CN111796227A - Cooling system, control method and magnetic resonance imaging equipment - Google Patents
Cooling system, control method and magnetic resonance imaging equipment Download PDFInfo
- Publication number
- CN111796227A CN111796227A CN201910275947.6A CN201910275947A CN111796227A CN 111796227 A CN111796227 A CN 111796227A CN 201910275947 A CN201910275947 A CN 201910275947A CN 111796227 A CN111796227 A CN 111796227A
- Authority
- CN
- China
- Prior art keywords
- circuit
- cooling
- fluid
- cooling circuit
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The application discloses a cooling system, a control method, a magnetic resonance imaging apparatus and a storage medium. Wherein, cooling system includes: a fluid circuit for cooling heat generating structures in the magnetic resonance imaging apparatus; a first cooling circuit thermally coupled to the fluid circuit; a second cooling circuit thermally coupled to the fluid circuit; and a controller for enabling the second cooling circuit to cool the fluid circuit upon determining that the first cooling circuit is malfunctioning. The cooling system according to the present application is based on a first cooling circuit and a second cooling circuit, which may be activated to cool the fluid circuit in case of a failure of the first cooling circuit. Like this, according to the cooling system of this application can avoid the main cooling circuit problem that can't cool off magnetic resonance imaging equipment when breaking down to improve and carry out refrigerated stability to equipment.
Description
Technical Field
The present application relates to the field of cooling technologies, and in particular, to a cooling system, a control method, a magnetic resonance imaging apparatus, and a storage medium.
Background
Cooling systems are used in a variety of devices. The cooling system may directly affect whether the device is functioning properly. For example, the cooling system may be applied in a medical imaging device. The cooling system may cool one or more structures (components) in the medical imaging device. In the event of a cooling system failure, the equipment being cooled cannot function properly. Therefore, how to improve the stability of the cooling system to the cooling of the equipment is a problem to be solved.
Disclosure of Invention
In view of this, the embodiment of the present application provides a cooling scheme to improve the stability of cooling the device.
According to an aspect of the present application, there is provided a cooling system including: a fluid circuit for cooling heat generating structures in the magnetic resonance imaging apparatus; a first cooling circuit thermally coupled to the fluid circuit; a second cooling circuit thermally coupled to the fluid circuit; and a controller for enabling the second cooling circuit to cool the fluid circuit upon determining that the first cooling circuit is malfunctioning. In summary, the cooling system according to the present application is based on a first cooling circuit and a second cooling circuit, which may be activated to cool the fluid circuit in case of a failure of the first cooling circuit. Like this, according to the cooling system of this application can avoid the main cooling circuit problem that can't cool off magnetic resonance imaging equipment when breaking down to improve and carry out refrigerated stability to equipment.
In some embodiments, the fluid circuit comprises a plurality of branches, wherein each branch comprises a heat exchanger, and at least one branch is provided with a bypass flow path to which the second cooling circuit is thermally coupled.
In some embodiments, the bypass flow path is provided in a first branch of the plurality of branches, the first branch being provided with a first heat exchanger, the first branch further comprising: a first valve body and/or a second valve body, wherein the first valve body is arranged at a first end of the first branch circuit on the side of a refrigerant inlet of the first heat exchanger, and the second valve body is arranged at a second end of the first branch circuit on the side of a refrigerant outlet of the first heat exchanger; the bypass flow path is connected to the first branch circuit between the first valve body and a refrigerant inlet of the first heat exchanger and between the second valve body and a refrigerant outlet of the first heat exchanger, and the bypass flow path is provided with a second heat exchanger and is thermally coupled with the second cooling circuit by the second heat exchanger. The first valve body according to the present application, when closed, blocks fluid in the main circuit from flowing into the first branch circuit. The second valve body, when closed, blocks fluid in the first branch from flowing into the main path. The first branch may be used, for example, to cool a helium compressor. The cooling system can stably cool the helium compressor, and can reduce helium loss, thereby improving the working stability of equipment (such as magnetic resonance imaging equipment).
In some embodiments, the fluid circuit comprises: a main road; a first pump body disposed in said main path for driving fluid from said main path into said plurality of branch paths and from said plurality of branch paths back to said main path; the first branch passage further includes a second pump body disposed in the bypass flow passage. In some embodiments, the bypass flow path is further provided with a one-way valve. The check valve may block the flow of the fluid in the first branch path into the bypass flow path when the first cooling circuit cools the fluid circuit, thereby improving the cooling efficiency of each branch path.
In some embodiments, the main circuit is further provided with a pressure sensor coupled with the controller; the controller is further configured to: acquiring a pressure signal from the pressure sensor; upon determining from the pressure signal that the pressure in the main circuit is below a pressure threshold, the first pump body, the first valve body and the second valve body are closed, and the second cooling circuit and the second pump body are enabled. The cooling system of the present application can determine whether the fluid circuit leaks based on the pressure signal of the pressure sensor. When the leakage of the fluid circuit reaches a certain condition (i.e. the pressure is lower than the pressure threshold), the cooling system of the present application can still perform normal cooling of the first branch.
In some embodiments, the main circuit is further provided with a temperature sensor coupled to the controller for monitoring the temperature of the fluid in the main circuit after cooling by the first cooling circuit; the controller is further configured to: acquiring a temperature signal from the temperature sensor; and when the temperature of the fluid cooled by the first cooling circuit is determined to be higher than a temperature threshold value according to the temperature signal, closing the first pump body, the first valve body and the second valve body, and starting the second cooling circuit and the second pump body. The embodiment of the application can determine whether the first cooling circuit is in fault according to the temperature signal of the temperature sensor, and automatically start the second cooling circuit when the fault is determined, so that the stability of cooling the fluid circuit is improved.
