CN115776249A - Incubator constant temperature system special for magnetic resonance environment - Google Patents
Incubator constant temperature system special for magnetic resonance environment Download PDFInfo
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Abstract
The invention relates to the technical field of incubators for magnetic resonance environments, and discloses an incubator constant temperature system special for a magnetic resonance environment, which comprises: the cooling device comprises a liquid cooling cavity, a cooling liquid and a water injection hole, wherein the cooling liquid is filled in the liquid cooling cavity, and the upper surface of the liquid cooling cavity is provided with the water injection hole; the ultrasonic motor body is arranged inside the liquid cooling cavity, an upper end cover of the liquid cooling cavity is shared with a base of the ultrasonic motor body, and piezoelectric ceramics and a stator inside the ultrasonic motor body are arranged on the inner side surface of the upper end cover; this special incubator constant temperature system of magnetic resonance environment through the integrated design of ultrasonic motor body and liquid cooling chamber and speed increaser, can carry out the liquid cooling heat dissipation to the ultrasonic motor when the ultrasonic motor moves, through self physics cooling, do not need extra device to assist the cooling, simultaneously through multiple sensor monitoring, improve the stability and the work efficiency of device, simple structure, reliable and stable, the security is high, when guaranteeing ultrasonic motor normal operating, can make the ultrasonic motor work under magnetic resonance's environment.
Description
Technical Field
The invention relates to the technical field of incubators for magnetic resonance environments, in particular to an incubator constant temperature system special for the magnetic resonance environment.
Background
Magnetic resonance is the process of exposing human body to special magnetic field, exciting hydrogen atom nucleus with radio frequency pulse to cause hydrogen atom nucleus to resonate and absorb energy. After the radio frequency pulse is stopped, the hydrogen atomic nucleus sends out radio signals according to specific frequency, absorbed energy is released and recorded by a receiver outside the body, and an image is obtained through processing of an electronic computer, namely nuclear magnetic resonance imaging, the nuclear magnetic resonance imaging refers to that the spin axes of atoms inside an object are excited to be consistent by means of a magnetic field with certain intensity, a spin pulse is generated, and then the required image is generated through the pulse signal.
The magnetic resonance instrument has the main characteristic of strong magnetism, so all equipment and devices in the magnetic resonance environment forbid using magnetic materials, and the equipment or the devices are prevented from being attracted by the magnetic resonance to cause flying shot, and causing harm to patients, operators and imaging equipment.
The infant incubator is a medical instrument which provides a clean air and appropriate temperature and humidity for premature infants, dysplastic neonates and neonates, avoids cross infection of infants, promotes the development and growth of the premature infants and the dysplastic neonates, and provides a good ideal environment for the treatment of the neonates. The infant incubator control system implements servo control of the temperature (incubator temperature/skin temperature) in the incubator by using a computer technology, and performs heating control according to the set temperature and the measured temperature. The internal air is adjusted by adopting the heat convection principle, and a good environment with proper air temperature and humidity and similar to the uterus of a mother body is manufactured, so that the infant can be cultured and nursed.
It is the patience of these critically ill infants against the external environment that the infants cannot leave the incubator for treatment until the body is not restored. In clinical application, MRI is the most advantageous in diagnosis of the central nervous system and the musculature of joints of limbs. The main function of incubator is constant temperature system, traditional constant temperature equipment, and automatically controlled motor generally are the magnetic metal material, therefore traditional incubator can not use under the magnetic resonance environment, leads to sick danger can not in time effectual use MRI to carry out disease diagnosis and treatment, delays the state of an illness and treatment.
A traditional incubator constant temperature system generally adopts a permanent magnet synchronous motor, symmetrical current is introduced into a stator winding of the traditional permanent magnet synchronous motor to generate a stator rotating magnetic field, the stator rotating magnetic field generates current in a cage type winding relative to the rotation of a rotor to form a rotor rotating magnetic field, and the rotor starts to rotate in an accelerated manner from a standstill state due to asynchronous torque generated by the interaction of the stator rotating magnetic field and the rotor rotating magnetic field. The air in the incubator is circulated through the permanent magnet synchronous motor, and the purpose of temperature control is achieved through adjustment of heating power of the heater in the circulation process. The skin temperature sensor for the baby is generally made of a platinum resistance metal material, the skin temperature sensor is made of a metal material, and a strong nuclear magnetic resonance radio frequency field can generate a pyrogenic effect when the pyrogenic effect is used for nuclear magnetic resonance, so that a metal substance can be heated, and the skin can be scalded. The characteristics of the incubator restrict that the traditional incubator constant temperature system can not be used in the magnetic resonance environment.
