CN111508773B - Door opening and closing electric control system and method for household negative-pressure fresh-keeping cavity - Google Patents
Door opening and closing electric control system and method for household negative-pressure fresh-keeping cavity Download PDFInfo
- Publication number
- CN111508773B CN111508773B CN201910093520.4A CN201910093520A CN111508773B CN 111508773 B CN111508773 B CN 111508773B CN 201910093520 A CN201910093520 A CN 201910093520A CN 111508773 B CN111508773 B CN 111508773B
- Authority
- CN
- China
- Prior art keywords
- door
- door opening
- air
- closing
- negative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses a door opening and closing electric control system and a door opening and closing electric control method for a household negative-pressure fresh-keeping cavity, wherein the door opening and closing electric control system comprises a controller, a relay drive circuit, a door opening button and an air release electromagnetic valve; the door opening key is used for sending a first electric signal to the controller after receiving a door opening instruction; the controller is used for outputting a first control signal to the relay drive circuit after receiving the first electric signal; the relay driving circuit is used for controlling the air bleeding electromagnetic valve to be opened to bleed the negative-pressure fresh-keeping cavity after receiving the first control signal. The door opening and closing electric control system of the household negative-pressure fresh-keeping cavity realizes the automatic air-releasing function of the negative-pressure fresh-keeping cavity, and is particularly suitable for the condition that the household negative-pressure fresh-keeping cavity cannot be manually released when the vacuum degree is higher. When a user operates the door opening button to send out a door opening instruction, the controller controls the air release electromagnetic valve to automatically release air to the negative-pressure fresh-keeping cavity through driving the relay driving circuit.
Description
Technical Field
The invention relates to the technical field of household negative-pressure preservation, in particular to a door opening and closing electric control system and method for a household negative-pressure preservation cavity.
Background
The negative pressure state is beneficial to the long-time fresh keeping of the fruits and the vegetables. The negative pressure fresh-keeping cavity of the existing refrigerator exists in a drawer type mode, and the negative pressure fresh-keeping cavity is deflated manually. Specifically, before the drawer is opened, the air is deflated manually, and after the deflation is finished, the drawer is opened again. This method is only suitable for use in a case where the degree of vacuum is small (about 0.8kPa absolute pressure). In order to improve the fruit and vegetable preservation effect, the vacuum degree of the negative pressure preservation cavity needs to be improved, and the difficulty of manual air release is correspondingly increased along with the increase of the vacuum degree. When the vacuum degree reaches a certain degree, how to realize the deflation and then open the negative pressure fresh-keeping cavity is a technical problem which needs to be solved urgently.
In addition, in order to improve the use comfort of a household user, a vacuum pump (also called an air pump) with low noise and low cost needs to be used, the flow rate of the vacuum pump meeting the requirement is low, and at the moment, if a gap exists between a door plate of the vacuum cavity and the cavity, the negative pressure state cannot be achieved or the negative pressure state can be achieved only in a long time, so that the use experience of the user is seriously influenced.
Disclosure of Invention
The invention aims to overcome the defect that manual air release difficulty is correspondingly increased along with the increase of the vacuum degree of a household negative-pressure fresh-keeping cavity in the prior art, and provides an electric door opening and closing control system and method of the household negative-pressure fresh-keeping cavity capable of automatically releasing air.
The invention solves the technical problems through the following technical scheme:
the invention provides a door opening and closing electric control system of a household negative-pressure fresh-keeping cavity, which comprises a controller, a relay drive circuit, a door opening key and an air release electromagnetic valve, wherein the controller is connected with the relay drive circuit;
the door opening key is used for sending a first electric signal to the controller after receiving a door opening instruction;
the controller is used for outputting a first control signal to the relay drive circuit after receiving the first electric signal;
the relay driving circuit is used for controlling the air bleeding electromagnetic valve to be opened to bleed the negative-pressure fresh-keeping cavity after receiving the first control signal.
The door opening and closing electric control system of the household negative-pressure fresh-keeping cavity realizes the automatic air release function of the negative-pressure fresh-keeping cavity, and is particularly suitable for the condition that manual air release cannot be carried out when the vacuum degree of the household negative-pressure fresh-keeping cavity is large. In the scheme, after a user operates the door opening button to send out a door opening instruction, the controller controls the air release electromagnetic valve to automatically release air to the negative-pressure fresh-keeping cavity through the driving relay driving circuit.
