Cold water and air conditioning integrated precise refrigerating unit special for magnetic resonance equipment

Abstract

The invention provides a cold water and air conditioning integrated precise refrigerating unit special for magnetic resonance equipment, which comprises an indoor unit and an outdoor unit connected with the indoor unit, the indoor unit comprises a refrigerating system, a cold water system, an air conditioning system and an electric control system, and the outdoor unit comprises a condensing system, the refrigerating system is connected with the condensing system, the cold water system and the air conditioning system, the refrigerating system and the condensing system provide refrigerants for evaporators in the cold water system and the air conditioning system, and the refrigerants subjected to heat exchange through the cold water system and the air conditioning system are recycled into the condensing system through the refrigerating system. The cold water system provides cold water for a heating part of the magnetic resonance equipment, and the air conditioning system provides temperature and humidity within a preset range for a scanning room and an equipment room of the magnetic resonance equipment; the electric control system is electrically connected with the refrigerating system, the condensing system, the cold water system and the air conditioning system. The problems that an existing scheme is high in cost, large in occupied area, high in construction difficulty and low in reliability are solved.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment cooling, and in particular to a precision refrigeration unit for magnetic resonance equipment that integrates cold water and air conditioning. Background Art

[0002] As people's health awareness continues to improve, the demand for medical examinations is also growing, and the number of people who take the initiative to undergo magnetic resonance imaging to rule out potential health risks is gradually increasing. As a result, more and more hospitals are equipped with magnetic resonance imaging equipment (MRI, also known as magnetic resonance equipment). When the MRI equipment is in operation, a large amount of heat is generated, part of which needs to be taken away by cooling water and discharged into the atmosphere through the refrigeration system; and the heat generated by the control cabinet and electrical cabinet needs to be cooled by a precision air-conditioning unit, and eventually the heat is also discharged into the atmosphere. Due to the strong magnetic field in the scanning room, ordinary independent air conditioners cannot be installed. Therefore, the precision air-conditioning unit also assumes the function of comfort air conditioning in the scanning room to ensure the comfort of patients during scanning.

[0003] Existing technical solutions typically require three pieces of equipment to meet the operating requirements of an MRI system: an outdoor primary chiller, an indoor secondary heat exchanger, and a precision air conditioning unit. The outdoor primary chiller and the indoor secondary heat exchanger form a chilled water cooling system. The outdoor primary chiller provides coolant at 5-15°C year-round, which is pumped to the indoor secondary heat exchanger via a primary water pump. The indoor secondary heat exchanger uses the low-temperature coolant as a cooling source, cooling deionized water in a plate heat exchanger. The deionized water is then pumped to the MRI equipment via a secondary water pump to achieve cooling.

[0004] Precision air conditioning units provide a constant temperature and humidity environment for the equipment room and scanning room through independent compression and refrigeration cycles. These units consist of indoor and outdoor units. The indoor units control temperature and humidity, while the outdoor units dissipate heat into the air. In winter, if heating is required indoors, the indoor units' electric heating function provides the heat.

[0005] During the operation of the magnetic resonance equipment, the existing technical solution requires the simultaneous configuration of an outdoor primary chiller, an indoor secondary heat exchanger, and a precision air-conditioning unit, which is costly. The outdoor primary chiller and the outdoor unit need to be installed outdoors, and the indoor secondary heat exchanger and the indoor unit need to be installed indoors, which requires a large amount of outdoor space and the usable space between indoor equipment. The outdoor primary chiller provides low-temperature coolant to the indoor secondary heat exchanger, which needs to be connected together with water pipes. The construction and welding are difficult and there is a risk of leakage. The connection between the indoor unit and the outdoor unit in the precision air-conditioning unit requires the use of copper pipes and cables, which requires two independent sets of indoor and outdoor connecting pipes. The construction is difficult and the technical requirements are high. In addition, these three devices are used in conjunction with the magnetic resonance equipment. If any device fails, the magnetic resonance equipment will not work. Summary of the Invention

[0006] In view of this, the main purpose of this application is to provide a precision refrigeration unit that integrates cold water and air conditioning for magnetic resonance equipment, which is conducive to solving the problems of high cost, large footprint, difficult construction and low reliability of existing solutions.

[0007] The present application provides a precision refrigeration unit dedicated to magnetic resonance equipment that integrates cold water and air conditioning, which includes an indoor unit and an outdoor unit connected to the indoor unit. The indoor unit includes a refrigeration system, a cold water system, an air conditioning system and an electronic control system. The outdoor unit includes a condensing system, wherein the refrigeration system is connected to the condensing system, the cold water system and the air conditioning system respectively. The refrigeration system and the condensing system provide refrigerant for the evaporators in the cold water system and the air conditioning system, and the refrigerant after heat exchange with the cold water system and the air conditioning system is recovered to the condensing system through the refrigeration system. The cold water system provides cold water for the heat-generating components of the magnetic resonance equipment, and the air conditioning system provides temperature and humidity within a preset range for the scanning room and equipment room of the magnetic resonance equipment; the electronic control system is electrically connected to the refrigeration system, the condensing system, the cold water system and the air conditioning system respectively.

