An adaptive circuit for AC 110V and AC 220V

Abstract

This utility model relates to the field of PCR instrument technology, specifically to an adaptive circuit for AC110V and AC220V; it includes a power supply module, first heaters: PS1, PS2, and second heaters: PS3, PS4. The circuit drives the corresponding relays J2, J3, and J1 to operate according to the detection comparison. If the input power is AC110V and the identification signal is high DC24V, relays J2, J3, and J1 do not operate and are in a normally closed state. At this time, PS1, PS2, PS3, and PS4 are all connected in parallel and work normally after the AC110V power supply is turned on. If the input power is AC220V and the identification signal is low DC0V, relays J2, J3, and J1 operate and are in a normally open state. At this time, PS1, PS2, PS3, and PS4 are all connected in series and work normally after the AC220V power supply is turned on. This facilitates the large-scale unified production, sales, and maintenance of the instrument.

Description

Technical Field

[0001] This utility model relates to the field of PCR instrument technology, and in particular to an adaptive circuit for AC110V and AC220V. Background Technology

[0002] In current PCR instrument designs, the sales scope is mostly global. As we all know, the world's power supplies are nothing more than AC110V / 60HZ and AC220V / 50HZ. If the instruments are compatible with these two different power supplies, different instruments must be sent to customers with different power supply standards. This is not conducive to the large-scale unified production, sales and maintenance of the instruments. Utility Model Content

[0003] The purpose of this invention is to provide an adaptive circuit for AC110V and AC220V, which is beneficial for the mass production, sales and maintenance of instruments.

[0004] To achieve the above objectives, this utility model provides an adaptive circuit for AC110V and AC220V, including a power supply module for providing 24V DC power, and also including a first heater: PS1, PS2 and a second heater: PS3, PS4. The two power lines of the AC110V and AC220V adaptive circuit are rectified by D7 and current-limited by R219 to form a current signal, which then enters the light-emitting terminal of the linear optocoupler O27. The output terminal of the linear optocoupler O27 is filtered by E1 to form a voltage signal. This signal is compared with the set voltage of R226 and R227 by U29 to form a high DC24V or low DC0V identification signal. Finally, Q17 drives and controls relays J2, J3 and J1. If the input power supply is AC110V and the identification signal is high DC24V, relays J2, J3 and J1 will not operate and will be in the normally closed state. At this time, PS1, PS2 and PS3, PS4 are all connected in parallel and will work normally after the AC110V power supply is turned on. If the input power supply is AC220V and the identification signal is low DC0V, relays J2, J3 and J1 will operate and be in the normally open state. At this time, PS1, PS2 and PS3, PS4 are all connected in series and will work normally after the AC220V power supply is turned on.

[0005] The power supply L and N ports of the AC110V and AC220V adaptive circuit can be connected to either AC110V or AC220V.

[0006] The power module uses two DC power supplies, DC1 and DC2, with an input voltage of AC85V-AC260V, which can directly apply to two power standards.

[0007] The power of the first heater composed of PS1 and PS2 is greater than the power of the second heater composed of PS3 and PS4.

[0008] In the driving circuits of the first heater and the second heater, three relays J1, J2 and J3 are driven by ACJ to select whether the heaters are connected in series or in parallel.

[0009] This invention relates to an adaptive circuit for AC110V and AC220V. The circuit drives the corresponding relays J2, J3, and J1 to operate based on detection and comparison. If the input power is AC110V and the identification signal is high DC24V, relays J2, J3, and J1 do not operate and are in a normally closed state. At this time, PS1, PS2, PS3, and PS4 are all connected in parallel and work normally after the AC110V power is turned on. If the input power is AC220V and the identification signal is low DC0V, relays J2, J3, and J1 operate and are in a normally open state. At this time, PS1, PS2, PS3, and PS4 are all connected in series and work normally after the AC220V power is turned on. This facilitates the large-scale unified production, sales, and maintenance of the instrument. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0011] Figure 1 This is a schematic diagram of the detection comparison and driving circuit of the adaptive circuit for AC110V and AC220V of this utility model.

[0012] Figure 2 This is a structural schematic diagram of the power module of this utility model.

[0013] Figure 3 This utility model describes the working principle of two drive circuits with different power in the AC110V and AC220V adaptive circuit, where ACJ drives three relays J1, J2, and J3 to select whether the heater is connected in series or in parallel. Detailed Implementation

[0014] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0015] like Figures 1 to 3 As shown, where Figure 1 This is a schematic diagram of the detection and comparison circuit and the drive circuit structure for adaptive circuits for AC110V and AC220V. Figure 2This is a structural diagram of the power module. Figure 3 This invention relates to an adaptive circuit for AC110V and AC220V, comprising two drive circuits with different power ratings. The ACJ drives three relays J1, J2, and J3, selecting whether the heaters are connected in series or parallel. The circuit includes a power module, first heaters PS1 and PS2, and second heaters PS3 and PS4. This design facilitates large-scale, standardized production, sales, and maintenance of the instrument.

[0016] In this embodiment, the power module is used to provide a 24V DC power supply.