Preferably, the door opening and closing electric control system further comprises an electromagnet top door mechanism, the electromagnet top door mechanism is arranged on the door body of the negative-pressure fresh-keeping cavity, and a magnet matched with the electromagnet top door mechanism is arranged on the negative-pressure fresh-keeping cavity;
the relay driving circuit is also used for controlling the current of the electromagnet door jacking mechanism to flow reversely after receiving the first control signal so as to generate repulsion with the magnet.
In this scheme, be provided with electro-magnet top door mechanism on the relevant position of the door body, the electro-magnet top door mechanism laminates with the magnet on the fresh-keeping cavity of negative pressure mutually when closing the door, and relay drive circuit control flows through the direction of the electric current of electro-magnet top door mechanism to the direction of force between control electro-magnet top door mechanism and the magnet. In this scheme, after the user operation button of opening the door sent out the instruction of opening the door, the controller passed through drive relay drive circuit control gassing solenoid valve and to the automatic gassing of negative pressure fresh-keeping cavity, and the current direction of still controlling the electromagnet overhead door mechanism of flowing through simultaneously is the adverse current to produce and the repulsion between the magnet, this repulsion helps the user just to pull open the door body in gassing rear.
Preferably, the electric open-close door control system further comprises an open-close door detection switch, an air suction pump and an air suction electromagnetic valve; the air exhaust electromagnetic valve is arranged between the air exhaust pump and the airflow passage of the negative pressure fresh-keeping cavity;
the opening and closing door detection switch is used for detecting the opening and closing states of the door body and sending a second electric signal to the controller when the door body is changed from opening to closing;
the controller is also used for outputting a second control signal to the relay drive circuit after receiving the second electric signal;
the relay driving circuit is also used for controlling the air exhaust electromagnetic valve to be opened and the air exhaust electromagnetic valve to be closed after receiving the second control signal, and controlling the air exhaust pump to exhaust air.
In the scheme, the state that the household negative pressure fresh-keeping cavity is changed from open to closed can be automatically detected through the open-close door detection switch, namely, the door closing action is automatically recognized, and the function of automatically exhausting the negative pressure fresh-keeping cavity is further controlled by the controller and the relay driving circuit through the air exhaust electromagnetic valve and the air exhaust pump.
Preferably, the relay driving circuit is further configured to control a current downstream of the electromagnet door lifting mechanism after receiving the second control signal, so as to generate an attractive force with the magnet.
In this scheme, the current direction through control electro-magnet overhead door mechanism is following current, utilizes the same and magnet inter attraction's of the other end principle of magnetic field direction for the door body is tighter with the fresh-keeping cavity laminating of negative pressure when bleeding automatically, and then has promoted the sealing performance of cavity, thereby makes the effect that can be faster, easier reach the negative pressure state among the air bleed process.
Preferably, the controller is further configured to time when the air pump pumps air, and send a third control signal to the relay driving circuit after a preset time is reached;
and the relay driving circuit is also used for controlling the air suction pump to stop sucking air after receiving the third control signal, controlling the air suction electromagnetic valve to be closed and controlling the electromagnet top door mechanism to be powered off.
In this scheme, the controller can time the process of bleeding, reaches the automatic shutdown after predetermineeing the time and bleeds, has realized that the back of closing the door bleeds and can the automatic shutdown bleed after suitable vacuum.
Preferably, the door opening and closing detection switch is further configured to send a third electrical signal to the controller when the door body is changed from being closed to being opened;
the controller is also used for outputting a fourth control signal to the relay driving circuit after receiving the third electric signal;
and the relay driving circuit is also used for controlling the electromagnet door jacking mechanism to be powered off after receiving the fourth control signal.
This scheme has realized the further control to electro-magnet top door mechanism when opening the door, and the electro-magnet pushes up door mechanism and the magnet phase separation that corresponds after opening the door promptly, no longer needs to produce the effort between the two, pushes up door mechanism outage to the electro-magnet this moment and does not produce power to reach energy-conserving purpose.
The invention also provides a door opening and closing electric control method of the household negative-pressure fresh-keeping cavity, which is realized based on the door opening and closing electric control system of the household negative-pressure fresh-keeping cavity;
the door opening and closing electric control method comprises the following steps:
the door opening key sends a first electric signal to the controller after receiving a door opening instruction;
the controller outputs a first control signal to the relay drive circuit after receiving the first electric signal;
and the relay driving circuit controls the air bleeding electromagnetic valve to be opened to bleed the negative-pressure fresh-keeping cavity after receiving the first control signal.