In some embodiments, the main circuit is further provided with a pressure sensor and a temperature sensor, both coupled to the controller, for monitoring the temperature of the fluid cooled in the main circuit by the first cooling circuit; the controller is further configured to: acquiring a pressure signal from the pressure sensor; acquiring a temperature signal from the temperature sensor; closing the first pump body, the first valve body and the second valve body and activating the second cooling circuit and the second pump body when it is determined from the pressure signal that the pressure in the main circuit is below a pressure threshold and from the temperature signal that the temperature of the fluid cooled by the first cooling circuit is above a temperature threshold. The embodiment of the application can determine whether the first cooling circuit has a fault according to the temperature signal of the temperature sensor and the pressure signal of the pressure sensor, and automatically start the second cooling circuit when the fault is determined, so that the stability of cooling the fluid circuit is improved.
In some embodiments, upon determining from the pressure signal that the pressure in the main circuit reaches a pressure threshold and from the temperature signal that the temperature of the fluid cooled by the first cooling circuit is above a temperature threshold, a main controller closes the first pump body, opens the first valve body and the second valve body, and activates the second cooling circuit and the second pump body. Through the control of the first valve body and the second valve body, the cooling system can be switched between a mode of cooling the first branch and a mode of cooling the plurality of branches, so that the flexibility of cooling the magnetic resonance imaging equipment is improved. In particular, when the pressure in the main circuit reaches a pressure threshold, the second pump body may drive fluid in the bypass flow path into each branch of the fluid circuit, thereby cooling each heat exchanger in the fluid circuit.
In some embodiments, the first cooling circuit is provided with one flow sensor coupled to the controller; the controller is further configured to: acquiring a flow signal from the flow sensor; and when the flow rate of the fluid in the first cooling circuit is determined to be lower than a flow rate threshold value according to the flow rate signal, closing the first pump body, the first valve body and the second valve body, and starting the second cooling circuit and the second pump body. The cooling system can automatically determine whether the first cooling circuit fails or not according to the flow sensor, and automatically start the second cooling circuit when the failure is determined, so that the stability of cooling the fluid circuit is improved.
In some embodiments, the cooling system further comprises: a second heat exchanger thermally coupling the fluid circuit with the second cooling circuit; a third heat exchanger thermally coupling the fluid circuit with the first cooling circuit.
In some embodiments, the cooling system further comprises: a fourth heat exchanger that is a three pass heat exchanger capable of thermally coupling the fluid circuit to the first and second cooling circuits, respectively. In some embodiments, the fluid circuit is provided with a temperature sensor coupled to the controller for monitoring the temperature of the fluid in the fluid circuit after cooling in the first cooling circuit; the controller is further configured to: acquiring a temperature signal from the temperature sensor; activating the second cooling circuit upon determining from the temperature signal that the temperature of the fluid cooled by the first cooling circuit is above a temperature threshold.
In some embodiments, the first cooling circuit is provided with a flow sensor; the controller is further configured to: acquiring a flow signal from the flow sensor; activating the second cooling circuit upon determining from the flow signal that the fluid flow in the first cooling circuit is below a flow threshold.
According to an aspect of the present application, there is provided a control method of a cooling system, characterized in that the cooling system includes: a fluid circuit for cooling heat generating structures in the magnetic resonance imaging apparatus; a first cooling circuit thermally coupled to the fluid circuit; a second cooling circuit thermally coupled to the fluid circuit; wherein the control method comprises the following steps: monitoring the first cooling circuit for a fault; activating the second cooling circuit to cool the fluid circuit upon determining that the first cooling circuit is malfunctioning. According to the control method, the first cooling circuit is monitored, the standby cooling circuit can be automatically started when the first cooling circuit fails, and therefore the stability of cooling the equipment is improved.
In some embodiments, the fluid circuit is provided with a temperature sensor for monitoring the temperature of the fluid in the fluid circuit after cooling in the first cooling circuit; the monitoring whether the first cooling circuit is faulty comprises: acquiring a temperature signal from the temperature sensor; determining from the temperature signal whether the temperature of the fluid cooled by the first cooling circuit is above a temperature threshold; determining that the first cooling circuit is malfunctioning upon determining that the temperature is above a temperature threshold. According to the control method, whether the first cooling circuit fails or not can be automatically determined according to the signal of the temperature sensor, so that the second cooling circuit can be automatically started when the failure is determined, and the stability of cooling the fluid circuit is improved.
In some embodiments, the first cooling circuit is provided with a flow sensor; the monitoring whether the first cooling circuit is faulty comprises: acquiring a flow signal from the flow sensor; determining from the flow signal whether the flow of fluid in the first cooling circuit is below a flow threshold; upon determining that the flow rate is below the flow rate threshold, determining that the first cooling circuit is malfunctioning.
According to an aspect of the application, a magnetic resonance imaging apparatus is provided, characterized in that the magnetic resonance imaging apparatus comprises a cooling system according to the application.
According to an aspect of the present application, there is provided a storage medium storing one or more programs, the one or more programs including instructions, which when executed by a cooling system, cause the cooling system to perform a control method of the cooling system according to the present application.
Drawings
The foregoing and other features and advantages of the present application will become more apparent to those of ordinary skill in the art to which the present application pertains by describing in detail preferred embodiments thereof with reference to the accompanying drawings, wherein:
FIG. 1 illustrates a schematic view of a cooling system 100 according to some embodiments of the present application;
FIG. 2 illustrates a schematic diagram of a cooling system 200 according to some embodiments of the present application;
FIG. 3 illustrates a schematic diagram of a cooling system 300 according to some embodiments of the present application;
FIG. 4 illustrates a schematic diagram of a cooling system 400 according to some embodiments of the present application;
FIG. 5 illustrates a flow chart of a method 500 of controlling a cooling system according to some embodiments of the present application;
FIG. 6 illustrates a flow diagram of a method 600 of monitoring a first cooling circuit according to some embodiments of the present application; and
FIG. 7 illustrates a flow diagram of a method 700 of monitoring a first cooling circuit according to some embodiments of the present application.
