CN110940466A - Water purifier - Google Patents

Water purifier Download PDF

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Publication number
CN110940466A
CN110940466A CN201811117040.9A CN201811117040A CN110940466A CN 110940466 A CN110940466 A CN 110940466A CN 201811117040 A CN201811117040 A CN 201811117040A CN 110940466 A CN110940466 A CN 110940466A
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CN
China
Prior art keywords
water
electrode
resistor
detection
electrically connected
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Application number
CN201811117040.9A
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Chinese (zh)
Inventor
陈建华
刘红星
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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Priority to CN201811117040.9A priority Critical patent/CN110940466A/en
Publication of CN110940466A publication Critical patent/CN110940466A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The invention relates to a water purifier, which comprises a shell, a filtering device arranged in the shell, a water inlet pipe and a water outlet pipe which are respectively connected with the filtering device, and a water leakage detection device arranged in the shell, wherein the water leakage detection device comprises a water quality sensor with two electrode probes, a detection electrode with two electrode probes, and a control circuit board which is respectively and electrically connected with the water quality sensor and the detection electrode. The water quality sensor is arranged in the water path, one electrode probe of the water quality sensor is electrically connected with one input end of the control circuit board, and the other electrode probe of the water quality sensor is grounded. The detection electrode is arranged at the water leakage detection position, one electrode probe of the detection electrode is electrically connected with the other input end of the control circuit board, and the other electrode probe of the detection electrode is grounded. This water purifier can effectively distinguish condensate water and the condition of leaking, and then avoids the condensate water wrong report alert, and the detection of leaking is accurate, uses the hommization.

