CN108392090B - Steam generator and steam cooking device - Google Patents
Steam generator and steam cooking device Download PDFInfo
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- CN108392090B CN108392090B CN201810517205.5A CN201810517205A CN108392090B CN 108392090 B CN108392090 B CN 108392090B CN 201810517205 A CN201810517205 A CN 201810517205A CN 108392090 B CN108392090 B CN 108392090B
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- 238000010411 cooking Methods 0.000 title claims abstract description 70
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- 238000010438 heat treatment Methods 0.000 claims abstract description 87
- 238000005086 pumping Methods 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 95
- 238000001914 filtration Methods 0.000 claims description 52
- 238000009833 condensation Methods 0.000 claims description 28
- 230000005494 condensation Effects 0.000 claims description 28
- 238000004886 process control Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 25
- 238000007599 discharging Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 239000011797 cavity material Substances 0.000 description 55
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 235000013305 food Nutrition 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
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- 238000002309 gasification Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
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- 229920006395 saturated elastomer Polymers 0.000 description 2
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
- A47J2027/043—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels for cooking food in steam
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
Abstract
The invention discloses a steam generator and a steam cooking device, wherein the steam generator comprises: the steam boiler (1), the waterway assembly (2) and the unit controller. Wherein the steam boiler (1) comprises a boiler heating element (17); -the waterway assembly (2) comprises a water pump (21) pumping fluid or pumping fluid to the steam boiler (1); the unit controller is used for controlling the boiler heating power of the steam boiler (1) and the pumping power of the water pump (21). The steam generator is integrated with the waterway assembly with the water pump and the unit controller for controlling the pumping power and the heating power, so that the steam generator has an integrated modularized effect, and related parameters are accurately controlled by the unit controller with the module, so that the effect of quickly discharging steam of the steam generator is realized, and the modularized structure is more beneficial to improving the miniaturization and universalization effects of the steam generator.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a steam generator and a steam cooking device.
Background
In the existing household steam cooking device, a steam generator is generally a common steam boiler for heating water to generate steam, and is mainly divided into two modes of internal or external cooking cavities. The internal steam generator is usually arranged at the bottom wall of the cooking cavity and directly heats the cooking water to generate steam, and the external steam generator is usually arranged at the outer wall of the cavity and continuously introduces the generated steam into the cooking cavity through a steam guide pipe and the like to cook food.
In the current home steam cooking devices, such as steam ovens, the duration of steam generation in the cooking cavity is long, so that the waiting time for cooking food is also relatively long. According to the principle of steam generation, there are mainly two types: one is water storage, which is to directly introduce water into a steam boiler and gradually burn the water to boiling to generate steam, and the mode usually takes about 1 minute; in another type of steam boiler, the heating element is a cast part, and the cast part is heated to a certain temperature of 100 ℃ or above, and then water is sprayed to the cast part to generate steam, which generally takes about 30 seconds, so that the waiting time for cooking is long.
Meanwhile, as the inner cavity and the outer wall of the cooking cavity are cold environments, the temperature in the cavity is low, so that the cooking time is prolonged, in addition, when the steam meets the outer wall of the cooking cavity with low temperature, water drops are easily formed and directly drop on food to be cooked, the cooking effect is poor, and finally the user experience is poor.
Disclosure of Invention
The invention aims to provide a miniaturized and modularized steam generator capable of rapidly discharging steam.
In order to achieve the above object, the present invention provides a steam generator comprising:
a steam boiler comprising a boiler heating element;
a waterway assembly including a water pump to pump fluid or pump fluid to the steam boiler; and
and the unit controller is used for controlling the boiler heating power of the steam boiler and the pumping power of the water pump.
Preferably, the steam generator comprises a box body, and the steam boiler, the waterway assembly and the unit controller are all arranged in a box cavity of the box body.
Preferably, the box body is a rectangular box, the unit controller and the waterway assembly are vertically stacked, and the steam boiler, the unit controller and the waterway assembly which are vertically stacked are arranged along the length direction of the box cavity.
Preferably, the length of the box body is not more than 250mm, the width is not more than 100mm, and the height is not more than 100mm.
Preferably, the steam generator includes a circuit board assembly electrically connected with the boiler heating element, and a thyristor unit for controlling a boiler heating power of the boiler heating element is integrated in the circuit board assembly.
Preferably, the waterway assembly comprises a waterway plate, and the water pump comprises a water inlet pump and a water suction pump, wherein the water inlet pump and the water suction pump are inserted on the waterway plate and pump fluid or pump fluid to the steam boiler through the waterway plate.
Preferably, contact heat conduction is formed between the silicon controlled unit and the waterway plate.
Preferably, the waterway board is provided with a water receiving port, an external water inlet and an external water outlet, an in-board water inlet waterway is connected between the water receiving port and the external water inlet, a water inlet pump serial connection inlet and a water inlet pump serial connection outlet are arranged in the in-board water inlet waterway, an in-board water pumping waterway is connected between the water receiving port and the external water outlet, and a water pump serial connection inlet and a water pump serial connection outlet are arranged in the in-board water pumping waterway;
the water channel plate is connected to the steam boiler through the water receiving port, the water inlet and the water outlet of the water inlet pump are respectively connected with the water inlet pump serial connection inlet and the water inlet pump serial connection outlet in a butt joint mode, and the water inlet and the water outlet of the water pump are respectively connected with the water pump serial connection inlet and the water pump serial connection outlet in a butt joint mode.
Preferably, the waterway assembly comprises a detachable joint cover which is detachably sleeved outside the external water inlet and the external water outlet and is provided with an external water outlet which is respectively communicated with the external water inlet and the external water outlet.
Preferably, the water way plate is a rectangular plate, along the first length direction of the water way plate, the external water inlet, the external water outlet and the water receiving port are sequentially and alternately arranged on the plate edge wall of the same long side of the water way plate, and the first plate surface wall of the water way plate is sequentially and alternately provided with the water inlet pump serial connection outlet, the water inlet pump serial connection inlet, the water suction pump serial connection outlet and the water suction pump serial connection inlet.
Preferably, the boiler heating element is thick film.
