CN110934487A - Control method and device of pressure limiting valve and cooking appliance - Google Patents
Control method and device of pressure limiting valve and cooking appliance Download PDFInfo
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- CN110934487A CN110934487A CN201811116951.XA CN201811116951A CN110934487A CN 110934487 A CN110934487 A CN 110934487A CN 201811116951 A CN201811116951 A CN 201811116951A CN 110934487 A CN110934487 A CN 110934487A
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- 238000000034 method Methods 0.000 title claims abstract description 73
- 238000010411 cooking Methods 0.000 title claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 description 43
- 230000009471 action Effects 0.000 description 16
- 230000005484 gravity Effects 0.000 description 8
- 238000009835 boiling Methods 0.000 description 6
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- 238000005299 abrasion Methods 0.000 description 2
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/0802—Control mechanisms for pressure-cookers
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Abstract
The invention discloses a control method and device of a pressure limiting valve and a cooking appliance. The pressure limiting valve is used for sealing an exhaust port of the cooking appliance, and comprises an inner valve sealed on the exhaust port by pressure and an outer valve superposed with certain pressure and acting on the inner valve, wherein the control method comprises the following steps: detecting the state of the outer valve and the inner valve; judging whether the inner valve is inclined or not based on the states of the outer valve and the inner valve; and if the inner valve is judged to be inclined, controlling the electromagnetic valve to work so as to push the inner valve to reset. The invention solves the technical problem that the pressure limiting valve can incline to cause serious air leakage of the exhaust port in the prior art.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a control method and device of a pressure limiting valve and a cooking appliance.
Background
The double-section pressure limiting valve controls the pressure in the cooker through an inner pressure limiting device and an outer pressure limiting device which can be separated. The outer valve can be sucked by a driving device such as a motor, so that only the gravity of the inner valve acts on the exhaust port, the pressure in the cooker can be maintained to be the maximum pressure limiting pressure of the inner valve, and when the driving device puts down the outer valve to enable the outer valve to be overlapped with the inner valve, the pressure in the cooker can be maintained to be the maximum pressure limiting pressure of the inner valve and the outer valve.
In actual process, can take place following situation, cause the internal valve slope, the skew takes place for case and gas vent for the gas vent is in non-sealing state, causes the serious gas leakage of gas vent:
when only the inner valve acts on the exhaust port, the inner valve is easy to be overturned by steam in the cooker due to the light weight (about 36g) of the inner valve, so that the inner valve cannot be reset by itself, the exhaust port is always opened, a large amount of steam in the cooker is discharged, and constant-pressure exhaust in the cooker cannot be realized;
in the process that the driving device moves to suck the outer valve, the outer valve can deviate in the rising process and is in contact with the side face of the inner valve, so that the inner valve deviates, and the exhaust port is always in an opened state;
when the driving device moves to put down the outer valve, the outer valve can incline and is in contact with the side wall of the inner valve, so that the inner valve is inclined, and the exhaust port is always in an opened state.
Aiming at the problem that the pressure limiting valve in the prior art can incline to cause serious air leakage of an exhaust port, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a control method and device of a pressure limiting valve and a cooking utensil, and aims to at least solve the technical problem that the pressure limiting valve in the prior art is inclined to cause serious air leakage of an air outlet.
According to an aspect of an embodiment of the present invention, there is provided a control method of a pressure limiting valve for sealing an exhaust port of a cooking appliance, the pressure limiting valve including an inner valve sealed at the exhaust port by pressure and an outer valve which acts on the inner valve by superimposing a certain pressure, wherein the control method includes: detecting the state of the outer valve and the inner valve; judging whether the inner valve is inclined or not based on the states of the outer valve and the inner valve; and if the inner valve is judged to be inclined, controlling the electromagnetic valve to work so as to push the inner valve to reset.
In the embodiment of the invention, the electromagnetic valve is combined for control, whether the inner valve deviates or not is judged according to the states of the outer valve and the inner valve, and after the deviation of the inner valve is judged, the electromagnetic valve is controlled to work in a proper time period to push the pressure limiting valve to deviate and reset, so that the deviated pressure limiting valve resets, the technical effects of preventing the inner pressure limiting valve and the outer pressure limiting valve from deviating in the action process and improving the reliability of pressure limiting valve control are achieved, and the technical problem that the pressure limiting valve is inclined to cause serious air leakage of an air outlet in the prior art is solved.