Preferably, the door opening and closing electric control system further comprises an electromagnet top door mechanism, the electromagnet top door mechanism is arranged on the door body of the negative-pressure fresh-keeping cavity, and a magnet matched with the electromagnet top door mechanism is arranged on the negative-pressure fresh-keeping cavity;
the door opening and closing electric control method further comprises the following steps:
and the relay driving circuit also controls the current of the electromagnet door jacking mechanism to flow reversely after receiving the first control signal so as to generate repulsion with the magnet.
Preferably, the electric open-close door control system further comprises an open-close door detection switch, an air suction pump and an air suction electromagnetic valve; the air exhaust electromagnetic valve is arranged between the air exhaust pump and the airflow passage of the negative pressure fresh-keeping cavity;
the door opening and closing electric control method further comprises the following steps:
the opening and closing door detection switch detects the opening and closing states of the door body and sends a second electric signal to the controller when the door body is changed from opening to closing;
the controller outputs a second control signal to the relay drive circuit after receiving the second electric signal;
and the relay driving circuit controls the air exhaust electromagnetic valve to be opened and the air exhaust electromagnetic valve to be closed after receiving the second control signal, and controls the air exhaust pump to exhaust air.
Preferably, the method for electrically controlling a switching door further comprises the steps of:
and the relay driving circuit also controls the current downstream of the electromagnet door jacking mechanism after receiving the second control signal so as to generate the attraction between the electromagnet door jacking mechanism and the magnet.
Preferably, the method for electrically controlling a switching door further comprises the steps of:
the controller is used for timing when the air suction pump sucks air and sending a third control signal to the relay drive circuit after preset time is reached;
and the relay driving circuit controls the air suction pump to stop sucking air after receiving the third control signal, controls the air suction electromagnetic valve to be closed, and controls the electromagnet top door mechanism to be powered off.
Preferably, the method for electrically controlling a switching door further comprises the steps of:
the opening and closing door detection switch sends a third electric signal to the controller when the door body is changed from being closed to being opened;
the controller outputs a fourth control signal to the relay drive circuit after receiving the third electric signal;
and the relay driving circuit controls the electromagnet door jacking mechanism to be powered off after receiving the fourth control signal.
The positive progress effects of the invention are as follows: the door opening and closing electric control system and the door opening and closing electric control method for the household negative-pressure preservation cavity realize the automatic air release function of the negative-pressure preservation cavity, and are particularly suitable for the condition that the household negative-pressure preservation cavity cannot be manually released when the vacuum degree is high. Furthermore, the direction of current flowing through the electromagnet door jacking mechanism is controlled to be reverse, so that repulsion force between the electromagnet door jacking mechanism and the magnet is generated, and the repulsion force is helpful for a user to pull the door body open after air bleeding. Further, can also the automatic identification close the action of door, further bleed the function that electromagnetic valve and aspiration pump carried out bleeding to the fresh-keeping cavity of negative pressure automatically through controller and relay drive circuit control, the current direction through control electro-magnet overhead door mechanism is following current for the door body is tighter with the fresh-keeping cavity laminating of negative pressure when bleeding automatically, and then has promoted the sealing performance of cavity, thereby make the effect that can be faster, easier reach the negative pressure state among the air bleed process.
Drawings
Fig. 1 is a schematic structural diagram of a door opening and closing electric control system of a household negative-pressure fresh-keeping cavity in embodiment 1 of the invention.
Fig. 2 is a schematic view of a connection relationship between a door opening and closing electric control system of a household negative-pressure fresh-keeping cavity and the negative-pressure fresh-keeping cavity in embodiment 1 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a door opening and closing electric control system for a household negative pressure fresh-keeping cavity, which includes a controller 1, a relay driving circuit 2, a door opening button 3, an air bleeding electromagnetic valve 4, an electromagnet top door mechanism 5, an opening and closing door detection switch 6, an air suction pump 7, an air suction electromagnetic valve 8, and a complete machine power supply 9. The controller 1 is implemented by a main control MCU (micro controller Unit). As shown in fig. 2, the electromagnet top door mechanism 5 is disposed on the door body of the negative pressure fresh-keeping chamber, and the negative pressure fresh-keeping chamber is provided with a magnet 10 adapted to the electromagnet top door mechanism 5. The air exhaust electromagnetic valve 8 is arranged between the air exhaust pump 7 and the airflow passage of the negative pressure fresh-keeping cavity.
