CN106989417B

CN106989417B - Intelligent pot and stove device for decocting medicinal herbs

Info

Publication number: CN106989417B
Application number: CN201710145279.6A
Authority: CN
Inventors: 李明守; 吴长兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-10
Filing date: 2017-03-10
Publication date: 2021-09-21
Anticipated expiration: 2037-03-10
Also published as: CN106989417A

Abstract

The invention belongs to the field of medical equipment, and particularly discloses an intelligent pot and stove device for decocting medicinal herbs. The bottom of the medicine decocting pot is provided with a thermocouple, and an air inlet pipeline of a burner of the gas stove is provided with an electric control gas valve for adjusting firepower. The controller acquires a decoction form and sequentially carries out medicine soaking, temperature rising and decoction operations based on the decoction form. The controller processes the measured value of the kettle temperature detected by the thermocouple and the set value of the temperature obtained from the decoction program, generates a control signal to operate the electric control gas valve, changes the firepower of the gas stove, enables the measured value of the kettle temperature to reach the set value of the temperature, and completes the decoction of the Chinese herbal medicines until the decoction program is executed. In the whole decocting process, the controller regulates and controls the firepower of the gas stove, heats the decocting pot, and decocts the Chinese herbal medicine without participation of a user, and the user can decoct the decoction with high drug effect without the decocting skill.

Description

Intelligent pot and stove device for decocting medicinal herbs

Technical Field

The invention relates to a medicine decocting device, in particular to an intelligent pot and stove device capable of automatically decocting Chinese herbal medicines and composed of a medicine decocting pot and a gas stove, and belongs to the field of medical equipment.

Background

The traditional Chinese medicine has small side effect, is not easy to form drug resistance, and can treat both symptoms and root causes. With the development of society and the improvement of health consciousness of people, more and more patients favor the traditional Chinese medicine to treat diseases. The efficacy of the traditional Chinese medicine liquid depends on whether the decocting method is suitable or not, namely how to master the duration and control the time; different Chinese herbal medicine prescriptions often need decocting methods matched with the Chinese herbal medicine prescriptions, even traditional Chinese medicine personnel often need experience accumulation for many years to decoct liquid medicine with high drug effect. Patients usually decoct by themselves after taking back the Chinese herbal medicines, for example, on a gas stove and an induction cooker, the patients need to continuously adjust firepower, mainly to prevent overflow and decoction, and to consume a great deal of energy and time; and because the control of firepower and decoction time is not known, the efficacy of the decoction is improved, so that the efficacy of the decocted decoction is not high. Therefore, there is a need to develop a decocting device, which can obtain a decocting form suitable for the prescription of Chinese herbs, and automatically infuse, heat, decoct and cool the Chinese herbs according to the decocting form, so that the Chinese herbs can be decocted intelligently without participation of patients.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a decocting device which is used for sequentially soaking, heating, decocting and cooling Chinese herbal medicines based on a decocting program, and automatically decocting the Chinese herbal medicines without participation of patients.

The invention discloses an intelligent pot stove device for decocting medicinal herbs, which mainly comprises a medicinal herb decocting pot and a gas stove, and is characterized in that:

the medicine decocting pot comprises a pot body and a pot cover, the pot body comprises a pot bottom and a pot body, the pot bottom is provided with a temperature measuring hole, the top of the pot body is provided with a pot opening, and the pot cover and the pot opening are covered;

the kettle also comprises a thermocouple for detecting the temperature at the bottom of the kettle, and the thermocouple is assembled with the temperature measuring hole;

the gas stove comprises a combustor and an electric control gas valve, wherein the electric control gas valve is arranged in an air inlet pipeline of the combustor and used for adjusting the fire power of the combustor;

the device further comprises a controller for decoction control, wherein the controller acquires a decoction program corresponding to the decoction requirement of the decocted Chinese herbal medicine, and the decoction program is configured with a set value of temperature related to time; in each control period, the controller acquires a temperature set value from the decocting program by adopting an interpolation method, processes the temperature set value and the measured value of the kettle temperature detected by the thermocouple, generates a control signal to operate the electric control gas valve, and adjusts the fire power of the burner so as to enable the measured value of the kettle temperature to reach the temperature set value until the decocting program is executed, thereby finishing the decocting of the Chinese herbal medicines.

The invention discloses an intelligent pot stove device for decocting medicinal herbs, which comprises a decocting pot and a gas stove, and is configured with a thermocouple and a controller, wherein the thermocouple is assembled at the bottom of the decocting pot. The controller acquires a decoction form corresponding to the decoction requirement of the traditional Chinese medicine prescription; the controller carries out operations of medicine soaking, temperature rising, decoction and temperature lowering in sequence based on the decoction program. The controller performs operation processing based on a set value of the temperature in the decoction program and a measured value of the kettle temperature to generate a control signal to operate the electric control gas valve, adjusts the firepower of the gas stove, enables the measured value of the kettle temperature to reach the set value, and completes decoction until the decoction program is executed, so that a patient does not need to participate in the decoction.

In the specific implementation process, the pot and stove device also has the following further preferable technical scheme.

Preferably, the decoction regimen comprises a schedule;

the program table is configured with set values of temperature associated with time, and comprises a plurality of program steps, which form a medicine soaking stage, a temperature rising stage and a decoction stage which are necessary in the decoction process of the Chinese herbal medicines; the program step mainly comprises a time set value and a temperature set value.

Preferably, the decoction regimen further comprises regimen parameters including temperature offset values for correcting temperature control deviations of the kettle temperature;

during each control cycle, the measured value of the kettle temperature is brought to the sum of the set value of the temperature obtained from the cooking profile and the temperature deviation value.

Preferably, the temperature measuring hole extends inwards from the edge of the bottom of the kettle along the radial direction and terminates at the middle part of the bottom of the kettle, and the measuring end of the thermocouple is jointed with the blind end part of the temperature measuring hole to detect the temperature of the middle part of the bottom of the kettle.

Preferably, the thermocouple is provided with a measuring end, a blind end part and a measuring end, wherein the blind end part is provided with a temperature measuring hole, the blind end part is provided with a measuring end, and the measuring end is provided with a measuring end hole.

Preferably, the electric control gas valve comprises a plug valve and a motor, and the motor is connected with a valve rod shaft of the plug valve; alternatively, the first and second electrodes may be,

the electric control gas valve is composed of electric control flow valves, the electric control flow valves at least comprise a 1 st electric control flow valve and a 2 nd electric control flow valve, the 1 st electric control flow valve is arranged in an air inlet pipeline of the inner ring fire of the combustor, and the 2 nd electric control flow valve is arranged in an air inlet pipeline of the outer ring fire of the combustor and is used for respectively controlling the firepower of the inner ring fire and the outer ring fire of the combustor; further, the electric control flow valve is one of a proportional valve, a servo valve, a proportional servo valve and a mass flow controller.

Preferably, at least one of an ignition needle, a flame detection needle and an overflow sensor is further included; the ignition needle is used for igniting the combustor, the flame detection needle is used for detecting whether flame exists on the combustor, and the overflow sensor is used for detecting the overflow state of the medicine decocting pot.

Preferably, the controller collects a detection signal of the overflow sensor, and generates a control signal to operate the electrically controlled gas valve when the overflow state is determined to occur based on the detection signal of the overflow sensor, so as to reduce the fire power of the burner until the overflow state is eliminated; alternatively, the first and second electrodes may be,

the controller reduces a set value of a temperature offset value in the decocting program or/and reduces a set value of a temperature of a program step corresponding to occurrence of an overflow in the decocting program, so that the fire power of the burner is reduced until the overflow state is eliminated.

Preferably, the top of the kettle body part is provided with a flanging part which extends along the circumferential direction and surrounds the circumference, and the flanging part is positioned outside the kettle opening and used for collecting liquid overflowing in the decocting process.

