Multi-cavity water pillow with active partition alternate pressure reduction function

Abstract

The invention relates to the technical field of nursing appliances, discloses a multi-cavity water pillow with an active partition alternate pressure reduction function, and solves the problem that an existing static water pillow cannot realize periodic pressure relief. Comprising a water pillow main body, a driving control assembly, a fluid shunting assembly and a pressure monitoring assembly, at least two groups of pressure-bearing cavity groups which are in mutual fluid isolation and are arranged in a staggered manner are arranged in the water pillow main body, and the same group of cavities are in mutual fluid communication; the fluid distribution assembly realizes independent liquid filling, pressure maintaining and pressure relief path control of each cavity group, the pressure monitoring assembly acquires pressure data of each cavity in real time, and the driving control assembly controls different cavity groups to alternately fill liquid for pressurization and discharge liquid for pressure relief according to a preset time sequence or real-time pressure data, so that periodic pressure transfer and unloading of a pressed part are realized; the pressure sore prevention effect is excellent, the fitting degree is good, the control precision is high, the safety performance is outstanding, and the nursing requirements of medical clinical and household disabled patients are met.

Description

Technical Field

[0001] This invention relates to the field of nursing equipment technology, and in particular to a multi-chamber water pillow with active zone alternating decompression. Background Technology

[0002] Pressure injuries (commonly known as pressure ulcers) are one of the most common complications in bedridden, comatose, and spinal cord injury-related paralysis patients. The core cause is prolonged, continuous static pressure on local tissues, leading to impaired capillary blood circulation, tissue hypoxia and ischemia, and ultimately necrosis and ulceration. Clinical data shows that pressure ulcers on the occipital region, occipital protuberance, and auricle account for 12%-20% of all pressure ulcers in bedridden patients. This is especially true for patients who are completely unable to move or turn over independently, as effective pressure relief methods are lacking in these areas, and routine nursing care is extremely ineffective in preventing pressure ulcers.

[0003] Currently, the mainstream products for the prevention of head and neck pressure ulcers in clinical practice fall into two categories: The first category is traditional static water pillows and gel pads. These products rely solely on the fluidity of the fluid to passively disperse local pressure, which cannot change the core problem of "the bony prominences continuously bearing static pressure". For completely disabled patients, the pressure points are always above the critical pressure of capillary closure, and periodic pressure relief cannot be achieved. The effect of pressure ulcer prevention is very limited, and they can only be used for patients with mild independent mobility. The second type is the full-body alternating air-filled pressure-reducing mattress. While this type of product can achieve periodic pressure relief, it lacks a dedicated design to adapt to the physiological curves of the head and neck. The arrangement of chambers in the head and neck area is unreasonable and cannot accurately match the physiological structures of the occipital bone, auricle, and cervical spine, easily leading to abnormal stress on the cervical spine. Therefore, this paper proposes the development of an active, zoned, alternating pressure-reducing multi-chamber water pillow. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide an active, partitioned, alternating decompression multi-chamber water pillow, which solves the core problem that traditional static water pillows cannot achieve periodic pressure unloading, and eliminates the continuous static pressure on the bony prominences of the head and neck from the root.

[0005] This invention is achieved using the following technical solution: an active partitioned alternating decompression multi-cavity water pillow, comprising a water pillow body, a drive control assembly, a fluid diversion assembly, and a pressure monitoring assembly; The water pillow body is provided with two sets of independent and completely fluid-isolated pressure chambers, group A and group B. The fluid distribution assembly is in fluid communication with the pressure chamber A group, the pressure chamber B group, and the drive control assembly, respectively, and is used to independently control the filling, pressure holding, and pressure relief fluid paths of the pressure chamber A group and the pressure chamber B group; The pressure monitoring assembly is set up one-to-one with the pressure chamber A group and the pressure chamber B group. Its probe extends into the inner cavity of the corresponding pressure chamber to collect the internal liquid pressure data of each pressure chamber in real time and transmit the pressure data to the drive control assembly in real time. The drive control assembly is electrically connected to the fluid distribution assembly and the pressure monitoring assembly, respectively. It can perform closed-loop control based on preset timing control logic and combined with the pressure data collected in real time by the pressure monitoring assembly, so as to realize the alternating filling and pressurization and drainage of different pressure chamber groups, and complete the periodic pressure transfer and unloading of the pressure-bearing parts of the human body.

[0006] As a further improvement to the above scheme, both the pressure chamber group A and the pressure chamber group B contain multiple independent pressure chambers, and the pressure chambers of the pressure chamber group A and the pressure chamber group B are arranged in an alternating manner, so that adjacent pressure chambers belong to different chamber groups.

