阅读说明：本技术 水过滤装置、水冷却系统和水冷却方法 (Water filtering device, water cooling system and water cooling method ) 是由 韩云龙 陈平 薛廷强 于 2019-04-23 设计创作，主要内容包括：本发明实施例中提出的一种水过滤装置、水冷却系统和水冷却方法。其中,水过滤装置包括：壳体,其上设置有第一进水口、出水口和第一排污口；滤网,其设置在所述壳体内部,且与所述壳体之间具有设定间隙,并具有与所述第一进水口连通的第二进水口以及与所述第一排污口连通的第二排污口；水流导向阀,其设置在第二进水口,能够对所述第二进水口进行开启或关闭；和水流排污阀,其设置在第二排污口和第一排污口,能够同时对所述第二排污口和第一排污口进行开启或关闭。本发明实施例中的技术方案适用于滤网的自动清洗。(The embodiment of the invention provides a water filtering device, a water cooling system and a water cooling method. Wherein, water filter equipment includes: the shell is provided with a first water inlet, a water outlet and a first sewage draining port; the filter screen is arranged in the shell, has a set gap with the shell, and is provided with a second water inlet communicated with the first water inlet and a second sewage draining outlet communicated with the first sewage draining outlet; the water flow guide valve is arranged at the second water inlet and can open or close the second water inlet; and the water flow drain valve is arranged at the second drain outlet and the first drain outlet and can be opened or closed simultaneously. The technical scheme in the embodiment of the invention is suitable for automatically cleaning the filter screen.)

1. A water filtering device (1), characterized by comprising:

the device comprises a shell (10) which is provided with a first water inlet (11), a water outlet (12) and a first sewage draining port (13);

a filter screen (20) which is arranged inside the shell (10), has a set gap (50) with the shell (10), and is provided with a second water inlet (21) communicated with the first water inlet (11) and a second sewage draining outlet (22) communicated with the first sewage draining outlet (13);

a water flow guide valve (30) which is arranged at the second water inlet (21) and can open or close the second water inlet (21); and

the water flow blowdown valve (40) is arranged at the second blowdown port (22) and the first blowdown port (13) and can be used for opening or closing the second blowdown port (22) and the first blowdown port (13) simultaneously;

when the water flow guide valve (30) is opened, the water flow blowdown valve (40) is closed, and at the moment, water flow can enter the filter screen (20) through the first water inlet (11) and the second water inlet (21), flows through the set gap (50) after being filtered by the filter screen (20), and then flows out through the water outlet (12); when the water flow guide valve (30) is closed, the water flow blowdown valve (40) is opened, at the moment, water flow can enter the set gap (50) through the first water inlet (11), then reversely enters the filter screen (20) from the set gap (50), and then flows out from the second sewage outlet (22) and the first sewage outlet (13).

2. A water filtering device according to claim 1, wherein the housing (10) is a barrel housing and the sieve (20) is a barrel sieve, both coaxially arranged.

3. A water cooling system, comprising:

a water filtering device (1) according to claim 1 or 2;

a first solenoid valve (2) for controlling the opening and closing of the water flow guide valve (30);

the second electromagnetic valve (3) is used for controlling the opening and closing of the water flow blowdown valve (40); and

the control module (4) is used for controlling the first electromagnetic valve (2) and the second electromagnetic valve (3) according to the cleaning times, the single cleaning time and the cleaning intervals of each round of cleaning in a first set logic when the filter screen is determined to be required to be cleaned; the method specifically comprises the following steps: in each cleaning within the cleaning times, according to the length of time of a single cleaning, controlling the first electromagnetic valve (2) to close the water flow guide valve (30), and simultaneously controlling the second electromagnetic valve (3) to open the water flow blowdown valve (40); and controlling the first electromagnetic valve (2) to open the water flow guide valve (30) and simultaneously controlling the second electromagnetic valve (3) to close the water flow blowdown valve (40) at each cleaning interval before the cleaning times are finished.

4. The water cooling system in accordance with claim 3, further comprising:

a primary cooling water replenishing port (6a) for replenishing primary cooling water;

a secondary cooling water replenishing port (6b) for replenishing secondary cooling water;

a water replenishing pipe (7) for communicating the primary cooling water replenishing port (6a) and the secondary cooling water replenishing port (6 b);

the water replenishing valve (8) is arranged in the water replenishing water pipe (7) and is used for controlling the connection and disconnection of the water replenishing water pipe (7); and

the third electromagnetic valve (9) is used for controlling the opening and closing of the water replenishing valve (8);

the control module (4) is further used for controlling the third electromagnetic valve (9) according to the water supplementing times, the single water supplementing time and the water supplementing interval of each round of water supplementing in a second set logic when the secondary cooling water is determined to be required to be supplemented; the method specifically comprises the following steps: in each water replenishing within the water replenishing times, controlling the third electromagnetic valve (9) to open the water replenishing valve (8) according to the length of time of each water replenishing; and controlling the third electromagnetic valve (9) to close the water replenishing valve (8) at each water replenishing interval before the water replenishing times are finished.

5. The water cooling system in accordance with claim 3 or 4,

the control module (4) determines that the filter screen is required to be cleaned when each cleaning period comes according to the set cleaning period, and determines that the secondary cooling water is required to be replenished when each replenishing period comes according to the set replenishing period.

6. The water cooling system in accordance with claim 4, further comprising:

a pressure sensor (PI) for detecting a water pressure of secondary cooling water of the water cooling system;

and the control module (4) determines that the secondary cooling water needs to be supplemented when the water pressure detected by the pressure sensor is lower than a set water pressure threshold value, and determines that the water supplementation is finished after the water pressure detected by the pressure sensor (PI) is restored to a set normal pressure.

7. The water cooling system in accordance with any one of claims 3, 4 and 6, further comprising:

a flow sensor (FLI) for detecting a flow rate of secondary cooling water of the water cooling system;

the control module (4) determines that the filter screen needs to be cleaned when the water flow detected by the flow sensor (FLI) is lower than a set flow threshold, and determines that the cleaning is finished after the water flow detected by the flow sensor (FLI) is restored to a set normal flow.

8. The water cooling system in accordance with claim 7, wherein said water cooling system is used for cooling heat generating components in a magnetic resonance imaging system.

9. The water cooling system in accordance with claim 8, characterized in that the control module (4) is switched on when the magnetic resonance system is not scanning at night.

10. A water cooling method applied to a water cooling system, characterized in that the water cooling system comprises the water filtering device according to claim 1 or 2; the water cooling method comprises the following steps:

when the filter screen is judged to be cleaned, according to the cleaning times, the single cleaning time and the cleaning interval of each preset cleaning, aiming at each cleaning, according to the single cleaning time, controlling the water flow guide valve to be closed, and simultaneously controlling the water flow blowdown valve to be opened; at each washing interval before the completion of the number of times of washing, the water flow guide valve is controlled to be opened while the water flow sew-down valve is controlled to be closed (S32).

11. The water cooling method applied to a water cooling system as recited in claim 10, wherein the water cooling system further comprises: the water replenishing device comprises a primary cooling water replenishing port, a secondary cooling water replenishing port, a water replenishing water pipe for communicating the primary cooling water replenishing port with the secondary cooling water replenishing port and a water replenishing valve arranged in the water replenishing water pipe; the water cooling method further includes: when the secondary cooling water needs to be supplemented, controlling the water supplementing valve to be opened according to the water supplementing times, the single water supplementing time and the water supplementing interval included in each preset water supplementing cycle and the single water supplementing time within each water supplementing time; controlling the water replenishing valve to be closed at each water replenishing interval before the completion of the number of times of water replenishing (S34).

12. The water cooling method applied to a water cooling system according to claim 11, further comprising: monitoring a water pressure and a water flow rate of secondary cooling water of the water cooling system (S30);

when the water pressure is monitored to be lower than a set water pressure threshold value, determining that water supplement needs to be carried out on secondary cooling water, and after the water pressure is restored to a set normal pressure, determining that water supplement is finished;

when the water flow is monitored to be lower than a set flow threshold value, the fact that the filter screen needs to be cleaned is determined, and after the water flow is recovered to be the set normal flow, the fact that cleaning is finished is determined.

13. The water cooling method applied to a water cooling system as recited in claim 12, wherein the water cooling system is used for cooling heat generating components in a magnetic resonance imaging system;

the water pressure and the water flow of the secondary cooling water of the monitoring water cooling system are as follows: and when the magnetic resonance system does not scan at night, monitoring the water pressure and the water flow of secondary cooling water of the water cooling system.

Technical Field

The invention relates to the field of cooling systems, in particular to a water filtering device, a water cooling system and a water cooling method.

Background

Magnetic Resonance Imaging (MRI) systems operate because various system components generate heat to varying degrees, and therefore cooling systems, such as water cooling systems, are often provided to remove excess heat to ensure that the various components operate within normal temperature ranges. Because most MRI systems are superconducting magnets, when the MRI system is turned off, in order to ensure that the superconducting magnet operates at a normal temperature, the liquid helium compressor 7 × 24H needs to operate continuously, and accordingly, the water cooling system also needs to take away heat generated by the liquid helium compressor to ensure that the liquid helium compressor operates normally.

In the working process of the water cooling system, along with the continuous circulating flow of cooling water, dirt is generated in a water pipe loop and gradually accumulated in the filter screen, so that the water flow is too low, the refrigeration effect is low, and the severe conductive refrigeration system stops. The shutdown of the cooling system can cause the abnormal shutdown of the MRI system and also cause the shutdown of the liquid helium compressor, thereby causing the volatilization and leakage of the liquid helium of the superconducting magnet.

For this reason, service engineers are required to be sent to the site periodically to clean the filter screen in the water channel, and during the cleaning of the filter screen in the water channel, the water cooling system must be shut down, so that the MRI system also needs to be shut down to stop working normally.

Disclosure of Invention

In view of the above, the embodiments of the present invention provide a water filtering apparatus for a water cooling system, and provide a water cooling system and a water cooling method for automatically cleaning a filter screen, thereby reducing the need for dispatching a service engineer to clean the filter screen on site.

The water filtering device provided in the embodiment of the invention comprises: the shell is provided with a first water inlet, a water outlet and a first sewage draining port; the filter screen is arranged in the shell, has a set gap with the shell, and is provided with a second water inlet communicated with the first water inlet and a second sewage draining outlet communicated with the first sewage draining outlet; the water flow guide valve is arranged at the second water inlet and can open or close the second water inlet; the water flow blowdown valve is arranged at the second blowdown port and the first blowdown port and can be used for opening or closing the second blowdown port and the first blowdown port simultaneously; when the water flow guide valve is opened, the water flow blowdown valve is closed, and at the moment, water flow can enter the filter screen through the first water inlet and the second water inlet, flows through the set gap after being filtered by the filter screen and then flows out through the water outlet; when the water flow guide valve is closed, the water flow blowdown valve is opened, water flow can enter the set gap through the first water inlet at the moment, then reversely enters the filter screen from the set gap, and then flows out of the second blowdown port and the first blowdown port.

In one embodiment, the housing is a barrel housing and the screen is a barrel screen, both coaxially disposed.

The water cooling system provided in the embodiment of the invention comprises: the water filtration device of any of the above embodiments; the first electromagnetic valve is used for controlling the opening and closing of the water flow guide valve; the second electromagnetic valve is used for controlling the opening and closing of the water flow blowdown valve; the control module is used for controlling the first electromagnetic valve and the second electromagnetic valve according to the cleaning times, the single cleaning time and the cleaning intervals of each round of cleaning in the first set logic when the filter screen is determined to be cleaned; the method specifically comprises the following steps: in each cleaning within the cleaning times, according to the length of a single cleaning time, controlling the first electromagnetic valve to close the water flow guide valve, and simultaneously controlling the second electromagnetic valve to open the water flow blowdown valve; and controlling the first electromagnetic valve to open the water flow guide valve and simultaneously controlling the second electromagnetic valve to close the water flow blowdown valve at each cleaning interval before the cleaning times are finished.

In one embodiment, further comprising: the primary cooling water replenishing port is used for replenishing primary cooling water; the secondary cooling water replenishing port is used for replenishing secondary cooling water; the water replenishing water pipe is communicated with the primary cooling water replenishing port and the secondary cooling water replenishing port; the water replenishing valve is arranged in the water replenishing water pipe and used for controlling the connection and disconnection of the water replenishing water pipe; the third electromagnetic valve is used for controlling the opening and closing of the water replenishing valve; the control module is further used for controlling the third electromagnetic valve according to the water supplementing times, the single water supplementing time and the water supplementing interval included in each water supplementing round in a second set logic when the secondary cooling water is determined to be required to be supplemented; the method specifically comprises the following steps: controlling the third electromagnetic valve to open the water replenishing valve according to the time length of single water replenishing during each water replenishing within the water replenishing times; and controlling the third electromagnetic valve to close the water replenishing valve at each water replenishing interval before the water replenishing times are finished.

In one embodiment, the control module determines that the filter screen needs to be cleaned when each cleaning cycle arrives according to a set cleaning cycle, and determines that the secondary cooling water needs to be replenished when each replenishing cycle arrives according to a set replenishing cycle.

In one embodiment, further comprising: the pressure sensor is used for detecting the water pressure of secondary cooling water of the water cooling system; and the control module determines that secondary cooling water needs to be supplemented when the water pressure detected by the pressure sensor is lower than a set water pressure threshold value, and determines that water supplementation is finished after the water pressure detected by the pressure sensor is restored to a set normal pressure.

In one embodiment, further comprising: the flow sensor is used for detecting the flow rate of secondary cooling water of the water cooling system; and the control module determines that the filter screen needs to be cleaned when the water flow detected by the flow sensor is lower than a set flow threshold value, and determines that the cleaning is finished after the water flow detected by the flow sensor is recovered to the set normal flow.

In one embodiment, the water cooling system is used for cooling heat generating components in a magnetic resonance imaging system.

In one embodiment, the control module is turned on when the magnetic resonance system is not scanning at night.

The water cooling method applied to the water cooling system provided by the embodiment of the invention comprises the water filtering device; the water cooling method comprises the following steps: when the filter screen is judged to be cleaned, according to the cleaning times, the single cleaning time and the cleaning interval of each preset cleaning, aiming at each cleaning, according to the single cleaning time, controlling the water flow guide valve to be closed, and simultaneously controlling the water flow blowdown valve to be opened; and controlling the water flow guide valve to be opened and controlling the water flow blowdown valve to be closed at each cleaning interval before the cleaning times are finished.

In one embodiment, the water cooling system further comprises: the water replenishing device comprises a primary cooling water replenishing port, a secondary cooling water replenishing port, a water replenishing water pipe for communicating the primary cooling water replenishing port with the secondary cooling water replenishing port and a water replenishing valve arranged in the water replenishing water pipe; the water cooling method further includes: when the secondary cooling water needs to be supplemented, controlling the water supplementing valve to be opened according to the water supplementing times, the single water supplementing time and the water supplementing interval included in each preset water supplementing cycle and the single water supplementing time within each water supplementing time; and controlling the water replenishing valve to close at each water replenishing interval before the water replenishing times are completed.

In one embodiment, further comprising: monitoring the water pressure and the water flow of secondary cooling water of the water cooling system; when the water pressure is monitored to be lower than a set water pressure threshold value, determining that water supplement needs to be carried out on secondary cooling water, and after the water pressure is restored to a set normal pressure, determining that water supplement is finished; when the water flow is monitored to be lower than a set flow threshold value, the fact that the filter screen needs to be cleaned is determined, and after the water flow is recovered to be the set normal flow, the fact that cleaning is finished is determined.

In one embodiment, the water cooling system is used for cooling heat generating components in a magnetic resonance imaging system; the water pressure and the water flow of the secondary cooling water of the monitoring water cooling system are as follows: and when the magnetic resonance system does not scan at night, monitoring the water pressure and the water flow of secondary cooling water of the water cooling system.

According to the scheme, the gap is formed between the shell and the filter screen, the water inlet of the filter screen is provided with the water flow guide valve capable of closing and opening the water inlet of the filter screen, and the filter screen and the shell are provided with the water flow blow-down valve, so that when the water flow guide valve is opened and the water flow blow-down valve is closed, water flows enter the main circulation loop through the water outlet of the shell after being filtered by the filter screen to perform normal water cooling work; and when rivers guide valve closed rivers blowoff valve was opened, rivers can be through the space refluence between casing and the filter screen and advance the filter screen, and the rivers that wash behind the filter screen can be discharged through the blowoff valve fast, and is visible, through opening and closing of control rivers guide valve and rivers blowoff valve, can realize the automatic palirrhea washing to the filter screen.

Furthermore, a water replenishing pipe for communicating the primary cooling water replenishing port and the secondary cooling water replenishing port is arranged between the primary cooling water replenishing port and the secondary cooling water replenishing port, and a water replenishing valve for controlling the communication and the shutoff of the water replenishing pipe is arranged in the water replenishing pipe, so that the automatic water replenishing of the primary cooling water to the secondary cooling water can be controlled by controlling the opening and the closing of the water replenishing valve.

In addition, the water pressure of the secondary cooling water is detected by arranging a pressure sensor, and water supplement is triggered when the water pressure is lower than a set water pressure threshold value; the water flow of the secondary cooling water is detected by arranging the flow sensor, and the filter screen is triggered to be cleaned when the water flow is lower than a set flow threshold value. Or, by setting periodic water supplement and filter screen cleaning, automatic water supplement and filter screen cleaning can be realized, so that the water cooling system is basically maintenance-free, the time and cost of field service of a service engineer are saved, and the system shutdown caused by conventional maintenance of water supplement and filter screen cleaning is reduced.

Aiming at the magnetic resonance system, the system breakdown caused by too low water pressure or water path blockage can be avoided, so that the temperature rise of the magnet and the leakage of liquid helium can be avoided.

Drawings

The foregoing and other features and advantages of the invention will become more apparent to those skilled in the art to which the invention relates upon consideration of the following detailed description of a preferred embodiment of the invention with reference to the accompanying drawings, in which:

fig. 1A and 1B are exemplary structural diagrams of a water filtering device for a water cooling system according to an embodiment of the present invention. Wherein, fig. 1A is a state when the water flow circularly works, and fig. 1B is a state when the water flow washes the filter screen.

Fig. 2 is a schematic diagram of an exemplary structure of a water cooling system according to an embodiment of the present invention.

Fig. 3 is an exemplary flow chart of a water cooling method applied to a water cooling system according to an embodiment of the present invention.

Wherein the reference numbers are as follows:

Detailed Description

In the embodiment of the invention, in order to reduce the requirement of dispatching a service engineer to clean the filter screen on site, the water cooling system can automatically clean the filter screen, and therefore, the structure of the filter device needs to be improved to adapt to automatic cleaning. After creative labor, a gap is arranged between a shell and a filter screen, a water flow guide valve capable of closing and opening a water inlet of the filter screen is arranged at a water inlet of the filter screen, and when the water flow guide valve opens the water inlet of the filter screen, water flows enter a main circulation loop through a water outlet on the shell after being filtered by the filter screen to perform normal water cooling work; and when rivers guide valve closed the filter screen water inlet, rivers can be through the space refluence between casing and the filter screen into the filter screen to wash the filter screen, further set up a blowoff valve on filter screen and casing this moment, make the rivers after washing the filter screen can discharge through the blowoff valve fast.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.

Fig. 1A and 1B are exemplary structural diagrams of a water filtering device 1 for a water cooling system in an embodiment of the present invention. Fig. 1A shows a state of water circulation operation when the water flow guide valve is opened and the water flow blowoff valve is closed, and fig. 1B shows a state when the water flow guide valve is closed and the water flow blowoff valve is opened to wash the filter screen. As shown in fig. 1A and 1B, the water filter device 1 includes: a housing 10, a screen 20, a water flow guide valve 30 and a water flow drain valve 40.

Wherein, the shell 10 is provided with a first water inlet 11, a water outlet 12 and a first sewage draining outlet 13.

The filter net 20 is disposed inside the casing 10 with a predetermined gap 50 therebetween, and has a second water inlet 21 communicating with the first water inlet 11 and a second drain 22 communicating with the first drain 13.

The water flow guide valve 30 is provided at the second water inlet 21, and can open or close the second water inlet 21.

The water flow blowdown valve 40 is disposed at the second blowdown port 22 and the first blowdown port 13, and can open or close the second blowdown port 22 and the first blowdown port 13 at the same time.

When the water flow guide valve 30 is opened, the water flow blowdown valve 40 is closed, at this time, water flow can enter the filter screen 20 through the first water inlet 11 and the second water inlet 21 as shown by hollow arrows in fig. 1A, and flows through the set gap 50 after being filtered by the filter screen 20, and then flows out through the water outlet 12, at this time, the water flow is in a normal circulating working state; when the water flow guide valve 30 is closed, the water flow blowdown valve 40 is opened, at this time, water flow can enter the set gap 50 through the first water inlet 12 as shown by a hollow arrow in fig. 1B, then reversely enter the filter screen 20 from the set gap 50, and then flow out from the second sewage discharge port 22 and the first sewage discharge port 13, at this time, the water flow is in a state of backwashing the filter screen.

In one embodiment, the housing 10 may be a barrel housing and the screen 20 may be a barrel screen, and both may be coaxially disposed.

Fig. 2 shows an exemplary structural schematic diagram of a water cooling system in an embodiment of the present invention. As shown in fig. 2, the water cooling system includes: the water filtering device 1 shown in fig. 1A and 1B, a first electromagnetic valve 2, a second electromagnetic valve 3 and a control module 4. Furthermore, the water cooling system may also comprise other related components, such as a heat exchanger 5, a water pump M, an inverter FC, a primary water refill 6a, a secondary water refill 6b, etc. In different embodiments, a water replenishing pipe 7, a water replenishing valve 8, a third electromagnetic valve 9, a pressure sensor PI, a flow sensor FLI, an outdoor water cooler CL, a temperature sensor TI, and the like may be further included.

Wherein the first solenoid valve 2 is used to control the opening and closing of the water flow guide valve 30.

The second solenoid valve 3 is used for controlling the opening and closing of the water flow blowdown valve 40.

The control module 4 is used for controlling the first electromagnetic valve 2 and the second electromagnetic valve 3 according to the cleaning times, the single cleaning time and the cleaning intervals included in each round of cleaning in the first set logic when the filter screen is determined to be required to be cleaned; the method specifically comprises the following steps: in each cleaning within the cleaning times, according to the length of a single cleaning time, controlling the first electromagnetic valve 2 to close the water flow guide valve 30, and simultaneously controlling the second electromagnetic valve 3 to open the water flow blowdown valve 40; at each washing interval before the completion of the number of times of washing, the first solenoid valve 2 is controlled to open the water flow guide valve 30, and the second solenoid valve 3 is controlled to close the water flow drain valve 40. For example, in one embodiment, a round of washing includes 3 washes, each lasting 5 seconds with 10 seconds intervals.

Considering that a small amount of water leaks during the operation of the cooling system, the water pressure of the water pipe loop is too low in the past, and the cooling system can be seriously stopped. Therefore, conventionally, a primary cooling water replenishment port 6a for replenishing the primary cooling water is provided on the primary cooling water (also referred to as primary water) side of the heat exchanger, and a secondary cooling water replenishment port 6b for replenishing the secondary cooling water is provided on the secondary cooling water (also referred to as secondary water) side of the heat exchanger. The water supplement aiming at the primary cooling water currently comprises two conditions of passive water supplement and active water supplement, wherein the primary cooling water for passive water supplement is provided by a central cold water system of a hospital, and the primary cooling water for active water supplement is provided by an outdoor water cooler CL. The primary cooling water replenishment for both cases has now achieved automatic replenishment. However, the existing solution for supplementing the secondary cooling water still needs to periodically send a service engineer to the site to supplement water by using a water pump and the like to ensure that the water pressure is normal, and during the supplementing of the secondary cooling water, the water cooling system also needs to be shut down, so that the MRI system also needs to be shut down to stop normal operation.

In the embodiment of the invention, in order to further reduce the requirement of dispatching service engineers to carry out secondary cooling water replenishing on site, a replenishing water pipe 7 for communicating the primary cooling water replenishing port 6a and the secondary cooling water replenishing port 6b is arranged between the primary cooling water replenishing port 6a and the secondary cooling water replenishing port 6b, a replenishing valve 8 for controlling the communication and the shutoff of the replenishing water pipe 7 is arranged in the replenishing water pipe 7, and the automatic replenishing of the primary cooling water to the secondary cooling water is controlled by controlling the opening and the closing of the replenishing valve 8.

And the third electromagnetic valve 9 is used for controlling the opening and closing of the water replenishing valve.

The control module 4 is further configured to control the third electromagnetic valve 9 according to the water replenishing times, the single water replenishing duration and the water replenishing interval included in each water replenishing round in the second set logic when it is determined that the secondary cooling water needs to be replenished; the method specifically comprises the following steps: in each water replenishing within the water replenishing times, controlling the third electromagnetic valve 9 to open the water replenishing valve 8 according to the time length of each water replenishing; and controlling the third electromagnetic valve 9 to close the water replenishing valve 8 at each water replenishing interval before the water replenishing times are finished. For example, in one embodiment, a round of refill includes 3 refills, each for 5 seconds at 30 second intervals.

In the embodiment shown in fig. 2, the pressure sensor PI is arranged to detect the water pressure of the secondary cooling water of the water cooling system, the flow sensor FLI is arranged to detect the water flow of the secondary cooling water of the water cooling system, and whether water is required to be supplemented and whether the filter screen is required to be cleaned are determined according to the detection result. The method specifically comprises the following steps:

the control module 4 may determine that water needs to be supplied to the secondary cooling water when the water pressure detected by the pressure sensor PI is lower than the set water pressure threshold, and determine that water supply is completed after the water pressure detected by the pressure sensor PI is restored to the set normal pressure, at this time, the water supply valve 8 is in a closed state. Wherein, before the water pressure is recovered to the set normal pressure, the water replenishing can be repeatedly executed for a plurality of times.

The control module 4 determines that the filter screen needs to be cleaned when the water flow detected by the flow sensor FLI is lower than a set flow threshold, and determines that the cleaning is finished after the water flow detected by the flow sensor FLI is restored to a set normal flow, at this time, the water flow guide valve 30 is in an open state, and the water flow blowdown valve 40 is in a closed state. Wherein, before the flow rate is restored to the set normal flow rate, the multi-round filter screen cleaning can be repeatedly executed.

When the water pressure detected by the pressure sensor PI is lower than a set water pressure threshold value and the water flow detected by the flow sensor FLI is lower than a set flow threshold value, the control module 4 can determine that water is supplemented firstly, and if the water pressure is normal and the flow is also normal after water is supplemented, the filter screen cleaning operation is not required; and if the water pressure is normal after water supplement but the water flow is still lower than the set flow threshold, determining to carry out filter screen cleaning operation.

Of course, in other embodiments, the water replenishing and the filter screen cleaning may be performed periodically, for example, the control module 4 may determine that the filter screen cleaning is required when each cleaning cycle arrives according to a set cleaning cycle, and determine that the secondary cooling water needs to be replenished when each water replenishing cycle arrives according to a set water replenishing cycle.

When the water cooling system is used for cooling a heating component in the magnetic resonance imaging system, the filter screen cleaning and the secondary cooling water replenishing can be carried out when the magnetic resonance system does not scan at night. For example, the control module 4 may be turned on when the magnetic resonance system is not scanning at night.

In some magnetic resonance systems, an economic operation mode (EPM) of the liquid helium refrigeration system is provided, that is, in a case where the MRI system does not scan, in order to save energy, the liquid helium compressor is automatically turned off when the pressure of the superconducting magnet is lower than a set value, and the liquid helium compressor is automatically turned on when the pressure of the superconducting magnet is higher than a set value. The time for starting the EPM power-saving mode every time is generally 30 minutes, and in the time, the water cooling system can automatically clean the filter screen and replenish water until the normal operation state is recovered, and the cleaning can be finished within 5 minutes, so that the restarting of the liquid helium compressor and the normal operation of the MR system are not influenced completely.

Therefore, in combination with the EPM mode, when the liquid helium compressor is stopped, a water cooling system is not needed to refrigerate the liquid helium compressor, and the automatic cleaning and water replenishing work of the system is completed by utilizing the time interval. In addition, to minimize the impact on the customer's use of the MR system, the automatic cleaning and water replenishment of the cooling system may be selected to occur at night, for example, between 0 and 2 o' clock.

The water cooling system in the embodiment of the present invention is described in detail above, and the water cooling method in the embodiment of the present invention is described in detail below. The water cooling method in the embodiment of the present invention may be applied to the water cooling system in the embodiment of the present invention.

Fig. 3 is an exemplary flow chart of a water cooling method applied to a water cooling system according to an embodiment of the present invention. Wherein the water cooling system may comprise the water filtering device 1 described in fig. 1A and 1B. As shown in a solid line portion in fig. 3, the water cooling method may include: step S32, when the filter screen needs to be cleaned, according to the cleaning times, single cleaning time and cleaning intervals of each preset cleaning, aiming at each cleaning, according to the single cleaning time, the water flow guide valve is controlled to be closed, and meanwhile, the water flow sewage valve is controlled to be opened; and controlling the water flow guide valve to be opened and controlling the water flow blowdown valve to be closed at each cleaning interval before the cleaning times are finished.

When the water cooling system further comprises: when the water replenishing water pipe communicating the primary cooling water replenishing port and the secondary cooling water replenishing port and the water replenishing valve provided in the water replenishing water pipe are connected, as shown by a dotted line portion in fig. 3, the water cooling method may further include: step S34, when the secondary cooling water needs to be supplemented, controlling the water supplementing valve to be opened according to the water supplementing times, the single water supplementing time and the water supplementing interval which are preset in each water supplementing round, and controlling the water supplementing valve to be opened according to the single water supplementing time in each water supplementing time; and controlling the water replenishing valve to close at each water replenishing interval before the water replenishing times are completed.

When it is necessary to perform the filter cleaning and the water replenishment according to the monitoring result of the water pressure and the water flow rate of the secondary cooling water of the water cooling system, as shown by a dotted line portion in fig. 3, the water cooling method may further include: step S30, monitoring the water pressure and the water flow of the secondary cooling water of the water cooling system; when the water pressure is monitored to be lower than a set water pressure threshold value, determining that water supplement needs to be carried out on the secondary cooling water, executing a step S34, and determining that the water supplement is finished after the water pressure is restored to a set normal pressure; when the water flow is monitored to be lower than the set flow threshold, determining that the filter screen needs to be cleaned, executing step S32, and after the water flow is recovered to the set normal flow, determining that the cleaning is finished. When the water pressure is lower than a set water pressure threshold and the water flow is also lower than a set flow threshold, water supplement can be determined to be performed firstly, and if the water pressure is normal and the flow is also normal after water supplement, the filter screen cleaning operation is not required; and if the water pressure is normal after water supplement but the water flow is still lower than the set flow threshold, determining to carry out filter screen cleaning operation.

When the filter screen cleaning and water replenishing are periodically controlled, the method can determine that the filter screen cleaning is required when each cleaning period comes according to the set cleaning period, and determine that the secondary cooling water is required to be replenished when each water replenishing period comes according to the set water replenishing period.

When the water cooling system is used for cooling the heating part in the magnetic resonance imaging system, the water pressure and the water flow of the secondary cooling water of the water cooling system can be monitored when the magnetic resonance system does not scan at night.

According to the scheme, the gap is formed between the shell and the filter screen, the water inlet of the filter screen is provided with the water flow guide valve capable of closing and opening the water inlet of the filter screen, and the filter screen and the shell are provided with the water flow blow-down valve, so that when the water flow guide valve is opened and the water flow blow-down valve is closed, water flows enter the main circulation loop through the water outlet of the shell after being filtered by the filter screen to perform normal water cooling work; and when rivers guide valve closed rivers blowoff valve was opened, rivers can be through the space refluence between casing and the filter screen and advance the filter screen, and the rivers that wash behind the filter screen can be discharged through the blowoff valve fast, and is visible, through opening and closing of control rivers guide valve and rivers blowoff valve, can realize the automatic palirrhea washing to the filter screen.

Furthermore, a water replenishing pipe for communicating the primary cooling water replenishing port and the secondary cooling water replenishing port is arranged between the primary cooling water replenishing port and the secondary cooling water replenishing port, and a water replenishing valve for controlling the communication and the shutoff of the water replenishing pipe is arranged in the water replenishing pipe, so that the automatic water replenishing of the primary cooling water to the secondary cooling water can be controlled by controlling the opening and the closing of the water replenishing valve.

In addition, the water pressure of the secondary cooling water is detected by arranging a pressure sensor, and water supplement is triggered when the water pressure is lower than a set water pressure threshold value; the water flow of the secondary cooling water is detected by arranging the flow sensor, and the filter screen is triggered to be cleaned when the water flow is lower than a set flow threshold value. Or, by setting periodic water supplement and filter screen cleaning, automatic water supplement and filter screen cleaning can be realized, so that the water cooling system is basically maintenance-free, the time and cost of field service of a service engineer are saved, and the system shutdown caused by conventional maintenance of water supplement and filter screen cleaning is reduced.

Aiming at the magnetic resonance system, the system breakdown caused by too low water pressure or water path blockage can be avoided, so that the temperature rise of the magnet and the leakage of liquid helium can be avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.