Prior patent publication, a baby incubator convenient for magnetic resonance, publication No.: CN114469597a, discloses a baby incubator convenient for magnetic resonance, comprising: the first box body comprises a first support frame and a first box shell, and the first box shell is arranged on the first support frame; a lateral adjustment member disposed within the first housing; a vertical adjustment member disposed on the lateral adjustment member; the longitudinal adjusting piece is arranged on the vertical adjusting piece and comprises a longitudinal sliding piece and a longitudinal power piece, the longitudinal sliding piece is arranged on the vertical adjusting piece, and the longitudinal power piece is arranged on the first box body; the relay box is detachably connected with the first box shell and comprises a relay pipe and a second box body, one end of the relay pipe is detachably connected to the first box shell, and the other end of the relay pipe is detachably connected to the second box body; wherein: the transverse adjusting piece and the vertical adjusting piece align the longitudinal sliding piece with the second box body in the first box shell, and the longitudinal power piece pushes the longitudinal sliding piece to penetrate through the relay pipe and then enter the second box body.
Above-mentioned published design is heated through the non-magnetic pad that generates heat, reaches cold-proof purpose, but adopts this kind to press close to patient's health bottom to generate heat the pad and heat, can lead to the health back to be hotter, and the chest leads to each position heat inhomogeneous because there is not the heat radiation of health. Traditional incubator is all through heated air circulation heating, and the baby changes this kind of constant temperature mode into to this kind of environmental adaptation, can cause the uncomfortable of sick danger, reduces the travelling comfort. The heating pad is heated and contacts with the body of the sick and dangerous child, if the liquid leakage condition occurs, the sick and dangerous child may be caused to leak electricity to generate electric shock. The heating of heating pad can accelerate the loss of the inside moisture and salt content of sick and dangerous children's health.
Disclosure of Invention
In order to realize the working mode of the incubator with constant temperature of hot air circulation and ensure that the incubator can be used in a magnetic resonance environment, the life safety of the sick and dangerous children is ensured, the comfort is improved, and the treatment environment is not changed, the invention is realized by the following technical scheme: a liquid-cooled ultrasonic motor comprising:
the cooling device comprises a liquid cooling cavity, a cooling liquid and a water injection hole, wherein the cooling liquid is filled in the liquid cooling cavity, and the upper surface of the liquid cooling cavity is provided with the water injection hole;
the ultrasonic motor body is arranged inside the liquid cooling cavity, an upper end cover of the liquid cooling cavity is shared with a base of the ultrasonic motor body, and piezoelectric ceramics and a stator inside the ultrasonic motor body are arranged on the inner side surface of the upper end cover;
the control line of the ultrasonic motor body extends to the outside of the liquid cooling cavity through the channel inside the upper end cover, and the shell of the ultrasonic motor body is fixedly connected with the upper end cover of the liquid cooling cavity in a sealing mode.
Furthermore, a first fin is arranged on the outer side surface of the shell of the ultrasonic motor body, and a second fin is arranged on the outer side surface of the liquid cooling cavity.
Furthermore, a shell of the ultrasonic motor body is fixedly connected with an upper end cover of the liquid cooling cavity through a screw, and a sealing O ring, a sealing gasket or a sealant is arranged between the shell of the ultrasonic motor body and the upper end cover.
Further, the output shaft end of the ultrasonic motor body is provided with a speed increaser, and the speed increaser comprises:
the first gear is fixedly arranged on the surface of the output shaft;
the second gear is rotatably installed inside the speed increaser shell and is meshed with the first gear, and the diameter of the second gear is smaller than that of the first gear;
the third gear is coaxially designed with the second gear, and the diameter of the third gear is larger than that of the second gear;
and the fourth gear is fixedly installed at the output end of the speed increaser, and the diameter of the fourth gear is smaller than that of the third gear.
An incubator dedicated to a magnetic resonance environment, comprising:
the ultrasonic motor body is arranged in the equipment end, and the output end of the speed increaser is provided with an axial flow fan blade;
the air conveying openings are positioned on two sides of the bottom surface in the box body and are communicated with the air supply opening;
the air return opening is positioned on the surface of the end part of one side, close to the equipment end, in the box body and is circularly communicated with the air supply opening;
and the heating system is arranged between the axial flow fan blade and the air return opening.
Furthermore, the ultrasonic motor bodies are not less than two groups, a collecting channel is arranged at the air supply port of each ultrasonic motor body, a uniform flow island is arranged inside each collecting channel, the air supply channels are arranged in the conveying direction of each collecting channel, air outlets are arranged on two sides of each air supply channel, and the air outlets are communicated with the air conveying ports through air conveying pipes.
Further, the heating system includes:
the heat radiator is composed of heat conducting materials and is arranged at the air outlet position of the air supply outlet, and the heat conducting materials of the heat radiator are distributed in a mesh shape;
and the PTC ceramic heating element is connected with the heat conduction material in the radiator.