[0007] As a further improvement to the above solution, the pressure monitoring assembly includes multiple sets of connecting pressure measuring components, each set of connecting pressure measuring components including a tee connector, a quick-release pipe connector and a pressure sensor; The tee connector is integrally formed with the rear end interface of each pressure chamber in the corresponding pressure chamber group A and pressure chamber group B. The first port of the tee connector is connected to the inner cavity of pressure chamber group A and pressure chamber group B, the second port is sealed to the diversion pipe of the fluid diversion assembly through a quick-release pipe connector, and the third port is sealed to the pressure sensor. The probe of the pressure sensor extends into the interior of pressure chamber group A and pressure chamber group B through the inner cavity of the tee connector, and its signal output terminal is electrically connected to the drive control assembly.

[0008] As a further improvement to the above solution, the drive control assembly includes an equipment bracket, a liquid storage bag, a water delivery pump group, a water extraction pump group, and a PLC controller. The equipment support is located behind the water pillow body; the liquid storage bag is placed inside the rear side of the equipment support for storing the working medium; the delivery pump group and the extraction pump group are symmetrically installed on both sides of the equipment support; the PLC controller is detachably installed on the front side of the equipment support, and its control output terminal is electrically connected to the controlled terminal of the delivery pump group, the extraction pump group, and the fluid diversion assembly, respectively, and its data input terminal is electrically connected to the signal output terminal of the pressure monitoring assembly.

[0009] As a further improvement to the above solution, the equipment support includes a support body, a support platform, a guide support, a water pump clamp, and a U-shaped support. The support platform is integrally set on the lower front side of the bracket body. The top of the support platform is equipped with two L-shaped clamping plates with waist-shaped adjustment holes for clamping and fixing the PLC controller. The guide bracket is horizontally fixed to the middle of the front side of the bracket body. The guide bracket has multiple cable slots for securing and fixing the connecting wires. The pump clamps are symmetrically arranged on both sides of the support body, and the pump clamps are provided with U-shaped slots for pump mounting. Two U-shaped brackets are symmetrically arranged on the top front side of the bracket body. The bottom plate of the U-shaped bracket has a limiting groove. A clamping slider is slidably installed in the inner cavity of the U-shaped bracket. A clamping spring is provided between the rear side of the clamping slider and the rear upright plate of the U-shaped bracket. The clamping spring pushes the clamping slider to clamp and fix the fluid distribution assembly.

[0010] As a further improvement to the above solution, the fluid splitting assembly includes a splitting element, a splitting pipe assembly, and a solenoid valve control unit; The diversion component is fixedly installed on the top front side of the equipment bracket of the drive control assembly. Inside it are two diversion chambers, A and B, which correspond to the pressure chamber A and pressure chamber B, are independent of each other, and are completely fluid-isolated. The shunt tube assembly includes multiple flexible medical shunt tubes; the side walls of both the A-group shunt chamber and the B-group shunt chamber are provided with two quick-connect interfaces; the two quick-connect interfaces are a filling interface and a pressure relief interface, respectively. The filling interface is connected to the delivery pump group of the drive control assembly, and the pressure relief interface is connected to the extraction pump group of the drive control assembly. Each solenoid valve in the solenoid valve control unit is connected in series in each filling pipeline and pressure relief pipeline, and its controlled end is electrically connected to the PLC controller of the drive control assembly.

[0011] As a further improvement to the above scheme, multiple quick-release pipe joints are provided on the front side of both the A-component flow chamber and the B-component flow chamber; the two ends of the flow divider are respectively sealed and connected to the quick-release pipe joints and the corresponding interfaces of the pressure monitoring assembly; the A-component flow chamber is in fluid communication with the pressure chamber A group; and the B-component flow chamber is in fluid communication with the pressure chamber B group.

[0012] As a further improvement to the above solution, the delivery pump group includes two sets of delivery pumps, which are respectively installed on the pump mounting plates near the front on both sides. The extraction pump group includes two sets of extraction pumps, which are respectively installed on the pump mounting plates near the rear on both sides. The filling port of the A-group flow chamber is connected to the output end of the left delivery pump, and the pressure relief port is connected to the input end of the left extraction pump. The filling port of the B-group flow chamber is connected to the output end of the right delivery pump, and the pressure relief port is connected to the input end of the right extraction pump. The input ends of all delivery pumps and the output ends of all extraction pumps are connected to the inner cavity of the storage bag, and the output ends of the delivery pumps and the input ends of the extraction pumps are all connected in series with a one-way valve to prevent backflow of the medium.

