CN110801338A - Water circulation cooling blanket and control method thereof - Google Patents
Water circulation cooling blanket and control method thereof Download PDFInfo
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- CN110801338A CN110801338A CN201911111635.8A CN201911111635A CN110801338A CN 110801338 A CN110801338 A CN 110801338A CN 201911111635 A CN201911111635 A CN 201911111635A CN 110801338 A CN110801338 A CN 110801338A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 204
- 238000001816 cooling Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 21
- 239000010410 layer Substances 0.000 claims abstract description 80
- 239000000498 cooling water Substances 0.000 claims abstract description 39
- 210000001015 abdomen Anatomy 0.000 claims abstract description 11
- 210000002216 heart Anatomy 0.000 claims abstract description 11
- 210000002640 perineum Anatomy 0.000 claims abstract description 11
- 239000011229 interlayer Substances 0.000 claims abstract description 10
- 238000005057 refrigeration Methods 0.000 claims description 77
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F7/0053—Cabins, rooms, chairs or units for treatment with a hot or cold circulating fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F7/0097—Blankets with active heating or cooling sources
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F2007/0054—Heating or cooling appliances for medical or therapeutic treatment of the human body with a closed fluid circuit, e.g. hot water
- A61F2007/0056—Heating or cooling appliances for medical or therapeutic treatment of the human body with a closed fluid circuit, e.g. hot water for cooling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F2007/0093—Heating or cooling appliances for medical or therapeutic treatment of the human body programmed
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F2007/0095—Heating or cooling appliances for medical or therapeutic treatment of the human body with a temperature indicator
Abstract
The invention provides a water circulation cooling blanket, which comprises: the blanket body and the thermal patch can be adhered to the inner layer of the blanket body and can protect the perineum, the abdomen and the heart of a patient; the cooling water tank is communicated with the water inlet and the water outlet of the water circulation pipeline and can form a water flow loop with the water circulation pipeline; the water circulation cooling blanket can be wrapped outside a patient body, the water circulation pipeline is arranged in the interlayer of the blanket body, cold water is pumped into the water circulation pipeline through the water circulation cooling blanket without manual intervention to realize physical cooling, the heat preservation patch can be attached to the inner layer of the blanket body, the perineum, the abdomen and the heart of the patient can be protected, and safe cooling is guaranteed.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a water circulation cooling blanket and a control method of the water circulation cooling blanket.
Background
An important part in the treatment of heatstroke patients or high-temperature heating patients is cooling, and the application of physical cooling needs to be enhanced besides the treatment of infusing 4-DEG C physiological saline, an ice blanket, an ice cap, CRRT and the like, the whole body is wiped by a wet towel in the conventional physical cooling, water is evaporated, and heat on the surface of the body is taken away, but the method needs nursing staff to wipe the patients continuously, time and labor are wasted, so that a cooling device is urgently needed, the cooling device can be wrapped on the patients, and the cooling is realized without manual intervention.
The invention application with the application number of 201720010997.8 discloses a medical sleeping bag capable of achieving physical cooling, wherein a waterproof interlayer is arranged in the sleeping bag, and cold water is pumped into the interlayer of the sleeping bag through a water circulation pipeline, but the design is equivalent to that the whole sleeping bag is designed into a large water bag, when a patient lies down, the sleeping bag is pressed at the bottom of the body, the flow of water is blocked, the cooling effect is influenced, the fully-wrapped sleeping bag comprises the whole body, and the physical cooling needs to avoid sensitive parts of the body to be cooled, such as perineum, abdomen and heart parts.
The invention application document with the application number of 201721815743.X discloses a medical cooling blanket, wherein a water pipe is arranged in an interlayer of a blanket body, so that the problem that the cooling blanket presses the bottom of a body to block the flow of water and influence the cooling effect is solved, but the problem that the cooling blanket needs to avoid sensitive parts of the body to be cooled is not solved, and the safety in the physical cooling process cannot be guaranteed.