Further, determining whether the inner valve is tilted based on the states of the outer valve and the inner valve includes: judging whether the state of the outer valve changes or not; if the state of the outer valve is judged to be changed, the inner valve is determined to be inclined; if the state of the outer valve is judged to be an opening state and the state of the inner valve is a putting-down state, detecting whether the reduction value of the pressure in the cooker of the cooking appliance in a first preset time period is larger than or equal to a preset value; if the decrease value of the pressure in the cooker is detected to be greater than or equal to the preset value, it is determined that the inner valve is tilted. Whether the state of the outer valve changes or not is judged, so that whether the outer valve is sucked up or put down by the driving device or whether only the inner valve acts on the exhaust port or not is judged, and whether the inner valve inclines or not is judged accurately.
Further, determining whether the state of the outer valve has changed includes: detecting whether the control driving mechanism drives the lever to move in a horizontal plane or not, wherein the control driving mechanism is connected with one end of the lever, the other end of the lever is provided with a permanent magnet, when the other end of the lever moves to a first position, the permanent magnet is positioned above the pressure limiting valve, the permanent magnet attracts the outer valve to enable the outer valve to be in an open state, and when the other end of the lever moves to a second position, the permanent magnet releases the outer valve to enable the outer valve to be in a put-down state; if the control driving mechanism drives the lever to move, the state of the outer valve is determined to be changed. The driving mechanism is controlled to drive the lever to move, so that the outer valve is sucked up or put down, and whether the inner valve is inclined or not is accurately judged.
Further, under the condition that the state of the outer valve is judged to be changed, the electromagnetic valve is controlled to work after waiting for a second preset time, so that the inner valve is pushed to reset. The outer valve can be accurately determined to finish the action by waiting for the second preset time, the inner valve is inclined, the electromagnetic valve is controlled to work at the moment, and the inner valve can be ensured to reset under the pushing action of the electromagnetic valve.
Further, the control solenoid valve works to push the internal valve to reset, including: and controlling the electromagnetic valve to work for a third preset time so as to push the internal valve to reset. The inner valve can be ensured to reset under the pushing action of the electromagnetic valve by controlling the electromagnetic valve to work for a period of time.
According to another aspect of the embodiments of the present invention, there is also provided a control device of a pressure limiting valve, the pressure limiting valve is used for sealing an exhaust port of a cooking appliance, the pressure limiting valve includes an inner valve sealed on the exhaust port by pressure and an outer valve which is superposed with a certain pressure and acts on the inner valve, wherein the control device includes: the detection module is used for detecting the states of the outer valve and the inner valve; the judging module is used for judging whether the inner valve is inclined or not based on the states of the outer valve and the inner valve; and the control module is used for controlling the electromagnetic valve to work to push the internal valve to reset if the internal valve is judged to be inclined.
According to another aspect of the embodiments of the present invention, there is also provided a cooking appliance including: an exhaust port; the pressure limiting valve is used for plugging an exhaust port of the cooking appliance and comprises an inner valve which is plugged on the exhaust port by pressure and an outer valve which is superposed with certain pressure and acts on the inner valve; a controller for detecting states of the outer valve and the inner valve, judging whether the inner valve is inclined based on the states of the outer valve and the inner valve, and generating a control signal if the inner valve is judged to be inclined; and the electromagnetic valve is connected with the controller and is used for working according to the control signal so as to push the internal valve to reset.
Further, the cooking appliance further includes: and the control driving mechanism is used for driving the lever to move in a horizontal plane, wherein the control driving mechanism is connected with one end of the lever, the other end of the lever is provided with a permanent magnet, when the other end of the lever moves to a first position, the permanent magnet is positioned above the pressure limiting valve, the permanent magnet attracts the outer valve to enable the outer valve to be in an open state, and when the other end of the lever moves to a second position, the permanent magnet releases the outer valve to enable the outer valve to be in a put-down state.
Further, the cooking appliance is an electric pressure cooker.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium including a stored program, wherein the program is executed to control a device on which the storage medium is located to execute the control method of the pressure limiting valve.
