CN212623762U - Liquid level control system - Google Patents
Liquid level control system Download PDFInfo
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- CN212623762U CN212623762U CN202021318169.9U CN202021318169U CN212623762U CN 212623762 U CN212623762 U CN 212623762U CN 202021318169 U CN202021318169 U CN 202021318169U CN 212623762 U CN212623762 U CN 212623762U
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Abstract
The utility model discloses a liquid level control system, include: a low pressure pump; a high pressure pump; a first liquid level detector for detecting that the liquid level reaches an initial liquid level to generate a first liquid level detection signal; the first control module is used for receiving the first liquid level detection signal and controlling the low-pressure pump and the high-pressure pump to start in sequence according to the first liquid level detection signal; a second liquid level detector for detecting that the liquid level reaches an end level to control the low pressure pump and the high pressure pump to be turned off. The utility model discloses a when first liquid level was examined and is detected the liquid level and reachd initial liquid level, first control module control low-pressure pump and high-pressure pump start, then when second liquid level detection ware detects the liquid level and reachs the end liquid level, close low-pressure pump and high-pressure pump for liquid level control is automatic, and the operation is simple and easy and uses manpower sparingly.
Description
Technical Field
The utility model belongs to the technical field of liquid level control's technique and specifically relates to a liquid level control system is related to.
Background
At present, the working process of an industrial water purifier comprises pretreatment, fine treatment and post-treatment, wherein a low-pressure pump is generally arranged at the front end of the water purifier to supply water and pressurize to the front end of the water purifier, so that tap water smoothly passes through the water purifier to carry out the pretreatment in the early stage, and then a high-pressure pump is arranged to enable filtered water in the water purifier to smoothly pass through a reverse osmosis membrane.
At present, the control modes of the high-pressure pump and the low-pressure pump mainly comprise PLC control and manual control, wherein the PLC control mode controls the high-pressure pump and the low-pressure pump to be opened and closed through program instructions, the control mode is high in consumption, complex in wiring and high in equipment cost. However, manual control is labor-consuming and prone to operator error.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a level control system can start according to liquid level control low-pressure pump and high-pressure pump for low-pressure pump and high-pressure pump automatic control, use manpower sparingly.
An embodiment of the utility model provides a liquid level control system, include:
a low pressure pump;
a high pressure pump;
a first liquid level detector for detecting that the liquid level reaches an initial liquid level to generate a first liquid level detection signal;
the first control module is used for receiving the first liquid level detection signal and controlling the low-pressure pump and the high-pressure pump to start in sequence according to the first liquid level detection signal;
a second liquid level detector for detecting that the liquid level reaches an end level to control the low pressure pump and the high pressure pump to be turned off.
The utility model discloses liquid level control system has following beneficial effect at least: when detecting the liquid level and reaching the initial liquid level through first liquid level, first control module control low-pressure pump and high-pressure pump start, then when second liquid level detector detects the liquid level and reaches the end liquid level, control low-pressure pump and high-pressure pump and close, and then make liquid level control automatic, the operation is simple and easy and uses manpower sparingly.
According to the utility model discloses a liquid level control system of other embodiments, first control module includes:
the low-pressure control unit is used for receiving the first liquid level detection signal and outputting a low-pressure control signal to control the low-pressure pump to start;
the delay control unit is used for receiving the first liquid level detection signal and outputting a delay control signal;
and the high-pressure control unit is used for receiving the delay control signal and outputting a high-pressure control signal to control the high-pressure pump to start.
According to the utility model discloses a liquid level control system of other embodiments still includes:
and the second control module is used for outputting a second control signal so as to control the low-pressure pump and the high-pressure pump to be started or closed.
According to the utility model discloses a liquid level control system of other embodiments, the low pressure control unit includes: a first relay;
a coil of the first relay is connected to the first liquid level detector;
and the first end of a normally open contact of the first relay is connected with a power supply, and the second end of the normally open contact of the first relay is connected with the low-pressure pump and the time delay control unit.
