Power supply communication multiplexing circuit of water heater and shower head

Abstract

The utility model discloses a power supply communication multiplexing circuit for a water heater and a shower head. The power supply communication multiplexing circuit comprises a first control module and a first communication module which are arranged on the water heater, and a bridge rectifier module, an energy storage capacitor, a second communication module, a power supply conversion module, a second control module and a display module which are arranged on the shower head, the first control module is connected with the first communication module, the first communication module is connected with the input end of the bridge rectifier module, the positive output end of the bridge rectifier module is connected with the input ends of the second communication module, the energy storage capacitor and the power conversion module, and the second communication module and the display module are connected with the second control module. The output end of the power conversion module is connected with the second communication module, the second control module and the display module. According to the utility model, data communication between the water heater and the shower head can be realized, power can be supplied to the circuit module of the shower head, and convenience is brought to users.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a power supply and communication multiplexing circuit for a water heater and a shower. Background Art

[0002] Water heaters are a common household appliance in daily life, which can provide household users with the required hot water. At present, most water heaters are installed outside the bathroom. When users need to adjust the water temperature during bathing, they must go to the water heater, which undoubtedly brings inconvenience to users.

[0003] To this end, the prior art has also developed a water heater in which buttons and a display are set on the shower head, and the shower head can communicate with the water heater. The display can show information such as temperature, and the user can control the water heater to change the water temperature or execute other instructions by operating the buttons.

[0004] For example, Chinese utility model patent with publication number CN104792022A discloses a similar water heater. However, in the patent document, each circuit module inside the shower head needs to be powered by an independent power supply. Once the power of the power supply is exhausted, the circuit modules of the shower head will not work, which requires users to frequently replace batteries, which will undoubtedly cause inconvenience in use. Utility Model Content

[0005] The utility model provides a power supply communication multiplexing circuit for a water heater and a shower head, which can not only realize data communication between the water heater and the shower head, but also supply power to a circuit module of the shower head, thus facilitating use by users.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] An embodiment of the utility model provides a power supply communication multiplexing circuit for a water heater and a shower, comprising a first control module and a first communication module arranged on the water heater, and a bridge rectifier module, an energy storage capacitor, a second communication module, a power conversion module, a second control module and a display module arranged on the shower; the first control module is connected to the first communication module, the first communication module is connected to the input end of the bridge rectifier module, the positive output end of the bridge rectifier module is connected to the second communication module, the energy storage capacitor and the input end of the power conversion module, the second communication module and the display module are both connected to the second control module, the output end of the power conversion module is respectively connected to the second communication module, the second control module and the display module, and the power conversion module is used to convert the voltage of its input end into the working voltage required by the second communication module, the second control module and the display module so that the second communication module, the second control module and the display module are powered on and work.

[0008] In some embodiments, the first communication module includes a first transmitting end, a first receiving end, a first switch module, a second switch module, a third switch module, a fourth switch module and a fifth switch module; the first transmitting end and the first receiving end are both connected to the first control module, the first switch module, the second switch module, the third switch module, the fourth switch module and the fifth switch module each include two connecting ends and one control end, and the two connecting ends of the first switch module, the second switch module, the third switch module, the fourth switch module and the fifth switch module are both connected or disconnected according to the level signal of the respective control ends;

[0009] The first transmitting end is connected to the control end of the first switch module, one connection end of the first switch module is connected to the DC power supply, and the other connection end is grounded; the connection end of the first switch module connected to the DC power supply is connected to the control end of the second switch module, the control end of the second switch module is connected to the control end of the third switch module, one connection end of the second switch module is connected to the DC power supply, and the other connection end is connected to a connection end of the third switch module, the other connection end of the third switch module is grounded, the connection end of the third switch module connected to the second switch module is connected to the positive input end of the bridge rectifier module, and the negative input end of the bridge rectifier module is grounded; when the level signals of the control ends are the same, the conduction states of the two connection ends of the second switch module are opposite to the conduction states of the two connection ends of the third switch module;

[0010] One connection end of the fourth switch module is connected to a DC power supply, and the other connection end is connected to a control end of the fifth switch module, and the control end of the fourth switch module is connected to a positive input end of a bridge rectifier module; one connection end of the fifth switch module is connected to a DC power supply, and the other connection end is grounded, and the first receiving end is connected to a connection end of the fifth switch module connected to a DC power supply.

[0011] In some embodiments, the first communication module also includes a constant current module connected in series between the connection end of the second switch module and the DC power supply, the constant current module includes a third transistor, an eleventh transistor, a sixth resistor, a seventh resistor, an eighth resistor and a fifteenth resistor, the third transistor and the eleventh transistor are both N-type transistors; the DC power supply, the sixth resistor, the fifteenth resistor and the grounding end are connected in sequence, the end of the sixth resistor connected to the fifteenth resistor is also connected to the base of the third transistor, the DC power supply, the seventh resistor and the emitter of the eleventh transistor are connected in sequence, the collector of the eleventh transistor is connected to the base of the third transistor, the DC power supply, the eighth resistor and the emitter of the third transistor are connected in sequence, the base of the eleventh transistor is connected to the emitter of the third transistor, and the collector of the third transistor is connected to the connection end of the second switch module.