[0013] As a further improvement to the above solution, the solenoid valve control unit includes a group of A-type filling solenoid valves, a group of A-type pressure relief solenoid valves, a group of B-type filling solenoid valves, and a group of B-type pressure relief solenoid valves. The A-group filling solenoid valve is connected in series in the filling pipeline of the A-group flow chamber, the A-group pressure relief solenoid valve is connected in series in the pressure relief pipeline of the A-group flow chamber, the B-group filling solenoid valve is connected in series in the filling pipeline of the B-group flow chamber, and the B-group pressure relief solenoid valve is connected in series in the pressure relief pipeline of the B-group flow chamber; all solenoid valves are normally closed solenoid valves, and their on / off states are independently controlled by the PLC controller to achieve independent control of the filling, pressure holding, and pressure relief paths of the corresponding pressure chamber groups.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention employs a staggered arrangement of two independent pressure-bearing chambers. A PLC controller manages the periodic alternating filling and depressurization of the two chambers, ensuring that the pressure points on the bony prominences of the head and neck complete a full transfer within each preset cycle. This fundamentally avoids continuous static pressure on local tissues, achieving periodic pressure relief at the pressure points. It changes the static nature of traditional water pillows, providing essential and automated pressure point transfer functions for fully immobilized patients. For disabled patients who are completely unable to move independently, its pressure ulcer prevention effect is far superior to traditional static water pillows, filling the technological gap in dedicated active decompression water pillows for the head and neck. This invention uses pressure sensors that correspond one-to-one with the chambers to collect pressure data in real time. The PLC controller enables closed-loop precise control, which can accurately control the pressure within the clinically safe range, avoiding excessive pressure that could cause local tissue compression or insufficient pressure that could cause insufficient support. At the same time, it has multiple safety structures built in, including overpressure protection, underpressure alarm, backflow prevention, and leakage prevention, which fully comply with the safety specifications of medical care products. This invention employs a quick-release connector structure to achieve rapid connection and disassembly of the water pillow body and the diversion assembly. The water pillow body is a disposable or reusable disinfectable structure, which can be disassembled, replaced, and disinfected separately, meeting the infection control requirements of medical settings. The equipment bracket integrates all drive, control, and fluid components, with a compact layout and small footprint, and can be directly fixed to the head of the hospital bed, adapting to the installation needs of various hospital beds and nursing beds. At the same time, the snap-fit ​​water pump, PLC controller, and diversion component fixing structure significantly reduces the difficulty of disassembly and maintenance of the equipment, facilitating clinical operation and maintenance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional perspective view of the present invention from the frontal view. Figure 2 This is a three-dimensional stereoscopic view of the invention from the rear view direction; Figure 3 This is a three-dimensional perspective view of the main body of the water pillow of the present invention from the frontal view. Figure 4 This is a three-dimensional perspective view of the water pillow body of the present invention from the rear view direction; Figure 5 This is a three-dimensional perspective view of the device bracket of the present invention from the front view. Figure 6 A three-dimensional perspective view of the device bracket of the present invention with the diverter and diverter removed from the front view; Figure 7 This is a three-dimensional perspective view of the device support of the present invention after removing the diversion component, diversion pipe and liquid storage bag; Figure 8 This is a three-dimensional representation of the flow divider of the present invention.

[0016] Explanation of key symbols: 1. Water pillow body; 11. Pressure chamber A group; 12. Pressure chamber B group; 2. Equipment bracket; 21. Bracket body; 22. Support platform; 23. L-shaped clamping plate; 24. Guide bracket; 25. Water pump clamping plate; 26. U-shaped bracket; 27. Limiting groove; 28. Pressing slider; 29. ​​Pressing spring; 3. Connecting pressure measuring component; 31. T-joint; 32. Quick-release pipe joint one; 33. Pressure sensor; 4. Diverter; 41. A group diverter chamber; 42. B group diverter chamber; 43. Quick-release pipe joint two; 44. Quick-connect interface; 5. Diverter pipe; 6. Liquid storage bag; 7. Delivery pump; 8. Extraction pump; 9. PLC controller. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0018] Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0019] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0020] To keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted.

