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CN-224232121-U - Control circuit of portable synchronous sampler

CN224232121UCN 224232121 UCN224232121 UCN 224232121UCN-224232121-U

Abstract

The utility model discloses a control circuit of a portable synchronous sampler, which comprises a sampling circuit and a power supply circuit forming a loop with the sampling circuit, wherein the sampling circuit comprises a direct-current double-head air pump M for executing sampling, a mode switch K2 for switching automatic or manual sampling, and a time relay normally open contact KT which is communicated with the direct-current double-head air pump M in series in an automatic mode. The utility model has the advantages that firstly, the control circuit is provided with the standby power supply and the charging power supply socket, so that the battery pack can be switched and charged simply in time, and secondly, the circuit of the air pump unit is provided with an automatic mode and a manual mode, so that the synchronism of the air sample sampled by the air processing unit on the project site is effectively improved, and the reliable air sample is provided for project debugging.

Inventors

  • WEI XING
  • WANG JUN
  • YUAN ZHONGYANG
  • ZHOU CHENGXIANG
  • WU SHENGJIAN
  • LAN PENG
  • XU GENHUA

Assignees

  • 浙江爱科乐环保有限公司

Dates

Publication Date
20260512
Application Date
20250815

Claims (10)

  1. 1. A control circuit of a portable synchronous sampler is characterized by comprising a sampling circuit with an automatic or manual mode and a power supply circuit forming a loop with the sampling circuit; The sampling circuit comprises a direct-current double-head air pump M (1) for executing sampling, a mode switch K2 (2) for switching automatic or manual sampling, and a time relay KT coil (3) and a normally open contact KT (4) thereof which are communicated with the direct-current double-head air pump M (1) in series in an automatic mode; The power supply circuit comprises a built-in power supply branch and an external power supply branch which are connected in parallel, wherein the built-in power supply branch is provided with a built-in battery U 0 (5), a normally-closed contact KA1 1 (8), a normally-closed contact KA2 1 (12) and a fuse FU1, and the external power supply branch is provided with an external power supply socket U 1 (6), a normally-open contact KA1 2 (9), a normally-closed contact KA2 3 (13) and the fuse FU2; The direct-current double-head air pump M (1) is directly communicated with the power supply circuit in the automatic or manual sampling mode, and is connected with an external power supply socket U 1 (6) through an external power supply to supply power, so that the intermediate relay coil KA1 (7) is powered, the normally-closed contact KA1 1 (8) is simultaneously disconnected when the normally-open contact KA1 2 (9) is closed, and automatic switching between the built-in battery pack U 0 (5) and the external power supply is completed.
  2. 2. The control circuit of the portable synchronous sampler of claim 1 and comprising a charge control circuit; The charging control circuit comprises a switch W1 (15) arranged between the sampling circuit and the power supply circuit, a first branch (S1) connected in parallel with the external power supply branch, and a second branch (S2) connected in parallel with the built-in power supply branch and then converging into the first branch (S1); The first branch circuit (S1) is provided with a switch W2 (16) which can realize synchronization with the switch W1 (15) during switching, and the second branch circuit (S2) is provided with a normally open contact KA1 4 (10) and a normally open contact KA2 2 (14); the front end of the normally-closed contact KA1 1 (8) is provided with a normally-closed contact KA2 1 (12), and the front end of the normally-open contact KA1 2 (9) is provided with a normally-closed contact KA2 3 (13).
  3. 3. The control circuit of the portable synchronous sampler according to claim 2, wherein in an external power supply state, through the switch W1 (15) and the switch W2 (16) being located at a charging gear, the normally open contact KA1 4 (10) and the normally open contact KA2 2 (14) are both closed, and the normally closed contact KA2 1 (12) and the normally closed contact KA2 3 (13) are both opened; And the second branch (S2) is provided with the normally open contact KA1 4 (10) and the normally open contact KA2 2 (14) to be closed simultaneously, so that the external power supply can charge the built-in battery pack U 0 (5).
  4. 4. The control circuit of the portable synchronous sampler according to claim 1, characterized by comprising an emergency circuit for emergency starting of the direct-current double-head air pump M (1); The emergency circuit is connected in series to the rear of the normally open contact KT (4), is connected in parallel with the direct-current double-head air pump M (1), and comprises an emergency power interface U 2 (17), a fuse FU3 and a self-locking switch SB1 (18).
  5. 5. The control circuit of the portable synchronous sampler of claim 2, comprising a step-down circuit connected in parallel with said power supply circuit; The step-down circuit comprises a self-locking switch SB2 (19), a direct current step-down module DC-DC (20), a fuse FU4 and a +5V output interface OU (21) which are sequentially connected in series.
  6. 6. The portable synchronous sampler control circuit according to claim 5, wherein the self-locking switch SB2 (19) is closed and the +5V output interface OU (21) is capable of supplying +5V power to the outside when the switch W1 (15) and the switch W2 (16) are synchronously in a power supply gear.
  7. 7. The control circuit of the portable synchronous sampler of claim 1, comprising an indication circuit for indicating the overall operation of the control circuit; The indicating circuit comprises an air pump running indicating lamp YL (22), an illuminating lamp L (23), a built-in power supply indicating lamp WL (24) for indicating power supply of an internal power supply, an external power supply indicating lamp RL (25) for indicating the state of an external power supply and a charging indicating lamp GL (26) for indicating the state of charging.
  8. 8. The portable synchronous sampler control circuit according to claim 7, wherein a switch K1 (27) connected in series is arranged on a branch of the illumination lamp L (23).
  9. 9. The control circuit of the portable synchronous sampler according to claim 7, wherein a normally-closed contact KA1 3 (28) and a normally-closed contact KA2 5 (29) which are connected in series are sequentially arranged on a branch of the built-in power supply indicator lamp WL (24).
  10. 10. The control circuit of the portable synchronous sampler of claim 1 wherein an emergency stop mushroom switch JT (30) is arranged on both the built-in power supply branch and the external power supply branch for emergency cutting off power supply.