[0012] In some embodiments, the first communication module also includes a thirteenth transistor, a ninth resistor, a tenth resistor, an eleventh resistor and a seventeenth resistor, and the fourth switch module includes a twelfth transistor, and the twelfth transistor and the thirteenth transistor are both N-type transistors; the DC power supply, the ninth resistor, the seventeenth resistor and the ground terminal are connected in sequence, the end of the ninth resistor connected to the seventeenth resistor is connected to the base of the thirteenth transistor, the DC power supply, the tenth resistor are connected to the emitter of the thirteenth transistor, the collector of the thirteenth transistor is grounded, the emitter of the twelfth transistor is connected to the emitter of the thirteenth transistor, the collector of the twelfth transistor is connected to the eighteenth resistor, and the base of the twelfth transistor, the eleventh resistor and the positive input terminal of the bridge rectifier module are connected in sequence.

[0013] In some embodiments, the second communication module includes a second transmitting end, a second receiving end, a sixth switch module and a seventh switch module; the second transmitting end and the second receiving end are both connected to the second control module, the sixth switch module and the seventh switch module each include two connecting ends and a control end, and the two connecting ends of the sixth switch module and the seventh switch module are both connected or disconnected according to the level signal of the respective control ends;

[0014] One connection end of the sixth switch module is connected to the forward output end of the bridge rectifier module, the other connection end is grounded, and the control end of the sixth switch module is connected to the second transmitting end;

[0015] The control end of the seventh switch module is connected to the forward output end of the bridge rectifier module, one connection end of the seventh switch module is connected to the output end of the power conversion module, the other connection end is grounded, and the connection end of the seventh switch module connected to the output end of the power conversion module is connected to the second receiving end.

[0016] In some embodiments, the sixth switch module includes a twenty-third transistor, a twenty-fourth transistor, a tenth resistor and a twentieth resistor, the twenty-third transistor is a P-type transistor, and the twenty-fourth transistor is an N-type transistor; the emitter and the collector of the twenty-third transistor are respectively two connection ends of the sixth switch module, and the base of the twenty-fourth transistor is the control end of the sixth switch module; the output end of the power conversion module is connected to the emitter of the twenty-fourth transistor, the base of the twenty-fourth transistor, the twentieth resistor and the second transmitting end are connected in sequence, and the collector of the twenty-fourth transistor, the tenth resistor and the base of the twenty-third transistor are connected in sequence; the forward output end of the bridge rectifier module is connected to the collector of the twenty-third transistor, and the emitter of the twenty-third transistor is grounded.

[0017] In some embodiments, the seventh switch module includes a voltage regulator, a fifth resistor, a sixth resistor, a seventh resistor, a ninth resistor, a sixteenth resistor, a first transistor and a second transistor, wherein the first transistor and the second transistor are both P-type transistors; the forward output end, the voltage regulator, the fifth resistor, the ninth resistor and the ground end of the bridge rectifier module are connected in sequence, one end of the fifth resistor connected to the voltage regulator is connected to one end of the sixteenth resistor, the other end of the sixteenth resistor is grounded, and one end of the fifth resistor connected to the ninth resistor is connected to the base of the first transistor; the output end of the power conversion module, the sixth resistor and the collector of the first transistor are connected in sequence, and the emitter of the first transistor is grounded; the output end of the power conversion module, the seventh resistor and the collector of the second transistor are connected in sequence, the base of the second transistor is connected to the collector of the first transistor, the emitter of the second transistor is grounded, and the second receiving end is connected to the collector of the second transistor.

[0018] In some embodiments, a unidirectional conducting device is connected in series between the connection node between the second communication module and the output end of the bridge rectifier module and the energy storage capacitor, and the unidirectional conducting device conducts unidirectionally from the connection node between the second communication module and the output end of the bridge rectifier module to the energy storage capacitor.

[0019] In some embodiments, the display module includes a driving module and a display screen, the second control module, the driving module and the display screen are connected in sequence, and the output end of the power conversion module is connected to the driving module.

[0020] In some embodiments, a plurality of key modules are further included, and the key modules are connected to the second control module.

[0021] The utility model has at least the following beneficial effects: the water heater and the shower head of the utility model can realize data communication between each other through signal transmission between the first communication module, the bridge rectifier module and the second communication module; at the same time, when the first communication module outputs a high voltage signal, the positive output end of the bridge rectifier module charges the energy storage capacitor, and the power conversion module can convert the voltage of the positive output end of the bridge rectifier module into the working voltage required by the second communication module, the second control module and the display module, and the second communication module, the second control module and the display module can be powered on and work; when the first communication module outputs a low voltage signal, the energy storage capacitor can be discharged to the input end of the power conversion module, so that the output end of the power conversion module can still output the working voltage required by the second communication module, the second control module and the display module, and the second communication module, the second control module and the display module can still be powered on and work; therefore, the utility model can realize data communication between the water heater and the shower head through the same communication interface, and can also supply power to the circuit module of the shower head, without the need to configure a battery for the shower head, thus eliminating the trouble of frequent battery replacement and facilitating user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a circuit module of a power supply and communication multiplexing circuit for a water heater and a shower head according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the circuit structure of a first communication module according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the circuit structure of a first control module of an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the circuit structure of a bridge rectifier module, an energy storage capacitor, a second communication module and a power conversion module in one embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the circuit structure of a second control module of an embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the circuit structure of a driving module according to an embodiment of the utility model;

[0028] Figure 7 The present invention is a schematic diagram of a circuit structure of a display screen according to an embodiment of the present invention.