Preferably, the steam boiler comprises a boiler body, the boiler heating element is arranged on the bottom wall of the boiler body, a partition member is arranged in a boiler chamber in the boiler body to form a water filtering chamber, a steam filtering chamber and a condensing chamber which are communicated with air holes above the liquid level in sequence, and the top of the condensing chamber is connected with a steam outlet pipe.
Preferably, the interlayer piece comprises a water filtering plate, the water filtering plate is a hole grid plate with uniformly distributed filtering holes, the water filtering plate is arranged above the liquid level at intervals, and the water filtering cavity is formed between the water filtering plate and the liquid level;
the interlayer piece further comprises a condensation cover covered above the water filtering plate, the steam filtering cavity is formed between the condensation cover and the water filtering plate, and a plurality of air outlets are formed in the top wall of the condensation cover.
Preferably, the condensation cavity is formed between the condensation cover and the top wall of the boiler body, a backflow step part is formed at the edge of the top wall of the condensation cover, a backflow edge notch is formed on the water filtering plate, and condensed water on the top wall of the boiler body can flow back to the bottom of the boiler cavity through the backflow step part and the backflow edge notch in sequence.
Preferably, the unit controller includes a flow process control module configured to: when the steam generator starts to work, starting the steam boiler to heat at a preset heating power W and constant power, and simultaneously starting the water pump to supply liquid to the steam boiler at an initial liquid inlet flow X1; wherein x1=x0×y, Y is a multiple value constant of not more than 3 and not less than 1.5, and X0 is a current power theoretical evaporation flow rate corresponding to the predetermined heating power W.
Preferably, the following is satisfied:
wherein C1 is the specific heat capacity of the liquid, T0 is the initial liquid temperature, T1 is the boiling point temperature of the liquid, and C2 is the vaporization heat parameter of the liquid.
Preferably, the unit controller further comprises a heating frequency control module configured to: obtaining the preset heating power W according to the set second steam outlet time length T and the multiple value constant Y, wherein the preset heating power W meets the following conditions: w is greater than or equal to X 1 *T*Q 1 +Q 3 *m 1 ；
Wherein,Q 1 ＝C 1 *(T 1 -T 0 )，Q 3 ＝C 3 *(T 1 -T 0 )
c1 is the specific heat capacity of liquid, C2 is the gasification thermal parameter of the liquid, C3 is the specific heat capacity of the material of the peripheral wall of the hearth of the steam boiler, T0 is the initial liquid temperature, T1 is the boiling point temperature of the liquid, m1 is the mass of the peripheral wall of the hearth, Q1 is the heat absorbed in the process of the unit mass of the liquid rising from T0 to T1 in unit time, and Q3 is the heat absorbed in the process of the unit mass of the peripheral wall of the hearth rising from T0 to T1 in unit time.
Preferably, the second steam-out duration T is not more than 3 seconds.
Preferably, a liquid level detector is arranged in the steam boiler, and the flow process control module is further configured to: and controlling the water pump in the process of continuously heating the steam generator to enable the boiler liquid level in the steam boiler to be between the dry-heating prevention liquid level and the excessive liquid level.
Preferably, the flow process control module is further configured to:
when the initial boiler liquid level in the steam boiler reaches a preset control liquid level, the inlet liquid flow is reduced from the initial inlet liquid flow X1 to the current power theoretical evaporation flow X0; and
continuously detecting the liquid level of the boiler, and reducing the liquid inlet flow and adjusting the liquid inlet flow to be reduced to be the liquid inlet flow X3 when the liquid level of the boiler is higher than the preset control liquid level in the continuous exceeding detection time T';
Or when the boiler liquid level is lower than the preset control liquid level in the continuous exceeding detection time T', increasing the liquid inlet flow and adjusting the liquid inlet flow into an incremental liquid inlet flow X4;
wherein the preset control liquid level is between the dry burning prevention liquid level and the excessive liquid level.
Preferably, the decrement liquid inlet flow X3 is half of the current power theoretical evaporation flow X0, and the increment liquid inlet flow X4 is twice of the current power theoretical evaporation flow X0.
Preferably, the standard exceeding detection time T' is inversely proportional to the multiple value constant Y.
Preferably, the flow process control module is further configured to: and when the steam generator stops working, controlling the water pump to pump liquid so as to empty the fluid in the steam boiler.
In addition, the invention also provides a steam cooking device which comprises a cooking cavity, and the steam cooking device further comprises the steam generator, wherein steam is led into the cooking cavity by the steam generator.
Preferably, the steam cooking device further comprises a preheating heating element disposed around an outer wall of the cooking cavity and a complete machine controller in communication with the unit controller, the complete machine controller configured to:
And when the unit controller controls the steam boiler to be heated, the preheating heating element is synchronously started to preheat the cooking cavity.
Preferably, the preheating heating power of the preheating heating element is the maximum heating power of the steam cooking device minus the boiler power and the pumping power.
Preferably, the preheating heating element comprises a top wall preheating element for heating a top wall of the cooking cavity, a rear wall preheating element for heating a rear wall of the cooking cavity, and a bottom wall preheating element for heating a bottom wall of the cooking cavity, the overall machine controller being further configured to: the top wall preheating member, the rear wall preheating member, and the bottom wall preheating member are sequentially activated.
Preferably, the preheating heating element is spaced apart from an outer wall surface of the cooking cavity.
Through the technical scheme, the steam generator is integrated with the waterway assembly with the water pump and the unit controller for controlling the pumping power and the heating power, so that the steam generator has an integrated modularized effect, and related parameters are accurately controlled through the unit controller with the module, the effect of quickly discharging steam of the steam generator is realized, and the modularized structure is more beneficial to improving the purposes of miniaturization and generalization of products of the steam generator.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
fig. 1 is a perspective view of a steam generator according to a preferred embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a cross-sectional view taken along section A-A of FIG. 2;
FIG. 5 is a cross-sectional view of section B-B of FIG. 3;
FIG. 6 is an exploded view of FIG. 1;
FIG. 7 is a schematic view of a structure of a water filter plate;
FIG. 8 is a schematic view of a structure of a condensation shield;
FIG. 9 is a cross-sectional view of section C-C of FIG. 2;
FIG. 10 is a cross-sectional view of section D-D of FIG. 2;
fig. 11 is a perspective view of a waterway assembly according to a preferred embodiment of the present invention;
fig. 12 and 13 are perspective views of a waterway plate assembly according to a preferred embodiment of the present invention;
FIGS. 14 and 15 are exploded views of the waterway plate assembly;
fig. 16 is a front view of the waterway plate assembly;
FIG. 17 is a cross-sectional view of section E-E of FIG. 16;
fig. 18 is a perspective view of a steam cooking device according to a preferred embodiment of the present invention;
Fig. 19 is a front view of a steam cooking device (internal structure) according to a preferred embodiment of the present invention;
FIG. 20 is a cross-sectional view of section F-F of FIG. 19; and
fig. 21 is a schematic structural diagram of the unit controller.