An incubator constant temperature system dedicated to a magnetic resonance environment, comprising:
the temperature monitoring modules are arranged inside and outside the box body, and are in electric signal connection with the ultrasonic motor body;
the shunt is arranged in an output loop of the ultrasonic motor body circuit and used for collecting the working current of the ultrasonic motor body, and the shunt is in electric signal connection with a controller of the ultrasonic motor body;
the temperature sensor I is arranged in a transformer winding of a driver of the ultrasonic motor body and used for collecting the temperature in the transformer winding of the driver, and the temperature sensor I is in electric signal connection with a controller of the ultrasonic motor body;
the temperature sensor II is arranged in the ultrasonic motor body and used for collecting the working temperature of the ultrasonic motor body, and the temperature sensor II is in electric signal connection with a controller of the ultrasonic motor body;
and the temperature setting module is used for setting the proper temperature inside the box body and the maximum heating temperature of the heating system.
Further, the output of speed increaser is equipped with the subassembly that tests the speed, the subassembly that tests the speed includes:
the coded disc is coaxially mounted with the axial flow fan blade, and a plurality of holes are carved on the surface of the coded disc;
and the photoelectric sensor is arranged on the side surface of the code disc and corresponds to the hole on the surface of the code disc.
Furthermore, the box body, the liquid cooling cavity, the ultrasonic motor body, the speed measuring assembly and the heating system are made of non-magnetic materials, and the gear inside the speed increaser is made of non-metallic non-magnetic materials.
Compared with the prior art, the invention has the following beneficial effects:
1. this special incubator constant temperature system in magnetic resonance environment through the integrated design of ultrasonic motor body and liquid cooling chamber and speed increaser, solves the defect that traditional ultrasonic motor rotational speed is low, can carry out the liquid cooling heat dissipation to the ultrasonic motor when the ultrasonic motor moves simultaneously, through self physics cooling, does not need extra device to assist the cooling, simple structure, reliable and stable, the security is high, when guaranteeing ultrasonic motor normal operating, can make the ultrasonic motor work under magnetic resonance's environment.
2. According to the incubator constant temperature system special for the magnetic resonance environment, the height of the incubator body can be reduced through the combined design of the incubator, the ultrasonic motor body and the heating system, and the incubator can enter the magnetic resonance scanning cavity to perform scanning imaging; meanwhile, the upper hot air and the lower hot air of the incubator circulate, and the air delivery ports are arranged on two sides of the bottom surface in the incubator body, so that the air supply area can be increased, the uniform diffusion of hot air is facilitated, the uniform temperature in the incubator is ensured, and the hot air is relatively soft.
3. This special incubator constant temperature system of magnetic resonance environment, through the combined design of the inside and outside temperature monitoring module of box and the supersound motor body and heating system, can carry out intelligent regulation to the inside temperature of incubator, make the inside temperature of incubator be in certain fit range all the time, the cooperation of shunt, temperature sensor one and temperature sensor two is used, can monitor the behavior of supersound motor, protects the operation of supersound motor simultaneously, avoids the supersound motor to damage.
4. This special incubator constant temperature system of magnetic resonance environment, through the design of supply-air outlet and collection passageway and even flow island, no matter single motor mode or many motor mode, can make the axial compressor fan blade evenly supply air to the air outlet of both sides, under the cooperative operation of many ultrasonic motor bodies and the independent operation of single ultrasonic motor body, the inside hot-blast even diffusion of box can all be guaranteed, and air supply effect is good.
Drawings
FIG. 1 is a schematic view of the combination structure of a liquid cooling chamber and an ultrasonic motor according to the present invention;
FIG. 2 is a schematic view of the speed increaser at the output end of the ultrasonic motor according to the present invention;
FIG. 3 is a schematic view of a velocity measurement module according to the present invention;
FIG. 4 is a schematic view of the surface structure of the code wheel of the present invention;
FIG. 5 is a schematic view showing the internal structure of the incubator of the present invention;
FIG. 6 is a schematic diagram of the distribution structure of the ultrasonic motor and the heating system of the present invention;
FIG. 7 is a schematic view of an air outlet structure of an axial-flow fan blade according to the present invention;
FIG. 8 is a schematic view of the internal structure of the heating system of the present invention;
FIG. 9 is a flow chart of an ultrasonic motor control system of the present invention;
FIG. 10 is a flow diagram of an incubator thermal cycle system of the present invention;
FIG. 11 is a flow chart of the incubator constant temperature system of the present invention;
FIG. 12 is a graph of ultrasonic motor protection monitoring data in accordance with the present invention;
FIG. 13 is a graph showing the temperature rising tendency of the incubator of the present invention.
