Control circuit of electric water boiler

Abstract

The utility model discloses a control circuit of an electric water boiler. The control circuit comprises a clock relay, an alternating current relay, an intermediate relay and a heater. A first contact of the clock relay is connected with a positive terminal of a 12V power supply, and a second contact of the clock relay is connected with a coil end of the alternating current relay; a third contact of the clock relay is connected with a positive terminal of a 12V power supply, a fourth contact of the clock relay is connected with an input end of the intermediate relay, and an output end of the intermediate relay is respectively connected with a coil end of the alternating current relay and a coil end of the intermediate relay; the input end of the alternating-current relay is connected with the alternating-current power supply access end, and the output end of the alternating-current relay is electrically connected with the heater. The clock relay automatically switches connection or disconnection of the first contact and the second contact and disconnection or connection of the third contact and the fourth contact according to set time, and then the heater is automatically controlled to heat in a timing mode. The energy consumption loss of the water boiler can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water boilers, and more specifically, to a control circuit of an electric water boiler. Background Art

[0002] To ensure the hot water needs of employees, cigarette factories currently install high-power electric water heaters in various production and office areas. Due to the operating characteristics of cigarette factories, employees with different functions have different working hours, which often causes the electric water heaters to be in a preheating state, resulting in low utilization and energy loss during non-working hours. Therefore, how to control the energy saving of electric water heaters is of great significance. Utility Model Content

[0003] The utility model provides a control circuit for an electric water boiler, which solves the problem that the existing electric water boilers have different intelligent control heating, which easily causes energy loss of the water boiler, and can improve the safety and intelligence of the control of the electric water boiler.

[0004] In order to achieve the above objectives, the utility model provides the following technical solutions:

[0005] A control circuit for an electric water boiler, comprising: a clock relay, an AC relay, an intermediate relay and a heater;

[0006] The first contact of the clock relay is connected to the positive terminal of the 12V power supply, and the second contact of the clock relay is connected to the coil end of the AC relay, and when the first contact and the second contact are connected, the coil end of the AC relay is energized;

[0007] The third contact of the clock relay is connected to the positive terminal of the 12V power supply, the fourth contact of the clock relay is connected to the input end of the intermediate relay, the output end of the intermediate relay is connected to the coil end of the AC relay and the coil end of the intermediate relay respectively, and the coil end of the AC relay is energized when the third contact and the fourth contact are connected;

[0008] The clock relay automatically switches the first contact and the second contact to be connected or disconnected, and the third contact and the fourth contact to be disconnected or connected according to the set time;

[0009] The input end of the AC relay is connected to the AC power supply access end, and the output end of the AC relay is electrically connected to the heater. When the coil end of the AC relay is energized, the AC relay conducts the electrical connection between the AC power supply access end and the heater, so that the heater heats the water boiler.

[0010] Preferably, it also includes: a manual control switch;

[0011] One end of the manual control switch is connected to the fourth contact of the clock relay, and the other end of the manual control switch is connected to the coil end of the intermediate relay;

[0012] When the third contact is connected to the fourth contact and the manual control switch is closed, the intermediate relay conducts the electrical connection between the 12V power supply and the coil end of the AC relay to close the AC relay.

[0013] Preferably, it also includes: a temperature controller;

[0014] The temperature controller is connected in series between the positive terminal of the 12V power supply and the clock relay;

[0015] The thermostat is used to control the on / off of the electrical connection between the power supply and the heater according to the water temperature of the electric water heater, and to display the water temperature in real time.

[0016] Preferably, it also includes: a fuse;

[0017] The fuse is connected in series between the positive terminal of the 12V power supply and the thermostat.

[0018] Preferably, the control end of the clock relay is connected to the positive connection end of the 12V power supply, so that the clock relay is always in a working state.

[0019] Preferably, the intermediate relay and the AC relay are normally open relays.

[0020] Preferably, it also includes: an ACDC converter;

[0021] The output end of the ACDC converter is connected to the positive terminal of the 12V power supply, and the input end of the ACDC converter is connected to the AC power supply access end;

[0022] The ACDC converter is used to convert alternating current into 12V direct current.

[0023] Preferably, the heater is a heating tube.

[0024] Preferably, the manual control switch is a normally open switch.

[0025] The utility model provides a control circuit for an electric water boiler, which adopts a clock relay to regularly control the on-off of the electrical connection between an AC relay and a heater, so as to control the automatic operation time of the water boiler, solves the problem that the existing electric water boilers have different intelligent control heating, which easily causes high energy consumption of the water boiler, and can improve the safety and intelligence of the control of the electric water boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below.

[0027] Figure 1 The utility model is a structural schematic diagram of a control circuit of an electric water boiler.

[0028] Figure 2 The utility model is provided in an embodiment of the electric water boiler. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present utility model, the embodiments of the present utility model are further described in detail below in conjunction with the accompanying drawings and implementation methods.

[0030] In view of the problem that the water boilers currently provided in office areas have low utilization rate during non-working hours and easily cause energy loss, the utility model provides a control circuit for an electric water boiler to solve the problem that the existing electric water boilers have different intelligent control heating and easily cause energy loss of the water boiler, and can improve the safety and intelligence of the control of the electric water boiler.

[0031] like Figure 1 As shown, a control circuit of an electric water heater includes: a clock relay KT, an AC relay KM, an intermediate relay KA and a heater. The first contact 11 of the clock relay is connected to the positive terminal of the 12V power supply, and the second contact 12 of the clock relay KT is connected to the coil end of the AC relay KM. When the first contact 11 and the second contact 12 are connected, the coil end of the AC relay KM is energized. The third contact 13 of the clock relay KT is connected to the positive terminal of the 12V power supply, the fourth contact 14 of the clock relay KT is connected to the input end of the intermediate relay KA, and the output end of the intermediate relay KA is respectively connected to the coil end of the AC relay KM and the coil end of the intermediate relay KA, and when the third contact 13 and the fourth contact 14 are connected, the coil end of the AC relay KM is energized. The clock relay KT automatically switches the connection or disconnection of the first contact 11 and the second contact 12, and the disconnection or connection of the third contact 13 and the fourth contact 14 according to the set time. The input end of the AC relay KM is connected to the AC power supply access end, and the output end of the AC relay KM is electrically connected to the heater. When the coil end of the AC relay is energized, the AC relay conducts the electrical connection between the AC power supply access end and the heater, so that the heater heats the water boiler.

[0032] Specifically, Figure 2As shown, when the clock relay KT is in the initial state, the first contact 11 and the second contact 12 are in the open state, and the third contact 13 and the fourth contact 14 are in the closed state. When in use, the clock relay KT controls the first contact 11 and the second contact 12 to be in the closed state according to the set time, and the third contact 13 and the fourth contact 14 are in the open state. At this time, the control electricity in the circuit transmits electricity to the coil end of the AC relay KM through the first contact 11 and the second contact 12, so that the AC relay KM is closed to supply power to the heater, thereby preheating the water boiler. When the set time is reached, the clock relay switches on the third contact 13 and the fourth contact 14, and disconnects the connection between the first contact 11 and the second contact 12. The clock relay can switch different control circuits of the water boiler to realize automatic heating control of the water boiler, so that employees do not need to open and close the water boiler regularly, and can realize automatic heating when going to work and automatic disconnection after get off work, which can not only achieve energy saving, but also prevent repeated heating and boiling of hot water, affecting the water quality of the water boiler.

[0033] The circuit also includes: a manual control switch SAE; one end of the manual control switch SAE is connected to the fourth contact of the clock relay KT, and the other end of the manual control switch SAE is connected to the coil end of the intermediate relay KA. When the third contact is connected to the fourth contact and the manual control switch is closed, the intermediate relay conducts the electrical connection between the 12V power supply and the coil end of the AC relay KM, so that the AC relay KM is closed.

[0034] Specifically, if the water boiler needs to be used during non-set time, the heater is controlled by the manual control switch. At this time, the third contact 13 is connected to the fourth contact 14. When the manual control switch SAE is closed, the coil end of the intermediate relay is energized, the intermediate relay is closed, the coil end of the AC relay KM is energized, and then the AC relay KM is closed, so that the heater is powered to heat.

[0035] The circuit also includes: a thermostat (not shown in the figure); the thermostat is connected in series between the positive terminal of the 12V power supply and the clock relay; the thermostat is used to control the on and off of the electrical connection between the power supply and the heater according to the water temperature of the electric water heater, and display the water temperature in real time.

[0036] The circuit also includes: a fuse (not shown in the figure); the fuse is connected in series between the positive terminal of the 12V power supply and the temperature controller.

[0037] Furthermore, the control end of the clock relay is connected to the positive connection end of the 12V power supply, so that the clock relay is always in a working state.

[0038] Furthermore, the intermediate relay and the AC relay are normally open relays.

[0039] Furthermore, the circuit also includes: an ACDC converter; the output end of the ACDC converter is connected to the positive terminal of the 12V power supply, and the input end of the ACDC converter is connected to the AC power supply access end; the ACDC converter is used to convert AC power into 12V DC power.

[0040] Furthermore, the heater is a heating tube.

[0041] Furthermore, the manual control switch is a normally open switch.

[0042] It can be seen that the utility model provides a control circuit for an electric water boiler, which adopts a clock relay to regularly control the on and off of the electrical connection between the AC relay and the heater to control the automatic operation time of the water boiler, solves the problem that the existing electric water boilers have different intelligent control heating, which easily causes high energy consumption of the water boiler, and can improve the safety and intelligence of the control of the electric water boiler.

[0043] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation as shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A control circuit for an electric water boiler, characterized in that: include: Clock relays, AC relays, intermediate relays and heaters; The first contact of the clock relay is connected to the positive terminal of the 12V power supply, and the second contact of the clock relay is connected to the coil end of the AC relay, and when the first contact and the second contact are connected, the coil end of the AC relay is energized; The third contact of the clock relay is connected to the positive terminal of the 12V power supply, the fourth contact of the clock relay is connected to the input end of the intermediate relay, the output end of the intermediate relay is connected to the coil end of the AC relay and the coil end of the intermediate relay respectively, and the coil end of the AC relay is energized when the third contact and the fourth contact are connected; The clock relay automatically switches the first contact and the second contact to be connected or disconnected, and the third contact and the fourth contact to be disconnected or connected according to the set time; The input end of the intermediate relay is connected to the fourth contact, and the output end of the intermediate relay is connected to the coil end of the AC relay; The input end of the AC relay is connected to the AC power supply access end, and the output end of the AC relay is electrically connected to the heater. When the coil end of the AC relay is energized, the AC relay conducts the electrical connection between the AC power supply access end and the heater, so that the heater heats the water boiler.

2. The control circuit of the electric water boiler according to claim 1, characterized in that: Also includes: Manual control switch; One end of the manual control switch is connected to the fourth contact of the clock relay, and the other end of the manual control switch is connected to the coil end of the intermediate relay; When the third contact is connected to the fourth contact and the manual control switch is closed, the intermediate relay conducts the electrical connection between the 12V power supply and the coil end of the AC relay to close the AC relay.

3. The control circuit of the electric water boiler according to claim 2, characterized in that: Also includes: Thermostat; The temperature controller is connected in series between the positive terminal of the 12V power supply and the clock relay; The thermostat is used to control the on / off of the electrical connection between the power supply and the heater according to the water temperature of the electric water heater, and to display the water temperature in real time.

4. The control circuit of the electric water boiler according to claim 3, characterized in that: Also includes: fuse; The fuse is connected in series between the positive terminal of the 12V power supply and the thermostat.

5. The control circuit of the electric water boiler according to claim 4, characterized in that: The control end of the clock relay is connected to the positive connection end of the 12V power supply, so that the clock relay is always in a working state.

6. The control circuit of the electric water boiler according to claim 5, characterized in that: The intermediate relay and the AC relay are normally open relays.

7. The control circuit of the electric water boiler according to claim 6, characterized in that: Also includes: ACDC converter; The output end of the ACDC converter is connected to the positive terminal of the 12V power supply, and the input end of the ACDC converter is connected to the AC power supply access end; The ACDC converter is used to convert alternating current into 12V direct current.

8. The control circuit of the electric water boiler according to claim 7, characterized in that: The heater is a heating tube.

9. The control circuit of the electric water boiler according to claim 8, characterized in that: The manual control switch is a normally open switch.

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