Time-sharing heating double-tube heater

Abstract

A time-sharing heating double-pipe type heater comprises a heater main container, a heater inner container, a main container water inlet pipe, a water outlet pipe, a main container heating pipe, an inner container heating pipe and a control circuit. The control circuit comprises a control unit used for receiving and controlling signals of the temperature controller and the water flow sensor, a dry burning prevention unit, a power supply unit, a temperature control unit used for controlling a main container heating pipe of the heater, and a water flow sensor unit used for controlling an inner container heating pipe. The technical structure is simple, water in the heater main container is firstly heated by the main container heating pipe, and then the water is heated again by the inner container heating pipe and flows out through the water outlet pipe; therefore, the hot water which is firstly heated can be preferentially used, so that the heating speed and the heating efficiency are greatly improved under the same condition.

Description

Technical Field

[0001] The utility model relates to the field of household appliances, and particularly relates to the related technology of electric water heaters. Background Art

[0002] At present, the commonly used electric water heaters are divided into traditional storage electric water heaters and instant electric water heaters. The structure of the traditional storage electric water heater is an outer shell plus an inner tank and a circuit control system. The heating mode adopts a single heating tube for heating, and the inner tank structure is that the heating tube is installed at the bottom, and the water outlet is at the top of the inner tank. The distance between the two is relatively far. During the process of extracting hot water for use, when the heating tube reheats, since the heating tube is too far from the water outlet, the heat generated by the heating tube diffuses into the surrounding cold water, resulting in the inability to provide hot water in time for use. This greatly reduces the hot water supply and shortens the hot water usage time. The internal structure of the instant electric water heater is a double inner tank, with a complex structure, resulting in phenomena such as slow heating and low hot water utilization rate for the left and right inner tanks or the upper and lower inner tanks. Or, for some double-tube instant electric water heaters, the working mode of the heating tubes is to control the operation of the two heating tubes by the water pressure to push the valve body to transmit signals. In this case, when the water pressure is insufficient, the signal cannot be transmitted. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies of the prior art, design a device that controls the operation of two heating tubes at different time periods, improves the thermal efficiency of the heater, and realizes the secondary rapid heating of the water outlet pipe.

[0004] The purpose of the utility model can be achieved by the following technical solutions. A two-tube heater with time-sharing heating includes a heater main tank, a heater inner tank arranged in the heater main tank, a main tank water inlet pipe, a water outlet pipe, a main tank heating tube, an inner tank heating tube, and a control circuit. The water inlet pipe is of a bent pipe structure and is introduced into the heating main tank from the bottom of the heater main tank. The bent part of the water inlet pipe is arranged at the top inside the heater main tank, and the water outlet of the water inlet pipe faces downward, and the water outlet of the water inlet pipe is lower than the top of the main tank heating tube. The water outlet pipe is led out of the heater main tank from the top to the bottom of the heater inner tank. The water outlet of the water inlet pipe of the heater inner tank is arranged at the bottom of the heater inner tank, and the water inlet of the water inlet pipe of the heater inner tank is arranged at the top inside the heater main tank. It is characterized in that the control circuit includes: a control unit for receiving and controlling the signals of a temperature controller and a water flow sensor, a dry-run prevention unit, a power supply unit, a temperature control unit for controlling the main tank heating tube of the heater, and a water flow sensor unit for controlling the inner tank heating tube.

[0005] Further, for the two-tube heater with time-sharing heating, to control the operation of the main tank heating tube, the temperature sensing probe of the temperature control unit is arranged inside the heater main tank; to control the operation of the inner tank heating tube, the water flow sensor of the water flow sensor unit is arranged at the water inlet of the main tank water inlet pipe.

[0006] Furthermore, an anti-overflow hole is provided at the top end of the bent portion of the water inlet pipe disposed in the main heater tank.

[0007] Furthermore, a protrusion higher than the top plane is provided at the top of the main heater tank, and the water inlet of the water inlet pipe of the inner heater tank is disposed therein, so that the water inlet of the water inlet pipe of the inner heater tank is higher than the top plane of the main heater tank.

[0008] Compared with the prior art, the structure of the present utility model is simple. In this technology, the water in the main heater tank is first heated by the main tank heating pipe. The heated hot water moves upward, enters the inner heater tank through the water inlet of the water inlet pipe of the inner heater tank, and then is heated again by the inner tank heating pipe and flows out through the water outlet pipe. In this way, the heated hot water can be used first, so under the same conditions, the heating speed and heating efficiency are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of the present utility model;

[0010] Figure 2 is a circuit block diagram of the present utility model;

[0011] Figure 3 is a schematic diagram of the circuit principle of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The present utility model utilizes the principle of water temperature difference, and adopts a temperature control unit and a water flow sensor unit to respectively control the operation of the main tank heating pipe and the inner tank heating pipe. When there is no water inlet in the water inlet pipe and the water in the main heater tank is relatively static, the main tank heating pipe works to heat the water in the main heater tank until the set temperature. When there is water inlet in the water inlet pipe and the water in the main heater tank is relatively dynamic, the inner tank heating pipe works to heat the water in the inner heater tank. That is, when the water in the main heater tank does not reach the set temperature, there is always a heating pipe working.

[0013] As Figure 1 shown, the present utility model includes a main heater tank 1, an inner heater tank 2 disposed in the main heater tank, a main tank water inlet pipe 3, a water outlet pipe 4, a main tank heating pipe 5, an inner tank heating pipe 6, an inner pipe water inlet pipe 7 and a control circuit 8. The main tank water inlet pipe 3 is of a bent pipe structure. The water inlet 30 of the main tank water inlet pipe is disposed at the bottom of the main heater tank, and the bent portion of the water inlet pipe is disposed at the top in the main heater tank 1. The water outlet 31 of the main tank water inlet pipe faces downward and is lower than the top of the main tank heating pipe 5. The water outlet pipe 4 extends from the top to the bottom of the inner heater tank 2 out of the main heater tank 1. The water outlet 70 of the water inlet pipe of the inner heater tank is disposed at the bottom of the inner heater tank 2, and the water inlet 71 of the water inlet pipe of the inner heater tank is disposed at the top in the main heater tank 1.

[0014] It can also be that at the top 10 of the overall heater tank, there is a protrusion 100 higher than the top plane, and the water inlet 71 of the water inlet pipe of the heater inner tank is arranged therein, so that the water inlet 71 of the water inlet pipe of the heater inner tank is higher than the top plane of the overall heater tank, which is convenient for better picking up the hot water heated for the first time.

[0015] At the top end of the bent part of the water inlet pipe 3 arranged in the overall heater tank 1, there is an anti-overflow hole 32.

[0016] Such as Figure 2 As shown, the control circuit 8 includes a control unit 80, a dry-run prevention unit 83, a power supply unit 84, a temperature control unit 81 for controlling the heating tube of the overall heater tank, and a water flow sensor unit 82 for controlling the inner tank heating tube.

[0017] The control circuit 8 is installed outside the overall heater tank 1 and inside the heater box 9. The temperature sensing probe 810 of the temperature control unit 81 is arranged inside the overall heater tank 1 to detect the water temperature inside the overall heater tank. The water flow sensor 820 of the water flow sensor unit 82 is arranged at the water inlet 30 of the main water inlet pipe to detect whether there is water flow through the water inlet 30 of the main water inlet pipe, and is used to control the operation of the inner tank heating tube 6. The power supply unit 84 supplies power to the control circuit 8.

[0018] The setting of the control unit 80 of the control circuit 8 is as follows:

[0019] 1. When there is no water flow through the water inlet 30 of the main water inlet pipe, and the dry-run prevention unit 83 detects that the overall heater tank 1 is full of water, at this time, the temperature control unit 81 sends a signal to the control unit 80, and the control unit 80 controls the operation of the overall tank heating tube 5 to heat the water in the overall heater tank 1 to the set water temperature.

[0020] 2. When there is water flow through the water inlet 30 of the main water inlet pipe, the water flow sensor unit 82 sends a signal to the control unit 80, and the control unit 80 controls the operation of the inner tank heating tube 6 to heat the water in the heater inner tank 2 again. When the water inlet at the water inlet 30 of the main water inlet pipe stops, under the control of the control unit 80, the power supply for the operation of the inner tank heating tube 6 is cut off, and the overall tank heating tube 5 is controlled to perform the heating operation until the water is heated to the set water temperature.

[0021] 3. When the overall tank heating tube 5 is in the working state, when there is water flow through the water inlet 30 of the main water inlet pipe, the water flow sensor 820 of the water flow sensor unit 82 gives a water signal, and the control unit 80 will automatically control the overall tank heating tube 5 to stop the heating operation and start the operation of the inner tank heating tube 6. When there is no water flow at the water inlet 30 of the main water inlet pipe, the water flow sensor unit 82 sends a signal to the control unit 80, and the control unit 80 controls the inner tank heating tube 6 to stop the heating operation and controls the overall tank heating tube 5 to start the heating operation.

[0022] In the working process of this technology, water first enters the heater main tank 1 through the water inlet 30 of the main tank water inlet pipe. When the heater main tank 1 is filled with water, there is no water flow at the water inlet 30 of the main tank water inlet pipe at this time. The main tank heating pipe 5 starts to preliminarily heat the water in the heater main tank 1. After heating to the set temperature, the control unit 80 controls the water inlet at the water inlet 30 of the inlet pipe; at the same time, it controls the inner tank heating pipe 6 to start heating. The water in the heater main tank 1 enters the heater inner tank 2 through the water inlet 71 of the heater inner tank inlet pipe for secondary heating, and the heated water flows out through the outlet pipe 4.

[0023] As Figure 2 shown, it is the circuit connection schematic diagram of the embodiment of the present utility model, and its installation and operation are as follows:

[0024] 1. The temperature sensing probe 810 of the temperature control unit 81 is installed in the heater main tank 1, and the over-temperature temperature induction head of the dry-run prevention unit 83 is connected to the induction hole of the inner tank heating pipe 6.

[0025] 2. First, an external power supply is provided to the power supply unit 84, and the current passes through the temperature control unit 81 and then flows to the control unit 80. In the case of no water flow, the current directly passes through the control unit 80 to control the operation of the main tank heating pipe 5. When the temperature sensing probe 810 of the temperature control unit 81 detects that the water temperature reaches the set temperature, the power supply will be automatically cut off, and the water heater enters the standby state.

[0026] 3. When there is water flow passing through the water inlet flow sensor 820 in the energized state of the control unit 80, the water flow sensor unit 82 will send a signal. When the water flow sensor unit 82 in the control unit 80 receives the signal, the control unit 80 will switch the power supply to control the operation of the inner tank heating pipe 6. When the temperature set by the dry-run prevention unit 83 is reached, a signal will be sent by the dry-run prevention unit 83, and the control unit 80 will cut off the power supply.

[0027] 4. When the water stops flowing in the working state of the inner tank heating pipe 6, the water flow sensor 820 sends a signal, and the water flow control unit 82 switches the power supply to control the operation of the main tank heating pipe 5 until the water temperature reaches the set constant temperature of the temperature control unit.

Claims

1. A double-tube heater for time-sharing heating, comprising a heater main tank, a heater inner tank arranged in the heater main tank, a main tank water inlet pipe, a water outlet pipe, a main tank heating tube, an inner tank heating tube and a control circuit, wherein the water inlet pipe is a curved pipe structure, the water inlet pipe is introduced from the bottom of the heater main tank into the heating main tank, the curved part of the water inlet pipe is arranged at the top of the heater main tank, the water outlet of the water inlet pipe faces downward, and the water outlet of the water inlet pipe is lower than the top of the main tank heating tube; the water outlet pipe leads the heater main tank from the top to the bottom of the heater inner tank; the water outlet of the heater inner tank water inlet pipe is arranged at the bottom of the heater inner tank, and the water inlet of the heater inner tank water inlet pipe is arranged at the top of the heater main tank; characterized in that, The control circuit includes: a control unit for receiving and controlling signals from a temperature controller and a water flow sensor, an anti-dry burning unit, a power supply unit, a temperature control unit for controlling the heater main tank heating tube, and a water flow sensor unit for controlling the inner tank heating tube.

2. A double-tube heater for time-sharing heating according to claim 1, characterized in that: To control the operation of the main tank heating tube, the temperature sensing probe of the temperature controller unit is arranged in the heater main tank; to control the operation of the inner tank heating tube, the water flow sensor of the water flow sensor unit is arranged at the water inlet of the main tank water inlet pipe.

3. A double-tube heater for time-sharing heating according to claim 1 or 2, characterized in that: An anti-overflow hole is arranged at the top of the bent portion of the water inlet pipe arranged in the heater main tank.

4. A double-tube heater for time-sharing heating according to claim 1 or 2, characterized in that: The top of the heater main tank is provided with a protrusion higher than the top plane, and the water inlet of the heater inner tank water inlet pipe is arranged therein, so that the water inlet of the heater inner tank water inlet pipe is higher than the top plane of the heater main tank.

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