Disclosure of Invention
The invention designs and develops a water circulation cooling blanket which can be wrapped outside a patient body, a water circulation pipeline is arranged in an interlayer of the blanket body, cold water is pumped into the water circulation pipeline through the water circulation cooling blanket, physical cooling is realized without manual intervention, and the water circulation cooling blanket is also provided with a heat-preservation patch which can be attached to the inner layer of the blanket body, so that the perineum, the abdomen and the heart of the patient can be protected, and the safe cooling is ensured.
The invention also provides a control method of the water circulation cooling water blanket, which controls the refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block and the power of the compressor refrigeration device through the neural network model to realize the temperature control of the circulating water in the cooling water tank, and accurately controls the temperature in the cooling water blanket by controlling the flow rate of the water pump to ensure the cooling effect of the cooling water blanket.
A water-circulating cooling blanket comprising:
a blanket body comprising:
the inner layer is positioned at the bottom layer of the blanket body and can be contacted with the skin of a human body;
a water-absorbing film layer disposed on top of the inner layer;
a thermal barrier layer disposed on top of the water-absorbing film layer;
the water circulation pipeline is a flexible water pipe, is uniformly distributed in the blanket body and is positioned in the interlayer between the water absorption film layer and the heat-resistant layer, and one end of the water circulation pipeline is provided with a water inlet while the other end is provided with a water outlet;
the warm-keeping patch can be adhered to the inner layer of the blanket body and can protect the perineum, the abdomen and the heart of a patient;
the cooling water tank is communicated with the water inlet and the water outlet of the water circulation pipeline and can form a water flow loop with the water circulation pipeline;
and the water pump is arranged in the cooling water tank and can pump the water in the cooling water tank into the water circulation pipeline.
Preferably, the blanket body can enclose into the bag body of both ends open-ended, the bag body can overlap and establish on patient's health, bag body both sides have removable opening, can make human arm or drainage tube pass.
Preferably, the inner layer is woven by one or more yarns containing components of Lycra fiber, cotton fabric fiber, nylon fiber, spandex fiber and corn fiber, the water absorption film layer is a plastic film, and the heat-resistant layer comprises a memory sponge layer.
Preferably, the cooling water tank includes:
one side of the water tank is provided with a water outlet, and the other side of the water tank is provided with a water return port;
the refrigeration coil is arranged at the bottom of the water tank;
a compressor refrigerating device which is arranged outside the water tank and is connected with two ends of the refrigerating coil pipe and a pipeline,
and the semiconductor refrigeration blocks are arranged on two sides of the water tank.
Preferably, a zipper is arranged at the detachable opening.
A control method of a water circulation cooling blanket comprises the following steps:
when the temperature T in the blanket bodytHigher than the standard temperature T of the blanket bodysAnd the body surface temperature T of the patientiHigher than standard human body temperature T0When the temperature is high, the refrigerating coil, the semiconductor refrigerating block and the water pump are started; meanwhile, the control is carried out based on the BP neural network, and the method comprises the following steps:
step one, acquiring the temperature T in the blanket body through a temperature sensor according to a sampling periodtAnd the body surface temperature T of the patientiTemperature in the cooling water tankDegree TxAnd detecting the water velocity v in the water circulation pipeline by a flow velocity sensori；
Step two, normalizing the parameters in sequence, and determining an input layer vector x ═ x of the three-layer BP neural network1,x2,x3,x4}; wherein x is1Is the temperature coefficient, x, in the blanket body2For the body surface temperature coefficient, x, of the patient3For lowering the humidity coefficient, x, in the water tank4Is the water flow velocity coefficient in the water circulation pipeline;
step three, the input layer vector is mapped to a middle layer, and the middle layer vector y is { y ═ y1,y2,…,ym}; m is the number of intermediate layer nodes;
step four, obtaining an output layer vector o ═ o1,o2,o3,o4}；o1Adjustment of the coefficient of the refrigeration temperature, o, for the refrigeration coil2Current regulation factor, o, for semiconductor refrigeration blocks3For regulating coefficient, o, of water pump rotation speed4Adjusting the coefficient for compressor chiller power;
controlling the refrigerating temperature of the refrigerating coil, the current of the semiconductor refrigerating block, the rotating speed of the water pump and the power of the compressor refrigerating device to ensure that
Wherein the content of the first and second substances,
and
output layer vector parameters, n, for the ith sampling periodc_max、nf_max、δa_maxAnd deltab_maxRespectively setting the maximum refrigeration temperature of the refrigeration coil, the maximum current of the semiconductor refrigeration block, the maximum rotating speed of the water pump and the maximum power of the compressor refrigeration device, nc(i+1)、nf(i+1)、δa(i+1)And deltab(i+1)The refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block, the water pump rotating speed and the compressor refrigeration device power in the (i + 1) th sampling period are respectively.
