CN112213360A - Anode rod detection device for water heater and water heater - Google Patents
Anode rod detection device for water heater and water heater Download PDFInfo
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Abstract
The invention discloses an anode rod detection device for a water heater and the water heater, wherein the detection device comprises a control module, an anode rod detection circuit and a switch mechanism, and the switch mechanism is arranged in the anode rod detection circuit; the switch mechanism is used for switching on and switching off the hydraulic pressure change in a water pipe of the water heater; when the switch mechanism is closed, the anode rod detection circuit is respectively electrically connected with the control module and an anode rod arranged in the water heater, and the control module is used for generating a control signal to control the anode rod detection circuit to be opened and detected, so that the consumption of the anode rod is detected. Through the arrangement, the danger of water flow conduction can be avoided when the water heater is used, and meanwhile, the normal detection of the anode rod is not influenced when the water heater is not used, namely, the control of a detection circuit on the anode rod is realized by utilizing the hydraulic pressure change in the water pipe, and the running reliability of the water heater is ensured.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to an anode rod detection device for a water heater and the water heater.
Background
The water heater has a plurality of components, wherein the anode bar is necessary in the water heaterThe essential components. This is because the water flowing into the inner container is not pure water, and the inner container is corroded due to various impurities and certain corrosiveness. The main component of the anode rod is magnesium, and in the inner container of the water heater, the anode rod and the inner container (the main component is iron) are simultaneously contacted with water, so that a galvanic cell is formed due to the chemical principle. Since magnesium is more reactive than iron, it is more likely to become magnesium ion (Mg)2+) So that magnesium ions can be dissolved in water first, and at the moment, the magnesium ions are preferentially separated from the magnesium rod and combined with oxygen, and the corrosion process is finished. In other words, the magnesium rod is corroded, and the inner container is ensured to be intact. Therefore, most manufacturers can install the magnesium rod for the water heater, so that the inner container is protected, and the service life of the electric water heater is prolonged.
On this basis, in order to judge the corrosion consumption degree of the anode bar in time, a detection device is arranged to monitor in real time so as to replace in time. Since the detected circuit system is electrified, the anode rod is in the inner container, and therefore, the continuous start of the detection system can electrify the fluid contacted with the anode rod, so that the water flow of the water heater in the use process can be electrified, and therefore, certain danger exists, when the water flow flows through the skin of a human body, the crisp feeling of electric shock can be generated, and the use experience of a user is poor.
Disclosure of Invention
The invention aims to overcome the defect that water flow is electrified when a circuit system for monitoring an anode rod works in a water heater in the prior art, and provides the water heater.
The invention solves the technical problems through the following technical scheme:
the invention provides an anode rod detection device for a water heater, which comprises a control module, an anode rod detection circuit and a switch mechanism, wherein the switch mechanism is arranged in the anode rod detection circuit;
the switch mechanism is used for switching on and switching off according to the hydraulic pressure change in a water pipe of the water heater;
when the switch mechanism is closed, the anode rod detection circuit is respectively electrically connected with the control module and an anode rod arranged in the water heater, and the control module is used for generating a control signal to control the anode rod detection circuit to be opened and detected, so that the consumption of the anode rod is detected.
In the scheme, a switch mechanism is arranged in an anode rod detection circuit and is switched on and off according to the hydraulic pressure change in a water pipe of the water heater; when the switch mechanism is closed, the control module controls the anode rod detection circuit to be opened to detect the consumption of the anode rod; when this on-off mechanism disconnection, then detection device stops to detect, through the aforesaid setting for the water heater can avoid the electrically conductive danger of rivers in the use, and the water heater does not influence the normal detection to the anode rod at the in-process that does not use simultaneously, has utilized the hydraulic pressure change in the water pipe to realize the control to detection circuitry on the anode rod promptly, has guaranteed the reliability of water heater operation.
Preferably, the switch mechanism comprises a switch assembly and a power assembly;
the power assembly is used for driving the switch assembly to be switched on and off through hydraulic change in a water pipe of the water heater.