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, wherein the program executes the control method of the pressure limiting valve described above.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of controlling a pressure limiting valve according to an embodiment of the present invention;
FIG. 2 is a schematic view of an alternative cooking appliance liner according to embodiments of the present invention;
FIG. 3 is a flow chart of a control method of an alternative pressure limiting valve according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a control arrangement for a pressure limiting valve according to an embodiment of the present invention; and
fig. 5 is a schematic view of a cooking appliance according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided an embodiment of a method of controlling a pressure limiting valve, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system, such as a set of computer-executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than presented herein.
Optionally, the cooking appliance comprises a cooking appliance body having a cooking cavity with an exhaust opening and a pressure limiting valve for sealing the exhaust opening, wherein the pressure limiting valve comprises an inner valve sealed on the exhaust opening by pressure and an outer valve which is superposed with a certain pressure and acts on the inner valve.
Specifically, the cooking appliance may be an electric pressure cooker, and the pressure limiting valve may be a two-stage pressure limiting valve, wherein the inner valve pressure and the outer valve pressure may be set according to actual needs, in the embodiment of the present invention, the inner valve pressure is 40KPA, and the outer valve pressure is 70KP, that is, when the pressure in the cooking cavity is greater than 40KPA, the pressure in the cooking cavity jacks up the inner valve, and the inner valve no longer acts on the exhaust port; when the pressure in the cooking cavity is greater than 70KP, the pressure in the cooking cavity jacks up the inner valve and the outer valve, the whole pressure limiting valve does not act on the exhaust port any more, and the cooking appliance can normally exhaust air through the exhaust port.
Fig. 1 is a flowchart of a control method of a pressure limiting valve according to an embodiment of the present invention, as shown in fig. 1, the control method including the steps of:
step S102, states of the outer valve and the inner valve are detected.
In step S104, it is determined whether the inner valve is tilted or not based on the states of the outer valve and the inner valve.
And step S106, if the inner valve is judged to be inclined, controlling the electromagnetic valve to work so as to push the inner valve to reset.
Specifically, in order to judge whether the inner valve is inclined or not, the states of the outer valve and the inner valve need to be detected, if the state of the outer valve is detected to be changed from an open state to a put-down state, the current process is determined to be the process of putting down the outer valve, and the inner valve is inclined in the process; if the state of the outer valve is detected to be changed from the putting-down state to the opening state, the current process is determined to be the process of sucking up the outer valve, and the inner valve can be inclined in the process; if the state of the outer valve is detected to be the opening state all the time, the current process is determined to be a low-pressure continuous boiling stage, and the inner valve can be inclined in the process. Therefore, whether the inner valve is inclined or not can be accurately determined through state detection of the outer valve and the inner valve, the electromagnetic valve is further controlled to work under the condition that the inner valve is inclined, the electromagnetic valve push rod pushes the inner valve to move and leave the original position where the inner valve is inclined by the outer valve, when the electromagnetic valve push rod stops working and returns to the original position, the inner valve returns to the original position due to the action of gravity, the inner valve is not inclined any more, the exhaust port is sealed, and air leakage cannot occur.
According to the embodiment of the invention, the electromagnetic valve is combined for control, whether the inner valve deviates or not is judged according to the states of the outer valve and the inner valve, and after the deviation of the inner valve is judged, the electromagnetic valve is controlled to work in a proper time period to push the pressure limiting valve to deviate and reset, so that the deviated pressure limiting valve resets, the technical effects of preventing the inner pressure limiting valve and the outer pressure limiting valve from deviating in the action process and improving the reliability of pressure limiting valve control are achieved, and the technical problem that the pressure limiting valve is inclined to cause serious air leakage of the exhaust port in the prior art is solved.
Optionally, the determining whether the inner valve is tilted based on the states of the outer valve and the inner valve includes: judging whether the state of the outer valve changes or not; if the state of the outer valve is judged to be changed, the inner valve is determined to be inclined; if the state of the outer valve is judged to be an opening state and the state of the inner valve is a putting-down state, detecting whether the reduction value of the pressure in the cooker of the cooking appliance in a first preset time period is larger than or equal to a preset value; if the decrease value of the pressure in the cooker is detected to be greater than or equal to the preset value, it is determined that the inner valve is tilted.
Specifically, in the process of sucking up the outer valve or putting down the outer valve, the state of outer valve can change, and the outer valve can locally take place the slope in this process, and outer valve inner wall contacts and extrudes the inner valve body with the inner valve outer wall easily, causes the inner valve to take place the slope, and the focus of outer valve and inner valve is not on the case promptly, can appear sealed not gas leakage tightly.
