WO2018107549A1 - 一种蒸箱微波炉一体机 - Google Patents

一种蒸箱微波炉一体机 Download PDF

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Publication number
WO2018107549A1
WO2018107549A1 PCT/CN2017/000556 CN2017000556W WO2018107549A1 WO 2018107549 A1 WO2018107549 A1 WO 2018107549A1 CN 2017000556 W CN2017000556 W CN 2017000556W WO 2018107549 A1 WO2018107549 A1 WO 2018107549A1
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WIPO (PCT)
Prior art keywords
water
steam
cooking chamber
sealed
microwave
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PCT/CN2017/000556
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English (en)
French (fr)
Inventor
付远华
祁亚辉
郑伟
曹骥
茅忠群
诸永定
Original Assignee
宁波方太厨具有限公司
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Application filed by 宁波方太厨具有限公司 filed Critical 宁波方太厨具有限公司
Publication of WO2018107549A1 publication Critical patent/WO2018107549A1/zh

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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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6473—Aspects related to microwave heating combined with other heating techniques combined with convection heating
    • H05B6/6479—Aspects related to microwave heating combined with other heating techniques combined with convection heating using steam
    • 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

Definitions

  • the invention relates to the technical field of kitchen equipment, in particular to a steam box microwave oven integrated machine.
  • the existing steamer microwave oven integrated machine, the steam generating system and the microwave generating system are all disposed in the lower part of the cooking chamber, and the structure of the structure is not very reasonable. Firstly, the overall volume of the steamer microwave oven integrated machine is large, and the steam generating system is large. The internal water-containing road and steam, the microwave generating device needs to work under high-voltage electricity, so the mutual influence and interference between the two are easy to occur, which is not conducive to the use of the whole machine.
  • the embedded cooking device with steaming function generates steam according to the principle that the water in the water tank sequentially passes through the two-way pump and the electromagnetic valve, and enters the heater to generate steam, and the generated steam enters the cooking space for cooking. After the cooking is finished, the excess water of the heater is reversed through the solenoid valve and the two-way pump to be recycled to the water tank.
  • the difficulty of this system is how to control the water level of the heater with low cost and accuracy.
  • the water level is not well controlled, the following two situations will occur: First, when the amount of water in the heater is too small, the heater will not dry in time, and the heater will dry out. The dry burning will have an unpleasant smell and affect the life of the heater. The heater is easy to burn. Bad; the second is that when the water is excessive, the water overflows into the cooking space, and even the water flows out of the cooking space to soak the user's cabinet.
  • the water level of the control heater is mainly used in the following two ways:
  • the first way control the heater water level by program simulation.
  • This method is based on the pump flow control to add water time.
  • a temperature sensor is arranged at the bottom of the heater. The water temperature is obtained through experimental tests. When the sensor temperature is higher than the water temperature, the water is added. To avoid dry burning, but due to the hysteresis of the feedback of the temperature sensor signal, the heater will still dry out; in addition, the change of the pump flow, the individual difference of the heater power fluctuates, and the place where the water hardness is high.
  • the heater is easy to scale, and the scale will cause the heater to heat up abnormally. This method will also cause the method to be not very reliable. The dry burning phenomenon cannot be avoided, the dry burning smell will appear, and the heater life will be greatly affected.
  • the second way design a water box that communicates with the heater, and control the water level by the principle that the water level of the water box and the heater are consistent with each other; then, a buoy is arranged in the water box to convert the position signal floating on the liquid surface into an electric signal. (usually using the principle of a magnet reed switch) to control the level of water in the heater; this method is also susceptible to water quality Influence, when the water hardness is high, the bottom of the heater is prone to scale formation, so that the water level in the water tank and the heater is substantially inconsistent, and it is easy to cause the heater to dry.
  • the technical problem to be solved by the present invention is a steambox microwave oven integrated machine which has a reasonable structural layout and can prevent the steam generating system and the microwave generating system from interfering with each other.
  • a steambox microwave oven integrated machine comprising a box body, a cooking chamber cavity disposed in the box body, and steam disposed in the box body for supplying steam to the cooking chamber cavity a generating system, a microwave generating system disposed in the tank for supplying microwaves in the cooking chamber, a furnace door assembly disposed on the front side of the tank for sealing the cooking chamber, and a steam generating system and microwave generation in the tank a system connected to the control system;
  • the steam generating system includes a steam generator for generating steam, the microwave generating system including a magnetron, a power supply component for supplying power to the magnetron, and a magnetron generating a microwave waveguide device for introducing microwave into the cavity of the cooking chamber;
  • the steam generator is disposed on the top side of the cooking chamber cavity
  • the power component is disposed on the other side of the top of the cooking chamber cavity.
  • the steam generator includes a sealed water container having an electric heater at the bottom, and a water level detecting electrode disposed in the sealed water container for detecting the water level in the sealed water container, wherein the sealing is performed.
  • the top of the water container is provided with a sealed electrode protection chamber communicating with the sealed water container, and the sealed electrode protection chamber is provided with a quantity of air, and the water level detecting electrode is disposed in the sealed electrode protection chamber and the sealed water container, and the water level detecting electrode is The bottom is located in a closed water container.
  • the water level detecting electrode is disposed through the sealed electrode shielding chamber and the sealed water container, thereby increasing the electrode between the metal shell of the steam generator (second electrode)
  • the creepage distance can also effectively reduce the probability of undesired electrode detection loop by extending the creepage distance, so that it can more accurately and reliably adapt to the liquid level detection of all water quality from ultrapure water to super hard water, breaking the water quality limit. To provide users with a better operating experience.
  • the distance between the outer wall of the water level detecting electrode and the inner wall of the electrode hole is 1 mm to 50 mm, and the distance is too close to form a water film between the two, so that an undesired electrode detecting circuit occurs, and if the distance is too far, the water boils. It is easy to bring impurities such as scale into the sealed electrode protection chamber, and an undesired electrode detection circuit can be formed in the sealed electrode protection chamber, resulting in electrode failure.