[0021] Traditional static water pillows / gel pads rely solely on the passive dispersion of pressure by the fluid. For patients completely unable to move independently, bony prominences still bear continuous static pressure, failing to achieve periodic pressure relief and thus offering limited preventative benefits. Please combine with... Figure 1-8 As shown in the figure, the active partitioned alternating decompression multi-chamber water pillow provided by the present invention includes four core modules: water pillow body 1, drive control assembly, fluid diversion assembly, and pressure monitoring assembly. Each module adopts a modular design, which can be quickly disassembled and maintained, and is fully adapted to the needs of medical and clinical use. like Figure 2 , Figure 3 As shown, the main body 1 of the water pillow is made of medical-grade TPU material through one-piece hot pressing. The material thickness is 0.5mm, the Shore hardness is 40HA, the biocompatibility meets the GB / T16886 medical device biological evaluation standard, it can withstand high temperature sterilization, and is non-toxic and non-irritating to the skin. The interior of the water pillow body 1 is divided into two completely independent, fluid-isolated pressure chamber groups by a heat-sealed dividing line: pressure chamber group A 11 and pressure chamber group B 12. Each pressure chamber group A 11 and pressure chamber group B 12 contains multiple (no fewer than three) pressure chambers arranged at equal intervals. The two groups of pressure chambers are staggered, with adjacent pressure chambers belonging to different chamber groups, ensuring that all pressure points on the patient's head and neck can achieve complete pressure transfer during pressure filling and depressurization. Each pressure chamber has an integrated fluid interface at its rear end for connection to the pressure monitoring assembly. like Figure 3 , Figure 4 As shown, the pressure monitoring assembly includes a pressure measuring component 3, which is set one-to-one with the pressure chamber. Each pressure measuring component 3 includes a tee connector 31, a quick-release pipe connector 32, and a pressure sensor 33. The tee connector 31 is injection molded from medical-grade PC material. Its first port is integrally heat-sealed with the rear interface of the corresponding pressure chamber, without any adhesive gaps, avoiding the risk of leakage at the interface and ensuring the sealing performance of the connection. The second port of the tee connector 31 is sealed to the internal thread of the quick-release tube connector 32 through the external thread. The quick-release tube connector 32 adopts a medical-grade Luer locking connector, which is interference-fitted to one end of the diverter tube 5 and fixed by a locking ring to ensure no leakage during fluid transportation. The third port of the tee connector 31 is sealed to the external thread of the pressure sensor 33 through the internal thread. A medical-grade silicone O-ring is provided at the connection to ensure sealing performance. The pressure sensor 33 is a medical-grade diffused silicon pressure sensor with a measurement range of 0-50 mmHg and a measurement accuracy of ±0.5 mmHg. Its probe passes through the inner cavity of the tee connector 31 and extends into the interior of the pressure chamber, which can directly collect the liquid pressure data in the chamber, avoiding measurement errors caused by pipeline pressure loss. The signal output terminal of the pressure sensor 33 is electrically connected to the signal input terminal of the PLC controller 9 through a shielded wire, which can transmit the collected pressure data to the PLC controller 9 in real time, providing data support for closed-loop control. like Figure 5-7 As shown, the equipment bracket 2 is the main support for the drive control assembly and the fluid distribution assembly. It is made of medical-grade ABS material and is integrally injection molded. The overall structure is compact and can be directly fixed to the guardrail or bed board of the hospital bed head, occupying little space. The equipment bracket 2 includes a bracket body 21, a support platform 22, a guide bracket 24, a water pump clamp 25, and a U-shaped bracket 26. The support platform 22 is integrally set on the lower front side of the bracket body 21. It is a horizontal platform structure used to support the PLC controller 9. The top of the support platform 22 has two sets of bolt holes, and two L-shaped clamping plates 23 are symmetrically fixed by bolts. The bottom plate of the L-shaped clamping plate 23 has waist-shaped adjustment holes, which can be used to adjust the distance between the two L-shaped clamping plates 23 to adapt to PLC controllers 9 of different sizes. The vertical side plates of the L-shaped clamping plates 23 abut against the two side walls of the PLC controller 9 to realize the quick clamping, fixing and disassembly of the PLC controller 9. The guide bracket 24 is horizontally fixed to the front middle of the bracket body 21 by bolts, located above the support platform 22. The guide bracket 24 has multiple U-shaped cable slots arranged side by side, which are used to fix the shielded wires between the PLC controller 9 and the pressure sensor 33 and each solenoid valve, to avoid the wires from being messy and tangled, and to prevent the wires from being pulled and causing the connection to loosen, thereby improving the stability of the equipment operation. The main body of the bracket 21 has two water pump clamping plates 25 with U-shaped slots symmetrically integrated on the left and right sides. The size of the U-shaped slots matches the pump body size of the conveying water pump and the extracting water pump, which can realize the quick clamping and fixing of the water pump without the need for additional bolts, and is convenient for disassembly and maintenance. The rear side of the bracket body 21 has a liquid storage bag receiving cavity, and the liquid storage bag 6 can be detached and placed in the receiving cavity. U-shaped brackets 26 are symmetrically fixed to the front top of the bracket body 21 by bolts. The openings of the two U-shaped brackets 26 are arranged opposite each other. The bottom plate of the U-shaped brackets 26 has a limiting groove 27 in the front-back direction. A pressing slider 28 is slidably installed in the inner cavity of the U-shaped brackets 26. The bottom of the pressing slider 28 is integrally provided with a limiting slider that matches the limiting groove 27. The limiting slider passes through the inner cavity of the limiting groove 27 to realize the sliding guide of the pressing slider 28 and prevent the slider from deviating to the left or right. A pressing spring 29 is provided between the rear side of the pressing slider 28 and the rear upright plate of the U-shaped bracket 26. The spring force of the pressing spring 29 pushes the pressing slider 28 to slide forward along the limiting groove 27, so that the two pressing sliders 28 abut against the left and right side walls of the diverter 4 respectively, realizing the quick clamping and fixing of the diverter 4 without bolt fixing, which is convenient for disassembly and assembly, and can be adapted to diverters 4 of different lengths. like Figure 8 As shown, the fluid splitting assembly includes a splitting component 4, a splitting pipe group, and a solenoid valve control unit. Its core function is to realize the independent filling and depressurization path control of the two groups of pressure-bearing chambers, and it is the core structure to realize the alternating depressurization function. The shunt component 4 is integrally injection molded from medical-grade PVC material, with an overall rectangular structure. Internally, it is divided by a sealed partition into two independent, completely fluid-isolated shunt chambers: shunt chamber A 41 and shunt chamber B 42. Shunt chamber A 41 corresponds to pressure chamber A group 11, and shunt chamber B 42 corresponds to pressure chamber B group 12. Four quick-release pipe connectors 43 are integrally installed on the front side of shunt chamber A 41, and on the front side of shunt chamber B 42... The body is equipped with four quick-release tube connectors 43, which also adopt medical Luer locking connectors. The shunt tube group includes eight medical-grade PVC flexible shunt tubes 5. One end of the shunt tube 5 is sealed and locked to the quick-release tube connector 43, and the other end is sealed and locked to the quick-release tube connector 32 on the corresponding pressure chamber, so as to realize the fluid communication between the A group shunt chamber 41 and the pressure chamber A group 11, and the B group shunt chamber 42 and all pressure chambers B group 12. The right side wall of the A-component flow chamber 41 is provided with two quick-connect interfaces 44, namely a filling interface and a pressure relief interface; the right side wall of the B-component flow chamber 42 is also provided with two quick-connect interfaces 44, namely a filling interface and a pressure relief interface; the filling interface of the A-component flow chamber 41 is connected to the output end of the left-side delivery pump 7 through a hose, and the pressure relief interface is connected to the input end of the left-side extraction pump 8 through a hose; the filling interface of the B-component flow chamber 42 is connected to the output end of the right-side delivery pump 7 through a hose, and the pressure relief interface is connected to the input end of the right-side extraction pump 8 through a hose. The solenoid valve control unit includes a group A of filling solenoid valves, a group A of pressure relief solenoid valves, a group B of filling solenoid valves, and a group B of pressure relief solenoid valves. The group A of filling solenoid valves is connected in series on the filling pipeline between the left-side delivery pump 7 and the group A flow chamber 41, and the group A of pressure relief solenoid valves is connected in series on the pressure relief pipeline between the left-side extraction pump 8 and the group A flow chamber 41. The group B of filling solenoid valves is connected in series on the filling pipeline between the right-side delivery pump 7 and the group B flow chamber 42, and the group B of pressure relief solenoid valves is connected in series on the pressure relief pipeline between the right-side extraction pump 8 and the group B flow chamber 42. All solenoid valves are medical-grade miniature normally closed solenoid valves, and their controlled ends are electrically connected to the control output of the PLC controller 9 via wires. The PLC controller 9 independently controls the on / off state of each solenoid valve, thereby achieving independent control of the filling, pressure holding, and pressure relief paths of the two groups of chambers.