The whole power supply 9 comprises 24V direct current (volt) and 5V direct current, the 5V direct current supplies power for the controller 1 and the relay driving circuit 2, and the 24V direct current supplies power for the air suction pump 7, the door opening button 3, the air discharge electromagnetic valve 4, the air suction electromagnetic valve 8 and the electromagnet door jacking mechanism 5. The door opening key 3 is used for receiving the use information that the user needs to open the door and feeding back an electric signal to the controller 1. The door opening and closing detection switch 6 is used for detecting whether the door body is closed or not and feeding back an electric signal to the controller 1. The relay driving circuit 2 supplies power and transmits control signals for the electromagnet top door mechanism 5, the air pump 7, the air bleed electromagnetic valve 4 and the air bleed electromagnetic valve 8 through a double-open four-system relay. The suction pump 7, the air bleeding solenoid valve 4, the air bleeding solenoid valve 8, and the exhaust pump (not shown in the figure) are control devices in the air flow path. The electromagnet door jacking mechanism 5 has different internal current directions according to different received signals, so that the attraction force or the repulsion force between the door body and the cavity is generated as required.
In this embodiment, the door opening key 3 is configured to send a first electrical signal to the controller 1 after receiving a door opening instruction; the controller 1 is used for outputting a first control signal to the relay driving circuit 2 after receiving the first electric signal; the relay driving circuit 2 is used for controlling the air release electromagnetic valve 4 to be opened to release air to the negative pressure fresh-keeping cavity after receiving the first control signal, and meanwhile, the relay driving circuit 2 also controls the current of the electromagnet top door mechanism 5 to flow reversely so as to generate repulsion force between the electromagnet top door mechanism and the magnet 10. In this embodiment, the door opening button may be a common switch, a touch switch, a voice control switch, or the like.
In this embodiment, the door opening and closing detection switch 6 is used for detecting the opening and closing states of the door body, and sending a second electrical signal to the controller 1 when the door body is changed from opening to closing, and sending a third electrical signal to the controller 1 when the door body is changed from closing to opening. The controller 1 is also used for outputting a second control signal to the relay driving circuit 2 after receiving the second electric signal; the relay driving circuit 2 is also used for controlling the air exhaust solenoid valve 8 to be opened and the air exhaust solenoid valve 4 to be closed after receiving a second control signal, controlling the air exhaust pump 7 to exhaust the negative pressure preservation cavity, and simultaneously controlling the current direction of the electromagnet top door mechanism 5 to be downstream so as to generate a suction force with the magnet 10. The controller 1 is also used for outputting a fourth control signal to the relay driving circuit 2 after receiving the third electric signal; the relay driving circuit 2 is also used for controlling the electromagnet door jacking mechanism 5 to be powered off after receiving the fourth control signal. In the embodiment, the electromagnet door jacking mechanism is controlled when the door is opened, namely the electromagnet door jacking mechanism is separated from the corresponding magnet after the door is opened, acting force is not required to be generated between the electromagnet door jacking mechanism and the corresponding magnet, and the electromagnet door jacking mechanism is powered off at the moment to avoid generating force so as to achieve the aim of saving energy.
In the present invention, the opening and closing door detection switch may be a hall switch, a photo resistor, or the like. The opening and closing door detection switch in the embodiment is realized by adopting a photosensitive resistor. When opening the door, the photo resistance is brightened by dark, and the gassing solenoid valve is opened this moment, carries out the gassing operation to the fresh-keeping cavity of negative pressure, and mutual exclusion between two system relay control electro-magnet overhead door mechanisms of opening and magnet can be manually opened or open a body through electronic hydraulic pressure vaulting pole after the poor balance of external pressure in the cavity. When the door is closed, the photoresistor is bright and dark, the air discharge electromagnetic valve is closed at the moment, the air exhaust electromagnetic valve and the air exhaust pump are opened, the negative pressure fresh-keeping cavity is exhausted, the double-open four-system relay controls the electromagnet top door mechanism and the magnet to attract each other to automatically attract the door body, and a negative pressure state in the cavity is formed along with the air exhaust.
In this embodiment, the controller 1 is further configured to time the air-extracting time of the air-extracting pump 7, and send a third control signal to the relay driving circuit 2 after a preset time is reached; the relay driving circuit 2 is also used for controlling the air suction pump 7 to stop air suction after receiving a third control signal, and simultaneously controlling the air suction electromagnetic valve 8 to be closed and controlling the electromagnet top door mechanism 5 to be powered off. In the embodiment, in the air exhaust process, the timing function of the controller can be transmitted to the controller after the vacuum degree sensor receives a signal so as to execute subsequent actions, specifically, the air exhaust is automatically stopped after the preset time is reached, and the function of automatically stopping the air exhaust after the door is closed and the air exhaust is carried out to the proper vacuum degree is realized.