When the outer valve is sucked up, the inner valve acts on the exhaust port independently, namely the inner valve is in a put-down state, steam is continuously generated in the cooker in the process, so that the pressure in the cooker reaches the pressure limiting pressure of the inner valve, the inner valve is jacked up by the steam, the exhaust port normally exhausts the steam, the exhaust amount is the same as the steam amount, the exhaust is uniform, and the pressure balance is maintained. However, since the inner valve has a light weight, if the inner valve is pushed by steam in the pot to incline and generate air leakage at the exhaust port in the pressure balancing process, the steam in the pot is rapidly discharged due to the local increase of the exhaust gap, the pressure in the pot is rapidly reduced, and thick soup in the pot is easy to overflow. Therefore, whether the inner valve is inclined can be determined by detecting whether the pressure in the pot is continuously reduced within a certain time.
It should be noted that the first preset time period and the preset value may be set according to actual needs, and it is only necessary to determine that the pressure in the pot is suddenly reduced, which is not specifically limited in the present invention.
Through above-mentioned scheme, through judging whether the state of outer valve changes to judge whether drive arrangement inhales the outer valve or puts down the outer valve, perhaps only the inner valve acts on the gas vent on, and then accurately judge out whether the inner valve takes place the slope.
Optionally, the determining whether the state of the outer valve changes includes: detecting whether the control driving mechanism drives the lever to move in a horizontal plane or not, wherein the control driving mechanism is connected with one end of the lever, the other end of the lever is provided with a permanent magnet, when the other end of the lever moves to a first position, the permanent magnet is positioned above the pressure limiting valve, the permanent magnet attracts the outer valve to enable the outer valve to be in an open state, and when the other end of the lever moves to a second position, the permanent magnet releases the outer valve to enable the outer valve to be in a put-down state; if the control driving mechanism drives the lever to move, the state of the outer valve is determined to be changed.
Furthermore, a first limiting column is arranged at the first position, a second limiting column is arranged at the second position, and the lever moves between the first limiting column and the second limiting column. In addition, the control driving mechanism is a motor, and a reinforcing sheet can be additionally arranged between the lever and the control driving mechanism to avoid abrasion of the lever in the moving process.
For example, as shown in fig. 2, a control driving mechanism 1, a lever 2, a permanent magnet 3, a limit post 4 (including a left limit post and a right limit post), and a reinforcing piece 5 are provided above the liner 0, wherein the control driving mechanism 1 drives the lever 2 to move, the lever 2 horizontally moves left and right, the pressure limiting valve is located right below the permanent magnet 3, and the reinforcing piece 5 is additionally provided between the control driving mechanism 1 and the lever 2. Wherein when the lever 2 is moved to the position of the left limit post (i.e. the second limit post) as described above (i.e. the second position as described above), the outer valve is lowered; when the lever 2 is moved to the position of the right limit post (i.e., the first limit post described above) (i.e., the first position described above), the outer valve is sucked up.
When the lever 2 moves from left to right, the permanent magnet is driven to move from the outer side of the outer valve to the central point, so that the outer valve can incline firstly and then is sucked up vertically, and the inner valve is inclined. After the lever 2 moves to the position of the right limiting column, the inner valve and the outer valve are both in a static state, and the inner valve and the outer valve are in an inclined state.
Similarly, when the lever 2 moves from right to left, the outer valve will also tilt during being lowered, resulting in the inner valve tilting
Through the scheme, the driving mechanism is controlled to drive the lever to move, so that the outer valve is sucked up or put down, and whether the inner valve is inclined or not is accurately judged.
Optionally, in the case that the state of the outer valve is judged to be changed, after waiting for a second preset time, the electromagnetic valve is controlled to work so as to push the inner valve to reset.
Specifically, the specific position of the lever cannot be accurately detected during the movement of the lever, so that a second preset time can be preset to ensure that the lever can move from the beginning to the stop within the time, and in the embodiment of the present invention, the second preset time is taken as 5s for example. After waiting for 5s, the inner valve and the outer valve can be determined to be in a static state, the inner valve inclines, the outer valve can be accurately determined to finish the action by waiting for the second preset time, the inner valve inclines, the electromagnetic valve is controlled to work at the moment, and the inner valve can be ensured to reset under the pushing action of the electromagnetic valve.