Description of the reference numerals
1. 2 waterway assembly of steam boiler
3. Circuit board assembly 4 box body
5. Isolation box
10. Boiler body 11 water filtering cavity
12. Condensation chamber of steam filtering chamber 13
14. Condensation cover of water filtering plate 15
16. Steam outlet pipe 17 boiler heating element
21. Water pump 22 waterway plate
23. Water channel groove for dismounting joint cover 24
25. Annular seal for thermally conductive plate 26
31. Silicon controlled rectifier unit
151. Air outlet hole of air outlet hole convex plate 152
153. Reflux step part
141. Reflow edge notch of filter cavity 142
211. Intake pump 212 suction pump
221. External water inlet of water receiving port 222 of boiler
223. External water outlet 224 mounting boss
211a inlet pump series outlet 211b inlet pump series inlet
212a pump in series with inlet 212b pump in series with outlet
230. First plate surface wall of external water gap M
241. First waterway groove 242 second waterway groove
243. Third waterway groove N second panel wall
800. Bottom heating element of cooking cavity 603
601. Top wall preheating member 602 rear wall preheating member
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the positional relationship of the various components with respect to one another in the vertical, vertical or gravitational directions.
Aiming at the problems that in the existing steam cooking equipment, a steam generator only comprises a steam boiler for generating steam, and the outside of the steam boiler is connected with a water inlet pipe, a water inlet pump and other parts, the existing steam generator has the problems of complex structure, large occupied volume, low steam outlet speed and the like, the invention provides a novel steam generator, and the novel steam generator is shown in figures 1 to 6. The steam generator includes:
A steam boiler 1 comprising a boiler heating element 17;
waterway assembly 2, including a water pump 21 that pumps fluid or pumps fluid to steam boiler 1; and
and a unit controller for controlling the boiler heating power of the steam boiler 1 and the pumping power of the water pump 21.
Therefore, the steam generator is integrated with the waterway assembly with the water pump and the unit controller for controlling the pumping power and the heating power, so that the steam generator has an integrated modularized effect, and related parameters are accurately controlled by the unit controller with the module, the effect of rapidly discharging steam (discharging steam within 3 seconds) of the steam generator is realized, and the modularized structure is more beneficial to improving the purposes of miniaturization and generalization of the steam generator product. The unit controller of the steam generator can be communicated with the whole machine controller of the whole machine provided with the steam generator, so that the effect of quickly discharging steam of the whole machine product is finally realized.
In particular, the steam generator may include a case 4, and the steam boiler 1, the waterway assembly 2, and the unit controller are all built in a case cavity of the case 4. Therefore, according to the general characteristics of the steam generating device, the steam generating device can be applied to various household steam cooking device products, and the steam generator of the invention concentrates components such as the steam boiler 1, the water pump 21, the control circuit and the like in the box body 4 to form a module structure, so that the module volume can be effectively compressed, the steam generating device can be applied to various types of steam cooking device complete machine products, and the development period of the corresponding steam cooking device can be effectively improved. Wherein the unit controller is typically concentrated on a circuit board assembly 3 (see fig. 1 and 5).
As shown in fig. 5 and 6, the case 4 is preferably a rectangular case, the unit controller and the waterway assembly 2 are stacked up and down, and the steam boiler 1 and the unit controller and waterway assembly 2 stacked up and down are arranged along the length direction of the case cavity. Therefore, in the steam generator, the components are separated clearly, the arrangement positions are proper, the structure is more compact, and the service performance of the steam generator is more reliable.
Further, the size range of the case 4 of the steam generator of the present invention is preferably: a miniaturized modular structure of length no greater than 250mm, width no greater than 100mm, and height no greater than 100 mm.
The inventor has creatively improved and optimized the individual functional components for the compact, miniaturized and "steam-out-of-second" effect of the modular steam generator of the present invention, as will be described in detail below.
In the steam generator of the present invention, the water path assembly 2 includes a water pump 21 and a water path plate 22, as shown in fig. 11. Referring to fig. 9 and 10, the water path plate 22 is provided with an in-plate water path, one end of the in-plate water path is an external water port penetrating out of the box body 4, the other end is a boiler water receiving port 221 connected with the steam boiler 1, the water path plate 22 is also provided with a water pump serial port, and the water pump 21 is inserted on the water path plate 22 through the water pump serial port and is arranged in the in-plate water path in series.
Therefore, the water path assembly 2 not only concentrates the water pump 21 in the steam generator to perform the function of facilitating timely control of the pumping flow rate, but also provides the water path plate 22 connected with the water pump 21 and the steam boiler 1, and the water path plate 22 helps to further shorten the water path length in the steam generator, thereby helping to increase the steam generation speed so as to achieve the effect of rapidly 'discharging steam in seconds'.
With continued reference to fig. 9 to 11, and fig. 16 and 17, in the waterway assembly 2 of the present invention, the water pump 21 includes a water intake pump 211 and a water suction pump 212, the water intake pump 211 for pumping external fluid into the steam boiler 1, and the water suction pump 212 for pumping and discharging the steam boiler 1 outwardly; the external water gap comprises an external water inlet 222 and an external water outlet 223; the water pump serial port comprises a water inlet pump serial inlet 211b, a water inlet pump serial outlet 211a, a water pump serial inlet 212a and a water pump serial outlet 212b; the in-plate water path comprises an in-plate water inlet water path connected between the boiler water receiving port 221 and the external water inlet 222 and an in-plate water pumping water path connected between the boiler water receiving port 221 and the external water outlet 223; the water inlet pump serial inlet 211b and the water inlet pump serial outlet 211a are arranged in the water inlet channel in the plate, and the water pump serial inlet 212a and the water pump serial outlet 212b are arranged in the water pumping channel in the plate.
