CN218493768U - Sand filter and control system thereof - Google Patents

Abstract

A sand filter and a control system thereof are provided. The sand filter includes a water pump and a sand cartridge fluidly coupled to the water pump. The water pump is coupled with the motor. The control system includes: the temperature sensor is arranged at a water outlet of the water pump and used for detecting the water temperature at the water outlet and outputting a water temperature detection signal; the water pressure sensor is arranged in a pipeline between the water pump and the sand cylinder and used for detecting water pressure capable of reflecting the using condition of the sand cylinder and outputting a water pressure detection signal; the current sensor is coupled with the motor and used for detecting the working current of the motor; and the controller is electrically coupled with the motor, the temperature sensor, the water pressure sensor and the current sensor respectively, and receives the water temperature detection signal from the temperature sensor, the water pressure detection signal from the water pressure sensor and the current detection signal from the current sensor.

Description

Sand filter and control system thereof

Technical Field

The utility model relates to a control system for sand filter to and a sand filter including this control system.

Background

At present, after a period of use of products of the swimming pool type, the water quality of the water in the pool is deteriorated, and dirt is deposited in the pool, so that filtering equipment is required to filter the water in the pool. As the accumulation of dirt in the pool water becomes severe, the pressure in the filter cartridge of the filtering apparatus increases, and the filtering effect is reduced, thereby causing energy waste. To this end, the solution among the prior art is to set up the manometer that is arranged in the cartridge filter of detection filtration equipment, and the user judges whether too big pressure in the cartridge filter through observing the manometer to whether need wash the cartridge filter or update the filter core based on this decision. Like this, need the user often to observe the manometer, brought the trouble for the user from this, still have the problem that probably can't wash the cartridge filter in time or change the filter core moreover. In addition, existing filtration devices lack a reliable safety protection mechanism, for example, when the pressure in the filter cartridge is too high for a long time, there is a safety hazard.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problems in the prior art, according to one aspect of the present invention, a control system for a sand filter is provided. The sand filter includes a water pump and a sand cartridge fluidly coupled to the water pump. The water pump is coupled with the motor. The control system includes: the temperature sensor is arranged at a water outlet of the water pump and used for detecting the water temperature at the water outlet and outputting a water temperature detection signal; the water pressure sensor is arranged in a pipeline between the water pump and the sand cylinder and used for detecting water pressure capable of reflecting the using condition of the sand cylinder and outputting a water pressure detection signal; the current sensor is coupled with the motor and used for detecting the working current of the motor; and the controller is electrically coupled with the motor, the temperature sensor, the water pressure sensor and the current sensor respectively, and receives the water temperature detection signal from the temperature sensor, the water pressure detection signal from the water pressure sensor and the current detection signal from the current sensor.

In one embodiment, the controller has: a water pressure abnormality detection mode for generating a water pressure abnormality signal based on the water pressure detection signal and a predetermined water pressure threshold value and controlling the motor to stop; a water-free protection mode for generating a water-free abnormal signal based on a predetermined first current threshold value of the current detection signal and controlling the motor to stop; and a locked rotor protection mode for generating a locked rotor abnormal signal and controlling the motor to stop based on the current detection signal and a predetermined second current threshold value.

In an embodiment, the control system further comprises a communication unit electrically connected to the controller, the communication unit being configured to wirelessly communicate one or more of the current detection signal, the water pressure abnormality signal, the no-water abnormality signal, and the locked rotor abnormality signal to the outside.

In one embodiment, the control system further comprises a control panel electrically connected to the controller, and the control panel comprises: a temperature indicating lamp for displaying the detected water temperature; the alarm is used for sending out an alarm signal when the sand filter is abnormal; a switch for controlling the start or stop of the motor; and the networking indicator lamp is used for displaying the networking state of the control system.

In an embodiment, the sand filter includes a housing case, the controller is housed in the housing case, and the control panel is provided on a surface of the housing case.

In an embodiment, the control system further comprises one or more APPs in wireless communication connection with the communication unit, the water temperature detection signal, the water pressure abnormality signal, the no water abnormality signal, and the locked rotor abnormality signal are transmitted between the communication unit and the one or more APPs by wireless communication, and the one or more APPs are configured to remotely operate the electric motor.

According to another aspect of the utility model, a sand filter is provided, it includes: a water inlet for receiving pond water to be filtered; a coarse filtration unit fluidly coupled to the water inlet for coarse filtration of pond water; a water pump fluidly coupled with the coarse filtration unit; a sand cylinder for filtering the pond water passing through the coarse filtering unit; a multi-position valve fluidly coupled to the water pump; a water outlet for discharging pool water filtered by the sand cylinder and flowing out of the multi-position valve; and a control system as described above.

In an embodiment, the sand cartridge comprises the multi-position valve, and the multi-position valve is a six-position valve.

In an embodiment, the sand filter further comprises a receiving housing, the controller being received in the receiving housing.

In an embodiment, the sand filter further comprises a base, and the receiving case is fixed to the base.

Drawings

Fig. 1 is a schematic view of a sand filter according to an embodiment of the present invention.

Fig. 2 is a schematic block diagram of a control system of the sand filter of fig. 1 according to an embodiment of the present invention.

Fig. 3 is a circuit example of a water temperature detection auxiliary circuit of the control system in fig. 2 according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 schematically illustrates a sand filter 100 according to an embodiment of the present invention. The sand filter 100 is adapted to filter pool water of the pool, i.e., pump the pool water into the sand filter 100, filter the pool water in the sand filter 100, and drain the filtered pool water back into the pool. The sand filter 100 can be adapted for use with a variety of basins, such as an above-ground moving basin, a pneumatic basin, and the like. The arrows in fig. 1 show the direction of water flow during filtration.

Fig. 2 schematically illustrates a control system 20 for a sand filter 100 according to an embodiment of the present invention. Referring to fig. 1 and 2, a sand filter 100 includes a body 10 and a control system 20.

The body 10 includes: a water inlet 11, a coarse filtration unit 12, a water pump (not shown), a base 13, a multi-position valve 14, a sand cylinder 15, an internal pipe 16, a water outlet 17 and a receiving case 18. Some components of the sand filter 100 are fixed to the base 13 or supported by the base 13. For example, a part of the piping for housing the case 18 and the sand filter 100 is fixed to the base 13. The storage case 18 is fixed to the base 13. The housing case 13 houses a part of the functional components of the control system 20. On the surface of the storage case 13, part of the functional components of the control system 20 are arranged.

Referring to fig. 1, a water inlet 11 receives pond water to be filtered. A coarse filtering unit 12 is coupled to the water inlet 11 for coarsely filtering the pond water flowing in from the water inlet 11, for example, filtering out large impurities (e.g., leaves) in the pond water. A water pump is coupled to the coarse filtration unit 12 for pumping the coarse filtered pond water into the subsequent filtration flow path. The strained pond water is then pumped into the multi-position valve 14. The multi-position valve 14 is, for example, a six-position valve having six valve positions corresponding to: normal filtration, back flushing (e.g., to drain the sand drum 15 of dirt), line cleaning, draining, circulation without sand drum, and shut down (e.g., to shut down the filtration function). At this time, the multi-position valve 14 is in a valve position corresponding to normal filtration, and the pond water flows into the sand drum 15 through the multi-position valve, and is filtered in the sand drum 15, for example, by multi-filtration through quartz sand in the sand drum 15. Filtered pond water is returned to the multi-position valve 14 via internal line 16. At this point, the multi-position valve 14 is in a valve position corresponding to the drain. Filtered pond water flows from the multi-position valve 14 to the outlet 17 and drains from the outlet 17 into the pond.

Referring to fig. 2, the control system 20 includes a motor assembly 21, a current sensor 22, a temperature sensor 23, a water pressure sensor 24, and a controller 25.

The motor assembly 21 is electrically connected to the controller 25. The motor assembly 21 includes a motor 211 and a driving unit 212. The motor 211 powers the water pump of the sand filter, e.g., as a power source for the water pump. In one embodiment, the motor 211 is a brushless dc motor. The driving unit 212 controls the start and stop of the motor 211 under the control of the controller 25, and provides an energization phase sequence to the motor 211.

The current sensor 22 is electrically connected to the motor assembly 21 and the controller 25, respectively. The current sensor 22 detects an operating current of the motor 211, for example, detects a phase current of the motor 211. The current sensor 211 outputs a current electrical measurement signal to the controller 25.

The temperature sensor 23 is arranged at the water outlet of the water pump and used for detecting the water temperature at the water outlet. The sensed water temperature may be considered the temperature of the pool water. The temperature sensor 23 is electrically connected to the controller 25 and outputs a water temperature detection signal to the controller 25.

In one embodiment, a temperature detection auxiliary circuit is connected between the temperature sensor 23 and the controller 25 for converting the water temperature detection signal output by the temperature sensor 23 into a signal suitable for the controller 25 to receive.

Fig. 3 shows an example of the temperature detection auxiliary circuit. Referring to fig. 3, the temperature detection auxiliary circuit includes an interface P2 to which the temperature sensor 23 is connected, a resistor R34, a resistor R35, a capacitor C34, and a diode D4. One end of the resistor R34 is connected to a power supply (e.g., a 3.3V power supply), the other end of the resistor R34 is connected to the cathode of the diode D4, and the anode of the diode D4 is grounded. The resistor R35 is connected between the interface P2 and the controller 25, and has one end connected to the interface P2 and the other end (AIN _ T1) connected to the controller 25, for example. One end of the interface P2 is connected to the other end of the resistor R34, and the other end of the interface P2 is grounded. One end of the capacitor C34 is connected to one end of the resistor R35, and the other end of the capacitor C34 is grounded.

A water pressure sensor 24 is provided in the communication line between the water pump and the sand drum 15 for detecting the water pressure in the communication line, which can reflect the water pressure in the sand drum 15. This water pressure can characterize the impurity conditions in the sand cylinder 15 because if the impurities in the sand cylinder 15 are excessive, the water flow out of the sand cylinder 15 is small and the water flow into the sand cylinder 15 is relatively large, so that a feedback signal will occur, i.e. the water pressure sensor 24 detects a high water pressure.

In one embodiment, similar to the water temperature detection auxiliary circuit, a water pressure detection auxiliary circuit is connected between the water pressure sensor 24 and the controller 25 for converting a water pressure detection signal output from the water pressure sensor 24 into a signal suitable for the controller 25 to receive.

The controller 25 has a water pressure abnormality detection mode, a no-water protection mode, and a locked rotor protection mode. Thus, the control system 20 according to the embodiment of the present invention has an abnormality protection function that provides protection for the sand filter 100 when an abnormality occurs.

In the water pressure abnormality detection mode, the controller 25 determines whether the detected water pressure is greater than a predetermined water pressure threshold value based on the water pressure detection signal and the predetermined water pressure threshold value, and if the detected water pressure is greater than the predetermined water pressure threshold value, it indicates that impurities in the sand drum are excessive, and if the filtering operation is continued, the filtering efficiency is reduced, resulting in energy waste. At this time, the controller 25 generates a water pressure abnormality signal and controls the motor to be stopped, for example, by controlling the driving unit to stop the motor.

In the no-water protection mode, the controller 25 determines whether the detected current is continuously lower than a first current threshold for a predetermined first time period based on the current detection signal and the predetermined first current threshold, and if the determination result is affirmative, generates a no-water abnormal signal and controls the motor to stop.

In the locked-rotor protection mode, the controller 25 determines whether the detected current is continuously lower than a predetermined second current threshold for a predetermined second period of time based on the current detection signal and the predetermined second current threshold, and if the determination result is affirmative, generates a locked-rotor abnormal signal and controls the motor to stop.

It will be appreciated that the predetermined thresholds or predetermined time periods are predetermined and may be adjusted based on user requirements or specific application scenarios.

It will be appreciated that controller 25 may be implemented within one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), data Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, state machines, gate logic, discrete hardware circuits, electronic units designed to perform the functions thereof, or a combination thereof.

In one embodiment, the control system 20 further comprises a communication unit 26. The communication unit 26 is electrically connected to the controller 25. The communication unit 26 is also in wireless communication connection with a user equipment UE (e.g. a smartphone of a user of a sand filter or pool). The wireless connection between the communication unit 26 and the user equipment may include wifi, and may also include other suitable wireless communication means. When the water pressure abnormality occurs, the controller 25 transmits the generated water pressure abnormality signal to the communication unit 26, and the communication unit 26 transmits the water pressure abnormality signal to the user equipment UE by wireless communication. Similarly, when a water-free abnormality occurs, the controller 25 transmits the generated water-free abnormality signal to the communication unit 26, and the communication unit 26 transmits the water-free abnormality signal to the user equipment UE by way of wireless communication. Similarly, when the locked-rotor abnormality occurs, the controller 25 transmits the generated locked-rotor abnormality signal to the communication unit 26, and the communication unit 26 transmits the locked-rotor abnormality signal to the user equipment UE by means of wireless communication.

In one embodiment, the control system 20 further includes a control panel 27. The control panel 27 includes a temperature display 271, a networked indicator light 272, a switch 273, and an alarm 274. The temperature display 271 is used to display the detected water temperature. The temperature display 271 is, for example, an 8-segment LED nixie tube. The networking indicator light 272 is used to display the networking status of the control system 20, for example, the networking status of the communication unit 26. The networking indicator 272 may include a plurality of light colors that each indicate one of a plurality of networking conditions. The networking indicator 272 may also include a plurality of states (e.g., normally on, light off, flash), each indicating one of a plurality of networking states. The plurality of networking states may include a normal connection state, a disconnection state, an upgrade state, and a distribution network state. The switch 272 is operated by a user to enable or disable the motor. The alarm 274 emits an alarm signal, such as a sound and light alarm, in the presence of one or more of the above-mentioned anomalies. The user can operate the switch 273 to stop the motor after seeing or hearing the alarm signal.

In one embodiment, the controller, the water temperature detection auxiliary circuit, the water pressure detection circuit and the drive unit are housed in a housing case, for example, they are provided on one or more circuit boards housed in the housing case. Control panel sets up on the surface of accomodating the casing to make things convenient for the user to look over and operate.

In one embodiment, the control system 20 further includes an APP (application) 28 in wireless communication connection with the communication unit 26. The APP 28 may include one or more. In the case where the APP includes a plurality of APPs, they are respectively provided in one of the plurality of user equipments, that is, the communication unit 26 is capable of communicating with the APPs of the plurality of user equipments respectively. When one or more of the above abnormalities occur, a corresponding abnormality signal is transmitted to the APP 28 through the communication unit 26 in a wireless communication manner. For example, upon occurrence of a water pressure abnormality, the communication unit 26 wirelessly transmits a water pressure abnormality signal to the APP 28. Upon the occurrence of the waterless abnormality, the communication unit 26 wirelessly transmits a waterless abnormality signal to the APP 28. Upon occurrence of a locked rotor abnormality, the communication unit 26 wirelessly transmits a locked rotor abnormality signal to the APP 28. When the APP 28 receives the abnormality signal, the user can remotely control the motor stop by operating the APP 28.

In addition, the communication unit 26 also wirelessly transmits the water temperature detection signal and the water pressure detection signal to the APP 28. In this way, the user can know the water temperature and water pressure conditions timely and conveniently through the APP 28.

In addition, according to the embodiment of the utility model, a salt electrolysis control system and/or a water quality detection system can be combined to enrich the whole set of system functions.

Therefore, according to the utility model discloses an embodiment possesses multiple protect function, and the security is high. When abnormal conditions occur, the user can be reminded in time, so that invalid filtration is avoided, the sand filter is cleaned, and the good water quality of the water tank is ensured. The user does not need to frequently observe a pressure gauge or a temperature display, and can master the water temperature and water pressure information at any time at the user equipment end.

While the foregoing describes certain embodiments, these embodiments are presented by way of example only, and are not intended to limit the scope of the present invention. The appended claims and their equivalents are intended to cover all such modifications, substitutions and changes as fall within the true scope and spirit of the application.

Claims (10)

1. A control system for a sand filter, the sand filter including a water pump and a sand canister fluidly coupled to the water pump, the water pump coupled to a motor, the control system comprising:

the temperature sensor is arranged at a water outlet of the water pump and used for detecting the water temperature at the water outlet and outputting a water temperature detection signal;

the water pressure sensor is arranged in a pipeline between the water pump and the sand cylinder and used for detecting water pressure capable of reflecting the using condition of the sand cylinder and outputting a water pressure detection signal;

the current sensor is coupled with the motor and used for detecting the working current of the motor; and

a controller electrically coupled to the motor, the temperature sensor, the water pressure sensor, and the current sensor, respectively, the controller receiving the water temperature detection signal from the temperature sensor, the water pressure detection signal from the water pressure sensor, and the current detection signal from the current sensor.

2. The control system of claim 1, wherein the controller has:

a water pressure abnormality detection mode for generating a water pressure abnormality signal based on the water pressure detection signal and a predetermined water pressure threshold value and controlling the motor to stop;

a water-free protection mode for generating a water-free abnormal signal based on a predetermined first current threshold value of the current detection signal and controlling the motor to stop; and

and generating a locked-rotor abnormal signal based on the current detection signal and a preset second current threshold value, and controlling a locked-rotor protection mode for stopping the motor.

3. The control system of claim 2, further comprising a communication unit electrically connected to the controller, the communication unit being configured to send one or more of the current detection signal, the water pressure abnormality signal, the no-water abnormality signal, and the locked rotor abnormality signal to the outside in a wireless communication manner.

4. The control system of claim 1, further comprising a control panel electrically connected to the controller, and,

the control panel includes: a temperature indicating lamp for displaying the detected water temperature; the alarm is used for sending out an alarm signal when the sand filter is abnormal; a switch for controlling the start or stop of the motor; and the networking indicator lamp is used for displaying the networking state of the control system.

5. The control system of claim 4, wherein the sand filter includes a housing, the controller is housed in the housing, and the control panel is disposed on a surface of the housing.

6. The control system of claim 3, further comprising one or more APPs in wireless communication connection with the communication unit, the water temperature detection signal, the water pressure abnormality signal, the no water abnormality signal, and the locked rotor abnormality signal being transmitted between the communication unit and the one or more APPs by wireless communication, and the one or more APPs being configured to remotely operate the electric machine.

7. A sand filter, comprising:

a water inlet for receiving pond water to be filtered;

a coarse filtration unit fluidly coupled to the water inlet for coarse filtration of pond water;

a water pump fluidly coupled with the coarse filtration unit;

a sand cylinder for filtering the pond water passing through the coarse filtering unit;

a multi-position valve fluidly coupled to the water pump;

the water outlet is used for discharging pool water which is filtered by the sand cylinder and flows out of the multi-position valve; and

the control system of any one of claims 1-6.

8. The sand filter of claim 7, wherein the sand cartridge comprises the multi-position valve and the multi-position valve is a six-position valve.

9. A sand filter as claimed in claim 7, further comprising a receiver housing in which the controller is received.

10. A sand filter as claimed in claim 9, further comprising a base to which the receiver housing is secured.

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