Preferably, the overflow sensor is a thermocouple fixed with the flanging part, and the detection end of the thermocouple is positioned on the inner side of the flanging part and opposite to the overflow holes which are positioned on the kettle cover and arranged along the radial direction; alternatively, the first and second electrodes may be,

the overflow sensor is an ultrasonic sensor or a photoelectric sensor for detecting foam, is arranged above the medicine decocting pot, and the detection end part of the overflow sensor is opposite to a window arranged on the pot cover.

The intelligent pot stove device for decocting the medicines comprises a medicine decocting pot and a gas stove, and is configured with a thermocouple, a controller and a decocting program arranged in the controller. The medicine decocting pot comprises a pot body and a pot cover, wherein the pot body comprises a pot bottom and a pot body, the pot bottom is provided with a temperature measuring hole, the top of the pot body is provided with a pot opening, and the pot cover and the pot opening are mutually covered. The thermocouple is assembled in the temperature measuring hole and used for measuring the temperature of the bottom of the medicine decocting pot. The gas stove comprises a combustor and an electric control gas valve, wherein the electric control gas valve is arranged in an air inlet pipeline of the combustor and used for adjusting the fire power of the combustor. The medicine decocting pot is placed on a gas stove, and the gas stove heats the medicine decocting pot. The controller is embedded on the kettle body of the gas stove and used for controlling decoction. When the Chinese herbal medicines are decocted, the controller acquires a decoction form which meets the decoction requirement of the prescription of the decocted Chinese herbal medicines, and the medicine soaking, heating, decocting and cooling are sequentially controlled according to the decoction form. Based on the decoction program, in each control/sampling period, the controller collects the measured value of the kettle temperature detected by the thermocouple and obtains a set value of the temperature from the decoction program, carries out operation processing based on the measured value of the kettle temperature and the set value of the temperature to generate a control signal, operates the electric control gas valve, and adjusts the fire power of the burner so as to enable the measured value of the kettle temperature to reach the set value of the temperature until the decoction program is executed, thereby finishing the decoction of the Chinese herbal medicines. In the decocting process of the Chinese herbal medicines, the controller operates the electric control gas valve based on the decocting program to control the gas stove to generate required firepower, does not need participation of users, and can be used for decocting Chinese herbal medicine decoction with high drug effect if the users have decocting knowledge and skill. In addition, the measuring end part of the thermocouple is arranged at the center of the bottom of the kettle, and the temperature at the center of the bottom of the kettle is detected, so that the real temperature of the medicine decocting kettle which needs to be controlled can be reflected, and the accuracy of temperature detection is improved.

Advantageous effects

The Chinese herbal medicines are decocted automatically, the medicine effect of the liquid medicine is high, and users do not need to participate in the medicine. The intelligent pot and stove device for decocting the medicines comprises a medicine decocting pot and a gas stove, and is configured with a thermocouple, a controller and a decocting program arranged in the controller. The medicine decocting pot is placed on the gas stove, and the thermocouple is assembled in a temperature measuring hole at the bottom of the pot of the medicine decocting pot. When the Chinese herbal medicines are decocted, the controller acquires a decoction form corresponding to the decoction requirement of the prescription of the decocted Chinese herbal medicines, and the operations of medicine soaking, temperature rising, decoction and temperature lowering are sequentially carried out according to the decoction form. In each control period, the controller collects a measured value of the kettle temperature detected by the thermocouple and obtains a set value of the temperature from the decocting program, the calculation processing is carried out based on the measured value and the set value of the kettle temperature, a control signal is generated to control the electric control gas valve, the firepower of the gas stove is adjusted, the measured value of the kettle temperature detected by the thermocouple reaches the set value, the decocting of the Chinese herbal medicine is completed until the decocting program is executed, in the whole decocting process, the controller adjusts the firepower and the firepower duration time based on the decocting program, the participation of a user is not needed, and the user can boil the Chinese herbal medicine decoction with high drug effect without decocting knowledge and skill.

Drawings

Fig. 1 is a schematic structural view of a pot and stove device.

Fig. 2 is a schematic structural view of a medicine decocting pot.

Fig. 3 is an exploded view of the drug decocting pot.

Fig. 4 is a schematic view of an application state of the medicine decocting pot.

Fig. 5 is a schematic view of another application state of the medicine decocting pot.

Fig. 6 is a schematic structural view of a gas range.

Fig. 7 is a schematic structural view of the burner.

Fig. 8 is a schematic sectional view of the gas range of fig. 6 in the direction of a-a.

Fig. 9 is a schematic view showing the structure of another embodiment of the gas range.

Fig. 10 is a schematic view of another gas range.

FIG. 11 is a functional block diagram of a controller.

The pot comprises a 100-decoction pot, a 110-pot body, a 111-pot bottom, a 112-pot body, a 113-pot opening, a 114-flanging part, a 115-temperature measuring hole, a 116-fixing hole, a 117-plug, a 118-elastic part, a 120-pot nozzle, a 130-pot cover, a 131-cover body part, a 132-handle part, a 133-flange part, a 134-overflow hole, a 135-window, a 140-handle, a 141-cavity, a 150-thermocouple, a 160-overflow sensor and a 170-connecting terminal;

200-a gas stove, 210-a combustor, 211-a furnace end, 2111-an inner ring base, 2112-an outer ring base, 2113-an ejector, 2113 a-an inner ring ejector, 2113 b-an outer ring ejector, 2114-a detection hole, 2114 a-a 1 st detection hole, 2114 b-a 2 nd detection hole, 212-an inner ring fire cover, 213-an outer ring fire cover, 214-a nozzle, 214 a-an inner ring nozzle, 214 b-an outer ring nozzle, 215-a pot support, 220/220 '-an electronic control gas valve, 221/221' -an electromagnetic valve, 222-a plug valve, 222a '-a 1 st electronic control flow valve, 222 b' -a 2 nd electronic control flow valve, 223-a motor, 224-a speed reducing mechanism, 230-an ignition needle, 240-a flame detection needle, 250-a proximity sensor, 260-gas stove shell, 261-stove bottom shell and 262-stove top shell;

300-controller, 310-power supply.

Detailed Description

In order to clarify the technical solution and technical object of the present invention, the present invention will be further described with reference to the accompanying drawings and the detailed description. The directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

As shown in fig. 1 and 6, the intelligent pot and stove device for decocting medicinal herbs of the present embodiment includes a decocting pot 100, a gas stove 200, and a controller 300. The medicine decocting pot 100 includes a pot body 110, a pot lid 130, a thermocouple 150, and an overflow sensor 160. The kettle body 110 comprises a kettle bottom 111 and a kettle body 112, wherein the kettle bottom 111 is provided with a temperature measuring hole 115 arranged along the radial direction. The top of the pot body part 112 is provided with a pot opening 113, and the pot cover 130 is covered with the pot opening 113. The thermocouple 150 is assembled with the temperature measuring hole 115 for measuring the temperature of the kettle bottom 111 of the kettle 100. The gas range 200 includes a burner 210 and an electrically controlled gas valve 220, and the electrically controlled gas valve 220 is disposed in an intake pipe of the burner 210 for adjusting the amount of fire of the burner 210. The medicine decocting pot 100 is placed on the gas range 200, and the gas range 200 heats the medicine decocting pot 100 to decoct the Chinese herbal medicines. The controller 300 is embedded in the body of the gas range 200 for controlling the decoction, including infusion and decoction. When decocting the Chinese herbal medicine, the controller 300 acquires a decoction form according with the decoction requirement of the prescription of the decocted Chinese herbal medicine, and sequentially performs medicine soaking, temperature rising, decoction and temperature lowering according to the decoction form. Based on the decoction program, in each control period, the controller 300 collects detection signals of the thermocouple, obtains a measured value of the kettle temperature, obtains a set value of the temperature from the decoction program by using a linear interpolation method, performs operation processing based on the measured value of the kettle temperature and the set value of the temperature, generates control signals to operate the electric control gas valve, changes the opening degree of the electric control gas valve, adjusts the fire power of the burner so as to enable the measured value of the kettle temperature to reach the set value of the temperature, and finishes the decoction of the Chinese herbal medicines until the decoction program is executed. In the decocting process of the Chinese herbal medicines, the controller operates the electric control gas valve based on the decocting program, adjusts the fire power of the gas stove, does not need participation of users, and can decoct the Chinese herbal medicine decoction with high drug effect by the users with or without the decocting knowledge and skill.