In the scheme, the power assembly senses whether the water heater generates pressure difference change due to water consumption change or not through the switch assembly and the power assembly, namely the switch assembly is opened or closed by sensing the pressure difference change in a water pipe of the water heater, and the switch assembly is closed when the pressure difference change is large, so that a detection circuit is conducted, and the detection of the anode rod is realized; the switch assembly is disconnected when the pressure difference changes less, so that the detection circuit system is disconnected, and through the arrangement, the power assembly can disconnect the switch assembly when the water heater is used, so that the defect that the water flow conduction influences the user experience feeling when the detection circuit system works is avoided, and meanwhile, the normal detection of the anode rod is not influenced when the water heater is not used.
Preferably, the switch assembly includes two connection ends separately disposed from each other;
the power assembly comprises a connecting piece and an elastic sealing piece;
one end of the connecting piece is connected to the elastic sealing piece, and the other end of the connecting piece is provided with a wiring terminal for electrically connecting the two connecting ends;
the elastic sealing element is arranged at the opening of the water pipe of the water heater in a liquid-tight manner and deforms according to the pressure difference between the inside and the outside of the water pipe to drive the connecting piece to contact with and be away from the two connecting ends.
In this scheme, set up elastic sealing element through the opening part liquid-tightly at the water pipe for elastic sealing element can drive the connecting piece according to the state of rivers and remove in order to realize controlling the switching on or the disconnection of detection circuitry through the pressure differential change in the elastic sealing element.
Preferably, the elastic sealing element is a movable membrane. Based on the elasticity performance of activity involucra, can produce deformation along with the inside and outside pressure differential of water pipe to realize producing great deformation when the user uses water, produce less deformation when the user does not use water and resume to initial condition even and produce the displacement in order to drive the connecting piece.
Preferably, the elastic sealing element is arranged at the opening of the water pipe in a liquid-tight manner through a fixing element. The elastic sealing element is fixedly arranged on the shell of the water pipe through the fixing piece so as to ensure the stability of the structure.
Preferably, the fixing member includes a fixing ring. The fixing ring is simple and convenient in arrangement mode, light in structure and beneficial to installation and fixation.
Preferably, the connection end includes an electrode sheet; the electrode slice is simple and convenient in arrangement mode and light and handy in structure.
The connecting piece comprises a connecting rod and a cross rod perpendicular to the connecting rod;
the end part of the connecting rod, far away from the elastic sealing element, and the cross rod are respectively provided with the connecting terminal so as to be in contact with the two electrode plates for conducting electricity, and each connecting terminal comprises at least one conducting contact;
the connecting rod with the horizontal pole be connected with between the binding post set up in connecting piece inside connecting wire. Through the structure setting of mutually perpendicular's connecting rod and horizontal pole, connecting rod and an electrode slice contact this moment, the horizontal pole contacts with another electrode slice to guarantee circuit connection's stability and reliability.
Preferably, the water pipe is a water inlet pipeline or a water outlet pipeline of the water heater.
Preferably, the connector and the connection end are both arranged outside the water pipe, so as to eliminate the influence of the conductivity of the water flow in the water heater on the electric connection of the connector and the connection end.
Preferably, the anode rod detection circuit is configured to output an electrical signal according to the control signal and send the electrical signal to the control module, and the control module is configured to generate a detection result for representing the consumption of the anode rod according to the electrical signal. The anode rod detection circuit can calculate the consumption of the anode rod according to the size of the electric signal, so that real-time consumption data of the anode rod can be dynamically and quantitatively monitored, and the use experience of a user is improved.
Preferably, the control module is further configured to determine whether the electrical signal reaches a set threshold, and if so, generate an alarm signal for replacing the anode rod; and/or controlling the anode bar detection circuit to stop detection. Whether the anode rod is consumed or not is determined through comparison of the size of the electric signal, and an alarm signal is generated when the anode rod is consumed so as to inform a user of replacing the anode rod, so that the use experience of a customer is improved while the timeliness of replacement is ensured. In addition, the detection device is in a non-operating state when the anode bar is replaced.