Wherein the reference numbers are as follows:
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present application, embodiments of the present application will now be described with reference to the accompanying drawings, in which like reference numerals refer to components that are identical in structure or similar in structure but identical in function.
Any illustrations, implementations, and/or implementations described herein as "some embodiments" are not to be construed as a more preferred or advantageous solution.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present application, and they do not represent the actual structure of the product. In addition, for simplicity and clarity of understanding, only one of the components having the same structure or function is schematically illustrated or labeled in some of the drawings.
In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate their degree of importance, order, and the like.
"thermally coupled" may also be referred to herein as "thermally connected," thermally coupled, "or" in thermal communication. "thermal coupling" relates to the manner in which heat is transferred between two or more physical systems (structures). The "thermal coupling" may be, for example, coupling by means of a heat exchanger (heat exchanger). The heat exchanger may be of various configurations capable of heat transfer, for example, a brazed plate heat exchanger.
In some application scenarios, the cooling system may cause the device to be cooled to be in a low temperature state. The device to be cooled may be, for example, various devices such as a medical imaging apparatus. The medical Imaging apparatus is, for example, a Magnetic Resonance Imaging (MRI) device. The cooling system proposed by the present application may comprise two cooling circuits. One of the cooling circuits is a main cooling circuit, and can cool structures needing cooling in the equipment. The other cooling circuit is a backup cooling circuit which can cool the equipment when the main cooling circuit fails. In conclusion, the cooling system can avoid the problem that the equipment cannot be cooled when the main cooling loop fails, so that the stability of cooling the equipment is improved.
FIG. 1 illustrates a schematic diagram of a cooling system 100 according to some embodiments of the present application. As shown in FIG. 1, the cooling system 100 includes a first cooling circuit 110, a second cooling circuit 120, a fluid circuit 130, and a controller 140.
The fluid circuit 130 may cool one or more heat generating structures in a device to be cooled (e.g., a magnetic resonance imaging device). In some embodiments, the structure requiring cooling in the magnetic resonance imaging apparatus may include: an Air Conditioning System (ACS), a Gradient Power Amplifier (GPA), a Radio Frequency Power Amplifier (RFPA), a Gradient Coil (GC), and a Helium Compressor (HC). The fluid circuit 130 may be thermally coupled to one or more heat generating structures in the magnetic resonance imaging device in order to cool the one or more heat generating structures. In the case of a helium compressor, the circuit for cooling the helium compressor may comprise a heat exchanger. The fluid circuit may absorb heat from the helium compressor through a heat exchanger in the circuit that refrigerates the helium compressor. In this way, the helium compressor can provide cooling to the cold head of the magnetic resonance imaging apparatus.
The first cooling circuit 110 is thermally coupled to the fluid circuit 130. The second cooling circuit 120 is thermally coupled to the fluid circuit 130. In this way, the first cooling circuit 110 may function as a primary cooling circuit and the second cooling circuit 120 may function as a backup cooling circuit. The second cooling circuit 120 is in a closed state when the first cooling circuit 110 is operating normally. The fluid in the first cooling circuit 110 and the second cooling circuit 120 may be, for example, cooling water, a mixture of water and alcohol, or a coolant (e.g., freon), among others. It is further noted that the first cooling circuit 110 and the second cooling circuit 120 may actually be various devices capable of providing a cryogenic fluid, and the present application is not limited thereto.
The controller 140 may be implemented, for example, by logic gates, switches, Application Specific Integrated Circuits (ASICs), programmable logic controllers, or embedded microcontrollers. The controller 140 is configured to enable the second cooling circuit 120 to cool the fluid circuit 130 upon determining that the first cooling circuit 110 is malfunctioning (i.e., the first cooling circuit 110 is unable to cool the fluid circuit 130).
In summary, the cooling system 100 according to the present application is based on the first cooling circuit 110 and the second cooling circuit 120, and the second cooling circuit 120 may be enabled to cool the fluid circuit 130 when the first cooling circuit 110 fails. In this way, the cooling system 100 according to the present application can avoid the problem that the device to be cooled cannot be cooled when the main cooling circuit fails, thereby improving the stability of cooling the device. In particular, for application scenarios involving helium, the cooling system 100 can reduce helium loss by improving stability of cooling the device, thereby improving operational stability of the device (e.g., magnetic resonance imaging device).
In some embodiments, the fluid circuit 130 may include one or more heat exchangers (not shown in fig. 1) and a first pump body (not shown in fig. 1). The first pump body may drive fluid in the fluid circuit through the one or more heat exchangers (not shown in fig. 1). In this way, the fluid circuit 130 may absorb heat from the one or more heat exchangers. Each heat exchanger may be used to cool a heat generating structure in the magnetic resonance imaging apparatus. In some embodiments, the fluid circuit 130 may be connected in series with a plurality of heat exchangers (i.e., the heat exchangers are arranged in series in the fluid circuit 130). In some embodiments, the fluid circuit 130 may connect multiple heat exchangers in parallel. In other words, the fluid circuit 130 may comprise a plurality of branches, each branch being provided with one heat exchanger. It should be understood that the fluid circuit 130 may also be arranged with the heat exchanger in other suitable manners according to the structure of the magnetic resonance imaging apparatus, which is not limited in this application.