[0029] Wherein, the accompanying drawings are marked as follows:

[0030] A first control module 100, a first communication module 200, a first switch module 210, a second switch module 220, a third switch module 230, a fourth switch module 240, a fifth switch module 250, a bridge rectifier module 300, a storage capacitor 400, a second communication module 500, a sixth switch module 510, a seventh switch module 520, a power conversion module 600, a second control module 700, and a display module 800. DETAILED DESCRIPTION

[0031] The utility model provides the following description with reference to the accompanying drawings to help fully understand the various embodiments of the utility model as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the utility model.

[0032] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] It will be understood that when one element (eg, a first element) is “connected” to another element (eg, a second element), the element may be directly connected to the other element or an intervening element (eg, a third element) may be present between the element and the other element.

[0034] The embodiment of the utility model provides a power supply communication multiplexing circuit for a water heater and a shower head, such as Figure 1 As shown, it includes a first control module 100 and a first communication module 200 arranged on the water heater, and a bridge rectifier module 300, a storage capacitor 400, a second communication module 500, a power conversion module 600, a second control module 700 and a display module 800 arranged on the shower. The first control module 100 can be the main control module of the water heater, which is used to control the water heater to work and adjust the working state and / or working parameters of the water heater. The first control module 100 is connected to the first communication module 200, and the first control module 100 sends and receives communication data through the first communication module 200.

[0035] The first communication module 200 is connected to the input end of the bridge rectifier module 300, and the positive output end of the bridge rectifier module 300 is connected to the input end of the second communication module 500, the energy storage capacitor 400 and the power conversion module 600. The second communication module 500 and the display module 800 are both connected to the second control module 700. The water heater and the shower head can realize data communication with each other through the signal transmission between the first communication module 200, the bridge rectifier module 300 and the second communication module 500. The display module 800 can display information such as the menu, the working status of the water heater and / or the working parameters of the water heater. The display module 800 can be used only for displaying information, or it can display information and have a touch function to form a touch display module for users to input information and facilitate human-computer interaction.

[0036] The output end of the power conversion module 600 is respectively connected to the second communication module 500, the second control module 700 and the display module 800. The power conversion module 600 is used to convert the voltage, specifically converting the voltage at its input end into the working voltage required by the second communication module 500, the second control module 700 and the display module 800 so that the second communication module 500, the second control module 700 and the display module 800 are powered on and work. The working voltages required by the second communication module 500, the second control module 700 and the display module 800 may be all the same, partially the same or all different, so that the power conversion module 600 can perform one or more voltage conversions, or the power conversion module 600 may have multiple output ends to output the working voltages required by the second communication module 500, the second control module 700 and the display module 800 respectively.

[0037] When the first communication module 200 outputs a high voltage signal, the positive output end of the bridge rectifier module 300 charges the energy storage capacitor 400, and the power conversion module 600 can convert the voltage of the positive output end of the bridge rectifier module 300 into the working voltage required by the second communication module 500, the second control module 700 and the display module 800, and the second communication module 500, the second control module 700 and the display module 800 can be powered on and work; when the first communication module 200 outputs a low voltage signal, the energy storage capacitor 400 can discharge to the input end of the power conversion module 600, and the energy storage capacitor 400 is used for power supply, and the output end of the power conversion module 600 can still output the working voltage required by the second communication module 500, the second control module 700 and the display module 800, and the second communication module 500, the second control module 700 and the display module 800 can still be powered on and work.

[0038] Therefore, this embodiment can realize data communication between the water heater and the shower head through the same communication interface, and can also supply power to the circuit module of the shower head, without the need to configure a battery for the shower head, thus eliminating the trouble of frequent battery replacement and facilitating user use.

[0039] In some embodiments, Figure 2As shown, the first communication module includes a first transmitting end TX1, a first receiving end RX1, a first switch module 210, a second switch module 220, a third switch module 230, a fourth switch module 240 and a fifth switch module 250. The first transmitting end and the first receiving end are both connected to the first control module, and the communication signal to be sent by the first control module is sent through the first transmitting end, and the communication signal to be received by the first control module is received through the first receiving end. The first switch module 210, the second switch module 220, the third switch module 230, the fourth switch module 240 and the fifth switch module 250 each include two connection terminals and a control terminal. The two connection terminals of the first switch module 210, the second switch module 220, the third switch module 230, the fourth switch module 240 and the fifth switch module 250 are connected or disconnected according to the level signal of the respective control terminals. Specifically, it can be set that when the control terminal is a high level signal, the two connection terminals are disconnected, and when the control terminal is a low level signal, the two connection terminals are connected, or when the control terminal is a high level signal, the two connection terminals are connected, and when the control terminal is a low level signal, the two connection terminals are disconnected. The first switch module 210, the second switch module 220, the third switch module 230, the fourth switch module 240 and the fifth switch module 250 may include one or more transistors, MOS tubes or IGBTs. It should be noted that, in order to ensure that the input voltage or current of the connection end or the control end is within a safe range, the connection end and / or the control end may be connected to protective devices such as a voltage divider resistor and a current limiting resistor.