Optionally, controlling the solenoid valve to operate to push the internal valve to reset comprises: and controlling the electromagnetic valve to work for a third preset time so as to push the internal valve to reset.
Specifically, in order to further ensure that the internal valve can be reset under the pushing action of the electromagnetic valve, the electromagnetic valve may be controlled to operate for a period of time and then stop operating, where the third preset time may be 0 to 3 seconds, and in the embodiment of the present invention, 1 second is taken as an example for description.
Fig. 3 is a flowchart of a control method of an optional pressure limiting valve according to an embodiment of the present invention, taking an electric pressure cooker as an example, as shown in fig. 3, the method includes the following steps:
and step S31, the electric pressure cooker starts to work.
And step S32, detecting whether the motor starts to drive the lever to work, if the motor works and drives the lever to move towards the central position of the outer valve or towards the initial position, driving the electromagnetic valve to work after a certain time so as to push the driving valve to reset.
Optionally, when the motor drives the lever to move from left to right, after a certain time, it can be determined that the lever moves right above the pressure limiting valve, the inner valve and the outer valve are both in a static state, the inner valve collides with the outer valve and is in an inclined state, at this time, the electromagnetic valve push rod works to push the inner valve to move and leave the position where the inner valve is originally inclined by the outer valve, and when the electromagnetic valve push rod stops working and returns to the original position, the inner valve returns to the original position under the action of gravity and does not tilt and shift any more.
When the motor drives the lever to move from right to left, the lever can be determined to leave the position right above the pressure limiting valve after a certain time, at the moment, the electromagnetic valve push rod works to enable the inner and outer pressure limiting valves to move, the relative position between the inner and outer valves is adjusted, the gravity centers of the inner and outer valves are all located at the valve core position, when the electromagnetic valve push rod stops working and returns to the original position, the pressure limiting valve can also fall to the position of the sealed exhaust pipe due to gravity, the opening of the exhaust pipe is sealed, and air leakage cannot occur.
And step S33, if the pressure is in the low-pressure continuous boiling mode, the pressure in the cooker is continuously monitored after entering the boiling mode, and if the pressure is monitored to be rapidly reduced, the pressure in the cooker is judged to be leaked obliquely by the steam jack, and the electromagnetic valve is driven to work for a certain time to push the oblique pressure limiting valve to reset.
Alternatively, when the outer valve is sucked up and the inner valve is in working state as a pressure limiting valve, the process is a low-pressure continuous boiling process, and because the inner valve has light weight, the pressure limiting valve is pushed by the steam in the cooker to incline in the pressure balancing process, so that a large amount of air leakage occurs at the exhaust port, and at the moment, the steam in the cooker is rapidly exhausted from the cooker, the pressure is greatly reduced, and the cooker overflow is possibly generated because the exhaust gap is locally increased. When the detection device detects that the pressure is rapidly reduced, the pressure limiting valve is considered to be flushed by steam to generate an inclined condition, at the moment, the electromagnetic valve push rod works to push the inner valve to move and leave the position where the original outer valve is inclined, when the electromagnetic valve push rod stops working and returns to the original position, the inner valve returns to the original position under the action of gravity, and no inclined deviation occurs any more.
Through the scheme, the electromagnetic valve is driven to work in a proper time period by combining the work of the electromagnetic valve, so that the pressure limiting valve is pushed to deviate and reset, the deviated pressure limiting valve can be reset, and the internal and external valves are prevented from inclining in the action process to cause serious air leakage of the exhaust pipe opening.
Example 2
According to an embodiment of the present invention, an embodiment of a control device of a pressure limiting valve is provided.
Optionally, the cooking appliance comprises a cooking appliance body having a cooking cavity with an exhaust opening and a pressure limiting valve for sealing the exhaust opening, wherein the pressure limiting valve comprises an inner valve sealed on the exhaust opening by pressure and an outer valve which is superposed with a certain pressure and acts on the inner valve.
Specifically, the cooking appliance may be an electric pressure cooker, and the pressure limiting valve may be a two-stage pressure limiting valve, wherein the inner valve pressure and the outer valve pressure may be set according to actual needs, in the embodiment of the present invention, the inner valve pressure is 40KPA, and the outer valve pressure is 70KP, that is, when the pressure in the cooking cavity is greater than 40KPA, the pressure in the cooking cavity jacks up the inner valve, and the inner valve no longer acts on the exhaust port; when the pressure in the cooking cavity is greater than 70KP, the pressure in the cooking cavity jacks up the inner valve and the outer valve, the whole pressure limiting valve does not act on the exhaust port any more, and the cooking appliance can normally exhaust air through the exhaust port.
Fig. 4 is a schematic view of a control apparatus of a pressure limiting valve according to an embodiment of the present invention, as shown in fig. 4, including:
a detection module 42 for detecting the status of the outer and inner valves.
And a determination module 44 for determining whether the inner valve is tilted based on the states of the outer valve and the inner valve.
And the control module 46 is used for controlling the electromagnetic valve to work to push the internal valve to reset if the internal valve is judged to be inclined.
Specifically, in order to judge whether the inner valve is inclined or not, the states of the outer valve and the inner valve need to be detected, if the state of the outer valve is detected to be changed from an open state to a put-down state, the current process is determined to be the process of putting down the outer valve, and the inner valve is inclined in the process; if the state of the outer valve is detected to be changed from the putting-down state to the opening state, the current process is determined to be the process of sucking up the outer valve, and the inner valve can be inclined in the process; if the state of the outer valve is detected to be the opening state all the time, the current process is determined to be a low-pressure continuous boiling stage, and the inner valve can be inclined in the process. Therefore, whether the inner valve is inclined or not can be accurately determined through state detection of the outer valve and the inner valve, the electromagnetic valve is further controlled to work under the condition that the inner valve is inclined, the electromagnetic valve push rod pushes the inner valve to move and leave the original position where the inner valve is inclined by the outer valve, when the electromagnetic valve push rod stops working and returns to the original position, the inner valve returns to the original position due to the action of gravity, the inner valve is not inclined any more, the exhaust port is sealed, and air leakage cannot occur.
According to the embodiment of the invention, the electromagnetic valve is combined for control, whether the inner valve deviates or not is judged according to the states of the outer valve and the inner valve, and after the deviation of the inner valve is judged, the electromagnetic valve is controlled to work in a proper time period to push the pressure limiting valve to deviate and reset, so that the deviated pressure limiting valve resets, the technical effects of preventing the inner pressure limiting valve and the outer pressure limiting valve from deviating in the action process and improving the reliability of pressure limiting valve control are achieved, and the technical problem that the pressure limiting valve is inclined to cause serious air leakage of the exhaust port in the prior art is solved.
Example 3
According to an embodiment of the present invention, there is provided an embodiment of a cooking appliance.
Fig. 5 is a schematic view of a cooking appliance according to an embodiment of the present invention, as shown in fig. 5, the cooking appliance including: an exhaust port; the pressure limiting valve 52 is used for sealing an air outlet of the cooking utensil, the controller 54 and the electromagnetic valve 56, and the pressure limiting valve 52 comprises an inner valve 522 which is sealed on the air outlet by pressure and an outer valve 524 which is superposed with certain pressure and acts on the inner valve.
Specifically, the cooking appliance may be an electric pressure cooker, and the pressure limiting valve may be a two-stage pressure limiting valve, wherein the inner valve pressure and the outer valve pressure may be set according to actual needs, in the embodiment of the present invention, the inner valve pressure is 40KPA, and the outer valve pressure is 70KP, that is, when the pressure in the cooking cavity is greater than 40KPA, the pressure in the cooking cavity jacks up the inner valve, and the inner valve no longer acts on the exhaust port; when the pressure in the cooking cavity is greater than 70KP, the pressure in the cooking cavity jacks up the inner valve and the outer valve, the whole pressure limiting valve does not act on the exhaust port any more, and the cooking appliance can normally exhaust air through the exhaust port.
The controller 54 is configured to detect states of the outer valve and the inner valve, determine whether the inner valve is tilted based on the states of the outer valve and the inner valve, and generate a control signal if it is determined that the inner valve is tilted; the solenoid valve 56 is connected to the controller for operation in response to a control signal to actuate the internal valve to reset.
