A TDS monitor and control circuit thereof

Abstract

This utility model discloses a TDS monitor and its control circuit. The TDS monitor includes a TDS measurement module capable of outputting TDS values; it includes a power supply, a control chip, a first LED, a second LED, a third LED, a first resistor, a second resistor, and a third resistor; the control chip has a TDS input pin, a first indicator pin, a second indicator pin, and a third indicator pin; the data output terminal of the TDS measurement module is electrically connected to the TDS input pin of the control chip; the first indicator pin is electrically connected to the power supply via the first LED and the first resistor; the second indicator pin is electrically connected to the power supply via the second LED and the second resistor; the third indicator pin is electrically connected to the power supply via the third LED and the third resistor; the control chip adjusts the output voltage of the first, second, and third indicator pins respectively based on the input data from the TDS input pin. This utility model can display the TDS detection results in segments, enabling a quick and intuitive understanding of the TDS value of drinking water.

Description

Technical Field

[0001] This utility model relates to the field of TDS monitoring technology, and in particular to a TDS monitoring instrument and its control circuit. Background Technology

[0002] Secondary pollution issues exist in water supply systems, such as water tank supply in high-rise buildings and long tap water pipelines, which can cause potential contamination from rust, sediment, and microorganisms. Therefore, water purifiers have emerged. Water purifiers mainly consist of a shell and filter cartridges. As the purifier is used over time, scale will build up on the filter cartridges, eventually causing blockage. However, current water purifiers do not automatically remind users to replace the filter cartridges; users must rely on their own judgment to determine when replacement is needed. If users forget to replace the filter cartridges for an extended period, the water quality may become unsuitable for drinking. Furthermore, the TDS value of a new filter or cartridge is likely to exceed 300 on the first pass, requiring flushing to remove any residue. Therefore, devices that provide real-time water quality alerts are crucial. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a TDS monitor and its control circuit, which can display the TDS detection results in segments, realize a quick and intuitive understanding of the TDS value of drinking water, facilitate the rapid evaluation of the filtration effect of drinking water filters, and also facilitate prompts for subsequent operations.

[0004] To solve the above-mentioned technical problems, the first aspect of this utility model discloses a control circuit for a TDS monitor, the TDS monitor including a TDS measurement module capable of outputting TDS values, the TDS monitor being used to detect the TDS value of drinking water; including a power supply, a control chip, a first LED, a second LED, a third LED, a first resistor, a second resistor, and a third resistor;

[0005] The control chip has a TDS input pin, a first indicator pin, a second indicator pin, and a third indicator pin; the data output terminal of the TDS measurement module is electrically connected to the TDS input pin of the control chip.

[0006] The first indicator pin is electrically connected to the power supply via the first LED and the first resistor; the second indicator pin is electrically connected to the power supply via the second LED and the second resistor; the third indicator pin is electrically connected to the power supply via the third LED and the third resistor.

[0007] The control chip adjusts the output voltage of the first indicator pin, the second indicator pin, and the third indicator pin respectively through the input data of the TDS input pin.

[0008] As an optional implementation, it also includes a speaker, a transistor, a fourth resistor, and a fifth resistor;

[0009] The first input terminal of the speaker is electrically connected to the power supply; the control chip also has a fourth pin, which is grounded via a fourth resistor and a fifth resistor respectively; the base of the transistor is connected to the electrical connection line between the fourth resistor and the fifth resistor, the emitter of the transistor is grounded, and the collector of the transistor is electrically connected to the second input terminal of the speaker;

[0010] The power source is a battery, and the control chip is also used to monitor the remaining power of the battery. The fourth pin of the control chip outputs a high potential when the battery has a low power.

[0011] As another optional implementation, the power supply battery is an AA battery.

[0012] As another alternative implementation, the first LED light is green, the second LED light is yellow, and the third LED light is red.

[0013] As another optional implementation, a diode is also included; the positive terminal of the diode is electrically connected to the collector of the transistor, and the negative terminal of the diode is connected to the electrical connection line between the power supply and the first input terminal of the speaker.

[0014] As another optional implementation, a first capacitor is also included, one end of which is grounded and the other end is connected to the electrical connection line between the power supply and the first input terminal of the speaker.