[0008] As described above, the present application consists of two parts: an indoor unit and an outdoor unit. The indoor unit and the outdoor unit transfer heat through the refrigerant, that is, the refrigeration system of the indoor unit and the condensing system of the outdoor unit transfer heat through the refrigerant; the cold water system of the indoor unit transports low-temperature water through a water pump to exchange heat with various heat-generating components of the magnetic resonance equipment, the air-conditioning system controls the temperature and humidity of the equipment room and the scanning room by sending air to the equipment room and the scanning room, the electronic control system monitors and feeds back the operation status of each component in other systems in real time, and when any system fails, the electronic control system can promptly transmit the fault signal to the central processor of the magnetic resonance equipment to ensure the safe and reliable operation of the magnetic resonance equipment; the precision refrigeration unit is connected to the refrigeration system, the condensing system, and the cooling system through the refrigeration system, the condensing system, and the cooling system. The integrated design of the five systems, namely the water system, air-conditioning system and electronic control system, reduces unnecessary duplicate components and integrates the equipment that originally required three independent installations (outdoor primary chiller, indoor secondary heat exchanger and precision air-conditioning unit) into an integrated unit including indoor and outdoor units. This not only reduces the number of required moving parts, reduces costs and occupies space; it also simplifies the installation process, that is, the installation of the precision refrigeration unit only requires connecting the copper pipes of the indoor and outdoor units of the air-conditioning system in the indoor unit, the construction intensity is reduced by half, and the installation and maintenance are simple; compared with traditional design schemes, the precision refrigeration unit has a large number of moving parts and greatly improves reliability, avoiding the loss caused by the shutdown of magnetic resonance equipment due to fault maintenance.

[0009] Optionally, the refrigeration system includes: the inlet end of the drying filter is connected to the outlet end of the condensing system, the outlet end of the drying filter is connected to the sight glass, the pipeline provided with the sight glass is respectively connected to the first branch provided with the first electronic expansion valve and the second branch provided with the second electronic expansion valve, the first branch is connected to the cold water system and merges with the pipeline provided with the compressor, the second branch is connected to the air-conditioning system and merges with the pipeline provided with the compressor, the outlet end of the first branch and the outlet end of the second branch are respectively provided with return air temperature sensors; the main inlet valve of the electric three-way valve is connected to the outlet end of the compressor, the first diversion outlet valve of the electric three-way valve is connected to the third branch, the third branch is connected to the air-conditioning system and merges with the inlet end of the first branch, the second diversion outlet valve of the electric three-way valve is connected to the inlet end of the condensing system, a high-pressure sensor is provided on the pipeline connected to the second diversion outlet valve, and a low-pressure sensor is provided at the inlet end of the compressor.

[0010] From the above, the first branch provides heat exchange for the deionized water in the chilled water system, the second branch provides heat exchange for the filtered air in the air-conditioning system, and the third branch opened by the electric three-way valve supplements heat for the air-conditioning system in winter, reducing energy loss; the drying filter can remove moisture and other impurities in the refrigerant, protecting other components in the refrigeration system from corrosion and blockage; the sight glass can check whether there is moisture in the refrigerant and whether there is a lack of refrigerant medium in the pipeline; the electronic expansion valve intercepts and reduces the pressure, reducing the pressure of the liquefied high-pressure refrigerant into a low-temperature, low-pressure liquid; the setting of the high-pressure sensor and the low-pressure sensor enables the system to monitor the pressure at the inlet and outlet of the compressor, promptly detect and handle abnormal conditions, and avoid equipment damage; the return air temperature sensor helps to monitor the temperature of the refrigerant in real time and analyze whether there are any abnormalities.

[0011] Optionally, the air-conditioning system includes: an air filter, a finned evaporator, a heat recovery device, a humidifier and an air supply fan are arranged in sequence from the air inlet end to the air outlet end, wherein an air temperature sensor and a humidity sensor are arranged above the air supply fan, a water collection pan is arranged below the finned evaporator, the heat recovery device and the humidifier, and a one-way valve is arranged on the third branch connected to the outlet end of the heat recovery device.

[0012] As shown above, the air filter installed at the air inlet end can effectively remove dust, particulate matter and other impurities in the air entering the air-conditioning system; the finned evaporator is used to cool the air and reduce the air temperature by absorbing heat through the evaporation of the refrigerant; the heat recovery device can use the waste heat generated by the magnetic resonance equipment to preheat the cold air entering the air-conditioning system in winter, thereby improving energy utilization; the humidifier adds an appropriate amount of moisture to the air in a dry environment to maintain a suitable humidity level to prevent the air from being too dry to affect comfort or cause damage to certain equipment; the air temperature sensor and humidity sensor installed above the air supply fan can monitor the temperature and humidity of the outgoing air in real time; the water collection tray located below the finned evaporator, heat recovery device and humidifier is used to collect condensed water that may be generated during the operation of these devices to avoid water dripping and causing equipment damage or other safety hazards; the one-way valve installed on the third branch connected to the outlet end of the heat recovery device is used to prevent the refrigerant from flowing back and ensure that the refrigerant in the air-conditioning system flows in the predetermined direction.

[0013] Optionally, the condensation system includes: a condensing fan; a finned condenser, which is arranged on the air inlet side of the condensing fan, the inlet end of the finned condenser is connected to the pipeline where the second diversion outlet valve is set, and the outlet end of the finned condenser is connected to the drying filter.

[0014] As described above, the finned condenser arranged on the air inlet side of the condensing fan utilizes the forced airflow generated by the condensing fan to accelerate the heat dissipation on the surface of the finned condenser, so that the refrigerant can be converted from high-temperature and high-pressure gas to low-temperature and high-pressure liquid in a shorter time.

[0015] Optionally, the cold water system includes: a heat exchange pipeline, on which a plate evaporator, a water tank, a water pump, a cold water temperature sensor and a water pressure sensor are sequentially arranged from the water inlet end to the water outlet end, the water inlet end of the heat exchange pipeline is respectively connected to the water inlet branches in multiple magnetic resonance circuits, and the water outlet end of the heat exchange pipeline is respectively connected to the water outlet branches in multiple magnetic resonance circuits, and some of the water inlet branches are provided with flow sensors.

[0016] As mentioned above, the plate evaporator provides the required low-temperature deionized water for the various heat-generating components of the magnetic resonance equipment; the water tank is used as a buffer container to smooth out water flow fluctuations and ensure that the cold water system can operate stably under different loads; the water pump provides power for the water supply; the cold water temperature sensor is used to monitor the temperature of the outflowing low-temperature deionized water to ensure that it meets the heat exchange requirements of the magnetic resonance equipment; the water pressure sensor is used to monitor the water pressure in the cold water system to ensure that it is within a safe range. If the water pressure is too high or too low, it may cause the cold water system to malfunction or decrease in efficiency; the flow sensors installed on some water inlet branches of the magnetic resonance circuit can monitor the water flow in real time, so that the electronic control system can accurately adjust the water volume of multiple magnetic resonance circuits according to actual needs, ensuring that the cooling effect of each circuit is optimal, and improving the overall energy efficiency of the precision refrigeration unit.

[0017] Optionally, the second branch is connected to the air-conditioning system, including: the second branch is connected to the fin-type evaporator.

[0018] From the above, the second branch is connected to the finned evaporator in the air-conditioning system through a path provided with a second electronic expansion valve, so that the electronic control system can accurately adjust the amount of refrigerant entering the finned evaporator according to actual needs, thereby achieving precise control of the cooling capacity of the air-conditioning system.

[0019] Optionally, the third branch is connected to the air-conditioning system, including: the third branch is connected to the heat recovery device and the one-way valve in sequence.

[0020] As described above, the electric three-way valve preferentially guides the high-temperature and high-pressure gaseous refrigerant through the third branch, releasing heat through the heat recovery device. When heating is required in winter, the waste heat generated during the operation of the magnetic resonance equipment is used to preheat the air entering the air-conditioning system, realizing the effective reuse of energy; the one-way valve can effectively prevent the refrigerant from flowing back.

[0021] Optionally, the outlet end of the first branch and the outlet end of the second branch are respectively provided with return air temperature sensors, including: the return air temperature sensor includes a cold water return air temperature sensor and an air conditioning return air temperature sensor, the outlet end of the first branch is provided with a cold water return air temperature sensor, and the outlet end of the second branch is provided with an air conditioning return air temperature sensor.

[0022] As described above, a dedicated cold water return air temperature sensor is set on the first branch, and a dedicated air conditioning return air temperature sensor is set on the second branch, which can monitor the temperature of the refrigerant returning to the compressor from the plate evaporator and the fin evaporator in real time, so that the electronic control system can accurately adjust the working status of each system according to the actual operating conditions.

[0023] Optionally, the first branch is connected to a cold water system, including: the first branch is connected to a plate evaporator, and the plate evaporator performs heat exchange processing on high-temperature water from the water inlet branches in the multiple magnetic resonance circuits.

[0024] As described above, in the plate evaporator, heat is exchanged between the low-temperature, low-pressure liquid refrigerant from the first branch and the high-temperature water, thereby ensuring that the required low-temperature cooling water is provided to the various heat-generating components of the magnetic resonance equipment.

[0025] Optionally, the air conditioning system is further provided with a plurality of air ducts, and the plurality of air ducts independently provide the scanning room and the equipment room with temperature and humidity within respective preset ranges.

[0026] As mentioned above, the scanning room focuses more on patient comfort and usually needs to be maintained within a relatively comfortable temperature and humidity range; while the equipment room is more concerned with maintaining the optimal environmental conditions suitable for equipment operation. By setting up corresponding independent air ducts, the temperature and humidity of the air supplied are precisely adjusted according to the specific needs of each room, ensuring that both areas can obtain the best working environment.

[0027] In summary, the precision refrigeration unit for magnetic resonance equipment provided in this application, which integrates cold water and air conditioning, can not only provide the required low-temperature cooling water of different flow rates for multiple magnetic resonance circuits for the magnetic resonance equipment, but also provide precise temperature and humidity control for the human-machine environment, that is, provide constant temperature and humidity functions for the scanning room and the equipment room; the precision refrigeration unit has a simple installation structure and occupies a small area, and in winter, it recovers the heat generated by the magnetic resonance equipment and supplies it to the human-machine environment, with high reliability; the material cost, installation cost and manufacturing cost are all greatly reduced; compared with the traditional magnetic resonance cooling solution, the cost of this application is reduced by 30%, the space occupied is reduced by half, the installation of this application only requires connecting the copper pipes of the indoor and outdoor units, and the construction intensity is reduced by half; the repeated moving parts are greatly reduced, the reliability can be greatly improved, and the loss caused by equipment shutdown due to fault maintenance is avoided; as long as the magnetic resonance equipment is installed, it will continue to generate at least 6.5kW of heat. This application also recovers this part of the heat as a heating source for the air-conditioning system in winter, which saves 100% energy compared with the traditional electric heating solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following further illustrates the various technical features of the present application and the relationships between them with reference to the accompanying drawings. The accompanying drawings are exemplary, and some technical features are not shown in actual proportion. In addition, some drawings may omit technical features that are commonly used in the technical field to which the present application belongs and are not essential for understanding and implementing the present application, or additional technical features that are not essential for understanding and implementing the present application may be shown. In other words, the combination of the various technical features shown in the accompanying drawings is not intended to limit the present application. In addition, throughout the present application, the same figure numbers refer to the same content. The specific description of the drawings is as follows:

[0029] Figure 1 This is a structural diagram of a precision refrigeration unit integrating cold water and air conditioning specifically for magnetic resonance equipment in this application.

[0030] Description of Reference Numerals

[0031] 1- Refrigeration system, 101- Compressor, 102- Electric three-way valve, a- Main inlet valve, b- First diversion outlet valve, c- Second diversion outlet valve, 103- High-pressure sensor, 104- Dry filter, 105- Sight glass, 106- First electronic expansion valve, 107- Second electronic expansion valve, 108- Cold water return air temperature sensor, 109- Air conditioning return air temperature sensor, 110- Low-pressure sensor;

[0032] 2- condensation system, 201- finned condenser, 202- condensation fan;

[0033] 3-cold water system, 301-plate evaporator, 302-water tank, 303-water pump, 304-cold water temperature sensor, 305-water pressure sensor, 306-flow sensor;

[0034] 4-air conditioning system, 401-air filter, 402-finned evaporator, 403-heat recovery device, 404-humidifier, 405-water tray, 406-air blower, 407-air temperature sensor, 408-humidity sensor, 409-check valve;

[0035] 5-Electronic control system.

[0036] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present application are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present application.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0039] The following describes in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems using specific embodiments. The specific embodiments described below can be combined with each other to form new embodiments. The same or similar ideas or processes described in one embodiment may not be repeated in other embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0040] Figure 1 This is a structural diagram of a specific embodiment of the precision refrigeration unit for magnetic resonance equipment that integrates cold water and air conditioning. Figure 1 Take the example for explanation. The precision refrigeration unit includes an indoor unit and an outdoor unit, wherein the indoor unit is composed of a refrigeration system 1, a cold water system 3, an air conditioning system 4 and an electronic control system 5. The cold water system 3 exchanges heat with the magnetic resonance equipment through low-temperature deionized water (referred to as low-temperature water), and the air conditioning system 4 adjusts the temperature of the human-machine environment in the equipment room and the scanning room through air. In winter, the heat generated by the magnetic resonance equipment is released to the equipment room and the scanning room through a heat recovery device to achieve the purpose of energy saving. All systems in the indoor unit are integrated in a cabinet. The outdoor unit is composed of a condensing system 2, which includes a condensing fan 202 and a fin-type condenser 201. The indoor unit and the outdoor unit are connected together by copper pipes and cables.

[0041] Refrigeration system 1

[0042] The refrigeration system 1 consists of a compressor 101, an electric three-way valve 102, a high-pressure sensor 103, a drying filter 104, a sight glass 105, a first electronic expansion valve 106, a second electronic expansion valve 107, a cold water return air temperature sensor 108, an air conditioning return air temperature sensor 109 and a low-pressure sensor 110.

[0043] A low-pressure sensor 110 is provided at the inlet end of the compressor 101. The outlet end of the compressor 101 is connected to the main inlet valve a of the electric three-way valve 102. The second diversion outlet valve c of the electric three-way valve 102 is connected to the inlet end of the condensing system 2 through a pipeline. The pipeline on the second diversion outlet valve c is provided with a high-pressure sensor 103. The outlet end of the condensing system 2 is connected to the drying filter 104. The drying filter 104 is connected to the inlet end pipeline of the sight glass 105. The two parallel-connected first electronic expansion valves 106 and second electronic expansion valves 107 are both connected to the outlet end pipeline of the sight glass 105. The pipeline equipped with the first electronic expansion valve 106 is the first branch, and the pipeline equipped with the second electronic expansion valve 107 is the second branch. The first branch flows through the plate evaporator 301 in the chilled water system 3 and returns to the pipeline equipped with the low-pressure sensor 110. The chilled water return air temperature sensor 108 is installed on the side of the first branch near the low-pressure sensor 110. The second branch flows through the finned evaporator 402 in the air conditioning system 4 and returns to the pipeline equipped with the low-pressure sensor 110. The air conditioning return air temperature sensor 109 is installed on the side of the second branch near the low-pressure sensor 110. The first diversion outlet valve b of the electric three-way valve 102 is connected to the third branch. The third branch flows through the heat recovery device 403 in the air conditioning system 4 and then merges into the combined inlet of the first and second branches.

[0044] Condensation system 2

[0045] The condensation system 2 consists of a fin-type condenser 201 and a condensing fan 202. The fin-type condenser 201 is arranged on the air inlet side of the condensing fan 202. The fin-type condenser 201 can process the refrigerant in a high-temperature and high-pressure gaseous state into a low-temperature and high-pressure liquid refrigerant. The inlet and outlet ends of the fin-type condenser 201 are both connected to the refrigeration system 1, wherein the inlet end of the fin-type condenser 201 is connected to the pipeline of the second diversion outlet valve c provided with an electric three-way valve 102, and the outlet end of the fin-type condenser 201 is connected to the drying filter 104.

[0046] Chilled water system 3

[0047] The cold water system 3 consists of a plate evaporator 301 , a water tank 302 , a water pump 303 , a cold water temperature sensor 304 , a water pressure sensor 305 and a flow sensor 306 .

[0048] In the present application, the cold water system 3 includes four magnetic resonance circuits, which are denoted as the first magnetic resonance circuit, the second magnetic resonance circuit, the third magnetic resonance circuit and the fourth magnetic resonance circuit. The first magnetic resonance circuit includes the first water inlet branch and the first water outlet branch, the second magnetic resonance circuit includes the second water inlet branch and the second water outlet branch, the third magnetic resonance circuit includes the third water inlet branch and the third water outlet branch, and the fourth magnetic resonance circuit includes the fourth water inlet branch and the fourth water outlet branch. Flow sensors 306 are all provided at the positions of the first water inlet branch, the second water inlet branch and the third water inlet branch facing the water inlet.

[0049] The four water inlet branches converge into a main water inlet branch, which is connected to the inlet of the heat exchange side of the plate evaporator 301. A main water outlet branch is located behind the four water outlet branches, connected to the outlet of the heat exchange side of the plate evaporator 301. A water tank 302, a water pump 303, a cold water temperature sensor 304, and a water pressure sensor 305 are located on the main water outlet branch, sequentially along the direction of fluid flow. The inlet and outlet of the refrigerant side of the plate evaporator 301 are connected to the first branch. After interception and pressure reduction, the low-temperature, low-pressure liquid refrigerant flows through the first branch through the refrigerant side of the plate evaporator 301, undergoing heat exchange with the high-temperature deionized water (hereinafter referred to as high-temperature water) from the four water inlet branches, generating low-temperature cooling water (hereinafter referred to as cold water). This low-temperature cooling water flows through the four water outlet branches to cool the various heat-generating components of the magnetic resonance imaging device.

[0050] In the cold water system 3, the water pump 303 is turned on, and the water pressure sensor 305 detects the water pressure in the pipe on the water outlet main branch. The high-temperature deionized water is collected from the four water inlet branches into the water inlet main branch, then passes through the heat exchange side of the plate evaporator 301, flows through the water tank 302, the water pump 303 cold water temperature sensor 304 and the water pressure sensor 305 on the water outlet main branch, and flows out through the four water outlet branches.

[0051] Air conditioning system 4

[0052] The air conditioning system 4 is composed of an air filter 401 , a finned evaporator 402 , a heat recovery device 403 , a humidifier 404 , a water receiving tray 405 , a blower 406 , an air temperature sensor 407 and a humidity sensor 408 .

[0053] In the first chamber of the air conditioner, an air filter 401, a finned evaporator 402, a heat recovery device 403 and a humidifier 404 are arranged in sequence along the air flow direction, wherein a water receiving tray 405 is arranged below the finned evaporator 402, the heat recovery device 403 and the humidifier 404, and a one-way valve 409 is arranged at the outlet end of the heat recovery device 403. The one-way valve 409 can control the one-way flow of the refrigerant on the third branch to prevent the refrigerant from flowing back. The air filter 401 is arranged at the air inlet end of the first chamber of the air conditioner, and the finned evaporator 402 is arranged on the air outlet side of the air filter 401; an air supply fan 406, an air temperature sensor 407 and a humidity sensor 408 are arranged in the second chamber of the air conditioner, and the air supply fan 406 is arranged on the air outlet side of the second chamber to provide the equipment room and the scanning room with temperature and humidity within their respective preset ranges.

[0054] In one specific embodiment of the present application, the equipment room and the scanning room can each be equipped with independent air ducts. Each independent air duct connecting the rooms is equipped with a valve that can be independently opened and closed or adjusted in degree of opening under the command of the electronic control system 5. When the humidity in the equipment room needs to be increased, the electronic control system 5 can adjust the valve in the air duct leading to the equipment room to ensure that more moisture is delivered to that area.

[0055] The equipment room and the scanning room are respectively provided with independent temperature sensors and humidity sensors. The electronic control system 5 can monitor the temperature and humidity of the equipment room and the scanning room in real time, and adjust the temperature and humidity of the air sent into the corresponding room according to the actual environmental requirements to maintain its constant temperature and humidity environment.

[0056] If the humidity in the equipment room falls below the set value, the electronic control system 5 activates the corresponding humidifier 404 to add moisture to the air, thereby increasing the humidity. At this point, if the humidity in the scanning room already meets the required level, theoretically no additional moisture input is needed. Therefore, the air duct valve can be kept closed to avoid affecting the environmental conditions in the scanning room.

[0057] When the temperature and humidity in the scanning room are normal, but the humidity in the equipment room is insufficient, the humidity in the equipment room is precisely adjusted by closing the air duct valve in the scanning room and increasing the amount of humid air flowing into the equipment room. This design ensures that the two functional areas can achieve the appropriate temperature and humidity conditions according to their respective needs, while also improving the flexibility and efficiency of the precision refrigeration unit.

[0058] The electronic control system 5 is electrically connected to the refrigeration system 1, condensing system 2, chilled water system 3, and air conditioning system 4. Throughout the operation of the precision refrigeration unit, the electronic control system 5 controls the operation of the other systems, achieving precise control of temperature, humidity, and flow distribution. Furthermore, the electronic control system 5 monitors and provides real-time feedback on the operating status of each component. If any system malfunctions, the electronic control system 5 promptly transmits a fault signal to the central processing unit of the MRI device, ensuring safe and reliable operation of the MRI device.

[0059] In this application, the functions of the equipment that originally needed to be installed three times independently - the outdoor primary chiller, the indoor secondary heat exchanger and the precision air-conditioning unit - are integrated into an integrated unit that includes both indoor and outdoor units. Through this design, the outdoor primary chiller (responsible for cooling), the indoor secondary heat exchanger (used to adjust the temperature of deionized water) and the precision air-conditioning unit (serving air-conditioning needs) that originally needed to be installed separately are integrated together to form an overall solution that includes both indoor and outdoor unit components. This integrated design not only reduces costs and the required space, but also greatly simplifies the complexity of installation and maintenance, and improves the reliability and energy efficiency of the system. Therefore, it does not simply concentrate all functions in a single indoor or outdoor system, but through reasonable design, the indoor and outdoor parts work together to achieve effective management of the magnetic resonance equipment and its surrounding environment.

[0060] The indoor unit includes a refrigeration system 1, a chilled water system 3, an air conditioning system 4, and an electronic control system 5. These systems work together to provide deionized water at varying flow rates to multiple MRI circuits to meet the cooling requirements of the MRI equipment, while also maintaining a constant temperature and humidity environment in the equipment room and scanning room. These systems are integrated into a single cabinet, reducing floor space and simplifying installation.

[0061] The outdoor unit primarily consists of a condensing system 2 consisting of a condensing fan 202 and a finned condenser 201. This condensing system 2 in the outdoor unit is responsible for exchanging heat with the refrigeration system 1 in the indoor unit via an environmentally friendly refrigerant, helping to dissipate heat transferred from the chilled water system and air conditioning system in the indoor unit.

[0062] How it works

[0063] MRI equipment generates a large amount of heat when working, and the heat-generating components of the MRI equipment need to be cooled by cold water. The equipment room and scanning room of the MRI equipment require an air-conditioning system to maintain a constant temperature and humidity environment to meet the environmental requirements of the MRI equipment and provide patients with a comfortable medical environment.

[0064] Summer refrigeration cycle of chilled water system 3:

[0065] The cold water absorbs heat from various heat-generating components inside the magnetic resonance device and is heated to high-temperature water. The high-temperature water is then distributed through a magnetic resonance circuit by a distributor system of the magnetic resonance device and transported to the plate evaporator 301 in the cold water system 3 . The low-temperature, low-pressure liquid refrigerant inside the plate evaporator 301 absorbs the heat of the high-temperature water and then vaporizes to form a low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant flows through the compressor 101 through the first branch, and is pressurized by the compressor 101 to become a high-temperature, high-pressure gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant flows through the main inlet valve a-the second diversion outlet valve c of the electric three-way valve 102 and then enters the fin-type condenser 201 of the condensing system 2. The heat is forced to be dissipated by the condensing fan 202 and released to the outside. The low-temperature, high-pressure liquid refrigerant liquefied by the fin-type condenser 201 flows through the interception and pressure reduction of the first electronic expansion valve 106 to form a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant returns to the plate evaporator 301 in the cold water system 3, absorbs heat again, and forms a low-temperature, low-pressure gaseous refrigerant, completing the refrigeration cycle. After the high-temperature water absorbs heat from the low-temperature, low-pressure liquid refrigerant, it is cooled to become low-temperature water and enters the water tank 302 in the cold water system 3. It is then pressurized by the water pump 303 and enters the water supply circuit of the distributor system to supply the various heat-generating components of the magnetic resonance equipment, completing the water cycle.

[0066] Winter refrigeration cycle of air conditioning system 4:

[0067] After the high-temperature, high-pressure gaseous refrigerant output by compressor 101 dissipates heat in finned condenser 201 (with auxiliary heat removal by condensing fan 202), the liquefied low-temperature, high-pressure liquid refrigerant is intercepted and reduced in pressure by second electronic expansion valve 107 to form a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant absorbs heat and vaporizes in finned evaporator 402 of air conditioning system 4, ultimately returning to compressor 101. Outside air is purified by air filter 401 and then enters air conditioning system 4. The heat released by the purified air flowing through finned evaporator 402 is absorbed by the low-temperature, low-pressure liquid refrigerant, converting the purified air into low-temperature air. This low-temperature air is then transported to the equipment room and scanning room via air supply fan 406 to achieve ambient temperature control.

[0068] Winter cold water circulation of cold water system 3:

[0069] Cold water flows through the heat-generating components inside the MRI device, absorbing heat and heating it to high-temperature water. This high-temperature water then flows through the water inlet branch of the cold water system 3 to the plate evaporator 301. The low-temperature, low-pressure liquid refrigerant inside the plate evaporator 301 absorbs the heat from the high-temperature water and vaporizes, forming a low-temperature, low-pressure gaseous refrigerant. This low-temperature, low-pressure gaseous refrigerant is pressurized by the compressor 101 to become a high-temperature, high-pressure gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant flows through the main inlet valve a of the electric three-way valve 102. The electronic control system 5 intelligently distributes the refrigerant flow through the first diversion outlet valve b and the second diversion outlet valve c based on the heating requirements of the equipment room and the scanning room. The high-temperature, high-pressure gaseous refrigerant preferentially flows through the first diversion outlet valve b into the third branch, where it flows through the heat recovery unit 403 to release heat. If the heat demand from the heat recovery unit 403 is insufficient, the refrigerant flow through the first diversion outlet valve b is increased. The high-temperature, high-pressure gaseous refrigerant can also enter the condensation system 2 through the second diversion outlet valve c, releasing heat to the outside (forced heat dissipation by the condensing fan 202). The liquefied low-temperature, high-pressure liquid refrigerant flows through the first electronic expansion valve 106, intercepting and reducing the pressure to form a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant then returns to the plate evaporator 301, where it absorbs heat again, completing the refrigeration cycle. After the high-temperature water absorbs heat from the low-temperature, low-pressure liquid refrigerant, it cools to low-temperature water and enters the water tank 302. It is then pressurized by the water pump 303 and enters the water supply circuit of the distributor system to be supplied to the various heat-generating components of the magnetic resonance imaging system, completing the water cycle.

[0070] Winter heating and humidification cycle of air conditioning system 4:

[0071] After being purified of particulate matter by air filter 401, the purified air flows through heat recovery unit 403, where it absorbs heat released by the high-temperature, high-pressure gaseous refrigerant. This elevated purified air temperature creates high-temperature supply air. This high-temperature air is pressurized by air supply fan 406 and distributed through the duct system (i.e., separate air ducts for the equipment room and the scanning room, respectively). Humidifier 404 is activated as needed to adjust the supply air temperature and humidity to maintain a constant temperature and humidity.

[0072] Throughout the entire system's operation, the electronic control system 5 controls the operation of each system, achieving precise control of temperature, humidity, and flow distribution. It also monitors and provides real-time feedback on the operating status of each component. If a system malfunctions, the electronic control system 5 promptly transmits a fault signal to the MRI system's central processor, ensuring safe and reliable operation.

[0073] In summary, the precision refrigeration unit for magnetic resonance equipment provided in this application, which integrates cold water and air conditioning, can not only provide the required low-temperature cooling water of different flow rates for multiple magnetic resonance circuits for the magnetic resonance equipment, but also provide precise temperature and humidity control for the human-machine environment, that is, provide constant temperature and humidity functions for the scanning room and the equipment room; the precision refrigeration unit has a simple installation structure and occupies a small area, and in winter, it recovers the heat generated by the magnetic resonance equipment and supplies it to the human-machine environment, with high reliability; the material cost, installation cost and manufacturing cost are all greatly reduced; compared with the traditional magnetic resonance cooling solution, the cost of this application is reduced by 30%, the space occupied is reduced by half, the installation of this application only requires connecting the copper pipes of the indoor and outdoor units, and the construction intensity is reduced by half; the repeated moving parts are greatly reduced, the reliability can be greatly improved, and the loss caused by equipment shutdown due to fault maintenance is avoided; as long as the magnetic resonance equipment is installed, it will continue to generate at least 6.5kW of heat. This application also recovers this part of the heat as a winter heating heat source for the air-conditioning system, which saves 100% energy compared with the traditional electric heating solution.

[0074] It should be noted that, in the description herein, the terms "middle", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0075] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," "socketed," and the like should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integral structures; they may refer to mechanical connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0076] Unless otherwise defined, all technical and scientific terms used in this application are the same as those commonly understood by those skilled in the art to which this application belongs. In the event of any inconsistency, the meaning described in the full text of this application or the meaning derived from the content recorded in the full text of this application shall prevail. In addition, the terms used in this description are only for the purpose of describing the embodiments of the present application and are not intended to limit this application.

[0077] Note that the above are only preferred embodiments of the present application and the technical principles employed. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the technical concept of the present application, all of which fall within the scope of protection of the present application.

[0078] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A precision refrigeration unit for magnetic resonance equipment that integrates chilled water and air conditioning, comprising an indoor unit and an outdoor unit connected to the indoor unit, characterized in that: The indoor unit includes a refrigeration system, a chilled water system, an air conditioning system and an electric control system, and the outdoor unit includes a condensing system, wherein: The refrigeration system is connected to the condensing system, the cold water system, and the air conditioning system, respectively. The refrigeration system and the condensing system provide refrigerant to the evaporators in the cold water system and the air conditioning system. The refrigerant after heat exchange in the cold water system and the air conditioning system is recovered into the condensing system through the refrigeration system. The cold water system provides cold water to the heat-generating components of the magnetic resonance imaging device. The air conditioning system provides a temperature and humidity within a preset range for the scanning room and the equipment room of the magnetic resonance imaging device. The electronic control system is electrically connected to the refrigeration system, the condensation system, the cold water system, and the air-conditioning system respectively.

2. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 1 is characterized in that: The refrigeration system comprises: The inlet end of the filter drier is connected to the outlet end of the condensing system, and the outlet end of the filter drier is connected to a sight glass. The pipeline provided with the sight glass is respectively connected to a first branch provided with a first electronic expansion valve and a second branch provided with a second electronic expansion valve. The first branch is connected to the cold water system and merges with the pipeline provided with the compressor. The second branch is connected to the air conditioning system and merges with the pipeline provided with the compressor. The outlet ends of the first branch and the second branch are respectively provided with return air temperature sensors. The main inlet valve of the electric three-way valve is connected to the outlet end of the compressor, the first diversion outlet valve of the electric three-way valve is connected to the third branch, the third branch is connected to the air-conditioning system, and merges at the inlet end of the first branch, the second diversion outlet valve of the electric three-way valve is connected to the inlet end of the condensing system, a high-pressure sensor is provided on the pipeline connected to the second diversion outlet valve, and a low-pressure sensor is provided at the inlet end of the compressor.

3. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 2, characterized in that: The air conditioning system comprises: From the air inlet end to the air outlet end, an air filter, a finned evaporator, a heat recovery device, a humidifier and an air supply fan are arranged in sequence, wherein an air temperature sensor and a humidity sensor are arranged above the air supply fan, and a water receiving pan is arranged below the finned evaporator, the heat recovery device and the humidifier, and a one-way valve is arranged on the third branch connected to the outlet end of the heat recovery device.

4. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 3 is characterized in that: The condensation system comprises: Condensing fan; A finned condenser is arranged on the air inlet side of the condensing fan, the inlet end of the finned condenser is connected to the pipeline where the second diversion outlet valve is set, and the outlet end of the finned condenser is connected to the drying filter.

5. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 4, characterized in that: The cold water system comprises: The heat exchange pipeline is provided with a plate evaporator, a water tank, a water pump, a cold water temperature sensor and a water pressure sensor in sequence from the water inlet end to the water outlet end. The water inlet end of the heat exchange pipeline is respectively connected to the water inlet branches in multiple magnetic resonance circuits, and the water outlet end of the heat exchange pipeline is respectively connected to the water outlet branches in multiple magnetic resonance circuits, and some of the water inlet branches are provided with flow sensors.

6. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 3, characterized in that: The second branch is connected to the air conditioning system, including: The second branch is connected to the fin-type evaporator.

7. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 6, characterized in that: The third branch is connected to the air conditioning system, including: The third branch is connected to the heat recovery device and the one-way valve in sequence.

8. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 7, characterized in that: The outlet end of the first branch and the outlet end of the second branch are respectively provided with a return air temperature sensor, including: The return air temperature sensor includes a cold water return air temperature sensor and an air conditioning return air temperature sensor. The outlet end of the first branch is provided with the cold water return air temperature sensor, and the outlet end of the second branch is provided with the air conditioning return air temperature sensor.

9. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 5, characterized in that: The first branch is connected to the cold water system, including: The first branch is connected to the plate evaporator, and the plate evaporator performs heat exchange processing on the high-temperature water from the water inlet branches in the multiple magnetic resonance circuits.

10. The precision refrigeration unit integrating cold water and air conditioning for magnetic resonance equipment according to claim 3, characterized in that: The air conditioning system is further provided with a plurality of air ducts, and the plurality of air ducts independently provide the scanning room and the equipment room with temperature and humidity within respective preset ranges.

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