Specifically, in order to judge whether the inner valve is inclined or not, the states of the outer valve and the inner valve need to be detected, if the state of the outer valve is detected to be changed from an open state to a put-down state, the current process is determined to be the process of putting down the outer valve, and the inner valve is inclined in the process; if the state of the outer valve is detected to be changed from the putting-down state to the opening state, the current process is determined to be the process of sucking up the outer valve, and the inner valve can be inclined in the process; if the state of the outer valve is detected to be the opening state all the time, the current process is determined to be a low-pressure continuous boiling stage, and the inner valve can be inclined in the process. Therefore, whether the inner valve is inclined or not can be accurately determined through state detection of the outer valve and the inner valve, the electromagnetic valve is further controlled to work under the condition that the inner valve is inclined, the electromagnetic valve push rod pushes the inner valve to move and leave the original position where the inner valve is inclined by the outer valve, when the electromagnetic valve push rod stops working and returns to the original position, the inner valve returns to the original position due to the action of gravity, the inner valve is not inclined any more, the exhaust port is sealed, and air leakage cannot occur.
According to the embodiment of the invention, the electromagnetic valve is combined for control, whether the inner valve deviates or not is judged according to the states of the outer valve and the inner valve, and after the deviation of the inner valve is judged, the electromagnetic valve is controlled to work in a proper time period to push the pressure limiting valve to deviate and reset, so that the deviated pressure limiting valve resets, the technical effects of preventing the inner pressure limiting valve and the outer pressure limiting valve from deviating in the action process and improving the reliability of pressure limiting valve control are achieved, and the technical problem that the pressure limiting valve is inclined to cause serious air leakage of the exhaust port in the prior art is solved.
Optionally, the cooking appliance further comprises: and the control driving mechanism is used for driving the lever to move in a horizontal plane, wherein the control driving mechanism is connected with one end of the lever, the other end of the lever is provided with a permanent magnet, when the other end of the lever moves to a first position, the permanent magnet is positioned above the pressure limiting valve, the permanent magnet attracts the outer valve to enable the outer valve to be in an open state, and when the other end of the lever moves to a second position, the permanent magnet releases the outer valve to enable the outer valve to be in a put-down state.
Furthermore, a first limiting column is arranged at the first position, a second limiting column is arranged at the second position, and the lever moves between the first limiting column and the second limiting column. In addition, the control driving mechanism is a motor, and a reinforcing sheet can be additionally arranged between the lever and the control driving mechanism to avoid abrasion of the lever in the moving process.
For example, as shown in fig. 2, a control driving mechanism 1, a lever 2, a permanent magnet 3, a limit post 4 (including a left limit post and a right limit post), and a reinforcing piece 5 are provided above the liner 0, wherein the control driving mechanism 1 drives the lever 2 to move, the lever 2 horizontally moves left and right, the pressure limiting valve is located right below the permanent magnet 3, and the reinforcing piece 5 is additionally provided between the control driving mechanism 1 and the lever 2. Wherein when the lever 2 is moved to the position of the left limit post (i.e. the second limit post) as described above (i.e. the second position as described above), the outer valve is lowered; when the lever 2 is moved to the position of the right limit post (i.e., the first limit post described above) (i.e., the first position described above), the outer valve is sucked up.
When the lever 2 moves from left to right, the permanent magnet is driven to move from the outer side of the outer valve to the central point, so that the outer valve can incline firstly and then is sucked up vertically, and the inner valve is inclined. After the lever 2 moves to the position of the right limiting column, the inner valve and the outer valve are both in a static state, and the inner valve and the outer valve are in an inclined state.
Similarly, when the lever 2 moves from right to left, the outer valve will also tilt during being lowered, resulting in the inner valve tilting
Through the scheme, the driving mechanism is controlled to drive the lever to move, so that the outer valve is sucked up or put down, and whether the inner valve is inclined or not is accurately judged.
Example 4
According to an embodiment of the present invention, there is provided an embodiment of a storage medium including a stored program, wherein a device in which the storage medium is controlled to execute the control method of the pressure limiting valve in the above-described embodiment 1 when the program is executed.
Example 5
According to an embodiment of the invention, an embodiment of a processor for running a program is provided, wherein the program when running performs the control method of the pressure limiting valve in the above embodiment 1.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A control method of a pressure limiting valve, wherein the pressure limiting valve is used for sealing an exhaust port of a cooking appliance, the pressure limiting valve comprises an inner valve sealed on the exhaust port by pressure and an outer valve which acts on the inner valve by superposing certain pressure, and the control method comprises the following steps:
detecting the state of the outer valve and the inner valve;
determining whether the inner valve is tilted based on the states of the outer valve and the inner valve;
and if the inner valve is judged to be inclined, controlling the electromagnetic valve to work so as to push the inner valve to reset.
