A hand-held gas collection pump
By using a detachable pipe design and a voltage stabilizing circuit module, the problems of unstable power supply and inconvenient connection of the gas sampling pump are solved, realizing stable power supply and flexible connection of the gas sampling pump, which is suitable for gas sampling in different environments.
Patent Information
- Application Number
- CN202521350100.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-06-27
AI Technical Summary
Existing gas sampling pumps suffer from unstable power supply, simple power management module design that makes them susceptible to voltage fluctuations affecting pump performance, and fixed connection methods that make it difficult to quickly replace or adjust pipelines, thus limiting the applicable scenarios for the equipment.
It adopts a detachable pipe design and a voltage regulator circuit module. The voltage regulator circuit module includes a voltage regulator chip HT7830 and a self-locking switch S1. The positive terminal of the battery is connected to the input terminal of the voltage regulator chip U2 through the self-locking switch S1. The output terminal powers the miniature air pump. Resistors R14, R15, and R16 are connected in parallel to stabilize the voltage. The air inlet and outlet are equipped with detachable air inlet and air outlet pipes, respectively, which are suitable for gas collection in different environments.
It achieves stable power supply for the gas sampling pump, avoids the impact of voltage fluctuations on the performance of the micro gas pump, improves the flexibility and maintenance convenience of the equipment, and facilitates connection and use with gas detectors.
Smart Images
Figure CN224681884U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas sampling instrument technology, and in particular to a handheld gas sampling pump. Background Technology
[0002] In the field of gas detection, handheld gas sampling pumps are commonly used devices to deliver the gas to be tested to the detection instrument for analysis. Existing gas sampling pumps typically suffer from the following problems: 1. Unstable power supply: Traditional devices have simple power management modules, making them susceptible to voltage fluctuations that can affect pump performance and lead to inaccurate gas sampling. 2. Inconvenient connection: The fixed connection methods for the inlet and outlet make it difficult to quickly replace or adjust the piping, limiting the applicable scenarios for the equipment. Summary of the Invention
[0003] This utility model addresses the problems of existing technologies by providing a handheld gas sampling pump with a novel structure. The detachable pipe design improves the flexibility and ease of maintenance of the embodiments of this application. The voltage stabilizing circuit module ensures a stable power supply to the micro pump, avoiding the impact of voltage fluctuations on the performance of the micro pump. The parallel resistor design further enhances the stability and reliability of the circuit.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] This utility model provides a handheld gas sampling pump, which includes a housing, an air inlet at one end of the housing, and an air outlet at the other end of the housing. The housing houses a control circuit board, a miniature air pump, and a battery. The air inlet is connected to the air outlet via the miniature air pump. The air inlet is equipped with an air inlet connector, which is detachably connected to an air inlet pipe. The air outlet is equipped with an air outlet connector, which is connected to an air outlet pipe for connection to an external gas detector. A charging port is provided on the housing. The charging port and the battery are electrically connected to the control circuit board. The control circuit board is equipped with a voltage regulator module, which includes a voltage regulator chip U2 and a self-locking switch S1. The positive terminal of the battery is connected to the input terminal of the voltage regulator chip U2 via the self-locking switch S1. The output terminal of the voltage regulator chip U2 is connected to the power supply terminal of the micro air pump. Resistors R14, R15, and R16 are connected between the input and output terminals of the voltage regulator chip U2, and the resistors R14, R15, and R16 are connected in parallel.
[0006] The housing is also equipped with an indicator light LED1, which is connected to the input terminal of the voltage regulator chip U2.
[0007] Preferably, the outer peripheral wall of the air intake connector is provided with an external thread, and the inner wall of one end of the air intake pipe is provided with an internal thread that mates with the external thread.
[0008] Preferably, the other end of the air intake pipe is detachably connected to an air intake sleeve.
[0009] Preferably, the voltage regulator chip U2 is model HT7830.
[0010] Preferably, the air intake pipe is a telescopic pipe.
