Low-temperature inflator pump control device

Abstract

The utility model provides a low-temperature inflator pump control device which can automatically control an inflator pump to work in a normal state, can be switched to manually control the inflator pump, and comprises a controller, and an air pressure sensor, a relay control module, an emergency starting module and an output module which are connected with the controller, the air pressure sensor is used for collecting the air pressure of target equipment and feeding back the sampled air pressure to the controller; the controller comprises a first pin which is used for outputting a high-level signal RELAY1 according to the sampling air pressure and the preset reference air pressure. The relay control module comprises a first optocoupler switch and a relay; the emergency starting module comprises an emergency switch; the emergency switch is switched between a third pin and a second pin of the relay; the output module comprises a second optocoupler switch, the second optocoupler switch is used for being connected after receiving the high-voltage input signal, and the output end of the second optocoupler switch is connected with the inflator pump.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to a low-temperature air pump control device. Background Art

[0002] The air pump control device in the prior art can automatically collect air pressure and control automatic inflation according to the air pressure. However, the air pump controller in the prior art is mostly used under normal temperature conditions, and rarely works under extremely cold conditions, or the lowest working temperature is only minus 25°C, which cannot meet the needs of users in specific situations. In addition, once the automatic control function of the air pump control device fails, the air pump can no longer be activated, and the inflation needs in some emergency situations cannot be met, which is inconvenient to use. Summary of the invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a low-temperature air pump control device, which can automatically control the operation of the air pump under normal conditions and can switch to manual control of the air pump.

[0004] A low-temperature air pump control device comprises a controller and an air pressure sensor, a relay control module, an emergency start module and an output module connected to the controller;

[0005] The air pressure sensor is used to collect the air pressure of the target device and feed the sampled air pressure back to the controller;

[0006] The controller includes a first pin, which is used to output a high level signal RELAY1 according to the sampled air pressure and a preset reference air pressure;

[0007] The relay control module includes a first optocoupler switch and a relay, wherein an input terminal of the first optocoupler switch is connected to a first pin of the controller, and an output terminal of the first optocoupler switch is connected to the relay, and the first optocoupler switch controls the relay to close and outputs a high voltage RELAY at a second pin of the relay when receiving a high level signal RELAY1 from the controller;

[0008] The emergency start module includes an emergency switch, which switches between the third pin and the second pin of the relay, and is used to control the third pin or the second pin of the relay to access the output module, and the third pin directly inputs a high voltage;

[0009] The output module includes a second optocoupler switch, which is used to be turned on after receiving a high voltage input signal, and the output end of the second optocoupler switch is connected to the air pump.

[0010] Preferably, the emergency switch is connected in series with a temperature switch, and the temperature switch is used to collect the working temperature of the inflation pump and switch the switch state based on the working temperature.

[0011] Preferably, the relay control circuit comprises a status indicator light, and the status indicator light is arranged between two output ends of the second optocoupler switch.

[0012] Preferably, it includes a power supply module, which includes a rectifier and filter circuit. The input end of the rectifier and filter circuit is connected to an AC power supply. The rectifier and filter circuit includes a rectifier, a transformer and a filter capacitor, which are used to convert the input AC power into DC power of a first voltage value.

[0013] Preferably, the power supply module also includes a voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected to the output end of the rectifier and filter circuit, the voltage stabilizing circuit includes a first voltage stabilizer and a second voltage stabilizer connected in sequence, the direct current of a first voltage value passes through the first voltage stabilizer to obtain direct current of a second voltage value, and then passes through the second voltage stabilizer to obtain direct current of a third voltage value.

[0014] Preferably, it comprises an air pressure adjustment switch, which is connected to the controller and is used to adjust the value of the reference air pressure.

[0015] Preferably, the controller comprises a timer, and the timer sets the sampling frequency of the air pressure sensor.

[0016] Preferably, each component in the control device is a low-temperature resistant component.

[0017] The above-mentioned low-temperature air pump control device can provide a high-voltage signal RELAY to the output module through the third pin or the second pin of the relay by switching the state of the emergency switch. When the second pin of the relay is connected, the controller controls the on and off of the relay by comparing the sampled air pressure conditions, thereby realizing automatic control of the air pump operation; when the third pin is connected, the high-voltage signal RELAY is directly connected from the outside, and the start and stop of the air pump can be controlled without the participation of the controller. It can serve as a second guarantee when the low-pressure system fails and cannot be used, thereby ensuring the feasibility of air pump control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the circuit structure of the relay control module;

[0019] Figure 2 It is a schematic diagram of the circuit structure of the emergency start module and the output module;

[0020] Figure 3 Schematic diagram of the circuit structure of the voltage regulator module.