According to the utility model discloses a liquid level control system of other embodiments, the time delay control unit includes: a time delay relay;
the coil of the time delay relay is connected with the normally open contact of the first relay;
and the first end of a normally open contact of the time delay relay is connected with a power supply, and the second end of the normally open contact of the time delay relay is connected with the low-voltage control unit.
According to the utility model discloses a liquid level control system of other embodiments, high pressure control unit includes: a second relay;
the coil of the second relay is connected with the normally open contact of the time delay relay;
and one end of a normally open contact of the second relay is connected with a power supply, and the other end of the normally open contact of the second relay is connected with the high-pressure pump.
According to the utility model discloses a liquid level control system of other embodiments, the second control module includes:
the first control switch is connected between a power supply and the first control module and used for controlling the first control module to stop working;
and the second control switch is connected between a power supply and the low-voltage control unit and between the power supply and the time delay control unit and is used for controlling the low-voltage control unit and the time delay control unit to start.
According to other embodiments of the present disclosure, the first control switch is a normally closed switch, and the second control switch is a normally open switch;
one end of the normally closed switch is connected with a power supply, the other end of the normally closed switch is connected with one end of the second liquid level detector, and the other end of the second liquid level detector is connected with the first liquid level detector and a normally open contact of the first relay;
one end of the normally open switch is connected with the second liquid level detector, and the other end of the normally open switch is connected with the coil of the first relay and the coil of the time delay relay.
According to the utility model discloses a liquid level control system of other embodiments, the coil connection of first relay has first overheat protector, the coil connection of second relay has the second overheat protector.
According to further embodiments of the liquid level control system of the present invention, the first liquid level detector is a normally open type liquid level switch, the second liquid level detector is a normally closed type liquid level switch,
when the liquid level is at the initial liquid level, the first liquid level detector is closed;
when the liquid level is at the end level, the second liquid level detector is switched off.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a block diagram of an embodiment of a fluid level control system according to the present invention;
FIG. 2 is a block diagram of another embodiment of a fluid level control system according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the liquid level control system according to the present invention.
Reference numerals: 100. a low pressure pump; 200. a high pressure pump; 300. a first liquid level detector; 400. a first control module; 410. a low-voltage control unit; 420. a delay control unit; 430. a high voltage control unit; 500. a second liquid level detector; 600. and a second control module.
Detailed Description
The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
After the water purifier needs to carry out pretreatment systems such as a PP (polypropylene) filter element, a pretreatment activated carbon unit, a water softener and the like on tap water, the impurity content of suspended matters, colloids, organic matters, hardness, microorganisms and the like in the water is greatly reduced, and then the tap water is treated by a plurality of groups of fine treatment systems such as reverse osmosis and the like.
Wherein, a pure water tank is generally arranged beside the pure water machine, the pure water tank is provided with high and low liquid levels, the high and low liquid levels in the pure water tank are used for controlling the starting or closing of the pure water machine, a low pressure pump and a high pressure pump are arranged in the pure water machine for controlling the input and output of tap water, and the control of the starting or closing of the pure water machine is equivalent to the control of the starting or closing of the low pressure pump and the high pressure pump. At present, the low-pressure pump and the high-pressure pump are generally started or closed by adopting PLC program control, but the PLC program control needs programming and has complex wiring, so that the cost of the water purifier is increased. If the liquid level in the pure water tank needs to be monitored all the time in a manual mode, then the low-pressure pump and the high-pressure pump are manually started, and then the low-pressure pump and the high-pressure pump are manually closed, manpower is consumed.
The application is applied to the purification treatment process in the water purification machine, and can be applied to the water storage system who adopts low-pressure pump and high-pressure pump, controls the liquid level height through controlling the start-up of low-pressure pump and high-pressure pump respectively. Through the liquid level control system of this application for low-pressure pump and high-pressure pump automatic start and close, realize that liquid level control's operation is simple and easy.