2. The control method according to claim 1, wherein determining whether the inner valve is tilted based on the states of the outer valve and the inner valve includes:
judging whether the state of the external valve changes or not;
if the state of the outer valve is judged to be changed, the inner valve is determined to be inclined;
if the state of the outer valve is judged to be an opening state and the state of the inner valve is a putting-down state, detecting whether the reduction value of the pressure in the pot of the cooking appliance in a first preset time period is larger than or equal to a preset value;
and if the detected reduction value of the pressure in the cooker is larger than or equal to the preset value, determining that the inner valve is inclined.
3. The control method of claim 2, wherein determining whether the state of the outer valve has changed comprises:
detecting whether a control driving mechanism drives a lever to move in a horizontal plane or not, wherein the control driving mechanism is connected with one end of the lever, a permanent magnet is arranged at the other end of the lever, when the other end of the lever moves to a first position, the permanent magnet is positioned above a pressure limiting valve, the permanent magnet attracts the outer valve to enable the outer valve to be in an open state, and when the other end of the lever moves to a second position, the permanent magnet releases the outer valve to enable the outer valve to be in a put-down state;
and if the control driving mechanism is detected to drive the lever to move, determining that the state of the outer valve is changed.
4. The control method according to claim 3, wherein in the case that the state of the outer valve is judged to be changed, the electromagnetic valve is controlled to work after waiting for a second preset time so as to push the inner valve to reset.
5. The control method of claim 1, wherein controlling operation of a solenoid valve to urge the internal valve to reset comprises:
and controlling the electromagnetic valve to work for a third preset time so as to push the internal valve to reset.
6. A control device of a pressure limiting valve is characterized in that the pressure limiting valve is used for sealing an exhaust port of a cooking utensil, the pressure limiting valve comprises an inner valve sealed on the exhaust port by pressure and an outer valve which is superposed with a certain pressure and acts on the inner valve, wherein the control device comprises:
a detection module for detecting the state of the outer valve and the inner valve;
the judging module is used for judging whether the inner valve is inclined or not based on the states of the outer valve and the inner valve;
and the control module is used for controlling the electromagnetic valve to work to push the internal valve to reset if the internal valve is judged to be inclined.
7. A cooking appliance, comprising:
an exhaust port;
the pressure limiting valve is used for plugging an exhaust port of the cooking appliance and comprises an inner valve which is plugged on the exhaust port by pressure and an outer valve which is superposed with certain pressure and acts on the inner valve;
a controller for detecting states of the outer valve and the inner valve, determining whether the inner valve is tilted based on the states of the outer valve and the inner valve, and generating a control signal if it is determined that the inner valve is tilted;
and the electromagnetic valve is connected with the controller and used for working according to the control signal so as to push the internal valve to reset.
8. The cooking appliance of claim 7, further comprising:
the control driving mechanism is used for driving the lever to move in the horizontal plane, wherein the control driving mechanism is connected with one end of the lever, a permanent magnet is arranged at the other end of the lever, when the other end of the lever moves to the first position, the permanent magnet is positioned above the pressure limiting valve, the permanent magnet is attracted to the outer valve, the outer valve is enabled to be in an open state, and when the other end of the lever moves to the second position, the permanent magnet releases the outer valve, and the outer valve is enabled to be in a put-down state.
9. The cooking appliance of claim 7, wherein the cooking appliance is an electric pressure cooker.
10. A storage medium, characterized in that the storage medium comprises a stored program, wherein the program, when executed, controls a device in which the storage medium is located to perform a control method of a pressure limiting valve according to any one of claims 1 to 5.
11. A processor, characterized in that the processor is adapted to run a program, wherein the program is run to perform the control method of a pressure limiting valve according to any of claims 1-5.
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| CN201811116951.XA CN110934487B (en) | 2018-09-25 | 2018-09-25 | Control method and device of pressure limiting valve and cooking appliance |
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| CN201811116951.XA CN110934487B (en) | 2018-09-25 | 2018-09-25 | Control method and device of pressure limiting valve and cooking appliance |
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