Preferably, the anode rod detection circuit comprises a switch control circuit and a first resistor;
the input end of the switch control circuit is electrically connected with the driving signal output end of the control module, the first connecting end and the second connecting end of the switch control circuit are respectively and electrically connected with two ends of the anode bar, the output end of the switch control circuit is respectively and electrically connected with one end of the first resistor and the signal input end of the control module, and the other end of the first resistor is grounded;
wherein the electrical signal is a voltage signal;
the control module is used for calculating a current value in the anode bar according to the voltage signal and the resistance value of the first resistor, judging whether the current value is smaller than the set threshold value or not, and if yes, generating an alarm signal for replacing the anode bar.
Preferably, the switch control circuit includes a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, a first capacitor and a second capacitor;
one end of the second resistor is electrically connected with a driving signal output end of the control module, the other end of the second resistor is respectively electrically connected with a base electrode of the first transistor and one end of the third resistor, and the other end of the third resistor is electrically connected with one end of the first resistor; one end of the fourth resistor is electrically connected with a power supply end, the other end of the fourth resistor is electrically connected with one end of the first capacitor, one end of the second capacitor and one end of the anode bar respectively, the other end of the first capacitor is electrically connected with the collector electrode of the first transistor, the collector electrode of the second transistor, the other end of the second capacitor and the other end of the anode bar respectively, the emitter electrode of the first transistor is electrically connected with the base electrode of the second transistor, and the emitter electrode of the second transistor is electrically connected with one end of the first resistor and the signal input end of the control module respectively.
Preferably, the anode rod detection circuit further comprises a fifth resistor, a sixth resistor, a third capacitor and a diode;
one end of the fifth resistor is electrically connected with one end of the first resistor, the other end of the fifth resistor is electrically connected with one end of the sixth resistor, one end of the third capacitor and the anode of the diode respectively, the cathode of the diode is electrically connected with an external power supply, and the other end of the sixth resistor and the other end of the third capacitor are grounded.
Preferably, the first transistor and the second transistor are both NPN transistors; and/or the first capacitor comprises an electrolytic capacitor.
The invention also provides a water heater, which comprises the anode rod detection device for the water heater.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
in the invention, a switch mechanism is arranged in an anode bar detection circuit, and the switch mechanism is closed and opened along with the deformation of pressure difference between the inside and the outside of a water pipe according to an elastic sealing piece arranged inside; when the switch mechanism is closed, the control module controls the anode rod detection circuit to be opened to detect the consumption of the anode rod; when this on-off mechanism disconnection, then detection device stops to detect, through the aforesaid setting for the water heater can avoid the electrically conductive danger of rivers in the use, and the water heater does not influence the normal detection to the anode rod at the in-process that does not use simultaneously, has utilized the hydraulic pressure change in the water pipe to realize the control to detection circuitry on the anode rod promptly, has guaranteed the reliability of water heater operation.
Drawings
Fig. 1 is a schematic structural diagram of an anode rod detection device for a water heater according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a first state of a switching mechanism in the anode rod detecting device according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of a second state of the switching mechanism in the anode rod detecting device according to embodiment 1 of the present invention.
Fig. 4 is a first circuit diagram of the anode rod detection device for the water heater according to embodiment 2 of the present invention.
Fig. 5 is a second schematic circuit diagram of the anode rod detection device for the water heater according to embodiment 2 of the present invention.
Fig. 6 is a schematic structural diagram of a water heater according to embodiment 3 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the anode rod detection device for a water heater of the present embodiment includes a control module 1, an anode rod detection circuit 2, and a switch mechanism 3, where the switch mechanism 3 is disposed in the anode rod detection circuit 2. Optionally, the control module is a single chip microcomputer, and the anode rod is a magnesium rod.