Description

Water purifier
Technical Field
The present invention relates to a water purifier.
Background
A water leakage detection device is generally installed in an existing water purifier to detect a water leakage situation of the water purifier. For example, the published water purifier comprises a shell and a water leakage detection component arranged at the bottom of the shell, wherein the water leakage detection component comprises a detection plate and a first electrode and a second electrode which are arranged on the detection plate at intervals, and the first electrode and the second electrode are both provided with electrode bars. When water leaks outwards from different positions of the bottom plate of the shell, the electrode rods 23 uniformly distributed on the first electrode 21 and the second electrode 22 can detect the water leakage, and then the water leakage alarm is carried out. The water leakage detection device detects water leakage through the conduction of the two electrodes, but in the use process, condensate water also occurs, the occurrence of the condensate water is not caused by the sealing or fault problem of the water purifier, and the water leakage alarm work is not required under the condition. However, if the water leakage detection device is adopted, water leakage alarm can be performed under the condition of condensed water, the false alarm condition of the condensed water can be frequently generated, and then a user is guided to maintain the water purifier, frequent disassembly of the water purifier is not beneficial to the maintenance of the sealing performance and the service life of the water purifier, and meanwhile, the maintenance cost is high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a water purifier capable of effectively distinguishing condensate water and water leakage conditions so as to avoid false alarm of condensate water.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a water purifier, includes the casing, sets up the filter equipment in the casing and respectively with inlet tube, the outlet pipe that filter equipment is connected, its characterized in that: the water leakage detection device is arranged in the shell and comprises
The water quality sensor comprises two electrode probes and is arranged in the water path;
the detection electrode comprises two electrode probes and is arranged at the water leakage detection position in the water purifier;
the control circuit board is electrically connected with the water quality sensor and the detection electrode respectively and is used for comparing detection signals of the water quality sensor and the detection electrode and outputting a water leakage detection signal;
one electrode probe of the water quality sensor is electrically connected with one input end of the control circuit board, and the other electrode probe of the water quality sensor is grounded;
one electrode probe of the detection electrode is electrically connected with the other input end of the control circuit board, and the other electrode probe of the detection electrode is grounded.
Simply, control circuit board includes first detection return circuit, second detection return circuit and controller, the input of first detection return circuit is connected with water quality sensor's electrode probe electricity, and the input of second detection return circuit is connected with the electrode probe electricity of measuring electrode, the output of first detection return circuit, second detection return circuit is connected with the controller electricity respectively.
In order to facilitate water leakage prompt, the control circuit board further comprises a display lamp and/or a buzzer which are electrically connected with the controller.
Preferably, the first detection loop comprises a first resistor and a second resistor, a first end of the first resistor is connected with the power supply, a second end of the first resistor is electrically connected with an electrode probe of the water quality sensor, a first end of the second resistor is electrically connected with a second end of the first resistor, and a second end of the second resistor is electrically connected with a signal input end of the controller;
the second detection loop comprises a third resistor and a fourth resistor, the resistance of the third resistor is larger than or equal to that of the first resistor, the resistance of the fourth resistor is equal to that of the second resistor, the first end of the third resistor is connected with the power supply, the second end of the third resistor is electrically connected with the electrode probe of the water quality sensor, the first end of the fourth resistor is electrically connected with the second end of the third resistor, and the second end of the fourth resistor is electrically connected with another signal input end of the controller.
Preferably, the number of the detection electrodes is at least two, and each detection electrode is electrically connected with the control circuit board respectively.
Preferably, the water quality sensor is a TDS sensor.
Preferably, the detection electrode is disposed at a water leakage detection position of the bottom of the case.
Conveniently, still be provided with the setting key of being connected with control circuit board electricity on the casing.
Compared with the prior art, the invention has the advantages that: this water purifier utilizes the quality of water sensor as reference electrode, detect the signal when water switches on two probes in this quality of water sensor in the water route, set up detection electrode in the position of leaking simultaneously, so under the condition that two electrode probes at detection electrode switched on by the comdenstion water or the water in the pipeline of revealing, the signal of output is different yet, then can carry out the comparison calculation with detection electrode's detected signal and quality of water sensor's signal, the result of calculation can effectual differentiation be the comdenstion water and flow to the condition of the position of leaking or the condition that leaks appears in the inside device of water purifier, the judgement that can be accurate is the condition of leaking, so can avoid the wrong report of comdenstion water to police, the frequent warning of mistake revealing, overhaul work has been reduced, use more humanized.
Drawings
Fig. 1 is a circuit diagram of a water leakage detection device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the water purifier in this embodiment includes a housing, a filtering device installed in the housing, a water inlet pipe and a water outlet pipe connected to the filtering device, and a water leakage detecting device disposed in the housing. The filter equipment can adopt current filter equipment, if can adopt the cotton filter core of PP, active carbon filter core, ultrafiltration filter core, the filter equipment that the active carbon filter core connected gradually formed, advance water piping connection at the entry end of the cotton filter core of PP to the inlet tube can be used to connect the water source. The water outlet pipe is connected with the outlet end of the activated carbon filter element and is used for providing purified water resources for users.
The water leakage detection device in the embodiment comprises a water quality sensor 1, a detection electrode 2 and a control circuit board 3. The water quality sensor 1 and the detection electrode 2 both comprise two electrode probes.
In this embodiment, the water quality sensor 1 is disposed in the water outlet pipe of the water purifier and is used for detecting the quality of the outlet water of the water purifier. The water quality sensor in this embodiment adopts a TDS sensor for detecting the conductivity of water. Two electrodes of the water quality sensor 1The electrode probes are always kept in a communicated state in the using process of the water purifier, water between the two electrode probes forms a certain equivalent resistance, the equivalent resistance formed by the water between the two electrode probes fluctuates along with changes due to the difference of water quality in different regions and the difference of service life of the filtering device, and in the embodiment, the equivalent resistance formed by the water between the two electrode probes is recorded as Rw。