In some embodiments, the fluid circuit 130 is provided with one temperature sensor coupled to the controller 140. The temperature sensor is used to monitor the temperature of the fluid in the fluid circuit 130 after cooling in the first cooling circuit 110.
Activating the second cooling circuit upon determining from the temperature signal that the temperature of the fluid cooled by the first cooling circuit is above a temperature threshold. The controller 140 is also configured to acquire a temperature signal from the temperature sensor. The controller 140 may activate the second cooling circuit upon determining from the temperature signal that the temperature of the fluid after cooling by the first cooling circuit 110 (i.e., the temperature detected by the temperature sensor) is above a temperature threshold. Here, the temperature threshold may be set as needed, for example, 40 degrees celsius. More specifically, the controller 140 may determine that the first cooling circuit 110 is unable to properly cool the fluid circuit 130 (i.e., determine that the first cooling circuit 110 is malfunctioning) upon determining that the temperature detected by the temperature sensor is above the temperature threshold. Accordingly, the controller 140 may enable the second cooling circuit 120 and shut down the first cooling circuit 110 when the temperature is above the temperature threshold. In addition, the controller 140 may perform an alarm operation when the temperature reaches an alarm threshold. For example, the alarm threshold is 30 degrees. Here, the alarm operation is, for example, an audible alarm, an indicator light alarm, or sending an alarm message, etc.
In some embodiments, the first cooling circuit 110 is provided with a flow sensor. The controller 140 is also used to acquire a flow signal from the flow sensor. The controller 140 may enable the second cooling circuit 120 upon determining from the flow signal that the fluid flow in the first cooling circuit 110 is below a flow threshold. More specifically, the controller 140 determines that the first cooling circuit 110 is malfunctioning when the fluid flow is below a flow threshold. Accordingly, the controller 140 may activate the second cooling circuit 120 and deactivate the first cooling circuit 110 when the fluid flow is below the flow threshold. The embodiment of the application can set the flow threshold value according to the requirement, for example, 25L/min.
In summary, the controller 140 may automatically determine whether the first cooling circuit 110 is malfunctioning based on a sensor (e.g., a temperature sensor or a flow sensor) and automatically activate the second cooling circuit 120 when the malfunction is determined, thereby improving the stability of cooling the fluid circuit 130.
FIG. 2 illustrates a schematic diagram of a cooling system 200 according to some embodiments of the present application. As shown in fig. 2, the fluid circuit 130 may include a main path 131 and a plurality of branch paths (e.g., 132,133,134,135, and 136). One heat exchanger (e.g., 1321,1331,1341,1351, and 1361) is provided for each branch. Wherein the branch 132 is the first branch. The heat exchanger 1321 is a first heat exchanger. At least one branch of the fluid circuit 130 is provided with a bypass flow path 1322. The second cooling circuit 120 is thermally coupled to the bypass flow path 1322.
The first heat exchanger 1321 may be thermally coupled to a heat generating structure (e.g., a helium compressor) in the magnetic resonance imaging apparatus.
As shown in fig. 2, in some embodiments, the first cooling circuit 110 is thermally coupled to the main path 131 by a third heat exchanger 111. The first branch 132 may include a bypass flow path 1322, a second pump block 1323, a second heat exchanger 1324, a first valve block 1325, and a second valve block 1326.
Wherein the first valve body 1325 is provided at a first end of the first branch 132 on the side of the refrigerant (i.e., fluid in the fluid circuit) inlet of the first heat exchanger 1321. The second valve body 1326 is provided at a second end of the first branch line 132 on the refrigerant outlet side of the first heat exchanger 1321. The first valve body 1325 and the second valve body 1326 may be, for example, two-way valves. The first valve body 1325 blocks the fluid in the main path 131 from flowing into the first branch path 132 when closed. The second valve body 1326, when closed, blocks fluid in the first branch 132 from flowing into the main passage 131. The bypass passage 1322 is connected to the first branch passage 132 between the first valve element 1325 and the refrigerant inlet of the first heat exchanger 1321 and between the second valve element 1326 and the refrigerant outlet of the first heat exchanger 1321. The bypass flow path 1322 is also provided with a second heat exchanger 1324 and is thermally coupled to the second cooling circuit 120 using the second heat exchanger 1324.
In some embodiments, the bypass flow path 1322 is also provided with a check valve 1327. Here, the check valve 1327 may prevent the fluid in the first branch passage 132 from flowing into the bypass passage 1322 when the first cooling circuit 110 cools the fluid circuit 130, thereby improving the cooling efficiency for each branch passage.
In some embodiments, the first valve body 1325 and the second valve body 1326 are in an open state, and fluid in the fluid circuit 130 may enter the plurality of branches including the first branch 132 from the main branch 131. In this way, the first cooling circuit 110 may cool a plurality of heat generating structures in the magnetic resonance imaging apparatus.
In some embodiments, the cooling system 200 may separate the first branch 132 and the main pathway 131 when the first valve body 1325 and the second valve body 1326 are closed, such that the first branch 132 forms a closed loop with the bypass flow path 1322.
In some embodiments, the cooling system 200 may include only one of the first valve body 1325 and the second valve body 1326. By the first valve body 1325 (or the second valve body 1326), the cooling system 200 may separate the first branch 132 and the main passage 131 such that the first branch 132 forms a closed loop with the bypass flow path 1322 without leakage from the fluid circuit 130.
In some embodiments, main circuit 131 is provided with one pressure sensor 138 coupled to controller 140. The controller 140 may acquire a pressure signal from the pressure sensor 138. The pressure signal may be an analog signal or a digital signal. Controller 140 may determine from the pressure signal whether the pressure in main circuit 131 is below a pressure threshold. The pressure threshold here is, for example, 0.7 MPa. In some scenarios, the fluid circuit 130 may experience a fluid leak. When fluid leaks, the pressure in the main passage 131 gradually decreases. When the pressure is below the pressure threshold, the controller 140 may determine that the fluid in the fluid circuit is not properly cooling the plurality of heat exchangers. In this case, the controller 140 may turn off the first cooling circuit 110 and turn on the second cooling circuit 120. For example, the controller 140 may open the pump (not shown in fig. 2) and the third valve 121 in the second cooling circuit 120 so that fluid in the second cooling circuit 120 begins to circulate through the second heat exchanger 1324. Upon activation of the second cooling circuit 120, the controller 140 may close the first pump 137, activate the second pump 1323, and close the first valve body 1325 and the second valve body 1326. In this way, the second pump body 1323 can drive the fluid to circulate in the loop formed by the bypass fluid 1323 and the first branch 132. The cooling system 200 of the present application may cool the first heat exchanger 1321 of the first branch 132 in the fluid circuit 130 through the second cooling circuit 120. Taking the application scenario of the magnetic resonance imaging apparatus as an example, the cooling system 200 can still cool the helium compressor normally in case of a fluid leakage in the fluid circuit 130.
In some embodiments, main circuit 131 is also provided with one temperature sensor 139 coupled to controller 140. The temperature sensor 139 is used to monitor the temperature of the fluid in the main path 131 after being cooled by the first cooling circuit 110. The controller 140 may also acquire a temperature signal from the temperature sensor 131. Upon determining from the temperature signal that the temperature of the fluid cooled by the first cooling circuit 110 is above the temperature threshold, the controller 140 may activate the second cooling circuit 120 and activate the second pump body 1323. Here, the temperature threshold may be set as needed, for example, 40 degrees celsius. More specifically, the controller 140 may determine that the first cooling circuit 110 is unable to properly cool the fluid circuit 130 (i.e., determine that the first cooling circuit 110 is malfunctioning) upon determining that the temperature detected by the temperature sensor is above the temperature threshold. Accordingly, the controller 140 may enable the second cooling circuit 120 and shut down the first cooling circuit 110 when the temperature is above the temperature threshold. In summary, the embodiment of the present application may determine whether the first cooling circuit 110 is faulty according to the temperature signal of the temperature sensor, and automatically start the second cooling circuit 120 when the fault is determined, thereby improving the stability of cooling the fluid circuit 130.
In some embodiments, main circuit 131 is provided with one pressure sensor 138 and one temperature sensor 139. The controller 140 may acquire a temperature signal and a pressure signal. Upon determining that the temperature of the fluid after cooling via the first cooling circuit 110 (i.e., the temperature of the temperature sensor 160) is above the temperature threshold and the pressure of the pressure sensor 138 is below the pressure threshold, the controller 140 may determine that the fluid pressure in the main circuit 131 does not satisfy the operating condition and that the first cooling circuit 110 is unable to properly cool the fluid circuit 130. Thus, the controller 140 may close the first cooling circuit 110, the first pump block 137, the first valve body 1325, and the second valve body 1326, enable the second cooling circuit 120, and open the second pump block 1323 closed. In this way, the second pump 1324 can drive the fluid in the bypass passage 1323 to cool the first heat exchanger 1321 of the first branch passage 132.
In some embodiments, upon determining from the pressure signal that the pressure in the main circuit 131 reaches a pressure threshold and from the temperature signal that the temperature of the fluid cooled by the first cooling circuit 110 is above a temperature threshold, the first pump 137 is closed, the first and second valves 1325, 1326 are opened, and the second cooling circuit 120 and the second pump 1323 are enabled. In this way, by controlling the first valve body 1325 and the second valve body 1326, the cooling system 200 can switch between a mode of cooling the first branch 132 and a mode of cooling the plurality of branches, thereby improving flexibility in cooling the magnetic resonance imaging apparatus. In particular, when the pressure in the main circuit reaches a pressure threshold, the second pump 1323 may drive fluid in the bypass flow path 1322 into each branch of the fluid circuit 130 to cool each heat exchanger in the fluid circuit 130.
In some embodiments, the first cooling circuit 110 is provided with one flow sensor 112 coupled to the controller 140. The controller 140 may acquire a flow signal from the flow sensor 112. In this way, the controller 140 may determine the fluid flow in the first cooling circuit 110 based on the flow signal. The controller 140 may monitor the operating state of the first cooling circuit 110 in real time and determine whether the fluid flow in the first cooling circuit 110 is below a flow threshold. The embodiment of the application can set the flow threshold value according to the requirement, for example, 25L/min. When the fluid flow is below the flow threshold, the controller 140 determines that the first cooling circuit 110 is malfunctioning, may shut down the first cooling circuit 110, and activate the backup cooling circuit (i.e., the second cooling circuit 120) and activate the second pump body 1323.
In summary, the controller 140 may automatically determine whether the first cooling circuit 110 is faulty according to a signal of a sensor (e.g., a temperature sensor, a pressure sensor, or a flow sensor), and automatically activate the second cooling circuit 120 when the fault is determined, thereby improving the stability of cooling the fluid circuit 130.
In addition, by controlling the states of the first valve body 1325 and the second valve body 1326, the cooling system 200 of the present application can selectively cool the first heat exchanger 1321 in the fluid circuit (i.e., cool the first branch 132 in the fluid circuit 130) or cool a plurality of heat exchangers in the fluid circuit 130 (i.e., cool a plurality of branches in the fluid circuit). In other words, by controlling the first valve body 1325 and the second valve body 1326, the cooling system 200 can switch between a manner of cooling the first branch 132 and a manner of cooling the plurality of branches, thereby improving flexibility in cooling the apparatus to be magnetic resonance imaged. Taking the magnetic resonance imaging apparatus as an example, the cooling system 200 may cool the helium compressor when cooling the first heat exchanger 1321. The cooling system 200 may cool a plurality of heat generating structures in the mri apparatus while cooling a plurality of heat exchangers in the fluid circuit 130.
FIG. 3 illustrates a schematic diagram of a cooling system 300 according to some embodiments of the present application. As shown in fig. 3, the cooling system 300 includes a first cooling circuit 110, a second cooling circuit 120, a fluid circuit 130, and a controller 140. In addition, the cooling system 300 further includes a second heat exchanger 1324 and a third heat exchanger 111. Here, the first cooling circuit 110 is thermally coupled to the fluid circuit 130 by means of the third heat exchanger 111. The second cooling circuit 120 is thermally coupled to the fluid circuit 130 by a second heat exchanger 1324.
In summary, the cooling system 300 can activate the second cooling system 120 to cool the cooling circuit 130 when the first cooling system 110 fails.
FIG. 4 illustrates a schematic diagram of a cooling system 400 according to some embodiments of the present application. As shown in fig. 4, the cooling system 400 includes a first cooling circuit 110, a second cooling circuit 120, a fluid circuit 130, and a controller 140.
In addition, the cooling system 400 further includes a fourth heat exchanger 190. The fourth heat exchanger 150 is a three pass heat exchanger. In other words, the fourth heat exchanger 150 includes three fluid passages capable of heat exchange. The three fluid channels are respectively connected to the fluid circuit 130, the first cooling circuit 110 and the second cooling circuit 120. The fourth heat exchanger 150 enables the fluid circuit 130 to be thermally coupled with the first cooling circuit 110 and the second cooling circuit 120, respectively.
In summary, the cooling system 300 can activate the second cooling system 120 to cool the cooling circuit 130 when the first cooling system 110 fails.
FIG. 5 illustrates a flow chart of a method 500 of controlling a cooling system according to some embodiments of the present application. Here, the cooling system may be, for example, the cooling system 100 shown in fig. 1, the cooling system 200 shown in fig. 2, the cooling system 300 shown in fig. 3, or the cooling system 400 shown in fig. 4. The control method 500 may be performed by the controller 140.
As shown in fig. 5, in step S501, it is monitored whether the first cooling circuit 110 is malfunctioning.
In step S502, upon determining that the first cooling circuit 110 is malfunctioning, the second cooling circuit 120 is enabled to cool the fluid circuit 130. In summary, the method 500 may automatically enable the backup cooling circuit when the first cooling circuit 110 fails by monitoring the first cooling circuit 110, thereby improving the stability of cooling the equipment.
In some embodiments, the fluid circuit 130 is provided with a temperature sensor 160. The temperature sensor 160 is used to monitor the temperature of the fluid in the fluid circuit 130 after cooling in the first cooling circuit 110. Step S501 may be implemented as method 600.
As shown in fig. 6, in step S601, a temperature signal from the temperature sensor 160 is acquired.
In step S602, it is determined whether the temperature of the fluid cooled by the first cooling circuit 110 is higher than a temperature threshold according to the temperature signal.
In step S603, upon determining that the temperature is above the temperature threshold, it is determined that the first cooling circuit 110 is malfunctioning.
In some embodiments, the first cooling circuit 110 is provided with one flow sensor 112. Step S501 may be implemented as method 700. In summary, the method 600 may automatically determine whether the first cooling circuit 110 is malfunctioning based on the signal of the temperature sensor and automatically activate the second cooling circuit 120 when the malfunction is determined, thereby improving the stability of cooling the fluid circuit 130.
As shown in fig. 7, in step S701, a flow rate signal from the flow rate sensor 112 is acquired.
In step S702, it is determined whether the flow rate of the fluid in the first cooling circuit is below a flow rate threshold based on the flow rate signal.
In step S703, upon determining that the flow rate is below the flow rate threshold, it is determined that the first cooling circuit is malfunctioning. In summary, the method 700 may automatically determine whether the first cooling circuit 110 is malfunctioning based on the signal from the flow sensor 112 and automatically activate the second cooling circuit 120 when the malfunction is determined, thereby improving the stability of cooling the fluid circuit 130.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of possible examples of the present application, and they are not intended to limit the scope of the present application, and equivalent embodiments or modifications, such as combinations, divisions, or repetitions of features, which do not depart from the technical spirit of the present application, should be included in the scope of the present application.
Claims (15)
1. A cooling system, characterized in that the cooling system comprises:
a fluid circuit (130) for cooling heat generating structures in the magnetic resonance imaging apparatus;
a first cooling circuit (110) thermally coupled to the fluid circuit (130);
a second cooling circuit (120) thermally coupled to the fluid circuit (130); and
a controller (140), said controller (140) for enabling said second cooling circuit (120) to cool said fluid circuit (130) upon determining a failure of said first cooling circuit (110).
2. The cooling system of claim 1,
the fluid circuit (130) comprises a plurality of branches (132,133,134,135,136), wherein each branch (132,133,134,135,136) comprises a heat exchanger (1321,1331,1341,1351,1361) and at least one branch is provided with a bypass flow path (1322), the second cooling circuit (120) being thermally coupled to the bypass flow path (1322).
3. The cooling system of claim 2,
the bypass flow path (1322) is provided to a first branch (132) of the plurality of branches (132,133,134,135,136), the first branch being provided with a first heat exchanger (1321),
the first branch (132) further comprises: a first valve body (1325) and/or a second valve body (1326), wherein the first valve body (1325) is disposed at a first end of the first branch passage (132) on a side of a refrigerant inlet of the first heat exchanger (1321), and the second valve body (1326) is disposed at a second end of the first branch passage (132) on a side of a refrigerant outlet of the first heat exchanger (1321);
the bypass flow path (1322) connects the first branch passage (132) between the first valve body (1325) and a refrigerant inlet of the first heat exchanger (1321) and between the second valve body (1326) and a refrigerant outlet of the first heat exchanger (1321),
and the bypass flow path is provided with a second heat exchanger (1324) and is thermally coupled to the second cooling circuit (120) by means of the second heat exchanger (1324).
4. The cooling system of claim 2,
the fluid circuit (130) further comprises:
a main path (131);
a first pump (137) disposed in said main circuit (131) to drive fluid from said main circuit (131) into said plurality of branches (132,133,134,135,136) and from said plurality of branches (132,133,134,135,136) back into said main circuit (131);
the first branch (132) further includes a second pump body (1323) disposed in the bypass flow path (1322).
5. A cooling system according to claim 4, characterized in that said main circuit (131) is further provided with a pressure sensor (138) coupled with said controller (140); the controller (140) is further configured to:
acquiring a pressure signal from the pressure sensor (138);
-upon determining from the pressure signal that the pressure in the main circuit (131) is lower than a pressure threshold, closing the first pump body (137), the first valve body (1325) and the second valve body (1326), activating the second cooling circuit (120) and the second pump body (1323).
6. A cooling system according to claim 4, characterized in that the main circuit (131) is further provided with a temperature sensor (139) coupled to the controller (140), the temperature sensor (139) being adapted to monitor the temperature of the fluid cooled in the main circuit (131) by the first cooling circuit (110); the controller (140) is further configured to:
acquiring a temperature signal from the temperature sensor (139);
-closing the first pump body (137), the first valve body (1325) and the second valve body (1326) and activating the second cooling circuit (120) and the second pump body (1323) when it is determined, from the temperature signal, that the temperature of the fluid cooled by the first cooling circuit (110) is higher than a temperature threshold value.
7. A cooling system according to claim 4, wherein the main circuit (131) is further provided with a pressure sensor (138) and a temperature sensor (139), the pressure sensor (138) and the temperature sensor (139) being coupled to a controller (140), the temperature sensor (139) being adapted to monitor the temperature of the fluid in the main circuit (131) after cooling in the first cooling circuit (110); the controller (140) is further configured to:
acquiring a pressure signal from the pressure sensor (138);
acquiring a temperature signal from the temperature sensor (139);
-closing the first pump body (137), the first valve body (1325) and the second valve body (1326) and activating the second cooling circuit (120) and the second pump body (1323) when it is determined from the pressure signal that the pressure in the main circuit (131) is lower than a pressure threshold and from the temperature signal that the temperature of the fluid cooled by the first cooling circuit (110) is higher than a temperature threshold.
8. The cooling system of claim 7, wherein the controller (140) is further configured to:
-upon determining from the pressure signal that the pressure in the main circuit (131) reaches the pressure threshold and from the temperature signal that the temperature of the fluid cooled by the first cooling circuit (110) is higher than the temperature threshold, closing the first pump body (137), opening the first valve body (1325) and the second valve body (1326), activating the second cooling circuit (120) and the second pump body (1323).
9. The cooling system according to claim 4, characterized in that the first cooling circuit (110) is provided with one flow sensor (112) coupled to the controller (140); the controller (140) is further configured to:
acquiring a flow signal from the flow sensor (112);
upon determining from the flow signal that the flow of fluid in the first cooling circuit (110) is below a flow threshold, closing the first pump body (137), the first valve body (1325), and the second valve body (1326), activating the second cooling circuit (120) and the second pump body (1323).
10. The cooling system of claim 1, further comprising:
a second heat exchanger (1324), the second heat exchanger (1324) thermally coupling the fluid circuit (130) with the second cooling circuit (120); a third heat exchanger (111), the third heat exchanger (111) thermally coupling the fluid circuit (130) with the first cooling circuit (110).
11. The cooling system according to claim 1, further comprising a fourth heat exchanger (150), the fourth heat exchanger (150) being a three-pass heat exchanger capable of thermally coupling the fluid circuit (130) with the first cooling circuit (110) and the second cooling circuit (120), respectively.
12. The cooling system according to claim 1, wherein the fluid circuit (130) is provided with a temperature sensor (139) coupled to the controller (140), the temperature sensor (139) being adapted to monitor the temperature of the fluid in the fluid circuit (130) after cooling in the first cooling circuit (110); the controller (140) is further configured to:
acquiring a temperature signal from the temperature sensor (139);
activating the second cooling circuit (120) upon determining from the temperature signal that the temperature of the fluid cooled by the first cooling circuit (110) is above a temperature threshold.
13. A cooling system according to claim 1, characterised in that the first cooling circuit (110) is provided with a flow sensor (112); the controller (140) is further configured to:
acquiring a flow signal from the flow sensor (112);
activating the second cooling circuit (120) upon determining from the flow signal that the fluid flow in the first cooling circuit (110) is below a flow threshold.
14. A method for controlling a cooling system, characterized in that,
the cooling system includes:
a fluid circuit (130) for cooling heat generating structures in the magnetic resonance imaging apparatus;
a first cooling circuit (110) thermally coupled to the fluid circuit (130);
a second cooling circuit (120) thermally coupled to the fluid circuit (130);
wherein the control method comprises the following steps:
monitoring (S501) whether the first cooling circuit is malfunctioning;
activating (S502) the second cooling circuit to cool the fluid circuit upon determining that the first cooling circuit is malfunctioning.
15. A magnetic resonance imaging apparatus, characterized in that the magnetic resonance imaging apparatus comprises a cooling system as claimed in any one of claims 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910275947.6A CN111796227A (en) | 2019-04-08 | 2019-04-08 | Cooling system, control method and magnetic resonance imaging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910275947.6A CN111796227A (en) | 2019-04-08 | 2019-04-08 | Cooling system, control method and magnetic resonance imaging equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111796227A true CN111796227A (en) | 2020-10-20 |
Family
ID=72804990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910275947.6A Pending CN111796227A (en) | 2019-04-08 | 2019-04-08 | Cooling system, control method and magnetic resonance imaging equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111796227A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746261A (en) * | 2020-11-27 | 2021-05-04 | 乐金显示光电科技(中国)有限公司 | Cooling system and control method thereof |
| CN112928872A (en) * | 2021-01-20 | 2021-06-08 | 广东韶钢松山股份有限公司 | Temperature monitoring method and system for water-cooled exciter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6276886U (en) * | 1985-10-31 | 1987-05-16 | ||
| CN104901557A (en) * | 2015-05-08 | 2015-09-09 | 株洲南车时代电气股份有限公司 | Intelligent converter cooling system and intelligent cooling control method |
| CN105020962A (en) * | 2015-07-24 | 2015-11-04 | 比赫电气（太仓）有限公司 | Medical nuclear magnetic resonance water chilling unit and working method thereof |
| WO2016109235A1 (en) * | 2014-12-29 | 2016-07-07 | General Electric Company | Cooling system and method for a magnetic resonance imaging device |
| CN106782994A (en) * | 2016-12-29 | 2017-05-31 | 上海联影医疗科技有限公司 | Cooling system and magnetic resonance equipment |
| CN108506076A (en) * | 2017-02-28 | 2018-09-07 | 长城汽车股份有限公司 | Turbine cooling system, control method and the vehicle of engine |
| JP2019037662A (en) * | 2017-08-28 | 2019-03-14 | キヤノンメディカルシステムズ株式会社 | Magnetic resonance imaging device |
-
2019
- 2019-04-08 CN CN201910275947.6A patent/CN111796227A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6276886U (en) * | 1985-10-31 | 1987-05-16 | ||
| WO2016109235A1 (en) * | 2014-12-29 | 2016-07-07 | General Electric Company | Cooling system and method for a magnetic resonance imaging device |
| CN104901557A (en) * | 2015-05-08 | 2015-09-09 | 株洲南车时代电气股份有限公司 | Intelligent converter cooling system and intelligent cooling control method |
| CN105020962A (en) * | 2015-07-24 | 2015-11-04 | 比赫电气（太仓）有限公司 | Medical nuclear magnetic resonance water chilling unit and working method thereof |
| CN106782994A (en) * | 2016-12-29 | 2017-05-31 | 上海联影医疗科技有限公司 | Cooling system and magnetic resonance equipment |
| CN108506076A (en) * | 2017-02-28 | 2018-09-07 | 长城汽车股份有限公司 | Turbine cooling system, control method and the vehicle of engine |
| JP2019037662A (en) * | 2017-08-28 | 2019-03-14 | キヤノンメディカルシステムズ株式会社 | Magnetic resonance imaging device |
Non-Patent Citations (1)
| Title |
|---|
| 解士杰: "《物之理》", 山东科学技术出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746261A (en) * | 2020-11-27 | 2021-05-04 | 乐金显示光电科技(中国)有限公司 | Cooling system and control method thereof |
| CN112746261B (en) * | 2020-11-27 | 2023-08-29 | 乐金显示光电科技(中国)有限公司 | Cooling system and control method thereof |
| CN112928872A (en) * | 2021-01-20 | 2021-06-08 | 广东韶钢松山股份有限公司 | Temperature monitoring method and system for water-cooled exciter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101735623B1 (en) | Brayton cycle refrigeration device | |
| US8240165B2 (en) | Liquid cooling circuits and method for electrical cabinets, drawers, bays, modules, circuit boards and electrical components using quick-disconnect fittings for interfacing to a host cooling source | |
| JP2003125555A5 (en) | ||
| JP4667778B2 (en) | Cryogenic cooling system and method with refrigeration apparatus | |
| US20110061419A1 (en) | Refrigeration system | |
| JP2006170606A (en) | Cryogenic cooling system having backup low-temperature storage device and method | |
| US20170023279A1 (en) | Pumped Refrigerant Cooling System With 1+1 To N+1 And Built-In Redundancy | |
| US20100154438A1 (en) | Ice thermal storage | |
| CN111796227A (en) | Cooling system, control method and magnetic resonance imaging equipment | |
| CN110953760B (en) | Magnetic refrigeration system | |
| JP5484289B2 (en) | Engine cooling water circulation system for testing | |
| US20240131901A1 (en) | Cooling system of a vehicle, comprising a coolant circuit which can be operated as a cooling circuit for an ac operation and as a heat pump circuit for a heating operation | |
| US9157668B2 (en) | Double inlet type pulse tube refrigerator | |
| JP5222494B2 (en) | Environmental tester | |
| JP2019505710A (en) | Dual helium compressor | |
| US10473740B2 (en) | Redundant cooling system for a magnetic resonance tomography system | |
| CN108431524A (en) | MRI system with double-compressor | |
| JP3051717B2 (en) | Cooling system | |
| JP2021156506A (en) | Water cooler | |
| JP5380310B2 (en) | Cryogenic refrigerator | |
| CN215260723U (en) | Cold station | |
| CN106618574B (en) | Cooling system and magnetic resonance equipment | |
| CN113405306A (en) | Cold station and anti-freezing method thereof | |
| CN109539432B (en) | Air conditioner cooling water circulation system and air conditioner cooling water loop control method | |
| JP2004150664A (en) | Cooling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |