CN103591636A - Double water tank heat exchange water supply system and its control method - Google Patents

Abstract

A double-water-tank heat exchange water supply system comprises a water tank, a water pump, a one-way valve and a cold and hot water heat exchanger which are sequentially connected on a circulating pipe to form a circulating loop, wherein a temperature sensor is arranged in the water tank, a water storage tank is communicated between the water tank and the cold and hot water heat exchanger, and the cold and hot water heat exchanger is directly communicated with the water tank or is communicated with the water tank through the water storage tank under the control of a switching electromagnetic valve; a cold water inlet pipe and a water flow switch are also arranged between the one-way valve and the cold and hot water heat exchanger; the water pump, the cold and hot water heat exchanger, the temperature sensor, the electromagnetic valve and the water flow switch are connected with the central control system. A control method for a double-water-tank heat exchange water supply system is characterized in that different working conditions of the water supply system are realized by detecting the working states of a temperature sensor and a water flow switch and intelligently switching electromagnetic valves. The invention adopts two water tanks to increase the water consumption, and can select to heat one water tank by switching the electromagnetic valve, thereby reducing the heating or refrigerating time, shortening the waiting time of users, and saving the electric energy without starting the water pump when supplementing tap water.

Description

Double water tank heat exchange water supply system and its control method

technical field

The invention relates to a water supply system, in particular to a double water tank heat exchange water supply system and a control method thereof.

Background technique

In the heat exchange water supply system in the prior art, the user needs to wait for a long time for the hot and cold water to be mixed to obtain the final required water temperature, which wastes the user's time, and the user may not completely use up the water in the water tank. The remaining hot water is wasted, which leads to a long waiting time for the water circulation heat pump water heater in the prior art and serious waste of energy.

Contents of the invention

The purpose of the present invention is to provide a heat exchange water supply system with simple structure, convenient control and energy saving and its control method, so as to overcome the deficiencies in the prior art.

A double water tank heat exchange water supply system designed for this purpose, including water tanks, water pumps, check valves and hot and cold water heat exchangers connected to the circulation pipe in sequence to form a circulation loop, its structural feature is that the water tank is equipped with Temperature sensor, there is a water storage tank bypassed between the water tank and the hot and cold water heat exchanger, and the cold and hot water heat exchanger is directly connected to the water tank or connected through the water storage tank by switching the solenoid valve control; the one-way valve is connected to the cold and hot water exchanger A cold water inlet pipe and a water flow switch are also arranged between the heaters; the water pump, the cold and hot water heat exchanger, the temperature sensor, the electromagnetic valve, and the water flow switch are connected to the central control system.

The water inlet end, the water outlet end and the circulation pipe of the water storage tank are respectively connected with a water inlet pipe and a water outlet pipe; wherein the water inlet pipe is connected to the water outlet end of the hot and cold water heat exchanger through the circulation pipe, and the water outlet pipe is connected to the water outlet pipe through the circulation pipe. Inlet end of water tank.

The solenoid valve includes a first solenoid valve and a second solenoid valve, wherein the first solenoid valve is arranged downstream of the junction of the circulation pipe and the water inlet pipe, and the second solenoid valve is arranged on the water inlet pipe.

A safety valve is arranged on the cold water inlet pipe.

The cold and hot water heat exchanger is externally connected to heat pump cold and hot water equipment; the water tank is also provided with a water supply outlet, and the water supply outlet is externally connected to shower, faucet, and bathtub water equipment.

A control method for a double water tank heat exchange water supply system is characterized by comprising the following steps:

1) Detect the working status of the temperature sensor and water flow switch, and judge the execution of steps 2, 3 or 4;

2) If the temperature T of the water in the water tank ≥ the temperature t set by the user, and the water flow switch is closed, the first solenoid valve is closed and the second solenoid valve is opened;

3) If the temperature T of the water in the water tank ≥ the temperature t set by the user, and the water flow switch is off, both the first solenoid valve and the second solenoid valve are closed;

4) If the temperature T of the water in the water tank is less than the temperature t set by the user, and the water flow switch is turned off or closed, the first solenoid valve will be opened and the second solenoid valve will be closed.

The water flow switch is controlled by a safety valve; when the safety valve is opened, the water flow switch is closed, and the water pump is turned off; when the safety valve is closed, the water flow switch is disconnected, and the water pump is turned on.

The present invention uses two water tanks to increase the water consumption, and can choose to use one water tank by switching the solenoid valve. The water does not pass through the water storage tank, which reduces the time for heating or cooling, shortens the waiting time for users, and does not need to start the water pump when replenishing tap water. Energy is saved.

Description of drawings

FIG. 1 is a schematic diagram of a connection structure of an embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1, a double water tank heat exchange water supply system includes a water tank 2, a water pump 3, a one-way valve 4 and a hot and cold water heat exchanger 6 which are sequentially connected to a circulation pipe 1 to form a circulation loop. There is a temperature sensor 7 to detect the temperature of the water in the water tank 2; there is a water storage tank 8 bypassed between the water tank 2 and the hot and cold water heat exchanger 6, and the cold and hot water heat exchanger 6 is controlled by switching the solenoid valve to communicate with the water The tank 2 is connected directly or through the water storage tank 8; a cold water inlet pipe 9 and a water flow switch 5 are also arranged between the check valve 4 and the hot and cold water heat exchanger 6; the water pump 3, the hot and cold water heat exchanger 6, and the temperature sensor 7. Solenoid valve and water flow switch 5 are connected to the central control system (not shown in the figure).

The water inlet end, the water outlet end of the water storage tank 8 and the circulation pipe 1 are respectively connected with a water inlet pipe 11 and a water outlet pipe 12; wherein the water inlet pipe 11 is connected to the water outlet end of the hot and cold water heat exchanger 6 through the circulation pipe 1, and the water outlet pipe 12 is connected to the water inlet end of the water tank 2 through the circulation pipe 1.

The solenoid valve includes a first solenoid valve 13 and a second solenoid valve 14 , wherein the first solenoid valve 13 is arranged downstream of the junction between the circulation pipe 1 and the water inlet pipe 11 , and the second solenoid valve 14 is arranged on the water inlet pipe 11 . The cold water inlet pipe 9 is provided with a safety valve 10 . The cold and hot water heat exchanger 6 is externally connected with heat pump cold and hot water equipment; the water tank 2 is also provided with a water supply outlet 2.1, and the water supply outlet 2.1 is externally connected with shower, faucet, and bathtub water equipment.

A control method for a heat exchange water supply system with two water tanks, comprising the following steps: 1) detecting the working status of the temperature sensor 7 and the water flow switch 5, and judging the execution of steps 2, 3 or 4; 2) if the temperature of the water in the water tank 2 T ≥ the temperature t set by the user, and the water flow switch 5 is in the closed state, the first solenoid valve 13 is closed, and the second solenoid valve 14 is opened; at this time, the water supply system is heated or refrigerated through two water tanks; 3) If water The temperature T of the water in the tank 2 ≥ the temperature t set by the user, and the water flow switch 5 is in the off state, then both the first solenoid valve 13 and the second solenoid valve 14 are closed; at this time, the water supply system does not circulate; 4) If the temperature T of the water in the water tank 2<the temperature t set by the user, the water flow switch 5 is disconnected or closed, the first electromagnetic valve 13 is opened, and the second electromagnetic valve 14 is closed; at this time, only one water tank 2 is used in the water supply system. , water does not reduce the heating or cooling time through the water storage tank 8. The water flow switch 4 is controlled by the safety valve 10; when the safety valve 10 is opened, the water flow switch 5 is automatically replenished and closed by the tap water pressure, the water pump 3 is closed, and the water directly passes through the hot and cold water heat exchanger 6 for heat exchange, saving the use of the water pump 3 Electric energy; when the safety valve 10 is closed, the water flow switch 5 is disconnected, and the water pump 3 is opened.

Claims (7)

1. A double water tank heat exchange water supply system, including water tanks (2), water pumps (3), check valves (4) and hot and cold water heat exchangers ( 6), which is characterized in that a temperature sensor (7) is installed in the water tank, and a water storage tank (8) is bypassed between the water tank and the hot and cold water heat exchanger, and the cold and hot water heat exchanger is controlled by switching the solenoid valve and the water The tank is connected directly or through the water storage tank; the cold water inlet pipe (9) and the water flow switch (5) are also arranged between the check valve and the hot and cold water heat exchanger; the water pump, the cold and hot water heat exchanger, the temperature sensor, the electromagnetic The valve and water flow switch are connected to the central control system. 2. The double water tank heat exchange water supply system according to claim 1, characterized in that the water inlet end, the water outlet end of the water storage tank (8) and the circulation pipe (1) are respectively connected with water inlet pipes (11) and The water outlet pipe (12); wherein the water inlet pipe is connected to the water outlet end of the hot and cold water heat exchanger (6) through the circulation pipe, and the water outlet pipe is connected to the water inlet end of the water tank (2) through the circulation pipe. 3. The double water tank heat exchange water supply system according to claim 2, characterized in that the solenoid valve includes a first solenoid valve (13) and a second solenoid valve (14), wherein the first solenoid valve is set in the circulation pipe ( 1) Downstream of the junction with the water inlet pipe (11), the second solenoid valve is set on the water inlet pipe. 4. The double water tank heat exchange water supply system according to any one of claims 1-3, characterized in that a safety valve (10) is set on the cold water inlet pipe (9). 5. The double water tank heat exchange water supply system according to claim 4, characterized in that the cold and hot water heat exchanger (6) is externally connected with heat pump cold and hot water equipment; the water tank (2) is also provided with a water supply outlet (2.1 ), the water supply outlet is externally connected to the shower, faucet, and bathtub water equipment. 6. The control method of the double water tank heat exchange water supply system according to claim 5, characterized in that it comprises the following steps: 1) Detect the working status of the temperature sensor (7) and the water flow switch (5), and judge the execution of steps 2, 3 or 4; 2) If the temperature T of the water in the water tank (2) ≥ the temperature t set by the user, and the water flow switch is closed, the first solenoid valve (13) is closed, and the second solenoid valve (14) is opened; 3) If the temperature T of the water in the water tank ≥ the temperature t set by the user, and the water flow switch is off, both the first solenoid valve and the second solenoid valve are closed; 4) If the temperature T of the water in the water tank is less than the temperature t set by the user, and the water flow switch is turned off or closed, the first solenoid valve will be opened and the second solenoid valve will be closed. 7. The control method of the double water tank heat exchange water supply system according to claim 6, characterized in that the water flow switch (5) is controlled by a safety valve (10); when the safety valve is opened, the water flow switch is closed, and the water pump (3 ) is closed; when the safety valve is closed, the water flow switch is disconnected and the water pump is opened.

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