Temperature-adjustable anti-bedsore inflatable mattress system

Abstract

According to the temperature-adjustable anti-bedsore inflatable mattress system, an inflatable mattress is composed of a plurality of first air belts and second air belts which are arranged in parallel in a staggered mode, and air ports of the first air belts and the second air belts are communicated with two air pipeline connectors of an air exchange rotary valve through pipelines respectively. The other two opposite gas pipeline connectors of the gas exchange rotary valve are communicated with two gas ports of the gas inlet and outlet buffer tank through pipelines, and the other two gas ports of the gas inlet and outlet buffer tank are communicated with two gas connectors of the gas-liquid heat exchanger through the gas pump to form a circulation loop. The refrigeration compressor is connected with the gas-liquid heat exchanger, and the refrigeration compressor and the control end of the air pump are connected with the single-chip microcomputer. The inflatable mattress is scientific and reasonable in design and convenient to operate and use, the temperature in the inflatable mattress can be intelligently and stably adjusted in real time according to the requirements of a patient, the patient is made to be at the comfortable temperature, the better bedsore prevention effect is achieved, and good social and economic benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of nursing products, and in particular to an adjustable temperature anti-bedsore air mattress system. Background Technology

[0002] Pressure ulcers are a common complication in long-term bedridden patients, often caused by prolonged pressure on a localized area of ​​the body, leading to impaired blood circulation, tissue malnutrition, and necrosis of the skin and subcutaneous tissue. Pressure ulcers not only cause pain and affect the patient's quality of life, but can also lead to serious complications such as infection, increasing medical costs and hospital stays, and even endangering life. Statistics show a high incidence of pressure ulcers among elderly patients who are bedridden for extended periods, placing a heavy burden on patients and their families.

[0003] To address this issue, an anti-bedsore air mattress has been disclosed. The air mattress is divided into two sections, each of which is further divided into multiple strip-shaped air belts. The two sections are arranged alternately, allowing for inflation or deflation of every other air belt. This provides alternating relief of pressure on the pressure surfaces of patients who are bedridden for extended periods, ultimately preventing or reducing the occurrence of bedsores. Through continuous improvement, various anti-bedsore air mattresses are now available on the market, all of which can alleviate bedsore problems to varying degrees and reduce the suffering of patients who are bedridden for extended periods.

[0004] However, currently available anti-bedsore air mattresses do not have the function of adjusting the internal gas temperature. They cannot adjust the internal temperature of the air mattress according to seasonal and ambient temperature changes, which affects the patient's comfort and the anti-bedsore effect. In order to further improve the anti-bedsore effect and increase the patient's comfort, the structure and design of existing anti-bedsore air mattresses need to be further improved and innovated. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide an adjustable temperature anti-bedsore air mattress system, which can effectively solve the problem that the existing anti-bedsore air mattresses cannot adjust the temperature.

[0006] To achieve the above objectives, the technical solution provided by this utility model is an adjustable temperature anti-bedsore air mattress system, comprising an air mattress, an air pump, and a microcontroller. The air mattress is composed of several parallel and staggered first and second air belts. The air inlets of the first and second air belts are respectively connected to two gas pipeline interfaces of a gas exchange rotary valve via pipes. The other two opposing gas pipeline interfaces of the gas exchange rotary valve are connected to two air inlets of an inlet / outlet buffer tank via pipes. The other two air inlets of the inlet / outlet buffer tank are connected to two gas interfaces of a gas-liquid heat exchanger via the air pump, forming a circulation loop. The refrigeration compressor is connected to the gas-liquid heat exchanger, and the control terminals of the refrigeration compressor and the air pump are respectively connected to the microcontroller.

[0007] This utility model is scientifically and rationally designed, easy to operate and use, and can intelligently and stably adjust the temperature inside the air mattress in real time according to the patient's needs, so that the patient is in a comfortable temperature, resulting in a better effect in preventing bedsores, and has good social and economic benefits. Attached Figure Description

[0008] Figure 1 This is a structural diagram of the system of this utility model.

[0009] Figure 2 This is a structural diagram of the gas exchange rotary valve of this utility model.

[0010] Figure 3 This is a schematic diagram of the internal structure of the valve head and the gas exchange process of the gas exchange rotary valve of this utility model.

[0011] Figure 4 This is a structural diagram of the intake and exhaust buffer tank of this utility model.

[0012] Figure 5 This is an exploded view of the high-pressure exhaust valve structure of this utility model.

[0013] Figure 6 This is a three-dimensional structural diagram of the high-pressure exhaust valve of this utility model.

