CN112043150B

CN112043150B - Electric rice cooker

Info

Publication number: CN112043150B
Application number: CN202010922589.6A
Authority: CN
Inventors: 陈智华; 颜天宝
Original assignee: Chuandong Magnetic Electronic Co Ltd
Current assignee: Chuandong Magnetic Electronic Co Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-08-13
Anticipated expiration: 2040-09-04
Also published as: CN112043150A

Abstract

The invention provides an electric cooker which comprises a cooker body, a cooker cover and an inner container, wherein a controller and a heating plate are installed at the lower part in the cooker body, an input device is installed on the outer side wall of the cooker body, the heating plate and the input device are respectively connected with the controller, a hollow accommodating cavity is formed in the cooker cover, a moisture detection device is installed in the accommodating cavity, and the moisture detection device is connected with the controller, so that the water content of rice in the inner container can be obtained in real time. The heating temperature parameter and the heating time parameter of the water control stage are calculated through a regression equation in a controller model relation, and corresponding control instructions of the heating temperature and the heating time are sent according to the heating temperature parameter and the heating time parameter, so that the water control is facilitated, the palatability of cooked rice is improved, and the problem that the electric rice cooker in the prior art cannot accurately control the water content of the rice according to the user requirements is solved.

Description

Electric rice cooker

Technical Field

The invention relates to the technical field of household appliances, in particular to an electric cooker.

Background

The main function of the rice cooker is to cook rice, and the taste of cooked rice is an important aspect of measuring the quality of the rice cooker. Since the taste of rice is a general concept and an unquantized comprehensive feeling after people eat rice, people usually adopt a method of measuring the hardness of rice and the like to judge the quality of the rice steamed by the electric rice cooker. When the conventional electric cooker is used for cooking, rice and water are placed in an inner container of the electric cooker together for cooking, but the cooked rice is not good due to too little water, even scorching occurs, and the palatability of the cooked rice is extremely poor due to too much water, so that the water content of the cooked rice is controlled timely and accurately in order to improve the performance of the cooked rice of the electric cooker, and the performance of the cooked rice of the electric cooker is improved.

Disclosure of Invention

Based on this, in order to solve the problem that the electric cooker in the prior art is difficult to control the water content of the cooked rice in real time, the invention provides an electric cooker, which has the following specific technical scheme:

the utility model provides an electric cooker, includes the pot body, pot cover and inner bag, controller, hot plate are installed to the lower part in the pot body, install input device on the external lateral wall of pot body, the hot plate with input device respectively with the controller is connected, the inside of pot cover is provided with the hollow chamber that holds, hold the intracavity and install moisture detection device, just moisture detection device with the controller is connected.

The electric cooker can obtain the water content of rice in the inner container in real time, the heating temperature parameter and the heating time parameter of the water control stage are obtained through calculation of a regression equation in a controller model relation, corresponding control instructions of the heating temperature and the heating time are sent according to the heating temperature parameter and the heating time parameter, and the electric cooker cooks the cooker body until the water content of the rice reaches the rice water content parameter of the water control stage input by a user through the input device, namely the rice water content required by the user is reached.

Further, the input device is used for generating a stage setting signal and a parameter setting signal according to the input of a user.

Further, the moisture detection device is used for collecting the infrared spectrum of the rice in the inner container in real time or at regular time and transmitting the infrared spectrum to the controller.

Further, the controller analyzes the infrared spectrum to obtain the water content parameter of the rice.

Further, the controller is used for determining parameters of each stage in the cooking process according to the stage setting signals and the parameter setting signals so as to determine cooking mode values and controlling the heating device to heat and cook the pot body according to the cooking mode values.

Further, the stages include a heating stage, a cooking stage, and a water control stage.

Further, the parameters include a heating time parameter, a heating temperature parameter, and a rice water content parameter.

Further, the controller is established with rice water content parameter, addInputting the parameters of the water content of the rice in the water control stage through the input device, and calculating by utilizing a regression equation in the model relationship to obtain the parameters of the heating temperature and the heating time in the water control stage; wherein the regression equation is:

in the formula, F₂The parameter of water content of the rice in the water control stage, F, is inputted by the input device₁And detecting infrared spectrum in real time by the moisture detection device and transmitting the infrared spectrum to the controller to obtain real-time rice water content parameters, wherein K is a correction coefficient, T is a heating time parameter, and T is a heating temperature parameter.

