A circulating temperature control type decompression pressure ulcer prevention device

Abstract

The present application relates to the technical field of medical apparatus and instruments, and aims to solve the problem that the existing pressure sore prevention nursing device cannot adaptively reduce pressure and blow according to the change of lying posture, and provides a circulating temperature control type pressure reduction pressure sore prevention device, which comprises a bed body, an accommodating cavity is formed in the bed body, a mattress is arranged on the top surface of the accommodating cavity, a plurality of pressure reduction pads are embedded in the mattress, each pressure reduction pad is sequentially provided with a ventilation and blowing layer, a pressure air bag layer and a constant temperature heat exchange liquid layer from top to bottom, a liquid path circulating pressure reduction mechanism is arranged in the accommodating cavity and sequentially communicates with the constant temperature heat exchange liquid layer of each pressure reduction pad, and an air path blowing and pressure reduction mechanism is arranged in the accommodating cavity and located at the bottom of each pressure reduction pad and sequentially communicates with the ventilation and blowing layer and the pressure air bag layer. The present application can adaptively switch the air bag pressure reduction and ventilation and blowing mode according to the change of the lying posture of the patient, perform constant temperature heat exchange and partitioned directional blowing on the pressure receiving part, and has a turning over timing reminding function.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a circulating temperature-controlled decompression and pressure ulcer prevention device. Background Technology

[0002] Pressure injuries, commonly known as pressure ulcers or bedsores, refer to tissue damage and necrosis caused by prolonged pressure on local tissues, leading to impaired blood circulation, persistent ischemia and hypoxia, and lack of nutrition. Pressure ulcers result from the combined effects of pressure, shear force, and friction, with sustained vertical pressure being the core causative factor. The risk of developing a pressure ulcer exists if a single area is subjected to pressure for more than two hours. Pressure ulcers are most common on bony prominences such as the sacrum, ischium, ankle, heel, and hip. Pressure ulcers not only cause physical pain and increase treatment costs but can also lead to serious complications such as local abscesses, bacteremia, septicemia, and osteomyelitis, severely impacting patient recovery and quality of life, and even endangering life.

[0003] Publication No. CN121265383 A discloses a dynamic pressure relief protective pad for high-risk areas of pressure ulcers, comprising: a protective plate, a base disposed below the protective plate, the top surface of the base being fixedly connected to the bottom surface of the protective plate, two annular mounting brackets symmetrically disposed inside the base, the outer side walls of the two annular mounting brackets being fixedly connected to the inner side wall of the base, and fan blades being rotatably mounted on the top surface of the two annular mounting brackets. The fan blades draw outside air into the base through ventilation holes on the periphery of the base, and then deliver it upward through the communication channel between the air pad and the base, forming an airflow circulation that runs through the cushion, reducing humidity and temperature at the contact area and reducing the causes of pressure ulcers. On the other hand, the top of the transmission rod drives the rotating disc inside the cushion to rotate, and multiple massage balls on the rotating disc rotate synchronously with the rotating disc, providing a gentle rolling massage to the buttocks, promoting local blood circulation, and relieving muscle pressure fatigue.

[0004] The above solution uses a fan to introduce external airflow to ventilate and cool the seat cushion, and uses massage balls to provide rolling massage to improve local blood circulation. However, it only targets local areas of the sitting position and lacks zoned adaptive airbag decompression based on changes in the patient's lying position. It is also difficult to perform zoned and directional blowing on the pressure-affected and damp areas of the patient in different lying positions. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a circulating temperature-controlled decompression and pressure ulcer prevention device that can adaptively switch between zoned airbag decompression and ventilation blowing modes according to changes in the patient's lying position, and perform constant temperature heat exchange and zoned directional blowing on the pressure-affected areas. It also has a turning timer reminder function to achieve pressure ulcer prevention care for long-term bedridden patients.