[0040] The first transmitting terminal TX1 is connected to the control terminal of the first switch module 210, one connection terminal of the first switch module 210 is connected to the DC power supply, and the other connection terminal is grounded; the connection terminal of the first switch module 210 connected to the DC power supply is connected to the control terminal of the second switch module 220, the control terminal of the second switch module 220 is connected to the control terminal of the third switch module 230, one connection terminal of the second switch module 220 is connected to the DC power supply, and the other connection terminal is connected to a connection terminal of the third switch module 230, the other connection terminal of the third switch module 230 is grounded, and the connection terminal of the third switch module 230 connected to the second switch module 220 is connected to the DC power supply. The connecting end of the second switch module 220 is connected to the positive input end of the bridge rectifier module, and the negative input end of the bridge rectifier module is grounded; when the level signal of the control end is the same, the conduction state of the two connecting ends of the second switch module 220 is opposite to the conduction state of the two connecting ends of the third switch module 230, that is, when the control ends of the second switch module 220 and the third switch module 230 are the same level signal, the two connecting ends of the second switch module 220 are connected, and the two connecting ends of the third switch module 230 are disconnected, or the two connecting ends of the second switch module 220 are disconnected, and the two connecting ends of the third switch module 230 are connected. Only in this way can the voltage signal of the positive input end of the bridge rectifier module change according to the level signal of the first sending end, otherwise, if the conduction state of the two connecting ends of the second switch module 220 is the same as the conduction state of the two connecting ends of the third switch module 230, the positive input end of the bridge rectifier module will always be in a low voltage signal state.

[0041] One connection end of the fourth switch module 240 is connected to the DC power supply, and the other connection end is connected to the control end of the fifth switch module 250, and the control end of the fourth switch module 240 is connected to the positive input end of the bridge rectifier module; one connection end of the fifth switch module 250 is connected to the DC power supply, and the other connection end is grounded, and the first receiving end RX1 is connected to the connection end of the fifth switch module 250 connected to the DC power supply.

[0042] In this embodiment, a plurality of switch modules are used to change the voltage signal at the positive input end of the bridge rectifier module according to the level signal at the first transmitting end, so as to realize data transmission. At the same time, the first receiving end also changes according to the voltage signal at the positive input end of the bridge rectifier module, so as to realize data reception. Since the level signal can be set manually, in this embodiment, the level signal at the first transmitting end can be set to be the same as the level signal received by the second control module, or the level signal at the first transmitting end can be set to be different from the level signal received by the second control module. Similarly, the level signal at the first receiving end can be set to be the same as the level signal sent by the second control module, or the level signal at the first receiving end can be set to be different from the level signal sent by the second control module.

[0043] It should be noted that the first communication module of this embodiment can be directly connected to the input end of the bridge rectifier module on the shower head through a wire, or can be connected by an interface plug-in method, for example Figure 2 As shown, the connection end of the third switch module 230 connected to the second switch module 220 is connected to the 1st pin of the interface CN1, and the 2nd pin of the interface CN1 is grounded. Figure 4 As shown, the positive input end of the bridge rectifier module is connected to pin 1 of the interface CN1, and the negative input end of the bridge rectifier module is connected to pin 2 of the interface CN1, thereby realizing the connection between the first communication module and the bridge rectifier module, which is more convenient.

[0044] In some embodiments, Figure 2 As shown, the first switch module 210 includes a seventh transistor Q7, an eighth transistor Q8, a resistor R16, a resistor R20 and a resistor R21, and the seventh transistor Q7 and the eighth transistor Q8 can both be P-type transistors. The base of the eighth transistor Q8 forms the control end of the first switch module 210, and the collector and emitter of the seventh transistor Q7 are respectively two connection ends of the first switch module 210. The first transmitting end, the resistor R16 and the base of the eighth transistor are connected in sequence, the DC power supply, the resistor R21 and the collector of the eighth transistor are connected in sequence, the emitter of the eighth transistor is grounded, and the two ends of the resistor R20 are respectively connected to the base and emitter of the eighth transistor. The base of the seventh transistor is connected to the collector of the eighth transistor, the collector of the seventh transistor Q7 is connected to the DC power supply through the resistor R5, and the emitter of the seventh transistor Q7 is grounded.

[0045] When the first transmitting end TX1 sends a high level signal, the eighth transistor Q8 is turned on, the seventh transistor Q7 is turned off, and the control end of the third switch module 230 and the second switch module 220 inputs a high level signal; when the first transmitting end TX1 sends a low level signal, the eighth transistor Q8 is turned off, the seventh transistor Q7 is turned on, and the control end of the third switch module 230 and the second switch module 220 inputs a low level signal.

[0046] In some embodiments, Figure 2As shown, the second switch module 220 includes a fourth transistor Q4 and a fifth transistor Q5, both of which are P-type transistors, and the third switch module 230 includes a fourteenth transistor Q2B, which is an N-type transistor. The base of the fourth transistor, the resistor R13 and the connection end of the first switch module 210 connected to the DC power supply are connected, the base of the fourth transistor is the control end of the second switch module 220, the emitter of the fourth transistor is connected to the collector of the fifth transistor, the collector of the fifth transistor is connected to the DC power supply, the base of the fifth transistor is connected to the emitter of the fourth transistor, the emitter of the fourth transistor is connected to the emitter of the fourteenth transistor Q2B, and the collector and emitter of the fifth transistor are respectively two connection ends of the second switch module 220.

[0047] The base of the fourteenth transistor Q2B is connected to the base of the fourth transistor Q4, the collector of the fourteenth transistor Q2B is grounded, and the emitter of the fourteenth transistor Q2B is connected to the positive input end of the bridge rectifier module. The base of the fourteenth transistor Q2B is the control end of the third switch module 230, and the collector and emitter of the fourteenth transistor Q2B are two connection ends of the third switch module 230.

[0048] When the two connection ends of the first switch module 210 are turned on, the fourth transistor Q4 and the fifth transistor Q5 are both turned off, the fourteenth transistor Q2B is turned on, and the positive input end of the bridge rectifier module is a low level signal. When the two connection ends of the first switch module 210 are disconnected, the fourth transistor Q4 and the fifth transistor Q5 are both turned on, the fourteenth transistor Q2B is turned off, and the positive input end of the bridge rectifier module is a high level signal.

[0049] The base and collector of the fourteenth transistor Q2B may be connected to two ends of a filter capacitor C5 respectively, and the filter capacitor is used for filtering.

[0050] In some embodiments, Figure 2As shown, the fourth switch module 240 includes a twelfth transistor Q1B, the twelfth transistor Q1B is an N-type transistor, the base of the twelfth transistor Q1B is the control end of the fourth switch module 240, and the collector and emitter of the twelfth transistor Q1B are two connection ends of the fourth switch module 240. The emitter of the twelfth transistor Q1B, the resistor R10 and the DC power supply are connected in sequence, the collector of the twelfth transistor Q1B is connected to the control end of the fifth switch module 250, and the base of the twelfth transistor Q1B, the resistor R11 and the positive input end of the bridge rectifier module are connected in sequence. When the positive input end of the bridge rectifier module is a high-level signal, the twelfth transistor Q1B is turned off, and the control end of the fifth switch module 250 is a low-level signal. When the positive input end of the bridge rectifier module is a low-level signal, the twelfth transistor Q1B is turned on, and the control end of the fifth switch module 250 is a high-level signal.

[0051] Furthermore, the first communication module also includes a thirteenth transistor Q2A, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11 and a seventeenth resistor R17, the thirteenth transistor is an N-type transistor; a DC power supply, a ninth resistor, a seventeenth resistor and a ground terminal are connected in sequence, one end of the ninth resistor connected to the seventeenth resistor is connected to the base of the thirteenth transistor, the DC power supply, the tenth resistor are connected to the emitter of the thirteenth transistor, the collector of the thirteenth transistor is grounded, and the emitter of the twelfth transistor is connected to the emitter of the thirteenth transistor. The thirteenth transistor Q2A and the twelfth transistor Q1B form a differential circuit, which also protects the circuit.

[0052] In some embodiments, Figure 2 As shown, the fifth switch module 250 includes a sixth transistor Q6, a resistor R14 and a resistor R19, the sixth transistor Q6 is a P-type transistor, the base of the sixth transistor Q6 is the control terminal of the fifth switch module 250, and the collector and emitter of the sixth transistor Q6 are respectively two connection terminals of the fifth switch module 250. One connection terminal of the fourth switch module 240, the resistor R14 and the base of the sixth transistor Q6 are connected in sequence, the base of the sixth transistor Q6, the resistor R19 and the ground terminal are connected in sequence, the collector of the sixth transistor Q6, the resistor R12 and the DC power supply are connected in sequence, the first receiving terminal is connected to the collector of the sixth transistor Q6, and the emitter of the sixth transistor Q6 is grounded.

[0053] When the two connection ends of the fourth switch module 240 are turned on, the sixth transistor Q6 is turned on, and the first receiving end is at a low level. When the two connection ends of the fourth switch module 240 are disconnected, the sixth transistor Q6 is turned off, and the first receiving end is at a high level.

[0054] Among them, the connection end of the fourth switch module 240, the resistor R18 and the ground end are connected in sequence, one end of the resistor R14 is connected to the connection end of the fourth switch module 240 connected to the resistor R18, and the other end of the resistor R14 is connected to the base of the sixth transistor Q6.

[0055] In some embodiments, Figure 2 As shown, the first communication module also includes a constant current module connected in series between the connection end of the second switch module 220 and the DC power supply, and the constant current module includes a third transistor Q3, an eleventh transistor Q1A, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a fifteenth resistor R15, and the third transistor and the eleventh transistor are both N-type transistors. The DC power supply, the sixth resistor, the fifteenth resistor and the grounding end are connected in sequence, and one end of the sixth resistor connected to the fifteenth resistor is also connected to the base of the third transistor, the DC power supply, the seventh resistor and the emitter of the eleventh transistor are connected in sequence, and the collector of the eleventh transistor is connected to the base of the third transistor, the DC power supply, the eighth resistor and the emitter of the third transistor are connected in sequence, and the base of the eleventh transistor is connected to the emitter of the third transistor, and the collector of the third transistor is connected to the connection end of the second switch module.

[0056] The collector of the third transistor Q3 outputs a constant current signal as a constant current source at the positive input end of the bridge rectifier module to provide a constant current to the positive input end of the bridge rectifier module to provide sufficient current for the shower head. When the positive output end of the bridge rectifier module is grounded, the 12-15V DC power supply can also be prevented from being short-circuited.

[0057] In some embodiments, Figure 3 As shown, the first control module includes a chip MC96F6432Q, pin 3 of the chip MC96F6432Q is connected to the first transmitting end, and pin 2 of the chip MC96F6432Q is connected to the first receiving end.

[0058] In some embodiments, Figure 4As shown, the second communication module includes a second transmitting end TXD, a second receiving end RXD, a sixth switch module 510 and a seventh switch module 520. The second transmitting end and the second receiving end are both connected to the second control module, and the second control module sends a communication signal through the second transmitting end and receives the communication signal through the second receiving end. The sixth switch module 510 and the seventh switch module 520 each include two connecting ends and a control end, and the two connecting ends of the sixth switch module 510 and the seventh switch module 520 are both connected or disconnected according to the level signal of the respective control ends. Specifically, it can be set that when the control end is a high level signal, the two connecting ends are disconnected, and when the control end is a low level signal, the two connecting ends are connected, or when the control end is a high level signal, the two connecting ends are connected, and when the control end is a low level signal, the two connecting ends are disconnected. The sixth switch module 510 and the seventh switch module 520 may include one or more transistors, MOS tubes or IGBTs. It should be noted that, in order to ensure that the input voltage or current of the connection end or the control end is within a safe range, the connection end and / or the control end may be connected to protective devices such as a voltage divider resistor and a current limiting resistor.

[0059] The bridge rectifier module includes a diode D3, a diode D4, a diode D5 and a diode D6. One connection end of the sixth switch module 510 is connected to the forward output end of the bridge rectifier module, and the other connection end is grounded. The control end of the sixth switch module 510 is connected to the second transmitting end. After the high and low level signals sent by the first communication module pass through the bridge rectifier module, the second communication module can receive the corresponding high and low level signals, thereby realizing the transmission of data from the water heater to the shower. However, due to the unidirectional conduction characteristics of the bridge rectifier module, the high level signal sent by the second communication module cannot be directly transmitted to the first communication module. Therefore, when the shower wants to transmit data to the water heater through the second communication module, the first communication module can be set so that the forward input end of the bridge rectifier module is in a high level signal state by default. Once the two connection ends of the sixth switch module 510 are turned on, the forward input end of the bridge rectifier module is grounded, thereby changing to a low level signal. The first communication module receives the level signal of the forward input end of the bridge rectifier module, thereby realizing the shower sending communication data to the water heater.

[0060] The control end of the seventh switch module 520 is connected to the forward output end of the bridge rectifier module, one connection end of the seventh switch module 520 is connected to the output end of the power conversion module 600, and the other connection end is grounded, and the connection end of the seventh switch module 520 connected to the output end of the power conversion module 600 is connected to the second receiving end RXD. Figure 4The 5V voltage in is provided by the power conversion module 600. The voltage signal at the positive output end of the bridge rectifier module changes the conduction state of the seventh switch module 520, thereby changing the level signal of the second receiving end RXD, so that the shower head receives the communication data sent by the water heater.

[0061] Further, the sixth switch module 510 includes a twenty-third transistor Q23, a twenty-fourth transistor Q24, a tenth resistor R10 and a twentieth resistor R20, the twenty-third transistor is a P-type transistor, and the twenty-fourth transistor is an N-type transistor. The emitter and collector of the twenty-third transistor are respectively two connection ends of the sixth switch module 510, and the base of the twenty-fourth transistor is the control end of the sixth switch module 510; the output end of the power conversion module 600 is connected to the emitter of the twenty-fourth transistor, the base of the twenty-fourth transistor, the twentieth resistor and the second transmitting end are connected in sequence, and the collector of the twenty-fourth transistor, the tenth resistor and the base of the twenty-third transistor are connected in sequence; the forward output end of the bridge rectifier module is connected to the collector of the twenty-third transistor, and the emitter of the twenty-third transistor is grounded.

[0062] When the second transmitting end is a high level signal, the twenty-fourth transistor is turned off, the twenty-third transistor is turned off, the positive input end of the bridge rectifier module maintains a high voltage signal, and accordingly, the first receiving end of the first communication module receives a high level signal; when the second transmitting end is a low level signal, the twenty-fourth transistor is turned on, the twenty-third transistor is turned on, the positive input end of the bridge rectifier module is grounded, and accordingly, the first receiving end of the first communication module receives a low level signal.

[0063] Further, the seventh switch module 520 includes a voltage regulator tube D7, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a ninth resistor R9, a sixteenth resistor R16, a first triode Q1 and a second triode Q2, and the first triode and the second triode are both P-type triodes. The forward output end of the bridge rectifier module, the voltage regulator tube, the fifth resistor, the ninth resistor and the grounding end are connected in sequence, one end of the fifth resistor connected to the voltage regulator tube is connected to one end of the sixteenth resistor, the other end of the sixteenth resistor is grounded, and one end of the fifth resistor connected to the ninth resistor is connected to the base of the first triode. The output end of the power conversion module 600, the sixth resistor and the collector of the first triode are connected in sequence, the emitter of the first triode is grounded, the output end of the power conversion module 600, the seventh resistor and the collector of the second triode are connected in sequence, the base of the second triode is connected to the collector of the first triode, the emitter of the second triode is grounded, and the second receiving end is connected to the collector of the second triode.

[0064] When the positive input end of the bridge rectifier module is a high voltage signal, the first transistor is turned on, the second transistor is turned off, and the second receiving end receives a high level signal. When the positive input end of the bridge rectifier module is a low voltage signal, the first transistor is turned off, the second transistor is turned on, and the second receiving end receives a low level signal. The voltage regulator plays a role in voltage stabilization. The fifth resistor R5 and the ninth resistor R9 form a voltage divider circuit, so that the base voltage of the first transistor is relatively stable. The voltage regulator can stabilize the voltage at 5.1V. The ratio of the fifth resistor R5 to the ninth resistor R9 can be set at 1:3. Therefore, when the positive input end of the bridge rectifier module is a high voltage signal, the input voltage of the base of the first transistor will be stabilized at 3.8V.

[0065] In some embodiments, Figure 4 As shown, a unidirectional conducting device is connected in series between the connection node between the second communication module and the output end of the bridge rectifier module and the energy storage capacitor EC1, and the unidirectional conducting device conducts unidirectionally from the connection node between the second communication module and the output end of the bridge rectifier module to the energy storage capacitor EC1.

[0066] When the positive input end of the bridge rectifier module is a low voltage signal, the energy storage capacitor EC1 will discharge. Due to the presence of the unidirectional conductive device, the energy storage capacitor EC1 does not generate electricity for the second communication module, but only discharges to the input end of the power conversion module 600, so that the output end of the power conversion module 600 can supply power to the second control module, the second communication module and the display module. On the one hand, it can prevent the discharge of the energy storage capacitor EC1 from affecting the second communication module, ensuring that the second communication module can receive the correct communication signal, and on the other hand, it can reduce the power consumption of the energy storage capacitor EC1.

[0067] In this embodiment, the unidirectional conductive device can be a diode, the connection node between the second communication module and the output end of the bridge rectifier module is connected to the anode of the diode, and the cathode of the diode is connected to the energy storage capacitor EC1 to form a unidirectional conductive state.

[0068] In some embodiments, the energy storage capacitor may be a large-capacity electrolytic capacitor.

[0069] In some embodiments, Figure 4 As shown, the power conversion module 600 includes a chip PL8310E, pin 3 of the chip PL8310E is the input end of the power conversion module 600, and pin 4 of the chip PL8310E is used as the output end of the power conversion module 600. The output end of the power conversion module 600 can stably output a 5V voltage signal.

[0070] In some embodiments, the display module includes a driving module and a display screen, the second control module, the driving module and the display screen are connected in sequence, and the output end of the power conversion module is connected to the driving module, thereby driving the display screen through the driving module.

[0071] Further, such as Figure 6 As shown, the driving module may include a chip TM1640, and pins 7 and 8 of the chip TM1640 are both connected to the second control module.

[0072] like Figure 7 As shown, the display screen can be a digital tube display screen JH-307, and pins 1-13 of the digital tube display screen JH-307 are respectively connected to pins 27, 25, 23, 21, 19, 16, 15, 14, 13, 12, 11, 10 and 8 of the chip TM1640.

[0073] In some embodiments, the power supply and communication multiplexing circuit of the water heater and the shower head further includes a plurality of key modules, which are connected to the second control module. The user can adjust the working parameters of the water heater such as water temperature or the working state of the water heater by operating the key modules.

[0074] Further, such as Figure 5 As shown, the second control module includes a chip SC92f8461 b, pins 12 and 13 of the chip SC92f8461 b are connected to the second receiving end and the second transmitting end respectively, and pins 7 and 8 of the chip TM1640 are connected to pins 15 and 14 of the chip SC92f8461 b respectively.

[0075] The key module may include touch keys, such as Figure 5 As shown, the key module is provided with 4 touch keys, namely K1, K2, K3 and K4, which are connected to the corresponding pins of the chip SC92f8461 b through corresponding resistors.

[0076] The terms and words used in the above description and claims are not limited to the literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the utility model. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the utility model is provided only for illustration, and not for limiting the utility model as defined by the attached claims and their equivalents.

Claims

1. A power supply and communication multiplexing circuit for a water heater and a shower, characterized in that: It includes a first control module and a first communication module arranged on the water heater, and a bridge rectifier module, an energy storage capacitor, a second communication module, a power conversion module, a second control module and a display module arranged on the shower; the first control module is connected to the first communication module, the first communication module is connected to the input end of the bridge rectifier module, the forward output end of the bridge rectifier module is connected to the second communication module, the energy storage capacitor and the input end of the power conversion module, the second communication module and the display module are both connected to the second control module, the output end of the power conversion module is respectively connected to the second communication module, the second control module and the display module, and the power conversion module is used to convert the voltage of its input end into the working voltage required by the second communication module, the second control module and the display module so that the second communication module, the second control module and the display module are powered on and work.

2. The power supply and communication multiplexing circuit for the water heater and shower head according to claim 1, characterized in that: The first communication module includes a first transmitting end, a first receiving end, a first switch module, a second switch module, a third switch module, a fourth switch module and a fifth switch module; the first transmitting end and the first receiving end are both connected to the first control module, the first switch module, the second switch module, the third switch module, the fourth switch module and the fifth switch module each include two connecting ends and a control end, and the two connecting ends of the first switch module, the second switch module, the third switch module, the fourth switch module and the fifth switch module are both connected or disconnected according to the level signal of the respective control ends; The first transmitting end is connected to the control end of the first switch module, one connection end of the first switch module is connected to the DC power supply, and the other connection end is grounded; the connection end of the first switch module connected to the DC power supply is connected to the control end of the second switch module, the control end of the second switch module is connected to the control end of the third switch module, one connection end of the second switch module is connected to the DC power supply, and the other connection end is connected to a connection end of the third switch module, the other connection end of the third switch module is grounded, the connection end of the third switch module connected to the second switch module is connected to the positive input end of the bridge rectifier module, and the negative input end of the bridge rectifier module is grounded; when the level signals of the control ends are the same, the conduction states of the two connection ends of the second switch module are opposite to the conduction states of the two connection ends of the third switch module; One connection end of the fourth switch module is connected to a DC power supply, and the other connection end is connected to a control end of the fifth switch module, and the control end of the fourth switch module is connected to a positive input end of a bridge rectifier module; one connection end of the fifth switch module is connected to a DC power supply, and the other connection end is grounded, and the first receiving end is connected to a connection end of the fifth switch module connected to a DC power supply.

3. The power supply and communication multiplexing circuit for the water heater and shower head according to claim 2, characterized in that: The first communication module also includes a constant current module connected in series between the connection end of the second switch module and the DC power supply, the constant current module includes a third triode, an eleventh triode, a sixth resistor, a seventh resistor, an eighth resistor and a fifteenth resistor, the third triode and the eleventh triode are both N-type triodes; the DC power supply, the sixth resistor, the fifteenth resistor and the grounding end are connected in sequence, the end of the sixth resistor connected to the fifteenth resistor is also connected to the base of the third triode, the DC power supply, the seventh resistor and the emitter of the eleventh triode are connected in sequence, the collector of the eleventh triode is connected to the base of the third triode, the DC power supply, the eighth resistor and the emitter of the third triode are connected in sequence, the base of the eleventh triode is connected to the emitter of the third triode, and the collector of the third triode is connected to the connection end of the second switch module.

4. The power supply and communication multiplexing circuit for the water heater and shower according to claim 2, characterized in that: The first communication module also includes a thirteenth transistor, a ninth resistor, a tenth resistor, an eleventh resistor and a seventeenth resistor, and the fourth switch module includes a twelfth transistor, and the twelfth transistor and the thirteenth transistor are both N-type transistors; the DC power supply, the ninth resistor, the seventeenth resistor and the grounding terminal are connected in sequence, the end of the ninth resistor connected to the seventeenth resistor is connected to the base of the thirteenth transistor, the DC power supply, the tenth resistor are connected to the emitter of the thirteenth transistor, the collector of the thirteenth transistor is grounded, the emitter of the twelfth transistor is connected to the emitter of the thirteenth transistor, the collector of the twelfth transistor is connected to the eighteenth resistor, and the base of the twelfth transistor, the eleventh resistor and the positive input terminal of the bridge rectifier module are connected in sequence.

5. The power supply and communication multiplexing circuit for the water heater and shower head according to claim 2, characterized in that: The second communication module includes a second transmitting end, a second receiving end, a sixth switch module and a seventh switch module; the second transmitting end and the second receiving end are both connected to the second control module, the sixth switch module and the seventh switch module each include two connecting ends and a control end, and the two connecting ends of the sixth switch module and the seventh switch module are both connected or disconnected according to the level signal of the respective control ends; One connection end of the sixth switch module is connected to the forward output end of the bridge rectifier module, the other connection end is grounded, and the control end of the sixth switch module is connected to the second transmitting end; The control end of the seventh switch module is connected to the forward output end of the bridge rectifier module, one connection end of the seventh switch module is connected to the output end of the power conversion module, the other connection end is grounded, and the connection end of the seventh switch module connected to the output end of the power conversion module is connected to the second receiving end.

6. The power supply and communication multiplexing circuit for the water heater and shower head according to claim 5, characterized in that: The sixth switch module includes a twenty-third transistor, a twenty-fourth transistor, a tenth resistor and a twentieth resistor, the twenty-third transistor is a P-type transistor, and the twenty-fourth transistor is an N-type transistor; the emitter and the collector of the twenty-third transistor are respectively two connection ends of the sixth switch module, and the base of the twenty-fourth transistor is the control end of the sixth switch module; the output end of the power conversion module is connected to the emitter of the twenty-fourth transistor, the base of the twenty-fourth transistor, the twentieth resistor and the second transmitting end are connected in sequence, and the collector of the twenty-fourth transistor, the tenth resistor and the base of the twenty-third transistor are connected in sequence; the forward output end of the bridge rectifier module is connected to the collector of the twenty-third transistor, and the emitter of the twenty-third transistor is grounded.

7. The power supply and communication multiplexing circuit for the water heater and shower head according to claim 5, characterized in that: The seventh switch module includes a voltage regulator, a fifth resistor, a sixth resistor, a seventh resistor, a ninth resistor, a sixteenth resistor, a first triode and a second triode, wherein the first triode and the second triode are both P-type triodes; the forward output end, the voltage regulator, the fifth resistor, the ninth resistor and the grounding end of the bridge rectifier module are connected in sequence, one end of the fifth resistor connected to the voltage regulator is connected to one end of the sixteenth resistor, the other end of the sixteenth resistor is grounded, one end of the fifth resistor connected to the ninth resistor is connected to the base of the first triode, the output end of the power conversion module, the sixth resistor and the collector of the first triode are connected in sequence, the emitter of the first triode is grounded, the output end of the power conversion module, the seventh resistor and the collector of the second triode are connected in sequence, the base of the second triode is connected to the collector of the first triode, the emitter of the second triode is grounded, and the second receiving end is connected to the collector of the second triode.

8. The power supply and communication multiplexing circuit for a water heater and a shower according to any one of claims 1 to 7, characterized in that: A unidirectional conducting device is connected in series between the connection node between the second communication module and the output end of the bridge rectifier module and the energy storage capacitor. The unidirectional conducting device conducts unidirectionally from the connection node between the second communication module and the output end of the bridge rectifier module to the energy storage capacitor.

9. The power supply and communication multiplexing circuit for a water heater and a shower according to any one of claims 1 to 7, characterized in that: The display module includes a driving module and a display screen. The second control module, the driving module and the display screen are connected in sequence. The output end of the power conversion module is connected to the driving module.

10. The power supply and communication multiplexing circuit for a water heater and a shower according to any one of claims 1 to 7, characterized in that: It also includes a plurality of key modules, and the key modules are connected to the second control module.

Images