Referring to fig. 1, the embodiment of the utility model discloses a liquid level control system, include: the hydraulic system comprises a low-pressure pump 100, a high-pressure pump 200, a first liquid level detector 300, a first control module 400 and a second liquid level detector 500, wherein the first liquid level detector 300 is used for detecting that a liquid level reaches an initial liquid level to generate a first liquid level detection signal, the first control module 400 is used for receiving the first liquid level detection signal and controlling the low-pressure pump 100 and the high-pressure pump 200 to be started in sequence according to the first liquid level detection signal, and the second liquid level detector 500 is used for detecting that the liquid level reaches an end liquid level to control the low-pressure pump 100 and the high-pressure pump 200 to be closed.
The first liquid level detector 300 detects an initial liquid level, and the second liquid level detector 500 detects an end liquid level, wherein the initial liquid level and the end liquid level are set as required, and the volume of water to be added can be determined through the initial liquid level and the end liquid level.
Whether the liquid level is at the initial liquid level is detected by the first liquid level detector 300, and if the detected liquid level is the initial liquid level, the first control module 400 controls the low pressure pump 100 and the high pressure pump 200 to be started in sequence. The second level detector 500 then detects whether the liquid level reaches an end level, and controls the low pressure pump 100 and the high pressure pump 200 to be turned off if the liquid level reaches the end level. Therefore, the first liquid level detector 300, the second liquid level detector 500 and the first control module 400 are arranged, so that the liquid level control is automatic, the operation is simple and easy, and the labor is saved.
Referring to fig. 2, in some embodiments, the first control module 400 includes: the low pressure control unit 410 is used for receiving the first liquid level detection signal and outputting a delay control signal, the high pressure control unit 430 is used for receiving the delay control signal and outputting a high pressure control signal to control the high pressure pump 200 to start.
When the first liquid level detector 300 detects that the liquid level reaches the initial liquid level, the first liquid level detector 300 outputs a first liquid level detection signal to the low pressure control unit 410, the low pressure control unit 410 receives the first liquid level detection signal and outputs a low pressure control signal to the low pressure pump 100 and the delay control unit 420, the low pressure pump 100 is started according to the low pressure control signal, the delay control unit 420 receives the first liquid level detection signal and outputs a delay control signal to the high pressure control unit 430, the high pressure control unit 430 receives the delay control signal and outputs a high pressure control signal to the high pressure pump 200, and the high pressure pump 200 is started according to the high pressure control signal. Therefore, the low-pressure pump 100 and the high-pressure pump 200 are started in sequence by arranging the low-pressure control unit 410, the time delay control unit 420 and the high-pressure control unit 430, so that the low-pressure pump 100 and the high-pressure pump 200 are started automatically, the operation is simple and the labor is saved.
In some embodiments, the liquid level detection system further comprises: the main switch QF1 and the main switch QF1 are connected with a power supply, and the power supply and the liquid level detection system are controlled to be started or shut down through the main switch QF 1. The power supply is three-phase power supply, and therefore the power supply consists of three live wires and one zero wire. The high-pressure pump 200 and the low-pressure pump 100 are connected with a power supply, a low-pressure control unit 410 is arranged between the low-pressure pump 100 and the power supply, and a high-pressure control unit 430 is arranged between the high-pressure pump 200 and the power supply. When the main switch QF1 is closed, the low pressure pump 100 is controlled to be turned on or off by the low pressure control unit 410, and the high pressure pump 200 is controlled to be turned on or off by the high pressure control unit 430, so that the operation of turning on or off the low pressure pump 100 and the high pressure pump 200 is simplified.
Wherein the hot line corresponds to the power source and the three or hot lines are U, V, W. The first liquid level detector 300 is a normally open type liquid level switch, the second liquid level detector 500 is a normally closed type switch, and when the liquid level is at the initial liquid level, the first liquid level detector 300 is closed; when the liquid level is at the end level, the second liquid level detector 500 is turned off. One end of the first liquid level detector 300 is connected to the live line and the other end is connected to the low pressure control unit 410. The second liquid level detector 500 has one end connected to the fire line and the other end connected to the first liquid level detector 300.