[0006] The main idea of ​​the technical solution adopted in this invention is as follows: Based on the characteristics of human body pressure distribution when lying down, this invention embeds pressure-reducing pads with independent zones inside the mattress corresponding to the high-incidence areas of pressure sores on the head, buttocks and left and right legs. Each pressure-reducing pad is set up with a three-layer structure from top to bottom: a ventilation and blowing layer, a pressure airbag layer and a constant temperature heat exchange liquid layer, so as to coordinate the functions of pressure buffering, constant temperature heat exchange and ventilation and dehumidification. The liquid circulation decompression mechanism uses a constant-temperature water tank and a circulating water pump to drive the heat exchange fluid to continuously circulate in a closed loop between the heat exchange coil and each decompression pad, achieving constant temperature control of the bed contact surface. The air purging decompression mechanism uses dual-outlet air pumps to independently control the inflation pipeline and the purging pipeline, respectively realizing airbag inflation decompression and body surface ventilation purging. The two functions can work simultaneously or independently. Based on the difference in leg force when the patient is supine or lateral, it can drive the sliding push rod and sliding rod to drive the pipeline switching rod assembly to rotate, changing the overlapping conduction state of the through-hole plate, thereby automatically distinguishing between supine and lateral postures and switching the inflation path, effectively improving the pressure ulcer prevention effect for long-term bedridden patients.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A circulating temperature-controlled decompression and pressure ulcer prevention device includes a bed frame, an internal cavity, and a mattress on top of the cavity. It also includes:

[0009] Multiple pressure-reducing pads are embedded inside the mattress. Each pressure-reducing pad has a ventilation and blowing layer, a pressure airbag layer, and a constant temperature heat exchange liquid layer arranged from top to bottom.

[0010] The liquid circulation pressure reduction mechanism is located inside the receiving cavity and is sequentially connected to the constant temperature heat exchange liquid layer of each pressure reduction pad.

[0011] The air purging and depressurization mechanism is located inside the receiving cavity and at the bottom of each depressurization pad, and is connected to the ventilation purging layer and the pressure airbag layer.

[0012] Furthermore, based on the above technical solution, the plurality of pressure-reducing pads include a head pressure-reducing pad, a buttock pressure-reducing pad, and a leg pressure-reducing pad arranged sequentially along the lying direction of the human body.

[0013] Furthermore, based on the above technical solutions, the liquid circulation pressure reduction mechanism includes:

[0014] A constant temperature water storage tank is located below the bed, and it contains a constant temperature heating element and a circulating water pump.

[0015] The heat exchange coil is laid inside the containment cavity and is connected in sequence to the constant temperature heat exchange liquid layer of each pressure reducing pad. The two ends of the heat exchange coil are connected to the constant temperature water storage tank and the circulating water pump to form a closed loop.

[0016] Furthermore, based on the above technical solution, the gas path purging and pressure reducing mechanism includes:

[0017] Dual-outlet air pumps are located at the bottom of the bed, on the side near the leg pressure pad;

[0018] The purging pipeline is laid at the bottom of each pressure relief pad. One end of the pipeline passes through the receiving cavity and is connected to one of the air outlets of the dual-outlet air pump. The other end extends and is connected to the inner wall of the receiving cavity near the head pressure relief pad.

[0019] An inflation tube is coaxially sleeved inside the purge tube. One end of the tube is connected to the other outlet of the dual-outlet air pump, and the other end extends and connects to the inner wall of the receiving cavity near the head pressure relief pad. A first through-hole plate is provided on the side of the inflation tube near the leg pressure relief pad.

[0020] The recumbent decompression adjustment component is rotatably mounted on the outside of the purge pipe corresponding to the bottom of the leg decompression pad, and is used to switch the inflation zone according to the recumbent position;

[0021] The purge pipes are connected to the ventilation and purge layers of each pressure-reducing pad via purge pipes, and the inflation pipes are connected to the pressure airbag layers of each pressure-reducing pad via inflation pipes. The pressure airbag layers have connecting holes at the top, and the ventilation and purge layers are equipped with sealing blocks corresponding to the connecting holes.

[0022] Furthermore, based on the above technical solution, the supine posture decompression adjustment component includes:

[0023] The pipeline switching rod assembly is rotatably sleeved on the outside of the purging pipeline;

[0024] The connecting pipe is vertically opened in the middle of the constant temperature heat exchange liquid layer of the leg pressure relief pad and is connected to the pressure airbag layer. A sliding push rod is slidably installed inside it.

[0025] The sliding rod has one end slidably connected to the inside of the pipeline switching rod assembly, and the other end is hinged to the sliding push rod.

[0026] The turning timing component is located at the bottom of the pipeline switching rod assembly.

[0027] Furthermore, based on the above technical solution, the pipeline switching rod assembly includes:

[0028] The outer rod body is rotatably sleeved on the outside of the purging pipe, and extension rods are symmetrically arranged on both sides of it;

[0029] The inner rod is rotatably sleeved on the outside of the inflation tube, with one end extending forward and having a second through-hole plate.