[0014] Figure 7 This is an overall structural diagram of the gas-liquid heat exchanger of this utility model. Detailed Implementation

[0015] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings and specific circumstances.

[0016] As shown in the attached figures, an adjustable temperature anti-decubitus air mattress system includes an air mattress, an air pump, and a microcontroller. The air mattress 1 is composed of several parallel and staggered first air belts 101 and second air belts 102. The air inlets of the first air belts 101 and second air belts 102 are respectively connected to two gas pipeline interfaces 208 of a gas exchange rotary valve 2 via pipes. The other two gas pipeline interfaces 208 of the gas exchange rotary valve 2 are connected to two air inlets of an inlet / outlet buffer tank 3 via pipes. The other two air inlets of the inlet / outlet buffer tank 3 are connected to two gas interfaces 511 of a gas-liquid heat exchanger 5 via an air pump 7, forming a circulation loop. A refrigeration compressor 4 is connected to the gas-liquid heat exchanger 5. The control terminals of the refrigeration compressor 4 and the air pump 7 are respectively connected to the microcontroller 8.

[0017] To ensure better implementation results, the gas exchange rotary valve 2 consists of a rotary valve head 201 and a rotary valve drive motor 202 connected to the rotary valve head 201. The rotary valve head 201 includes a compression spring 203, a lower rotary valve plate 204, an upper rotary valve plate 205, and a pin 206. The lower rotary valve plate 204 has four symmetrically arranged gas pipeline interfaces 208 on its outer circumference, which are connected to four gas passage slots 210 of the lower rotary valve plate 204. The lower rotary valve plate 204 is located above the center of the rotary valve drive motor 202. The upper rotary valve plate 205 has symmetrically arranged... Two gas communication channels 209 are provided, with the arc length of the gas communication channel 209 being greater than the arc length of the gas passage channel 210. The upper rotary valve plate 205 is located on the lower rotary valve plate 204. The motor shaft of the rotary valve drive motor 202 passes through the central shaft holes of the lower rotary valve plate 204 and the upper rotary valve plate 205 in sequence and is fixedly connected to the pin 206 on the upper rotary valve plate 205. A compression spring 203 is fitted on the motor shaft between the lower rotary valve plate 204 and the rotary valve drive motor 202. A fixing part 207 for fixing the lower rotary valve plate 204 is provided on the rotary valve drive motor 202.

[0018] Furthermore, the gas exchange rotary valve 2 is made of ceramic material, which is wear-resistant and reliable. The central shaft hole of the lower plate 204 of the rotary valve is connected to the motor shaft of the rotary valve drive motor 202 via a bearing. The cooperation between the bearing and the fixing part 207 ensures that the lower plate 204 of the rotary valve will not rotate synchronously with the motor shaft. The gas exchange rotary valve 2 of this utility model can ensure that the gas circulates inside the air mattress and pipeline, instead of venting the gas into the atmosphere like the rotary valve of a traditional anti-bedsore air mattress. This not only allows for better and faster temperature regulation, but also achieves energy saving. In addition, the rotary valve drive motor 202 is a brushless DC motor, which can be set with different modes by the microcontroller 8 to achieve stepless speed regulation, making it convenient to adjust the gas conversion speed and achieve a better anti-bedsore effect with different inflation and deflation alternation speeds.

[0019] The intake and exhaust buffer tank 3 includes an intake buffer tank 301 and an exhaust buffer tank 302. The two opposing gas pipeline interfaces 208 of the gas exchange rotary valve 2 are respectively connected to the first outlet 305 and the first inlet 306 of the intake buffer tank 301 and the exhaust buffer tank 302 via pipelines. The second inlet 315 of the intake buffer tank 301 is connected to the gas interface 511 of the gas-liquid heat exchanger 5 via the air pump 7. The second outlet 316 of the exhaust buffer tank 302 is connected to the gas interface 511 of the gas-liquid heat exchanger 5 via a pipeline.

[0020] The intake buffer tank 301 and exhaust buffer tank 302 are respectively equipped with a high-pressure exhaust valve 303 and a low-pressure air replenishment valve 304. The high-pressure exhaust valve 303 includes a first mounting part 307, a valve core 308, a spring 309, and a second mounting part 310. The first mounting part 307 and the second mounting part 310 are connected together by threads. Both the first mounting part 307 and the second mounting part 310 have vent holes. The first mounting part 307 has a conical hole. The valve core 308 is fitted with a spring 309. One end of the valve core 308 is connected to the center of the inner surface of the second mounting part 310, and the other end is tightly engaged with the conical hole in the first mounting part 307 under the action of the spring 309. The low-pressure air replenishment valve 304 has the same structure as the high-pressure exhaust valve 303. The first mounting part 307 of the high-pressure exhaust valve 303 is connected to the intake buffer tank 301, and the second mounting part 310 of the low-pressure air replenishment valve 304 is connected to the exhaust buffer tank 302.