When the water inlet pump 211 works, external fluid enters from the external water inlet 222, sequentially flows through the water inlet waterways in the plate, enters the water inlet pump 211 from the water inlet pump serial connection inlet 211b, flows to the boiler water receiving port 221 from the water inlet pump serial connection outlet 211a and is pumped into the steam boiler 1. When the water pump 212 works, waste liquid in the steam boiler 1 can be pumped out through the boiler water receiving port 221 and enter the water pump 212 from the water pump serial connection inlet 212a, and the process flows through the water pumping waterway in the plate, so that the waste liquid in the steam boiler 1 is discharged outwards from the external water outlet 223, and in this way, the waterway in the plate in the whole waterway plate 22 is shorter, and the structure is simple and reasonable.
Specifically, as shown in fig. 9 and 10, the external water port and the boiler water port 221 may protrude from a plate sidewall of the waterway plate 22, and the water pump string port protrudes from the first plate surface wall M of the waterway plate 22.
Meanwhile, the in-plate waterway includes waterway grooves 24 formed on a second plate wall N opposite to the first plate wall M, so that the in-plate waterway of the waterway plate 22 is formed by cooperation of the respective water receiving ports and the waterway grooves 24. Referring to the waterway grooves 24 shown in fig. 14, the in-board waterway of the present invention is preferably in the form of a slotted waterway because the slotted circulation waterway has better conduction and heat dissipation performance than a closed waterway, and more contributes to water cooling of the thyristor unit 31 (see fig. 5) for adjusting heating power, the specific structure and principle are further explained below. Of course, the in-board waterway is not limited to the waterway groove 24 of the slotted form, and may be a closed waterway groove.
To further seal the water channel 24, the water channel plate 22 may be optionally attached to the outer wall surface of the steam boiler 1.
Specifically, as shown in fig. 9 to 13, the waterway plate 22 is preferably a rectangular plate, and the external water inlet 222, the external water outlet 223 and the boiler water receiving port 221 are sequentially arranged on the plate side wall of the same long side of the waterway plate 22 at intervals along the first length direction of the waterway plate 22, and the water inlet pump serial outlet 211a, the water inlet pump serial inlet 211b, the water pump serial outlet 212b and the water pump serial inlet 212a are sequentially arranged on the first plate surface wall M at intervals.
Meanwhile, the external water inlet 230, the boiler water inlet 221 and the water pump serial port are all communicated with the water channel 24, and the water channel 24 is arranged on the second plate wall N opposite to the first plate wall M. As shown in fig. 9, the waterway groove 24 includes a first waterway groove 241, a second waterway groove 242 and a third waterway groove 243, the first waterway groove 241 is communicated with the inlet pump serial connection outlet 211a and the boiler water receiving port 221, the second waterway groove 242 is communicated with the inlet pump serial connection inlet 211b and the external water inlet 222, and the third waterway groove 243 is communicated with the external water outlet 223 and the water pump serial connection outlet 212b.
Preferably, the waterway plate 22 may include front and rear half plates overlapped in a thickness direction according to structural characteristics of the waterway plate 22 having the first and second plate walls M and N having different structures, which facilitates manufacturing of the waterway plate 22. Meanwhile, the waterway plate 22 is provided with a screw mounting post and/or a mounting boss 224 (see fig. 10 and 15), and the screw mounting post and/or the mounting boss 224 (see fig. 10 and 15) is a connection fixing portion of the waterway plate 22.
Typically, the steam generator further comprises an external water tank fixedly mounted on the outer wall of the box body 4 and abutting the external water gap, the corresponding ground waterway assembly 2 can communicate with the abutting external water tank and/or waste water tank, and the external water inlet 222 is communicated with the external water inlet tank, and the external water outlet 223 is communicated with the external waste water tank.
In the steam generator's box body 4, steam boiler 1, the water route board 22 and the water pump 21 of water route subassembly 2 are laminated in proper order along the length direction in box chamber and are arranged, and the water route is shorter.
The external outlet of the waterway plate 22 includes an external water inlet 222 and an external water outlet 223, and may be used to connect corresponding water tanks (there may be 2 or more water tanks), but according to the number and structure of the actual water tanks outside the box body 4 of the steam generator, for example, a conventional steam cooking device generally includes only one water tank, so for this, in particular, the present invention also provides a special waterway plate assembly, as in the preferred embodiment shown in fig. 12 to 15, which includes:
the waterway plate 22 is provided with a water receiving port (namely the water receiving port 221 of the boiler, which is consistent with the description below), an external water inlet 222 and an external water outlet 223, an in-plate water inlet waterway is connected between the water receiving port and the external water inlet 222, a water inlet pump serial inlet 211b and a water inlet pump serial outlet 211a are arranged in the in-plate water inlet waterway, an in-plate water pumping waterway is connected between the water receiving port and the external water outlet 223, and a water pump serial inlet 212a and a water pump serial outlet 212b are arranged in the in-plate water pumping waterway; and
The joint cover 23 is detachably sleeved outside the external water inlet 222 and the external water outlet 223 and is provided with an external water outlet 230 which is respectively communicated with the external water inlet 222 and the external water outlet 223.
It can be seen that the waterway board assembly provided by the invention not only comprises the waterway board 22, but also comprises an optional detachable joint cover 23 with a disassembling function. Therefore, the waterway plate 22 with the detachable joint cover 23 can be applied to a case having only one water tank or a case having both a water inlet tank and a waste water tank. The detachable joint cover 23 can be selected according to the actual situation, so that the universality of the waterway board assembly is higher, and when only one external water tank is provided, the waterway board assembly with the detachable joint cover 23 can be used, so that the external water gap 230 is correspondingly connected with the external water tank.