[0022] like Figure 1 , Figure 5 As shown, the drive control assembly includes an equipment bracket 2, a liquid storage bag 6, a water delivery pump group, a water extraction pump group, and a PLC controller 9.

[0023] The liquid storage bag 6 is made of transparent medical-grade PVC material with a rated capacity of 2L. It has a filling port and a vent at the top, with a sealing cap for easy replenishment of the working medium. An internal capacitive liquid level sensor is installed in the liquid storage bag 6. The sensor's signal output is electrically connected to the signal input of the PLC controller 9, allowing real-time monitoring of the liquid level. When the liquid level falls below a preset lower limit, the PLC controller 9 triggers an audible and visual alarm for low liquid level and simultaneously stops the water pump to prevent dry running and damage. A medical precision filter with a filtration accuracy of 50μm is connected in series at the outlet of the liquid storage bag 6, which filters impurities in the working medium, preventing them from entering the water pump, solenoid valve, and chamber, thus avoiding pipe blockage or component damage. The delivery pump set includes two delivery pumps 7, and the extraction pump set includes two extraction pumps 8. All pumps are medical-grade miniature diaphragm pumps with a rated voltage of 24V (safe voltage), noise level below 35dB, brushless motor drive, and long service life. One set of delivery pumps 7 and extraction pumps 8 are fixedly mounted on the left pump mounting plate 25 of the support body 21, and the other set of delivery pumps 7 and extraction pumps 8 are fixedly mounted on the right pump mounting plate 25 of the support body 21. The input end of the left-side delivery pump 7 is connected to the inner cavity of the storage bag 6 via a hose, and the output end is connected to the filling port of the A-component flow chamber 41 via a hose. The input end of the right-side delivery pump 7 is connected to the inner cavity of the storage bag 6 via a hose, and the output end is connected to the filling port of the B-component flow chamber 42 via a hose. The input end of the left-side extraction pump 8 is connected to the pressure relief port of the A-component flow chamber 41 via a hose, and the output end is connected to the inner cavity of the storage bag 6 via a hose. The input end of the right-side extraction pump 8 is connected to the pressure relief port of the B-component flow chamber 42 via a hose, and the output end is connected to the inner cavity of the storage bag 6 via a hose. All delivery pumps and extraction pumps are connected in series with medical check valves at their output ends and input ends. The direction of the check valves is consistent with the direction of fluid delivery, which can effectively prevent backflow of the working medium, avoid abnormal fluctuations in chamber pressure, and improve the stability of equipment operation. PLC controller 9 adopts a medical-grade programmable logic controller, with a built-in touch screen and audible and visual alarm. It is detachably clamped and fixed on the support platform 22. Its control output terminals are electrically connected to the controlled terminals of the left-side delivery water pump 7, right-side delivery water pump 7, left-side extraction water pump 8, right-side extraction water pump 8, and each solenoid valve. Its data input terminals are electrically connected to the signal output terminals of all pressure sensors 33 and level sensors. PLC controller 9 has built-in timer cycle control module, pressure closed-loop control module, and abnormal protection module. The specific control logic is as follows: The timed cycle control module has a preset alternation cycle of 10 minutes (which can be freely adjusted within the range of 5-15 minutes) and is used to control the automatic switching of the pressure charging and depressurization sequence of the two pressure chamber groups. Pressure closed-loop control module: The preset upper limit of filling pressure is 20 mmHg (adjustable within the range of 5-30 mmHg), the pressure holding threshold is 18-22 mmHg, and the lower limit of pressure relief is 2 mmHg. Based on the pressure data fed back in real time by pressure sensor 33, it can automatically control the start and stop of water pump and solenoid valve. When the chamber pressure reaches the upper limit of filling, the corresponding delivery water pump and filling solenoid valve are automatically shut off, and the pressure holding state is entered. When the pressure is lower than the lower limit of pressure holding during the pressure holding process, the delivery water pump is automatically started to replenish the pressure and ensure the stability of the support pressure. When the pressure drops to the lower limit of pressure relief during the pressure relief process, the corresponding extraction water pump and pressure relief solenoid valve are automatically shut off. Abnormal protection module: Built-in overpressure protection, underpressure alarm, low liquid level alarm, and water pump dry run protection logic. When the chamber pressure exceeds the 30mmHg overpressure threshold, the corresponding pressure relief solenoid valve and the extraction water pump will be automatically opened to relieve pressure, and an audible and visual alarm will be triggered at the same time. When the liquid level in the storage bag is too low, all water pumps will be automatically stopped, and an audible and visual alarm will be triggered. When the water pump operating current is abnormal, the machine will automatically shut down for protection, eliminating potential safety hazards in equipment operation.

[0024] Working principle and process of the present invention In this embodiment, the working medium is medical antibacterial purified water. Before use, the working medium is added through the filling port of the storage bag 6, and the air in the pipeline and chamber is purged. The water pillow body 1 is placed at the head of the hospital bed, with the patient's head and neck resting on the arc-shaped contact surface of the water pillow body 1. The working parameters, including the alternation cycle, the upper limit of the filling pressure, and the pressure holding threshold, are set through the touch screen of the PLC controller 9. After starting the equipment, the equipment automatically enters the alternating decompression working mode. The specific working process is as follows: First working cycle (0-10 minutes): PLC controller 9 sends control commands to open the left-side delivery water pump 7 and the A-group filling solenoid valve, and close the A-group pressure relief solenoid valve, the right-side delivery water pump 7 and the B-group filling solenoid valve; the left-side delivery water pump 7 draws the working medium from the storage bag 6 and delivers it to all pressure chambers of the pressure chamber A-group 11 through the A-group diversion chamber 41 and the diversion pipe 5. The pressure chamber A-group 11 is filled and expanded, providing the main support for the patient's head and neck; when the pressure sensor 33 detects that the pressure in the pressure chamber A-group 11 reaches the preset filling upper limit of 20 mmHg, PLC controller 9 closes the left-side delivery water pump 7 and the A-group filling solenoid valve, and enters the pressure holding state; At the same time, PLC controller 9 opens the right-side extraction pump 8 and the B-group pressure relief solenoid valve, and closes the B-group filling solenoid valve; the right-side extraction pump 8 extracts the working medium in the pressure chamber B-group 12, and returns it to the storage bag 6 through the B-group diversion chamber 42, and the pressure chamber B-group 12 is discharged to relieve pressure, realizing pressure unloading at the corresponding part; when the pressure sensor 33 detects that the pressure in the pressure chamber B-group 12 drops to the preset pressure relief lower limit of 2mmHg, PLC controller 9 closes the right-side extraction pump 8 and the B-group pressure relief solenoid valve, completing the control of the first cycle; Second working cycle (10-20 minutes): After the preset 10-minute alternation cycle ends, PLC controller 9 automatically switches the control sequence, turns on the right-side delivery water pump 7 and the B-group filling solenoid valve, and closes the B-group pressure relief solenoid valve, the left-side delivery water pump 7 and the A-group filling solenoid valve; the right-side delivery water pump 7 fills the pressure chamber B-group 12 with liquid to increase pressure, causing it to expand and provide the main support for the patient's head and neck. After the pressure reaches the preset value, it enters the pressure holding state; At the same time, PLC controller 9 opens the left extraction pump 8 and the pressure relief solenoid valve of group A, and closes the liquid filling solenoid valve of group A; the left extraction pump 8 extracts the working medium in the pressure chamber group A 11 and returns it to the liquid storage bag 6, the pressure chamber group A 11 drains and releases pressure, realizing pressure unloading of the corresponding part, and stops extraction after the pressure drops to the lower limit of pressure relief. After two cycles are completed, the PLC controller 9 controls the equipment to repeat the above working process in a cyclical manner, realizing the periodic alternating filling and depressurization of the two sets of pressure chambers, so that the pressure points of the patient's head and neck are continuously transferred, effectively eliminating continuous static pressure, realizing the periodic pressure unloading of bony prominences, and achieving the core purpose of pressure ulcer prevention.