[0015] As another alternative implementation, a sixth resistor is also included, which is connected in parallel with the speaker.

[0016] The second aspect of this utility model discloses a TDS monitor, including the control circuit described in the first aspect of this utility model.

[0017] As an optional implementation, an adapter for connecting the filter output line in series is also included.

[0018] As another optional implementation, the housing of the TDS monitor is made of food-grade PP material.

[0019] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0020] When the TDS measurement module outputs a TDS value between 0 and 300 mg / L, the output voltage of the first indicator pin G can be adjusted to illuminate the first LED (LED1). When the TDS measurement module outputs a TDS value between 301 and 600 mg / L, the output voltage of the second indicator pin Y can be adjusted to illuminate the second LED (LED2). When the TDS measurement module outputs a TDS value greater than 601 mg / L, the output voltage of the third indicator pin R can be adjusted to illuminate the third LED (LED3). In this way, the TDS test results can be displayed in segments, allowing for a quick and intuitive understanding of the TDS value of drinking water. This facilitates rapid evaluation of the filtration effect of the drinking water filter and also provides prompts for subsequent operations. For example, when the third LED (LED3) is lit, it indicates that the filter or filter cartridge should be replaced. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a partial structural diagram of the control circuit of a TDS monitor disclosed in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of another part of the control circuit of a TDS monitor disclosed in an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the control chip structure of the control circuit of a TDS monitor disclosed in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of another part of the control circuit of a TDS monitor disclosed in an embodiment of this utility model. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] See Figures 1-4 This utility model discloses a control circuit for a TDS monitor. The TDS monitor includes a TDS measurement module that can output TDS values. The TDS monitor is used to detect the TDS value of drinking water. It includes a power supply VCC, a control chip, a first LED LED1, a second LED LED2, a third LED LED3, a first resistor R1, a second resistor R2, and a third resistor R3.

[0029] The control chip has a TDS input pin (including...) Figure 3 The TDS measurement module has three pins: TDS_E+ and TDS_E-, first indicator pin G, second indicator pin Y, and third indicator pin R; and its data output terminal (TDS_E+ and TDS_E-). Figure 4 The TDS+ and TDS- pins are electrically connected to the TDS input pins of the control chip.

[0030] The first indicator pin G is electrically connected to the power supply VCC via the first LED LED1 and the first resistor R1; the second indicator pin Y is electrically connected to the power supply VCC via the second LED LED2 and the second resistor R2; the third indicator pin R is electrically connected to the power supply VCC via the third LED LED3 and the third resistor R3.

[0031] The control chip regulates the output voltages of the first indicator pin G, the second indicator pin Y, and the third indicator pin R respectively through the input data of the TDS input pin.

[0032] When the TDS measurement module outputs a TDS value between 0 and 300 mg / L, the output voltage of the first indicator pin G can be adjusted to illuminate the first LED (LED1). When the TDS measurement module outputs a TDS value between 301 and 600 mg / L, the output voltage of the second indicator pin Y can be adjusted to illuminate the second LED (LED2). When the TDS measurement module outputs a TDS value greater than 601 mg / L, the output voltage of the third indicator pin R can be adjusted to illuminate the third LED (LED3). In this way, the TDS test results can be displayed in segments, allowing for a quick and intuitive understanding of the TDS value of drinking water. This facilitates rapid evaluation of the filtration effect of the drinking water filter and also provides prompts for subsequent operations. For example, when the third LED (LED3) is lit, it indicates that the filter or filter cartridge should be replaced.

[0033] In an optional embodiment, it also includes a speaker BP, a transistor Q1, a fourth resistor, and a fifth resistor;

[0034] The first input terminal of the speaker BP is electrically connected to the power supply VCC; the control chip also has a fourth pin RP, which is grounded through a fourth resistor R8 and a fifth resistor R9; the base of the transistor Q1 is connected to the electrical connection line between the fourth resistor R8 and the fifth resistor R9, the emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is electrically connected to the second input terminal of the speaker BP.