Preferably, in the third step, in the initial operation state, the refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block, the water pump rotation speed and the power of the compressor refrigeration device satisfy:
nc0＝0.70nc_max
nf0＝0.65nf_max
δa0＝0.83δa_pre
δb0＝0；
wherein n isc0、nf0、δa0And deltab0Respectively the refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block, the rotating speed of the water pump and the power of the compressor refrigeration device, nc_max、nf_maxThe maximum refrigerating temperature of the refrigerating coil and the maximum current delta of the semiconductor refrigerating blocka_preThe rotation speed is preset for the water pump.
Preferably, the compressor refrigeration device is preset with a power δa_preComprises the following steps:
in the formula, ξaThe value range of the correction coefficient is 0.45-0.55; t isiIs the body surface temperature, T, of the patient0Is the standard human body temperature; t issIs the standard temperature in the blanket body.
Preferably, the method further comprises the following steps:
when the temperature T in the blanket bodytHigher than the standard temperature T of the blanket bodysThe microcontroller controls the water pump to be started; when the temperature T in the blanket bodytStandard temperature T of carpet body of prisonsAnd the microcontroller controls the water pump to be closed.
Advantageous effects
The invention designs and develops a water circulation cooling blanket which can be wrapped outside a patient body, a water circulation pipeline is arranged in an interlayer of the blanket body, cold water is pumped into the water circulation pipeline through the water circulation cooling blanket, physical cooling is realized without manual intervention, and the water circulation cooling blanket is also provided with a heat-preservation patch which can be attached to the inner layer of the blanket body, so that the perineum, the abdomen and the heart of the patient can be protected, and the safe cooling is ensured.
The invention also provides a control method of the water circulation cooling water blanket, which controls the refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block and the power of the compressor refrigeration device through the neural network model to realize the temperature control of the circulating water in the cooling water tank, and accurately controls the temperature in the cooling water blanket by controlling the flow rate of the water pump to ensure the cooling effect of the cooling water blanket.
Drawings
Fig. 1 is a schematic structural view of a water circulation cooling blanket according to the present invention.
Fig. 2 is a schematic view of the structure of the blanket body of the present invention.
Fig. 3 is a schematic view of the shape of the enclosure of the blanket body according to the present invention.
Fig. 4 is a schematic structural view of a water tank according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1, the water circulation cooling blanket provided by the invention comprises: the blanket body 110, the water circulation pipeline 120, the thermal patch 130, the cooling water tank 140 and the water pump 150.
As shown in fig. 2, the blanket body 110 comprises an inner layer 111, a water-absorbing film layer 112, a water circulation pipeline 113 and a heat-resistant layer 114 from bottom to top, wherein the inner layer 111 is positioned at the bottom layer of the blanket body and can be contacted with the skin of a human body, and the water-absorbing film layer 112 is arranged at the top of the inner layer 111; the thermal barrier 114 is disposed on top of the water-absorbing film layer 112; the water circulation pipeline 113 is a flexible water pipe, is uniformly distributed in the blanket body 110, is positioned in the interlayer between the water absorption film layer 112 and the heat resistance layer 114, and has a water inlet at one end and a water outlet at the other end. The thermal patch 130 can be adhered to the inner layer of the blanket body 110, and can protect the perineum, abdomen and heart of the patient; the cooling water tank 140 is communicated with a water inlet and a water outlet of the water circulation pipeline 113 and can form a water flow loop with the water circulation pipeline 113; the water pump 150 is disposed in the cooling water tank 140, and is capable of pumping water in the cooling water tank 140 into the water circulation line 120.