In the figure: 1. a box body; 11. an equipment end; 2. a liquid-cooled chamber; 21. an upper end cover; 22. a water injection hole; 23. a second fin; 3. an ultrasonic motor body; 31. an output shaft; 32. a control line; 33. a first fin; 4. a speed increaser; 41. a first gear; 42. a second gear; 43. a third gear; 44. a fourth gear; 5. axial flow fan blades; 6. a speed measuring component; 61. code disc; 62. a photosensor; 7. an air supply outlet; 71. a collection channel; 72. a uniform flow island; 73. an air supply channel; 731. an air outlet; 8. a wind delivery pipe; 81. an air delivery opening; 9. a heating system; 91. a PTC ceramic heating element; 92. a heat sink; 10. and (4) an air return opening.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the incubator constant temperature system special for the magnetic resonance environment is as follows:
the first embodiment is as follows:
the structure of the ultrasonic motor comprises: the polarized annular piezoelectric ceramic plate is stuck on the annular elastic body with teeth on the end face to form a stator, the friction liner is stuck on the circular plate-shaped structure to form a rotor, and an elastic element (reed) provides pre-pressure between the stator and the rotor. The ring piezoelectric ceramic piece receives alternating voltage from a driving power supply to generate stretching deformation, the circumferential bending vibration of the stator is excited, the rotor obtains rotary motion through the friction transmission between the stator and the rotor, and the rotor outputs motion and torque through a shaft fixed with the rotor to do work outwards. The ultrasonic motor converts electric energy into micro-amplitude vibration of an elastic body (a stator) by utilizing the inverse piezoelectric effect of a piezoelectric material, and converts the micro-amplitude vibration into rotation of the rotor or linear motion of the rotor through friction transmission between the stator and the rotor (or the rotor).
Referring to fig. 1-2, a liquid-cooled ultrasonic motor includes:
The ultrasonic motor body 3 is installed inside the liquid cooling cavity 2, an upper end cover 21 of the liquid cooling cavity 2 is shared with a base of the ultrasonic motor body 3, piezoelectric ceramics and a stator inside the ultrasonic motor body 3 are installed on the inner side surface of the upper end cover 21, and a first fin 33 is arranged on the outer side surface of a shell of the ultrasonic motor body 3.
The control line of the ultrasonic motor body 3 extends to the outside of the liquid cooling cavity 2 through a passage in the upper end cover 21, the shell of the ultrasonic motor body 3 is fixedly connected with the upper end cover 21 of the liquid cooling cavity 2 in a sealing way, the shell of the ultrasonic motor body 3 is fixedly connected with the upper end cover 21 of the liquid cooling cavity 2 through a screw, and a sealing O ring, a sealing gasket or a sealant is arranged between the shell of the ultrasonic motor body 3 and the upper end cover 21.
The effect of conducting heat inside the ultrasonic motor body 3 is achieved by liquid cooling. The first fin 33 functions to increase heat exchange between the ultrasonic motor body 3 and the liquid. The whole motor is soaked in the closed liquid cooling cavity 2, heat is conducted through liquid in the cavity, and heat exchange is conducted between the liquid in the cavity and outside air through the liquid cooling cavity 2, so that the heat productivity of the ultrasonic motor body 3 is always kept in the optimal working range, and long-time continuous work can be achieved. The liquid cooling chamber 2 is made of nonmagnetic metal materials, has high heat conductivity, and the two sides of the liquid cooling chamber 2 are additionally provided with the two fins 23 to increase the heat exchange speed between the liquid in the liquid cooling chamber 2 and the outside air.
The base of the ultrasonic motor body 3 is designed as an upper end cover 21 of the whole liquid cooling chamber 2, the piezoelectric ceramics and the stator are directly installed in the upper end cover 21, and the control line 32 extends to the outside from the piezoelectric ceramics through a channel inside the upper end cover 21. Can guarantee like this that control line 32 does not contact with liquid, the casing of the supersound motor body 3 is fixed with upper end cover 21, and fixed through sealed O circle or sealed glue, guarantee that the liquid in the liquid cooling chamber 2 can not enter into inside the motor. The shell of the ultrasonic motor body 3 and the interior of the liquid cooling cavity 2 are subjected to metal oxidation treatment, so that the corrosion resistance of metal is improved, and the problem that the device is not corroded when the liquid is soaked for a long time is solved.
The ultrasonic motor body 3 and the liquid cooling cavity 2 are fixed in a screw mode, a sealing O ring, a sealing gasket, a sealant or the like is used for sealing between the ultrasonic motor body and the liquid cooling cavity, and cooling liquid adopts non-corrosive liquid, high in heat conduction efficiency and non-conductive liquid and comprises distilled water.
The output shaft 31 end of the ultrasonic motor body 3 is provided with a speed increaser 4, and the speed increaser 4 comprises: the first gear 41 is fixedly arranged on the surface of the output shaft 31; the second gear 42 is rotatably arranged inside the shell of the speed increaser 4, the second gear 42 is in gear engagement with the first gear 41, and the diameter of the second gear 42 is smaller than that of the first gear 41; the third gear 43 is coaxially designed with the second gear 42, and the diameter of the third gear 43 is larger than that of the second gear 42; and a fourth gear 44 fixedly installed at the output end of the speed increaser 4, wherein the diameter of the fourth gear 44 is smaller than that of the third gear 43.
