CN102538335B - Movable refrigerator with electric power system and control method thereof - Google Patents

Abstract

The invention discloses a mobile freezer with an electric booster system. The mobile freezer includes a complete freezer and an electric booster system. The electric booster system includes a control panel, a sensing handle, a governor, and a motor drive actuator, wherein the control panel 1. The sensing handle is set on the push rod on the side of the freezer, and the motor drive actuator and governor are set at the bottom of the freezer; the sensing handle is set on both sides of the control panel and connected to each other. The control panel and the sensing handle are both The speed governor is connected, and the speed governor is connected to the motor drive actuator; and a sensor is arranged in the sensing handle, and the sensor senses the magnitude of the thrust applied on the sensing handle. By setting the electric power assist system at the bottom of the complete freezer, the complete freezer can be transported under the drive of the motor, and the size of the thrust can be felt by sensing the handle, and the size of the output power can be automatically adjusted, so that the complete freezer can be used on complex roads. drive on.

Description

Mobile refrigerator with electric power assist system and control method thereof

technical field

The invention relates to the technical field of refrigerators, in particular to a mobile refrigerator with an electric power assist system.

Background technique

When commonly used refrigeration equipment (freezers) are sold outdoors, the product needs to be moved at any time due to changes in the sales location. However, the refrigeration equipment is heavy when fully loaded, and it is inconvenient to move, and it is time-consuming and laborious to move.

In order to solve the problem of inconvenient transportation of commercial refrigeration equipment (refrigerators) outdoors, some refrigerators have self-made transport vehicles. However, due to the difficulty of manpower pushing and pulling the self-made transport vehicles, and there are potential safety hazards, it cannot solve the transportation problem of commercial refrigerators well.

Chinese patent document CN 2446472Y discloses "solar mobile freezer", which includes a complete freezer, a solar panel, an energy storage device, a connecting bracket, a freezer moving device and a control circuit, and is characterized in that the freezer moving device is a wheeled The refrigerator transport vehicle, the complete refrigerator and the energy storage device are respectively placed on the base of the transport vehicle, the solar panel is connected to the base of the refrigerator transport vehicle through the connecting bracket, and the power plug of the refrigerator compressor is inserted into the power socket of the energy storage device. Its refrigerated box body is compact in structure, easy to carry, move, and use. The energy storage device can also conveniently supply power to other electrical appliances, and has a wide range of uses. However, the structure of this solar mobile refrigerator is complicated, resulting in high manufacturing costs. The start of the refrigerator is only controlled by the control circuit, and its speed cannot be adjusted well, which may easily lead to the problem that the power boost is too large and cannot be controlled by people, or the power boost is too small to push the refrigerator.

Contents of the invention

The purpose of the present invention is to solve the above problems and provide a mobile refrigerator with an electric power assist system, which has the advantages of simple structure, low manufacturing cost, high automatic adjustment ability of power assist, meeting the needs of various road conditions and saving energy. advantage.

For reaching this purpose, the present invention adopts following technical scheme:

A mobile freezer with an electric booster system, the mobile freezer includes a complete freezer and an electric booster system, the electric booster system includes a control panel, a sensing handle, a governor, and a motor drive actuator, wherein the control panel . The sensing handle is set on the push rod on the side of the complete freezer, the motor drive actuator is set at the bottom of the complete freezer, and the governor is set at the bottom of the complete freezer;

The control panel and the sensing handle are arranged on the push rod, the sensing handles are arranged on both sides of the control panel and connected to each other, the control panel and the sensing handle are both connected to the governor, so The governor is connected to the motor drive actuator;

And a sensor is set in the sensing handle, and the sensor senses the magnitude of the thrust applied to the sensing handle;

The control panel is provided with at least three buttons respectively used to control the power switch of the booster system, the numerical input mode switch of the booster system, and the sensor handle mode switch of the booster system.

Further, the motor transmission actuator includes wheels, and a motor that drives the wheels to run, and the motor is connected to the governor through wiring.

Preferably, a sensor is provided at one end of the sensing handle, so that the whole freezer can move in one direction.