  • the sealed water container comprises a bottom basin having an opening at the top and an upper cover having a sealing cover disposed at the mouth of the bottom basin, and the electrode hole is disposed on the upper cover.
  • the sealed water container is provided with a ring on the periphery of the water level detecting electrode, which can effectively prevent the influence of the water surface violent fluctuation on the water level detection after the water boils, and improve the water level detection precision.
  • the water level detecting electrode may be provided in plurality, and the height of each bottom of the water level detecting electrode in the sealed water container is different, thereby measuring different water levels of the steam generator.
  • the steamer microwave oven integrated machine of the present invention further comprises a water level detecting circuit, wherein the water level detecting circuit comprises an MCU controller capable of providing a PWM signal, a DC blocking capacitor, a first matching resistor and a second matching resistor, the water level detecting electrode
  • the water level detecting circuit comprises an MCU controller capable of providing a PWM signal, a DC blocking capacitor, a first matching resistor and a second matching resistor, the water level detecting electrode
  • the top of the blocking capacitor is connected to the first end of the DC blocking capacitor, and the second end of the DC blocking capacitor is connected to the first end of the first matching resistor.
  • the second end of the first matching resistor is connected to the MCU controller.
  • the PWM signal output end is connected, the first end of the second matching resistor is connected to the second end of the DC blocking capacitor, and the second end of the second matching resistor is connected with the MCU controller detecting the input signal;
  • the sealed water container is a metal container And the metal container is grounded.
  • the microwave generating system further comprises a water tank, a solenoid valve and a two-way water pump, wherein the water tank is arranged on the right side of the cooking chamber, and the water tank is connected with the steam generator by connecting the two-way water pump and the electromagnetic valve through the connecting pipeline; the electromagnetic valve and The bidirectional water pump is disposed on the left side of the cooking chamber cavity; the magnetron is disposed on the right side of the cooking chamber cavity; and the microwave waveguide is located on the lower side of the cooking chamber cavity.
  • the connecting pipeline comprises a water tank bidirectional pump connecting pipe, a two-way pump solenoid valve connecting pipe, a solenoid valve steam generator connecting pipe and an intake pipe, and the water outlet of the water tank is connected with the bidirectional water pump through the water tank bidirectional pump connecting pipe, two-way
  • the water pump communicates with the solenoid valve through the two-way pump solenoid valve connecting pipe, and the solenoid valve communicates with the steam generator through the solenoid valve steam generator connecting pipe, and the steam outlet of the steam generator communicates with the cooking chamber cavity through the intake pipe; wherein the water tank is connected by the two-way pump
  • the tube and solenoid valve steam generator connection tube is disposed above the cooking chamber cavity and below the steam generator and power supply assembly.
  • the power supply assembly includes a high voltage transformer, a high voltage fuse, a high voltage capacitor, and a high voltage diode.
  • the top of the cooking chamber has an air guiding hood, and the air guiding hood is provided with a constant flow fan.
  • the cooking chamber is provided with a steam outlet on the furnace chamber, and the steam outlet enters the air hood through the exhaust pipe.
  • the cooking chamber cavity comprises a front plate, a U-shaped main body plate and a rear plate.
  • the bottom of the cooking chamber is provided with a microwave inlet for introducing microwaves, and above the microwave inlet, a flat plate for placing cooking food, the cooking chamber cavity
  • the bottom has a U-shaped groove, and the U-shaped groove is provided with an inclined angle so that the condensed water gathers at the rear of the U-shaped groove, and a heating device is installed below the U-shaped groove.
  • a sump of condensed water is installed on the lower side of the furnace door assembly.
  • the invention has the advantages that: by the layout structure, the steam generator and the power supply component for supplying power to the magnetron are respectively disposed on opposite sides of the top of the cooking chamber, and the benefits thereof are more influential to each other.
  • Small the effect of steam on the steam-related components is small.
  • When the steam is working its water or steam is far away from the high-voltage components of the microwave in terms of reliability, which greatly increases the safety and reliability of the product, and passes through the steam generator.
  • the installation greatly reduces the depth of the whole machine. On the one hand, it better adapts to the installation of the cabinet. On the other hand, because the volume of the cavity of the cooking chamber is constant, the heat preservation effect of the whole machine is better, and the installation is greatly improved. Steam cooking efficiency.
  • FIG. 1 is a front view of a steamer microwave oven integrated machine according to an embodiment of the present invention
  • FIG. 2 is a schematic perspective structural view of a cooking chamber cavity in a steamer microwave oven integrated machine according to an embodiment of the present invention
  • FIG 3 is a schematic perspective view of a steamer microwave oven integrated machine according to an embodiment of the present invention (the door assembly is opened);
  • FIG. 4 is a schematic view showing the internal structure of a steamer microwave oven integrated machine according to an embodiment of the present invention.
  • FIG. 5 is a schematic view showing the internal structure of another embodiment of a steamer microwave oven integrated machine according to an embodiment of the present invention.
  • FIG. 6 is a schematic view showing the internal structure of a rear side view of a steamer microwave oven integrated machine according to an embodiment of the present invention
  • FIG. 7 is a schematic perspective structural view of a steam generating device according to an embodiment of the present invention.
  • Figure 8 is a schematic view showing the internal structure of a steam generating device according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a water level detecting circuit according to an embodiment of the present invention.
  • the steamer microwave oven integrated machine comprises a casing 1, a cooking chamber furnace chamber 11 disposed in the casing 1, and a steam generating system disposed in the casing 1 for supplying steam to the cooking chamber furnace chamber 11, and is disposed in the casing a microwave generating system for supplying microwaves to the cooking chamber chamber 11 , a furnace door assembly 4 for sealing the cooking chamber chamber 11 on the front side of the casing 1 , and a steam generating system and microwaves disposed in the casing 1
  • the control system in which the system is connected.