The present invention further provides a waterway assembly 2, as shown in fig. 11, in the preferred embodiment, the waterway assembly 2 includes a water inlet pump 211, a water pump 212, and the waterway board assembly described above, wherein the water inlet pump 211 and the water pump 212 are respectively inserted into the waterway board 22, the water inlet and the water outlet of the water inlet pump 211 are respectively connected with the water inlet pump serial connection inlet 211b and the water inlet pump serial connection outlet 211a, and the water inlet and the water outlet of the water pump 212 are respectively connected with the water pump serial connection inlet 212a and the water pump serial connection outlet 212b. Therefore, the waterway assembly 2 of the present invention also includes all the advantages of the waterway plate assembly, and will not be described in detail.
In the steam generator of the present invention, the circuit board assembly 2 may further incorporate therein a thyristor unit 31 (typically 3, for controlling the water intake pump 211, the water suction pump 212 and the boiler heating element 17, respectively) for controlling the heating power of the boiler heating element 17 and the water pump power, and in the preferred embodiment shown in fig. 5, the thyristor unit 31 is particularly arranged in contact with the waterway board 22 for heat conduction. Therefore, because the existing silicon controlled rectifier units (such as IGBT modules) are used together with a radiator, the silicon controlled rectifier units are cooled to ensure the normal operation of the silicon controlled rectifier units, while the silicon controlled rectifier units 31 of the present invention can realize the water cooling and heat dissipation of the silicon controlled rectifier units 31 by contacting the waterway plate 22, thereby replacing the radiator, which is beneficial to saving the installation space and further improving the miniaturization effect of the steam generator, and also beneficial to reducing the production cost of the product.
Specifically, referring to fig. 5 and 11 to 15, the steam generator is provided with a heat conduction plate 25 extending from a side wall of the waterway plate 22, and the thyristor unit 31 is attached to the heat conduction plate 25. Generally, one end of the thyristor unit 31 is welded on the circuit board of the circuit board assembly 3, so that the thyristor unit 31 can be arranged at the edge of the circuit board to facilitate the bonding arrangement of the heat conducting plate 25, and the contact area between the thyristor unit 31 and the heat conducting plate 25 is ensured to be large enough, thereby realizing effective contact heat dissipation in time.
In the structure of the case 4 of the steam generator, as shown in fig. 5, the circuit board assembly 3 and the waterway assembly 2 are stacked up and down, and the steam boiler 1, the circuit board assembly 3 and the waterway assembly 2 stacked up and down are arranged along the length direction of the case cavity, and the waterway plate 22 is sandwiched between the water pump 21 and the steam boiler 1.
As shown in fig. 6, 9 and 10, the steam generator includes an isolation box 5 for spacing the waterway assembly 2 from the circuit board assembly 3, and the circuit board assembly 3 is installed in the isolation box 5, so that the structure of the circuit board assembly 3 and the waterway board assembly 2 is separated, the effect of water-electricity separation is achieved, and the normal operation of the circuit board assembly 3 is ensured, thereby ensuring the service performance of the steam generator.
According to the above-described structure in which the waterway plate 22 of fig. 14 is formed therein with the waterway grooves 24 formed therein, and the waterway grooves 24 are preferably provided in the form of grooves on the side facing the steam boiler, as shown in fig. 11 to 15, the heat conductive plate 25 may preferably be fixed on the second plate wall N and cover the waterway grooves 24, and the heat conductive plate 25 is directly contacted with the fluid, thereby improving the heat dissipation effect.
To ensure the normal circulation of the in-plate waterway of the waterway plate 22, as shown in fig. 15 and 16, an annular seal 26 is provided between the heat conductive plate 25 and the waterway plate 22 to ensure the sealing fluidity of the in-plate waterway.
Meanwhile, since the water pump 21 includes the water intake pump 211 and the water suction pump 212, the water intake pump 211 is used for pumping fluid (typically, the temperature is normal or low) into the steam boiler 1, and heating of the fluid is achieved by the steam boiler 1 to generate steam, and the water suction pump 212 is used for pumping out the fluid in the steam boiler 1 for the next cooking to generate steam, the temperature of the fluid pumped by the water suction pump 212 is typically high and the heat dissipation effect on the thyristor unit 3 is not obvious, and therefore, the thyristor unit 31 is preferably disposed at a side close to the water intake pump 211, so that the water cooling effect of the thyristor unit 31 is better.
In a preferred embodiment of the steam boiler 1 of the steam generator of the present invention, referring to fig. 4 to 6, the steam boiler 1 comprises a boiler body 10 and a boiler heating element 17 provided on a bottom wall of the boiler body 10, a water filtering chamber 11, a steam filtering chamber 12 and a condensing chamber 13 provided in a boiler chamber of the boiler body 10 with a spacer member to form an air hole communication in sequence above a liquid surface, and a steam outlet pipe 16 is connected to a top of the condensing chamber 13.
Therefore, in the steam boiler 1 of the present invention, when the steam boiler 1 is operated and generates steam, the steam is "filtered" by passing through the water filtering chamber 11, the steam filtering chamber 12 and the condensing chamber 13 in order, and then discharged from the steam outlet pipe 16. Thus, the steam boiler 1 of the present invention is a new type of steam boiler with a "gas and water filtering" boiler chamber, such that the steam conducted out of the steam outlet pipe 16 of the steam boiler 1 is saturated steam without large particles of steam, thereby ensuring a good cooking effect of the steam boiler 1.
Specifically, the spacer includes a water filter plate 14, as shown in fig. 7, the water filter plate 14 is a hole grid plate with uniformly distributed filter holes 141, the water filter plate 14 is disposed above the liquid surface at intervals, and the water filter chamber 11 is formed between the water filter plate 14 and the liquid surface. This is because, when the fluid (e.g., water) in the steam boiler 1 is heated and boiled, a large amount of bubbles are generated when the water is boiled, and water drops are generated when the bubbles burst, and these bubbles and water drops are easily guided to the steam outlet (e.g., the steam outlet pipe 16) to form scale and clog the steam outlet. In the invention, the water filtering plates 14 which are uniformly distributed and are favorable for uniformly breaking foam filter holes 141 are arranged, and the water filtering plates 14 are also favorable for isolating and preventing water drops or water vapor generated after breaking from continuously flowing upwards, so that the water drops or water vapor after breaking foam can flow back and drop below the liquid level. Therefore, when the water filtering plate 14 serving as the interlayer member is added, the steam can be primarily isolated and filtered from the water vapor in the large bubbles after passing through the water filtering cavity 11 with the water filtering plate 14, and meanwhile, the water filtering cavity 11 has the function of breaking bubble water filtering by avoiding the blockage of the steam outlet pipe 16 by scale.
