CN204970897U - Formula steam generator is put at end - Google Patents

Abstract

The utility model discloses a bottom-mounted steam generating device. In the bottom-mounted steam generating device, the steam generator includes a water container and a heater connected to the water container, and the heater is used to heat the water container. The water tank is used to supply water to the water container. The electromagnetic valve is connected with the water container and the water tank and is used to control the on-off of the water circuit between the water container and the water tank. The controller is used to turn on and off the heater, and turn on and off the solenoid valve, and adjust the on-off ratio of the solenoid valve every set time after the heater is turned on. In the above-mentioned bottom-mounted steam generating device, as the working time of the heater increases, the controller adjusts the on-off ratio of the solenoid valve to adjust the amount of water flowing into the water container from the water tank, thereby realizing the adjustment of the water level in the water container, so that the product performance More stable, no dry burning, and the steam generator works more reliably.

Description

Bottom-mounted steam generator

technical field

The utility model relates to the field of household appliances, in particular to a bottom-mounted steam generating device.

Background technique

In recent years, people have paid more and more attention to healthy eating. Steam cooking, as a cooking method that can produce delicious taste and keep nutrition intact, has penetrated into people's daily cooking. Therefore, the steam cooking products utilizing the steam cooking method are welcomed by more and more people. For this type of household appliances, such as steam ovens, etc., at present, the most widely used method is to boil water with a bottom-mounted heating plate to generate steam. This implementation method is very simple. Therefore, the products with the bottom heating plate structure are adopted so frequently, so the products we can see in the market have obvious homogeneity in appearance and structure.

The above-mentioned steam cooking products that realize steam cooking by placing a heating plate at the bottom, among which a considerable part adopts the principle of placing the water supply water box on the side, and using the principle of water flowing to the lower part through the water valve, to heat the heating plate of the steam cooking product. Carry out water supply. There are also a small number of products that use water pumps for stable water supply.

However, no matter what kind of water supply is realized, in fact, it is inseparable from the control of the water level or the control of the water flow. Wherein, the current solution is to set an auxiliary water box at a lower position than the original water box, and then configure a water level sensor (probe or float) therein to control the water level in the heating plate.

The disadvantages of the above solutions are: 1. Like the detection method using a float, since the float itself needs to be large enough to ensure that it can detect a low water level, the water level detection device is particularly large, which is not conducive to the use of small household appliances, and for The control precision of this kind of mechanical detection is not particularly high, so the water level control is not very good. 2. For the method of using a water level probe, the detection resistance is mainly used to confirm whether there is water in the auxiliary water tank, so this solution is only effective for impure water (because the resistance of pure water or near-pure water is close to infinity , ordinary circuits are difficult to measure), which obviously limits the scope of application of the product. In addition, after the water flows into the auxiliary water box, the possible splashing will also affect the accuracy of the product in judging the water level.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, the utility model needs to provide a bottom-mounted steam generating device.

A bottom-mounted steam generating device includes a steam generator, a water tank, an electromagnetic valve and a controller. The steam generator includes a water container and a heater connected to the water container, and the heater is used for heating the water container. The water tank is used to supply water to the water container. The electromagnetic valve is connected with the water container and the water tank and is used to control the on-off of the water circuit between the water container and the water tank. The controller is used to turn on and off the heater, and turn on and off the solenoid valve, and adjust the on-off ratio of the solenoid valve every set time after the heater is turned on.

In the above-mentioned bottom-mounted steam generating device, as the working time of the heater increases, the controller adjusts the on-off ratio of the solenoid valve to adjust the amount of water flowing into the water container from the water tank, thereby realizing the adjustment of the water level in the water container, so that the product performance More stable, no dry burning, and the steam generator works more reliably. At the same time, the bottom-mounted steam generating device does not have an additional water level detection device, which reduces the complexity of the system and avoids the increase in the production defect rate caused by the quality problems of each component during mass production.

In one embodiment, the bottom-mounted steam generating device includes a timer, and the timer is connected to the controller, and the controller is used to control the timer to start timing when the heater is turned on.

In one embodiment, the controller includes a memory, which stores adjustment parameters for adjusting the on-off ratio of the solenoid valve, and the controller adjusts the on-off ratio of the solenoid valve according to the adjustment parameters.

In one embodiment, the position of the water container is lower than that of the water tank.

In one embodiment, the bottom-mounted steam generating device includes a water level detection device, the water level detection device is used to detect the water level of the water tank, and the controller is used to adjust the on-off ratio of the solenoid valve according to the detected water level of the water tank .