Description

Control circuit of portable synchronous sampler Technical Field The utility model relates to the technical field of gas sample collection in environmental treatment and detection, in particular to a control circuit of a portable synchronous sampler. Background In the field of environmental treatment air purification engineering, in order to accurately know the purification efficiency of a project processing unit, particularly when project operation parameters are debugged, a great amount of synchronous acquisition is required to be carried out on gas samples at the air inlet and the air outlet of the processing unit. In addition, under the condition that power is not supplied to a project site, the situation that the battery pack of the instrument is always powered off during sampling due to the problem of endurance time often occurs, so that the smooth proceeding of the sampling work is affected. The portable sampler can realize synchronous sampling of gas samples at the inlet and the outlet, and when the power is cut off in the middle, the quick switching between the standby power supply and the original battery pack can be realized by simply using the power socket, and the emergency power supply can be supplied to the air pump and the mobile phone in an emergency state, so that the portable sampler is expected by a scientific research worker. Disclosure of utility model The utility model aims to overcome the defects of the prior art and provides a control circuit of a portable synchronous sampler. The technical scheme is that the control circuit of the portable synchronous sampler comprises a sampling circuit with an automatic or manual mode and a power supply circuit forming a loop with the sampling circuit, wherein the sampling circuit comprises a direct-current double-head air pump M for executing sampling, a mode switch K2 for switching the automatic or manual sampling, a time relay KT coil and a normally open contact KT thereof, the time relay KT coil is connected with the direct-current double-head air pump M in series in the automatic mode, the power supply circuit comprises a built-in power supply branch and an external power supply branch which are connected in parallel, the built-in power supply branch is provided with a built-in battery pack U 0, a normally closed contact KA1 1, a normally closed contact KA2 1 and a fuse FU1, the external power supply branch is provided with an external power supply socket U 1, a normally open contact KA1 2, a normally closed contact KA2 3 and a fuse FU2, the direct-current double-head air pump M is directly connected with the power supply circuit in the automatic or manual sampling mode, the internal power supply branch is connected with an external power supply socket U 1 through an external power supply, and the normally closed contact KA1 is switched off when the internal power supply coil KA1 is connected with the external power supply socket U 0, and the normally open contact is switched with the external power supply pack 35. The charging control circuit comprises a switch W1 arranged between the sampling circuit and the power supply circuit, a first branch connected with the external power supply branch in parallel, and a second branch connected with the built-in power supply branch in parallel and then converging into the first branch, wherein the first branch is provided with a switch W2 which can realize synchronization with the switch W1 during switching, the second branch is provided with a normally open contact KA1 4 and a normally open contact KA2 2, the front end of the normally closed contact KA1 1 is provided with a normally closed contact KA2 1, and the front end of the normally open contact KA1 2 is provided with a normally closed contact KA2 3. Preferably, in the power supply state of the external power supply, the switch W1 and the switch W2 are located at a charging gear, the normally open contact KA1 4 and the normally open contact KA2 2 are both closed, the normally closed contact KA2 1 and the normally closed contact KA2 3 are both opened, and the second branch is provided with the normally open contact KA1 4 and the normally open contact KA2 2 and is simultaneously closed, so that the external power supply charges the built-in battery unit U 0. The emergency circuit is connected in series behind the normally open contact KT, is connected in parallel with the direct-current double-head air pump M, and comprises an emergency power interface U 2, a fuse FU3 and a self-locking switch SB1. The power supply circuit comprises a power supply circuit, and is preferably provided with a voltage reducing circuit which is connected with the power supply circuit in parallel, wherein the voltage reducing circuit comprises a self-locking switch SB2, a direct-current voltage reducing module DC-DC, a fuse FU4 and a +5V output interface OU which are sequentially connected in series. Preferably, when the switch W1 and the switch W2 are synchronously loc