[0021] Reference numerals:

[0022] The first optocoupler switch 11 , the relay 12 , the second pin 121 of the relay, the emergency switch 21 , the third pin 211 , the second optocoupler switch 31 , the temperature switch 32 , the first voltage regulator 41 , and the second voltage regulator 42 . DETAILED DESCRIPTION

[0023] The embodiments of the present utility model are described in detail below.

[0024] This embodiment provides a low-temperature air pump control device, including a controller and an air pressure sensor, a relay control module, an emergency start module and an output module connected to the controller.

[0025] The air pressure sensor is used to collect the air pressure of the target device and feed the sampled air pressure back to the controller. In an embodiment, the sampling frequency of the air pressure sensor is set by a timer.

[0026] The controller includes a first pin, which is used to output a high-level signal RELAY1 according to the sampled air pressure and the preset reference air pressure; in a specific embodiment, a preset reference air pressure is used to compare the sampled air pressure with the preset reference air pressure. If the air pressure of the target device, such as a wheel, is less than the preset reference air pressure, a high-level signal RELAY1 is output, and the air pump is controlled to start inflation through the high-level signal RELAY1. When the sampled air pressure reaches the preset reference air pressure, the controller does not output the high-level signal RELAY1, and the air pump stops inflating. Preferably, it also includes an air pressure adjustment switch, which is connected to the controller and is used to adjust the value of the reference air pressure. In an optional embodiment, multiple working modes and the corresponding preset reference air pressures in each working mode are preset, and the working mode is switched through the air pressure adjustment switch to adjust the value of the reference air pressure. In other optional embodiments, the value of the reference air pressure can also be directly input through the air pressure adjustment switch.

[0027] The relay control module includes a first optocoupler switch 11 and a relay 12. The input terminal of the first optocoupler switch 11 is connected to the first pin of the controller, and the output terminal of the first optocoupler switch 11 is connected to the relay 12. When the first optocoupler switch 11 receives a high level signal RELAY1 from the controller, it controls the relay 12 to close and outputs a high voltage RELAY at the second pin 121 of the relay.

[0028] Automatic control of the start and stop of the air pump. Figure 1As shown, the on and off of the relay 12 is controlled by the first optocoupler switch 11, and the input end of the first optocoupler switch 11 is connected to the first pin of the controller. When the first pin outputs a high-level signal RELAY1, the first optocoupler switch 11 is turned on, and the relay 12 set at its output end is closed, and the high voltage RELAY is output at the second pin 121 of the relay. The output module can control the air pump connected to the output end of the output module to work only when it receives the high voltage RELAY, otherwise the air pump does not work. Thus, the automatic control of the air pump is achieved through the cooperation of the high-level signal RELAY1 and the high voltage RELAY.

[0029] The emergency start module includes an emergency switch 21, which switches between the third pin 211 and the second pin 121 of the relay to control the third pin 211 or the second pin 121 of the relay to access the output module, and the third pin 211 directly inputs a high voltage. Figure 2 As shown, the emergency switch 21 is a button, and by pressing the button, one end of the emergency switch 21 can be switched to the third pin 211, and a high voltage RELAY can be input through the third pin 211, or one end of the emergency switch 21 can be connected to the second pin 121 of the relay, and a high voltage RELAY can be input through the relay 12 control module. Since the high voltage input to the third pin 211 is directly input from the outside and does not rely on the controller, when the controller cannot work normally, switching to the emergency switch 21 connected to the third pin 211 can serve as a second guarantee when the low-voltage system fails and cannot be used, ensuring the feasibility of the air pump control.

[0030] The output module includes a second optical coupler switch 31, which is used to be turned on after receiving a high voltage input signal, and the output end of the second optical coupler switch 31 is connected to the air pump. Figure 2 As shown, in the output module, the high voltage RELAY is connected from the input end of the second optocoupler, and the air pump is connected to the output end of the second optocoupler switch 31. Only after receiving the high voltage input signal, the second optocoupler is turned on and the air pump can start inflation; otherwise, the air pump is disconnected and does not inflate.

[0031] Preferably, the output module includes a temperature switch 32, and the emergency switch 21 is connected in series with the temperature switch 32. The temperature switch 32 is used to collect the working temperature of the air pump and switch the switch state based on the working temperature. The temperature switch 32 controls its own on-off state based on the detection of the working temperature of the air pump and the preset temperature threshold. Since it is connected in series with the emergency switch 21, the second optocoupler switch 31 can only be turned on after the high voltage RELAY is input when the temperature switch 32 is turned on. Therefore, the over-temperature protection of the system can be achieved through the above-mentioned temperature switch 32 to ensure the safety of the low-temperature air pump control device. Taking the preset temperature threshold of 130°C as an example, the air pump will gradually increase its temperature over time during operation, and the temperature switch 32 will monitor in real time. Once the working temperature of the air pump is greater than 130°C, the over-temperature protection system will be activated, and the air pump will be forcibly shut down to achieve a protective effect, providing a safe working environment for the control circuit. In the embodiment, a timer can also be used to set the frequency of the temperature switch 32 detecting the working temperature.