In one embodiment, the controller includes a heater control module and a solenoid valve control module. The heater control module is used to turn on or turn off the heater. The solenoid valve control module is used to open or close the solenoid valve, and adjust the on-off ratio of the solenoid valve every set time after the heater control module turns on the heater.

In one embodiment, the bottom-mounted steam generating device includes a cooking chamber, the water tank is arranged at a side of the cooking chamber, and the steam generator is arranged at the bottom of the cooking chamber.

In one embodiment, the water level detection device is a water level sensor or a weight sensor.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural view of a bottom-mounted steam generating device in a preferred embodiment of the present invention;

Fig. 2 is a schematic diagram of a module of a bottom-mounted steam generating device in a preferred embodiment of the present invention;

Fig. 3 is a schematic diagram of the control principle of the solenoid valve of the bottom-mounted steam generating device in a preferred embodiment of the present invention.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

The disclosure below provides many different implementations or examples for realizing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. Furthermore, the present invention may repeat reference numerals and/or letters in different instances. This repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials. Additionally, configurations described below in which a first feature is "on" a second feature may include embodiments where the first and second features are formed in direct contact, and may include additional features formed between the first and second features. In some embodiments, the first and second features may not be in direct contact.

Referring to FIG. 1 , a bottom-mounted steam generating device 100 in a preferred embodiment of the present invention includes a steam generator 102 , a water tank 104 , a solenoid valve 106 and a controller 108 . The bottom-mounted steam generating device 100 can be applied to household appliances such as steam cooking equipment, a water dispenser with a water box, and a coffee machine with a water box.

The steam generator 102 includes a water container 110 and a heater 112 connected to the water container 110 , and the water container 110 is used for accommodating water for evaporation. The water container 110 is disposed at the bottom of the bottom-mounted steam generating device 100 , so that the steam from the steam generator 102 enters into the cooking cavity 114 of the bottom-mounted steam generating device 100 .

The heater 112 is used to heat the water container 110 . The heater 112 can be an electric heating tube, which is disposed at the bottom of the water container 110 . Powering on or off the heater 112 can make the heater 112 heat or stop heating the water tank 110 .

The water tank 104 is used to supply water to the water container 110 . The water tank 104 is disposed on a side of the cooking cavity 114 and connected to the water container 110 through a water pipe 116 . Preferably, the position of the water container 110 is lower than that of the water tank 104, so that all or most of the water in the water tank 104 can enter into the water container 110 through the water level difference between the water tank 104 and the water container 11 , improved water utilization.

The solenoid valve 106 is connected to the water container 110 and the water tank 104 and is used for controlling the on-off of the water circuit between the water container 110 and the water tank 104 . For example, electromagnetic valve 106 is connected with water container 110 and water tank 104 through water pipe 116, and the on-off of electromagnetic valve 106 controls the on-off of the water circuit between this water container 110 and this water tank 104, and then controls water tank 104 to water container. 110 water supply volume.

The controller 108 is used to turn on and off the heater 112 and turn on and off the solenoid valve 106 , and adjust the on-off ratio of the solenoid valve 106 every set time after the heater 112 is turned on.

Specifically, referring to FIG. 2 , the controller 108 includes a heater control module 118 and a solenoid valve control module 120 .

The heater control module 118 is used to turn on or turn off the heater 112 . The heater control module 118 can control the heater 112 to work according to the set working mode.

The solenoid valve control module 120 is used to open or close the solenoid valve 106 , and adjust the on-off ratio of the solenoid valve 106 every set time after the heater control module 118 turns on the heater 112 .

For example, when the bottom-mounted steam generator 100 starts to work, the solenoid valve control module 120 opens the solenoid valve 106, so that the water tank 104 pre-fills a certain amount of water into the water container 110 to pre-generate a suitable water level. At this time, The heater control module 118 can turn on the heater 112 at the same time or turn on the heater 112 later after the water delivery is completed.

The adjustment parameters for adjusting the on-off ratio of the solenoid valve 106 can be stored in the memory 122, and the memory 122 can be integrated with the controller 108 to save space. The solenoid valve control module 120 adjusts the on-off ratio of the solenoid valve 106 according to the adjustment parameter.

In this embodiment, since the bottom-mounted steam generating device 100 uses the water level drop between the water tank 104 and the water container 110 to supply water, as the operating time of the bottom-mounted steam generating device 100 increases, the water in the water tank 104 will increase. If the solenoid valve 106 works with a fixed on-off ratio, the water supplied to the water container 110 will inevitably become less and less, or even When the water in the water container 110 has already been completely digested by the generator, the water container 110 may be dry-boiled.