The door opening and closing electric control system of the household negative-pressure fresh-keeping cavity provided by the embodiment realizes the automatic air release function of the negative-pressure fresh-keeping cavity, and is particularly suitable for the condition that manual air release cannot be carried out when the vacuum degree of the household negative-pressure fresh-keeping cavity is large.
In this embodiment, the electromagnet top door mechanism is arranged at a corresponding position of the door body, when the door is closed, the electromagnet top door mechanism is attached to the magnet on the negative pressure preservation cavity, and the relay drive circuit controls the direction of current flowing through the electromagnet top door mechanism, so as to control the direction of force between the electromagnet top door mechanism and the magnet. When a user operates the door opening button to send out a door opening instruction, the controller controls the air release electromagnetic valve to automatically release air to the negative-pressure fresh-keeping cavity through the driving relay driving circuit, and simultaneously controls the current direction flowing through the electromagnet door jacking mechanism to be counter current so as to generate repulsion force between the electromagnet door jacking mechanism and the magnet, and the repulsion force is helpful for the user to conveniently pull open the door body after air release.
In this embodiment, the state that the household negative pressure preservation cavity is changed from open to closed can be automatically detected through the open/close door detection switch, that is, the action of closing the door is automatically identified, and the controller and the relay drive circuit are further used for controlling the air exhaust solenoid valve and the air exhaust pump to automatically exhaust the negative pressure preservation cavity. Simultaneously, the current direction of controlling the electromagnet top door mechanism through an electric appliance driving circuit is downstream, and the principle that the magnetic field direction is the same and the magnet at the other end attracts each other is utilized, so that the door body is attached to the negative pressure fresh-keeping cavity more tightly during automatic air exhaust, the sealing performance of the cavity is further improved, and the effect of reaching a negative pressure state in the air exhaust process can be achieved more quickly and easily.
The door opening and closing electric control system of the household negative-pressure fresh-keeping cavity provided by the embodiment simultaneously realizes the functions of providing assistance when opening and increasing sealing property when closing. The magnetic force between the electromagnet door jacking mechanism and the magnet can be dynamically adjusted according to the vacuum degree, so that the sealing can be easily opened and closed under the conditions of high vacuum degree, large cavity and the like.
Example 2
The embodiment provides a door opening and closing electronic control method for a household negative-pressure fresh-keeping cavity, which is implemented based on the door opening and closing electronic control system for the household negative-pressure fresh-keeping cavity described in embodiment 1.
The door opening and closing electric control method provided by the embodiment comprises the following steps:
the door opening key sends a first electric signal to the controller after receiving a door opening instruction;
the controller outputs a first control signal to the relay drive circuit after receiving the first electric signal;
the relay driving circuit controls the air release electromagnetic valve to be opened to release air to the negative pressure fresh-keeping cavity after receiving the first control signal, and simultaneously controls the current of the electromagnet top door mechanism to flow reversely to generate repulsion force between the electromagnet and the magnet.
The door opening and closing electric control method for the household negative-pressure preservation cavity realizes the automatic air release function of the negative-pressure preservation cavity, and is particularly suitable for the situation that manual air release cannot be carried out when the vacuum degree of the household negative-pressure preservation cavity is large. When a user operates the door opening button to send out a door opening instruction, the controller controls the air release electromagnetic valve to automatically release air to the negative-pressure fresh-keeping cavity through the driving relay driving circuit, and simultaneously controls the current direction flowing through the electromagnet door jacking mechanism to be counter current so as to generate repulsion force between the electromagnet door jacking mechanism and the magnet, and the repulsion force is helpful for the user to conveniently pull open the door body after air release.
The door opening and closing electronic control method provided by the embodiment further comprises the following steps:
the opening and closing door detection switch detects the opening and closing states of the door body and sends a second electric signal to the controller when the door body is changed from opening to closing;
the controller outputs a second control signal to the relay drive circuit after receiving the second electric signal;
the relay driving circuit controls the air exhaust electromagnetic valve to be opened and the air exhaust electromagnetic valve to be closed after receiving the second control signal, and controls the air exhaust pump to exhaust air; meanwhile, the current of the electromagnet top door mechanism is controlled to flow downstream so as to generate attraction with the magnet;
the controller is used for timing when the air pump pumps air and sending a third control signal to the relay driving circuit after preset time is reached;
and after receiving a third control signal, the relay driving circuit controls the air suction pump to stop air suction, controls the air suction electromagnetic valve to be closed, and controls the electromagnet door jacking mechanism to be powered off.