[0025] During equipment operation, all pressure sensors 33 collect chamber pressure data in real time, and the PLC controller 9 monitors pressure changes in real time. When an abnormal pressure occurs, it automatically triggers pressure replenishment, pressure relief, or alarm actions. At the same time, it monitors the liquid level of the storage bag 6 in real time. When the liquid level is too low, it automatically stops and alarms to ensure the safety and stability of equipment operation.

[0026] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A multi-chamber water jet with active zoned alternating decompression, comprising a water jet body (1), a drive control assembly, a fluid diversion assembly, and a pressure monitoring assembly, characterized in that: The water pillow body (1) is provided with two sets of independent and fluid-isolated pressure chambers A (11) and B (12). The fluid distribution assembly is fluidly connected to the pressure chamber A group (11), the pressure chamber B group (12) and the drive control assembly, respectively, and is used to independently control the filling, pressure holding and pressure relief fluid paths of the pressure chamber A group (11) and the pressure chamber B group (12); The pressure monitoring assembly is set up one-to-one with the pressure chamber A group (11) and the pressure chamber B group (12). Its probe extends into the inner cavity of the corresponding pressure chamber to collect the internal liquid pressure data of each pressure chamber in real time and transmit the pressure data to the drive control assembly in real time. The drive control assembly is electrically connected to the fluid distribution assembly and the pressure monitoring assembly, respectively. It can perform closed-loop control based on preset timing control logic and combined with the pressure data collected in real time by the pressure monitoring assembly, so as to realize the alternating filling and pressurization and drainage of different pressure chamber groups, and complete the periodic pressure transfer and unloading of the pressure-bearing parts of the human body.

2. The multi-chamber water pillow with active zoned alternating decompression as described in claim 1, characterized in that, Both the pressure chamber group A (11) and the pressure chamber group B (12) contain multiple independent pressure chambers, and the pressure chambers of the pressure chamber group A (11) and the pressure chamber group B (12) are arranged in an alternating manner, so that adjacent pressure chambers belong to different chamber groups.

3. The multi-chamber water pillow with active partitioned alternating decompression as described in claim 2, characterized in that, The pressure monitoring assembly includes multiple sets of connecting pressure measuring components (3), each set of connecting pressure measuring components (3) includes a tee connector (31), a quick-release pipe connector (32) and a pressure sensor (33); The three-way connector (31) is integrally formed with the rear end interface of each pressure chamber in the corresponding pressure chamber group A (11) and pressure chamber group B (12). The first port of the three-way connector (31) is connected to the inner cavity of the pressure chamber group A (11) and pressure chamber group B (12). The second port is sealed to the diversion pipe (5) of the fluid diversion assembly through the quick-release pipe connector (32). The third port is sealed to the pressure sensor (33). The probe of the pressure sensor (33) extends through the inner cavity of the three-way connector (31) into the interior of the pressure chamber group A (11) and pressure chamber group B (12). Its signal output terminal is electrically connected to the drive control assembly.

4. The multi-chamber water pillow with active partitioned alternating decompression as described in claim 3, characterized in that, The drive control assembly includes an equipment bracket (2), a liquid storage bag (6), a water delivery pump group, a water extraction pump group, and a PLC controller (9). The equipment support (2) is located behind the water pillow body (1); the liquid storage bag (6) is placed inside the rear side of the equipment support (2) for storing the working medium; the conveying water pump group and the extraction water pump group are symmetrically installed on both sides of the equipment support (2); the PLC controller (9) is detachably installed on the front side of the equipment support (2), and its control output terminal is electrically connected to the controlled terminal of the conveying water pump group, the extraction water pump group, and the fluid diversion assembly, respectively, and its data input terminal is electrically connected to the signal output terminal of the pressure monitoring assembly.

5. The multi-chamber water pillow with active partitioned alternating decompression as described in claim 4, characterized in that, The equipment support (2) includes a support body (21), a support platform (22), a guide support (24), a water pump clamp (25), and a U-shaped support (26). The support platform (22) is integrally set on the lower front side of the bracket body (21). The top of the support platform (22) is equipped with two L-shaped clamps (23) with waist-shaped adjustment holes for clamping and fixing the PLC controller (9). The guide bracket (24) is horizontally fixed to the front middle of the bracket body (21). The guide bracket (24) has multiple cable slots for securing and fixing the connecting wires. The water pump clamping plate (25) is symmetrically arranged on both sides of the support body (21), and the water pump clamping plate (25) is provided with a U-shaped groove for water pump clamping; Two U-shaped brackets (26) are symmetrically arranged on the front top of the bracket body (21). The bottom plate of the U-shaped bracket (26) is provided with a limiting groove (27). A pressing slider (28) is slidably installed in the inner cavity of the U-shaped bracket (26). A pressing spring (29) is provided between the rear side of the pressing slider (28) and the rear upright plate of the U-shaped bracket (26). The pressing slider (28) is pushed by the elastic force of the pressing spring (29) to clamp and fix the fluid diversion assembly.

6. The multi-chamber water pillow with active partitioned alternating decompression as described in claim 5, characterized in that, The fluid splitting assembly includes a splitting component (4), a splitting pipe assembly, and a solenoid valve control unit; The diversion component (4) is fixedly installed on the top front side of the equipment bracket (2) of the drive control assembly. Inside it are set A group diversion chamber (41) and B group diversion chamber (42) which correspond to the pressure chamber A group (11) and the pressure chamber B group (12), are independent of each other and completely fluid isolated. The shunt tube assembly includes multiple medical flexible shunt tubes (5); the side walls of the A-group shunt cavity (41) and the B-group shunt cavity (42) are each provided with two quick-connect interfaces (44); the two quick-connect interfaces (44) are a filling interface and a pressure relief interface, respectively. The filling interface is connected to the delivery pump group of the drive control assembly, and the pressure relief interface is connected to the extraction pump group of the drive control assembly. Each solenoid valve in the solenoid valve control unit is connected in series with each filling pipeline and pressure relief pipeline, and its controlled end is electrically connected to the PLC controller (9) of the drive control assembly.

7. The multi-chamber water pillow with active zoned alternating decompression as described in claim 6, characterized in that, Multiple quick-release pipe joints (43) are provided on the front side of both the A-group flow chamber (41) and the B-group flow chamber (42); the two ends of the flow divider (5) are respectively sealed and connected to the quick-release pipe joints (43) and the corresponding interfaces of the pressure monitoring assembly; the A-group flow chamber (41) is in fluid communication with the pressure chamber A group (11); and the B-group flow chamber (42) is in fluid communication with the pressure chamber B group (12).

8. The multi-chamber water pillow with active partitioned alternating decompression as described in claim 6, characterized in that, The delivery pump group includes two delivery pumps (7), which are respectively installed on the pump clamps (25) near the front on both sides. The extraction pump group includes two extraction pumps (8), which are respectively installed on the pump clamps (25) near the rear on both sides. The filling port of the A group flow chamber (41) is connected to the output end of the left delivery pump (7), and the pressure relief port is connected to the input end of the left extraction pump (8). The filling port of the B group flow chamber (42) is connected to the output end of the right delivery pump (7), and the pressure relief port is connected to the input end of the right extraction pump (8). The input end of all delivery pumps (7) and the output end of extraction pumps (8) are connected to the inner cavity of the storage bag (6), and the output end of delivery pumps (7) and the input end of extraction pumps (8) are connected in series with a one-way valve to prevent backflow of the medium.

9. The multi-chamber water pillow with active partitioned alternating decompression as described in claim 6, characterized in that, The solenoid valve control unit includes a group of A-type filling solenoid valves, a group of A-type pressure relief solenoid valves, a group of B-type filling solenoid valves, and a group of B-type pressure relief solenoid valves. The A-group filling solenoid valve is connected in series to the filling pipeline of the A-group flow chamber (41), the A-group pressure relief solenoid valve is connected in series to the pressure relief pipeline of the A-group flow chamber (41), the B-group filling solenoid valve is connected in series to the filling pipeline of the B-group flow chamber (42), and the B-group pressure relief solenoid valve is connected in series to the pressure relief pipeline of the B-group flow chamber (42). All solenoid valves are normally closed solenoid valves, and their on / off states are independently controlled by the PLC controller (9) to realize independent control of the filling, pressure holding, and pressure relief paths of the corresponding pressure chamber groups.

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