When the first liquid level detector 300 detects that the liquid level reaches the initial liquid level, the first liquid level detector 300 is closed, the low pressure control unit 410 starts to output a low pressure control signal, and the low pressure pump 100 is started. The delay control unit 420 receives the low voltage control signal to output a delay control signal to the high voltage control unit 430, and the high voltage control unit 430 receives the delay control signal to control the high voltage pump 200 to start. Therefore, when the first liquid level detector 300 is closed, the low pressure pump 100 and the high pressure pump 200 are started in sequence, and the whole starting process is automatic, easy to operate and labor-saving.
Referring to fig. 2 and 3, in some embodiments, the low pressure control unit 410 includes: a first relay KM1, a coil of the first relay KM1 is connected to the first liquid level detector 300, a first end of a normally open contact of the first relay KM1 is connected to a power supply, and a second end is connected to the low pressure pump 100 and the delay control unit 420.
When the liquid level detected by the first liquid level detector 300 reaches the initial liquid level, the first liquid level detector 300 is closed, after the first relay KM1 is electrified, the normally open contact of the first relay KM1 is closed, the low-pressure pump 100 is started after being connected with a power supply, self-locking is realized, and meanwhile, the delay control unit 420 is started, so that the operation of controlling the starting of the low-pressure pump 100 is simple and easy.
The delay control unit 420 includes: a time delay relay KT; a coil of the time delay relay KT is connected with a normally open contact of the first relay KM 1; the first end of the normally open contact of the time delay relay KT is connected with a power supply, the second end is connected with the high-voltage control unit 430, and the first end of the normally open contact of the time delay relay KT is connected with the power supply and is also connected with a live wire.
When the first liquid level detector 300 is closed, after the coil of the time delay relay KT is electrified, the normally open contact of the time delay relay KT is closed in a time delay manner, and the high-voltage control unit 430 is started in a time delay manner, so that the high-voltage control unit 430 is started simply and easily.
In the embodiment, the delay time of the normally open contact of the delay relay KT is 5s, when the coil of the delay relay KT is energized, and after 5s, the normally open contact of the delay relay KT is closed, and then the high-voltage control unit 430 is normally started.
The high voltage control unit 430 includes: a second relay KM 2; a coil of the second relay KM2 is connected with a normally open contact of the time delay relay KT; one end of a normally open contact of the second relay KM2 is connected with a power supply, and the other end is connected with the high-pressure pump 200.
After the normally open contact of the time-delay relay KT is closed, the coil of the second relay KM2 is electrified, the normally open contact of the second relay KM2 is closed, the high-pressure pump 200 is started, and self-locking is realized.
Therefore, by arranging the first relay KM1, the time delay relay KT and the second relay KM2, when the first liquid level detector 300 detects that the liquid level reaches the initial liquid level, the first liquid level detector 300 is closed, the low-pressure pump 100 is started after the first relay KM1 is electrified, then the time delay relay KT is closed after the time delay, and the high-pressure pump 200 is started after the second relay KM2 is electrified. The low pressure pump 100 and the high pressure pump 200 are sequentially closed to complete the pre-treatment of the pure water machine.
In some embodiments, a first overheat protector is connected to the coil of the first relay KM1, a second overheat protector is connected to the coil of the second relay KM2, and the first overheat protector is disposed between the coil of the first relay KM1 and the neutral line, and the neutral line is N, and the second overheat protector is disposed between the coil of the second relay KM2 and the neutral line. The first relay KM1 is protected from working normally by arranging a first overheat protector, so that the first relay KM1 and the low-voltage pump 100 are prevented from being burnt out by high voltage. The second overheat protector protects the second relay KM2 from working normally, so as to prevent the second relay KM2 and the high-pressure pump 200 from being burned out by high pressure.
Referring to fig. 1 and 3, in some embodiments, the fluid level control system further includes a second control module 600, the second control module 600 configured to output a second control signal to control the low pressure pump 100 and the high pressure pump 200 to turn on or off.
The second control module 600 is arranged to manually control the low-pressure pump 100 and the high-pressure pump 200 to be started or closed, so that the low-pressure pump 100 and the high-pressure pump 200 can be started or closed at any time to meet different requirements of the low-pressure pump 100 and the high-pressure pump 200.
