TWM514725U - Automatic water changing system - Google Patents

Abstract

An automatic water changing system includes an aquarium, a filter tank, a controller and a human machine interface (HMI). An inlet valve of the aquarium is disposed corresponding to an inlet pipeline. A drain valve is disposed corresponding to a drain pipeline. A pump of the filter tank is connected with a first connecting pipeline and pumped the water contained in a cabinet to a tank body by the first connecting pipeline. The water in the tank body overflowed to the cabinet by a second connecting pipeline. The controller controls the inlet valve, a drain valve and the pump ON/OFF, so as to control the water level of the tank body. A user can input setting parameters of the controller by the HMI, and automatic control the water changing time and the water changing volume of the aquarium by the control through the HMI.

Description

Automatic water exchange system

This creation is about an automatic water change system.

According to the current busy and busy society, people generally engage in various leisure activities, such as planting plants, keeping pets, exercising, and traveling, to relax the tight nerves; taking aquatic pets or planting aquatic plants as an example. Watching the fish swim in the aquarium can relax the tight nerves moderately. Therefore, it is often seen that people will arrange fish tanks at home, or raise fish or plant water plants as a profession.

While raising fish or planting water plants, the control of the water level and water quality of the fish tank is one of the top issues for raising fish or water plants. However, the control of the water level and water quality of the fish tank often requires a lot of labor, time and spirit, and a little carelessness may cause the place where the fish tank is placed to be wet or flooded, or even cause the fish or water grass to die. And if the fish is just an expensive fish species, or if the price of the water grass is high, the owner will suffer considerable losses.

There are systems for water tank replacement in the market. However, most of them still need to control the water and water inlet of the fish tank through manual or semi-automatic control, or monitor the water level and water quality through manpower; however, the above manual control or manpower The way of monitoring may result in improper control of the water level or water quality of the fish tank due to human error, resulting in the death of the planting standard.

Therefore, how to provide an automatic water exchange system can automatically adjust the water level and water exchange time, greatly improve the stability of water exchange under the timed quantitative and stable temperature control, and thus improve the survival rate of the planting standard, which is an important issue at present. One.

In view of the above problems, the purpose of the present invention is to provide an automatic water exchange system that can automatically adjust the water level and water exchange time and improve the stability of water exchange, thereby improving the survival rate of the planting standard.

In order to achieve the above object, an automatic water changing system according to the present invention comprises a fish tank, a filter tank, at least one sensor, a controller and a human machine interface. The fish tank has a cylinder body, at least one water inlet pipe, at least one water inlet valve, at least one drain pipe and at least one drain valve, and the water inlet pipe and the drain pipe are respectively connected to the cylinder block, and the water inlet valve is correspondingly arranged in the inlet The water pipeline and the drain valve are correspondingly arranged in the drain pipeline. The filter tank has a filter tank, a pump, a first connecting pipe and a second connecting pipe, and the pump connects the first connecting pipe and transports the water in the filter tank through the first connecting pipe To the cylinder, the second connecting line communicates with the cylinder and the water in the cylinder overflows to the filter tank through the second connecting line. The sensor is disposed in the cylinder to sense the water quality in the cylinder. The controller is electrically connected to the inlet valve, the drain valve, the pump and the sensor, and the controller controls the opening and closing of the inlet valve, the drain valve and the pump to control the water level of the cylinder. The human-machine interface is connected to the controller, and the user can input the setting parameters of the controller through the human-machine interface, and automatically adjust the water exchange time and the water exchange amount of the fish tank through the human-machine interface through the controller.

In an embodiment, the controller is a programmable logic controller or a controller including a microprocessor.

In an embodiment, the sensor is a pH sensor or a water temperature sensor.

In one embodiment, the sensor is a water temperature sensor, and the water temperature sensor senses that the water temperature in the cylinder is below a set temperature, and the controller controls the inlet valve to close.

In an embodiment, the automatic water changing system further includes an alarm device electrically connected to the controller, when the setting parameter exceeds a preset value, or the inlet valve, the drain valve, or the pump, or the sensor does not operate When normal, the alarm sends a warning message.

In one embodiment, the alert message is a sound, or an image, or a newsletter, or an instant message, or a combination thereof.

In an embodiment, the filter tank further has a first liquid level switch, the first liquid level switch is disposed in the filter tank, and the first liquid level switch is electrically connected to the controller.

In an embodiment, the controller controls the inlet valve to open when the water level of the filter tank of the filter tank is lower than the water level set height of the first liquid level switch.

In an embodiment, the filter tank further has a second liquid level switch, the second liquid level switch is disposed in the filter tank, and the second liquid level switch is electrically connected to the controller.

In an embodiment, when the water level of the filter tank body is higher than the water level set height of the second liquid level switch, the controller controls the drain valve to open until the second liquid level switch does not operate.

In an embodiment, the filter tank further has a third liquid level switch, and the third liquid level switch is disposed in the filter tank and electrically connected to the controller.

In an embodiment, the water level of the third level switch is set to a height higher than the height of the pump.

In an embodiment, the automatic water changing system further includes a water flow switch disposed in the first connecting line, and the water flow switch is electrically connected to the controller.

In one embodiment, the controller issues a warning signal when the pump is running and the water flow switch is not conducting.

According to the above description, in the automatic water changing system according to the present invention, the inlet valve is correspondingly disposed in the water inlet pipe, the drain valve is correspondingly disposed in the drain pipe, and the pump is connected to the first connecting pipe and the filter tank body is The water is delivered to the cylinder through the first connecting line, and the second connecting line communicates with the cylinder and the water in the cylinder overflows to the filter tank through the second connecting line. In addition, the sensor is disposed in the cylinder to sense the water quality in the cylinder, and the controller controls the opening and closing of the inlet valve, the drain valve and the pump to control the water level of the cylinder. In addition, the user can input the setting parameters of the controller through the human-machine interface, and automatically control the water change time and water exchange amount of the fish tank through the human-machine interface through the controller. Therefore, since the creation automatically senses the water quality in the cylinder through the sensor, and automatically controls the water change time of the fish tank through the human-machine interface and through the controller to control the opening and closing of the inlet valve, the drain valve and the pump. And change the amount of water. Therefore, compared with the prior art, the creation can automatically adjust the water level and the time of water exchange, and greatly improve the stability of water exchange under the timed quantitative and stable temperature control, thereby improving the survival rate of the planting target.

An automatic water changing system in accordance with a preferred embodiment of the present invention will now be described with reference to the accompanying drawings, in which the same elements will be described with the same reference numerals.

Please refer to FIG. 1A and FIG. 1B , wherein FIG. 1A is a schematic diagram of an automatic water changing system 1 according to a preferred embodiment of the present invention, and FIG. 1B is a functional block diagram of the automatic water changing system 1 .

As shown in FIG. 1A, the automatic water changing system 1 includes a fish tank 11, a filter tank 12, a controller 13, at least one sensor 14, and a human machine interface 15. In addition, the automatic water changing system 1 of the embodiment further includes an alarm 16 . First, although the automatic water changing system 1 of the present invention has the "fish tank 11" and can raise fish, it is also possible to use the fish tank 11 to grow water plants without raising fish, or to raise fish or plant water plants in the fish tank 11 at the same time. This creation is not limited.

The fish tank 11 has a cylinder block 111, at least one water inlet pipe 112, at least one water inlet valve 113, at least one drain line 114, and at least one drain valve 115. The water inlet pipe 112 and the drain pipe 114 are respectively connected to the cylinder block 111, and the water inlet valve 113 is correspondingly disposed in the water inlet pipe 112, and the drain valve 115 is correspondingly disposed in the drain pipe 114. As the name suggests, water enters the cylinder 111 from the inlet line 112 and flows from the drain line 114 to the outside of the cylinder 111. Preferably, the water inlet pipe 112 and the drain pipe 114 are connectable to opposite sides or adjacent sides of the cylinder block 111. This embodiment takes the opposite sides as an example. In addition, the position of the drain line 114 connected to the cylinder block 111 is close to the bottom of the cylinder block 111, and the position of the water inlet line 112 connected to the cylinder block 111 is generally higher than the position where the drain line 114 is connected to the cylinder block 111. The best is close to the top end of the cylinder 111. Further, the position at which the water inlet valve 113 is attached to the water inlet pipe 112 or the drain valve 115 to be mounted on the drain pipe 114 is not limited, and may be installed on a pipe close to the cylinder block 111 or a pipe far from the cylinder block 111.

In the present embodiment, the water inlet valve 113 and the drain valve 115 may be, for example but not limited to, solenoid valves. The valve can be opened by energizing the solenoid valve; when the power is off, the valve is automatically closed, thereby controlling the inflow and discharge of water. In addition, in the present embodiment, an inlet valve 113 is installed in a water inlet pipe 112, and the inlet valve 113 is installed on the water inlet pipe 112 close to the cylinder block 111 to take in water and hydration of the cylinder block 111 as an example. In addition, in this embodiment, a drain valve 115 is also mounted on a drain line 114, and the drain valve 115 is mounted on the drain line 114 near the cylinder block 111 to drain the cylinder block 111 as an example. In addition, in different embodiments, one inlet valve 113 can be used to control the inlet water of one inlet pipe 112 or a plurality of inlet pipes 112; similarly, a drain valve 115 can also be used to control a drainage. The drainage of the pipeline 114 or the plurality of drainage pipelines 114; or, the plurality of inlet valves 113 correspondingly controls the plurality of inlet conduits 112, and the plurality of drainage valves 115 correspondingly control the plurality of drainage conduits 114, which are not limited in this creation.

The filter tank 12 has a filter tank body 121, a pump 122, a first connecting line 123 and a second connecting line 124. The pump 122 is disposed in the filter tank housing 121 (preferably at the bottom of the filter tank housing 121), and is connected to the first connecting line 123 to pass the water in the filter tank 121 through the first The connecting line 123 is sent to the cylinder block 111. In addition, the second connecting line 124 communicates with the cylinder 111, and when the water in the cylinder 111 exceeds the nozzle of the second connecting line 124, the water in the cylinder 111 can overflow through the second connecting line 124 to The tank body 121 is filtered to allow water to circulate between the filter tank body 121 and the cylinder block 111 to maintain water flow and water quality (commonly known as water maintenance).

In particular, in the present embodiment, the filter tank body 121 may have at least one water filter material 17, and the water filter material 17 may be, for example, a screen or activated carbon, or other water filter materials, or a combination thereof. Therefore, the water overflowing from the second connecting line 124 into the filter tank body 121 can be filtered by the water filtering material 17 and then pumped to the fish tank 11 by the pump 122 to maintain the cleanliness of the water. Alternatively, in other embodiments, the water filter material 17 may be disposed at the bottom of the filter tank 121, at the top of the filter tank 121, or at the side of the filter tank 121, or The present invention is not limited to being disposed in the cylinder 111, or at the bottom thereof, or at the top thereof, or on the side thereof, as long as the water quality can be filtered through the water filter material 17 to maintain the cleanliness of the water.

As shown in FIG. 1B, the controller 13 is electrically connected to the inlet valve 113, the drain valve 115, the pump 122, and the sensor 14. The controller 13 can control the opening and closing of the inlet valve 113, the drain valve 115 and the pump 122 to change the water of the cylinder 111 and the filter tank 121, thereby automatically regulating the cylinder 111 and the filter tank. 121 water level, water quality and time to change water. The controller 13 can be a Program Logistic Controller (PLC) or a controller including a microprocessor. Therefore, the user can set or change the control parameters on the controller 13.

The sensor 14 is disposed in the cylinder 111 to sense the water quality in the cylinder 111. Wherein, the sensor 14 can be, for example but not limited to, a pH value sensor or a water temperature sensor. If the sensor 14 is a water temperature sensor, the controller 13 can control the inlet valve 113 to close when the water temperature sensor senses that the water temperature in the cylinder 111 is lower than a set temperature. Specifically, when the fish tank 11 is to be changed in water, the controller 13 can issue a control command to the inlet valve 113 and the drain valve 115 according to the user's setting or a preset date and time to control the opening and closing thereof. The purpose of changing the water. The controller 13 can control the drain valve 115 to open for drainage when the user sets the time or the preset set time. When the drain reaches a certain water level (not too low, the fish is prevented from dying), the controller 13 controls the inlet valve. 113 Into the water to the full water level (the water inlet valve 113 can be closed by a liquid level switch control, the figure is not shown, or the water supply time is controlled by the water inlet time to reach the required water level); or, by controlling the drain valve 115 The opening time and the opening time of the inlet valve 113 are used to drain and inject water into the cylinder 111 (the drainage and the inflow cannot be simultaneously performed, and the water is discharged after the drainage is completed) to replace the water in the cylinder 111 to achieve the water quality. With the control of the water level. It is important to note that in order to improve the stability of the water change of the aquarium 11 and thus improve the survival rate of the planting standard, the water in the aquarium 11 cannot be completely replaced, and the user can perform part of the water according to the type and characteristics of the fish or the water grass. Replacement.

In addition, since the water temperature is lowered by the water inflow or the hydration when the water inlet valve 113 is opened or replenished during the water exchange process, the fish or the water grass is killed. Therefore, when the controller 13 senses that the water temperature in the cylinder 111 is lower than the set temperature according to the sensor 14 (the set temperature can be set by the user according to the type of the raised fish or the planted water), the controller 13 can control the control. The water valve 113 is closed, and after the water temperature (which can be combined with the water of a heater heating cylinder 111, not shown) rises to an upper temperature limit, the controller 13 controls the inlet valve 113 to continue to enter the water, in addition to achieving automatic water change. In addition to the purpose, it can also prevent fish or water plants from dying due to low water temperature.

The human interface 15 is connected to the controller 13. The human interface 15 is, for example but not limited to, a touch panel. The user can input or modify the setting parameters of the controller 13 through the human interface 15, and the operation information of the entire automatic water changing system 1 can be obtained through the human interface 15. Specifically, in order to facilitate the user to manipulate and change the settings, the user can input or modify the setting parameters (such as the time and date of the appointment water change) through the human machine interface 15, and automatically adjust the fish tank through the human machine interface 15 through the controller 13. 11 and the water level and water quality of the filter tank 12, and automatically adjust the water exchange time and water exchange amount of the fish tank 11. In addition, the human-machine interface 15 can also record and display the component status of the entire system, such as the opening and closing of the valve, the pump 122, the opening and closing time, the water level, the water temperature, the PH value, etc., and can be displayed. For example, water intake time, water intake, warning records, water temperature, water level, etc. In addition, in addition to automatically monitoring the water level, the water quality, the water exchange time and the water exchange amount, in other embodiments, the user can also issue a control command to the controller 13 through the human machine interface 15 according to the demand, in a manual or semi-automatic manner. The opening and closing of the water inlet valve 113, the drain valve 115 and the pump 122 are controlled to regulate the water level and water quality of the fish tank 11 and the filter tank 12, as well as the water exchange time and the water exchange amount, and the creation is not limited. Therefore, in some embodiments, the controller 13 and/or the human interface 15 can record the start time, the end time, the type of alarm, the time of occurrence, and the like of the water change, thereby achieving the purpose of multifunctional automatic water change. .

In addition, the alarm 16 is electrically connected to the controller 13, and when the set parameter of the controller 13 exceeds a preset value, or the water inlet valve 113, or the drain valve 115, or the pump 122, or the sensor 14 does not operate normally. The alarm 16 can issue a warning message. The warning message may be a sound, or an image, or a newsletter, or an instant message, or a combination thereof. Alert messages can be sent to mobile devices to alert users. In addition, in addition to the warning function, the controller 13 can also record the content of the warning message, and the user can also query the alarm content through the human machine interface 15 in the subsequent manner.

In addition, in order to monitor whether the operation of the pump 122 is normal, the automatic water changing system 1 of the embodiment further includes a water flow switch 18, the water flow switch 18 is disposed in the first connecting line 123, and the water flow switch 18 and the controller 13 are electrically connection. When the pump 122 is operated to transfer the water in the filter tank body 121 to the cylinder block 111 through the first connecting line 123, the water flow switch 18 should be turned on; however, if the pump 122 is operated and the water flow switch 18 is not turned on, It indicates that the water flow does not flow from the first connecting line 123 to the cylinder block 111, and also indicates that the operation of the pump 122 is abnormal. Therefore, the controller 13 can send a warning signal to the alarm device 16 to send a warning message through the alarm device 16. In this way, the user is notified that the operation of the pump 122 is abnormal.

In conclusion, when the automatic water changing system 1 of the present invention reaches the date and time of the preset water change, the controller 13 may first control the drain valve 115 to open for drainage, and after draining to a certain water level or a certain time, the controller 13 The inlet valve 113 is controlled to enter the full water level or reach the set time. During the water exchange process, if the water temperature sensor (sensor 14) senses that the water temperature in the cylinder 111 is lower than the set temperature, the controller 13 controls the inlet valve 113 to close, and the water temperature rises to the upper temperature limit. After that, the controller 13 controls the water inlet valve 113 to continue to enter the water. In addition to automatically controlling the water level and water quality of the fish tank 111 to achieve automatic water exchange, the fish tank 11 can be automatically regulated by the human machine interface 15 through the controller 13. The water exchange time and water exchange capacity greatly improve the stability of water exchange under regular quantitative control and stable temperature control, so as to prevent fish or water plants from dying due to low water temperature or excessive water level fluctuation.

After the water exchange of the aquarium 11 is completed, the automatic water exchange system 1 can enter a monitoring mode to monitor various components and devices electrically connected to the controller 13, and simultaneously monitor the water temperature or pH value of the cylinder 111 through the sensor 14. Or simultaneously monitor the water temperature and pH value of the cylinder 111 through the water temperature sensor and the pH sensor. In addition, when an abnormality occurs in the component or the device or an abnormality occurs in the water exchange process (for example, the water inlet valve 113, or the drain valve 115, or the pump 122 is not turned on when it is turned on, or is not turned off when the water is turned off, or the sensor 14 is When the pump 122 is faulty, an alarm can be issued through the alarm 16 to alert the user.

In addition, in the embodiment, the filter tank 12 further has a first liquid level switch 127, the first liquid level switch 127 is disposed in the filter tank housing 121, and the first liquid level switch 127 is electrically connected to the controller 13. . When the water level in the filter tank body 121 is lower than the first set water level of one of the first liquid level switches 127 (ie, the water level setting height of the first liquid level switch 127) due to evaporation or other factors (eg, water leakage), the controller 13 The inlet valve 113 can be controlled to be opened to replenish water through the water inlet pipe 112. After the water fills up and the first liquid level switch 127 is actuated, the controller 13 can control the water inlet valve 113 to close and stop the hydration.

In addition, the filter tank 12 further has a second liquid level switch 127a. The second liquid level switch 127a is disposed in the filter tank housing 121, and the second liquid level switch 127a is electrically connected to the controller 13. The water level setting height of the second liquid level switch 127a in the filter tank housing 121 is higher than the water level setting height of the first liquid level switch 127. Therefore, when the water level in the filter tank 121 is higher than the second set water level of the second level switch 127a for some reason (for example, the first level switch 127 or the inlet valve 113 is faulty) (ie, the second liquid) When the water level of the position switch 127a is set to the height, the controller 13 controls the drain valve 115 to open until the second liquid level switch 127a does not operate to perform forced drainage through the drain line 114 to cause the cylinder block 111 and the filter tank case 121. The water does not overflow because it is too full. The first liquid level switch 127 or the second liquid level switch 127a may be, for example, a float type liquid level switch, or an electrode type liquid level switch, or a transmissive liquid level switch, or a reflective liquid level switch, or a magnetic type. Level switch, or ultrasonic level switch, or optical level switch. Here, the floating level liquid level switch of the first liquid level switch 127 and the second liquid level switch 127a is taken as an example.

2A and FIG. 2B, FIG. 2A is a schematic diagram of an automatic water changing system 1a according to another embodiment, and FIG. 2B is a functional block diagram of the automatic water changing system 1a.

The main difference from the automatic water changing system 1 is that the filter tank 12 of the automatic water changing system 1a of the present embodiment further has a third liquid level switch 127b, and the third liquid level switch 127b is disposed in the filter tank housing 121, and The controller 13 is electrically connected. The third liquid level switch 127b of this embodiment is also exemplified by a float type liquid level switch, and its water level setting height is higher than the height of the pump 122. Therefore, the water level setting height of the second liquid level switch 127a in the filter tank housing 121 is higher than the water level setting height of the first liquid level switch 127 in the filter tank housing 121, and the first liquid level switch 127 is The water level setting height of the filter tank body 121 is higher than the water level setting height of the third liquid level switch 127b in the filter tank housing 121. Therefore, when the water level of the filter tank body 121 is higher than the set water level of the third liquid level switch 127b, the controller 13 can control the pump 122 to start to drown the water to the fish tank 11 to make the water in the filter tank 12 and the fish tank 11 Flow between, avoiding the damage of pump 122 without water idling.

In addition, the technical features of other components of the automatic water changing system 1a can refer to the same components of the automatic water changing system 1, and will not be described again.

In summary, in the automatic water changing system according to the present invention, the inlet valve is correspondingly disposed in the water inlet pipe, the drain valve is correspondingly disposed in the drain pipe, and the pump is connected to the first connecting pipe and the filter tank body is The water is delivered to the cylinder through the first connecting line, and the second connecting line communicates with the cylinder and the water in the cylinder overflows to the filter tank through the second connecting line. In addition, the sensor is disposed in the cylinder to sense the water quality in the cylinder, and the controller controls the opening and closing of the inlet valve, the drain valve and the pump to control the water level of the cylinder. In addition, the user can input the setting parameters of the controller through the human-machine interface, and automatically control the water change time and water exchange amount of the fish tank through the human-machine interface through the controller. Therefore, since the creation automatically senses the water quality in the cylinder through the sensor, and automatically controls the water change time of the fish tank through the human-machine interface and through the controller to control the opening and closing of the inlet valve, the drain valve and the pump. And change the amount of water. Therefore, compared with the prior art, the creation can automatically adjust the water level and the time of water exchange, and greatly improve the stability of water exchange under the timed quantitative and stable temperature control, thereby improving the survival rate of the planting target.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of this creation shall be included in the scope of the appended patent application.

1, 1a‧‧‧Automatic water exchange system
11‧‧‧fish tank
111‧‧‧Cylinder block
112‧‧‧Inlet pipe
113‧‧‧Inlet valve
114‧‧‧Drainage line
115‧‧‧Drain valve
12‧‧‧Filter tank
121‧‧‧Filter tank body
122‧‧‧ pump
123‧‧‧First connecting line
124‧‧‧Second connection line
127‧‧‧First level switch
127a‧‧‧Second level switch
127b‧‧‧ third level switch
13‧‧‧ Controller
14‧‧‧Sensor
15‧‧‧Human Machine Interface
16‧‧‧Alarm
17‧‧‧Water filtration materials
18‧‧‧Water flow switch

FIG. 1A is a schematic diagram of an automatic water changing system according to a preferred embodiment of the present invention. FIG. 1B is a functional block diagram of the automatic water changing system of the preferred embodiment of the present invention. 2A is a schematic diagram of an automatic water changing system according to another embodiment of the preferred embodiment of the present invention. 2B is a functional block diagram of an automatic water changing system according to another embodiment of the present invention.

1‧‧‧Automatic water exchange system

11‧‧‧fish tank

111‧‧‧Cylinder block

112‧‧‧Inlet pipe

113‧‧‧Inlet valve

114‧‧‧Drainage line

115‧‧‧Drain valve

12‧‧‧Filter tank

121‧‧‧Filter tank body

122‧‧‧ pump

123‧‧‧First connecting line

124‧‧‧Second connection line

127‧‧‧First level switch

127a‧‧‧Second level switch

14‧‧‧Sensor

17‧‧‧Water filtration materials

18‧‧‧Water flow switch

Claims (14)

An automatic water changing system comprising: a fish tank having a cylinder body, at least one water inlet pipe, at least one water inlet valve, at least one drain pipe and at least one drain valve, wherein the water inlet pipe and the drain pipe are respectively connected to the water drain pipe The water inlet valve is correspondingly disposed in the water inlet pipe, and the drain valve is correspondingly disposed on the drain pipe; a filter tank having a filter tank body, a pump, a first connecting pipe and a second connecting line, the pump connecting the first connecting line and transporting water in the filter tank body to the cylinder through the first connecting line, the second connecting line connecting the cylinder and The water in the cylinder overflows to the filter tank through the second connecting pipe; at least one sensor is disposed in the cylinder to sense water quality in the cylinder; a controller, and the water inlet a valve, the drain valve, the pump and the sensor are electrically connected, the controller controls the inlet valve, the drain valve and the opening and closing of the pump to control the water level of the cylinder; and a man-machine Interface, connected to the controller, through which the user can interface The setting parameters of the controller, and the man-machine interface by automatic control of the time of changing the water tank through the controller and the exchange of water. The automatic water changing system of claim 1, wherein the controller is a programmable logic controller or a controller including a microprocessor. The automatic water changing system of claim 1, wherein the sensor is a pH sensor or a water temperature sensor. The automatic water changing system of claim 1, wherein the sensor is a water temperature sensor, and the water temperature sensor senses that the water temperature in the cylinder is lower than a set temperature, the control The controller controls the inlet valve to close. The automatic water changing system of claim 1, further comprising: an alarm electrically connected to the controller, when the setting parameter exceeds a preset value, or the inlet valve, or the drain valve, or The alarm sends a warning message when the pump or the sensor is not working properly. The automatic water changing system of claim 5, wherein the warning message is sound, or image, or newsletter, or instant messaging, or a combination thereof. The automatic water changing system of claim 1, wherein the filter tank further has a first liquid level switch, the first liquid level switch is disposed in the filter tank, and the first liquid level switch is The controller is electrically connected. The automatic water changing system of claim 7, wherein the controller controls the water inlet valve to open when the water level of the filter tank body of the filter tank is lower than a water level setting height of the first liquid level switch. . The automatic water changing system of claim 1, wherein the filter tank further has a second liquid level switch, the second liquid level switch is disposed in the filter tank, and the second liquid level switch is The controller is electrically connected. The automatic water changing system of claim 9, wherein the controller controls the drain valve to open to the second liquid when the water level of the filter tank body is higher than the water level setting height of the second liquid level switch The bit switch does not work. The automatic water changing system of claim 1, wherein the filter tank further has a third liquid level switch, wherein the third liquid level switch is disposed in the filter tank and electrically connected to the controller. The automatic water changing system of claim 11, wherein the water level setting height of the third liquid level switch is higher than the height of the pump. The automatic water exchange system of claim 1, further comprising: a water flow switch disposed in the first connecting line, and the water flow switch is electrically connected to the controller. The automatic water changing system of claim 13, wherein the controller sends a warning signal when the pump is running and the water flow switch is not conducting.