[0011] The control circuit board also includes a charging circuit module, which comprises a charging chip U1, diodes D1 and D2, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, and R17, a MOSFET Q1, capacitors C1, C2, and C3, a dual-color LED2, and a thermistor NTC1. The charging port is connected to the anode of diode D1, pin 1 of the dual-color LED2, and one end of resistor R10. The cathode of diode D1 is connected to one end of capacitor C1, one end of resistor R2, one end of resistor R4, and the VCC pin of charging chip U1. The other end of resistor R4 is connected to one end of resistor R5, one end of resistor R7, and pin 3 of the dual-color LED2. Resistors R1 and R3 are connected in parallel with resistor R2, and the other ends of resistors R2 and R5 are connected separately. Do not connect the resistor R1 to the source of MOSFET Q1. Connect the drain of MOSFET Q1 to the anode of diode D2. Connect the cathode of diode D2 to the battery and one end of capacitor C2. Connect the other ends of capacitor C1 and C2 to ground. Connect the other end of resistor R7 to the CS2 pin of charging chip U1. Connect the second pin of dual-color LED2 to one end of resistor R8. Connect the other end of resistor R8 to the LED pin of charging chip U1. Connect the other end of resistor R6 to the CS1 pin of charging chip U1. Connect the DRIVE pin of charging chip U1 to the gate of MOSFET Q1. Connect the BAT pin of charging chip U1 to one end of resistor R9. Connect the other end of resistor R9 to the battery. Connect the other end of resistor R10 to one end of resistor R17. Connect the other end of resistor R17 to one end of resistor R12 and the TS pin of charging chip U1. Connect the thermistor NTC1 in parallel with resistor R17. Connect capacitor C3 in parallel with resistor R12. Connect the other end of resistor R12 to ground.
[0012] The beneficial effects of this utility model are:
[0013] This utility model features a novel structure. The gas sampling pump comprises a housing, an inlet, an outlet, a control circuit board, a miniature pump, and a battery. The inlet is connected to the outlet via the miniature pump, forming a gas flow path. The inlet and outlet are equipped with detachable inlet and outlet pipes, respectively. The outlet pipe connects to an external gas detector, enabling efficient gas collection and transmission. This facilitates integration with detection equipment, and the detachable pipe design enhances the flexibility and ease of maintenance. The voltage regulator module includes a voltage regulator chip HT7830 and a self-locking switch S1. The positive terminal of the battery is connected to the voltage regulator chip via the self-locking switch S1. The input terminal of U2 and the output terminal of the voltage regulator chip U2 supply power to the miniature air pump. Resistors R14, R15, and R16 are connected in parallel between the input and output terminals to stabilize the voltage. The battery voltage is regulated to a 3V operating voltage by the voltage regulator chip HT7830 through the self-locking switch S1 to supply power to the miniature air pump. The parallel resistors R14 to R16 are connected between the battery voltage and the miniature air pump to control the air pump current. The voltage regulator circuit module ensures a stable power supply to the miniature air pump, avoiding the impact of voltage fluctuations on the performance of the miniature air pump. The design of the parallel resistors further enhances the stability and reliability of the circuit. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of a handheld gas sampling pump according to the present invention.
[0015] Figure 2 This is an exploded view of the structure of a handheld gas sampling pump according to the present invention.
[0016] Figure 3 This is a circuit diagram of the voltage regulator circuit module of this utility model.
[0017] Figure 4 This is a circuit diagram of the charging circuit module of this utility model.
[0018] exist Figures 1 to 4 The reference numerals in the figures include:
[0019] 1. Housing; 2. Air inlet; 3. Air outlet; 4. Control circuit board; 5. Miniature air pump; 6. Battery; 7. Air inlet connector; 8. Air inlet pipe; 9. Air outlet connector; 10. Air outlet pipe; 11. Charging port; 12. Air inlet sleeve. Detailed Implementation
[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.
[0021] A handheld gas sampling pump, such as Figures 1 to 4The device includes a housing 1, an air inlet 2 located at one end of the housing 1, and an air outlet 3 located at the other end of the housing 1. The housing 1 houses a control circuit board 4, a miniature air pump 5, and a battery 6. The air inlet 2 is connected to the air outlet 3 via the miniature air pump 5. The air inlet 2 is equipped with an air inlet connector 7, which is detachably connected to an air inlet pipe 8. The air outlet 3 is equipped with an air outlet connector 9, which is connected to an air outlet pipe 10 for connection to an external gas detector. The housing 1 has a charging port 11. The charging port 11 and the... Battery 6 is electrically connected to control circuit board 4. Control circuit board 4 is equipped with a voltage regulator module, which includes a voltage regulator chip U2 and a self-locking switch S1. The voltage regulator chip U2 is an HT7830. The positive terminal of battery 6 is connected to the input terminal of voltage regulator chip U2 via the self-locking switch S1. The output terminal of voltage regulator chip U2 is connected to the power supply terminal of miniature air pump 5. Resistors R14, R15, and R16 are connected between the input and output terminals of voltage regulator chip U2, and these resistors are connected in parallel. Specifically, this utility model has a novel structure. The gas collection pump consists of a housing 1, an air inlet 2, an air outlet 3, a control circuit board 4, a miniature air pump 5, and a battery 6. The air inlet 2 is connected to the air outlet 3 via the miniature air pump 5, forming a gas flow path. The air inlet 2 and air outlet 3 are respectively equipped with a detachable air inlet pipe 8 and an air outlet pipe 10. The air outlet pipe 10 is used to connect to an external gas detector, realizing efficient gas collection and transmission, facilitating use with detection equipment. The detachable pipe design improves the flexibility and maintenance convenience of this embodiment. The voltage regulator circuit module includes a voltage regulator chip HT7830 and a self-locking switch S1. The positive terminal of the battery 6 is connected to the input terminal of the voltage regulator chip U2 through the self-locking switch S1. The output terminal of the voltage regulator chip U2 powers the micro air pump 5. The input terminal and output terminal are shown in the image. Resistors R14, R15, and R16 are connected in parallel to stabilize the voltage. The voltage from battery 6 is regulated to a 3V operating voltage by the HT7830 voltage regulator chip via a self-locking switch S1, supplying power to the miniature air pump 5. The parallel resistors R14-R16 are connected between the battery 6 voltage and the miniature air pump 5 to control the air pump current. The voltage regulator circuit module ensures a stable power supply to the miniature air pump 5, avoiding the impact of voltage fluctuations on its performance. The parallel resistor design further enhances the stability and reliability of the circuit.
[0022] In this embodiment, the housing 1 is further provided with an indicator light LED1, which is connected to the input terminal of the voltage regulator chip U2. Specifically, the indicator light LED1 is connected to the input terminal of the voltage regulator chip to display the working status of the circuit; the indicator light LED1 allows for a direct visual determination of whether the device is powered on or working properly, facilitating user operation and troubleshooting.
[0023] In this embodiment, the outer peripheral wall of the air inlet connector 7 is provided with an external thread, and the inner wall of one end of the air inlet pipe 8 is provided with an internal thread that mates with the external thread. Specifically, the outer peripheral wall of the air inlet connector 7 is provided with an external thread, and the inner wall of one end of the air inlet pipe 8 is provided with a matching internal thread, thereby achieving a detachable connection; wherein, the other end of the air inlet pipe 8 is detachably connected to an air inlet sleeve 12, and the air inlet sleeve 12 is easily replaceable through a detachable connection (e.g., threaded connection), and the air inlet sleeve 12 can be replaced according to the sampling requirements in different environments.
[0024] In this embodiment, the air inlet pipe 8 is a telescopic pipe. Specifically, the air inlet pipe 8 is designed as a telescopic pipe, and its length can be adjusted as needed. The telescopic design enhances the portability and adaptability of the device, making it suitable for gas collection scenarios at different distances and allowing for flexible use.
[0025] In this embodiment, the control circuit board 4 is further provided with a charging circuit module. The charging circuit module includes a charging chip U1, diodes D1 and D2, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, and R17, a MOSFET Q1, capacitors C1, C2, and C3, a dual-color LED 2, and a thermistor NTC1. The charging port 11 is connected to... The anode of diode D1 is connected to pin 1 of the dual-color LED2 and one end of resistor R10. The cathode of diode D1 is connected to one end of capacitor C1, one end of resistor R2, one end of resistor R4, and the VCC pin of charging chip U1. The other end of resistor R4 is connected to one end of resistor R5, one end of resistor R7, and pin 3 of the dual-color LED2. Resistors R1 and R3 are connected in parallel with resistor R2. The other ends of resistors R2 and R5 are connected to the MOSFET. The source of Q1 is connected; the drain of MOSFET Q1 is connected to the anode of diode D2; the cathode of diode D2 is connected to battery 6 and one end of capacitor C2; the other ends of capacitor C1 and capacitor C2 are grounded respectively; the other end of resistor R7 is connected to the CS2 pin of charging chip U1; the second pin of dual-color LED2 is connected to one end of resistor R8; the other end of resistor R8 is connected to the LED pin of charging chip U1; the other end of resistor R6 is connected to the CS1 pin of charging chip U1; the DRIVE pin of charging chip U1 is connected to the gate of MOSFET Q1; the BAT pin of charging chip U1 is connected to one end of resistor R9; the other end of resistor R9 is connected to battery 6; the other end of resistor R10 is connected to one end of resistor R17; the other end of resistor R17 is connected to one end of resistor R12 and the TS pin of charging chip U1; the thermistor NTC1 is connected in parallel with resistor R17; capacitor C3 is connected in parallel with resistor R12; the other end of resistor R12 is grounded; charging port 11 is a type-C charging port.