Preferably, the water filter plate 14 is arranged no more than 15mm above the highest liquid level.
Meanwhile, the spacer may further include a condensation cover 15 covering the water filtering plate 14, as shown in fig. 8, the steam filtering cavity 12 is formed between the condensation cover 15 and the water filtering plate 14, and a plurality of air outlet holes 152 are formed in a top wall of the condensation cover 15. Therefore, when the steam enters the steam filtering cavity 12 after being filtered by the water filtering cavity 11, condensation and filtration of large-particle steam can be further performed in the steam filtering cavity.
Further, the top wall of the condensation cover 15 is formed with an air outlet hole convex plate 151 protruding upward, and as further shown in fig. 8, the air outlet holes 152 are uniformly distributed on the air outlet hole convex plate 151, and the convex plate area of the air outlet hole convex plate 151 is not more than one half of the top wall area of the condensation cover 15. As the vapor is discharged upwardly from the condensing hood 15, it will impinge on and deflect at other locations of the top wall of the condensing hood 15 not having the vapor outlet holes 152, contributing to further filtering and condensing effects of the vapor, ultimately allowing such filtered vapor to be discharged from the vapor outlet holes 152 of the concentrated vapor outlet hole boss 151. Of course, the convex plate area of the vent hole convex plate 151 cannot be too small to occupy the total area, and the effect of smoothly flowing upwards and discharging the steam is considered.
In order to ensure the foam breaking and air filtering effects of the water filtering plate 14 and the condensation cover 15, the range of the aperture of the filtering holes is preferably 5mm to 10mm, and the range of the aperture of the air outlet hole 152 is preferably 3mm to 8mm.
Meanwhile, the height of the steam filtering cavity 12 is not higher than 15mm.
Further, as shown in fig. 6 and 8, the condensation chamber 13 is formed between the condensation housing 15 and the top wall of the boiler body 10, the top wall edge of the condensation housing 15 forms a backflow step portion 153, the water filtering plate 14 is formed with a backflow edge notch 142, and the condensation water on the top wall of the boiler body 10 can flow back to the bottom of the boiler chamber sequentially through the backflow step portion 153 and the backflow edge notch 142, so that the steam is condensed again in the condensation chamber 13, and the steam led out from the steam boiler 1 is preferably ensured to be saturated steam. In addition, the reflux and recovery of the condensed water are also beneficial to improving the endurance of the water source.
To make the reflux effect more thorough, the reflux step 153 and the reflux edge notch 142 are located directly below the steam outlet tube 16.
The boiler heating element 17 is preferably thick film in order to increase the heating efficiency of the steam boiler 1 for achieving a rapid steam outlet effect.
In order to enable the modular steam generator of the present invention to rapidly generate steam, achieving the effect of "second steam generation" and maintaining continuous steam generation during the subsequent process, in the circuit board assembly 3 of the present invention, the unit controller includes a flow process control module configured to: when the steam generator starts to operate, the steam boiler 1 is started to heat at a predetermined heating power W and the water pump 21 is started to supply liquid to the steam boiler 1 at an initial liquid feed flow X1. Wherein x1=x0×y, Y is a multiple value constant of not more than 3 and not less than 1.5, and X0 is a current power theoretical evaporation flow rate corresponding to the predetermined heating power W.
Because the water inflow of the steam boiler 1 tends to be larger in the prior art under the condition of avoiding dry combustion, that is, the initial inflow rate X1 is set larger, and the multiple Y is larger. Typically Y is set to about 10 times or even more, which in turn results in a slower steam outlet speed of the existing steam boilers. In contrast, in the steam generator of the present invention, the key of "steam-out-of-second" is to reasonably control the water supply amount of the initial liquid inlet flow X1 to achieve rapid steam-out and avoid dry combustion. Therefore, after the heating power, that is, the preset heating power W is given, the corresponding theoretical evaporation liquid amount X0 of the current power is calculated, and then the initial liquid inlet flow is controlled to be Y times of X0, and the steam can be discharged in seconds within a reasonable range, wherein Y is preferably a multiple value constant which is not more than 3 and not less than 1.5.
In general, the theoretical evaporation liquid amount X0 satisfies:
wherein C1 is the specific heat capacity of the liquid, T0 is the initial liquid temperature, T1 is the boiling point temperature of the liquid, and C2 is the vaporization heat parameter of the liquid. Therefore, when the predetermined heating power W is given, the theoretical evaporation liquid amount X0 of the current power can be obtained according to the above formula (1).
Meanwhile, the unit controller further comprises a heating frequency control module, and the heating frequency control module is set to: obtaining preset heating power W according to the set steam outlet time length T and the multiple value constant Y, wherein the preset heating power W meets the following conditions: w is greater than or equal to X 1 *T*Q 1 +Q 3 *m 1 ； (2)
Wherein,
c1 is the specific heat capacity of liquid, C2 is the gasification thermal parameter of the liquid, C3 is the specific heat capacity of the material of the peripheral wall of the furnace chamber of the steam boiler 1, T0 is the initial liquid temperature, T1 is the boiling point temperature of the liquid, m1 is the mass of the peripheral wall of the furnace chamber, Q1 is the heat absorbed by the unit mass of liquid in unit time in the process of rising from T0 to T1, and Q3 is the heat absorbed by the unit mass of peripheral wall of the furnace chamber in unit time in the process of rising from T0 to T1.
In the modularized steam generator, the unit controller is controlled to realize the control of 'steam outlet per second' mainly comprising three variable parameters, namely steam outlet seconds T, preset heating power W and multiple Y of the theoretical evaporation flow of the current power. Referring to fig. 21, in different application occasions, the steam generator of the present invention can determine the preset heating power W by giving the steam seconds T and the multiple Y within a reasonable range through the calculation and comparison unit or the table query unit in the heating frequency control module of the unit controller, and further adjust the corresponding preset heating power W through the thyristor unit 31 on hardware, so as to realize the universal application and design of the modularized steam generator.
The steam generator can realize the effect of rapid steam discharge, and theoretically, the steam discharge time length T of seconds can be not more than 3 seconds.
In the experiment, water of 25 ℃ was introduced into the steam boiler 1 to be heated and boiled to generate steam. Wherein, the material of the hearth peripheral wall of the steam boiler 1 is stainless steel, the specific heat capacity C1 of water is 4.186KJ/Kg, the gasification thermal parameter C2 of water is 2257.2KJ/Kg, the specific heat capacity C3 of the stainless steel is 0.449KJ/Kg, the initial liquid temperature T0 is 25 ℃, the boiling point temperature T1 of water is 100 ℃, and the mass m1 of the hearth peripheral wall is 91.3g. According to the calculation of the formula (2) and the formula set (3), when the preset heating power W is 2000W and y=2.3 times, the duration of the theoretical initial steam generation T may be calculated to be about 3 seconds.
In the use process of the modularized steam generator, the flow process control module of the unit controller limits reasonable fluctuation adjustment of flow on a time axis, namely, timely adjustment of liquid inlet flow Y X0, so that faster steam discharge, namely, so-called 'steam discharge per second' and continuous steam discharge can be realized, and dry combustion is prevented.
For real-time supervision water level makes the unit control ware realize preventing dry combustion method and avoid because of heating excessive water and lead to unable quick or lasting steam that goes out in the feed liquor in-process of steam boiler 1, be equipped with liquid level detector (not shown) in the steam boiler 1, flow process control module still configures: during the continuous heating of the steam generator, the water pump 21 is controlled such that the boiler level in the steam boiler 1 is between the dry heat preventing level and the excess level.
To ensure that the continuous steam output is maintained after the initial "second steam output" of the steam generator is achieved, the steam is not interrupted during the fluid infusion process and still remains continuously generated. In this regard, the flow process control module is further configured to:
when the initial boiler liquid level in the steam boiler 1 reaches a preset control liquid level, the inlet liquid flow is reduced from the initial inlet liquid flow X1 to the current power theoretical evaporation flow X0; and
continuously detecting the liquid level of the boiler, and reducing the liquid inlet flow and adjusting the liquid inlet flow into the reduced liquid inlet flow X3 when the liquid level of the boiler is higher than the preset control liquid level in the continuous exceeding detection time T';
or when the boiler liquid level is lower than the preset control liquid level in the continuous exceeding detection time T', increasing the liquid inlet flow and adjusting the liquid inlet flow into the incremental liquid inlet flow X4;
wherein the preset control liquid level is between the dry burning prevention liquid level and the excessive liquid level.
Preferably, the decrement liquid inlet flow X3 is half of the current power theoretical evaporation flow X0, and the increment liquid inlet flow X4 is twice of the current power theoretical evaporation flow X0, so as to ensure that the boiler liquid level in the steam boiler 1 is maintained between the dry burning prevention liquid level and the excessive liquid level.
Wherein, the overproof detection time T' is inversely proportional to the multiple value constant Y.
Meanwhile, the flow process control module is further configured to: when the steam generator stops working, the water pump 21 is controlled to pump liquid to empty the fluid in the steam boiler 1, so that not only can the residual liquid in the steam boiler 1 be prevented from forming scale, but also the steam boiler is ready for the next starting and the quick steam outlet is ensured.
In addition, the present invention provides a steam cooking apparatus, which includes a cooking cavity 800, as shown in fig. 18 to 20, and also includes the steam generator described above, and the steam generator introduces steam into the cooking cavity 800. Therefore, the steam cooking device of the present invention also includes all the advantages of the steam generator, and will not be described in detail.
Since in the existing steam cooking apparatus, the inner wall of the cooking cavity 800 and the inside of the cavity are in a low temperature environment before steam is introduced into the cooking cavity 800. If the steam is directly introduced into the cooking cavity 800 in the low-temperature environment, the rising speed of the environment temperature in the cooking cavity 800 is low, and the steam is easily caused to meet the low-temperature inner wall surface to form condensed water to directly drip onto the food, so that the mouthfeel of the food can be influenced, the appearance of the food can be influenced, the cooking effect of the food is influenced, and the fermentation expansion and other effects of steamed bread can be influenced when steamed bread is cooked. In this regard, the steam cooking apparatus of the present invention further comprises a preheating heating element disposed around the outer wall of the cooking cavity 800 and a complete machine controller in communication with the unit controller, the complete machine controller being configured to: when the heating steam boiler 1 is controlled by the unit controller, the preheating heating elements are synchronously started to preheat the cooking cavity 800, so that the function of preheating the cooking cavity 800 is synchronously started when the steam boiler 1 is heated, and the environment in the cooking cavity 800 is quickly preheated.
The preheating heating power of the preheating heating element is the maximum heating power of the steam cooking device minus the boiler power and the pumping power, so that the working power of the steam cooking device does not exceed the highest rated heating power used by the whole machine.
Referring to fig. 19 and 20, the preheating heating elements include a top wall preheating element 601 for heating the top wall of the cooking cavity 800, a rear wall preheating element 602 for heating the rear wall of the cooking cavity 800, and a bottom wall preheating element 603 for heating the bottom wall of the cooking cavity 800, and the overall controller is further configured to: the top wall preheating member 601, the rear wall preheating member 602, and the bottom wall preheating member 603 are sequentially activated such that the top wall preheating member 601, the rear wall preheating member 602, and the bottom wall preheating member 603 are sequentially operated intermittently.
In addition, since most of the existing cooking cavities 800 use enamel materials with good performance as cavity materials, in order to prevent the enamel cavities from changing color or deforming under high-temperature heating, the preheating heating elements are arranged at intervals with the outer wall surface of the cooking cavity 800, so that the preheating heating elements can heat the outer wall surface of the cooking cavity 800 in a non-contact manner.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (13)
1. A steam generator, the steam generator comprising:
a steam boiler (1) comprising a boiler heating element (17);
-a waterway assembly (2) comprising a water pump (21) pumping fluid or pumping fluid to the steam boiler (1); and
a unit controller for controlling a boiler heating power of the steam boiler (1) and a pumping power of the water pump (21);
the steam boiler (1) comprises a boiler body (10), a boiler heating element (17) is arranged on the bottom wall of the boiler body (10), a water filtering plate (14) and a condensation cover (15) are sequentially arranged in a boiler chamber in the boiler body (10) so as to sequentially form a water filtering cavity (11), a steam filtering cavity (12) and a condensation cavity (13) which are communicated with air holes above the liquid level, and the top of the condensation cavity (13) is connected with a steam outlet pipe (16);
The top wall edge of the condensation cover (15) forms a backflow step part (153), the water filtering plate (14) is provided with a backflow edge notch (142), and the condensation water on the top wall of the boiler body (10) can flow back to the bottom of the boiler cavity through the backflow step part (153) and the backflow edge notch (142) in sequence.
2. The steam generator according to claim 1, characterized in that the steam generator comprises a box (4), the steam boiler (1), the waterway assembly (2) and the unit controller being all built into a box cavity of the box (4).
3. The steam generator according to claim 2, wherein the case body (4) is a rectangular case, the unit controller and the waterway assembly (2) are arranged in a vertically stacked manner, and the steam boiler (1) and the unit controller and waterway assembly (2) which are arranged in a vertically stacked manner are arranged along a length direction of the case cavity.
4. The steam generator according to claim 1, characterized in that the steam generator comprises a circuit board assembly (3) electrically connected to the boiler heating element (17), a thyristor unit (31) being integrated in the circuit board assembly (3) for controlling the boiler heating power of the boiler heating element (17).
5. The steam generator according to claim 4, wherein the waterway assembly (2) comprises a waterway plate (22), the water pump (21) comprises a water inlet pump (211) and a water pump (212), and the water inlet pump (211) and the water pump (212) are plugged onto the waterway plate (22) and pump fluid or pumping fluid to the steam boiler (1) through the waterway plate (22).
6. The steam generator according to claim 5, characterized in that contact heat conduction is formed between the thyristor unit (31) and the waterway plate (22).
7. The steam generator according to claim 6, wherein the waterway plate (22) comprises a boiler water receiving port (221), an external water inlet (222) and an external water outlet (223), an in-plate water inlet waterway is connected between the boiler water receiving port (221) and the external water inlet (222), the water inlet pump (211) is arranged in the in-plate water inlet waterway, an in-plate water pumping waterway is connected between the boiler water receiving port (221) and the external water outlet (223), and the water pump (212) is arranged in the in-plate water pumping waterway;
the waterway assembly (2) further comprises a disassembly joint cover (23), wherein the disassembly joint cover (23) is detachably sleeved outside the external water inlet (222) and the external water outlet (223) and is provided with an external water outlet (230) which is respectively communicated with the external water inlet (222) and the external water outlet (223).
8. The steam generator according to claim 7, wherein the thyristor unit (31) is disposed near a water inlet channel side of the water channel plate (22) in a plate to form contact heat conduction with the water channel plate (22).
9. A steam generator according to claim 4, wherein,
the water filtering plate (14) is a hole grid plate with uniformly distributed filtering holes, the water filtering plate (14) is arranged above the liquid level at intervals, and the water filtering cavity (11) is formed between the water filtering plate (14) and the liquid level;
the condensing cover (15) is covered and buckled above the water filtering plate (14), the steam filtering cavity (12) is formed between the condensing cover (15) and the water filtering plate (14), and a plurality of air outlet holes (152) are formed in the top wall of the condensing cover (15);
the condensation chamber (13) is formed between the condensation shield (15) and the top wall of the boiler body (10).
10. The steam generator of claim 1, wherein the unit controller comprises:
a heating frequency control module configured to determine a predetermined heating power W based at least on a set second steam-out time period T; and
and the flow process control module is configured to control the initial liquid inlet flow X1 of the steam boiler to realize second steam outlet within the second steam outlet duration T when the steam boiler is heated at the preset heating power W.
11. The steam generator of claim 10, wherein the flow process control module is further configured to: when the steam generator stops working, the water pump (21) is controlled to pump liquid to empty the fluid in the steam boiler (1).
12. A steam cooking device comprising a cooking cavity (800), characterized in that the steam cooking device further comprises a steam generator according to any one of claims 1-11, which introduces steam into the cooking cavity (800).
13. The steam cooking device of claim 12, further comprising a preheat heating element disposed about an outer wall of the cooking cavity (800) and a complete machine controller in communication with the unit controller, the complete machine controller configured to:
-controlling, by the unit controller, the heating of the steam boiler (1), the simultaneous activation of the preheating heating elements for preheating the cooking cavity (800);
wherein the preheating heating power of the preheating heating element is the maximum heating power of the steam cooking device minus the boiler power and the pumping power.
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| CN109757973B (en) * | 2019-02-27 | 2024-02-27 | 广东格兰仕集团有限公司 | Waterway system of electric steaming furnace |
| CN112006529B (en) * | 2019-05-31 | 2021-10-29 | 宁波方太厨具有限公司 | Steam box and microwave oven integrated machine |
| CN110680197B (en) * | 2019-09-29 | 2021-11-02 | 广东美的厨房电器制造有限公司 | Liquid storage container, control device, steam generation system, cooking equipment and detection method |
| CN113693429B (en) * | 2020-05-21 | 2022-05-03 | 佛山市顺德区美的电热电器制造有限公司 | Cooking utensil and processing apparatus |
| CN111772472B (en) * | 2020-06-09 | 2021-08-03 | 佛山市汇景厨具工程有限公司 | Electromagnetic heating energy-saving steam stove |
| EP4033162A1 (en) * | 2021-01-25 | 2022-07-27 | BSH Hausgeräte GmbH | Fluid evaporator for a steam cooking appliance with a specific filter tube for filtering limescale particles and steam cooking appliance |
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| CN105658124A (en) * | 2014-06-16 | 2016-06-08 | 优格斯特/弗里斯马格股份公司 | Beverage preparation device and operating method |
| CN104841147A (en) * | 2015-05-20 | 2015-08-19 | 浙江创兴化工设备有限公司 | Agitating type evaporator for salt-containing wastewater separation |
| CN206130953U (en) * | 2016-08-31 | 2017-04-26 | 浙江安德电器有限公司 | Boiler water level monitored control system on steam oven |
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| CN107356094A (en) * | 2016-08-31 | 2017-11-17 | 青岛科技大学 | A kind of steam dryer of steam flow intelligent control |
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