[0030] The first connecting air tube is connected at one end to the purge line and at the other end to the sliding rod.

[0031] The second connecting air tube is connected at one end to the inflation line and at the other end to the sliding rod.

[0032] Furthermore, based on the above technical solution, the turning-over timing device includes:

[0033] The turning timer is embedded in the bottom of the receiving cavity.

[0034] The pressing plate is slidably positioned above the turning timer via an elastic element.

[0035] The beneficial effects of this invention are:

[0036] 1. This invention divides the pressure-reducing pad into sections: a head pressure-reducing pad, a buttock pressure-reducing pad, and independently separate left and right leg pressure-reducing pads. Combined with a lying posture pressure-reducing adjustment component, the airbag inflation area can be automatically switched according to the patient's supine or lateral lying posture. This achieves zoned adaptive inflation and pressure reduction of the airbag, effectively dispersing local concentrated pressure on bony prominences and avoiding ischemic damage caused by prolonged bed rest.

[0037] 2. This invention sets up a pressure-reducing pad from top to bottom as a ventilation and purge layer, a pressure airbag layer, and a constant-temperature heat exchange liquid layer. A connecting hole is opened at the top of the pressure airbag layer and a sealing block is set at the bottom of the ventilation and purge layer. The patient's own weight is used to achieve adaptive switching between airbag sealing and pressure maintenance in the supine position and airbag through-purge in the lateral position. The pressure reduction function of the pressure airbag layer and the drying function of the ventilation and purge layer work together to ensure effective pressure reduction of the pressure area and realize ventilation and moisture dissipation of the skin surface.

[0038] 3. The present invention sets up a liquid circulation pressure reduction mechanism, which uses a constant temperature water tank, a constant temperature heating element, a circulating water pump and a heat exchange coil to form a closed loop, continuously providing a constant temperature heat exchange medium for the constant temperature heat exchange liquid layer of each pressure reduction pad, and at the same time, through heat exchange with the purging air path, the blown airflow reaches a suitable temperature.

[0039] 4. This invention, through the synergistic effect of the turning timer and the tubing switching rod assembly, can automatically trigger the turning timer to reset and restart when the patient lies on their side, causing the tubing switching rod to rotate and press down. This achieves a cyclical timed reminder for turning actions, and, in conjunction with an alarm, provides audible and visual prompts, effectively assisting nursing staff in performing the turning operation every 2 hours in a standardized manner. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 For the present invention Figure 1 Remove the mattress structure diagram;

[0042] Figure 3 For the present invention Figure 1Cross-sectional structural diagram;

[0043] Figure 4 For the present invention Figure 3 Enlarged view of point A;

[0044] Figure 5 For the present invention Figure 3 Enlarged view of point B;

[0045] Figure 6 This is a schematic diagram of the connection relationship of the patient's supine posture decompression adjustment component according to the present invention;

[0046] Figure 7 This is a cross-sectional structural diagram of the patient's supine posture decompression adjustment component of the present invention;

[0047] Figure 8 This is a schematic diagram of the connection relationship of the patient's lateral decompression adjustment component in this invention;

[0048] Figure 9 This is a cross-sectional structural diagram of the patient's lateral decompression adjustment component according to the present invention;

[0049] Figure 10 This is a schematic diagram of the pipeline switching rod assembly structure of the present invention;

[0050] Figure 11 For the present invention Figure 9 Cross-sectional structural diagram;

[0051] Figure 12 This is a schematic diagram showing the connection relationship between the pipeline switching rod assembly and the sliding rod of the present invention;

[0052] Figure 13 This is a schematic diagram illustrating the application of the present invention.

[0053] The components include: 1. Bed frame; 11. Receiving cavity; 12. Mattress; 2. Head pressure relief pad; 21. Ventilation and purge layer; 211. Purge hole; 22. Pressure airbag layer; 221. Connecting hole; 222. Sealing block; 23. Constant temperature heat exchange liquid layer; 3. Hip pressure relief pad; 4. Leg pressure relief pad; 41. Left leg pressure relief pad; 42. Right leg pressure relief pad; 5. Liquid circulation pressure relief mechanism; 51. Constant temperature water tank; 511. Constant temperature heating element; 512. Circulating water pump; 52. Heat exchange coil; 6. Dual-outlet air pump; 7. Purge pipeline; 71. Purge... 8. Inflation pipe; 81. First through-hole plate; 82. Inflation pipe; 9. Postural decompression adjustment assembly; 91. Pipe switching rod assembly; 911. Outer rod; 912. Extension rod; 913. Inner rod; 914. Second through-hole plate; 915. First connecting air pipe; 916. Second connecting air pipe; 92. Connecting pipe; 93. Sliding push rod; 931. One-way valve; 94. Sliding rod; 95. Turning timer; 951. Turning timer; 952. Pressing plate; 953. Elastic element; 96. Control panel; 97. Alarm. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0055] The inventors discovered that existing pressure ulcer care devices use fans to introduce external airflow to ventilate and cool the seat cushion, and massage balls to provide rolling massage to improve local blood circulation. However, these devices only target local areas of the sitting position and lack zoned adaptive airbag decompression based on changes in the patient's lying position. Furthermore, they are difficult to directionally blow on the pressure-sensitive and damp areas of the patient in different lying positions.