As shown in fig. 3, the blanket body 110 can be enclosed into a bag with two open ends, the bag can be sleeved on the body of the patient, the head and the feet are exposed outside the bag, the two sides of the bag are provided with detachable openings 111a for the arms or the drainage tubes of the human body to pass through, the length of the bag enclosed by the blanket body is 130cm-150cm, the width is 70-90cm, and as a preferred option, the detachable openings are provided with zippers.
In another embodiment, the inner layer 111 is woven from one or more yarns comprising lycra fiber, cotton fiber, nylon fiber, spandex fiber and corn fiber, and the water-absorbing film layer 112 is a plastic film. The thermal barrier 114 includes a memory foam layer.
As shown in fig. 4, the cooling water tank 140 includes: the refrigeration system comprises a water tank 141, a refrigeration coil 142, a compressor refrigeration device 143 and a semiconductor refrigeration block 144, wherein one side of the water tank 141 is provided with a water outlet, and the other side of the water tank 141 is provided with a water return port; the refrigeration coil 142 is located at the bottom of the water tank 141; the compressor refrigerating device 143 is disposed outside the water tank 141, and is connected to both ends of the refrigerating coil 142 and pipes, and the semiconductor refrigerating blocks 144 are disposed at both sides of the water tank.
Preferably, a temperature sensor is arranged in the blanket body 110, when the temperature in the blanket body rises, the water pump can be started, cold water in the water tank can be pumped into the water circulation pipeline 113 from the water inlet of the water circulation pipeline through the water pump, hot water after heat exchange with a human body can return to the cooling water tank 140 through the water outlet for cooling, the cooling water tank 140 is always started to cool the water in the cooling water tank 140, the water pump 150 is started once at intervals for water circulation, effective cooling is realized, the number of the thermal patches 130 is multiple, the thermal patches 130 can be adhered to any position of the inner layer of the thermal patches 130, and the perineum, the abdomen and the heart of a patient can be protected. The thermal patch 130 is made of one or more thermal materials selected from down, silk and chemical fiber, and an adhesive button is fixed on one side of the thermal patch 130 and can be attached to the inner layer 111.
The invention designs and develops a water circulation cooling blanket which can be wrapped outside a patient body, a water circulation pipeline is arranged in an interlayer of the blanket body, cold water is pumped into the water circulation pipeline through a cooling water tank without manual intervention to realize physical cooling, and the water circulation cooling blanket is also provided with a heat-preservation patch which can be attached to the inner layer of the blanket body, so that the perineum, the abdomen and the heart of the patient can be protected, and the safe cooling is ensured.
The invention also provides a control method of the water circulation cooling blanket, which comprises the following steps:
step one, establishing a BP neural network model.
The BP network system structure adopted by the invention is composed of three layers, wherein the first layer is an input layer, n nodes are provided in total, n signals representing the working state of the equipment are correspondingly provided, and the signal parameters are provided by a data preprocessing module. The second layer is a hidden layer, and has m nodes, and is determined by the training process of the network in a self-adaptive mode. The third layer is an output layer, p nodes are provided in total, and the output is determined by the response actually needed by the system.
The mathematical model of the network is:
inputting a vector: x ═ x1,x2,...,xn)T
Intermediate layer vector: y ═ y1,y2,...,ym)T
Outputting a vector: o ═ o (o)1,o2,...,op)T
In the invention, the number of nodes of the input layer is n equal to 4, and the number of nodes of the output layer is p equal to 4. The number m of hidden layer nodes is estimated by the following formula:
according to the sampling period, the input 4 parameters are x1Is the temperature coefficient, x, in the blanket body2For the body surface temperature coefficient, x, of the patient3For lowering the humidity coefficient, x, in the water tank4Is the water flow velocity coefficient in the water circulation pipeline;
since the input data belong to different physical quantities, the dimensions are different. Therefore, the data needs to be normalized to a number between 0-1 before it is input into the artificial neural network.