More preferably, both ends of the sensing handle are provided with sensors, and the two sensors are respectively arranged on the side facing away from and facing the complete freezer, where the sensor set on the side facing away from the complete freezer The signal detected by the Hall device is a forward signal, and the signal detected by the Hall device in the sensor installed on the side facing the complete freezer is a backward signal, which can make the complete freezer move in two directions and move forward You can also go back.

Further, the sensor includes a pressure switch, a magnet, a spring and a Hall device, the first end of the magnet is connected to the pressure switch, the second end is connected to the spring, and the Hall device is arranged near the second end of the magnet so that the magnet is always within the sensing range of the Hall device, one side of the Hall device is connected to the governor through wiring, and the relative positions of the magnet and the Hall device are different, resulting in different magnetic signal, the Hall device converts different magnetic signals into resistance signals and transmits them to the governor. The sensor here adopts the above-mentioned structure, which can adjust the size of the power assist more autonomously, and because the Hall device has no contact with the magnet and the spring, the service life of the Hall device is extended, and the Hall device after long-term use can also maintain Higher precision.

Preferably, the governor is an MCU intelligent governor.

A control method for a mobile freezer with an electric power assist system. According to different road conditions, the manual mode or the power assist mode is selected. When the manual mode is selected, the power switch on the control panel is turned off. At this time, manual push and pull work is used; when the manual mode is selected In the booster mode, turn on the power switch on the control panel to perform the booster push-pull work, and the booster mode is divided into two types, one is the numerical input mode, that is, the booster value is directly input on the control panel, and the numerical input needs to be turned on at this time button, and turn off the sensing handle button at the same time; the other is the sensing handle mode, that is, the sensing handle directly senses the magnitude of the assist. At this time, you need to turn on the sensing handle button and turn off the value input button.

When using the sensing handle mode in the assist mode, turn on the power switch, then turn on the sensing handle button, and turn off the value input button at the same time, by applying force to the sensing handle, the pressure switch of the sensor inside the sensing handle is turned on, and the force Act on the magnet, make the magnet close to the Hall device, transmit different signals to the Hall device, the Hall device generates different Hall signals, and transmit the Hall signal to the governor, and then the governor to the governor The motor actuator performs push-pull work.

When using the value input mode in the power assist mode, turn on the power switch, then turn on the value input button, and at the same time turn off the sensing handle button, input the predetermined value, the control panel will send the value signal to the governor, and then the governor will Pass it to the motor actuator for push-pull work.

The beneficial effects of the present invention are: by setting the electric power assist system at the bottom of the complete freezer, the complete freezer can be transported under the drive of the motor, and the magnitude of the thrust can be felt by sensing the handle, and the size of the output assist can be adjusted by itself, so that People can better control, and the whole freezer can be driven forward, backward, climbing, etc. on complex roads, thus solving the problem of inconvenient transportation of commercial refrigeration equipment (refrigerators) outdoors; by setting multiple Different buttons can realize a variety of control methods, such as directly inputting the value of the required power boost to the control panel, or controlling the power boost through the sensory handle, or directly relying on human push and pull, etc. Different methods adapt to different road conditions. For example, manpower is used on relatively flat roads to save electric energy. Compared with the prior art, this freezer has the advantages of simple structure, low manufacturing cost, high automatic adjustment ability of power assistance, meeting the needs of various road conditions, and saving energy.

Description of drawings

Fig. 1 is a schematic structural view of the mobile refrigerator with the electric power assist system described in Embodiment 1;

Fig. 2 is a working flowchart of the electric power assist system shown in Fig. 1;

Fig. 3 is a structural schematic diagram of the sensor shown in Fig. 1;

Fig. 4 is a schematic structural view of the mobile refrigerator with the electric power assist system described in the second embodiment;

Fig. 5 is a working flowchart of the electric power assist system shown in Fig. 4;

FIG. 6 is a working flow chart of the sensing handle mode of the assisting mode in FIG. 5 .

In Figures 1 to 3:

1. The complete freezer; 11. Push rod; 2. Electric power assist system;

3. Control panel; 31. Power switch; 32. Value input button; 33. Sensing handle button;

4. Sensing handle; 5. Governor; 6. Motor drive actuator;

7. Sensor; 71. Pressure switch; 72. Magnet; 73. Spring; 74. Hall device;

In Figure 4-5:

8. Complete freezer; 81. Push rod; 9. Electric power assist system;

10. Control panel; 101. Power switch; 102. Value input button; 103. Sensing handle button; 104. Forward button; 105. Backward button;

11. Sensing handle; 12. Governor; 13. Motor drive actuator;

14. Forward sensor; 15. Reverse sensor.

Detailed ways

Embodiment 1, as shown in Figures 1 to 3, in this embodiment, a mobile refrigerator with an electric power assist system according to the present invention, the mobile refrigerator includes a complete refrigerator 1 and an electric power assist system 2, and the electric power assist system 2 The power assist system 2 includes a control panel 3, a sensing handle 4, a governor 5, and a motor transmission actuator 6, wherein the control panel 3 and the sensing handle 4 are arranged on the push rod 11 on the side of the complete freezer 1, and the motor transmission actuator 6 It is arranged at the bottom of the complete freezer 1, and the governor 5 is arranged at the bottom of the complete freezer 1;

The control panel 3 and the sensing handle 4 are arranged on the push rod 11, the sensing handle 4 is arranged on both sides of the control panel 3 and connected to each other, the control panel 3 and the sensing handle 4 are connected to the governor 5, and the governor 5 is connected to the motor Transmission actuator 6;

And a sensor 7 is arranged in the sensing handle 4, and the magnitude of the thrust applied on the sensing handle 4 is sensed by the sensor 7;

The buttons provided on the control panel 3 include a power switch 31 , a value input button 32 and a sensory handle button 33 .

Sensor 7 is arranged in sensing handle 4, and sensor 7 comprises pressure switch 71, magnet 72, spring 73, Hall device 74, and pressure switch 71 is installed on the first end of magnet 72, and can be installed on the second end of magnet 72. The spring 73 that resets the magnet 72 is installed with a Hall device 74 near the second end of the magnet 72. The Hall device 74 is not in contact with the magnet 72 and the spring 73, and the magnet 72 is always located in the sensing range of the Hall device 74. Inside, the relative positions of the magnet 72 and the Hall device 74 are different to generate different magnetic signals, and the Hall device 74 converts the different magnetic signals into resistance signals and transmits them to the governor 5 .

The motor transmission actuator 6 includes a wheel and a motor provided on the wheel to provide rotational power, and a gearbox is arranged between the rotation shaft of the wheel and the output shaft of the motor to achieve the purpose of the wheel rotating under the drive of the motor.

In this embodiment, the speed governor 5 adopts an MCU intelligent speed governor. When only a simple forward movement is required to work, only the sensor 7 is set at the right end inside the handle 4, and a set of sensors 7 are set at the bottom front end of the refrigerator complete machine 1. The wheels of the motor and the gear box, and the rear end of the bottom of the freezer complete machine 1 (near the end of the sensing handle) are directly provided with a motor drive actuator 6 .

When working, choose different operation modes according to different road conditions or needs:

When the road conditions are relatively flat, the manual mode can be selected, and at this time, the power switch 31 on the control panel 3 is turned off, and the push-pull work is manually performed;

In more complex road conditions, you can choose the booster mode. At this time, turn on the power switch 31 on the control panel 3 to perform the booster work. The booster mode is divided into two types. One is the numerical input mode, that is, the booster value is directly input to the On the control panel 3, you need to turn on the numerical input button 32 and turn off the sensing handle button 33 at this time; the other is the sensing handle mode, that is, the sensing handle 4 directly senses the power assistance. At this time, you need to turn on the sensing handle button 33 and turn off the numerical value at the same time. Enter button 32 .

When adopting the sensing handle mode in the booster mode, turn on the power switch 31, then turn on the sensing handle button 33, and turn off the value input button 32 at the same time. At this time, by applying force to the sensing handle 4, the sensor 7 inside the sensing handle 4 The pressure switch 71 is turned on, and the active force acts on the magnet 72, so that the magnet 72 is close to the Hall device 74, and different signals are transmitted to the Hall device 74, and the Hall device 74 generates different Hall signals, and transmits the Hall signals to the Hall device 74. To the governor 5, and then passed to the motor actuator 6 by the governor 5 to promote the work.

When using the numerical input mode in the booster mode, turn on the power switch 31, then turn on the numerical input button 32, and turn off the sensing handle button 33 at the same time, input a predetermined numerical value, and the control panel 3 will send the numerical signal to the intelligent governor 5 , and then transmitted by the governor 5 to the motor actuator 6 to push the work.

Embodiment 2, as shown in Figures 4 to 5, in this embodiment, a mobile freezer with an electric power assist system according to the present invention, the mobile freezer includes a complete freezer 8 and an electric power assist system 9, the electric power The booster system 9 includes a control panel 10, a sensing handle 11, a governor 12 and a motor transmission actuator 13, wherein the control panel 10 and the sensing handle 11 are arranged on the push rod 81 on the side of the refrigerator complete machine 8, and the motor transmission actuator 13 It is arranged at the bottom of the complete freezer 8, and the governor 12 is arranged at the bottom of the complete freezer 8;

The control panel 10 and the sensing handle 11 are arranged on the push rod 81. The sensing handle 11 is arranged on both sides of the control panel 10 and connected to each other. The control panel 10 and the sensing handle 11 are connected to the governor 12, and the governor 12 is connected to the motor Transmission actuator 13;

And a sensor 14 is arranged in the sensing handle 11, and the magnitude of the thrust applied to the sensing handle 11 is sensed by the sensor 14;

The buttons provided on the control panel 10 include a power switch 101 , a value input button 102 , a sensor handle button 103 , a forward button 104 and a backward button 105 .

A forward sensor 14 is arranged at the inner right end of the sensing handle 11, a backward sensor 15 is arranged at the left end of the sensing handle 11, and the forward sensor 14 is arranged on the side facing away from the complete freezer 8, and the backward sensor 15 is installed on the side facing the complete freezer 8 The forward sensor 14 and the backward sensor 15 are structurally consistent with the sensor 7 in the first embodiment, but the signal detected by the Hall device in the forward sensor 14 is a forward signal, and the signal detected by the Hall device in the backward sensor 15 is Retreat signal, forward signal passes in the motor transmission actuator 13, can make the output shaft of the motor rotate in the forward direction, and retreat signal passes in the motor transmission actuator 13, can make the output shaft of the motor rotate in the reverse direction.

The motor transmission actuator 13 includes a wheel and a motor provided on the wheel to provide rotational power, and a gearbox is arranged between the rotation shaft of the wheel and the output shaft of the motor to achieve the purpose of the wheel rotating under the drive of the motor.

In this embodiment, the speed governor 12 adopts an MCU intelligent speed governor. The complete freezer 8 needs to move forward, and it needs to move backward. At this time, the right end of the sensing handle 11 is provided with a forward sensor 14, and the left end of the sensing handle 11 is provided with a backward movement. Sensor 15, and the bottom front end of freezer complete machine 8 is provided with a group of wheels without motor and gear box, and the rear end of freezer complete machine 8 bottom (near the perception handle end) is then directly provided with motor drive actuator 13.

When working, choose different operation modes according to different road conditions or needs:

When the road conditions are relatively smooth, the manual mode can be selected, and at this time, the power switch 101 on the control panel 10 is turned off, and the push-pull work is manually performed;

When more complicated road condition, can select booster mode, open the power switch 31 on the control panel 10 at this moment, carry out booster work.

When the freezer complete machine 8 needs to move forward, turn on the forward button 104 and turn off the back button 105 at the same time. At this time, the assist mode is divided into two types. One is a numerical input mode, that is, the assist value is directly input on the control panel 10. The numerical input button 102 needs to be turned on, and the sensing handle button 103 should be turned off at the same time; the other is the sensing handle mode, that is, the sensing handle 11 directly senses the magnitude of the booster. At this time, the sensing handle button 103 needs to be turned on, and the numerical input button 102 should be turned off at the same time;

When the sensing handle mode in the booster mode is adopted, the sensing handle button 103 is turned on, and the value input button 102 is closed at the same time. At this time, by applying a forward thrust to the sensing handle 11, the pressure switch of the forward sensor 14 at the right end inside the sensing handle 11 is sensed. Turn on, the force acts on the magnet, so that the magnet is close to the Hall device, and different signals are transmitted to the Hall device, and the Hall device generates different Hall signals. At this time, the Hall device transmits the forward signal, and will The Hall signal is transmitted to the governor 12, and then transmitted to the motor actuator 13 by the governor 12, and when the motor in the motor actuator 13 receives the forward signal, the output shaft of the motor rotates forward, and the output of the motor The shaft transmits the positive signal to the rotating shaft of the wheel through the gear box, so that the wheel rotates forward, and the refrigerator complete machine 8 moves forward under the action of electric power assist.

When using the numerical input mode in the booster mode, turn on the numerical input button 102, and close the sensing handle button 103 at the same time, input a predetermined numerical value, and the control panel 10 will pass the numerical signal to the governor 12, and the signal at this time is forward The signal is transmitted to the motor actuator 13 by the governor 12, and when the motor in the motor actuator 13 receives the forward signal, the output shaft of the motor rotates in the forward direction, and at the same time, the output shaft of the motor transmits the forward signal through the gear box The rotation shaft passed to the wheel makes the wheel rotate forward, and the complete freezer 8 moves forward under the action of electric power assist.

When the freezer complete machine 8 needs to go backward, turn on the back button 105 and turn off the forward button 104 at the same time. The assist mode at this time is divided into two types. One is the numerical input mode, that is, the assist value is directly input on the control panel 10. The numerical input button 102 needs to be turned on, and the sensing handle button 103 should be turned off at the same time; the other is the sensing handle mode, that is, the sensing handle 11 directly senses the magnitude of the booster. At this time, the sensing handle button 103 needs to be turned on, and the numerical input button 102 should be turned off at the same time;

When the sensing handle mode in the assist mode is adopted, the sensing handle button 103 is turned on, and the value input button 102 is turned off at the same time. At this time, by applying a pulling force to the sensing handle 11, the pressure switch of the backward sensor 15 at the left end of the sensing handle 11 is sensed. Turn on, the force acts on the magnet, make the magnet close to the Hall device, and transmit different signals to the Hall device, and the Hall device generates different Hall signals. At this time, the Hall device generates a retreat signal, and the Hall The signal is transmitted to the governor 12, and then transmitted to the motor actuator 13 by the governor 12, and when the motor in the motor actuator 13 receives the backward signal, the output shaft of the motor rotates in the opposite direction, and at the same time the output shaft of the motor will The reverse signal is sent to the rotating shaft of the wheel through the gear box, so that the wheel rotates in the opposite direction, and the complete freezer 8 moves backward under the action of electric power assist.

When the value input mode in the assist mode is adopted, the value input button 102 is turned on, and the sensing handle button 103 is turned off at the same time, and a predetermined value is input, and the control panel 10 transmits the value signal to the governor 12, and the signal at this time is backward The signal is transmitted to the motor actuator 13 by the governor 12, and when the motor in the motor actuator 13 receives the backward signal, the output shaft of the motor rotates in the reverse direction, and at the same time, the output shaft of the motor passes the reverse signal through the gear box Pass to the rotating shaft of wheel, make wheel reverse rotation, make freezer complete machine 8 move backward under the effect of electric power assist.

As shown in Figure 6, the sensing handle mode in the power assist mode is mainly to control the forward motion state and backward motion state of the whole freezer through the sensing handle. The core of the sensing handle mainly consists of two parts: 1. Push or pull switch, namely Sensing the sensors of different directions set in the handle, the sensor set on the side facing the complete freezer is a tension sensor, and the sensor set on the side facing away from the complete freezer is a thrust sensor; produce different currents).

By sensing the handle, the received pulling force or thrust is converted into a current signal on the Hall device, and the current signal is converted into a digital signal through the A/D conversion on the MCU intelligent governor, and is calculated by the controller of the MCU intelligent governor Turn digital signal output processing into the ultimate driving force. The greater the push or pull force, the greater the output drive boost. For example, when going uphill, the sensing handle senses the thrust and selects the thrust assist output. The steeper the slope, the greater the force to push the refrigerator car, the greater the output current signal generated by the sensing handle, and the greater the output driving force.

The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative efforts, and these modes will all fall within the protection scope of the present invention.

Claims (11)

1. A mobile refrigerator with an electric booster system, characterized in that the mobile freezer includes a complete freezer and an electric booster system, and the electric booster system includes a control panel, a sensing handle, a governor, and a motor drive actuator , wherein the control panel and the sensing handle are set on the push rod on the side of the complete freezer, the motor drive actuator is set at the bottom of the complete freezer, and the governor is set on the complete freezer the bottom of the machine; The control panel and the sensing handle are arranged on the push rod, the sensing handles are arranged on both sides of the control panel and connected to each other, the control panel and the sensing handle are both connected to the governor, so The governor is connected to the motor drive actuator; And a sensor is arranged in the sensing handle, and the magnitude of the thrust applied to the sensing handle is sensed by the sensor. 2. The mobile freezer with an electric power assist system according to claim 1, wherein at least three power switches for controlling the power assist system, a value input mode switch for the assist system, and a power assist system are set on the control panel. The button that senses the handle mode switch. 3. The mobile refrigerator with an electric power assist system according to claim 1, wherein the motor drive actuator includes wheels, and a motor that drives the wheels to run, and the speed of the motor is adjusted by wiring device. 4. The mobile refrigerator with an electric power assist system according to claim 1, wherein a sensor is provided at one end of the sensing handle. 5. The mobile refrigerator with an electric power assist system according to claim 1, characterized in that sensors are provided at both ends of the sensing handle, and the two sensors are respectively arranged on the back-to-back and facing refrigerator complete machines side. 6. The mobile refrigerator with an electric power assist system according to any one of claims 1, 4 or 5, wherein the sensor includes a pressure switch, a magnet, a spring and a Hall device, the first of the magnet One end is connected to a pressure switch, and the second end is connected to a spring. The Hall device is arranged at the second end close to the magnet so that the magnet is always within the sensing range of the Hall device. One side of the Hall device is wired Connected to the speed controller, the relative position of the magnet and the Hall device is different, and different magnetic signals are generated, and the Hall device converts the different magnetic signals into resistance signals and transmits them to the speed controller. device. 7. The mobile refrigerator with electric power assist system according to claim 1 or 3, characterized in that, the governor is an MCU intelligent governor. 8. The mobile refrigerator with electric power assist system according to claim 6, characterized in that, the governor is an MCU intelligent governor. 9. A control method for a mobile refrigerator with an electric power assist system according to any one of claims 1 to 8, characterized in that the manual mode or the power assist mode is selected according to different road conditions, and when the manual mode is selected, the The power switch on the control panel is used to push and pull manually at this time; when the assist mode is selected, turn on the power switch on the control panel to perform push and pull work, and the assist mode is divided into two types, one is the numerical input mode , that is, the power assist value is directly input on the control panel. At this time, the value input button needs to be turned on, and the sensing handle button should be turned off at the same time; the other is the sensing handle mode, that is, the sensing handle directly senses the power boost. Turn off the numeric entry button. 10. The control method of a mobile refrigerator with an electric power assist system according to claim 9, wherein when the sensing handle mode in the assisting mode is adopted, the power switch is turned on, and then the sensing handle button is turned on, and at the same time, the sensing handle button is turned off Numerical input button, at this time, by applying force to the sensing handle, the pressure switch of the sensor inside the sensing handle is turned on, and the force acts on the magnet, making the magnet close to the Hall device, and transmitting different signals to the Hall device. The device generates different Hall signals, and transmits the Hall signals to the governor, and then the governor transmits them to the motor actuator for push-pull work. 11. The control method of a mobile refrigerator with an electric power assist system according to claim 9, wherein when the value input mode in the power assist mode is adopted, the power switch is turned on, and then the value input button is turned on, and at the same time, the value input button is turned off Sensing the handle button, input the predetermined value, the control panel will transmit the value signal to the governor, and then the governor will transmit the signal to the motor actuator for push-pull work.