Therefore, as shown in FIG. 3 , after the heater control module 118 turns on the heater, the solenoid valve control module 120 adjusts the on-off ratio of the solenoid valve 106 every set time. Specifically, the solenoid valve control module 120 controls and adjusts the parameters every time a set time (this time can be determined according to the component parameters of the bottom-mounted steam generating device 100 and the maximum and minimum values of the water level drop) increases by 1 time unit ( A typical example is 1 second). The solenoid valve control module 120 performs addition and subtraction operations with the current on-off ratio parameter of the solenoid valve 106 and the adjustment parameter according to the adjustment parameter, so as to obtain a new appropriate on-off ratio of the solenoid valve 106 . The on-off ratio parameter of the solenoid valve 106 includes the opening time and closing time of the solenoid valve 106 .

For example, as the running time of the heater 112 increases, the adjustment parameter increases by 1 second every 10 minutes, and the solenoid valve control module 120 subtracts 1 second from the closing time of the solenoid valve 106 every 10 minutes according to the adjustment parameter. , and then increase the on-off ratio of the solenoid valve 106 to maintain a stable water supply.

In this embodiment, the bottom-mounted steam generator 100 includes a timer 124 connected to the controller 108 , and the controller 108 is used to control the timer 124 to start timing when the heater 112 is turned on. The timer 124 can be a countdown timer adopted by the bottom-mounted steam generating device 100 itself or a newly added independent timer. Timer 124 may be integrated with controller 108 . The timer 124 starts counting after the product cooking program begins to operate. After reaching a certain cumulative timing (such as 10 minutes), the solenoid valve control module 120 adjusts the on-off ratio of the solenoid valve 106 to increase positively. After that, the timer 124 is reset to zero and restarts timing.

In practical application, please refer to Fig. 3, during the operation of the bottom-mounted steam generator 100, the height of the water in the water tank 104 does not decrease linearly, because the decrease of the water level causes the electromagnetic valve 106 to operate at the same on-off ratio. , the water supply of the water tank 104 becomes smaller, so the drop of the water level of the water tank 104 will slow down. At the same time, since the setting of the water supply must meet the needs of the most severe cases (such as when the water level drop is close to the minimum water level drop), the solenoid valve generally 106 is mainly based on on-off work, which will cause the water level in the water container 110 to fluctuate a little because of this on-off water supply mode.

More specifically, if the power of the steam generator 102 is 1800W, the solenoid valve 106 is fully open and the water level is at the highest water level drop, the water supply capacity of the bottom-mounted steam generating device 100 is assumed to be 3ml/s, then, if initially the water tank 104 The water is full (that is, the highest water level drop), and the on-off ratio of the solenoid valve 106 can be set as ON: 2s/OFF: 28s. If the water flow of the electromagnetic valve 106 itself is set to be 1.5ml/s when the lowest water level drop, then, when the water in the water tank 104 is close to the lowest water level drop, the on-off ratio of the electromagnetic valve 106 at this time should be set to ON: 2s/OFF: 13s can allow the water supply of the water tank 104 to be in the same state as when the water tank 104 is full of water. And in the process from the water tank 104 full of water to the water level close to the minimum water level drop, that is the process in which the on-off ratio of the solenoid valve 106 is constantly increasing. For example, if it takes 60 minutes (that is, the water consumption is 0.2ml/s) during the process of the water tank 104 from being full to the water level close to the minimum water level drop (assuming that the water consumption in this process is 720 milliliters), then the bottom-mounted steam generating device 100 In every 10 minutes, reduce the closing time of the solenoid valve 106 in the on-off ratio parameter of the solenoid valve 106 by 3 seconds, that is, subtract 15 seconds at the 50th minute, so as to meet the stable water supply requirement of the bottom-mounted steam generator 100.

It should be pointed out that, in the above example control process, when the bottom-mounted steam generating device 100 starts to work, the water level of the water tank 104 starts at the full water position. However, in practical applications, users may not necessarily fill the water tank 104 with water before the bottom-mounted steam generating device 100 starts to work. Therefore, the start position of the water level of the water tank 104 may not be the full water position.

Therefore, in order to make the bottom-mounted steam generating device 100 more practical and have a wider application range, in this embodiment, the bottom-mounted steam generating device 100 includes a water level detection device 126, which is used to detect the water level of the water tank 104. Water level, the controller 108 is used to adjust the on-off ratio of the solenoid valve 106 according to the detected water level of the water tank 104 .