The detection electrode 2 is arranged at a water leakage detection position, and the water leakage detection position is usually positioned at the bottom of the water purifier, namely two electrode probes of the detection electrode 2 are arranged at the water leakage detection position at the bottom of the water purifier. The number of the detection electrodes 2 is determined according to the number of the water leakage detection positions, that is, one detection electrode 2 is provided for each water leakage detection position. The detection electrode 2 may also be placed at a sensitive water leak point. The water purifier can produce the comdenstion water when work, and when the comdenstion water fell in the water purifier bottom, the condition of leaking did not appear in the inside device of water purifier, need not to leak water and reports to the police under this kind of condition. Only under the condition that the device in the water purifier is not sealed tight or damaged and leak water, the water leakage alarm needs to be carried out, and then the user is reminded to maintain, and the safety problem caused by larger damage is avoided.
The control circuit board 3 is electrically connected with the water quality sensor 1 and the detection electrode 2 respectively and is used for comparing and calculating detection signals of the water quality sensor 1 and the detection electrode 2 so as to obtain corresponding detection signals. The control circuit board 3 includes a first detection circuit 31, a second detection circuit 32, a controller 33 and an alarm device, wherein the controller 33 may be a single-chip microcomputer. The input end of the first detection circuit 31 is electrically connected with one electrode probe of the water quality sensor 1, and the other electrode probe of the water quality sensor 1 is grounded. The input end of the second detection circuit 32 is electrically connected to the electrode probe of the detection electrode 2, and the other electrode probe of the detection electrode 2 is grounded. The output ends of the first detection circuit 31 and the second detection circuit 32 are electrically connected to the controller 33. The alarm device can adopt a display lamp 4 and/or a buzzer 5, and is electrically connected with the output end of the controller 33. The power connection terminal of the controller 33 has one end connected to the power supply and the other end grounded.
Specifically, the first detection circuit 31 includes a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is connected to the power supply, a second end of the first resistor R1 is electrically connected to the electrode probe of the water quality sensor 1, a first end of the second resistor R2 is electrically connected to a second end of the first resistor R1, and a second end of the second resistor R2 is electrically connected to a signal input terminal of the controller 33.
The second detection circuit 32 comprises a third resistor R3 and a fourth resistor R4, the resistance of the third resistor R3 is greater than or equal to the resistance of the first resistor R1, the resistance of the fourth resistor R4 is equal to the resistance of the second resistor R2, the first end of the third resistor R3 is connected with the power supply, the second end of the third resistor R3 is electrically connected with the electrode probe of the water quality sensor 1, the first end of the fourth resistor R4 is electrically connected with the second end of the third resistor R3, and the second end of the fourth resistor R4 is electrically connected with the reverse input end of the controller 33. In this embodiment, the resistance of the third resistor R3 is greater than the resistance of the first resistor R1. The resistance of the third resistor R3 is adjusted according to the sensitivity of the water leakage detecting device, but if the resistance of the third resistor R3 is determined, the detection sensitivity of the water leakage detecting device is determined. The smaller the resistance of the third resistor R3, the higher the sensitivity.
For the purpose of description below, the voltage at the second terminal of the first resistor R1 is defined as V1, the voltage at the second terminal of the third resistor R3 is defined as V2, and the power supply voltage is VCC.
The water quality sensor 1 is connected in water, so that two electrode probes of the water quality sensor 1 are connected together through tap water to form a loop, and the voltage value of V1 is the equivalent resistance R of water between the first resistance R1 and the probe of the water quality sensor 1wI.e. V1-VCC Rw/(Rw+ R1), corresponding V1<VCC。
Normally, the water leakage detection position in the water purifier is water-free, that is, the two electrode probes of the detection electrode 2 are not conducted, and V2 is VCC, and V2> V1. At this time, the controller 33 converts the voltage signal into water conductivity data, and then compares the water conductivity data with the conductivity data of water obtained by the water quality sensor, at this time, the difference calculated by the controller inevitably exceeds the preset water conductivity difference threshold corresponding to the water leakage alarm, and at this time, the controller 33 controls not to perform the alarm action, that is, the display lamp 4 is not on, and the buzzer 5 does not sound.
When the condensed water falls to the water leakage detection position, the condensed water is pure water or close to pure water, so that the equivalent resistance R of the condensed water between the two electrode probes of the detection electrode 2 is much larger than the equivalent resistance of water between the two electrode probes of the water quality sensor 1. Therefore V2 ≈ VCC, when V2> V1. The controller 33 converts the voltage signal into water conductivity data, and compares the water conductivity data with the conductivity data of water obtained by the water quality sensor, at this time, the difference calculated by the controller still does not exceed the preset water conductivity difference threshold corresponding to the water leakage alarm, and the controller 33 controls not to perform the alarm action at this time, namely, the display lamp 4 is not on, and the buzzer 5 does not sound.
When water in the water path falls to the water leakage detection position, namely under the condition of real water leakage, the two electrode probes of the detection electrode 2 are immersed, and the equivalent resistance R of the water between the two electrode probes of the detection electrode 2 is approximately equal to RwHowever, since R3 > R1 and R2 ═ R4, V2<At V1, the controller 33 converts the voltage signal into water conductivity data, and compares the water conductivity data with the water conductivity data obtained by the water quality sensor, at this time, the difference calculated by the controller 33 inevitably exceeds the preset water conductivity difference threshold corresponding to the water leakage alarm, and at this time, the controller 33 controls the display lamp 4 to light up and the buzzer 5 to sound to prompt the situation of water leakage. The threshold value of the difference of the conduction rates of the water set in the controller 33 can be adjusted by setting the setting key 6, so that the water leakage sensor can be conveniently applied to different water leakage sensitivity environments.
This water purifier is on utilizing the water quality sensor to go out water quality testing's basis, utilize the detected signal of water quality sensor as the detection reference signal that leaks simultaneously, and then according to the actual conditions of quality of water, and not according to the fixed value that sets up judging of leaking, make the adaptability of the judgement of leaking better, this water purifier can also effectively distinguish condensate water and the condition of leaking simultaneously, and then carry out the wrong report police's that leaks under avoiding the condensate water condition the condition, alarm information is more accurate, maintenance work has been reduced, it is more humanized to use.