[0056] Based on the above findings, this application proposes a circulating temperature-controlled pressure relief and pressure ulcer prevention device. According to the characteristics of human body pressure distribution when lying down, pressure relief pads with independent zones are embedded inside the mattress corresponding to the high-incidence areas of pressure ulcers in the head, buttocks and left and right legs. Each pressure relief pad is set up with a three-layer structure from top to bottom: a ventilation and blowing layer, a pressure airbag layer and a constant temperature heat exchange liquid layer, so that pressure buffering, constant temperature heat exchange and ventilation and dehumidification functions are set up in a coordinated manner. The liquid circulation decompression mechanism uses a constant-temperature water tank and a circulating water pump to drive the heat exchange fluid to continuously circulate in a closed loop between the heat exchange coil and each decompression pad, achieving constant temperature control of the bed contact surface. The air purging decompression mechanism uses dual-outlet air pumps to independently control the inflation pipeline and the purging pipeline, respectively realizing airbag inflation decompression and body surface ventilation purging. The two functions can work simultaneously or independently. Based on the difference in leg force when the patient is supine or lateral, it can drive the sliding push rod and sliding rod to drive the pipeline switching rod assembly to rotate, changing the overlapping conduction state of the through-hole plate, thereby automatically distinguishing between supine and lateral postures and switching the inflation path, effectively improving the pressure ulcer prevention effect for long-term bedridden patients.

[0057] Example:

[0058] See Figures 1-13 This application discloses a circulating temperature-controlled decompression and pressure ulcer prevention device, which is suitable for bedridden disabled patients, postoperative recuperation patients, and elderly paralyzed people for bedridden pressure ulcer prevention care. It includes a bed body 1, multiple decompression pads, a liquid circulation decompression mechanism 5, and an air purging decompression mechanism.

[0059] The bed body 1 is a conventional rectangular structure. The bed body 1 has a hollow cavity 11 inside. A mattress 12 is provided on the top surface of the cavity 11. Multiple pressure-relieving pads are provided and embedded in the mattress 12 and are connected to the cavity 11.

[0060] The multiple pressure-relief pads are arranged in sequence along the longitudinal direction of the human body lying down, based on the force distribution of the human body. The head pressure-relief pad 2, the buttock pressure-relief pad 3, and the leg pressure-relief pad 4 are arranged in sequence. The leg pressure-relief pad 4 is symmetrically divided into an independent left leg pressure-relief pad 41 and a right leg pressure-relief pad 42, which are used to match the three major pressure-relief areas of the human body that are prone to pressure sores: the head, buttocks, and legs, so as to achieve targeted zoned pressure relief.

[0061] Each pressure-reducing pad is provided with a ventilation and purging layer 21, a pressure airbag layer 22, and a constant-temperature heat exchange liquid layer 23 in sequence from top to bottom. The ventilation and purging layer 21 has multiple purging holes 211 on its upper side and a sealing block 222 integrally formed at its bottom. The pressure airbag layer 22 is located below the ventilation and purging layer 21, and a connecting hole 221 is provided in its middle corresponding to the position of the sealing block 222, which serves as an airflow channel to realize airflow communication between the pressure airbag layer 22 and the ventilation and purging layer 21. The constant-temperature heat exchange liquid layer 23 is located below the pressure airbag layer 22.

[0062] Next, the liquid circulation pressure reduction mechanism 5 is assembled inside the receiving cavity 11 and the bottom of the bed body 1 to provide constant temperature circulation heat exchange function for each pressure reduction pad, and at the same time, it uses the flexible buffering characteristics of liquid to achieve pressure reduction. It includes a constant temperature water storage tank 51 and a heat exchange coil 52.

