Pneumatic system of multifunctional inflatable nursing bed

Abstract

The pneumatic system of the multifunctional inflatable nursing bed includes an inflatable mattress, a compression pump, an inflating solenoid valve assembly, a return solenoid valve assembly, a deflation solenoid valve, an air replenishment solenoid valve, a heating element, a refrigeration element, and an energy conversion container. The inflatable mattress is divided into an integral mattress and a combined mattress. The combined mattress is composed of a number of air bags, and the air bags are divided into arrays. By inflating and deflating different groups of air bags, the pressure position of the patient is changed to prevent the occurrence of pressure sores. The inflating solenoid valve assembly, the return solenoid valve assembly, and the compression pump are of adjustable type, which can adjust the speed of air bag inflation and exhaust. The inflated gas is refrigerated or heated to become a temperature-adjustable air source, which can adjust the temperature of the air bag and can be used as an ice blanket or a heat blanket when necessary. When the length of the air bag is half the length of the mattress, it can meet the requirements of the patient's left and right side turning.

Description

Technical Field

[0001] The invention relates to a nursing bed, and more particularly to a pneumatic system of a multifunctional inflatable nursing bed. Background Art

[0002] Nursing beds are special equipment designed for some special groups of people. According to the different conditions of patients and their specific physical conditions, the functions of nursing beds should also be different. The main purpose of using nursing beds is to facilitate patients to move in bed, prevent the occurrence of pressure sores, and adapt to the needs of nursing. Patients who cannot take care of themselves should be able to passively carry out some body activities to change the position or pressure area of ​​the patient's body. The main purpose of using nursing beds to prevent the occurrence of pressure sores is; for patients who can perform partial autonomous movements, not only should the occurrence of pressure sores be prevented, but also some activities should be carried out in bed, such as eating, reading, etc. There are many kinds of nursing beds, and the functions are quite different, such as adjustable body position, turning over, using air cushions to change the body pressure area, manual operation or electric control, etc. There are two types in terms of the number of bed boards and the adjustment between bed boards: 1. The whole bed surface, the height (angle) between the bed boards cannot be adjusted, and only the entire bed surface can be adjusted (rotated); 2. The segmented bed surface, the bed board is composed of several boards, and the height (angle) between the bed boards can be adjusted. Mattresses are divided into general mattresses and inflatable mattresses; inflatable mattresses are divided into integral airbag mattresses and combined airbag mattresses.

[0003] The air mattresses currently used all use compressed air to directly inflate the airbags. In the summer, when the temperature is high, due to the characteristics of the air mattress materials and the needs of use, the patient will feel hot when lying on the air mattress, and the parts in contact with the air mattress will often sweat; in the winter, when the temperature is low, the temperature of the air filled is also relatively low, and the patient's thermal insulation effect is poor. Therefore, when using an air mattress, there is a phenomenon of unsatisfactory inflation temperature regulation, which cannot meet the needs of users. Summary of the invention

[0004] For patients who are completely unable to take care of themselves, their activities all depend on the care of others. It is very important to prevent the occurrence of pressure sores. In addition to changing the body position, an important measure to prevent the occurrence of pressure sores is to frequently change the pressure-bearing parts to reduce the pressure time. Use an inflatable cushion, divide the airbags in the inflatable cushion into two or more groups, and inflate and deflate different airbag components to achieve the purpose of changing the pressure-bearing parts of the body. The more airbag components, the better the effect, but the structure and control are more complicated. At the same time, the inflatable mattress can only be adjusted on one plane. If the airbags are used in groups and combined with the changes in the bed surface, the effect will be more reliable.

[0005] In order to meet the need of regulating the temperature of the airbag, the compressed gas used for inflation is replaced with a temperature-adjustable gas that has been heated or cooled to inflate the airbag, thereby achieving temperature regulation of the air mattress. In order to reduce the temperature difference between the air inlet and the air outlet of the airbag, feedback can be used to adjust the opening of the solenoid valve or the inflation speed of the compression pump.

[0006] The multifunctional inflatable nursing bed is mainly designed for patients who are completely unable to take care of themselves, and takes into account the nursing needs of different patients. The multifunctional inflatable nursing bed includes a bed frame, a body position adjustment system, a pneumatic system, a control system, and accessories.

[0007] The pneumatic system of the multifunctional inflatable nursing bed includes an inflatable mattress, a compression pump, an inflating solenoid valve assembly, a return solenoid valve assembly, a deflation solenoid valve, an air supply solenoid valve, a heating element, a refrigeration element, and an energy conversion container. The heating element and the refrigeration element are installed in the energy conversion container, and the inflating solenoid valve assembly and the deflation solenoid valve are installed outside the energy conversion container; the return solenoid valve assembly and the air supply solenoid valve are installed at the air inlet end of the compression pump, and the air outlet end of the compression pump is connected to the energy conversion container; the air inlet pipe of the inflatable mattress is connected to the inflating solenoid valve assembly, and the air outlet pipe of the inflatable mattress is connected to the return solenoid valve assembly. The inflating solenoid valve assembly, the return solenoid valve assembly and the compression pump are of adjustable type. The inflatable mattress is divided into an integral mattress and a combined mattress. The combined mattress is composed of a number of air bags, and the air bags are divided into arrays. The number of solenoid valves of the inflating solenoid valve assembly and the return solenoid valve assembly depends on the number of groups into which the air bags are divided. The pressure detector and the temperature detector are installed in the energy conversion container, or in the inflating pipe, the return pipe, and the air bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0009] Figure 1 It is a structural schematic diagram of the present invention.

[0010] In the figure: 1. Inflatable mattress; 2. Inflation solenoid valve assembly; 3. Return air solenoid valve assembly; 4. Air supply solenoid valve; 5. Compression pump; 6. Deflation valve; 7. Heating element; 8. Transducer container; 9. Refrigeration element; 10. Air pipe. DETAILED DESCRIPTION

[0011] Some patients use nursing beds for a short time, while others need a long time; some patients cannot move independently, while others can move partially independently; some patients are seriously ill, while others are mildly ill, and others need special care. Nursing beds are used in hospitals, where the external conditions are relatively good, the users are uncertain, and many functions are required; inflatable nursing beds are designed to meet the different needs of different patients, and are divided into a variety of different functions, which can be selectively combined according to needs. The mattress of the nursing bed can be an ordinary soft mattress or an inflatable mattress (integral airbag or combined airbag); the inflation air source is divided into a general air source and an energy conversion air source, and the control method can be wired or wireless.

[0012] The pneumatic system of the multifunctional inflatable nursing bed is mainly a carrier for changing the pressure parts of the patient's body when lying flat. In order to overcome the shortcomings of the existing inflatable mattresses, gas with suitable temperature is used as the gas source for inflating the airbag. The pneumatic system of the multifunctional inflatable nursing bed includes an inflatable mattress, a compression pump, an inflating solenoid valve assembly, a return air solenoid valve assembly, a deflation solenoid valve, an air replenishment solenoid valve, a heating element, a cooling element, and an energy conversion container.

[0013] The structure of the inflatable mattress is divided into two categories: 1. The whole airbag cushion, the whole mattress is a large airbag; 2. The combined airbag cushion, the mattress is composed of several small airbags. In the combined airbag mattress, several small airbags can be divided into arrays according to needs, and different combinations are adopted for inflation and deflation. The length of the small airbag can be the width of the mattress. This mattress is generally used in a whole board bed and a four-board bed; in a two-board bed and an eight-board combined bed, the length of the small airbag is half the width of the mattress, and the mattress is divided into two left and right areas. This mattress does not affect the flow of airbag inflation and return air when the patient turns left or right. The more groups the airbags of the mattress are divided into, the stronger the nursing function is, but the more inflation tubes, return air tubes and control components are required, the more complicated the processing is, so from a practical point of view, it is appropriate to divide it into 2 to 4 groups.

[0014] In order to provide the mattress with gas of suitable temperature and pressure, it can be used as an ice blanket or heat blanket when necessary. The transducer container is used as a gas buffer to heat or cool the gas. The transducer container is used as a storage container for compressed gas. Heating elements and cooling elements are installed in the transducer container. The gas in the container is pre-temperature adjusted according to actual needs to reach the set temperature. The return gas solenoid valve assembly and the air supply solenoid valve are installed at the air inlet end of the compression pump. The transducer container is connected to the air outlet end of the compression pump, and the inflation solenoid valve assembly and the deflation solenoid valve are installed on the transducer container. The compression pump sucks gas from the return gas solenoid valve assembly and the air supply solenoid valve, and inputs compressed gas into the transducer container; the compressed gas in the transducer container is directly heated or cooled by the heating element or the cooling element. A certain amount of water can be added to the transducer container, and the heating element and the cooling element are below the water level. The water is used as an intermediate medium to generate hot gas or cold gas, so that the gas in the transducer container maintains a stable pressure and temperature. If the temperature is adjusted by water, it is also necessary to install an inlet valve, a drain valve, a water level detection probe and other components on the transducer container. The temperature-adjusted compressed gas in the transducer container is discharged by the inflation solenoid valve assembly and the deflation solenoid valve. The inflation solenoid valve assembly is connected to one end of the airbag of the inflatable mattress (the air inlet of the airbag) through the air pipe to send the gas in the transducer container into the airbag; the return air solenoid valve assembly is connected to the other end of the airbag of the inflatable mattress (the air outlet of the airbag) through the air pipe to pump the gas in the airbag back to the transducer container by the compression pump. Under normal circumstances, the gas circulates in the transducer container and the airbag. When the gas pressure in the transducer container is greater than the set pressure, the excess gas in the transducer container is discharged through the deflation solenoid valve; when the gas pressure in the transducer container is less than the set pressure, the gas supply solenoid valve will replenish the transducer container with gas to make the container reach the set pressure. The air supply solenoid valve and the air release solenoid valve are used to adjust the gas volume (pressure) and set pressure in the energy conversion container. They basically do not work in normal operation, and the gas circulates in a sealed environment. When it is first used, there is no gas in the container and the air bag, and a large amount of gas needs to be filled. If the diameter of the air supply solenoid valve is small, a special air intake valve (manual valve can be used) can be added to speed up the air intake speed. When it is stopped, the gas in the energy conversion container and the air bag needs to be completely exhausted, and the air release solenoid valve is used, or another air release valve (manual valve can be used) can be added to speed up the exhaust speed.

[0015] In order to reduce the temperature difference between the airbag inlet and outlet and maintain the temperature balance of the entire airbag cushion, especially when the airbag pressure reaches the set pressure and the pressure in the airbag is equal to the pressure in the transducer container, the inflation solenoid valve is closed and the gas stops flowing, and the temperature of the airbag may have a large difference. In order to ensure the stability of the temperature of the inflatable mattress, the solenoid valves in the inflation solenoid valve assembly and the return air solenoid valve assembly are selected with adjustable opening size solenoid valves, and the compression pump is selected with adjustable speed compression pump. A temperature detector is set at the return air end to detect the temperature of the return air, and the temperature of the return air is compared with the set temperature; using feedback technology, according to the difference between the temperature at the return air end and the set temperature, the opening of the solenoid valve or (and) the speed of the compression pump is adjusted to adjust the inflation (return air) speed, so as to achieve the temperature difference of the airbag cushion, that is, when the airbag pressure reaches equilibrium with the pressure in the transducer container, the compression pump is still working, and the inflation solenoid valve and the return air solenoid valve are opened at the same time, so that the gas in the airbag flows at a certain speed to maintain the temperature of the airbag cushion stable.

Claims

1. A pneumatic system for a multifunctional inflatable nursing bed, characterized in that: It includes an inflatable mattress, a compression pump, an inflation solenoid valve assembly, an air return solenoid valve assembly, an air release solenoid valve, an air supply solenoid valve, a heating element, a refrigeration element, a transducer container pressure detector, and a temperature detector; the heating element and the refrigeration element are installed in the transducer container, and the inflation solenoid valve assembly and the air release solenoid valve are installed outside the transducer container; the air return solenoid valve assembly and the air supply solenoid valve are installed at the air inlet end of the compression pump, and the air outlet end of the compression pump is connected to the transducer container; the air inlet pipe of the inflatable mattress is connected to the inflation solenoid valve assembly, and the air outlet pipe of the inflatable mattress is connected to the air return solenoid valve assembly; the inflation solenoid valve assembly, the air return solenoid valve assembly and The compression pump is of adjustable type; the inflatable mattress is divided into an integral mattress and a combined mattress; the integral airbag cushion is a large airbag, and the combined mattress is composed of a number of small airbags, which are divided into arrays. The length of the small airbag is half the width of the mattress, dividing the mattress into two left and right areas; the number of solenoid valves in the inflation solenoid valve assembly and the return air solenoid valve assembly is determined according to the number of groups the small airbags are divided into, and the pressure detector and the temperature detector are installed in the transducer container, or in the inflation pipe, the return air pipe, and the airbag. When the compression pump is working, the inflation solenoid valve and the return air solenoid valve are opened at the same time, and the gas in the airbag flows at a certain speed.

Images