Further, the input device comprises a proximity switch for generating a start signal to trigger the rice cooker to start heating or for generating a close signal to trigger the rice cooker to enter an off state.

Furthermore, the proximity switch comprises a box body, a reed switch, a first pin and a second pin, wherein the reed switch, the first pin and the second pin are arranged in the box body, the first pin and the second pin are respectively arranged at two ends of the reed switch, and one end of each of the two wires is respectively connected with the first pin and the second pin; the box body comprises a metal box body and a plastic box body arranged in the metal box body, a plurality of positioning columns are arranged in the plastic box body, one ends of the positioning columns are connected with the inner wall of the plastic box body, the other ends of the positioning columns are far away from the inner wall of the plastic box body and extend out, and first gaps are formed among the positioning columns and used for fixing the first pins; and a second gap is reserved between the plastic box bodies of the positioning columns, the width of the second gap is the same as the diameter of the reed pipe, and the second gap is used for fixing the reed pipe to keep the reed pipe at the central position of the plastic box body.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

Fig. 1 is a schematic structural view of an electric rice cooker according to an embodiment of the present invention;

FIG. 2 is a schematic view of a control system of the rice cooker according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a proximity switch of an electric rice cooker according to an embodiment of the present invention;

FIG. 4 is a schematic sectional side view of a plastic case of a proximity switch of an electric rice cooker according to an embodiment of the present invention;

FIG. 5 is a schematic view of a positioning post of a proximity switch of an electric rice cooker according to an embodiment of the present invention;

fig. 6 is a sectional view of a proximity switch of an electric rice cooker according to an embodiment of the present invention.

Description of reference numerals:

1-a pot body; 2-pot cover; 3-inner container; 4-a moisture detection device; 5-a wire; 6-a filler; 7-a reed pipe; 8-a metal box body; 9-plastic box body; 91-positioning columns; 92-heat shrink tubing; 93-insulating protective sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.

As shown in fig. 1, an electric discharge cooker in an embodiment of the present invention includes a cooker body 1, a cooker cover 2 and an inner container 3, wherein a controller and a heating plate are installed at a lower portion inside the cooker body 1, an input device is installed on an outer side wall of the cooker body 1, the heating plate and the input device are respectively connected to the controller, a hollow accommodating cavity is provided inside the cooker cover 2, a moisture detection device 4 is installed inside the accommodating cavity, and the moisture detection device 4 is connected to the controller.

In one embodiment, the moisture detection device 4 is an infrared moisture detector.

The infrared moisture detector is an instrument for measuring the water content in a material by utilizing the strong absorption characteristic of water to infrared rays with specific wavelengths, when the material is irradiated by the infrared rays with the specific wavelengths, the water contained in the material absorbs part of the energy of the infrared rays, and the more the water is contained, the more the absorption is increased, so that the reduction of the transmitted light or the reflected light can be measured to calculate the water content. And obtaining the real-time water content of the rice in the water control stage through an infrared water content detector.

In one embodiment, the input device is used for generating a stage setting signal and a parameter setting signal according to user input.

In one embodiment, the input device includes a phase key, a parameter key and a setting key, the phase key is used for generating a phase setting signal to select a phase to be set, the parameter key is used for generating a parameter setting signal to select a parameter to be set in the phase to be set, and the setting key is used for generating a setting signal to set a value of the parameter to be set.

In one embodiment, the moisture detection device is used for collecting the infrared spectrum of the rice in the inner container in real time or at regular time and transmitting the infrared spectrum to the controller.

In one embodiment, the controller analyzes the infrared spectrum to obtain the water content parameter of the rice.

In one embodiment, the controller is used for determining parameters of each stage in the cooking process according to the stage setting signals and the parameter setting signals so as to determine cooking mode values and controlling the heating device to heat and cook the pot body according to the cooking mode values.

In one embodiment, the stages include a heating stage, a cooking stage and a water control stage.

In one embodiment, the parameters include a heating time parameter, a heating temperature parameter, and a rice water content parameter.

In one embodiment, the controller is provided with a model relation of a rice water content parameter, a heating temperature parameter and a heating time parameter, the rice water content parameter of the water control stage is input through the input device, and the heating temperature parameter and the heating time parameter of the water control stage are calculated by using a regression equation in the model relation; wherein the regression equation is:

in the formula, F₂The parameter of water content of the rice in the water control stage, F, is inputted by the input device₁And detecting infrared spectrum in real time by the moisture detector and transmitting the infrared spectrum to the controller to obtain real-time rice water content parameters, wherein K is a correction coefficient, T is a heating time parameter, and T is a heating temperature parameter.

In one embodiment, the K value is 1.257; the heating time is continuous, and t is less than or equal to 15 min; the T is less than or equal to 100 ℃.

In one embodiment, the correction coefficient is obtained by adopting a multivariate scattering correction method, so that the detection accuracy can be effectively improved.

In one embodiment, the infrared moisture detector has a scanning range of 20cm to 45 cm.

The inventor researches and discovers that the more efficient cooking performance can be obtained by only controlling the subsequent water control stage in the process of cooking rice by the electric cooker, the heating time is controlled within 15min, the heating temperature is controlled to be less than 100 ℃, under the conditions that the heating time is greater than 15min and the heating temperature is greater than 100 ℃, the bottom layer of rice loses water, but the water content of the upper layer of rice is higher, and the uniform water control effect cannot be achieved.

In one embodiment, the regression equation in the model relationship is obtained by a moisture index method. The method specifically comprises the following steps: and (3) collecting data in the water control stage such as the data in the table 1 to carry out relevant data analysis, importing the data shown in the table 1 into OPUS 6.5 data processing software, and establishing a regression equation for obtaining the water content parameter, the heating temperature parameter and the heating time parameter of the rice in the water control stage by using a partial least squares regression analysis principle and a cross test method.

Table 1:

F₂/％	F₁/％	T/℃	t/min
				50	70.112	80	5
60	68.171	65	10
				70	74.714	45	12
55	65.999	70	8

as shown in fig. 2, in one embodiment, the electric discharge cooker is provided with a control system of the electric cooker, the control system of the electric cooker including:

the acquisition module is used for acquiring real-time rice water content parameters of rice steamed by the electric cooker and sending the real-time rice water content parameters to the comparison module;

namely, the real-time water content parameter of the rice is obtained in real time through the water content detector.

The comparison module is used for receiving the real-time rice water content parameter, comparing the acquired real-time rice water content parameter with the rice water content parameter input in the input device, and if the acquired real-time rice water content parameter is larger than the rice water content parameter input in the input device, sending the parameter to the data processing module;

the data processing module is used for inputting the rice water content parameter input by the device according to the real-time rice water content parameter and comprises the following steps of:

calculating to obtain the ratio of heating temperature parameter to heating time parameterGenerating a control instruction and sending the control instruction to an adjusting module;

and the adjusting module is used for receiving the control instruction and adjusting the heating temperature parameter and the heating time parameter of the rice cooked by the electric cooker according to the control instruction.

In one embodiment, the adjusting module comprises:

the first adjusting unit is used for adjusting the heating temperature parameter of the water control stage;

and the second adjusting unit is used for adjusting the heating time parameter of the water control stage.

In one embodiment, the range of the parameter of the water content of the rice inputted by the input device is F₂＝50％-70％。

In one embodiment, the input device comprises a proximity switch for generating a start signal to trigger the rice cooker to start heating or for generating a close signal to trigger the rice cooker to enter an off state. Specifically, when the controller receives F₂＝F₁When the electric cooker is turned off, a control command of turning off is sent out to trigger the electric cooker to enter a turning-off state; when F is present₂＞F₁And when the electric cooker is heated, a starting control command is sent to trigger the electric cooker to continue heating.

As shown in fig. 3 to 4, in one embodiment, the proximity switch includes a box, a reed switch 7 disposed in the box, a first pin, a second pin, and two wires 5, where the first pin and the second pin are disposed at two ends of the reed switch 7, respectively, and one end of each of the two wires 5 is connected to the first pin and the second pin, respectively.

In one embodiment, the box body comprises a metal box body 8 and a plastic box body 9 arranged in the metal box body 8, a plurality of positioning columns 91 are arranged in the plastic box body 9, one ends of the positioning columns 91 are connected with the inner wall of the plastic box body 9, the other ends of the positioning columns 91 are far away from the inner wall of the plastic box body 9 and extend out, and first gaps are formed among the positioning columns 91 and used for fixing the first pins; and a second gap is reserved between the plastic box bodies by the positioning columns 91, the width of the second gap is the same as the diameter of the reed pipe 7, and the second gap is used for fixing the reed pipe 7 and keeping the reed pipe at the central position of the plastic box body 9. The metal box 8 is used for strengthening the protection of the internal reed pipe 7, and the plastic box 9 has a certain insulation effect.