[0035] The power supply VCC is a power supply battery. The control chip is also used to monitor the remaining power of the power supply battery. The fourth pin RP of the control chip outputs a high potential when the power supply battery has a low power.

[0036] When the fourth pin RP of the control chip outputs a high potential, transistor Q1 is connected, grounding the second input terminal of speaker BP. The first input terminal of speaker BP is then connected to the power supply VCC, thus activating speaker BP to remind the user to change the battery. Optionally, when the battery is low, one or more LEDs can be turned on to enhance the reminder.

[0037] In yet another alternative embodiment, a sixth resistor R6 is also included, which is connected in parallel with the speaker BP.

[0038] In yet another optional embodiment, the power supply battery is an AA battery.

[0039] In another alternative embodiment, the first LED LED1 is a green light, the second LED LED2 is a yellow light, and the third LED LED3 is a red light.

[0040] In another optional embodiment, a diode D1 is also included; the positive terminal of the diode D1 is electrically connected to the collector of the transistor Q1, and the negative terminal of the diode D1 is connected to the electrical connection line between the power supply VCC and the first input terminal of the speaker BP.

[0041] In another alternative embodiment, a first capacitor C4 is also included, one end of which is grounded and the other end is connected to the electrical connection line between the power supply VCC and the first input terminal of the speaker BP.

[0042] Example 2

[0043] This utility model discloses a TDS monitor, including the control circuit described in Embodiment 1.

[0044] In an optional embodiment, an adapter for connecting the filter output line in series is also included.

[0045] In yet another optional embodiment, the housing of the TDS monitor is made of food-grade PP material.

[0046] The contents disclosed in this utility model embodiment are merely preferred embodiments of this utility model and are only used to illustrate the technical solutions of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A control circuit for a TDS monitor, the TDS monitor comprising a TDS measurement module capable of outputting a TDS value, the TDS monitor being used to detect the TDS value of drinking water; characterized in that, Includes power supply, control chip, first LED, second LED, third LED, first resistor, second resistor, and third resistor; The control chip has a TDS input pin, a first indicator pin, a second indicator pin, and a third indicator pin; the data output terminal of the TDS measurement module is electrically connected to the TDS input pin of the control chip. The first indicator pin is electrically connected to the power supply via the first LED and the first resistor, respectively. The second indicator pin is electrically connected to the power supply via the second LED and the second resistor, respectively. The third indicator pin is electrically connected to the power supply via the third LED and the third resistor, respectively. The control chip adjusts the output voltage of the first indicator pin, the second indicator pin, and the third indicator pin respectively through the input data of the TDS input pin.

2. The control circuit of claim 1, wherein, It also includes a speaker, a transistor, a fourth resistor, and a fifth resistor; The first input terminal of the speaker is electrically connected to the power supply; the control chip also has a fourth pin, which is grounded via a fourth resistor and a fifth resistor respectively; the base of the transistor is connected to the electrical connection line between the fourth resistor and the fifth resistor, the emitter of the transistor is grounded, and the collector of the transistor is electrically connected to the second input terminal of the speaker; The power source is a battery, and the control chip is also used to monitor the remaining power of the battery. The fourth pin of the control chip outputs a high potential when the battery has a low power.

3. The control circuit of claim 2, wherein, The power supply battery is a size 5 battery.

4. The control circuit of claim 1, wherein, The first LED light is green, the second LED light is yellow, and the third LED light is red.

5. The control circuit of claim 2, wherein, It also includes a diode; the positive terminal of the diode is electrically connected to the collector of the transistor, and the negative terminal of the diode is connected to the electrical connection line between the power supply and the first input terminal of the speaker.

6. The control circuit of claim 2, wherein, It also includes a first capacitor, one end of which is grounded and the other end is connected to the electrical connection line between the power supply and the first input terminal of the speaker.

7. The control circuit of claim 2, wherein, It also includes a sixth resistor, which is connected in parallel with the speaker.

8. A TDS monitor characterized in that, Includes the control circuit as described in any one of claims 1 to 6.

9. The TDS monitor of claim 8, wherein, It also includes adapters for connecting the output lines of the series filters.

10. The TDS monitor of claim 8, wherein, The casing of the TDS monitor is made of food-grade PP material.

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