[0021] Furthermore, once the gas pressure in the air intake buffer tank 301 exceeds the rated value of the high-pressure exhaust valve 303, the high-pressure exhaust valve 303 will open to release gas, preventing excessive pressure from damaging the air pump, air mattress, and tubing. When the air inside the air mattress and tubing is insufficient, a certain negative pressure will inevitably form at the air pump intake end. Once this negative pressure reaches the rated value of the low-pressure replenishment valve 304, the valve will open to allow air intake, so that the gas inside the tubing can reach equilibrium.

[0022] The gas-liquid heat exchanger 5 includes a top cover and a housing. The housing contains multiple horizontal metal pipes 508, with both ends of the metal pipes 508 connected to the sides of the housing. Two end caps 506 are provided on the sides of the housing, and gas interfaces 511 connected to the gas pump 7 are provided on the end caps. Two circulating water pipe interfaces 507 are provided on the housing, which are connected to the circulating water pump 6 through pipes to form a circulating water circuit. Electric heating tubes 502 and evaporator cooling tubes 501 are respectively installed on the lower sides of the top cover for heating and cooling the liquid 504 in the housing. Electric heating tube terminals 509 and evaporator cooling tube interfaces 510 are respectively installed on the top cover for connecting the electric heating tubes 502 and evaporator cooling tubes 501. The electric heating tube terminals 509 are connected to the microcontroller 8, and the evaporator cooling tube interfaces 510 are connected to the refrigeration compressor 4.

[0023] Furthermore, the gas-liquid heat exchanger 5 employs a water bath method where multiple thermally conductive metal tubes 508 are immersed in liquid 504 for heat exchange, ensuring safety and stability. Heating is achieved using electric heating tubes 502, while cooling is achieved using a refrigeration compressor 4.

[0024] Temperature sensors 505 are installed on both sides of the housing of the gas-liquid heat exchanger 5.

[0025] Furthermore, the temperature sensor 505 is used to monitor the temperature of the liquid inside the gas-liquid heat exchanger 5 in real time, so that the microcontroller 8 can control the electric heating tube 502 or the refrigeration compressor 4 to work, so that the liquid inside the gas-liquid heat exchanger 5 can be kept stable near the set temperature.

[0026] The circulating water pipe interfaces 507 are located at the lower and upper parts of both sides of the housing.

[0027] Furthermore, the circulating water pump 6 continuously draws the cooling liquid 504 from the bottom of the gas-liquid heat exchanger 5 and then enters the interior of the gas-liquid heat exchanger 5 from the upper part opposite, which can make the internal liquid fully mixed, so that the temperature is uniform everywhere and accurately stabilized near the set temperature.

[0028] In practical use, when the second air belt 102 is in an inflated state and the first air belt 101 is in an vented state, the second air belt 102 is connected to the air intake buffer tank 301 through the rotary valve head 201 and is inflated under the pressure of the air pump 7; at the same time, the first air belt 101 in the vented state is connected to the exhaust buffer tank 302 through the rotary valve head 201 and is vented under the suction of the air pump 7. During the rotation of the rotary valve drive motor 202 of the gas exchange rotary valve 2, the upper plate 205 of the rotary valve is driven to rotate 360 ​​degrees through the motor shaft. During the rotation, the two gas communication slots 209 of the upper plate 205 of the rotary valve are connected to the two adjacent gas passage slots 210 in the lower plate 204 of the rotary valve in sequence. This allows the first air belt 101 and the second air belt 102 of the air mattress 1 to alternately connect with the air intake buffer tank 301 and the air exhaust buffer tank 302, continuously allowing air to enter and exit. Ultimately, this achieves the alternating inflation and deflation of the first air belt 101 and the second air belt 102, relieving pressure on different parts of the patient and achieving the effect of preventing bedsores.