The speed increaser 4 adopts the secondary drive structure, and whole speed increaser 4 adopts the design of no magnetism non-metallic device, and the material of gear is nonmetal nonmagnetic material such as POM, PEEK, PTFE, PPS, for the transmission efficiency who improves the gear, increases the bearing to all gears, and the bearing adopts ceramic bearing. The ceramic bearing has the advantages that: the ceramic bearing is made of ceramic materials, is nonmagnetic and can be applied to a magnetic resonance environment; because the density (6.00 g/cm) of the ceramic is lower than that of steel, the weight is light, the increase and the slippage of the load of a moving body generated by centrifugal force can be reduced, and the service life is greatly prolonged; the ceramic hardness is 1 time of that of a steel bearing, the wear resistance is high, and the surface damage of a channel caused by high-speed rotation can be reduced; the elastic modulus of the ceramic is 1.5 times higher than that of the steel bearing, the stress elasticity is small, and the deformation caused by large load can be reduced, so that the working speed is favorably improved, and higher precision is achieved; the friction coefficient of the ceramic is less than 30% of that of the steel bearing, so that the heat generated by friction can be reduced, and the premature bearing spalling failure caused by high temperature can be reduced.
Example two:
referring to fig. 5-8 and 10, an incubator dedicated to a magnetic resonance environment includes:
the side surface of box 1, 1 horizontal direction tip of box is equipped with equipment end 11, and the supersound motor body 3 is installed inside equipment end 11, and axial fan blade 5 is installed to the output of speed increaser 4.
The heat sink 92 is made of a heat conductive material having high heat conductivity, such as copper alloy or aluminum alloy. In order to increase the heat dissipation area of the heat sink 92 and facilitate sterilization, the heater is a "mesh" shaped heater. Even when the wind resistance of the radiator 92 is reduced, the heat radiation area can be increased, and the heating efficiency can be improved.
The heating system 9 is composed of the PTC ceramic heating element 91 and the radiator 92, the PTC heating element has the advantages of small thermal resistance and high heat exchange efficiency, and is an automatic constant-temperature and electricity-saving electric heater. The PTC heater can not generate any magnetic field, thus solving the defects of the traditional spiral tube heater. And the safety performance is outstanding, the phenomenon of 'red' on the surface of an electric heating tube heater can not be generated under any application condition, so that potential safety hazards such as scalding and fire hazards are caused.
And air delivery ports 81 are positioned on two sides of the bottom surface in the box body 1, and the air delivery ports 81 are communicated with the air supply port 7.
And the air return opening 10 is positioned on the surface of the end part of the inner part of the box body 1 close to one side of the equipment end 11 and is circularly communicated with the air supply opening 7.
The ultrasonic motor bodies 3 are not less than two groups, the air supply opening 7 of the ultrasonic motor body 3 is provided with a collecting channel 71, the collecting channel 71 is internally provided with a uniform flow island 72, the conveying direction of the collecting channel 71 is provided with an air supply channel 73, the two sides of the air supply channel 73 are provided with air outlets 731, and the air outlets 731 are communicated with the air delivery openings 81 through air delivery pipes 8.
The invention adopts a multi-ultrasonic motor working mode, and has the advantages that:
1. after the traditional ultrasonic motor passes through the liquid cooling device, although the rotating speed can meet the air supply requirement, the friction material of the working characteristic of the ultrasonic motor has certain abrasion and the reduction of the torsion along with the accumulation of the working time. The accumulated working life of the traditional ultrasonic motor is generally designed to be about 5000h, and the working application scene of the traditional ultrasonic motor is short-time working, so the working life can be generally ignored. However, the ultrasonic motor is applied to a circulating fan on a constant temperature system, and the operating characteristics of the ultrasonic motor are as follows: high rotation speed and long working time. The life of the ultrasonic motor is insufficient as a blower motor on the incubator constant temperature system. The two liquid cooling devices can be matched to work, so that the service life of the whole constant temperature system is prolonged, and the maintenance period is prolonged.
2. Although the ultrasonic motor is accelerated, the rotating speed of the ultrasonic motor is still deficient compared with the rotating speed of tens of thousands of revolutions of the traditional motor, and the air volume cannot reach the air volume in the traditional incubator. If the single-motor mode is adopted, when the deviation between the actual temperature and the set temperature in the incubator is overlarge, the single motor is slow in temperature rise, long in temperature rise time and inconvenient to use. The double-motor mode is adopted, the double motors can be started simultaneously at the initial stage of equipment starting, the circulation flow of the air duct of the constant-temperature system is increased, the temperature is rapidly increased, and when the set temperature is approached, the single-motor alternative use mode is started to work, so that the temperature is kept constant. The incubator warming effect under the incubator environment can reach the warming effect of the traditional incubator.
3. The ultrasonic motor is characterized in that the motor is burnt out after working for a long time, and the working performance is influenced. Although adopting the liquid cooling device to cool down, because the liquid cooling device volume is miniaturized, the process of intensification also can exist at continuous operation in-process in a small amount of cooling liquid, when the temperature was too high, can lead to the pressure of 2 inside liquid cooling chambeies too big, causes revealing of 2 liquid cooling chambeies easily, destroys the closure in 2 liquid cooling chambeies. Through many motors mode, adopt the mode to motor temperature acquisition, after single motor temperature exceeded the settlement, just stop work, self begins the cooling, is replaced by other motor work, and many motors work in turn, solve the problem of temperature rise.
4. Because the thermostatic system has a failure in the core of the infant incubator, the loss of the thermostatic performance will not have a thermostatic effect on the temperature inside the incubator, and will cause a life risk to the patient inside the incubator. In the multi-motor mode, once one motor goes wrong, the other motor can replace the motor to work, and under the condition of alarming, the internal environment temperature of the incubator can be ensured not to change in a short time.
The design of the multi-ultrasonic motor 3 also needs to consider that the air sent out must be evenly sent into the incubator no matter the single motor works or the double motors work, so as to prevent the temperature of one side of the incubator from being higher, thereby influencing the uniformity of the temperature.
The design of the air supply channel 73 considers the uniformity of air supply at two sides, and firstly, all air supply, whether single air supply or multiple air supply, needs to ensure that the heated airflow is collected to the middle position of the air supply channel 73 and then reaches the air outlets 731 at two sides from the middle position to achieve the uniformity and consistency of the temperatures at two sides.
The plurality of air supply outlets 7 are all in the collection channel set 71 in the middle, and the collection channel 71 is designed for single-motor air supply, so that the single-side air supply does not only supply air to one side, and the air is collected in the middle and then discharged to two sides from the middle. The uniform flow island 72 is designed in the collecting channel 71, and the design function of the uniform flow island 72 is to disperse the air flow collected to the middle and ensure that the wind power flowing out of the collecting channel 71 is uniform.
Example three:
referring to fig. 3-4, 9, 11-13, a thermostat system for an incubator dedicated to a magnetic resonance environment includes:
the temperature monitoring modules are arranged inside and outside the box body 1 and are in electric signal connection with the ultrasonic motor body 3;
the shunt is arranged in an output loop of the circuit of the ultrasonic motor body 3 and is used for collecting the working current of the ultrasonic motor body 3, and the shunt is connected with a controller of the ultrasonic motor body 3 through an electric signal;
the first temperature sensor is arranged inside a transformer winding of a driver of the ultrasonic motor body 3 and used for acquiring the temperature inside the transformer winding of the driver, and the first temperature sensor is in electric signal connection with a controller of the ultrasonic motor body 3;
the second temperature sensor is arranged in the ultrasonic motor body 3 and used for collecting the working temperature of the ultrasonic motor body 3, and the second temperature sensor is in electric signal connection with a controller of the ultrasonic motor body 3;
and the temperature setting module is used for setting the proper temperature inside the box body 1 and the maximum heating temperature of the heating system.
Triple protection of the ultrasound motor body 3: the first protection is to add a current divider in an output loop to collect working current. After the working temperature of the ultrasonic motor rises, the working load is increased, the working current of the driver can be increased, the working voltage of the shunt is sampled, the real-time detection of the working current is achieved, the current working range of the ultrasonic motor can be set according to the scheme, when the working voltage exceeds the current range, the controller can stop controlling the driver in time, meanwhile, an alarm signal is sent out, and the effect of protecting the ultrasonic motor is achieved.
Double protection: and a temperature sensor is added in a transformer winding of the driver for temperature acquisition. When the working power consumption exceeds the working condition of the ultrasonic motor, the transformer exceeds the self bearing capacity and is overheated, and the controller can stop controlling the driver in time through acquiring the temperature of the transformer when the temperature of the transformer is overhigh, so that the effect of protecting the driver is achieved.
Triple protection: the temperature monitoring of the ultrasonic motor is mainly characterized in that whether the temperature is in a proper range or not because the ultrasonic motor can work for a long time, and when the temperature of the ultrasonic motor exceeds a set value, the controller can timely stop controlling the driver, so that the effect of protecting the ultrasonic motor is achieved.
The output of speed increaser 4 is equipped with speed measuring component 6, and speed measuring component 6 includes: the coded disc 61 is coaxially arranged with the axial flow fan blade 5, and a plurality of holes are carved on the surface of the coded disc 61; and a photoelectric sensor 62 mounted on the side surface of the code wheel 61 corresponding to a hole on the surface of the code wheel 61.
The coded disc 61 is mounted to move synchronously with the axial flow fan blades 5. The coded disc 61 is made of nonmagnetic metal materials or glass and plastic, and carved holes are reserved on the coded disc 61, and the number of the carved holes is generally within 10. Because the code wheel 61 is made of opaque material, when the code wheel 61 rotates and the engraved holes pass through the photoelectric sensor 62, light emitted by the light emitting diode is received by the photoelectric tube to form a pulse signal to the controller, and when the number of received pulses is the number of engraved holes on the code wheel 61, the operation is one turn.
The photoelectric sensor 62 can form a closed-loop control with the ultrasonic motor, so that the air supply speed can be controlled; meanwhile, the motor protection function is achieved, when a working instruction is sent out, no motion feedback signal is output, the fact that the speed increaser 4 has a problem is indicated, a user is reminded of breaking down, the motor is stopped to work, and the motor anti-blocking function is achieved.
The box body 1, the liquid cooling cavity 2, the ultrasonic motor body 3, the speed increaser 4, the speed measuring component 6 and the heating system 9 are made of nonmagnetic materials.
Taking two ultrasonic motors 3 as an example, the working process of the incubator constant temperature system is described:
and starting the constant temperature system, starting the equipment for self-checking, and sending an alarm signal if the self-checking has a problem. After the self-checking is normal, the constant temperature system starts to work, and the working condition monitoring of the ultrasonic motor body 3 is performed in the whole constant temperature system process, and mainly comprises the three monitoring protection transformer temperature, the motor temperature and the working current of the ultrasonic motor. The temperature monitoring module in the constant temperature system can simultaneously detect the internal temperature inside the incubator and the external environment temperature of the incubator.
When the constant temperature system detects that the temperature of the incubator is lower than 25 ℃, the two ultrasonic motor bodies 3 are started to work simultaneously, the rotating speed of the motor is highest, the air quantity of the air duct is maximum, the temperature rise is fastest, but the temperature rise of the motor is fastest; meanwhile, the temperature of the motor is continuously monitored, when the temperature of the motor is between 20 and 25 ℃, the rotating speed of the motor is reduced to about 1500r/min, and the heating speed of the motor is reduced; when the temperature of the motor exceeds 25 ℃, the temperature of the motor reaches an alarm value, the motor stops working, and an alarm signal is sent out to remind a user that the motor has a problem. After the environment temperature of the incubator reaches 25 ℃, or the internal temperature of the incubator is higher than 25 ℃ when the constant temperature system is started.
Firstly, the first motor continues to work, the second motor stops working, and the second motor begins to cool; when the temperature of the first motor is lower than 22 ℃, the first motor continues to work, but when the temperature of the first motor is higher than 22 ℃, the second motor stops working, and meanwhile, once the temperature of the second motor is higher than 22 ℃, the second motor stops working, and the first motor continues to work. The scheme is the alternate operation of two motors.
The constant temperature system can monitor the ambient temperature at the same time, and when the ambient temperature is lower than 27 ℃, the maximum temperature of the heating system 9 is 70 ℃; when the ambient temperature is higher than 27 ℃, the maximum temperature of the heating system 9 is increased by 7 ℃ for the set temperature of the culture.
The maximum temperature adjustment through the air supply flow and the heating system 9 are mutually matched, so that the fast heating speed and the good temperature stability can be realized. The protection function of the ultrasonic motor is added, and the service life of the ultrasonic motor is prolonged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A liquid-cooled ultrasonic motor, comprising:
the liquid cooling device comprises a liquid cooling cavity (2), wherein cooling liquid is filled in the liquid cooling cavity (2);
the ultrasonic motor body (3) is arranged inside the liquid cooling cavity (2), an upper end cover (21) of the liquid cooling cavity (2) is shared with a base of the ultrasonic motor body (3), and piezoelectric ceramics and a stator inside the ultrasonic motor body (3) are arranged on the inner side surface of the upper end cover (21);
the control line of the ultrasonic motor body (3) extends to the outside of the liquid cooling cavity (2) through the channel inside the upper end cover (21), and the shell of the ultrasonic motor body (3) is fixedly connected with the upper end cover (21) of the liquid cooling cavity (2) in a sealing mode.
2. The liquid-cooled ultrasonic motor of claim 1, wherein the housing of the ultrasonic motor body (3) has a first fin (33) on an outer surface thereof and the liquid-cooled chamber (2) has a second fin (23) on an outer surface thereof.
3. The liquid-cooled ultrasonic motor according to claim 1, wherein the housing of the ultrasonic motor body (3) is fixedly connected with the upper end cover (21) of the liquid-cooled chamber (2) through screws, and a sealing O-ring, a sealing gasket or a sealant is arranged between the housing of the ultrasonic motor body (3) and the upper end cover (21).
4. The liquid-cooled ultrasonic motor according to claim 1 or 2, wherein the output shaft (31) end of the ultrasonic motor body (3) is provided with a speed increaser (4), the speed increaser (4) comprising:
the first gear (41) is fixedly arranged on the surface of the output shaft (31);
a second gear (42) rotatably mounted inside the casing of the speed increaser (4), wherein the second gear (42) is in gear engagement with the first gear (41), and the diameter of the second gear (42) is smaller than that of the first gear (41);
a third gear (43) which is designed coaxially with the second gear (42), the diameter of the third gear (43) being greater than the diameter of the second gear (42);
and the fourth gear (44) is fixedly installed at the output end of the speed increaser (4), and the diameter of the fourth gear (44) is smaller than that of the third gear (43).