The second control module 600 includes: a first control switch SB1 and a second control switch SB2, a first control switch SB1 connected between the power supply and the first control module 400 for controlling the first control module 400 to stop working; and a second control switch SB2 connected between the power supply and the low voltage control unit 410 and the delay control unit 420 for controlling the low voltage control unit 410 and the delay control unit 420 to be activated.
The power supply connected to the second control switch SB2 is live. The first control module 400 is manually controlled to stop operating by setting the first control switch SB1, and the low pressure pump 100 and the high pressure pump 200 are controlled to be turned off. The low-pressure control unit 410 and the time delay control unit 420 are controlled to be started through the second control switch SB2, so that the low-pressure pump 100 and the high-pressure pump 200 are manually started. The low-pressure pump 100 and the high-pressure pump 200 can be opened and closed manually, and the low-pressure pump 100 and the high-pressure pump 200 can be adjusted and stopped according to actual conditions.
Specifically, the first control switch SB1 is a normally closed switch, and the second control switch SB2 is a normally open switch; one end of the normally closed switch is connected with a power supply, the other end of the normally closed switch is connected with one end of the second liquid level detector 500, and the other end of the second liquid level detector 500 is connected with the first liquid level detector 300 and a normally open contact of the first relay KM 1; one end of the normally open switch is connected with the second liquid level detector 500, and the other end of the normally open switch is connected with the coil of the first relay KM1 and the coil of the time delay relay KT.
When the low-pressure pump 100 and the high-pressure pump 200 need to be controlled to be turned off during the starting process of the low-pressure pump 100 and the high-pressure pump 200, the normally closed switch is opened, the first relay KM1 and the second relay KM2 are simultaneously opened, and the low-pressure pump 100 and the high-pressure pump 200 stop working simultaneously. When the low-pressure pump 100 and the high-pressure pump 200 need to be controlled manually to start, the normally closed switch is restored to be in a closed state, the normally open switch is closed, the first relay KM1 and the delay relay KT are electrified, the low-pressure pump 100 is started, and after the delay time, the second relay KM2 is electrified, the high-pressure pump 200 is started, so that the low-pressure pump 100 and the high-pressure pump 200 are started in sequence. Therefore, by setting the normally closed switch and the normally open switch, the low pressure pump 100 and the high pressure pump 200 can be manually started and closed so as to meet different requirements of conditions.
After the low-pressure pump 100 is started, the high-pressure pump 200 is started after a delay time, so that the high-pressure pump 200 is prevented from being evacuated, and the high-pressure pump 200 is protected.
A liquid level control system according to an embodiment of the present invention is described in detail below in a specific embodiment with reference to fig. 1 and 2. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.
When the first liquid level detector 300 detects that the liquid level reaches the initial liquid level, the first liquid level detector 300 is closed, the coil of the first relay KM1 is electrified, then the normally open contact of the first relay KM1 is closed, the low-pressure pump 100 is started, and meanwhile the first relay KM1 is self-locked, so that the low-pressure pump 100 continuously works. Meanwhile, the coil of the time delay relay KT is also electrified, the normally open contact of the time delay relay KT is closed after the time delay, then the coil of the second relay KM2 is electrified, the normally open contact of the second relay KM2 is closed, meanwhile, the self-locking is realized by the second relay KM2, the normally open contact of the second relay KM2 is continuously closed, and then the high-pressure pump 200 continuously works, so that the whole water purifier starts to normally work. When the second liquid level detector 500 detects that the liquid level reaches the end level, the second liquid level detector 500 is turned off, and the entire first control module 400 is powered off, thereby stopping the operation of the low pressure pump 100 and the high pressure pump 200. The liquid level is detected to reach the initial liquid level and end the liquid level respectively through setting up first liquid level detector 300, second liquid level detector 500, then realizes the start-up of low-pressure pump 100 and high-pressure pump 200 through first relay KM1, time delay relay KT and second relay KM2 to satisfy the simple and easy and use manpower sparingly of control operation of different liquid level requirements. When the low-pressure pump 100 and the high-pressure pump 200 are working, the normally closed switches are turned off, and the whole first control module 400 is powered off, so that the low-pressure pump 100 and the high-pressure pump 200 stop working, and the purpose of manual shutdown is achieved. When manual starting is needed, the normally closed switch is restored to the closed state, and the normally open switch is closed, the first relay KM1 and the second relay KM2 are respectively electrified, and the low-pressure pump 100 and the high-pressure pump 200 are started in sequence, so that the purpose of starting at any time is achieved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A fluid level control system, comprising:
a low pressure pump;
a high pressure pump;
a first liquid level detector for detecting that the liquid level reaches an initial liquid level to generate a first liquid level detection signal;
the first control module is used for receiving the first liquid level detection signal and controlling the low-pressure pump and the high-pressure pump to start in sequence according to the first liquid level detection signal;
a second liquid level detector for detecting that the liquid level reaches an end level to control the low pressure pump and the high pressure pump to be turned off.