The switching mechanism 3 is used for switching on and off according to a hydraulic pressure change in a water pipe of the water heater. Wherein, the water pipe is the outlet conduit or the inlet conduit of water heater.
When the switch mechanism 3 is closed, the anode rod detection circuit 2 is respectively electrically connected with the control module 1 and an anode rod arranged in the water heater, and the control module 1 is used for generating a control signal to control the anode rod detection circuit 2 to open the consumption of the anode rod to be detected.
The anode rod detection circuit 2 is used for detecting the consumption condition of the anode rod. The anode rod detection circuit 2 comprises an anode rod arranged in the anode rod detection circuit and a miniature electric control system electrically connected to two ends of the anode rod respectively, the resistance of the anode rod changes along with consumption of the anode rod, and micro-current in the anode rod detection circuit 2 sensed in the electric control system also changes along with the generation. When the micro-current changes to a set threshold value, the electric control system sends out a warning to remind a user of replacing the anode rod.
The switch mechanism 3 can control the anode rod detection circuit 2 to be switched on and off according to the use state of the water heater, in particular to a hydraulic pressure change control module in a water pipe, which can be caused in the use process of the water heater.
Specifically, as shown in fig. 2 and 3, the switch mechanism 3 includes a switch assembly 4 and a power assembly 5, and the power assembly 5 is used for driving the switch assembly 4 to be switched on and off according to the hydraulic pressure change in the water inlet pipe 100.
Further, the power assembly 5 can sense whether the water heater generates a pressure difference change due to a water consumption change, that is, the switch assembly 4 can be opened or closed by sensing whether the water heater is being used, and when the water heater is not used, the switch assembly 4 is closed to conduct the anode rod detection circuit 2, and at this time, the power assembly 5 is in a first state as shown in fig. 2; when the water heater is in use, the switch assembly 4 is disconnected, so that the anode rod detection circuit 2 is disconnected, and the power assembly 5 is in a second state, as shown in fig. 3. Through the arrangement, the power assembly 5 can disconnect the switch assembly 4 when the water heater is used, so that the danger of water flow conduction is avoided, and meanwhile, the normal detection of the anode rod is not influenced when the water heater is not used.
Wherein, the switch component 4 comprises two connecting ends 6 which are arranged separately; in this embodiment, the connecting end 6 is an electrode plate.
The power assembly 5 comprises an elastic sealing element 7 and a connecting piece 8, one end of the connecting piece 8 is connected to the elastic sealing element 7, the other end of the connecting piece 8 is provided with a connecting terminal used for electrically connecting the two connecting ends 6, and each connecting terminal comprises at least one conductive contact.
Both the connector 8 and the connector 6 are provided outside the water pipe 100 to eliminate the influence of the electrical conductivity of the water flow itself in the water heater on the electrical connection of the connector 8 and the connector 6.
The elastic sealing element 7 is arranged at the opening of the water pipe 100 of the water heater in a liquid-tight way through a fixing piece 9 and deforms according to the pressure difference between the inside and the outside of the water pipe 100 so as to drive the connecting piece 8 to be in contact with and away from the two connecting ends 6.
Wherein, the elastic sealing element 7 includes but is not limited to a movable film, and the fixing element 9 includes but is not limited to a fixing ring.
The connecting piece 8 comprises a connecting rod 10 and a cross bar 11 arranged perpendicular to the connecting rod 10.
The end part of the connecting rod 10 far away from the elastic sealing element 7 and the cross rod 11 are both provided with connecting terminals to be in contact with two electrode plates (namely the connecting end 6) for conduction, and a connecting wire arranged inside the connecting piece 8 is connected between the connecting terminals of the connecting rod 10 and the cross rod 11. The connecting leads may also be arranged outside the connecting piece 8.
Specifically, when the user is not using the water heater, the water flow in the water pipe of the water heater is large, resulting in that the pressure in the water pipe on both sides of the elastic sealing member disposed at the opening of the water pipe is greater than the atmospheric pressure, and the elastic sealing member bulges outwards.