[0029] During gas circulation, gas enters the metal tube 508 of the gas-liquid heat exchanger 5 through the gas interface 511. The liquid 504 inside the gas-liquid heat exchanger 5 is driven by the circulating water pump 6 to flow from the lower end of one side of the gas-liquid heat exchanger 5 to the upper end of the other side, so that the liquid cooled by the evaporator cooling tube 501 or heated by the electric heating tube 502 is mixed evenly inside the gas-liquid heat exchanger 5, so that the temperature is uniform everywhere. The microcontroller 8 collects the temperature of the liquid 504 inside the gas-liquid heat exchanger 5 in real time through the temperature sensor 505, and precisely controls the compressor refrigeration device 4 or the electric heating tube 502 to cool or heat. This cycle continues, so that the liquid temperature inside the gas-liquid heat exchanger 5 is stabilized near the set temperature. After being heated or cooled by multiple thermally conductive metal tubes 508 immersed in liquid 504, the gas is pressurized by air pump 7 and enters air inlet buffer tank 301. Meanwhile, the air belts requiring alternating inflation of the air mattress 1 are connected to air inlet buffer tank 301 via gas exchange rotary valve 2, allowing gas to enter these belts. Simultaneously, the air belts requiring alternating deflation are connected to deflation buffer tank 302 via gas exchange rotary valve 2, allowing gas from these belts to enter deflation buffer tank 302. The gas then enters gas-liquid heat exchanger 5 for heating or cooling, and this cycle repeats until the gas temperature throughout the air path reaches the set temperature, maintaining the temperature inside the air mattress near the set temperature. This significantly improves patient comfort.

[0030] Reference Figure 4-6 The high-pressure exhaust valve 303 and the low-pressure replenishing valve 304 have the same structure. When used as a high-pressure exhaust valve, the first mounting part 307 faces downward and is connected to the air intake buffer tank 301. When used as a low-pressure replenishing valve, the second mounting part 310 faces downward and is connected to the exhaust buffer tank 302. When the pressure of the gas in the air intake buffer tank 301 exceeds the rated value of the high-pressure exhaust valve 303, the pressure will push the valve core 308 upward, and the valve core 308 will separate from the conical hole in the first mounting part 307. The air passages of the first mounting part 307 and the second mounting part 310 will be connected through the vent hole, opening the exhaust and playing a safety protection role. Similarly, when the pressure in the exhaust buffer tank 302 is lower than the rated value of the low-pressure replenishing valve 304, a certain negative pressure will inevitably be formed. Once this negative pressure reaches the rated value of the low-pressure replenishing valve 304, the valve will open to intake air, and the valve core 308 will be drawn downward by the negative pressure, opening the air passage to replenish the lost gas and ensure sufficient gas in the air mattress 1 and the pipeline. When the air pressure of the intake buffer tank 301 and the exhaust buffer tank 302 is normal, the high-pressure exhaust valve 303 and the low-pressure replenishment valve 304 are reset by the spring 309, and the air circuit is closed.

[0031] This utility model is scientifically and rationally designed, and is convenient to operate and use. Compared with the prior art, it has the following advantages:

[0032] 1. It can intelligently and stably adjust the temperature inside the air mattress in real time according to the patient's needs, both cooling and heating, so that the internal temperature of the air mattress is stable near the set temperature, so that the patient is in a comfortable temperature and produces a better anti-bedsore effect.

[0033] 2. The water bath method is used for temperature control and heat exchange, which is stable and safe. It can not only increase the comfort of the people being cared for in hot and cold seasons, but also further enhance the effect of preventing bedsores.

[0034] 3. The air inside the air mattress is in an internal circulation state, without releasing gas into the atmosphere. This not only efficiently regulates temperature and inflates and deflates the mattress, but also saves energy and is environmentally friendly. Furthermore, the DC brushless motor allows for easy adjustment of the motor speed, changing the gas exchange rate and enabling the anti-bedsore air mattress to operate in multiple anti-bedsore modes, resulting in good social and economic benefits.

[0035] It should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any person skilled in the art who can make changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution shall fall within the protection scope of the present utility model.

Claims

1. A temperature-adjustable anti-bedsore air mattress system, comprising an air mattress, an air pump, and a microcontroller, wherein the air mattress (1) is composed of a plurality of first air bands (101) and second air bands (102) arranged in parallel and staggered configuration, characterized in that, The air ports of the first air belt (101) and the second air belt (102) are respectively connected to the two opposing gas pipeline interfaces (208) of the gas exchange rotary valve (2) through pipelines. The other two opposing gas pipeline interfaces (208) of the gas exchange rotary valve (2) are connected to the two air ports of the inlet and outlet buffer tank (3) through pipelines. The other two air ports of the inlet and outlet buffer tank (3) are connected to the two gas interfaces (511) of the gas-liquid heat exchanger (5) through the air pump (7), forming a circulation loop. The refrigeration compressor (4) is connected to the gas-liquid heat exchanger (5). The control terminals of the refrigeration compressor (4) and the air pump (7) are respectively connected to the microcontroller (8).