In this embodiment, the state that the household negative pressure preservation cavity is changed from open to closed can be automatically detected through the open/close door detection switch, that is, the action of closing the door is automatically identified, and the controller and the relay drive circuit are further used for controlling the air exhaust solenoid valve and the air exhaust pump to automatically exhaust the negative pressure preservation cavity. The current direction through controlling the electromagnet top door mechanism is downstream, and the principle that the magnetic field direction is the same and the magnet at the other end attracts each other is utilized, so that the door body is more tightly attached to the negative pressure fresh-keeping cavity when air is automatically extracted, the sealing performance of the cavity is further improved, and the effect of reaching a negative pressure state in the air extraction process can be quicker and easier. The controller can time the process of bleeding, and automatic shutdown is bled after reaching preset time, has realized closing the door and can automatic shutdown bleed after bleeding to suitable vacuum.
The door opening and closing electronic control method provided by the embodiment further comprises the following steps:
the door opening and closing detection switch sends a third electric signal to the controller when the door body is changed from closed to open;
the controller outputs a fourth control signal to the relay drive circuit after receiving the third electric signal;
and the relay driving circuit controls the electromagnet door jacking mechanism to be powered off after receiving the fourth control signal.
This embodiment has realized the further control to electro-magnet top door mechanism when opening the door, and the electro-magnet pushes up door mechanism and the magnet phase separation that corresponds after opening the door promptly, no longer needs to produce the effort between the two, pushes up door mechanism outage to the electro-magnet this moment and does not produce power to reach energy-conserving purpose.
In this embodiment, switching door detection switch detects the door body and by opening the signal that becomes closed after, transmits for master control MCU, and master control MCU output signal transmits to the air current control device through relay drive circuit, and the solenoid valve of bleeding switches to the open mode, and the bleed solenoid valve switches to the closed mode, and the aspiration pump is opened, and electro-magnet top door mechanism electric current is following current, produces suction. The master control MCU stops the air extraction of the air extraction pump after timing to a set time, and the air extraction electromagnetic valve is switched to a closed state; the electromagnet door jacking mechanism is powered off and does not generate force. When the door opening key collects the door opening information of a user, the door opening information is transmitted to the main control MCU, the main control MCU outputs a signal and transmits the signal to the airflow control device through the relay driving circuit, the air release electromagnetic valve is switched to an open state, and the current of the electromagnet door jacking mechanism flows reversely to generate repulsion force; and the main control MCU outputs signals and transmits the signals to the airflow control device through the relay drive circuit, and the electromagnet door jacking mechanism does not generate force when the power is off.
The door opening and closing electric control method for the household negative-pressure preservation cavity realizes the automatic air release function of the negative-pressure preservation cavity, and is particularly suitable for the situation that manual air release cannot be carried out when the vacuum degree of the household negative-pressure preservation cavity is large. Furthermore, the direction of current flowing through the electromagnet door jacking mechanism is controlled to be reverse, so that repulsion force between the electromagnet door jacking mechanism and the magnet is generated, and the repulsion force is helpful for a user to pull the door body open after air bleeding. Further, can also the automatic identification close the action of door, further bleed the function that electromagnetic valve and aspiration pump carried out bleeding to the fresh-keeping cavity of negative pressure automatically through controller and relay drive circuit control, the current direction through control electro-magnet overhead door mechanism is following current for the door body is tighter with the fresh-keeping cavity laminating of negative pressure when bleeding automatically, and then has promoted the sealing performance of cavity, thereby make the effect that can be faster, easier reach the negative pressure state among the air bleed process.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. An electric control system for opening and closing a door of a household negative-pressure fresh-keeping cavity is characterized by comprising a controller, a relay drive circuit, a door opening key and an air release electromagnetic valve;
the door opening key is used for sending a first electric signal to the controller after receiving a door opening instruction;
the controller is used for outputting a first control signal to the relay drive circuit after receiving the first electric signal;
the relay driving circuit is used for controlling the air bleeding electromagnetic valve to be opened to bleed the negative-pressure fresh-keeping cavity after receiving the first control signal; the door opening and closing electric control system further comprises an electromagnet door pushing mechanism, the electromagnet door pushing mechanism is arranged on the door body of the negative-pressure preservation cavity, and a magnet matched with the electromagnet door pushing mechanism is arranged on the negative-pressure preservation cavity;
the relay driving circuit is also used for controlling the current of the electromagnet door jacking mechanism to flow reversely after receiving the first control signal so as to generate repulsion with the magnet.
2. The door opening and closing electric control system of the household negative-pressure fresh-keeping cavity according to claim 1, further comprising an opening and closing door detection switch, an air pump and an air-extracting electromagnetic valve; the air exhaust electromagnetic valve is arranged between the air exhaust pump and the airflow passage of the negative pressure fresh-keeping cavity;
the opening and closing door detection switch is used for detecting the opening and closing states of the door body and sending a second electric signal to the controller when the door body is changed from opening to closing;
the controller is also used for outputting a second control signal to the relay drive circuit after receiving the second electric signal;
the relay driving circuit is also used for controlling the air exhaust electromagnetic valve to be opened and the air exhaust electromagnetic valve to be closed after receiving the second control signal, and controlling the air exhaust pump to exhaust air.
3. The door opening and closing electric control system of a household negative-pressure fresh-keeping cavity as claimed in claim 2, wherein the relay driving circuit is further used for controlling the current downstream of the electromagnet door jacking mechanism after receiving the second control signal so as to generate the attraction force with the magnet.
4. The door opening and closing electric control system of the household negative-pressure fresh-keeping cavity as claimed in claim 3, wherein the controller is further configured to time when the air pump pumps air, and send a third control signal to the relay driving circuit after a preset time is reached;
and the relay driving circuit is also used for controlling the air suction pump to stop sucking air after receiving the third control signal, controlling the air suction electromagnetic valve to be closed and controlling the electromagnet top door mechanism to be powered off.
5. The door opening and closing electric control system of the household negative-pressure fresh-keeping cavity as claimed in claim 2, wherein the door opening and closing detection switch is further used for sending a third electric signal to the controller when the door body is changed from being closed to being opened;
the controller is also used for outputting a fourth control signal to the relay driving circuit after receiving the third electric signal;
and the relay driving circuit is also used for controlling the electromagnet door jacking mechanism to be powered off after receiving the fourth control signal.
6. A door opening and closing electric control method of a household negative-pressure fresh-keeping cavity is characterized in that the door opening and closing electric control method is realized based on the door opening and closing electric control system of the household negative-pressure fresh-keeping cavity in claim 1;
the door opening and closing electric control method comprises the following steps:
the door opening key sends a first electric signal to the controller after receiving a door opening instruction;
the controller outputs a first control signal to the relay drive circuit after receiving the first electric signal;
the relay driving circuit controls the air release electromagnetic valve to be opened to release air to the negative-pressure fresh-keeping cavity after receiving the first control signal; the door opening and closing electric control system further comprises an electromagnet door pushing mechanism, the electromagnet door pushing mechanism is arranged on the door body of the negative-pressure preservation cavity, and a magnet matched with the electromagnet door pushing mechanism is arranged on the negative-pressure preservation cavity;
the door opening and closing electric control method further comprises the following steps:
and the relay driving circuit also controls the current of the electromagnet door jacking mechanism to flow reversely after receiving the first control signal so as to generate repulsion with the magnet.
7. The door opening and closing electric control method of the household negative-pressure fresh-keeping cavity according to claim 6, wherein the door opening and closing electric control system further comprises a door opening and closing detection switch, an air suction pump and an air suction electromagnetic valve; the air exhaust electromagnetic valve is arranged between the air exhaust pump and the airflow passage of the negative pressure fresh-keeping cavity;
the door opening and closing electric control method further comprises the following steps:
the opening and closing door detection switch detects the opening and closing states of the door body and sends a second electric signal to the controller when the door body is changed from opening to closing;
the controller outputs a second control signal to the relay drive circuit after receiving the second electric signal;
and the relay driving circuit controls the air exhaust electromagnetic valve to be opened and the air exhaust electromagnetic valve to be closed after receiving the second control signal, and controls the air exhaust pump to exhaust air.
8. The door opening and closing electric control method of the household negative-pressure fresh-keeping cavity as claimed in claim 7,
the door opening and closing electric control method further comprises the following steps:
and the relay driving circuit also controls the current downstream of the electromagnet door jacking mechanism after receiving the second control signal so as to generate the attraction between the electromagnet door jacking mechanism and the magnet.
9. The door opening and closing electric control method for the household negative-pressure fresh-keeping cavity according to claim 8, further comprising the following steps:
the controller is used for timing when the air suction pump sucks air and sending a third control signal to the relay drive circuit after preset time is reached;
and the relay driving circuit controls the air suction pump to stop sucking air after receiving the third control signal, controls the air suction electromagnetic valve to be closed, and controls the electromagnet top door mechanism to be powered off.
