KR102342427B1 - Massage therapy function, human body pressure distribution function and working noise reduction function have medical alternating pressure air mattress device - Google Patents

Abstract

The present invention relates to a medical alternating floating mattress device having a massage therapy function, a body pressure distribution function, and an action noise reducing function. Provided is a medical alternating floating mattress device having a massage therapy function, a body pressure distribution function, and an action noise reducing function, which provides a bedsore, provides a massage therapy function by changing body pressure application parts, lowers body pressure applied to an unit body area by increasing an air pad part surface in contact with a human body when sleeping or taking a rest, and dispersing the body pressure applied to the unit body area, and greatly reduces action noise.

Description

A medical alternating-float mattress device having a massage healing function, a body pressure distribution function, and an operation noise reduction function {Massage therapy function, human body pressure distribution function and working noise reduction function have medical alternating pressure air mattress device}

The present invention relates to an air mattress device for preventing bedsores, and more particularly, massage healing effects and body pressure distribution that are 5 to 7 times the price of a conventional air mattress for preventing pressure sores, which the conventional air mattresses for preventing pressure sores could not provide. It relates to a high-end medical shift flotation mattress device that provides high value-added functions for noise reduction and noise reduction at a low price.

As with paralyzed patients, bedridden patients, who are unable to move on their own, spend most of their day lying down, relying on the help of caregivers to live. However, in a patient who has been lying for a long time, excessive pressure due to local weight is continuously applied to the part in contact with the floor, such as the back or buttocks, and the capillary occlusion state continues, so that blood does not pass through the skin tissue and the skin tissue is necrotic. pressure sores may occur. Bedsores inflict great pain on patients and significantly reduce their quality of life, and once they develop, it is difficult to recover, the recovery rate is slow, and the wounds are easily exacerbated, resulting in great economic loss in treatment.

The conventional medical shift floatation mattress device for preventing bedsores has to replace the components with expensive parts to provide a massage healing function, body pressure distribution, and noise reduction functions, and it is When a function to maintain and control pressure is added, the product price not only increases significantly from 5 to 7 times the price of a conventional medical shift floatation mattress device for simple pressure ulcer prevention, but also has a problem in that the configuration and device structure become very complicated.

The object of the present invention to solve the above-described problem is as follows.

First, while providing a shift flotation mattress, it effectively provides a massage healing function, and a medical shift flotation with a massage healing function, body pressure distribution function, and operation noise reduction function that can effectively reduce the noise that may be generated by the operation of the air pump. It is intended to provide a mattress device.

Second, it is intended to provide a medical mattress device that can effectively prevent bedsores that may occur in patients who lie in bed for a long time with a simple and low unit cost configuration.

In other words, it is necessary to provide comfortable rest and sleep with massage healing effect, body pressure distribution, and low motion noise as well as prevention of pressure sores by alternating floating for a patient who has been lying in bed for a long period of time. The price of an air mattress for preventing pressure ulcers with a function corresponds to 5 to 7 times the price of a conventional medical pressure ulcer prevention air mattress, which is provided at a price that is 1.5 times lower.

A feature of the present invention for solving the above-described problems is that the odd-numbered air tubes 110 and the even-numbered air tubes 120 are alternately arranged side by side to form the air pad part 100 and the odd-numbered air tubes ( 110) are connected to the odd-numbered valve 112 through the odd-numbered connection tube 111, the even-numbered air tubes 120 are connected to the even-numbered valve 122 through the even-numbered connection tube 121, and the air controller 200 is An odd-numbered valve 112 for opening and closing the odd-numbered connection tube 111, an even-numbered valve 122 for opening and closing the even-numbered connection tube 121, and an air pump 400 in which the amount of electricity supplied is controlled by a pulse width modulation control method are provided. The internal connection tube 140, which is an air passage connecting the valve 112, the even-numbered valve 122, and the differential pressure sensor 560, and the air inlet 410, connect or block the internal connection tube 140 to the internal connection tube 140. (412), the inlet external connection valve 411 for connecting or blocking the air inlet 410 to the external air outlet 401, and the inside of the outlet for connecting or blocking the air outlet 420 to the internal connection tube 140 The connecting valve 422 and the outlet connecting or blocking the air outlet 420 to the external air outlet 401 The outlet connecting or blocking the external connecting valve 421 and the air outlet 420 to the internal connecting tube 140 It may include an internal connection valve 422 , a controller 500 for controlling the valves 112 , 122 , 411 , 412 , 421 , 422 , and an input/output device 600 .