[0026] Specifically, this embodiment can be powered by a 3.7V lithium battery 6. The lithium battery 6 is charged using a type-C charging port 11. For the charging section, the power supply voltage is input to the charging chip U1 through diode D1. Resistor R6 can be used to adjust and control the pre-charge current. The parallel connection of resistors R1, R2, and R3 is used to control a constant charging current. The gate G of MOSFET Q1 is connected to the DRIVE pin of the charging chip U1 to control the charging process. When MOSFET Q1 is turned on, the charging current flows from the power supply to diode D1 and through the parallel resistors R1~R 3. After passing through diode D2, the current flows into battery 6 for charging. The power supply voltage is connected to pin 1 of the dual-color LED2. When battery 6 is charging, the LED pin of charging chip U1 is at a low potential, the diode is conducting, and the red light illuminates to indicate that charging is in progress. Pin 3 of LED2 is connected to CS2 / LED of charging chip U1. When fully charged, it is at a low potential, and the green light illuminates to indicate that it is fully charged. In addition, voltage divider resistors such as resistors R10, R11, thermistor NTC1, and R12 can be used to detect the temperature of battery 6, monitor the temperature of battery 6, and ensure charging safety.
[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.
Claims
1. A handheld gas sampling pump, characterized in that: The device includes a housing, an air inlet at one end of the housing, and an air outlet at the other end of the housing. The housing houses a control circuit board, a miniature air pump, and a battery. The air inlet is connected to the air outlet via the miniature air pump. The air inlet is equipped with an air inlet connector, which is detachably connected to an air inlet pipe. The air outlet is equipped with an air outlet connector, which is connected to an air outlet pipe for connection to an external gas detector. A charging port is provided on the housing, and the charging port and the battery are respectively... The battery is electrically connected to the control circuit board, which is equipped with a voltage regulator circuit module. The voltage regulator circuit module includes a voltage regulator chip U2 and a self-locking switch S1. The positive terminal of the battery is connected to the input terminal of the voltage regulator chip U2 via the self-locking switch S1. The output terminal of the voltage regulator chip U2 is connected to the power supply terminal of the micro air pump. Resistors R14, R15, and R16 are connected between the input and output terminals of the voltage regulator chip U2, and the resistors R14, R15, and R16 are connected in parallel.
2. The handheld gas sampling pump according to claim 1, characterized in that: The housing is also provided with an indicator light LED1, which is connected to the input terminal of the voltage regulator chip U2.
3. A handheld gas sampling pump according to claim 1, characterized in that: The outer peripheral wall of the air intake connector is provided with an external thread, and the inner wall of one end of the air intake pipe is provided with an internal thread that mates with the external thread.
4. A handheld gas sampling pump according to claim 1, characterized in that: The other end of the air intake pipe is detachably connected to an air intake sleeve.
5. A handheld gas sampling pump according to claim 1, characterized in that: The voltage regulator chip U2 is model HT7830.
6. A handheld gas sampling pump according to claim 1, characterized in that: The air intake pipe is a telescopic pipe.
7. A handheld gas sampling pump according to claim 1, characterized in that: The control circuit board also includes a charging circuit module, which comprises a charging chip U1, diodes D1 and D2, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, and R17, a MOSFET Q1, capacitors C1, C2, and C3, a dual-color LED2, and a thermistor NTC1. The charging port is connected to the anode of diode D1, pin 1 of the dual-color LED2, and one end of resistor R10. The cathode of diode D1 is connected to one end of capacitor C1, one end of resistor R2, one end of resistor R4, and the VCC pin of charging chip U1. The other end of resistor R4 is connected to one end of resistor R5, one end of resistor R7, and pin 3 of the dual-color LED2. Resistors R1 and R3 are connected in parallel with resistor R2, and the other ends of resistors R2 and R5 are connected in parallel with resistor R3. The resistor R7 is connected to the source of MOSFET Q1, the drain of MOSFET Q1 is connected to the anode of diode D2, the cathode of diode D2 is connected to the battery and one end of capacitor C2, the other ends of capacitor C1 and capacitor C2 are grounded, the other end of resistor R7 is connected to the CS2 pin of charging chip U1, the second pin of dual-color LED2 is connected to one end of resistor R8, the other end of resistor R8 is connected to the LED pin of charging chip U1, the other end of resistor R6 is connected to the CS1 pin of charging chip U1, the DRIVE pin of charging chip U1 is connected to the gate of MOSFET Q1, the BAT pin of charging chip U1 is connected to one end of resistor R9, the other end of resistor R9 is connected to the battery, the other end of resistor R10 is connected to one end of resistor R17, the other end of resistor R17 is connected to one end of resistor R12 and the TS pin of charging chip U1, the thermistor NTC1 is connected in parallel with resistor R17, capacitor C3 is connected in parallel with resistor R12, and the other end of resistor R12 is grounded.