Medicine decocting pot 100

The medicine decocting pot 100, as shown in fig. 2-3, includes a pot body 110, a spout 120, a pot lid 130, a handle 140, a thermocouple 150, an overflow sensor 160, and a terminal 170.

As shown in fig. 3, the kettle body 110 includes a circular kettle bottom 111 and a kettle body 112, and the kettle bottom 111 and the kettle body 112 are fixed to form a container with an open upper end for containing liquid. The kettle bottom 111 and the kettle body 112 are integrally formed. The top of the pot body part 112 is provided with a boss extending inwards from the inner surface, and the step surrounds a circle to form a pot opening 113 along the horizontal plane direction. The top of kettle body portion 112 sets up the turn-ups portion 114 that upwards extends and lean out, and turn-ups portion 114 encircles a week along the top of kettle body portion, and this turn-ups portion 114 is located the outside side of hu kou 113 for collect the liquid that the decocting process spills over from hu kou 113, avoid overflowing liquid unrestrained, in order to influence the drug effect not enough. The burring portion 114 is provided with a fixing hole for fixing the overflow sensor, as shown in fig. 4. The spout 120 is a housing having a channel for fluid communication therein, the diameter of the channel gradually decreasing from the inlet end to the outlet end of the spout. The inlet end of the spout 120 is fixed to the body 112 and is located at the upper middle part of the body 112, and the spout 120 is communicated with the body 112 to facilitate pouring of the liquid medicine. The handle 140 has an ear shape, and a cavity 141 for mounting the terminal 170 is formed in the handle 140. The handle 140 is secured to the body 112 on the opposite side of the spout 120. The interior of the jug bottom 111 is provided with a temperature measuring hole 115 for accommodating a thermocouple 150. The temperature measuring holes 115 are arranged along the radial direction, the temperature measuring holes 115 extend inwards from the edge of the bottom of the kettle along the radial direction and end at the middle part of the bottom of the kettle, and the blind end part of the temperature measuring holes 115 is positioned at the center of the bottom of the kettle. The free end part of the temperature measuring hole 115 is provided with a fixing hole 116 for assembling a plug, and the fixing hole 116 and the temperature measuring hole 115 are coaxial and are positioned at the edge part of the kettle bottom 111.

The pot lid 130, as shown in fig. 3, includes a lid portion 131 and a handle portion 132, which are disc-shaped and have an upper arch shape, and the top of the handle portion 132 and the top of the lid portion 131 are fixed to each other. The edge of the bottom surface of the cover 131 is provided with a flange 133, and the flange 133 surrounds the periphery. The outer diameter of the flange 133 matches the inner diameter of the spout 113. The cover portion 131 is provided at an edge thereof with an overflow hole 134, and the overflow hole 134 is arranged in a radial direction. The overflow hole 134 is located above the flange 133. The overflow hole 134 is used for liquid overflow and backflow in the pot body, and for the overflow sensor 160 to more accurately detect the overflow state of the decocting pot.

The kettle body 110, the spout 120, the kettle cover 130 and the handle 140 are made of ceramics or porcelain. Because the traditional Chinese medicine decoction does not have chemical reaction with ceramics and porcelain, no harmful substances are generated in the traditional Chinese medicine decoction, and the high drug effect of the liquid medicine is kept. It should be noted that, metal material such as stainless steel can also be used, but the inner part of the inner container is required to be made of porcelain layer to isolate the traditional Chinese medicine liquid and metal, so as to avoid chemical reaction between the liquid and metal, reduce drug effect and generate harmful substance.

The temperature measuring point of the thermocouple 150 is sealed at one end to form a measuring end. The thermocouple 150 is inserted into the temperature measuring hole 115, and the measuring end of the thermocouple 150 is attached to the blind end of the temperature measuring hole 115 and used for detecting the temperature of the middle of the bottom of the kettle. The spring and the plug 117 which form the elastic part 118 are sequentially assembled in the fixing hole 116, the plug 117 is fixed with the fixing hole 116, the thermocouple 150, the elastic part 118 and the plug 117 are sequentially attached, and the spring 118 is in a compressed state, so that the measuring end of the thermocouple 150 is tightly attached to the blind end part of the temperature measuring hole 115, and the bottom temperature of the kettle can be detected more accurately.

Wherein, the overflow sensor 160 is a thermocouple. The thermocouple is assembled and fixed with the fixing hole of the flange part 114, and the sensing end of the thermocouple is positioned at the inner side of the flange part 114 and is just opposite to the overflow hole 134 of the pot lid 130. It can be understood that when the kettle cover 130 is covered, the overflow hole 134 of the kettle cover 130 and the detection end of the thermocouple for overflow detection need to be opposite, so that the overflow state of the medicine decocting kettle can be detected more timely. With this arrangement, when the kettle 100 overflows, the liquid in the kettle 100 first flows out of the overflow hole 134, and the detection end of the thermocouple can timely contact the overflowing liquid. After the detection end part of the thermocouple contacts with the liquid, the temperature of the detection end part of the thermocouple changes suddenly, and a sudden change step is formed on a temperature curve detected by the thermocouple, so that the detection result can be used for judging that the medicine decocting pot 100 is in an overflow state. Therefore, the overflow state of the decocting pot can be detected by the thermocouple, but the overflow state can be detected only after the liquid in the decocting pot overflows.

The thermocouple 150 and the overflow sensor 160 are electrically connected to a connection terminal 170 mounted in the handle 140 through wires, respectively, and the connection terminal 170 is electrically connected to the controller 300 through a signal wire, so that the thermocouple 150 and the overflow sensor 160 are electrically connected to the controller, respectively.

It should be noted that the temperature measuring hole 115 may also be a hole with a rectangular end surface. The thermocouple 150 is packaged into a sheet shape, and the end face of the thermocouple 150 is matched with the end face of the temperature measuring hole 115 in shape. The measuring portion of the thermocouple 150 is provided on the upper surface of the thermocouple. The thermocouple 150 is inserted into the temperature measuring hole 115, and the elastic member 118, such as a spring plate, is arranged between the lower surface of the thermocouple 150 and the lower inner wall surface of the temperature measuring hole 115 and is in a compressed state, so that the measuring part of the thermocouple 150 is tightly attached to the upper inner wall surface of the temperature measuring hole 115. In addition, the measuring part of the thermocouple 150 can be arranged on the lower surface of the thermocouple, the thermocouple 150 is arranged in the temperature measuring hole 115, and an elastic sheet is arranged between the upper surface of the thermocouple 150 and the upper inner wall surface of the temperature measuring hole 115; in addition, the measuring part of the thermocouple 150 can be arranged on the side surface of the thermocouple, the thermocouple 150 is assembled with the temperature measuring hole 115, and an elastic sheet is arranged between the opposite side surface of the measuring part of the thermocouple 150 and the side wall of the temperature measuring hole 115, so that the measuring part of the thermocouple 150 is tightly attached to the temperature measuring hole 115, and the accuracy of temperature detection is improved.

Gas kitchen ranges 200

The gas range 200, as shown in fig. 6 and 7, includes a burner 210, an electrically controlled gas valve assembly 220, an ignition needle 230, a flame detection needle 240, a proximity sensor 250, a gas range housing 260, and a pot holder 215. The electric control gas valve assembly 220 comprises a plug valve 222 and a motor 223, wherein an output shaft of the motor 223 is connected with a valve rod shaft of the plug valve 222, and the electric control gas valve assembly is used for changing the valve opening of the plug valve 222 and adjusting the fire power of the burner 210. The air inlet of the burner 210 is communicated with the air outlet of the electric control gas valve assembly 220, and the air inlet of the electric control gas valve assembly 220 is communicated with the air delivery pipe in the gas stove. An ignition needle 230 and a flame detection needle 240 are fixed to the burner 210 for igniting the burner 210 and detecting the presence or absence of a flame on the burner 210. The burner 210 is provided at the center thereof with a sensing hole 2114, and the proximity sensor 250 is assembled with the sensing hole 2114 for sensing the presence or absence of the decocting pot 100 on the gas range 200.