[0032] In this embodiment, each component in the control device is low temperature resistant, so that the operating temperature range is wider and the device can work normally at -40°C to +75°C.

[0033] The low-temperature inflation pump control device also includes a power supply module, which includes a rectifier and filter circuit. The input end of the rectifier and filter circuit is connected to an AC power supply. The rectifier and filter circuit includes a rectifier, a transformer, and a filter capacitor, which are used to convert the input AC power into a DC power of a first voltage value. In this embodiment, the first voltage value is 12V. Since other components such as the controller also require driving voltages of other values, the power supply module in this embodiment also includes a voltage stabilizing circuit. Figure 3 As shown, the input end of the voltage stabilizing circuit is connected to the output end of the rectifier and filter circuit. The voltage stabilizing circuit includes a first voltage stabilizer 41 and a second voltage stabilizer 42 connected in sequence. The DC power of the first voltage value is obtained after passing through the first voltage stabilizer 41 to obtain the second voltage value.

[0034] The DC power of the second voltage value is 5.5V, and the DC power of the third voltage value is obtained after passing through the second voltage stabilizer 42. In this embodiment, the second voltage value is 5.5V, and the third voltage value is 3.3V.

[0035] The low-temperature air pump control device of the above structure can work normally at -40℃~+75℃ by real-time monitoring of the ambient temperature and building a hardware circuit system with low-temperature resistant components, and has a wider working temperature range. There are two ways to start the air pump to choose from, which is more in line with the needs. One is a more intelligent control mode, which presets the air pressure value by pressing two modes to automatically determine whether the current air pressure reaches the current air pressure value to control the start and stop of the air pump. The other is to manually control the start and stop of the air pump through the emergency button. This method is not controlled by the single-chip microcomputer and can be used as a second guarantee when the low-voltage system fails and cannot be used, ensuring the feasibility of the air pump control. In addition, the air pump will gradually increase its temperature over time during operation, and the temperature switch 32 will monitor in real time. Once the operating temperature of the air pump is greater than 130℃, the over-temperature protection system will be activated to forcibly shut down the air pump to achieve the protection effect and provide a safe working environment for the control circuit.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low temperature air pump control device, characterized in that: It includes a controller and an air pressure sensor, a relay control module, an emergency start module and an output module connected to the controller; The air pressure sensor is used to collect the air pressure of the target device and feed the sampled air pressure back to the controller; The controller includes a first pin, which is used to output a high level signal RELAY1 according to the sampled air pressure and a preset reference air pressure; The relay control module includes a first optocoupler switch and a relay, wherein an input terminal of the first optocoupler switch is connected to a first pin of the controller, and an output terminal of the first optocoupler switch is connected to the relay, and the first optocoupler switch controls the relay to close and outputs a high voltage RELAY at a second pin of the relay when receiving a high level signal RELAY1 from the controller; The emergency start module includes an emergency switch, which switches between the third pin and the second pin of the relay, and is used to control the third pin or the second pin of the relay to access the output module, and the third pin directly inputs a high voltage; The output module includes a second optocoupler switch, which is used to be turned on after receiving a high voltage input signal, and the output end of the second optocoupler switch is connected to the air pump.

2. A cryogenic air pump control device according to claim 1, characterized in that: The emergency switch is connected in series with a temperature switch, and the temperature switch is used to collect the working temperature of the inflation pump and switch the switch state based on the working temperature.

3. A cryogenic air pump control device according to claim 1 or 2, characterized in that: The relay control circuit comprises a status indicator light, which is arranged between two output ends of the second optical coupler switch.

4. A cryogenic air pump control device according to claim 1, characterized in that: It includes a power supply module, which includes a rectifier and filter circuit. The input end of the rectifier and filter circuit is connected to an AC power supply. The rectifier and filter circuit includes a rectifier, a transformer and a filter capacitor, which are used to convert the input AC power into DC power of a first voltage value.

5. A cryogenic air pump control device according to claim 4, characterized in that: The power supply module also includes a voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected to the output end of the rectifier and filter circuit, the voltage stabilizing circuit includes a first voltage stabilizer and a second voltage stabilizer connected in sequence, the direct current of a first voltage value is passed through the first voltage stabilizer to obtain direct current of a second voltage value, and then passed through the second voltage stabilizer to obtain direct current of a third voltage value.

6. A cryogenic air pump control device according to claim 1, characterized in that: It includes an air pressure adjustment switch, which is connected to a controller and is used to adjust the value of the reference air pressure.

7. A cryogenic air pump control device according to claim 1, characterized in that: The controller includes a timer that sets a sampling frequency of the air pressure sensor.

8. A cryogenic air pump control device according to any one of claims 1-2 and 4-7, characterized in that: Each component in the control device is a low temperature resistant component.

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