10. The door opening and closing electric control method for the household negative-pressure fresh-keeping cavity according to claim 7, further comprising the following steps:
the opening and closing door detection switch sends a third electric signal to the controller when the door body is changed from being closed to being opened;
the controller outputs a fourth control signal to the relay drive circuit after receiving the third electric signal;
and the relay driving circuit controls the electromagnet door jacking mechanism to be powered off after receiving the fourth control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093520.4A CN111508773B (en) | 2019-01-30 | 2019-01-30 | Door opening and closing electric control system and method for household negative-pressure fresh-keeping cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093520.4A CN111508773B (en) | 2019-01-30 | 2019-01-30 | Door opening and closing electric control system and method for household negative-pressure fresh-keeping cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111508773A CN111508773A (en) | 2020-08-07 |
| CN111508773B true CN111508773B (en) | 2021-08-20 |
Family
ID=71875709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910093520.4A Active CN111508773B (en) | 2019-01-30 | 2019-01-30 | Door opening and closing electric control system and method for household negative-pressure fresh-keeping cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111508773B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2901196Y (en) * | 2006-05-19 | 2007-05-16 | 博西华电器（江苏）有限公司 | Electric refrigerator with vacuum freshness preserving system |
| CN103017441A (en) * | 2011-09-28 | 2013-04-03 | 海尔集团技术研发中心 | Refrigerator with vacuumizing device and control method thereof |
| JP2015017736A (en) * | 2013-07-10 | 2015-01-29 | 日立アプライアンス株式会社 | Refrigerator |
| CN204787568U (en) * | 2014-06-24 | 2015-11-18 | 张光志 | Refrigerator with vacuum air exhaust |
| CN106595204A (en) * | 2017-01-18 | 2017-04-26 | 长葛市华晟电气有限公司 | Refrigerator provided with electromagnet on refrigerator body door |
-
2019
- 2019-01-30 CN CN201910093520.4A patent/CN111508773B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2901196Y (en) * | 2006-05-19 | 2007-05-16 | 博西华电器（江苏）有限公司 | Electric refrigerator with vacuum freshness preserving system |
| CN103017441A (en) * | 2011-09-28 | 2013-04-03 | 海尔集团技术研发中心 | Refrigerator with vacuumizing device and control method thereof |
| JP2015017736A (en) * | 2013-07-10 | 2015-01-29 | 日立アプライアンス株式会社 | Refrigerator |
| CN204787568U (en) * | 2014-06-24 | 2015-11-18 | 张光志 | Refrigerator with vacuum air exhaust |
| CN106595204A (en) * | 2017-01-18 | 2017-04-26 | 长葛市华晟电气有限公司 | Refrigerator provided with electromagnet on refrigerator body door |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111508773A (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10143786B2 (en) | Breast pump system | |
| CN111508773B (en) | Door opening and closing electric control system and method for household negative-pressure fresh-keeping cavity | |
| WO2024109507A1 (en) | Vacuum juicer capable of one-button automatic vacuumizing | |
| WO2017206267A1 (en) | Door frame assembly applied to microwave oven, and method and device for controlling door frame assembly | |
| CN102954642B (en) | Refrigerator | |
| CN201289614Y (en) | Electric curtain | |
| CN206608090U (en) | A kind of DC. rolling-door machine circuit | |
| RU2011143900A (en) | ELECTRIC VACUUM CLEANER | |
| CN103362790B (en) | A kind of air compressor control system and control method thereof | |
| JP2009051660A (en) | Control device of elevator | |
| JP6078750B2 (en) | Suction system | |
| CN210220369U (en) | Refrigerator door | |
| CN106229218A (en) | A kind of single twin coil drive circuit of magnetic latching relay | |
| CN203966981U (en) | A kind of electromagnetic type monostable relay | |
| CN210669933U (en) | Direct current motor drive circuit | |
| CN204035284U (en) | Pipe pressing device and control circuit thereof | |
| CN107918427A (en) | Coil with electronics controls the contactor of system | |
| CN102295205A (en) | Energy-saving elevator system and control method | |
| CN109462280B (en) | Spark-proof intelligent switch and control method thereof | |
| CN204591702U (en) | Intelligence self-priming pump automatic timing control system | |
| CN100524572C (en) | Permanent magnetism type contactor operation device | |
| CN203133526U (en) | Pneumatic switch delay controller | |
| CN111474981B (en) | Make things convenient for magnetic adsorption's house equipment and intelligent terminal | |
| CN219345652U (en) | Bistable two-position three-way electromagnetic valve with improved movable iron core | |
| CN214544161U (en) | Brush direct current motor positive and negative rotation frequency conversion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |