CN2358473Y - Water level controller for double pool - Google Patents

Abstract

Double tank water level controller, the collector of BG1 is connected to the relay J1, the collector of BG2 is connected to the relay J2, the normally closed contact J11 of the upper relay J1 and the normally open contact J21 of the lower relay J2 are connected in series to form an L-2 switch . BG1 controls the action of the upper relay J1, and BG2 controls the action of the lower relay J2, so that the L-2 switch realizes the low water level connection of the upper pool and the high water level disconnection; The utility model has the advantages of sensitive automatic control, reliability, convenient assembly and disassembly, and has the protection function of lightning protection.

Description

Double pool water level controller

The utility model relates to the technical field of automatic control, in particular to the control of water level.

In daily life, it is often necessary to transport water or liquid to a higher place. The general method is to use a pump to transport the liquid in the low pool to the high pool. In order to be able to run automatically and safely for a long time, it is necessary to set up an automatic control device. This device should be able to pump water automatically according to the water level of the upper and lower pools, that is, the upper pool starts at a low water level and stops at a high water level;

The above requirements can be achieved by installing floats and relays in the high and low pools and designing the control lines. But this kind of scheme is early stage, has the disadvantages such as bulky, difficult installation and adjustment, high cost and difficult maintenance. At present, the more advanced technology is to use imported IC parts. Using an IC and installing a water level probe in the pool can control the pumping action to meet the above requirements. This technology is advanced, small in size, easy to connect, low in cost and basically requires no maintenance. Its disadvantages are that there are malfunctions and it is easily damaged by induced lightning. The water level probe is easily oxidized and stained with scale, so it must be cleaned regularly.

The purpose of the utility model is to improve the imported IC, and replace the integrated circuit with two transistor circuits, which can achieve the same effect, without malfunction and has the function of lightning protection.

As shown in Figure 1 of the utility model, L and N provide AC power to the circuit, which is transformed into DC power required by the system through transformer B and bridge rectifier circuits D1, D2, D3, and D4. Two transistor circuits are used in the system, BG1 The collector of BG2 is connected to relay J1, the collector of BG2 is connected to relay J2, the normally closed contact J11 of the upper relay J1 and the normally open contact J21 of the lower relay J2 are connected in series to form an L-2 switch. BG1 controls the action of the upper relay J1 according to the water level of the upper pool, and BG2 controls the action of the lower relay J2 according to the water level of the lower pool, so that the L-2 switch realizes the connection of the low water level of the upper pool and the disconnection of the high water level; the disconnection of the low water level of the lower pool, the water level Turns on again after rising.

Below in conjunction with the example of Fig. 1 and Fig. 2, the utility model is further described:

Fig. 1 circuit structure diagram of the utility model,

Fig. 2 is the wiring diagram of the application example of the utility model.

Connect the L-2 line of the utility model to the interface line of the AC contactor C in series and use it as an automatic switch. The L terminal is connected to the phase line, and the N terminal is connected to the neutral line. L and N provide 220 volts of alternating current to the circuit board, and the transformer B And the bridge rectifier circuits D1, D2, D3, D4 convert the alternating current into direct current for use by the transistors BG1 and BG2. In the circuit, ground point 01 is externally connected to the water shortage electrode of the upper and lower pools, point 06 is externally connected to the high electrode of the upper pool, internally connected to the base of transistor BG1 after resistor R1, point 05 is externally connected to the low electrode of the upper pool, and internally connected to the normally open contact of relay J1 Point J12 is connected to the base of BG1 after resistor R1, the collector of BG1 is connected to relay J1, point 03 is externally connected to the high electrode of the sink, internally connected to the base of transistor BG2 through resistor R2, point 02 is externally connected to the low electrode of the sink , the normally open contact J22 of the relay J2 is connected internally and then connected to the base of BG2 through the resistor R2, and the collector of BG2 is connected to the relay J2. Connect the normally closed contact J11 of the upper relay J1 and the other normally open contact J21 of the lower relay J2 in series between L and 2. Its working principle is:

1. When there is no water in the upper pool or the water level is lower than the 05 electrode (water level probe), 01 and 06 are open, BG1 is cut off, the upper relay J1 is released, its normally closed contact J11 is closed, and the normally open contact J12 is opened.

2. When the water level of the lower pool is filled to the 03 electrode, the base of BG2 gets a positive bias (through the liquid in the pool), BG2 conducts, and the lower relay J2 pulls in, closing the normally open contacts J21 and J22. At this time, L- 2 Connect it to make the AC contactor C act, connect the water pump motor to make the water pump run, and supply water to the pool.

3. When the water level in the lower pool is lower than 03 but higher than 02, because J22 is closed at this time, BG2 can still get positive bias from 02 and continue to conduct, and the water pump continues to run to supply water to the upper pool.

4. When the water level of the lower pool is lower than the 02 electrode, the base of BG2 is powered off and cut off, the lower relay J2 is released, the normally open contacts J21 and J22 are disconnected, at this time L-2 is disconnected, and the AC contactor C is de-energized. The water pump stops.

5. When the water level of the lower pool is filled to the 03 electrode, repeat the second point.

6. When the water level of the upper pool rises to the 06 electrode, the base of BG1 gets a positive bias (through the liquid in the pool), BG1 conducts, the upper relay J1 pulls in, its normally closed contact J11 is disconnected, and the normally open contact J12 is closed, at this time L-2 is disconnected, the AC contactor C loses power, the water pump stops, and the water supply to the pool is stopped.

7. When the water level in the upper pool is lower than 06 but higher than 05, because J12 is closed at this time, BG1 can still get positive bias from 05 and continue to conduct, the water pump stops, and no water is supplied to the upper pool.

8. When the water level of the upper pool drops and leaves the 05 electrode, the base of BG1 is powered off and cut off, the upper relay J1 is released, its normally closed contact J11 is closed, the normally open contact J12 is opened, and L-2 is connected (the water level of the lower pool Between 02 and 03), the AC contactor C acts, and the water pump supplies water to the upper pool. If the water level in the lower pool is lower than 02, repeat point 4.

V01 and V02 in the figure are convex wave absorbers (varistors), which have the function of lightning protection. Connect one end of them to the high and low water level wires of the upper pool, and the other end to ground.

Claims (1)

1, two pool water level controllers, rectification circuit is arranged, transistor circuit and relay and level electrode are formed, it is characterized in that: the collector at transistor BG1 connects relay (J1), collector at transistor BG2 connects relay (J2) down, to go up the normally closed contact (J11) of relay (J1) and the normally opened contact (J21) of following relay (J2) and be concatenated into the L-2 switch, the transistor BG1 action that relay (J1) is gone up in control according to the upper pool water level, transistor BG2 is according to the sink water level control action of relay (J2) down, make the L-2 switch realize the connection of upper pool low-water level, high water stage disconnects, the sink low-water level disconnects, and recovers to connect after water level raises.