When a user uses the water heater to use water, the water flow in the water pipe of the water heater is reduced, so that the pressure in the water pipe on two sides of the elastic sealing element arranged at the opening of the water pipe is smaller than the atmospheric pressure, and the elastic sealing element reduces the swelling amplitude and even restores to the initial state.
In addition, although not shown in the drawings, the water heater of the present embodiment may further include a support member 200 fixed to the water pipe, the support member 200 supporting the connection rod and moving the connection rod along the axial direction of the connection rod. Alternatively, the supporting member 200 may include a sleeve sleeved on the connecting rod, and the supporting rod is slidably disposed relative to the sleeve.
In the embodiment, a switch mechanism is arranged in the anode rod detection circuit, and the switch mechanism is closed and opened along with the deformation of the pressure difference between the inside and the outside of the water pipe according to an elastic sealing piece arranged inside; when the switch mechanism is closed, the control module controls the anode rod detection circuit to open and detect the consumption of the anode rods; when this on-off mechanism disconnection, then detection device stops to detect, through the aforesaid setting for the water heater can avoid the electrically conductive danger of rivers in the use, and the water heater does not influence the normal detection to the anode rod at the in-process that does not use simultaneously, has utilized the hydraulic pressure change in the water pipe to realize the control to detection circuitry on the anode rod promptly, has guaranteed the reliability of water heater operation.
Example 2
The anode rod detection device for the water heater of the embodiment is a further improvement of the embodiment 1, and specifically:
the anode rod detection circuit 2 is used for outputting an electric signal according to the control signal and sending the electric signal to the control module 1, and the control module 1 is used for generating a detection result for representing the consumption of the anode rod according to the electric signal.
For example, the remaining amounts of the plurality of anode rods corresponding to different electrical signals are obtained, and the consumption amounts of the anode rods under different electrical signals are calculated.
When a brand new anode bar is installed in the water heater and the anode bar detection circuit is started to work, acquiring an initial electric signal output by the anode bar detection circuit; then, along with the consumption of the anode rod, the anode rod detection circuit outputs electric signals corresponding to different time points, so that the consumption degrees of the anode rods corresponding to the electric signals at different time points are obtained; i.e. by pre-establishing the electric signal and the consumption of the anode rodCorresponding relation in real time、The consumption conditions of the anode rod corresponding to different stages are fed back to the user quickly and accurately, and the use experience of the user is improved.
The control module 1 is also used for judging whether the electric signal reaches a set threshold value, and if so, generating an alarm signal for replacing the anode bar; and/or, the anode rod detection circuit 2 is controlled to stop detection.
Specifically, as shown in fig. 4, the anode rod detecting circuit 2 of the present embodiment includes a switch control circuit 12 and a first resistor R1.
Specifically, the input end of the switch control circuit 12 is electrically connected to the driving signal output end of the control module 11, the first connection end 6 and the second connection end 6 of the switch control circuit 12 are electrically connected to two ends of the anode rod, respectively, the output end of the switch control circuit 12 is electrically connected to one end of the first resistor R1 and the signal input end of the control module 11, respectively, and the other end of the first resistor R1 is connected.
The electric signal is a voltage signal, the control module 11 is configured to calculate a current value in the anode rod according to the voltage signal and a resistance value of the first resistor R1, and determine whether the current value is smaller than a set threshold, and if so, generate an alarm signal for replacing the anode rod.
Specifically, as shown in fig. 5, the switch control circuit 12 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first transistor Q1, a second transistor Q2, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a diode D1.