Temperature T in blanket bodytAnd the body surface temperature T of the patientiTemperature T in cooling water tankxAnd detecting the water velocity v in the water circulation pipeline by a flow velocity sensori；
In particular, for the temperature T inside the blankettNormalized to obtain the temperature coefficient x in the blanket body1
Wherein, Tt_minAnd Tt_maxRespectively the lowest temperature and the highest temperature in the blanket body.
For the body surface temperature of the patientTiAfter normalization, obtaining the body surface temperature coefficient x of the patient2，
Wherein, Ti_minAnd Ti_maxRespectively the lowest value and the highest value of the temperature in the blanket body.
Temperature T in cooling water tankxAfter normalization, the temperature x in the water tank is obtained3；
Wherein, Tx_minAnd Tx_maxRespectively the lowest humidity and the highest humidity in the greenhouse.
For the velocity v of water flow in the water circulation lineiNormalized to obtain the water flow velocity coefficient x4；
Wherein v isi_minAnd vi_maxRespectively the minimum and maximum velocity of the water flow.
The 4 parameters of the output signal are respectively expressed as: o1Adjustment of the coefficient of the refrigeration temperature, o, for the refrigeration coil2Current regulation factor, o, for semiconductor refrigeration blocks3For regulating coefficient, o, of water pump rotation speed4Adjusting the coefficient for compressor chiller power;
refrigerating temperature regulating coefficient o of refrigerating coil1And represents the ratio of the refrigerating temperature of the refrigerating coil in the next sampling period to the highest number of the refrigerating temperatures of the refrigerating coils set in the current sampling period. Outputting the refrigeration temperature regulating coefficient of the refrigeration coil of the ith sampling period through a BP neural network
Then, the refrigeration coil in the (i + 1) th sampling period is controlledCooling temperature of nc(i+1)So that it satisfies:
current regulation coefficient o of semiconductor refrigerating block2The ratio of the electric flow rate of the semiconductor refrigeration block in the next sampling period to the maximum current of the semiconductor refrigeration block set in the current sampling period is shown. Current regulation coefficient of semiconductor refrigeration block outputting ith sampling period through BP neural network
Then, controlling the current n of the semiconductor refrigeration block in the (i + 1) th sampling periodf(i+1)So that it satisfies:
water pump rotation speed regulating coefficient o3And the ratio of the water pump rotating speed in the next sampling period to the maximum rotating speed of the water pump set in the current sampling period is shown. That is, in the ith sampling period, the rotating speed delta of the water pump is acquiredaiOutputting the water pump rotating speed regulating coefficient of the ith sampling period through a BP neural networkThen, the rotating speed delta of the water pump in the (i + 1) th sampling period is controlleda(i+1)So that it satisfies:
power regulating coefficient o of compressor refrigerating device4The ratio of the compressor refrigerating device power in the next sampling period to the maximum compressor refrigerating device power set in the current sampling period is shown. That is, in the ith sampling period, the power of the compressor refrigerating device is collected to be deltabiOutputting the power opening coefficient of the compressor refrigerating device of the ith sampling period through a BP neural network
After that, controlRefrigerating device power delta for producing i +1 th sampling period compressorb(i+1)So that it satisfies:
and step two, training the BP neural network.
After the BP neural network node model is established, the training of the BP neural network can be carried out. Obtaining a training sample according to historical experience data of the product, and giving a connection weight w between an input node i and a hidden layer node jijConnection weight w between hidden layer node j and output layer node kjkThreshold value theta of hidden layer node jjThreshold value theta of output layer node kk、wij、wjk、θj、θkAre all random numbers between-1 and 1.
Continuously correcting w in the training processijAnd wjkUntil the system error is less than or equal to the expected error, the training process of the neural network is completed.
As shown in table 1, a set of training samples is given, along with the values of the nodes in the training process.
TABLE 1 training Process node values
And step three, acquiring data operation parameters and inputting the data operation parameters into a neural network to obtain a regulation and control coefficient.