2. The fluid level control system of claim 1, wherein the first control module comprises:
the low-pressure control unit is used for receiving the first liquid level detection signal and outputting a low-pressure control signal to control the low-pressure pump to start;
the delay control unit is used for receiving the first liquid level detection signal and outputting a delay control signal;
and the high-pressure control unit is used for receiving the delay control signal and outputting a high-pressure control signal to control the high-pressure pump to start.
3. The fluid level control system of claim 2, further comprising:
and the second control module is used for outputting a second control signal so as to control the low-pressure pump and the high-pressure pump to be started or closed.
4. The fluid level control system of claim 3, wherein the low pressure control unit comprises: a first relay;
a coil of the first relay is connected to the first liquid level detector;
and the first end of a normally open contact of the first relay is connected with a power supply, and the second end of the normally open contact of the first relay is connected with the low-pressure pump and the time delay control unit.
5. The fluid level control system of claim 4, wherein the delay control unit comprises: a time delay relay;
the coil of the time delay relay is connected with the normally open contact of the first relay;
and the first end of a normally open contact of the time delay relay is connected with a power supply, and the second end of the normally open contact of the time delay relay is connected with the low-voltage control unit.
6. The fluid level control system of claim 5, wherein the high pressure control unit comprises: a second relay;
the coil of the second relay is connected with the normally open contact of the time delay relay;
and one end of a normally open contact of the second relay is connected with a power supply, and the other end of the normally open contact of the second relay is connected with the high-pressure pump.
7. The fluid level control system of claim 5, wherein the second control module comprises:
the first control switch is connected between a power supply and the first control module and used for controlling the first control module to be closed;
and the second control switch is connected between a power supply and the low-voltage control unit and between the power supply and the time delay control unit and is used for controlling the low-voltage control unit and the time delay control unit to start.
8. The fluid level control system of claim 7, wherein the first control switch is a normally closed switch and the second control switch is a normally open switch;
one end of the normally closed switch is connected with a power supply, the other end of the normally closed switch is connected with one end of the second liquid level detector, and the other end of the second liquid level detector is connected with the first liquid level detector and a normally open contact of the first relay;
one end of the normally open switch is connected with the second liquid level detector, and the other end of the normally open switch is connected with the coil of the first relay and the coil of the time delay relay.
9. The fluid level control system of claim 6, wherein a first overheat protector is connected to the coil of the first relay and a second overheat protector is connected to the coil of the second relay.
10. The fluid level control system according to any one of claims 1 to 8, wherein the first fluid level detector is a normally open type fluid level switch, the second fluid level detector is a normally closed type fluid level switch,
when the liquid level is at the initial liquid level, the first liquid level detector is closed;
when the liquid level is at the end level, the second liquid level detector is switched off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021318169.9U CN212623762U (en) | 2020-07-07 | 2020-07-07 | Liquid level control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021318169.9U CN212623762U (en) | 2020-07-07 | 2020-07-07 | Liquid level control system |
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| CN212623762U true CN212623762U (en) | 2021-02-26 |
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| CN202021318169.9U Active CN212623762U (en) | 2020-07-07 | 2020-07-07 | Liquid level control system |
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2020
- 2020-07-07 CN CN202021318169.9U patent/CN212623762U/en active Active
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