[0063] The constant temperature water storage tank 51 is located at the bottom of the bed 1. Preferably, its exterior can be covered with insulation material to reduce heat loss. The constant temperature water storage tank 51 is equipped with a constant temperature heating element 511 and a circulating water pump 512. In this embodiment, the constant temperature heating element 511 is preferably a PTC constant temperature heating tube with a power of 300W, a temperature control accuracy of ±0.5℃, and a temperature control adjustment range of 22℃-38℃, which can be manually or automatically adjusted according to the ambient temperature. The circulating water pump 512 is a silent micro-boost pump with an operating noise ≤35dB.

[0064] The heat exchange coil 52 is coiled and laid inside the receiving cavity 11. The inlet end of the heat exchange coil 52 is connected to the outlet end of the circulating water pump 512. Then, the heat exchange coil 52 is coiled and connected in series with the constant temperature heat exchange liquid layer 23 of each pressure reducing pad along the pipeline. The outlet end of the heat exchange coil 52 is finally connected back to the inside of the constant temperature water storage tank 51, thus forming a sealed closed loop. When the device is running, the circulating water pump 512 drives the heat exchange liquid to circulate continuously. After being constant temperature controlled by the constant temperature heating element 511, it flows evenly through the liquid layer of each pressure reducing pad to achieve constant temperature heat exchange of the human body under pressure and heat exchange of the blown gas.

[0065] Next, the air purging and decompression mechanism is located inside the receiving cavity 11 and at the bottom of each decompression pad, and is connected to the ventilation purging layer 21 and the pressure airbag layer 22. It is used to realize ventilation purging and drying and airbag inflation and decompression through dual air paths, and includes a dual-outlet air pump 6, a purging pipeline 7, an inflation pipeline 8, and a horizontal decompression adjustment component 9.

[0066] The dual-outlet air pump 6 is fixedly installed at the bottom of the bed 1 near the leg pressure pad 4. In this embodiment, it is preferably a VCC series dual-head micro air pump with independent pressure control for the two air outlets. It can supply air to the purging air path and the inflation air path separately, supporting simultaneous operation and time-sharing operation.

[0067] One end of the purge pipe 7 passes through the side wall of the receiving cavity 11 and is connected to one of the air outlets of the dual-outlet air pump 6. The other end extends to the inner side wall of the receiving cavity 11 near the head pressure relief pad 2 and is sealed and fixed. The purge pipe 7 is provided with a purge tube 71 at the top of the purge pipe 7 relative to the head pressure relief pad 2 and the buttock pressure relief pad 3. Each purge tube 71 extends vertically upward and is connected to the pressure airbag layer 22. It is also connected to the ventilation purge layer 21 through the connecting hole 221 on the pressure airbag layer 22. By inflating the purge pipe 7, dry airflow can be delivered to the ventilation purge layer 21 of each zone. At the same time, through heat exchange with the constant temperature heat exchange liquid layer 23, the blown airflow reaches a suitable temperature to achieve the effects of ventilation and air exchange of the pressure-bearing skin, dissipation of moisture, keeping the skin dry, and gentle pressure relief.

[0068] The inner diameter of the inflation tube 8 is smaller than that of the purge tube 7. The inflation tube 8 is sleeved inside the purge tube 7. One end of the inflation tube 8 is connected to the other outlet of the dual-outlet air pump 6, and the other end extends to the inner wall of the receiving cavity 11 near the head pressure relief pad 2 and is sealed and fixed. The inflation tube 8 is provided with an inflation tube 82 at the top of the inflation tube 8 relative to the head pressure relief pad 2 and the buttock pressure relief pad 3, respectively, which is connected to the pressure airbag layer 22 for inflating the pressure airbag layer 22 and adjusting the support height and pressure of the pressure airbag layer 22.

[0069] It is worth noting that the connecting hole 221 at the top of the pressure airbag layer 22 corresponds to the sealing block 222 at the bottom of the ventilation and purge layer 21. When the patient lies flat, the patient's weight will cause the sealing block 222 to completely block the connecting hole 221. At this time, the airflow in the pressure airbag layer 22 is sealed inside the airbag, stably supporting the human body and achieving pressure buffering and decompression. When the patient lies on their side, the patient's weight will be concentrated on one side of the decompression pad. At this time, the sealing block 222 releases the connecting hole 221, and the airflow of the pressure airbag layer 22 will purge the patient's bedding through the purge hole 211 to achieve ventilation, heat dissipation and dehumidification.