In this embodiment, the water level detection device 126 is a water level sensor, and the water level sensor can be placed in the water tank 104 to detect the water level of the water tank 104 in real time. In other embodiments, the water level detection device 126 can be a weight sensor, and the weight sensor can be arranged outside the water tank 104 to detect the weight of the water tank, and the solenoid valve control module 120 can judge the water level according to the weight of the water tank 104 .

Afterwards, the solenoid valve control module 120 adjusts the on-off ratio of the solenoid valve 106 according to the water level. For example, the solenoid valve control module 120 calculates the time required to reduce the off-time of the solenoid valve 106 . For example, at the beginning, if the water level measured by the water level detection device 126 has only half the height of the full water position, then the solenoid valve control module 120 will reduce the closing time of the solenoid valve 106 by 3 seconds in the first 10 minutes, and the next After 10 minutes, reduce by 4 seconds, and so on.

To sum up, in the bottom-mounted steam generator 100, as the working time of the heater 112 increases, the controller 108 adjusts the on-off ratio of the solenoid valve 106 to adjust the amount of water flowing into the water container 110 from the water tank 104, thereby realizing Adjust the height of the water level in the water container 110, so that the product performance is more stable, no dry burning, and the steam generator 102 works more reliably. At the same time, if the bottom-mounted steam generating device 100 does not have an additional water level detection device 126, the complexity of the system can be reduced, and the increase in production defect rate caused by the quality problems of each component during mass production can be avoided.

In the description of this specification, reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific examples", or "some examples" etc. A specific feature, structure, material, or characteristic described in an embodiment or an example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless specifically defined otherwise.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including substantially concurrently or in reverse order depending on the functions involved, which shall It is understood by those skilled in the art to which the embodiments of the present invention pertain.

The logic and/or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium, For use with instruction execution systems, devices, or devices (such as computer-based systems, systems including processors, or other systems that can fetch instructions from instruction execution systems, devices, or devices and execute instructions), or in conjunction with these instruction execution systems, devices or equipment used. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection with one or more wires (electronic device), portable computer disk case (magnetic device), random access memory (RAM), Read Only Memory (ROM), Erasable and Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, since the program can be read, for example, by optically scanning the paper or other medium, followed by editing, interpretation or other suitable processing if necessary. The program is processed electronically and stored in computer memory.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Those of ordinary skill in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. During execution, one or a combination of the steps of the method embodiments is included.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, each unit may exist separately physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (8)

1. a bottom type steam raising plant, is characterized in that, comprising:

Steam generator, the heater that this steam generator comprises water container and is connected with this water container, this heater is for heating this water container;

Water tank, this water tank is used for supplying water to this water container;

Magnetic valve, this magnetic valve connects this water container and this water tank and break-make for controlling the water route between this water container and this water tank; And

Controller, this controller is used for opening and cutting out this heater, and opens and close this magnetic valve, and after this heater of unlatching, every setting-up time, adjusts the make-to-break ratio of this magnetic valve.

2. bottom type steam raising plant as claimed in claim 1, it is characterized in that, this bottom type steam raising plant comprises:

Timer, this timer connects this controller, and this controller is used for, when opening this heater, controlling this timer and starting timing.

3. bottom type steam raising plant as claimed in claim 1, it is characterized in that, this controller comprises:

Memory, this memory stores the adjustment parameter of this magnetic valve being carried out to make-to-break ratio adjustment, and this controller is according to the make-to-break ratio of this this magnetic valve of adjustment parameter adjustment.

4. bottom type steam raising plant as claimed in claim 1, is characterized in that, the position of this water container is lower than the position of this water tank.

5. bottom type steam raising plant as claimed in claim 1, it is characterized in that, this bottom type steam raising plant comprises:

Condensate tank of dehumidifier, this condensate tank of dehumidifier is for detecting the water level of this water tank, and this controller is used for, according to the water level of this water tank detected, adjusting the make-to-break ratio of this magnetic valve.

6. bottom type steam raising plant as claimed in claim 1, it is characterized in that, this controller comprises:

Heater control module, this heater control module is used for opening or closing this heater;

Solenoid valve control module, this solenoid valve control module is used for opening or closing this magnetic valve, and after this heater control module opens this heater, every a setting-up time, adjusts the make-to-break ratio of this magnetic valve.

7. bottom type steam raising plant as claimed in claim 1, it is characterized in that, this bottom type steam raising plant comprises:

Cooking cavity, this water tank is arranged on the side of this cooking cavity, and this steam generator is arranged on the bottom of this cooking cavity.

8. bottom type steam raising plant as claimed in claim 5, it is characterized in that, this condensate tank of dehumidifier is level sensor or weight sensor.