As shown in fig. 6 and 7, the burner 210 includes a burner 211, an inner ring fire cover 212, an outer ring fire cover 213, and a nozzle 214. The furnace end 211 comprises an inner ring base 2111, an outer ring base 2112 and an ejector 2113. The lower end of the outer ring base 2112 is provided with three fixing lugs for fixing with the gas stove bottom shell. The eductor 2113 includes an inner ring eductor 2113a and an outer ring eductor 2113 b. The nozzles 214 include an inner ring nozzle 214a and an outer ring nozzle 214 b. The outer ring base 2112 is an annular body having an annular gas passage for gas flow therein, the upper end of which is open. The inner ring base 2111 is a cylinder with a through hole along the axial direction in the middle, and the through hole is used for detecting whether a medicine decocting pot exists on the gas stove by the proximity sensor 250 and is called a 1 st detection hole 2114a, as shown in fig. 9. An annular air passage for gas circulation is provided in the inner ring base 2111, and has an open upper end. The inner ring base 2111 is arranged inside the outer ring base 2112, the inner ring base 2111 and the outer ring base 2112 are coaxial, the inner ring base 2111 and the outer ring base 2112 are fixed, and a vent hole for air circulation is arranged between the inner ring base 2111 and the outer ring base 2112. Two mounting holes for mounting the ignition needle 230 and the flame detection needle 240 in the vertical direction are provided between the inner ring base 2111 and the outer ring base 2112. The inner ring ejector 2113a comprises a contraction pipe portion, a mixing pipe portion and a diffusion pipe portion which are fixedly connected in sequence, the diffusion pipe portion of the inner ring ejector 2113a is fixed to the inner ring base 2111 and communicated with the annular air passage of the inner ring base 2111, the contraction pipe portion of the inner ring ejector 2113a is fixed to the inner ring nozzle 214a, and the inner ring nozzle 214a, the inner ring ejector 2113a and the inner ring base 2111 are communicated with each other and used for conveying fuel gas to the annular air passage in the inner ring base 2111. The outer ring ejector 2113b comprises a contraction pipe part, a mixing pipe part and a pressure expansion pipe part which are fixedly connected in sequence, the pressure expansion pipe part of the outer ring ejector 2113b is fixed with the outer ring base 2112 and communicated with the annular air passage of the outer ring base 2112, the contraction pipe part of the outer ring ejector 2113b is fixed with the outer ring nozzle 214b, and the outer ring nozzle 214b, the outer ring ejector 2113b and the outer ring base 2112 are communicated in sequence and used for conveying fuel gas to the annular air passage in the outer ring base 2112. The middle part of the inner ring fire cover 212 is provided with a through hole along the vertical direction, which is marked as a 2 nd detection hole 2114b, as shown in fig. 9, an annular air passage with an opening on the lower end surface is arranged in the inner ring fire cover 212, a plurality of fire holes are arranged on the inner ring fire cover 212, the fire holes are communicated with the annular air passage, and the inner ring fire cover can be understood as an annular body. The inner ring fire cover 212 mates with the inner ring base 2111. The inner ring fire cover 212 is covered on the inner ring base 2111, the lower end surface of the inner ring fire cover 212 is attached to the upper end surface of the inner ring base 2111, and after the inner ring fire cover 212 and the inner ring base 2111 are assembled, an annular air chamber formed by annular air passages is formed inside the inner ring fire cover 212 and used for uniformly distributing the natural gas to each fire hole of the inner ring fire cover 212. The 2 nd detection hole 2114b and the 1 st detection hole 2114a are coaxial and form a through hole in the vertical direction, called a detection hole 2114, for the proximity sensor 250 to detect the presence or absence of cookware on the burner. The outer ring fire cover 213 is an annular body, an annular air passage with an opening at the lower end surface is arranged in the outer ring fire cover 213, and a plurality of fire holes are arranged on the outer ring fire cover 213 and communicated with the annular air passage. The outer ring fire cover 213 mates with the outer ring base 2112. The outer ring fire cover 213 is covered on the outer ring base 2112, the lower end surface of the outer ring fire cover 213 is attached to the upper end surface of the outer ring base 2112, and after the outer ring fire cover 213 and the outer ring base 2112 are assembled, an annular air chamber formed by an annular air passage is formed inside the outer ring fire cover 213 and used for uniformly distributing the natural gas to each fire hole of the outer ring fire cover 213.

The flame detection needle 240 is a thermocouple flame detection needle, and has a reliable structure and a low failure rate. In addition, the flame detection needle 240 may be replaced by an ion flame detection needle.

The proximity sensor 250 is a mechanical proximity switch, and preferably a low-cost touch type mechanical proximity switch. The proximity switch is assembled by the proximity cradle and the burner 2101. The approaching bracket, as shown in fig. 8, includes a telescopic portion, a spring, and a fixing seat. A columnar blind hole with an opening at the upper end is arranged in the fixed seat along the vertical direction; the telescopic part is a columnar body, is arranged in the blind hole of the fixing seat and is in sliding fit with the blind hole of the fixing seat. The lower tip of pars contractilis, spring, proximity switch assemble in the blind hole of fixing base in proper order, and the lower tip of pars contractilis, spring, proximity switch and the blind hole bottom of fixing base laminate in proper order, and the spring is in by compressed state, and the pars contractilis can slide from top to bottom for the fixing base. When no medicine decocting pot is arranged on the gas stove, although the spring is in a compressed state, the compression amount is small, the elasticity of the spring is small, and the approach switch cannot be triggered to send an approach signal; however, when the medicine decocting pot is placed on the gas stove, the approach bracket is heavily pressed by the medicine decocting pot, as shown in fig. 1, the telescopic part of the approach bracket moves downwards, the spring is further compressed, the elastic force of the spring is increased, and the approach switch is triggered to generate an approach signal, which indicates that the medicine decocting pot is arranged on the gas stove. The proximity sensor 250 selects a light-touch mechanical proximity switch, and the mechanical proximity switch and the proximity bracket are integrated into a component to form a proximity assembly, so that the proximity sensor is convenient to install and maintain, can reduce the number of exposed parts in the gas stove, and is also beneficial to reducing the cost of the proximity sensor 250 due to the selection of the mechanical proximity switch.

It should be noted that: the proximity sensor 250 may also be a non-contact photoelectric proximity sensor. The photoelectric proximity sensor is assembled with the burner 210 by a fixing frame, and as shown in fig. 9, the photoelectric proximity sensor is located at the lower end side of the detection hole 2114, and the detection end portion of the photoelectric proximity sensor is arranged vertically upward, facing the detection hole 2114. The photoelectric proximity sensor can detect whether the medicine decocting pot 100 is arranged on the burner or not through the detection hole 2114. In addition, the photoelectric proximity sensor can also be arranged on a top case of the gas stove, and the detection end of the photoelectric proximity sensor is opposite to a medicine decocting pot arranged on the gas stove.

As shown in fig. 6, the electrically controlled gas assembly 220 includes an electromagnetic valve 221 and an electrically controlled gas valve, and the electrically controlled gas valve includes a plug valve 222, a motor 223 and a speed reducing mechanism 224. The plug valve 222 is a plug valve commonly used in the gas stove of the prior art and is provided with an air inlet and two air outlets; one of the two air outlets is a large-flow air outlet, and the other air outlet is a small-flow air outlet. The output shaft of the motor 223 is connected to the valve stem shaft of the plug valve 222 through the speed reduction mechanism 224 to drive the valve stem to rotate, and the valve opening of the plug valve 222 is adjusted to change the flow rate of the gas flowing into the burner, so as to adjust the fire power of the gas range 200. The gas inlet of the electromagnetic valve 221 is communicated with a gas pipe positioned in a gas stove, the gas outlet of the electromagnetic valve 221 is communicated with the gas inlet of the plug valve 222, the large-flow gas outlet of the plug valve 222 is communicated with the input port of the outer ring nozzle 214b assembled on the furnace end 211, and the small-flow gas outlet of the plug valve 222 is communicated with the input port of the inner ring nozzle 214a assembled on the furnace end 211. The motor 223 is a stepping motor. Motor 223 is coupled to the valve stem shaft of plug valve 222. Alternatively, the stepper motor may be replaced by a servo motor or a variable frequency motor, which must be coupled to the valve stem shaft of the plug valve 222 through a speed reducer, such as speed reduction mechanism 224.