5. An incubator dedicated to a magnetic resonance environment for use with the liquid-cooled ultrasonic motor of claim 4, comprising:
the ultrasonic motor comprises a box body (1), wherein an equipment end (11) is arranged on the side surface of the end part of the box body (1) in the horizontal direction, an ultrasonic motor body (3) is installed inside the equipment end (11), and an axial flow fan blade (5) is installed at the output end of a speed increaser (4);
the air conveying openings (81) are positioned on two sides of the bottom surface in the box body (1), and the air conveying openings (81) are communicated with the air supply opening (7);
the air return opening (10) is positioned on the surface of the end part of one side, close to the equipment end (11), in the box body (1) and is circularly communicated with the air supply opening (7);
and the heating system (9) is arranged between the axial flow fan blade (5) and the air return opening (10).
6. The incubator special for the magnetic resonance environment according to claim 5, wherein there are not less than two groups of the ultrasonic motor bodies (3), a collecting channel (71) is provided at the air supply outlet (7) of the ultrasonic motor body (3), a uniform flow island (72) is provided inside the collecting channel (71), an air supply channel (73) is provided in the conveying direction of the collecting channel (71), air outlets (731) are provided on both sides of the air supply channel (73), and the air outlets (731) are communicated with the air supply outlet (81) through an air transmission pipe (8).
7. The magnetic resonance environment-specific incubator of claim 6, wherein the heating system (9) comprises:
the radiator (92) is made of heat conducting materials and is arranged at the air outlet position of the air supply outlet (7), and the heat conducting materials of the radiator (92) are distributed in a 'mesh' shape;
a PTC ceramic heating element (91) connected to the heat conductive material in the heat sink (92).
8. A thermostatic system of an incubator for a magnetic resonance environment, which is applied to the incubator for a magnetic resonance environment of claim 7, comprises:
the temperature monitoring modules are arranged inside and outside the box body (1), and are in electric signal connection with the ultrasonic motor body (3);
the current divider is arranged in an output loop of the circuit of the ultrasonic motor body (3) and used for collecting the working current of the ultrasonic motor body (3), and the current divider is in electric signal connection with a controller of the ultrasonic motor body (3);
the temperature sensor I is arranged in a transformer winding of a driver of the ultrasonic motor body (3) and used for collecting the temperature in the transformer winding of the driver, and the temperature sensor I is in electric signal connection with a controller of the ultrasonic motor body (3);
the second temperature sensor is arranged in the ultrasonic motor body (3) and used for collecting the working temperature of the ultrasonic motor body (3), and the second temperature sensor is in electric signal connection with a controller of the ultrasonic motor body (3);
and the temperature setting module is used for setting the appropriate temperature inside the box body (1) and the maximum heating temperature of the heating system.
9. The incubator constant temperature system for magnetic resonance environment of claim 8, wherein the output end of the speed increaser (4) is provided with a speed measuring assembly (6), the speed measuring assembly (6) comprising:
the coded disc (61) is coaxially mounted with the axial flow fan blade (5), and a plurality of holes are carved on the surface of the coded disc (61);
and the photoelectric sensor (62) is arranged on the side surface of the coded disc (61) and corresponds to a hole on the surface of the coded disc (61).
10. The incubator constant temperature system special for the magnetic resonance environment as claimed in claim 9, wherein the box body (1), the liquid cooling chamber (2), the ultrasonic motor body (3), the speed measuring component (6) and the heating system (9) are made of non-magnetic materials, and the internal gear of the speed increaser (4) is made of non-metallic non-magnetic materials.
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| CN110677071A (en) * | 2019-11-18 | 2020-01-10 | 安徽理工大学 | Super magnetostrictive driver of pipe cavity integrated cooling system |
| CN114795757A (en) * | 2022-02-25 | 2022-07-29 | 江苏力磁医疗设备有限公司 | Infant incubator for magnetic resonance |
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2023
- 2023-02-13 CN CN202310106787.9A patent/CN115776249B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001012064A1 (en) * | 1999-08-13 | 2001-02-22 | Hughes, Clare, Louise | Infant apnoea monitor using piezo sensor based movement detection mat |
| CN102579047A (en) * | 2012-04-10 | 2012-07-18 | 江苏美时医疗技术有限公司 | Special magnetic resonance imaging device for baby |
| CN103888019A (en) * | 2013-07-18 | 2014-06-25 | 西安创联超声技术有限责任公司 | Self-adaptive ultrasonic motor based on temperature tracking |
| CN110677071A (en) * | 2019-11-18 | 2020-01-10 | 安徽理工大学 | Super magnetostrictive driver of pipe cavity integrated cooling system |
| CN114795757A (en) * | 2022-02-25 | 2022-07-29 | 江苏力磁医疗设备有限公司 | Infant incubator for magnetic resonance |
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Inventor after: Zong Renjie Inventor after: Li Mingqiang Inventor after: Bao Jian Inventor after: Zhang Huiyao Inventor after: Liu Qiang Inventor after: Pei Honghua Inventor after: Qi Xin Inventor after: Jin Shisheng Inventor after: Yang Yin Inventor before: Li Mingqiang Inventor before: Bao Jian Inventor before: Zhang Huiyao Inventor before: Liu Qiang Inventor before: Zong Renjie Inventor before: Pei Honghua Inventor before: Qi Xin Inventor before: Jin Shisheng Inventor before: Yang Yin |
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