One end of the second resistor R2 is electrically connected to the driving signal output end of the control module 11, the other end of the second resistor R2 is electrically connected to the base of the first transistor Q1 and one end of the third resistor R3, respectively, and the other end of the seventh resistor is electrically connected to one end of the fifth resistor; one end of the fourth resistor R4 is electrically connected to the power supply terminal VCC, the other end of the fourth resistor R4 is electrically connected to one end of the first capacitor C1, one end of the second capacitor C2, and one end of the terminal a, respectively, the other end of the first capacitor C1 is connected to the collector of the first transistor Q1, the collector of the second transistor Q2, the other end of the second capacitor C2 and the other end of the terminal a are electrically connected, the emitter of the first transistor Q1 is electrically connected to the base of the second transistor Q2, the emitter of the second transistor Q2 is electrically connected to one end of the first resistor R1 and one end of the fifth resistor R5, the other end of the fifth resistor R5 is electrically connected to one end of the sixth resistor R6, the anode of the diode D1, one end of the third capacitor C3 and the signal input end of the control module 11, the cathode of the diode D1 is electrically connected to the external power supply, and the other end of the sixth resistor R6 and the other end of the third capacitor C3 are both grounded. The terminal A is electrically connected with two ends of the anode bar.
Optionally, the first capacitor includes an electrolytic capacitor, the first transistor Q1 and the second transistor Q2 are both NPN-type triodes, and the control module is a single chip microcomputer.
The detection device of the embodiment is specifically implemented by the following principle:
as shown in fig. 2, when the water heater is in a closed state, that is, the living water is in a closed state, at this time, water pressure exists in the water pipe, the movable membrane in the switch mechanism 3 deforms along with the pressure difference between the inside and the outside of the water pipe to generate deviation, and at this time, the movable membrane bulges outwards along the water pipe to drive the connecting piece 8 to move; the conductive contact arranged on the connecting rod 10 of the connecting piece 8 and the conductive contact arranged on the cross rod 11 are respectively contacted with two electrode plates in the switch assembly 4 to realize the contact conduction between the two electrode plates, so that the anode rod detection circuit 2 is respectively electrically connected with the control module 1 and an anode rod arranged in the water heater to be communicated to form a whole induction loop; the driving signal output end of the single chip microcomputer outputs high level, so that the triode Q1 and the triode Q2 are both conducted, the voltage of a power supply end VCC is applied to two ends of the anode bar, and meanwhile, the signal input end of the single chip microcomputer detects the current of parts connected to the outside of two ends of the anode bar through the sampling resistor R1 to the ground. If the current detected by the singlechip is less than X, the driving signal output end of the singlechip continues to output high level; if the current detected by the singlechip is greater than or equal to X, the driving signal output end of the singlechip outputs low level to cut off the triode Q1 and the triode Q2, and at the moment, no voltage exists at two ends of the anode rod, and an alarm signal for replacing the anode rod is sent out.
As shown in fig. 3, when the water heater is in a working state, i.e. the living water is in an open state, the pressure in the water pipe is equal to the atmospheric pressure, the acting forces inside and outside the movable membrane in the switch mechanism 3 are equal, and the movable membrane returns to an initial state; at this time, the connecting rod 10 connected to the movable membrane naturally falls down, so that the connecting member 8 is separated from the two electrode plates of the switch assembly 4, and the whole induction loop is cut off, so that no induced current exists in the induction loop, that is, the anode rod detection circuit 2 stops the consumption detection of the anode rod.
In the embodiment, a switch mechanism is arranged in the anode rod detection circuit, and the switch mechanism is closed and opened along with the deformation of the pressure difference between the inside and the outside of the water pipe according to an elastic sealing piece arranged inside; when the switch mechanism is closed, the control module controls the anode rod detection circuit to open and detect the consumption of the anode rods; when this on-off mechanism disconnection, then detection device stops to detect, through the aforesaid setting for the water heater can avoid the electrically conductive danger of rivers in the use, and the water heater does not influence the normal detection to the anode rod at the in-process that does not use simultaneously, has utilized the hydraulic pressure change in the water pipe to realize the control to detection circuitry on the anode rod promptly, has guaranteed the reliability of water heater operation.
Example 3
The water heater provided by the embodiment comprises the anode rod detection device for the water heater in the embodiment 2.
In particular, the water heater of the present embodiment is a gas water heater. Alternatively, the present invention may be applied to an electric water heater.
As shown in fig. 6, the water heater includes a metal case allowing fluid to flow therethrough and an anode rod 13 provided in the metal case, and the metal case and the anode rod 13 are connected through an electric circuit. Specifically, in this embodiment, the metal shell is a metal water pipe in a heat exchanger in the water heater. In other embodiments, the metal shell can also be a metal liner of a water heater and the like.
The anode rod 13 is generally a magnesium rod and is used for preventing the corrosion of the metal liner and softening the water quality.
The metal water pipe and the anode rod 13 form a galvanic cell, the anode rod 13 is an anode of the cell, and the metal water pipe is a cathode of the cell, and the metal water pipe as the cathode is prevented from being corroded by preferentially consuming the anode rod 13 as the anode.
Optionally, the inner wall surface of the metal water pipe is provided with an enamel coating, in the case that the enamel coating is complete, the circuit conduction between the anode rod 13 and the metal water pipe cannot be realized, but when the enamel coating is cracked locally, the metal surface of the metal water pipe is in contact with a fluid (generally, tap water, which has a small amount of free metal ions in the tap water and makes the tap water conductive), the resistance between the metal water pipe and the anode rod 13 becomes small, the circuit conduction is formed between the metal water pipe and the anode rod 13, and the anode rod 13 outputs current to form a polarization film on the exposed metal surface of the metal water pipe, so that the damaged enamel is repaired, and the metal water pipe is prevented from being corroded.
The switch mechanism in the detection device is arranged at the position B of the water heater, the terminal A in fig. 6 is the terminal A connected with the anode rod detection circuit in fig. 5, and the detection circuit is connected with the anode rod based on the terminal A so as to detect the consumption of the anode rod after the switch mechanism is closed.
The water heater in the embodiment can effectively prevent the water channel system from working with electricity in time by arranging the detection device for the consumption of the magnesium rod, thereby improving the operation safety of the water heater and improving the use experience of users; meanwhile, the anode rod detection circuit improves the detection precision of the consumption of the magnesium rod, and effectively avoids the corrosion of the heat exchanger, thereby prolonging the service life of the gas water heater.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (16)
1. An anode rod detection device for a water heater is characterized by comprising a control module, an anode rod detection circuit and a switch mechanism, wherein the switch mechanism is arranged in the anode rod detection circuit;
the switch mechanism is used for switching on and switching off according to the hydraulic pressure change in a water pipe of the water heater;
when the switch mechanism is closed, the anode rod detection circuit is respectively electrically connected with the control module and an anode rod arranged in the water heater, and the control module is used for generating a control signal to control the anode rod detection circuit to be opened and detected, so that the consumption of the anode rod is detected.
2. An anode rod sensing device for a water heater as defined in claim 1, wherein said switching mechanism includes a switching assembly and a power assembly;
the power assembly is used for driving the switch assembly to be switched on and switched off according to the hydraulic pressure change in the water pipe of the water heater.
3. An anode rod sensing device for a water heater as set forth in claim 2, wherein the switch assembly includes two connection terminals provided separately from each other;
the power assembly comprises a connecting piece and an elastic sealing piece;
one end of the connecting piece is connected to the elastic sealing piece, and the other end of the connecting piece is provided with a wiring terminal for electrically connecting the two connecting ends;
the elastic sealing element is arranged at the opening of the water pipe of the water heater in a liquid-tight manner and deforms according to the pressure difference between the inside and the outside of the water pipe to drive the connecting piece to contact with and be away from the two connecting ends.
4. An anode rod sensing device for a water heater as defined in claim 3, wherein said resilient seal is a removable membrane.
5. An anode rod detecting device for a water heater as claimed in claim 3, wherein said elastic sealing member is liquid-tightly provided at the opening of said water pipe by a fixing member.
6. An anode rod sensing device for a water heater as set forth in claim 5, wherein said fixing member includes a fixing ring.
7. An anode rod sensing device for a water heater as claimed in claim 3, wherein the connection terminal includes an electrode tab;
the connecting piece comprises a connecting rod and a cross rod perpendicular to the connecting rod;
the end part of the connecting rod, far away from the elastic sealing element, and the cross rod are respectively provided with the connecting terminal so as to be in contact with the two electrode plates for conducting electricity, and each connecting terminal comprises at least one conducting contact;
the connecting rod with the horizontal pole be connected with between the binding post set up in connecting piece inside connecting wire.
8. An anode rod detecting device for a water heater as claimed in claim 1, wherein the water pipe is a water inlet pipe or a water outlet pipe of the water heater.
9. An anode rod sensing device for a water heater as claimed in claim 3, wherein said connecting member and said connecting end are provided outside said water pipe.
10. An anode rod detection device for a water heater as claimed in claim 1, wherein said anode rod detection circuit is configured to output an electrical signal based on said control signal and send it to said control module, said control module is configured to generate a detection result characterizing consumption of said anode rod based on said electrical signal.
11. An anode rod detection device for a water heater as claimed in claim 10, wherein said control module is further configured to determine whether said electrical signal reaches a set threshold, and if so, to generate an alarm signal for replacing said anode rod; and/or controlling the anode bar detection circuit to stop detection.
12. An anode rod sensing device for a water heater as defined in claim 11, wherein said anode rod sensing circuit includes a switch control circuit and a first resistor;
the input end of the switch control circuit is electrically connected with the driving signal output end of the control module, the first connecting end and the second connecting end of the switch control circuit are respectively and electrically connected with two ends of the anode bar, the output end of the switch control circuit is respectively and electrically connected with one end of the first resistor and the signal input end of the control module, and the other end of the first resistor is grounded;
wherein the electrical signal is a voltage signal;
the control module is used for calculating a current value in the anode bar according to the voltage signal and the resistance value of the first resistor, judging whether the current value is smaller than the set threshold value or not, and if yes, generating an alarm signal for replacing the anode bar.
13. An anode rod sensing device for a water heater as defined in claim 12, wherein said switching control circuit includes a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, a first capacitor and a second capacitor;
one end of the second resistor is electrically connected with a driving signal output end of the control module, the other end of the second resistor is respectively electrically connected with a base electrode of the first transistor and one end of the third resistor, and the other end of the third resistor is electrically connected with one end of the first resistor; one end of the fourth resistor is electrically connected with a power supply end, the other end of the fourth resistor is electrically connected with one end of the first capacitor, one end of the second capacitor and one end of the anode bar respectively, the other end of the first capacitor is electrically connected with the collector electrode of the first transistor, the collector electrode of the second transistor, the other end of the second capacitor and the other end of the anode bar respectively, the emitter electrode of the first transistor is electrically connected with the base electrode of the second transistor, and the emitter electrode of the second transistor is electrically connected with one end of the first resistor and the signal input end of the control module respectively.
14. An anode rod sensing device for a water heater as defined in claim 13, wherein said anode rod sensing circuit further comprises a fifth resistor, a sixth resistor, a third capacitor and a diode;
one end of the fifth resistor is electrically connected with one end of the first resistor, the other end of the fifth resistor is electrically connected with one end of the sixth resistor, one end of the third capacitor and the anode of the diode respectively, the cathode of the diode is electrically connected with an external power supply, and the other end of the sixth resistor and the other end of the third capacitor are grounded.
15. An anode rod sensing device for a water heater as claimed in claim 13 or 14, wherein said first transistor and said second transistor are both NPN transistors; and/or the first capacitor comprises an electrolytic capacitor.
16. A water heater comprising an anode rod sensing device for a water heater as claimed in any one of claims 1 to 15.
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| CN202011051641.1A CN112213360B (en) | 2020-09-29 | 2020-09-29 | Anode rod detection device for water heater and water heater |
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| CN202011051641.1A CN112213360B (en) | 2020-09-29 | 2020-09-29 | Anode rod detection device for water heater and water heater |
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