In addition, it should be noted that: the electrically controlled gas valve, as shown in fig. 10, may also be constituted by a proportional valve 222 ', and the electrically controlled gas valve includes at least two proportional valves 222 ', which two proportional valves 222 ' are respectively identified as a 1 st proportional valve 222a ' and a 2 nd proportional valve 222b '. The rated flow rate of the 2 nd proportional valve 222a 'is larger than that of the 1 st proportional valve 222 b', so that the outer ring fire of the burner 210 is larger than the inner ring fire, and the medicine decocting pot can be heated more uniformly. The air outlet of the electromagnetic valve 221 'and the air inlets of the 1 st proportional valve 222 a' and the 2 nd proportional valve 222b 'are respectively communicated and fixed to form the electrically controlled gas valve assembly 220'. Furthermore, the proportional valve may be replaced by an electrically controlled flow valve such as a servo valve, a proportional servo valve, and a mass flow controller.

As shown in fig. 9, the gas range case 260 includes a bottom range case 261 and a top range case 262. The kitchen bottom shell 261 is made of a thin steel plate through stamping. An installation position for installing the burner 210 and the electric control gas valve assembly 220 is arranged in the stove bottom shell 261; and mounting sites for mounting the controller 300 and the power supply 310. The cooktop case 262 is provided with a through hole for the burner 210 and the valve stem to pass through.

Controller 300

As shown in fig. 11, the controller 300 includes a microprocessor, a memory, a sensor circuit, a network module, a display driver, a keyboard interface circuit, a solenoid driver, a motor driver, a pulse ignition circuit, and a decocting program built in the memory. The memory, the sensor circuit, the network module, the display driving circuit, the keyboard interface circuit, the electromagnetic valve driving circuit, the motor driving circuit and the ignition circuit are respectively and electrically connected with the microprocessor. The touch screen is electrically connected with the controller 300 through the display driving circuit; a mobile terminal, such as a mobile phone, a tablet computer, etc., establishes a communication connection with the controller 300 via a network module (router); the thermocouple 150, the overflow sensor 160, the flame detection pin 240, and the proximity sensor 250 are electrically connected via a sensor circuit and the controller 300, respectively; the key module is electrically connected to the controller 300 via the keyboard interface circuit. The key module, the touch screen and the mobile terminal can be selected and matched according to needs, and the key module and the touch screen are preferred in the embodiment. The key module is embedded on the front of the range top case 262 of the gas range 200. The key module is provided with an ignition key, a flameout key, an increase key, a decrease key and an acknowledgement key, and the application software interface of the touch screen is also provided with the ignition key, the flameout key, the increase key, the decrease key and the acknowledgement key, which are used for manually operating the kettle and stove device to ignite, flameout, increase firepower, decrease firepower and modify the decoction program. The power supply 310 converts the commercial power into low-voltage dc power required by the controller 300 to supply power to the controller 300.

Decoction modality

The decoction form comprises a form table and form parameters. The program table is configured with temperature set values associated with time, and includes a data table composed of time set values and temperature set values. The program table comprises a plurality of program steps which form a medicine soaking stage, a temperature rising stage, a decocting stage and a temperature reducing stage required in the decocting process. The time setting in the program table will continue to the whole decoction cycle, covering drug infusion, temperature rise, decoction, and finally flameout. The programming parameters include one, two or more parameters, and the programming parameters are associated with a programming table, and are used in conjunction with the programming table, such that modifying the programming parameters optimizes the control of the controller 300 over the cooking process. The cooking program is stored in the memory of the controller 300. A user or a pharmacist with Chinese herbal medicine knowledge and decoction skills can modify and define the required decoction program by himself through a mobile terminal, a key module, a touch screen and other human-computer interaction interfaces, and the modified decoction program can be stored in a memory. A program table and program parameters for an alternative decoction program are shown below, wherein the program table comprises 7 program steps including the settings for "" temperature "" and "" time "".

A program table:

program parameters:

incubation temperature (/ ° c): 50;

temperature offset value (/ deg.C): 5;

temperature control tolerance (/%): 2

Sampling period (/ s): 10.

the "program table" includes "temperature" and "time". Wherein "temperature" means the temperature to be reached at the bottom of the kettle during the decoction process, optionally the temperature to be reached at the inner surface of the kettle bottom. The time represents that the temperature is gradually changed from the set value of the temperature in the previous program step to the set value of the temperature in the program step in the time period of the program step, can be selected as a slope change and is suitable for describing the speed of the change of the temperature, such as the speed and the speed of the temperature rise of the decoction; it should be noted that, for the 1 st program step, the set value of the temperature of the last program step can be understood as the temperature of the bottom of the kettle detected by the thermocouple before heating, and can also be understood as the set value of the temperature of the 1 st program step; for the former understanding, a further program step for increasing the temperature is required before the program step 1, and the temperature setting value of the program step is the same as that of the program step 1.

The program parameters include a temperature keeping temperature, a temperature deviation value, a temperature control tolerance and a sampling period. The 'heat preservation temperature' represents the temperature at which the liquid medicine needs to be maintained after the Chinese herbal medicines are decocted so as to make the liquid medicine suitable for taking. The "temperature offset value" represents a correction parameter for correcting temperature control deviation of the kettle temperature for correcting deviation of the kettle temperature controlled by the thermocouple relative to a temperature set value so that the heated temperature (bottom inner surface) of the decocting kettle is consistent with a desired set temperature. Factors that cause temperature control deviation of the thermocouple include: the position of the temperature measuring hole, the size of the thermal resistance at the bottom of the kettle, the difference of the thermocouples, the assembly deviation of the thermocouples, the aging and passivation of the thermocouples, the difference of the decocting kettle (such as thickness, thinness and material) and the like. The measured value of the kettle temperature detected by the thermocouple is numerically matched with the sum of the set value of the temperature obtained from the program table and the temperature offset value, so that the temperature at which the kettle is heated (the inner surface of the bottom of the kettle) reaches the set value of the temperature. For example, the expected temperature of the inner surface of the bottom of the decocting pot is 100 ℃, the set value of the temperature is 100 ℃, because the thermocouple is arranged in the temperature measuring hole below the inner surface of the bottom of the pot, and the thermal resistance between the inner surface of the bottom of the pot and the temperature measuring hole is large, when the detected temperature of the thermocouple is 100 ℃, the temperature of the inner surface of the bottom of the pot is less than 100 ℃, the temperature may be 98 ℃, the set temperature is not reached, namely, the temperature deviation is 2 ℃, and the temperature deviation can be corrected by a temperature deviation value, and the temperature deviation value is set to be 2 ℃. In this state, the set value of the temperature is 100 ℃ and the temperature deviation value is 2 ℃, the detection temperature of the thermocouple is 102 ℃, and when the temperature detected by the thermocouple reaches 102 ℃, the temperature of the inner surface of the bottom of the kettle reaches 100 ℃, namely the desired temperature. In addition, the temperature offset value can also be used to adjust the temperature setting in the decocting recipe, for example, the temperature offset value is increased by 2 ℃, which is equivalent to the temperature setting of each recipe step in the decocting recipe is increased by 2 ℃. The set value of the temperature deviation value is modified, so that the same program table can be suitable for decocting pots with different thicknesses and different materials; and can correct the assembly deviation of the thermocouple and the difference of the thermocouple itself to adapt the program tableUsed for decocting medicinal herbs. For example, when the thermocouple is replaced, the thermal condition of the decocting pot changes due to the difference and assembly deviation of the thermocouple, and the decocting pot needs to be adjusted before use, so that the program table is suitable for the decocting pot under the new working condition. An alternative way of tuning, e.g. at a certain temperature set point T₀A lower heating medicine decocting pot, a first-grade temperature measuring meter is adopted to measure the temperature value T of the inner surface of the bottom of the pot₁Adjusting the fire power of the gas stove to T₁And T₀When the measured value of the kettle temperature detected by the thermocouple is Tc, the measured value of the kettle temperature Tc is equal to the temperature set value T₀The difference therebetween is used as the initial set point of the temperature offset value. The temperature control tolerance represents the fluctuation range of the temperature measurement value of the decocting pot relative to the controlled target temperature; for example, a temperature control tolerance of 2% represents a relative value of 2% for the maximum deviation of the fluctuation range between the measured value of the kettle temperature (i.e., the controlled target temperature) and the temperature set point allowed by the controller, such as: if the set value of the temperature is 100 ℃ and the temperature control tolerance is 2%, the measured value of the kettle temperature (namely the controlled target temperature) is 98-102 ℃, and the measured value of the kettle temperature is considered to be equivalent to the set value of the temperature, namely the measured value of the kettle temperature reaches the set value. The relative values of the temperature deviations are defined herein as: the relative value of the temperature deviation is ABS (measured value of temperature-set value of temperature)/set value of temperature 100%. The "sampling period" represents the time interval between the controller taking the set point of the temperature from the program table and the measured value of the kettle temperature from the thermocouple, i.e., how often the controller exercises control over the kettle and stove device. The smaller the sampling period is set, the more accurate the control is.