[0070] Furthermore, the supine decompression adjustment component 9 is rotatably disposed on the outside of the purge tube 7 at the bottom of the leg decompression pad 4. It can automatically switch the airbag inflation area and the purge area according to different supine positions such as lying flat or lying on the side, and at the same time realize the assisted turning reminder. It includes a tube switching rod assembly 91, a connecting tube 92, a sliding push rod 93, a sliding rod 94, and a turning timer 95.

[0071] The pipeline switching rod assembly 91 is a double-layer nested rotating rod structure, including an outer rod 911 and an inner rod 913 coaxially sleeved. The outer rod 911 is rotatably sleeved on the outside of the purging pipeline 7, and the left and right sides of the outer rod 911 are symmetrically formed integral extension rods 912. The inner rod 913 is fixedly installed inside the outer rod 911 and rotatably sleeved on the outside of the inflation pipeline 8, rotating synchronously with the outer rod, and one end of the inner rod 913 extends forward.

[0072] It should be noted that a first through-hole plate 81 is fixedly installed on the side of the air pipe 8 near the leg pressure relief pad 4. The first through-hole plate 81 is evenly distributed with ventilation holes. A second through-hole plate 914 is opened at the end of the extension of the inner rod 913. The second through-hole plate 914 is also evenly distributed with ventilation holes. It cooperates with the first through-hole plate 81. When rotated, it can change the overlapping area of ​​the ventilation holes on the first through-hole plate 81 and the ventilation holes on the second through-hole plate 914, so as to realize the opening and closing of the airflow to the buttock pressure relief pad 3 and the head pressure relief pad 4.

[0073] Furthermore, both the left leg pressure relief pad 41 and the right leg pressure relief pad 42 have a vertically connected pipe 92 in the middle of the constant temperature heat exchange liquid layer 23. The connected pipe 92 vertically penetrates the constant temperature heat exchange liquid layer 23 and connects to the pressure airbag layer 22. Both connected pipes 92 have a vertically sliding push rod 93 inside. The push rod 93 is hollow inside and has a one-way valve 931 on it, which only allows gas to enter the pressure airbag layer 22 from the inside of the push rod 93 in one direction.

[0074] The sliding rod 94 is laterally slidably connected to the inside of the extension rod 912. The sliding rod 94 has a hollow inner cavity, and one end of it is hinged to the bottom of the sliding push rod 93 and connected to each other. The sliding rod 94 can slide back and forth with the rotation of the pipeline switching rod assembly 91, thereby driving the sliding push rod 93 to push vertically or fall back, and cooperate with the gas path switching to realize zoned pressure regulation.

[0075] Furthermore, the outer rod body 911 is symmetrically provided with first connecting air pipes 915 on both sides. One end of the first connecting air pipe 915 is connected to the purge pipe 7, and the other end is slidably connected to and connected to the sliding rod 94. The inner rod body 913 is symmetrically provided with second connecting air pipes 916 on both sides. One end of the second connecting air pipe 916 is connected to the inflation pipe 8, and the other end is slidably connected to and connected to the sliding rod 94.

[0076] Furthermore, the turning-over timing component 95 is embedded in the bottom of the receiving cavity 11 and located directly below the pipeline switching rod assembly 91, and is used to trigger the turning-over reminder at regular intervals. It includes a turning-over timer 951, a pressing plate 952, and an elastic component 953.

[0077] Specifically, the turning timer 951 is an electronic programmable timer that can be preset to a standard turning cycle of 2 hours. The pressing plate 952 is suspended above the turning timer 941 by the elastic element 953 set at its bottom. When the pipeline switching rod assembly 91 rotates and presses down, it can squeeze the pressing plate 952 to trigger the turning timer 941 to reset the timing. After completing one turning action, the timing will automatically restart to realize a cyclical timed reminder.

[0078] The bed frame 1 is also equipped with a control board 96 and an alarm 97. The control board 96 is embedded in the middle of the side of the bed frame 1. Preferably, it can be a touch-screen digital display integrated panel, integrating temperature adjustment buttons, air pump pressure adjustment buttons, timer cycle setting buttons, and a status display screen, which can realize manual setting of the device's parameters, mode switching, and real-time monitoring of the operating status. The control board 96 integrates a main control microcontroller, which is electrically connected to the constant temperature heating element 511, circulating water pump 512, dual-outlet air pump 6, and turning timer 951, respectively, and automatically collects temperature, air pressure, and timing signals and executes closed-loop control. The alarm 97 is fixedly installed on one side of the control board 96. Preferably, it can be an integrated sound and light alarm structure, electrically coupled to the control board 96. When the turning timer 951 reaches zero, the liquid circulation is abnormal, the air pressure is abnormal, or the temperature control exceeds the tolerance, the control board 96 immediately triggers the alarm 97 to emit sound and light prompts, reminding nursing staff to intervene in time, turn the patient, or troubleshoot equipment malfunctions.

[0079] It is worth noting that the force exerted on the human body while lying in bed varies significantly depending on posture. In the supine position, the load is mainly concentrated in the head and buttocks area, while in the lateral position, the load is mainly concentrated in the leg area. This application can achieve adaptive switching between airbag inflation / decompression and ventilation / purge modes based on the patient's supine or lateral position. Furthermore, the airway purging and airbag inflation / decompression functions can operate simultaneously and independently or be started and stopped separately at different times, as detailed below:

[0080] When the patient is in a supine position, the head and buttocks are centered on the pressure-reducing pads, and both legs are evenly supported on the left leg pressure-reducing pad 41 and the right leg pressure-reducing pad 42, with no unilateral pressure on the legs. At this time, the pipeline switching rod assembly 91 maintains its initial horizontal position, and the vent holes of the first through-hole plate 81 and the second through-hole plate 914 are completely aligned, and the air passage is in a conductive and guiding state. Under the uniform compaction effect of the body's own weight, the sealing blocks 222 at the bottom of each pressure-reducing pad ventilation and purge layer 21 tightly seal the connecting holes 221 at the top of the pressure airbag layer 22, isolating the pressure airbag layer 22 from the ventilation and purge layer 21 and forming an independent sealed air chamber. At this time, the dual-outlet air pump 6 inflates each pressure airbag layer 22 uniformly through the purge pipeline 7 and / or the inflation pipeline 8. The airbags expand uniformly as a whole, flexibly supporting the pressure contact surface of the human body, dispersing the local concentrated pressure on the head, buttocks, and legs, achieving a pressure-reducing effect, and effectively avoiding pressure ischemia and pressure sores caused by prolonged supine lying.

[0081] When the patient is in a lateral decubitus position, taking the left lateral decubitus position as an example, the load on the human torso shifts to one side, and the pressure of the head pressure relief pad 2 and the buttock pressure relief pad 3 may shift to the left. The sealing block 222 at the bottom of the ventilation and purge layer 21 releases the seal on the top connecting hole 221 of the pressure airbag layer 22, so that the pressure airbag layer 22 and the ventilation and purge layer 21 are interconnected, forming an airflow channel that is connected from top to bottom.

[0082] In this state, the airflow inside the pressure bladder layer 22 can diffuse upwards to the ventilation and purge layer 21 through the connecting hole 221, and in conjunction with the active air supply of the purge pipe 7, continuously purge the patient's body surface and the gaps in the bedding with airflow, quickly dissipating moisture, sweat and local heat accumulation, keeping the contact surface of the bed dry and breathable. At the same time, when lying on the left side, the patient's legs bear the load completely on the left leg pressure relief pad 41, while the right leg pressure relief pad 42 is in a suspended and unloaded state. The left leg pressure relief pad 41 is compressed by the body's own weight, and the gas inside the pressure bladder layer 22 is compressed and converged. The airflow pushes the sliding rod 93 downwards through the connecting pipe 92. The sliding rod 94 moves in linkage with it and pulls the pipe switching rod assembly 91 to rotate and deflect, causing the ventilation holes of the first through-hole plate 81 and the second through-hole plate 914 to be misaligned and separated, and the air route switches from a guided flow state to a cut-off non-guided flow state. At this time, the airflow only supplies air to the leg pressure relief pad 4. At this time, the pressure relief pad 41 of the left leg, which is under pressure, only achieves the pressure relief effect through the continuous pressure maintenance and inflation of the pressure airbag layer 22 due to the effect of the sealing block 222. The pressure relief pad 42 of the unloaded right leg is switched to a pure ventilation blowing effect.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A circulating temperature-controlled pressure relief and pressure ulcer prevention device, comprising a bed body (1), wherein a receiving cavity (11) is provided inside the bed body (1), and a mattress (12) is provided on the top surface of the receiving cavity (11), characterized in that, Also includes: Multiple pressure-reducing pads are embedded inside the mattress (12). Each pressure-reducing pad is provided with a ventilation and blowing layer (21), a pressure airbag layer (22), and a constant temperature heat exchange liquid layer (23) from top to bottom. The liquid circulation pressure reduction mechanism (5) is set inside the accommodating cavity (11) and is connected to the constant temperature heat exchange liquid layer (23) of each pressure reduction pad in sequence; The air purging and depressurization mechanism is located inside the receiving cavity (11) and at the bottom of each depressurization pad, and is connected to the ventilation purging layer (21) and the pressure airbag layer (22).

2. The circulating temperature-controlled pressure relief and pressure ulcer prevention device according to claim 1, characterized in that, The plurality of pressure-relieving pads include a head pressure-relieving pad (2), a buttock pressure-relieving pad (3), and a leg pressure-relieving pad (4) arranged sequentially along the lying direction of the human body.

3. The circulating temperature-controlled pressure relief and pressure ulcer prevention device according to claim 2, characterized in that, The liquid circulation pressure reducing mechanism (5) includes: A constant temperature water storage tank (51) is located below the bed (1), and a constant temperature heating element (511) and a circulating water pump (512) are installed inside it. The heat exchange coil (52) is laid inside the containment cavity (11) and connected in sequence to the constant temperature heat exchange liquid layer (23) of each pressure reducing pad. The two ends of the heat exchange coil (52) are connected to the constant temperature water storage tank (51) and the circulating water pump (512) to form a closed loop.

4. The circulating temperature-controlled pressure relief and pressure ulcer prevention device according to claim 3, characterized in that, The gas path purging and pressure reduction mechanism includes: A dual-outlet air pump (6) is installed at the bottom of the bed (1) on one side near the leg pressure relief pad (4); The purge line (7) is laid at the bottom of each pressure relief pad. One end of it passes through the receiving cavity (11) and is connected to one of the outlets of the dual-outlet air pump (6). The other end extends and is connected to the inner wall of the receiving cavity (11) near the head pressure relief pad (2). The inflation line (8) is coaxially sleeved inside the purge line (7). One end of the line is connected to the other outlet of the dual-outlet air pump (6), and the other end extends and is connected to the inner wall of the receiving cavity (11) near the head pressure relief pad (2). A first through-hole plate (81) is provided inside the inflation line (8) on the side near the leg pressure relief pad (4). The lying posture decompression adjustment component (9) is rotatably set on the outside of the purge pipe (7) corresponding to the bottom of the leg decompression pad (4) and is used to switch the inflation area according to the lying posture; The purge pipe (7) is connected to the ventilation purge layer (21) of each pressure relief pad through the purge pipe (71), and the inflation pipe (8) is connected to the pressure airbag layer (22) of each pressure relief pad through the inflation pipe (82). The pressure airbag layer (22) has a connecting hole (221) at the top, and the ventilation purge layer (21) is equipped with a sealing block (222) corresponding to the connecting hole (221).

5. A circulating temperature-controlled pressure relief and pressure ulcer prevention device according to claim 4, characterized in that, The supine decompression adjustment component (9) includes: The pipeline switching rod assembly (91) is rotatably sleeved on the outside of the purging pipeline (7); The connecting pipe (92) is vertically opened in the middle of the constant temperature heat exchange liquid layer (23) of the leg pressure pad (4) and is connected to the pressure airbag layer (22). A sliding push rod (93) is slidably installed inside it. The sliding rod (94) is slidably connected at one end to the inside of the pipeline switching rod assembly (91), and the other end is hinged to the sliding push rod (93); The turning timing component (95) is located at the bottom of the pipeline switching rod assembly (91).

6. A circulating temperature-controlled pressure relief and pressure ulcer prevention device according to claim 5, characterized in that, The pipeline switching rod assembly (91) includes: The outer rod (911) is rotatably sleeved on the outside of the purging pipe (7), and extension rods (912) are symmetrically arranged on both sides of it. The inner rod (913) is rotatably sleeved on the outside of the air-filling pipe (8), with one end extending forward and having a second through-hole plate (914). The first connecting air tube (915) is connected at one end to the purge line (7) and at the other end to the sliding rod (94); The second connecting air pipe (916) is connected at one end to the inflation pipe (8) and at the other end to the sliding rod (94).

7. A circulating temperature-controlled pressure relief and pressure ulcer prevention device according to claim 6, characterized in that, The turning timing device (95) includes: A turning timer (951) is embedded in the bottom of the receiving cavity (11). The pressing plate (952) is slidably positioned above the turning timer (951) via the elastic element (953).

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