The trained artificial neural network is solidified in the chip, so that the hardware circuit has the functions of prediction and intelligent decision making, and intelligent hardware is formed. After the intelligent hardware is powered on and started, the initial refrigeration temperature of the refrigeration coil is controlled to be n, and the initial current of the semiconductor refrigeration block is controlled to be nf0＝0.65nf_maxThe initial rotation speed of the water pump is nc0＝0.70nc_maxδa0＝0.83δa_preIs compressedThe initial power of the refrigerating device is deltab00; wherein n isc_max、nf_maxRespectively the set highest refrigerating temperature of the refrigerating coil, the maximum current of the semiconductor refrigerating block, the maximum rotating speed of the water pump and deltaa_preThe preset power of the refrigerating device of the compressor.
At the same time, the temperature T in the blanket bodytAnd the body surface temperature T of the patientiTemperature T in cooling water tankxAnd detecting the water velocity v in the water circulation pipeline by a flow velocity sensoriNormalizing the parameters to obtain an initial input vector of the BP neural networkObtaining an initial output vector through operation of a BP neural network
Step four, obtaining an initial output vector
Then, the following are obtained:
Obtaining the temperature T in the blanket body in the ith sampling period through a sensortAnd the body surface temperature T of the patientiTemperature in the cooling water tankDegree TxAnd detecting the water velocity v in the water circulation pipeline by a flow velocity sensoriAn input vector x of the ith sampling period is obtained by normalizationi＝(x1 i,x2 i,x3 i,x4 i) Obtaining the output vector of the ith sampling period through the operation of a BP neural network
Then controlling the refrigeration temperature of the cold coil, the current of the semiconductor refrigeration block and the rotating speed of the water pump, wherein the power of the refrigeration device of the compressor is respectively as follows:
through the arrangement, the refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block, the rotating speed of the water pump and the power of the refrigeration device of the compressor are respectively equal, so that the circulating cooling water blanket reaches the optimal operation state, and the cooling effect is improved.
In another embodiment, the compressor refrigeration unit is preset with a power δa_preComprises the following steps:
in the formula, ξaThe value range of the correction coefficient is 0.45-0.55; t isiIs the body surface temperature, T, of the patient0Is the standard human body temperature; t issIs the standard temperature in the blanket body.
Felt blanketInternal temperature TtHigher than the standard temperature T of the blanket bodysThe microcontroller controls the water pump to be started; when the temperature T in the blanket bodytStandard temperature T of carpet body of prisonsAnd the microcontroller controls the water pump to be closed.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. A water circulation cooling blanket is characterized by comprising:
a blanket body comprising:
the inner layer is positioned at the bottom layer of the blanket body and can be contacted with the skin of a human body;
a water-absorbing film layer disposed on top of the inner layer;
a thermal barrier layer disposed on top of the water-absorbing film layer;
the water circulation pipeline is a flexible water pipe, is uniformly distributed in the blanket body and is positioned in the interlayer between the water absorption film layer and the heat-resistant layer, and one end of the water circulation pipeline is provided with a water inlet while the other end is provided with a water outlet;
the warm-keeping patch can be adhered to the inner layer of the blanket body and can protect the perineum, the abdomen and the heart of a patient;
the cooling water tank is communicated with the water inlet and the water outlet of the water circulation pipeline and can form a water flow loop with the water circulation pipeline;
and the water pump is arranged in the cooling water tank and can pump the water in the cooling water tank into the water circulation pipeline.
2. The water circulation cooling blanket as claimed in claim 1, wherein the blanket body can be enclosed into a bag body with two open ends, the bag body can be sleeved on the body of the patient, and the two sides of the bag body are provided with detachable openings for the arm or the drainage tube of the patient to pass through.
3. The water circulation cooling blanket as claimed in claim 2, wherein the inner layer is woven by one or more yarns containing the components of Lycra fiber, cotton fabric fiber, nylon fiber, spandex fiber and corn fiber, the water absorbing film layer is a plastic film, and the heat resistant layer comprises a memory sponge layer.