Claims (8)

1. The utility model provides a water purifier, includes the casing, sets up the filter equipment in the casing and respectively with inlet tube, the outlet pipe that filter equipment is connected, its characterized in that: the water leakage detection device is arranged in the shell and comprises
The water quality sensor (1) comprises two electrode probes and is arranged in the water path;
a detection electrode (2) comprising two electrode probes, which is arranged at the water leakage detection position in the water purifier;
the control circuit board (3) is electrically connected with the water quality sensor (1) and the detection electrode (2) respectively and is used for comparing detection signals of the water quality sensor (1) and the detection electrode (2) and outputting a water leakage detection signal;
one electrode probe of the water quality sensor (1) is electrically connected with one input end of the control circuit board (3), and the other electrode probe of the water quality sensor (1) is grounded;
one electrode probe of the detection electrode (2) is electrically connected with the other input end of the control circuit board (3), and the other electrode probe of the detection electrode (2) is grounded.
2. The water purifier according to claim 1, characterized in that: the control circuit board (3) comprises a first detection circuit (31), a second detection circuit (32) and a controller (33), wherein the input end of the first detection circuit (31) is electrically connected with an electrode probe of the water quality sensor (1), the input end of the second detection circuit (32) is electrically connected with an electrode probe of the detection electrode (2), and the output ends of the first detection circuit (31) and the second detection circuit (32) are respectively electrically connected with the controller (33).
3. The water purifier according to claim 2, characterized in that: the control circuit board (3) further comprises a display lamp (4) and/or a buzzer (5) which are electrically connected with the controller (33).
4. The water purifier according to claim 2 or 3, characterized in that: the first detection circuit (31) comprises a first resistor (R1) and a second resistor (R2), a first end of the first resistor (R1) is connected with a power supply, a second end of the first resistor (R1) is electrically connected with an electrode probe of the water quality sensor (1), a first end of the second resistor (R2) is electrically connected with a second end of the first resistor (R1), and a second end of the second resistor (R2) is electrically connected with one signal input end of the controller (33);
the second detection circuit (32) comprises a third resistor (R3) and a fourth resistor (R4), the resistance value of the third resistor (R3) is larger than or equal to that of the first resistor (R1), the resistance value of the fourth resistor (R4) is equal to that of the second resistor (R2), the first end of the third resistor (R3) is connected with a power supply, the second end of the third resistor (R3) is electrically connected with an electrode probe of the water quality sensor (1), the first end of the fourth resistor (R4) is electrically connected with the second end of the third resistor (R3), and the second end of the fourth resistor (R4) is electrically connected with the other signal input end of the controller (33).
5. A water purifier according to any one of claims 1 to 3, characterized in that: the number of the detection electrodes (2) is at least two, and each detection electrode (2) is electrically connected with the control circuit board (3) respectively.
6. A water purifier according to any one of claims 1 to 3, characterized in that: the water quality sensor (1) is a TDS sensor.
7. A water purifier according to any one of claims 1 to 3, characterized in that: the detection electrode (2) is arranged at the water leakage detection position at the bottom of the shell.
8. A water purifier according to any one of claims 1 to 3, characterized in that: the shell is also provided with a setting key (6) electrically connected with the control circuit board (3).
CN201811117040.9A 2018-09-25 2018-09-25 Water purifier Pending CN110940466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811117040.9A CN110940466A (en) 2018-09-25 2018-09-25 Water purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811117040.9A CN110940466A (en) 2018-09-25 2018-09-25 Water purifier

Publications (1)

Publication Number Publication Date
CN110940466A true CN110940466A (en) 2020-03-31

Family

ID=69905019

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811117040.9A Pending CN110940466A (en) 2018-09-25 2018-09-25 Water purifier

Country Status (1)

Country Link
CN (1) CN110940466A (en)

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