (8), which is connected to the device outlet (9), and the chamber (7), seen in the flow direction in front of the chamber ( 8) with the device outlet (9) is arranged, is thermally insulated. Cooking appliance according to one of claims 1 to 12, characterized by a control / regulating device (40) for the control or regulation of controllable or controllable components (14, 15, 16, 17, 32, 18, 25, 26, 27) of Cooking appliance (1).

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