In one embodiment, the first pin is shaped like a "U" and inserted into the first gap, and the second pin is shaped like a "i" and inserted into the second gap.

In one embodiment, the box body is in a shape of a single-end closed round tube.

In one embodiment, the lead 5 extends from inside the case to outside the case.

In one embodiment, the metal case 8 is a stainless steel metal case.

As shown in fig. 5, under the action of the magnet, when the magnet approaches the switch from below, the position L1 is turned on, and then the magnet approaches the switch from above, and the magnet should also be turned on when reaching the same position L2, but when the reed pipe 7 is not located at the central position of the box body, the distance between L1 and L2 is not equal, that is, the distance between D2 shown in fig. 2 is much greater than the distance between D1, so that it is easy for the switch that is close to turn on, the switch that is far from turn off, or the magnet needs to be closer to turn on the switch that is far from, therefore, a plurality of positioning posts 91 are arranged in the plastic box body 9 to fix the reed pipe 7 at the central position in the plastic box body 9, and it is ensured that the outer magnet can keep a certain distance from the reed pipe 7 no matter at that angle, so that the on and off of the product has higher stability. And the proximity switch has higher and more sensitive performance when the controller sends out a control command.

In one embodiment, the cartridge is filled with a filling 6.

In one embodiment, the filler 6 is epoxy resin.

In one embodiment, the plastic tray 9 can be replaced with heat shrink tubing 92.

In one embodiment, the heat shrinkable tube 92 has a diameter smaller than that of the metal case 8, and an insulating sheath 93 is disposed on an end of the heat shrinkable tube 92 away from the lead 5.

In one embodiment, the diameter of the insulating protective sleeve 93 is equal to the diameter of the metal box 8, and a protrusion is disposed around the insulating protective sleeve 93, and the protrusion is connected to the inner wall of the metal box 8.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electric cooker comprises a cooker body, a cooker cover and an inner container, wherein a controller and a heating plate are installed at the lower part in the cooker body, an input device is installed on the outer side wall of the cooker body, and the heating plate and the input device are respectively connected with the controller;

the input device is used for generating a stage setting signal and a parameter setting signal according to user input;

the moisture detection device is used for acquiring the infrared spectrum of the rice in the inner container in real time or at regular time and transmitting the infrared spectrum to the controller;

the controller analyzes the infrared spectrum to obtain a water content parameter;

the controller is used for determining parameters of each stage in the cooking process according to the stage setting signals and the parameter setting signals so as to determine cooking mode values and controlling the heating device to heat and cook the pot body according to the cooking mode values;

each stage comprises a heating stage, a cooking stage and a water control stage;

the parameters comprise a heating time parameter, a heating temperature parameter and a rice water content parameter;

the controller is provided with a model relation of a rice water content parameter, a heating temperature parameter and a heating time parameter, the rice water content parameter of the water control stage is input through the input device, and the heating temperature parameter and the heating time parameter of the water control stage are calculated by utilizing a regression equation in the model relation; wherein the regression equation is:

2. The rice cooker of claim 1, wherein the input device comprises a proximity switch for generating a start signal to trigger the rice cooker to start heating or for generating a close signal to trigger the rice cooker to enter an off state.

3. The electric cooker according to claim 2, wherein the proximity switch comprises a box body, a reed switch arranged in the box body, a first pin and a second pin, wherein the first pin and the second pin are respectively arranged at two ends of the reed switch, and one ends of the two wires are respectively connected with the first pin and the second pin; the box body comprises a metal box body and a plastic box body arranged in the metal box body, a plurality of positioning columns are arranged in the plastic box body, one ends of the positioning columns are connected with the inner wall of the plastic box body, the other ends of the positioning columns are far away from the inner wall of the plastic box body and extend out, and first gaps are formed among the positioning columns and used for fixing the first pins; and a second gap is reserved between the plastic box bodies of the positioning columns, the width of the second gap is the same as the diameter of the reed pipe, and the second gap is used for fixing the reed pipe to keep the reed pipe at the central position of the plastic box body.