2. The adjustable temperature anti-decubitus air mattress system according to claim 1, characterized in that, The gas exchange rotary valve (2) consists of a rotary valve head (201) and a rotary valve drive motor (202) connected to the rotary valve head (201). The rotary valve head (201) includes a compression spring (203), a lower rotary valve plate (204), an upper rotary valve plate (205), and a pin (206). The lower rotary valve plate (204) has four gas pipeline interfaces (208) symmetrically arranged on its outer circumference, which are connected to the four gas passage slots (210) of the lower rotary valve plate (204). The lower rotary valve plate (204) is located above the center of the rotary valve drive motor (202). The upper rotary valve plate (205) has two gas communication ports symmetrically arranged below it. The arc length of the gas communication groove (209) is greater than that of the gas passage groove (210). The upper rotary valve plate (205) is located on the lower rotary valve plate (204). The motor shaft of the rotary valve drive motor (202) passes through the central shaft hole of the lower rotary valve plate (204) and the upper rotary valve plate (205) in sequence and is fixedly connected to the pin (206) on the upper rotary valve plate (205). A compression spring (203) is fitted on the motor shaft between the lower rotary valve plate (204) and the rotary valve drive motor (202). A fixing part (207) for fixing the lower rotary valve plate (204) is provided on the rotary valve drive motor (202).

3. The adjustable temperature anti-decubitus air mattress system according to claim 1, characterized in that, The intake and exhaust buffer tank (3) includes an intake buffer tank (301) and an exhaust buffer tank (302). The two opposing gas pipeline interfaces (208) of the gas exchange rotary valve (2) are respectively connected to the first outlet (305) and the first inlet (306) of the intake buffer tank (301) and the exhaust buffer tank (302) via pipelines. The second inlet (315) of the intake buffer tank (301) is connected to the gas interface (511) of the gas-liquid heat exchanger (5) via the air pump (7). The second outlet (316) of the exhaust buffer tank (302) is connected to the gas interface (511) of the gas-liquid heat exchanger (5) via pipeline.

4. The adjustable temperature anti-decubitus air mattress system according to claim 3, characterized in that, The intake buffer tank (301) and exhaust buffer tank (302) are respectively equipped with a high-pressure exhaust valve (303) and a low-pressure air supply valve (304). The high-pressure exhaust valve (303) includes a first mounting part (307), a valve core (308), a spring (309), and a second mounting part (310). The first mounting part (307) and the second mounting part (310) are connected together by threads. Both the first mounting part (307) and the second mounting part (310) have vent holes. The first mounting part (307) has a conical hole inside. A spring (309) is fitted on the valve core (308). One end of the valve core (308) is connected to the center of the inner surface of the second mounting part (310), and the other end is tightly connected to the tapered hole in the first mounting part (307) under the action of the spring (309). The low-pressure air supply valve (304) and the high-pressure exhaust valve (303) have the same structure. The first mounting part (307) of the high-pressure exhaust valve (303) is connected to the air intake buffer tank (301), and the second mounting part (310) of the low-pressure air supply valve (304) is connected to the exhaust buffer tank (302).

5. The temperature-adjustable anti-decubitus air mattress system according to claim 1, characterized in that, The gas-liquid heat exchanger (5) includes a top cover and a shell. The shell contains multiple horizontal metal pipes (508). The two ends of the metal pipes (508) are connected to the two sides of the shell. The two sides of the shell are provided with two end caps (506). The end caps are provided with gas interfaces (511) connected to the gas pump (7). The shell is provided with two circulating water pipe interfaces (507), which are connected to the circulating water pump (6) through pipes to form a circulating water circuit. The bottom of the top cover is provided with electric heating tubes (502) and evaporator cooling tubes (501) for heating and cooling the liquid (504) in the shell. The top cover is provided with electric heating tube terminals (509) and evaporator cooling tube interfaces (510) connected to the electric heating tubes (502) and evaporator cooling tubes (501). The electric heating tube terminals (509) are connected to the microcontroller (8), and the evaporator cooling tube interfaces (510) are connected to the refrigeration compressor (4).

6. The adjustable temperature anti-decubitus air mattress system according to claim 5, characterized in that, Temperature sensors (505) are installed on both sides of the housing of the gas-liquid heat exchanger (5).

7. The adjustable temperature anti-decubitus air mattress system according to claim 5, characterized in that, The circulating water pipe interface (507) is located at the lower and upper parts of both sides of the shell.

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