[0017] In this circuit, the two power lines of the AC110V and AC220V adaptive circuit are rectified by D7 and current-limited by R219 to form a current signal, which then enters the light-emitting terminal of the linear optocoupler O27. At the output terminal of the linear optocoupler O27, the signal is filtered by E1 to form a voltage signal. This signal is compared with the voltage set by R226 and R227 by U29 to form a high DC24V or low DC0V identification signal. Finally, the signal is driven by Q17 to control relays J2, J3 and J1. The above circuit structure forms a detection comparison circuit and a driving circuit.

[0018] If the input power supply is AC110V and the identification signal is high DC24V, relays J2, J3 and J1 will not operate and will be in the normally closed state. At this time, PS1, PS2 and PS3, PS4 are all connected in parallel and will work normally after the AC110V power supply is turned on. If the input power supply is AC220V and the identification signal is low DC0V, relays J2, J3 and J1 will operate and be in the normally open state. At this time, PS1, PS2 and PS3, PS4 are all connected in series and will work normally after the AC220V power supply is turned on.

[0019] Secondly, the L and N ports of the AC110V and AC220V adaptive circuit can be connected to either AC110V or AC220V. This structure eliminates the need to distinguish between AC110V and AC220V, making the instrument suitable for use in a wide range of regions worldwide.

[0020] Then, the power module uses two DC power supplies, DC1 and DC2, with an input voltage of AC85V-AC260V, which can directly apply to two power standards.

[0021] Furthermore, the power of the first heater composed of PS1 and PS2 is greater than the power of the second heater composed of PS3 and PS4. In practice, the problem lies with the two resistive heaters in the instrument's hot air chamber and hot pressure block. Therefore, these two sets of heaters are divided into two AC110V heaters of equal power, PS1 and PS2, and PS3 and PS4, respectively. The first heater (hot air chamber heater) composed of PS1 and PS2 has a higher power, while the second heater (hot pressure block heater) composed of PS3 and PS4 has a lower power.

[0022] Finally, in the drive circuits of the first heater and the second heater, three relays J1, J2 and J3 are driven by ACJ to select whether the heaters are connected in series or in parallel.

[0023] When using this utility model to facilitate the large-scale unified production, sales, and maintenance of instruments, the two power lines are rectified by D7 and current-limited by R219 to form a current signal, which then enters the light-emitting terminal of the linear optocoupler O27. At the output terminal of the linear optocoupler O27, a voltage signal is formed by filtering by E1. This signal is compared with the set voltage of R226 and R227 via U29 to form a high DC24V or low DC0V identification signal. Finally, Q17 drives and controls relays J2, J3, and J1. At this point, the circuit automatically completes the detection, comparison, and driving actions. If the input power is AC... When the input power is 110V and the identification signal is high DC24V, relays J2, J3, and J1 do not operate and are in the normally closed state. At this time, PS1, PS2, PS3, and PS4 are all connected in parallel and work normally after the AC110V power supply is turned on. If the input power supply is AC220V and the identification signal is low DC0V, relays J2, J3, and J1 operate and are in the normally open state. At this time, PS1, PS2, PS3, and PS4 are all connected in series and work normally after the AC220V power supply is turned on. This facilitates the large-scale unified production, sales, and maintenance of the instrument.

[0024] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. An adaptive circuit for AC110V and AC220V, comprising a power supply module, the power supply module being used to provide a 24V DC power supply, characterized in that, It also includes the first heaters: PS1 and PS2, and the second heaters: PS3 and PS4; The two power lines of the AC110V and AC220V adaptive circuit are rectified by D7 and current-limited by R219 to form a current signal, which then enters the light-emitting terminal of the linear optocoupler O27. The output terminal of the linear optocoupler O27 is filtered by E1 to form a voltage signal. This signal is compared with the set voltage of R226 and R227 by U29 to form a high DC24V or low DC0V identification signal. Finally, Q17 drives and controls relays J2, J3 and J1. If the input power supply is AC110V and the identification signal is high DC24V, relays J2, J3 and J1 will not operate and will be in the normally closed state. At this time, PS1, PS2 and PS3, PS4 are all connected in parallel and will work normally after the AC110V power supply is turned on. If the input power supply is AC220V and the identification signal is low DC0V, relays J2, J3 and J1 will operate and be in the normally open state. At this time, PS1, PS2 and PS3, PS4 are all connected in series and will work normally after the AC220V power supply is turned on.

2. The adaptive circuit for AC110V and AC220V as described in claim 1, characterized in that, The power supply L and N ports of the AC110V and AC220V adaptive circuit can be connected to either AC110V or AC220V.

3. The adaptive circuit for AC110V and AC220V as described in claim 1, characterized in that, The power module uses two DC power supplies, DC1 and DC2, with an input voltage of AC85V-AC260V, which can directly apply to two power standards.

4. The adaptive circuit for AC110V and AC220V as described in claim 1, characterized in that, The power of the first heater composed of PS1 and PS2 is greater than the power of the second heater composed of PS3 and PS4.

5. The adaptive circuit for AC110V and AC220V as described in claim 1, characterized in that, In the drive circuits of the first heater and the second heater, three relays J1, J2 and J3 are driven by ACJ to select whether the heaters are connected in series or in parallel.

Images