Next, the operation flow of decocting the Chinese herbal medicine, the automatic decocting process and the control principle of the pot and stove device according to the present embodiment will be described below by taking the above-mentioned decocting program (without setting the temperature deviation parameter) as an example.

Method for operating a pot and stove device

S1: putting the Chinese herbal medicines into a kettle. The lid 130 of the decocting pot 100 is opened, the prepared Chinese herbal medicine is put into the decocting pot, and the lid is closed.

S2: and selecting a decoction program. The decocting program matched with the prescription requirement of the Chinese herbal medicine to be decocted is selected through the key module or the touch screen, and the controller 300 reads the corresponding decocting program from the internal memory.

S3: and (5) igniting and decocting. The controller 300 is configured with both "automatic" and "manual" decocting modes, with the "manual" decocting mode being the default. Selecting an 'automatic' decocting mode, pressing an 'ignition' key, and operating the gas stove 200 to ignite instantly by the controller 300 or operating the gas stove to ignite by time driving (namely, a reservation mode); the gas range 200 generates a flame to heat the decocting pot 100. The controller 300 sequentially performs medicine infusion, temperature rise, decoction, and temperature reduction according to the decoction program. In each control period, the controller collects the measured value of the kettle temperature detected by the thermocouple and obtains a set value of the temperature from the decoction program, and the controller performs operation processing based on the measured value and the set value of the kettle temperature to generate a control signal to control the electric control gas valve and adjust the firepower of the gas stove so that the measured value of the kettle temperature detected by the thermocouple reaches the set value until the decoction program is executed, thereby completing the decoction of the Chinese herbal medicines. The whole decocting process is automatically completed by the controller, and users do not need to participate.

S4: and finishing the decoction. The time of the decoction process is completed by the controller 300, and the decoction process is completed to complete the decoction of the Chinese herbal medicine. The controller 300 generates a control signal to trigger the boomer to give an alarm, and informs a user to take liquid medicine. If the heat preservation function is not selected, the controller 300 generates a control signal to operate and close the electromagnetic valve 221 forming the electric control gas valve assembly 220, so as to block the gas circulation and close the gas stove 200; if the heat preservation function is selected, the user does not take the liquid medicine for a long time, the controller 300 operates the gas range 200 to heat the decocting pot 100 according to the set value of the 'heat preservation temperature' in the program parameters, so that the measured value of the pot temperature is equivalent to the set value of the heat preservation temperature, and the temperature of the decocted liquid medicine is maintained at the temperature required by the user.

Method and process for automatic control of decoction

The decoction regimen includes the schedule and regimen parameters. The program table is a table formed by time and temperature, and comprises a plurality of program steps, and the number of the program steps is determined according to the decocting requirement without specific requirements. The formula table covers the medicine soaking stage, the temperature rising stage, the decocting stage and the temperature lowering stage which are necessary in the decocting process of the Chinese herbal medicines. In order to improve the efficacy of the traditional Chinese medicine liquid, some traditional Chinese medicine prescriptions require normal-temperature medicine infusion, some require medicine infusion within a certain temperature range, some require slow temperature rise to the highest temperature, some require strong fire (with a higher temperature set value) decoction, some require slow fire (with a lower temperature set value) decoction, and the like, which can be realized by the time and temperature set values in a program table. The formulation and modification of the schedule of the decoction form needs to be conducted under the guidance of or by the pharmacist. The program table of the decoction formula in the embodiment exists in a table form, so that parameter modification is very convenient, the corresponding program table is quickly set for different Chinese herbal medicine prescriptions, and the decoction with higher medicine effect is favorably decocted.

The schedule for the decoction program includes 7 program steps. Wherein, the step of the 1 st formula corresponds to the medicine soaking stage, the medicine soaking temperature is 35 ℃, and the medicine soaking time is 30 Min; the 2 nd to 3 rd program steps correspond to the temperature rise stage, the 2 nd program step raises the temperature faster from 35 ℃ to 95 ℃ after 3 minutes, the 3 rd program step raises the temperature slower than the 2 nd program step and from 95 ℃ to 105 ℃ after 2 minutes, and the proper temperature rise rate is set, so that the foam generation can be effectively reduced, and the overflow is avoided; step 4-6, corresponding to the decocting stage, extracting effective components of Chinese herbal medicines, wherein the decocting temperature in step 4 is 105 deg.C, the decocting time is 10Min, the temperature in step 5 is decreased from 105 deg.C to 100 deg.C after 1 Min, the decocting temperature in step 6 is 100 deg.C, and the decocting time is 10 Min; and 7, correspondingly cooling, namely, reducing the temperature from 100 ℃ to 70 ℃ within 5 minutes so that the decocted liquid medicine is cooled at a certain cooling rate. It should be noted that if the prescription of the Chinese herbal medicine does not require the temperature of the decocted liquid medicine to be reduced at a certain rate, the 7 th procedure step may not be set. In each sampling period, the controller 300 obtains the set value of the temperature from the program table by using an interpolation method, and it is understood that the controller 300 divides the time period corresponding to the time set value of the current program step into a plurality of corresponding small time periods according to the sampling period, for example, 10s, each small time period corresponding to one sampling period, and obtains the set value of the temperature corresponding to each sampling period by using the interpolation method according to the set value of the temperature of the previous program step and the set value of the temperature of the current program step. If the value is taken by using the linear internal difference method, the temperature of each program step is changed from the set value of the temperature of the previous program step to the set value of the temperature of the program step in a slope manner, namely the slope change; for the 1 st program step, it is understood that the set value of the temperature in the last program step is the same as the set value of the temperature in the 1 st program step. In addition, the linear interpolation method can be replaced by polynomial interpolation, Newton interpolation or other interpolation methods, so that the temperature between program steps is smoothly and excessively changed instead of the slope change. For example, taking the linear interpolation value of the 2 nd program step as an example, to illustrate how to obtain the set value of the temperature from the program table, assuming that the sampling period is 10s, the 9 th control/sampling period of the 2 nd program step, i.e. the 90 th s, corresponds to 1 minute 30 seconds of the 2 nd program step, and the set value of the temperature obtained from the 2 nd program step in the 9 th control period is 65 ℃ by using the linear interpolation method.

In the automatic decocting process, the controller 300 sequentially executes each program step of the program table based on the obtained decocting program, controls the fire power of the gas stove 200, heats the decocting pot 100 to make the measured value of the pot temperature reach the set value of the temperature, sequentially performs the operations of soaking, heating, decocting and cooling, automatically decocts the Chinese herbal medicine until the program table is sequentially executed, and completes the decocting of the Chinese herbal medicine, and in the decocting process, the user does not need to participate in the control of the decocting fire power and time.