  • the steam generating system comprises a steam generator 2 for generating steam, a water tank 2-1, a solenoid valve 2-3, a connecting pipe and a two-way water pump 2-4, and the steam generator 2 is arranged in the cooking chamber cavity 11
  • the water tank 2-1 is disposed on the right side of the cooking chamber cavity 11
  • the electromagnetic valve 2-3 and the two-way water pump 2-4 are disposed on the left side of the cooking chamber furnace chamber 11
  • the connecting pipeline includes the water tank two-way pump connecting tube 2 -9, two-way pump solenoid valve connecting pipe 2-10, solenoid valve steam generator connecting pipe 2-11 and intake pipe 2-12, the water outlet of the water tank 2-1 through the water tank two-way pump connecting pipe 2-9 and the two-way water pump 2 -4 communication
  • the two-way water pump 2-4 is connected to the solenoid valve 2-3 through the two-way pump solenoid valve connecting pipe 2-10
  • the solenoid valve 2-3 is connected to the steam generator 2 through the solenoid valve steam generator connecting pipe 2-11
  • the steam generator 2 is provided with a steam outlet 1-6, and the steam outlet 1-6 enters the air duct 8 through the air outlet tube 2-13. See Figures 1, 2, 4, and 6.
  • the water tank bidirectional pump connecting tube 2-9 and the solenoid valve steam generator connecting tube 2-11 are disposed above the cooking chamber chamber 1 and are located below the steam generator 2 and the power supply assembly.
  • the two-way water pump 2-4 uses a two-way gear pump, and the two-way water pump 2-4 can not only pump the water in the water box assembly 2-1 into the steam generator 2, but also generate steam after the work is completed. The remaining water in the device 2 is all pumped back into the return water tank assembly 2-1, thereby avoiding the problem that the water quality is deteriorated when the customer does not use the integrated machine for a long time.
  • the waterway system uses only one solenoid valve 2-3 and one two-way water pump 2-4 to complete the pumping and returning water movements, greatly reducing one
  • the cost of the water system of the body machine is lower than that of the two-way solenoid valve and the water pump system that completes the pumping and returning operations, which reduces the complexity of the system and ultimately improves the water system. reliability.
  • the microwave generating system comprises a power supply assembly consisting of a high voltage transformer 3-1, a high voltage fuse 3-2, a high voltage capacitor 3-3, a high voltage diode 3-4, a magnetron 3-5 and a microwave waveguide device 1-4, a power supply assembly Power is supplied to the magnetron 3-5, the power supply unit is disposed at the top right side of the cooking chamber chamber 11, the magnetron 3-5 is disposed at the right side of the cooking chamber chamber 11, and the microwave waveguide unit 1-4 is located at the cooking chamber
  • the lower side of the furnace chamber 11 has a microwave inlet port 3-7 at the bottom of the cooking chamber, and a microwave agitator 3-6 at the microwave inlet port 3-7 for agitating the microwave to improve the uniformity of the microwave field.
  • the above layout structure, the microwave generating system and the steam generating system each occupy one side, the advantage of which is less influence on each other, the influence of the microwave-related components on the steam-related components is small, and the water or steam in the steam working is far away from the reliability.
  • the high-voltage components of the microwave greatly increase the safety and reliability of the product.
  • the steam generator is placed on the upper part, which greatly reduces the depth of the whole machine. On the one hand, it is better adapted to the installation of the cabinet, and on the other hand, because the volume of the cooking chamber is constant, the whole machine insulation effect is maintained. Better, greatly improving the cooking efficiency of steam.
  • the steam generator 2 includes a sealed water container having an electric heater at the bottom, the sealed water container including a bottom basin 2-5 having an opening at the top and an upper cover 2-7 having a sealing cover provided at the mouth of the bottom basin, a water level detecting electrode 2-8 for detecting a water level in the sealed water container in the sealed water container, and a sealing electrode protection chamber 2-14 connected to the sealed water container at the top of the sealed water container, the sealed water container and the sealing electrode
  • the protective chambers 2-14 are connected through the electrode holes 2-15, the electrode holes 2-15 are disposed on the upper cover 2-7, the sealed electrode protection chamber 2-14 is provided with quantitative air, and the water level detecting electrodes 2-8 are arranged through In the sealed electrode protection chamber and the sealed water container, and the water level detecting electrode passes through the electrode holes 2-15 and the bottom portion is located in the sealed water container.
  • the sealed electrode protection chamber 2-14 has a lower electrode hole and a space other than the electrode cavity, and the other part is sealed, and a quantitative air is provided inside, and the beneficial effect is that the air pressure inside the sealed electrode protection chamber 2-14
  • the utility model can effectively reduce the excessive water added to the sealed water container or bring the impurities such as scale into the sealed electrode protection cavity after the internal water boils, so that an undesired electrode detection circuit is formed in the sealed electrode protection cavity, resulting in electrode failure.
  • the water level monitoring inside the sealed water container can be realized with the corresponding detection circuit to achieve the purpose of preventing dry burning.
  • the distance between the outer wall of the water level detecting electrode 2-8 and the inner wall of the electrode hole 2-15 is 1 mm to 50 mm, and the distance is too close to form a water film between the two, and an undesired electrode detecting circuit occurs. If the distance is too far, the water boils. It is easy to bring impurities such as scale into the sealed electrode protection cavity, and an undesired electrode detection circuit can be formed in the sealed electrode protection cavity, resulting in failure of the water level detecting electrode.
  • the sealed water container is provided with a flap 2-6 located at the periphery of the water level detecting electrode.
  • the steamer microwave oven integrated machine in this embodiment further comprises a water level detecting circuit, wherein the water level detecting circuit comprises an MCU controller capable of providing a PWM signal, a DC blocking capacitor C1, a first matching resistor R1 and a second matching resistor R2, and the MCU controls
  • the device is disposed in the control system; the top of the water level detecting electrode passes through the sealed electrode protection cavity and is connected to the first end of the DC blocking capacitor C1, and the second end of the DC blocking capacitor C1 and the first end of the first matching resistor R1 Connected, the second end of the first matching resistor R1 is connected to the PWM signal output end of the MCU controller, the first end of the second matching resistor R2 is connected to the second end of the DC blocking capacitor C1, and the second matching resistor R2 is second.
  • the water level detecting circuit comprises an MCU controller capable of providing a PWM signal, a DC blocking capacitor C1, a first matching resistor R1 and a second matching resistor R2, and the MCU controls
  • the end is connected to the MCU controller for detecting the input signal end;
  • the sealed water container is a metal container, and the metal container is grounded.
  • Use pure AC signal as electrode The detected excitation signal ensures that the excitation signal is as free or contains a small amount of DC signal through the DC blocking capacitor C1.
  • the PWM signal provided by the MCU controller passes through the first matching resistor R1, the DC blocking capacitor C1, and the electrode ⁇ water ⁇
  • the common ground (such as the metal casing of the machine) forms a loop; the impedance between the electrode ⁇ water ⁇ common ground is set to RV1, and when
  • the water level detecting electrode 3 can be made of stainless steel, and the water level in the sealed water container can be inspected by positioning the bottom of the water level detecting electrode 3 at a desired water level.
  • the impedance values of the water level detecting electrode 2-8, the water, and the metal casing are small, and the water in the steam generator is immersed in the water level electrode.
  • the impedance value of the water level electrode 2-8, the water, and the metal casing is large, and the water level detecting circuit can judge that there is no water in the steam generator 2.
  • a plurality of water level detecting electrodes 2-8 may be provided, and the height of the bottom of each water level detecting electrode in the sealed water container is different.
  • the water level detecting electrodes 2-8 are made of a corrosion-resistant electrically conductive material, and preferably, the material of the water level electrodes 2-8 is made of stainless steel.
  • the top of the cooking chamber of the steamer microwave oven has an air guiding cover 8 on the top, and the air guiding cover 8 is provided with a constant flow fan 9.
  • the cooking chamber cavity 1 is provided with a plurality of through holes. As the steam outlets 1-6, the steam and air in the cooking chamber chamber 11 enter the air hood 8 through the exhaust pipes 2-13 during the operation of the integrated machine, and are finally accelerated by the wind blown by the cross flow fan 9.
  • the cooking chamber cavity 1 is made of a metal material for shielding microwave leakage, and the cooking chamber cavity 1 includes a front plate 1-1, a main body U plate 1-2 and a rear plate 1-3, and a waveguide assembly 1-4, a furnace
  • the chamber 1 has a steam inlet 1-5 and a steam outlet 1-6 for water vapor and air to enter and exit the cooking chamber chamber 1.
  • a microwave inlet 3-7 is provided at the bottom of the chamber 1 for microwave, microwave Above the inlet 3-7 there is a plate 7 for placing the cooked food, and the plate 7 is made of a non-absorbable microwave material which is resistant to high temperatures.
  • the plate 7 material is glass ceramic or borosilicate glass.
  • the bottom of the cooking chamber cavity 1 has a U-shaped groove 1-7, and the U-shaped groove 1-7 has an inclined angle so that the condensed water gathers at the rear of the U-shaped groove 1-7, and the U-shaped groove 1-7 is installed below.
  • a heat conductive substance is filled between the U-shaped grooves 1-7 and the heating device 10 to ensure that the heat energy generated by the heating device 10 is quickly transmitted to the U-shaped grooves 1-7.
  • the material of the heat conductive substance is graphite sheet or thermal grease, as shown in FIGS. 1, 2 and 6.
  • a sump 17 for condensing water is installed on the lower side of the furnace door assembly 4 for collecting a small amount of condensed water flowing down when the furnace door is opened.

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  • Food Science & Technology (AREA)
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Abstract

一种蒸箱微波炉一体机，包括箱体(1)、蒸汽发生系统、微波发生系统、炉门组件(4)、与蒸汽发生系统和微波发生系统连接的控制系统，其中，蒸汽发生系统包括用于产生蒸汽的蒸汽发生器(2)，蒸汽发生器(2)设置在烹饪室炉腔(11)顶部一侧，微波发生系统包括磁控管(3-5)、电源组件和微波波导装置(1-4)，电源组件设置在烹饪室炉腔(11)顶部另一侧。结构布局合理，能使蒸汽发生系统与微波发生系统之间不会相互干扰。

Description

一种蒸箱微波炉一体机 技术领域
本发明涉及厨房设备的技术领域，特别涉及一种蒸箱微波炉一体机。
背景技术
随着人们生活品质的提高，厨房电器越来越丰富，微波炉、烤箱、蒸箱等都逐渐成为家庭生活必需的厨电产品。为了节省厨房空间，现已有将蒸功能和微波功能结合的蒸箱微波炉一体机。
现有的蒸箱微波炉一体机，蒸汽发生系统、微波发生系统均设置在烹饪室炉腔下部，这种结构布局不是很合理，首先会使蒸箱微波炉一体机整体体积较大，而且蒸汽发生系统内含水路和蒸汽，微波发生装置则需要在高压电下工作，因此两者之间容易产生相互影响和干扰，不利于整机使用。
另外，目前市售的使用电极检水位的蒸箱或其他带有蒸功能的烹饪设备，对水质都有较高要求，即不能使用纯净水或高硬度水，这使得蒸箱的使用受到一定限制，给用户带来了不方便。带有蒸功能的嵌入式烹饪设备，其产生蒸汽的原理为：水箱的水依次通过双向泵、电磁阀，进入加热器产生蒸汽，产生的蒸汽进入烹饪空间进行烹饪。烹饪结束后加热器多余的水再反向通过电磁阀、双向泵，回收到水箱，此系统的难点是如何低成本，精确可靠的控制加热器的水位。水位控制不好会出现以下两种情况：一是加热器水量过少的时候不能及时加水会出现加热器干烧现象，干烧会出现难闻的气味，同时影响加热器寿命，加热器易烧坏；二是加水过量时，水溢出到烹饪空间，甚至水从烹饪空间流出浸泡用户家橱柜等。
现有的带有蒸功能的烹饪设备中，控制加热器的水位主要通过以下两种方式：
第一种方式：通过程序模拟控制加热器水位，此方法是根据水泵流量控制加水时间，另外在加热器底部布置一个温度传感器，通过实验测试得到加水温度，当传感器温度高于加水温度时就加水，避免出现干烧现象，但是由于温度传感器信号的反馈会出现滞后性，因此加热器照样会出现干烧现象；另外水泵流量的变化，加热器功率的个体差异波动，还有水质硬度高的地方加热器容易结水垢，有水垢会造成加热器传热不正常，同样会造成此种方法不是很可靠，干烧现象不能避免，出现干烧气味，且对加热器寿命有较大影响。
第二种方式：设计一个与加热器连通的水盒，通过水盒与加热器两边水面高度一致原理控制水位；然后在水盒中设置有浮标，将液面上下浮动的位置信号转换成电信号(通常是利用磁铁干簧管原理)，从而控制加热器内水位的高低；这种方式也容易受到水质 影响，当水硬度高时，加热器底部容易结水垢，这样水盒与加热器内的水位，实质是不一致的，也容易使加热器出现干烧现象。