4. The water circulating cooling blanket of claim 1, wherein the cooling water tank comprises:
one side of the water tank is provided with a water outlet, and the other side of the water tank is provided with a water return port;
the refrigeration coil is arranged at the bottom of the water tank;
a compressor refrigerating device which is arranged outside the water tank and is connected with two ends of the refrigerating coil pipe and a pipeline,
and the semiconductor refrigeration blocks are arranged on two sides of the water tank.
5. The blanket of claim 2, wherein a zipper is provided at the detachable opening.
6. A control method of a water circulation cooling blanket is characterized by comprising the following steps:
when the temperature T in the blanket bodytHigher than the standard temperature T of the blanket bodysAnd the body surface temperature T of the patientiHigher than standard human body temperature T0When the temperature is high, the refrigerating coil, the semiconductor refrigerating block and the water pump are started; meanwhile, the control is carried out based on the BP neural network, and the method comprises the following steps:
step one, acquiring the temperature T in the blanket body through a temperature sensor according to a sampling periodtAnd the body surface temperature T of the patientiTemperature T in cooling water tankxAnd detecting the water velocity v in the water circulation pipeline by a flow velocity sensori；
Step two, normalizing the parameters in sequence to determine three-layer BP nervesInput layer vector x ═ { x for network1,x2,x3,x4}; wherein x is1Is the temperature coefficient, x, in the blanket body2For the body surface temperature coefficient, x, of the patient3For lowering the humidity coefficient, x, in the water tank4Is the water flow velocity coefficient in the water circulation pipeline;
step three, the input layer vector is mapped to a middle layer, and the middle layer vector y is { y ═ y1,y2,…,ym}; m is the number of intermediate layer nodes;
step four, obtaining an output layer vector o ═ o1,o2,o3,o4}；o1Adjustment of the coefficient of the refrigeration temperature, o, for the refrigeration coil2Current regulation factor, o, for semiconductor refrigeration blocks3For regulating coefficient, o, of water pump rotation speed4Adjusting the coefficient for compressor chiller power;
controlling the refrigerating temperature of the refrigerating coil, the current of the semiconductor refrigerating block, the rotating speed of the water pump and the power of the compressor refrigerating device,
wherein the content of the first and second substances,
and
respectively the ith samplingPeriodic output layer vector parameter, nc_max、nf_max、δa_maxAnd deltab_maxRespectively setting the maximum refrigeration temperature of the refrigeration coil, the maximum current of the semiconductor refrigeration block, the maximum rotating speed of the water pump and the maximum power of the compressor refrigeration device, nc(i+1)、nf(i+1)、δa(i+1)And deltab(i+1)The refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block, the water pump rotating speed and the compressor refrigeration device power in the (i + 1) th sampling period are respectively.
7. The method for controlling the water circulation cooling blanket as claimed in claim 6, wherein in the third step, the cooling temperature of the cooling coil, the current of the semiconductor cooling block, the water pump rotation speed and the compressor cooling device power satisfy the following conditions in the initial operation state:
nc0＝0.70nc_max
nf0＝0.65nf_max
δa0＝0.83δa_pre
δb0＝0；
wherein n isc0、nf0、δa0And deltab0Respectively the refrigeration temperature of the refrigeration coil, the current of the semiconductor refrigeration block, the rotating speed of the water pump and the power of the compressor refrigeration device, nc_max、nf_maxThe maximum refrigerating temperature of the refrigerating coil and the maximum current delta of the semiconductor refrigerating blocka_preThe rotation speed is preset for the water pump.
8. The method for controlling a water-circulating cooling blanket as claimed in claim 7, wherein the compressor cooling device preset power δa_preComprises the following steps:
in the formula, ξaThe value range of the correction coefficient is 0.45-0.55; t isiThe temperature of the body surface of the patient,T0is the standard human body temperature; t issIs the standard temperature in the blanket body.
9. The method for controlling a water circulation cooling blanket according to claim 8, further comprising:
when the temperature T in the blanket bodytHigher than the standard temperature T of the blanket bodysThe microcontroller controls the water pump to be started; when the temperature T in the blanket bodytStandard temperature T of carpet body of prisonsAnd the microcontroller controls the water pump to be closed.
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