The controller 300 executes the 1 st program step. The 1 st program step is a medicine soaking stage, and in each control/sampling period, the controller 300 acquires a set temperature value from the 1 st program step, acquires a detection signal of the thermocouple 150, acquires a measured kettle temperature value, generates a control signal based on the measured kettle temperature value and the set temperature value, operates the electrically controlled gas valve, and adjusts the fire power of the gas stove 200 so that the measured kettle temperature value is equivalent to the set temperature value, that is, the set temperature value is reached. After the time of the 1 st program step is executed, the 2 nd program step is executed.

In each control/sampling cycle of the 2 nd program step, the controller 300 acquires the detection signal of the thermocouple 150 to obtain the temperature measurement value of the kettle, and uses the linear internal difference method to obtain the temperature setting value from the 2 nd program step. The controller 300 compares the acquired measured value of the kettle temperature with the set value of the temperature, when the measured value of the kettle temperature is smaller than the set value of the temperature, the controller 300 generates a control signal which increases the firepower of the gas stove through calculation, the control signal is sent to the motor driving circuit to drive the motor to rotate, the motor drives the valve rod of the plug valve 222 to rotate, the opening degree of the plug valve 222 is increased, the firepower of the gas stove 200 is increased, so that the temperature of the decocting kettle 100 is increased until the acquired measured value of the kettle temperature is equivalent to the set value of the temperature; when the acquired pot temperature measurement value is greater than the acquired temperature set value, the controller 300 generates a control signal for reducing the gas stove fire through calculation, and sends the control signal to the motor driving circuit to drive the motor to rotate in the reverse direction, the motor drives the valve rod of the plug valve 222 to rotate in the reverse direction, the opening degree of the plug valve 222 is reduced, and the fire of the gas stove 200 is reduced, so that the temperature of the decocting pot 100 is reduced until the acquired pot temperature measurement value reaches the temperature set value; thus, the controller 300 completes the 2 nd program step. After the step 2 is executed, the controller 300 sequentially executes the steps 3 to 7 by using the above control method until each step of the program table is executed, thereby completing the decoction of the Chinese herbal medicine.

When the controller 300 performs arithmetic processing on the acquired pot temperature measurement value and temperature set value to generate a control signal for adjusting the gas range fire power, the arithmetic processing method used may be a PT (proportional integral) control algorithm, a PD (proportional derivative) control algorithm, or a PID (proportional integral derivative) control algorithm with higher control accuracy.

When the decoction program is executed by the controller 300, the decoction of the Chinese herbal medicine is completed, at this time, the controller 300 generates a control signal to trigger the alarm to sound, the user is informed, and the decoction can be taken out after the decoction is finished. In the whole decocting process, the user does not need to participate, and the decocting is automatically finished by the pot and stove device.

In the automatic decocting process, in each control/sampling period, the controller 300 further obtains a detection signal of the overflow sensor 160, determines that the decocting pot is in an overflow state based on the detection signal of the overflow sensor 160, and the controller 300 generates a control signal for reducing the fire power of the gas stove and controls the electrically controlled gas valve to reduce the fire power of the gas stove 200 so as to directly eliminate the overflow of the decocting pot 100 and avoid the continuous overflow; while controller 300 performs overflow counting. When the overflow count is greater than the count threshold, such as the count is greater than 3 times, particularly when a continuous overflow count occurs, the controller 300 also performs the following overflow process.

When the overflow count is greater than the count threshold, the controller 300 compares the temperature setting value corresponding to the control period at which the overflow occurs, which is obtained from the decocting process, with the temperature setting value of the current process step, calculates a difference between the temperature setting value and the temperature setting value of the current process step, and identifies the difference as a 1 st adjustment value. When the acquired temperature setting value corresponding to the control period at the moment of overflow occurrence is lower than the current program step temperature setting value, if the difference between the temperature setting value and the program step temperature setting value is 4-8 ℃, the program step temperature setting value in the program table is over high, at the moment, the controller 300 reduces the temperature deviation value setting value in the program parameters, so that the controlled target temperature of the decocting pot 100 is wholly translated downwards, and the controlled target temperature of the pot is reduced, so as to reduce the overflow occurrence rate; the magnitude of the decrease in the set point of the temperature offset value may be determined based on the 1 st adjustment magnitude, optionally as a fractional magnitude of the 1 st adjustment magnitude, such as 1/3, 1/2, or 2/3 where the magnitude of the decrease is the 1 st adjustment magnitude. When the acquired temperature setting value corresponding to the control cycle at which the overflow occurs is higher than the temperature setting value of the program step, if the difference between the acquired temperature setting value and the temperature setting value of the current program step is 1-3 ℃, that is, the temperature setting value corresponding to the overflow approaches the temperature setting value of the current program step, the controller 300 decreases the temperature setting value of the current program step in the program table, decreases the temperature setting values of the program steps whose temperature setting values are not less than the temperature setting values of the program steps, decreases the temperature setting values and the temperature rising rate, gradually decreases the heating power of the heating device, and decreases the heating power until the overflow is avoided; the reduction range of the set point of the program step temperature can be determined according to the 1 st adjustment value, such as a partial value of the 1 st adjustment value, whose reduction range is 1/3, 1/2 or 2/3 of the 1 st adjustment value. It should be noted that, after the overflow occurs, the controller 300 may also decrease the set value of the temperature deviation value in the decoction process and the set value of the current process step temperature, in this case, in order to avoid the over-regulation, which results in the kettle temperature being too low, the sum of the decrease of the temperature deviation value and the decrease of the set value of the process step temperature should be smaller than the 1 st regulation value. After the controller 300 modifies the decocting program, the overflow count is processed by rule 0 to recover the value of 0.

After the controller 300 reduces and modifies the set value of the program step temperature or/and the set value of the temperature deviation value of the decocting program, the controller 300 counts the overflow flow again, and when the overflow count is larger than the counting threshold, the controller 300 modifies the decocting program again according to the method, and the cycle of the adjustment is repeated until the decocting program is executed, and the decocting of the Chinese herbal medicine is completed. After the decoction is completed, the user can save the decoction program modified by the controller 300 for the next use.

In addition, it should be noted that: the overflow sensor 160 may also be an ultrasonic sensor or a photoelectric sensor, which is used to detect the foam and the foam height on the liquid surface in the kettle, and detect the overflow state that the medicine decocting kettle will overflow and will not overflow, so as to avoid overflow. The overflow sensor 160 is fitted with a drug-decocting pot, as shown in fig. 4, which detects that the end is directly opposite to a window 135 in the lid 130, through which window 135 foam generated in the drug-decocting pot can be detected. When the liquid in the decocting pot 100 is heated to boiling, the liquid surface generates and gathers foam, when the height of the foam reaches a set height threshold value, if the top end surface of the foam contacts the pot cover, the overflow tendency is generated, and the possibility of overflow is generated, the controller 300 judges the overflow state, generates a control signal for reducing the firepower of the gas stove, and controls the electric control gas valve, so that the gas stove 200 reduces the firepower, the foam generated in the decocting pot 100 is reduced or even eliminated, and the overflow is avoided. While controller 300 performs overflow counting.

In the automatic decocting process, in each control/sampling period, the controller 300 further acquires detection signals of the proximity sensor 250 and the flame detection needle 240, the controller 300 judges that no flame exists on the gas stove based on the detection signals of the flame detection needle, and when a medicine decocting pot is judged to exist on the gas stove based on the detection signals of the proximity sensor, the controller 300 generates a control signal to operate the ignition to ignite the gas stove 200, and continues to execute the unexecuted decocting program until the decocting program is executed, so that the decocting of Chinese herbal medicines is completed, and the success of decocting is ensured; when no pot is on the gas stove, the controller does not operate the ignition to ignite the gas stove 200, so as to avoid the gas stove from idle burning and wasting gas. If the ignition is not successful for multiple times, the controller 300 generates an alarm signal to trigger alarm, so as to warn a user to participate in processing and eliminate faults. In the automatic decocting process, when the controller 300 determines that there is no decocting pot 100 on the gas stove 200, if the decocting pot 100 is taken up but the decocting process is not executed, after a certain time, for example, 1 minute, the controller 300 will generate a control signal to operate the electromagnetic valve 221 constituting the electrically controlled gas valve assembly 220 to close, thereby blocking the gas circulation, extinguishing the burner, and avoiding the gas stove from being empty and wasting gas.

Here, it should be noted that, if the "temperature deviation value" parameter is adopted, in the process of automatically decocting the Chinese herbal medicines, the controller sequentially executes each program step of the decocting program, and in each control period, the controller compares the measured value of the kettle temperature with the sum of the set value of the temperature obtained from the decocting program and the temperature deviation value, and based on the measured value of the kettle temperature and the sum of the obtained set value of the temperature and the temperature deviation value, performs an operation process to generate a control signal to adjust the fire power of the gas cooker, so that the measured value of the kettle temperature reaches the sum of the set value of the temperature obtained from the decocting program and the temperature deviation value until the decocting program is completely executed by the controller, thereby completing the decocting of the Chinese herbal medicines.

The intelligent pot and stove device for decocting medicinal herbs of the embodiment comprises a decocting pot and a gas stove, and is configured with a thermocouple, a controller and a decocting program arranged in the controller. The medicine decocting pot comprises a pot body and a pot cover, wherein the pot body comprises a pot bottom and a pot body, the pot bottom is provided with a temperature measuring hole, the top of the pot body is provided with a pot opening, and the pot cover and the pot opening are mutually covered. The thermocouple is assembled in the temperature measuring hole and used for measuring the temperature of the bottom of the medicine decocting pot. The gas stove comprises a combustor and an electric control gas valve, wherein the electric control gas valve is arranged in an air inlet pipeline of the combustor and used for adjusting the fire power of the combustor. The medicine decocting pot is placed on the gas stove, the thermocouple and the overflow sensor are respectively and electrically connected with the controller through leads, and the gas stove heats the medicine decocting pot. The controller is embedded in the kettle body of the gas stove and used for controlling decoction. When the Chinese herbal medicines are decocted, the controller acquires a decoction form which meets the decoction requirement of the prescription of the decocted Chinese herbal medicines, and medicine soaking, temperature rising, decoction and temperature lowering are sequentially carried out according to the decoction form. Based on the decoction program, in each control/sampling period, the controller collects the measured value of the kettle temperature detected by the thermocouple and obtains a set value of the temperature from the decoction program, and performs operation processing based on the measured value of the kettle temperature and the set value of the temperature, such as PI (proportional integral) control algorithm, PD (proportional differential) control algorithm or PID (proportional integral differential) control algorithm with higher control precision, to generate a control signal, operate an electric control gas valve, adjust the firepower of the gas stove so as to enable the measured value of the kettle temperature to reach the set value of the temperature until the decoction program is executed, and finish the decoction of the Chinese herbal medicines. In the decocting process of the Chinese herbal medicines, the controller operates the electric control gas valve based on the decocting program to adjust the fire power generated by the gas stove to a required size, and the Chinese herbal medicine decoction with high drug effect can be decocted without participation of users and with or without decocting knowledge and skill of the users. In addition, the measuring end part of the thermocouple is arranged at the center of the bottom of the kettle, so that the temperature at the center of the bottom of the kettle can be detected, the temperature required to be controlled by the kettle can be reflected, and the accuracy of temperature detection is improved.

The medicine decocting pot is also provided with an overflow sensor. The controller collects the detection signal of the overflow sensor, and based on the detection signal of the overflow sensor, when the judgment that the medicine decocting pot has an overflow state is made, the controller generates a control signal which reduces the fire power of the gas stove, operates the electric control gas valve, reduces the opening of the valve, reduces the fire power of the gas stove, weakens the overflow until the medicine decocting pot eliminates the overflow. When the overflow count is greater than the count threshold, the controller modifies the decocting program, decreases the set value of the temperature deviation value in the program parameters of the decocting program, decreases the set value of the program step temperature corresponding to the occurrence of overflow in the program table of the decocting program and decreases the temperature set value to be not lower than the set value of the temperature of each program step of the program step, so as to reduce until the occurrence of overflow is eliminated. The overflow state comprises a state that liquid in the kettle overflows and an overflow state that the foam in the kettle is about to overflow when the foam height in the kettle reaches the overflow condition and the foam is not overflowed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the foregoing description only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, specification, and equivalents thereof.

Claims

1. The utility model provides an intelligence kettle kitchen device of decocting medicinal herbs, mainly comprises decocting medicinal herbs kettle and gas-cooker, its characterized in that:

the device also comprises a controller used for decocting control, wherein the controller acquires a decocting program corresponding to the decocting requirement of the decocted Chinese herbal medicine, and the decocting program comprises a sampling period and a plurality of program steps; in each control period, the controller calculates and obtains a set value of the temperature corresponding to the current control period by adopting an interpolation method according to a sampling period configured in a decoction program, a set value of the temperature of the last program step in the decoction program, a set value of the time of the current program step and a set value of the temperature, processes the temperature based on a measured value of the kettle temperature detected by the thermocouple and the obtained set value of the temperature of the current control period, generates a control signal to operate the electric control gas valve, and adjusts the fire force of the burner so as to enable the measured value of the kettle temperature to reach the obtained set value of the temperature of the current control period until the decoction program is executed, thereby finishing the decoction of the Chinese herbal medicines.

2. The intelligent pot and stove device of claim 1, wherein:

the decoction program comprises a program table;

3. The intelligent pot and stove device of claim 2, wherein:

the decoction form also comprises form parameters, and the form parameters comprise temperature deviation value parameters for correcting temperature control deviation of the kettle temperature;

4. The intelligent pot and stove device of claim 1, wherein: the temperature measuring hole extends inwards from the edge of the bottom of the kettle along the radial direction and is terminated in the middle of the bottom of the kettle, and the measuring end of the thermocouple is attached to the blind end of the temperature measuring hole to detect the temperature of the middle of the bottom of the kettle.

5. The intelligent pot and stove device of claim 4, wherein: and the opposite end of the measuring end of the thermocouple is provided with an elastic piece which is in a compressed state so that the measuring end of the thermocouple is fully attached to the blind end part of the temperature measuring hole.

6. The intelligent pot and stove device of claim 1, wherein:

the electric control gas valve comprises a plug valve and a motor, and the motor is connected with a valve rod shaft of the plug valve; alternatively, the first and second electrodes may be,

7. The intelligent pot and stove device for decocting medicinal herbs according to any one of claims 1-6, characterized in that: the flame detector also comprises at least one of an ignition needle, a flame detection needle and an overflow sensor; the ignition needle is used for igniting the combustor, the flame detection needle is used for detecting whether flame exists on the combustor, and the overflow sensor is used for detecting the overflow state of the medicine decocting pot.

8. The intelligent pot and stove device of claim 7, wherein:

the controller collects a detection signal of the overflow sensor, generates a control signal to operate the electric control gas valve when the overflow state is determined to occur based on the detection signal of the overflow sensor, and reduces the firepower of the burner until the overflow state is eliminated; alternatively, the first and second electrodes may be,

9. The intelligent pot and stove device for decocting medicinal herbs according to any one of claims 1-6, characterized in that: the top of kettle body portion sets up along the turn-ups portion of circumference extension and surrounding a week, and this turn-ups position is located the outside of kettle mouth for collect the liquid that overflows in the decocte process.

10. The intelligent pot and stove device of claim 7, wherein: the top of kettle body portion sets up along the turn-ups portion of circumference extension and surrounding a week, and this turn-ups position is located the outside of kettle mouth for collect the liquid that overflows in the decocte process.

11. The intelligent pot and stove device of claim 10, wherein:

the overflow sensor is a thermocouple fixed with the flanging part, and the detection end part of the thermocouple is positioned on the inner side of the flanging part and is opposite to the overflow holes which are positioned on the kettle cover and arranged along the radial direction; alternatively, the first and second electrodes may be,