发明内容
本发明所要解决的技术问题是一种结构布局合理、能使蒸汽发生系统与微波发生系统之间不会相互干扰的蒸箱微波炉一体机。
本发明解决上述技术问题所采用的技术方案为：一种蒸箱微波炉一体机，包括箱体、设置在箱体内的烹饪室炉腔、设置在箱体内用于给烹饪室炉腔提供蒸汽的蒸汽发生系统、设置在箱体内用于烹饪室炉腔提供微波的微波发生系统、设置在箱体前侧用于密封烹饪室炉腔的炉门组件、及设置在箱体内与蒸汽发生系统和微波发生系统连接的控制系统；其中，所述蒸汽发生系统包括用于产生蒸汽的蒸汽发生器，所述微波发生系统包括磁控管、为磁控管提供电源的电源组件、用于将磁控管产生的微波导入烹饪室炉腔的微波波导装置；
其特征在于：所述蒸汽发生器设置在烹饪室炉腔顶部一侧，所述电源组件设置在烹饪室炉腔顶部另一侧。
作为改进，所述蒸汽发生器包括底部设有电加热器的密闭盛水容器，设置在密闭盛水容器内的用于检测密闭盛水容器内水位的水位检测电极，其特征在于：所述密闭盛水容器顶部设有与密闭盛水容器连通的密封电极防护腔，密封电极防护腔内设有定量空气，水位检测电极贯穿设置在密封电极防护腔和密闭盛水容器内，且水位检测电极的底部位于密闭盛水容器内。通过在密闭盛水容器顶部设置密封电极防护腔，将水位检测电极贯穿设置在密封电极防护腔和密闭盛水容器内，从而增长了电极到蒸汽发生器金属壳体(第二电极)之间的爬电距离，通过延长爬电距离也能有效减少出现不期望电极检测回路的概率，从而能够更准确可靠、更广泛的适应从超纯水到超硬水的所有水质的液位检测，打破水质限制，为用户提供更好的操作感受。
再改进，所述密闭盛水容器与密封电极防护腔之间通过电极孔连通，所述水位检测电极穿设于前述电极孔内。在电极腔内部气压作用下，可有效减少密闭盛水容器加水过多或其内部水沸腾后将水垢等杂质带入密封电极防护腔，使得密封电极防护腔内形成不期望的电极检测回路，导致水位检测电极失效。
再改进，所述水位检测电极外壁与电极孔内壁之间的距离为1mm到50mm，距离太近易在两者间形成水膜，从而出现不期望的电极检测回路，距离太远的话水沸腾后容易使将水垢等杂质带入密封电极防护腔，也能使得密封电极防护腔内形成不期望的电极检测回路，导致电极失效。
再改进，所述密闭盛水容器包括顶部具有开口的底盆和密封盖设于底盆口部的上盖，所述电极孔设于上盖上。
所述密闭盛水容器内设有一圈位于水位检测电极外围的挡片，可以有效防止水沸腾后水面剧烈波动对水位检测的影响，提高水位检测精度。
水位检测电极可以设有多个，每个水位检测电极底部位于密闭盛水容器内的高度不相同，从而测量蒸汽发生器的不同水位。
再改进，本发明的蒸箱微波炉一体机还包括水位检测电路，该水位检测电路包括能提供PWM信号的MCU控制器、隔直电容、第一匹配电阻和第二匹配电阻，所述水位检测电极的顶部穿过密封电极防护腔后与隔直电容的第一端连接，隔直电容的第二端与第一匹配电阻的第一端连接，第一匹配电阻的第二端与MCU控制器的PWM信号输出端连接，第二匹配电阻的第一端与隔直电容的第二端连接，第二匹配电阻的第二端与MCU控制器检测输入信号连接；所述密闭盛水容器为金属容器，且该金属容器接地。
再改进，所述微波发生系统还包括水箱、电磁阀及双向水泵，水箱设置在烹饪室炉腔右侧，水箱通过连接管路依次连接双向水泵和电磁阀后与蒸汽发生器连通；电磁阀及双向水泵设置在烹饪室炉腔的左侧；所述磁控管设置在烹饪室炉腔的右侧；微波波导装置位于烹饪室炉腔的下侧。
再改进，所述的连接管路包括水箱双向泵连接管、双向泵电磁阀连接管、电磁阀蒸汽发生器连接管和进气管，水箱的出水口通过水箱双向泵连接管与双向水泵连通，双向水泵通过双向泵电磁阀连接管与电磁阀连通，电磁阀通过电磁阀蒸汽发生器连接管与蒸汽发生器连通，蒸汽发生器的蒸汽出口通过进气管与烹饪室炉腔连通；其中水箱双向泵连接管和电磁阀蒸汽发生器连接管穿设于烹饪室炉腔的上方，且位于蒸汽发生器和电源组件的下方。
所述电源组件包括高压变压器、高压保险管、高压电容和高压二极管。
所述烹饪室炉腔顶部具有一导风罩，导风罩上装一贯流风机，烹饪室炉腔烹饪室炉腔上布有蒸汽出口，蒸汽出口通过排气管进入导风罩。
所述烹饪室炉腔包括前板、U形主体板及后板，烹饪室炉腔底部设有微波入口用于通入微波，微波入口上方设有用于放置烹饪的食物的平板，烹饪室炉腔底部有U形凹槽，U形凹槽设有倾斜角度，以便冷凝水在U形凹槽后部聚集，U形凹槽下方安装有加热装置。
所述炉门组件下侧装有冷凝水的集水槽。
与现有技术相比，本发明的优点在于：通过此布局结构，将蒸汽发生器和为磁控管提供电源的电源组件分别设置在烹饪室炉腔顶部相对侧，其好处为相互间影响更小，微波工作时对蒸汽相关元件的影响小，蒸汽工作时其水或汽从可靠性方面来说远离了微波的高压元件，大大增加了产品的安全性及可靠性，同时通过蒸汽发生器上置，大大缩小了整机的深度空间，一方面更好的适应了橱柜的安装，另一方面由于在保证烹饪室炉腔容积不变的情况下，其整机保温效果更佳，大大提高了蒸汽的烹饪效率。
附图说明
图1为本发明实施例中蒸箱微波炉一体机的主视图；
图2为本发明实施例中蒸箱微波炉一体机中烹饪室炉腔的立体结构示意图；
图3为本发明实施例中蒸箱微波炉一体机的立体结构示意图(炉门组件打开)；
图4为本发明实施例中蒸箱微波炉一体机的内部结构示意图；
图5为本发明实施例中蒸箱微波炉一体机另一视角的内部结构示意图；
图6为本发明实施例中蒸箱微波炉一体机后侧视角的内部结构示意图；
图7为本发明实施例中蒸汽产生装置的立体结构示意图；
图8为本发明实施例中蒸汽产生装置的内部结构示意图；
图9为本发明实施例中水位检测电路原理图。
具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
如图1-9所示，为本发明的蒸箱微波炉一体机一个优选实施例。该蒸箱微波炉一体机，包括箱体1、设置在箱体1内的烹饪室炉腔11，设置在箱体1内用于给烹饪室炉腔11提供蒸汽的蒸汽发生系统、设置在箱体1内用于烹饪室炉腔11提供微波的微波发生系统、设置在箱体1前侧用于密封烹饪室炉腔11的炉门组件4、及设置在箱体1内与蒸汽发生系统和微波发生系统连接的控制系统。
其中，所述蒸汽发生系统包括用于产生蒸汽的蒸汽发生器2、水箱2-1、电磁阀2-3、连接管路及双向水泵2-4，蒸汽发生器2设置在烹饪室炉腔11顶部左侧，水箱2-1设置在烹饪室炉腔11右侧，电磁阀2-3及双向水泵2-4设置在烹饪室炉腔11的左侧；连接管路包括水箱双向泵连接管2-9、双向泵电磁阀连接管2-10、电磁阀蒸汽发生器连接管2-11和进气管2-12，水箱2-1的出水口通过水箱双向泵连接管2-9与双向水泵2-4连通，双向水泵2-4通过双向泵电磁阀连接管2-10与电磁阀2-3连通，电磁阀2-3通过电磁阀蒸汽发生器连接管2-11与蒸汽发生器2连通，蒸汽发生器2的蒸汽出口通过进气管2-12与烹饪室炉腔11连通，蒸汽发生器2设有蒸汽出口1-6，蒸汽出口1-6通过出气管2-13进入导风罩8，参见图1、2、4、6所示。其中水箱双向泵连接管2-9和电磁阀蒸汽发生器连接管2-11穿设于烹饪室炉腔1的上方，且位于蒸汽发生器2和电源组件的下方。
本实施例中，双向水泵2-4使用双向齿轮泵，双向水泵2-4不仅可正向将水盒组件2-1里的水抽入蒸汽发生器2，也可在工作完成后将蒸汽发生器2内的剩余水全部回抽到回水盒组件2-1中，避免了客户长期不用一体机时水质变味的问题。同时该水路系统仅使用一个电磁阀2-3和一个双向水泵2-4即可完成抽水和回水的动作，大大减少了一 体机水路系统的成本，同时相比于两路电磁阀和水泵分别完成抽水和回水动作的水路系统来说，由于减少了许多元器件，降低了系统的复杂度，最终提升了水路系统的可靠性。
微波发生系统包括由高压变压器3-1、高压保险管3-2、高压电容3-3、高压二极管3-4组成的电源组件，磁控管3-5和微波波导装置1-4，电源组件为磁控管3-5提供电源，电源组件设置在烹饪室炉腔11的顶部右侧，磁控管3-5设置在烹饪室炉腔11的右侧；微波波导装置1-4位于烹饪室炉腔11的下侧；烹饪室炉腔的底部有一微波进入口3-7，微波进入口3-7处有一微波搅拌器3-6用于搅拌微波，提高了微波场的均匀性。
上述布局结构，微波发生系统与蒸汽发生系统各占一侧，其好处为相互间影响更小，微波工作时对蒸汽相关元件的影响小，蒸汽工作时其水或汽从可靠性方面来说远离了微波的高压元件，大大增加了产品的安全性及可靠性。同时通过蒸汽发生器上置，大大缩小了整机的深度空间，一方面更好的适应了橱柜的安装，另一方面由于在保证烹饪室炉腔容积不变的情况下，其整机保温效果更佳，大大提高了蒸汽的烹饪效率。
蒸汽发生器2包括底部设有电加热器的密闭盛水容器，该密闭盛水容器包括顶部具有开口的底盆2-5和密封盖设于底盆口部的上盖2-7，设置在密闭盛水容器内的用于检测密闭盛水容内水位的水位检测电极2-8，密闭盛水容器顶部设有与密闭盛水容器连通的密封电极防护腔2-14，密闭盛水容器与密封电极防护腔2-14之间通过电极孔2-15连通，电极孔2-15设于上盖2-7上，密封电极防护腔2-14内设有定量空气，水位检测电极2-8贯穿设置在密封电极防护腔和密闭盛水容器内，且水位检测电极穿过前述电极孔2-15后、底部位于密闭盛水容器内。密封电极防护腔2-14除了有下方的电极孔及与电极腔体以外的空间相连外，其余部分密封，内部设有定量空气，其有益作用是，在密封电极防护腔2-14内部气压作用下，有效减少密闭盛水容器加水过多或其内部水沸腾后将水垢等杂质带入密封电极防护腔，使得密封电极防护腔内形成不期望的电极检测回路，导致电极失效。配合相应检测电路实现对密闭盛水容器内部水位监测，实现防干烧的目的。水位检测电极2-8外壁与电极孔2-15内壁之间的距离为1mm到50mm，距离太近易在两者间形成水膜，出现不期望的电极检测回路，距离太远的话水沸腾后容易使将水垢等杂质带入密封电极防护腔，也能使得密封电极防护腔内形成不期望的电极检测回路，导致水位检测电极失效。密闭盛水容器内设有位于水位检测电极外围的挡片2-6。
本实施例中的蒸箱微波炉一体机还包括水位检测电路，该水位检测电路包括1能提供PWM信号的MCU控制器、隔直电容C1、第一匹配电阻R1和第二匹配电阻R2，MCU控制器设置在控制系统内；所述水位检测电极的顶部穿过密封电极防护腔后与隔直电容C1的第一端连接，隔直电容C1的第二端与第一匹配电阻R1的第一端连接，第一匹配电阻R1的第二端与MCU控制器的PWM信号输出端连接，第二匹配电阻R2的第一端与隔直电容C1的第二端连接，第二匹配电阻R2的第二端与MCU控制器检测输入信号端连接；所述密闭盛水容器为金属容器，且该金属容器接地。使用纯交流信号作为电极 检测的激励信号，通过隔直电容C1保证激励信号尽可能的不含或含有少量的直流信号，由MCU控制器提供的PWM信号，经过第一匹配电阻R1，隔直电容C1，通过电极→水→公共地(如机器的金属壳体)形成回路；将电极→水→公共地间的阻抗设为RV1，且当|RV1|＞＞｜1/(C1·S)|时：U(S)≈RV1/(R1+RV1)，U(S)为MCU控制器检测输入信号端的交流电压分量传递函数；由上述公式①可知，只要选择恰当的R1，使得R1落入有水情况下RV1的阻抗值范围内，即可灵敏的通过U(S)判断是否存在水回路。水位检测电极3可采用不锈钢制成，通过将水位检测电极3的底部位于所需水位，进而检查密闭盛水容器内的水位。
当蒸汽发生器2内的水位浸没水位检测电极2-8而导通，此时水位检测电极2-8、水、和金属外壳组成的阻抗值较小，当蒸汽发生器内水就浸没水位电极2-8而断开，此时水位电极2-8、水、和金属外壳组成的阻抗值较大，通过上述水位检测电路，就可以判蒸汽发生器2中有无水。同时为了判断蒸汽发生器2内不同水位的高低，可以设置多个水位检测电极2-8，每个水位检测电极底部位于密闭盛水容器内的高度不相同。水位检测电极2-8采用耐腐蚀的可导电材料制造而成，优选地，水位电极2-8的材料使用不锈钢。
另外，本实施例中的蒸箱微波炉一体机烹饪室炉腔11顶部具有一导风罩8，导风罩8上装一贯流风机9，烹饪室炉腔1上布有若干通孔密布的通口作为蒸汽出口1-6，一体机工作时烹饪室炉腔11内的蒸汽和空气通过排气管2-13进入导风罩8，最终被贯流风机9所吹出的风加速排走。
烹饪室炉腔1由金属材料制成的，用以屏蔽微波泄漏，烹饪室炉腔1包括前板1-1、主体U板1-2及后板1-3以及波导组件1-4，炉腔1上具有一蒸汽入口1-5和一蒸汽出口1-6用于水蒸气和空气通入与排出烹饪室炉腔1，炉腔1底部有一微波入口3-7用于通入微波，微波入口3-7上方有一平板7用于放置烹饪的食物，平板7用可耐高温的非吸收微波材料制成，优选的，平板7材料为微晶玻璃或高硼硅玻璃。烹饪室炉腔1底部有一U形凹槽1-7，U形凹槽1-7有一倾斜角度，以便冷凝水在U形凹槽1-7后部聚集，U形凹槽1-7下面安装有一加热装置10，可对冷凝水进行加热，以减少烹饪室炉腔1内的冷凝水。在U形凹槽1-7与加热装置10之间填充有易导热物质，以确保加热装置10产生的热能迅速传至U形凹槽1-7处。优选地，该易导热物质的材料为石墨片或者导热硅脂，参见图1、2、6所示。烹饪室炉腔11前侧，炉门组件4下侧装有一冷凝水的集水槽17，用于收集炉门打开时流下的少量冷凝水。

Claims (14)

  1. 一种蒸箱微波炉一体机，包括箱体(1)、设置在箱体(1)内的烹饪室炉腔(11)、设置在箱体(1)内用于给烹饪室炉腔(11)提供蒸汽的蒸汽发生系统、设置在箱体(1)内用于烹饪室炉腔(11)提供微波的微波发生系统、设置在箱体(1)前侧用于密封烹饪室炉腔(11)的炉门组件(4)、及设置在箱体(1)内与蒸汽发生系统和微波发生系统连接的控制系统；
    其中，所述蒸汽发生系统包括用于产生蒸汽的蒸汽发生器(2)，所述微波发生系统包括磁控管(3-5)，为磁控管(3-5)提供电源的电源组件和用于将磁控管(3-5)产生的微波导入烹饪室炉腔(11)的微波波导装置(1-4)；
    其特征在于：所述蒸汽发生器(2)设置在烹饪室炉腔(11)顶部一侧，所述电源组件设置在烹饪室炉腔(11)顶部另一侧。
  2. 根据权利要求1所述的蒸箱微波炉一体机，其特征在于：所述蒸汽发生器(2)包括底部设有电加热器的密闭盛水容器、设置在密闭盛水容器内的用于检测密闭盛水容器内水位的水位检测电极(28)，所述密闭盛水容器顶部设有与密闭盛水容器连通的密封电极防护腔(2-14)，密封电极防护腔内设有定量空气，水位检测电极(2-8)贯穿设置在密封电极防护腔(2-14)和密闭盛水容器内，且水位检测电极(2-8)的底部位于密闭盛水容器内。
  3. 根据权利要求2所述的蒸箱微波炉一体机，其特征在于：所述密闭盛水容器与密封电极防护腔(2-14)之间通过电极孔(2-15)连通，所述水位检测电极(2-8)穿设于前述电极孔(2-15)内。
  4. 根据权利要求3所述的蒸箱微波炉一体机，其特征在于：所述水位检测电极(2-8)外壁与电极孔(2-15)内壁之间的距离为1mm到50mm。
  5. 根据权利要求3所述的蒸箱微波炉一体机，其特征在于：所述密闭盛水容器包括顶部具有开口的底盆(2-5)和密封盖设于底盆口部的上盖(2-7)，所述电极孔(2-15)设于上盖(2-7)上。
  6. 根据权利要求2所述的蒸箱微波炉一体机，其特征在于：所述密闭盛水容器内设有位于水位检测电极外围的挡片(2-6)。
  7. 根据权利要求2所述的蒸箱微波炉一体机，其特征在于：所述水位检测电极(2b)设有多个，每个水位检测电极(2b)底部位于密闭盛水容器内的高度不相同。
  8. 根据权利要求1所述的蒸箱微波炉一体机，其特征在于：还包括水位检测电路，该水位检测电路包括能提供PWM信号的MCU控制器、隔直电容(C1)、第一匹配电阻(R1)和第二匹配电阻(R2)，MCU控制器设置在控制系统内；所述水位检测电极的顶部穿过密封电极防护腔后与隔直电容(C1)的第一端连接，隔直电容(C1)的第二端与第一匹配电阻(R1)的第一端连接，第一匹配电阻(R1)的第二端与MCU控制器的PWM信号输出端连接，第二匹配电阻(R2)的第一端与隔直电容(C1)的第二端连接，第二匹配电阻(R2)的第二端与MCU控制器检测输入信号连接；所述密闭盛水容器为金属容器，且该金属 容器接地。
  9. 根据权利要求1所述的蒸箱微波炉一体机，其特征在于：所述微波发生系统还包括水箱(2-1)、电磁阀(2-3)及双向水泵(2-4)，水箱(2-1)设置在烹饪室炉腔(11)右侧，水箱(2-1)通过连接管路依次连接双向水泵(2-4)和电磁阀(2-3)后与蒸汽发生器(2)连通；电磁阀(2-3)及双向水泵(2-4)设置在烹饪室炉腔(11)的左侧；所述磁控管(3-5)设置在烹饪室炉腔(11)的右侧；微波波导装置(1-4)位于烹饪室炉腔(11)的下侧。
  10. 根据权利要求9所述的蒸箱微波炉一体机，其特征在于：所述的连接管路包括水箱双向泵连接管(2-9)、双向泵电磁阀连接管(2-10)、电磁阀蒸汽发生器连接管(2-11)和进气管(2-12)，水箱(2-1)的出水口通过水箱双向泵连接管(2-9)与双向水泵(2-4)连通，双向水泵(2-4)通过双向泵电磁阀连接管(2-10)与电磁阀(2-3)连通，电磁阀(2-3)通过电磁阀蒸汽发生器连接管(2-11)与蒸汽发生器(2)连通，蒸汽发生器(2)的蒸汽出口通过进气管(2-12)与烹饪室炉腔(11)连通；其中水箱双向泵连接管(2-9)和电磁阀蒸汽发生器连接管(2-11)穿设于烹饪室炉腔(1)的上方，且位于蒸汽发生器(2)和电源组件的下方。
  11. 根据权利要求1所述的蒸箱微波炉一体机，其特征在于：所述电源组件包括高压变压器(3-1)、高压保险管(3-2)、高压电容(3-3)和高压二极管(3-4)。
  12. 根据权利要求1所述的蒸箱微波炉一体机，其特征在于：所述烹饪室炉腔(11)顶部具有一导风罩(8)，导风罩(8)上装一贯流风机(9)，烹饪室炉腔烹饪室炉腔(11)上布有蒸汽出口(1-6)，蒸汽出口(1-6)通过排气管(2-13)进入导风罩(8)。
  13. 根据权利要求1所述的蒸箱微波炉一体机，其特征在于：所述烹饪室炉腔(11)包括前板(1-1)、U形主体板(1-2)及后板(1-3)，烹饪室炉腔(11)底部设有微波入口(3-7)用于通入微波，微波入口(3-7)上方设有用于放置烹饪的食物的平板(7)，烹饪室炉腔(11)底部有U形凹槽(1-7)，U形凹槽(1-7)设有倾斜角度，以便冷凝水在U形凹槽(1-7)后部聚集，U形凹槽(1-7)下方安装有加热装置(10)。
  14. 根据权利要求1所述的蒸箱微波炉一体机，其特征在于：所述炉门组件(4)下侧装有冷凝水的集水槽(17)。
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