In addition, when the control unit 500 receives an alternate levitation command from the input/output device 600 and performs an alternate levitation operation, when the odd-numbered air tubes 110 are to be expanded, the odd-numbered valve 112 is opened and the even-numbered valve 122 is opened. ), close the inlet internal connection valve 412, open the inlet external connection valve 411, open the outlet internal connection valve 422, close the outlet external connection valve 421, and operate the air pump 400 to connect the suction port externally Air is sucked into the air pump 400 from the outside through the valve 411 , and the air sucked into the air pump 400 is the outlet internal connection valve 422 , the internal connection tube 140 , the odd number valve 112 , and the odd number The air is injected into the odd-numbered air tubes 110 via the connection tube 111 , and the air pressure measured by the differential pressure sensor 560 of the internal connection tube 140 is preset to the input/output device 600 . If it is equal to or greater than the pressure value to stop the injection, the air pump 400 stops driving and closes the odd-numbered valve 112 to end the expansion of the odd-numbered air tubes 110 in the alternating flotation.

And when the contraction operation of the odd-numbered air tubes 110 is performed after the lapse of the preset alternate flotation cycle time, the odd-numbered valve 112 is opened, the even-numbered valve 122 is closed, the inlet internal connection valve 412 is opened, and the inlet external connection valve is opened. After closing (411), closing the outlet internal connection valve 422, and opening the outlet external connection valve 421, the air pump 400 so that the air inside the air pump 400 is discharged to the outside through the outlet external connection valve 421. 400) is driven to generate negative pressure in the air pump 400, and in the initial stage when the odd-numbered air tubes 110 are converted from the expanded state to the contracted state, the odd-numbered air tubes 110 that have inflated the odd-numbered air tubes 110. Positive pressure generated by the air reaching the air pump 400 via the odd-numbered connection tube 111, the odd-numbered valve 112, the internal connection tube 140, and the inlet internal connection valve 412 by the air pressure in the field The air pump 400 is in a state where the air pressure of the odd-numbered air tubes 110 is lowered to about the first reference pressure as time elapses while the positive pressure is maintained in the air pump 400 because it is greater than the negative pressure generated by the driving of the air pump 400 . ) is greater than the positive pressure generated by the air reaching the air pump 400 by the air pressure of the odd-numbered air tubes 110, so that the negative pressure caused by the driving of the air pump 400 becomes the negative pressure of the odd-numbered air tube. The air pump 400 is driven and stopped until the air pressure inside the odd-numbered air tubes 110 becomes the second reference pressure by forcibly discharging the residual air of the 110, and the odd-numbered air tubes 110 are produced. 2 It is desirable to make it a contracted state in which the reference pressure is maintained.

And when the control unit 500 receives a continuous low pressure command from the input/output device 600, the odd valve 112 and the even valve 122 are opened, the inlet internal connection valve 412 is opened, and the inlet external connection is made. Close the valve 411, open the outlet internal connection valve 422, and close the outlet external connection valve 421 so that the air in the odd-numbered air tubes 110 moves with the odd-numbered connection tube 111 and the odd-numbered valve 112 and the inside connection tube 140 and The even-numbered valve 122 and the even-numbered connection tube 121 are made to circulate with the air in the even-numbered air tubes 120 via the even-numbered connection tube 121 , and the air pressure of the internal connection tube 140 is measured with the differential pressure sensor 560 . Thus, when the air pressure is higher than the third reference pressure, the outlet internal connection valve 422 is closed, the outlet external connection valve 421 is opened, and the air pump 400 is driven to remove the air in the air pump 400 from the outlet external connection valve ( 421), negative pressure is generated in the air pump 400, and the inlet internal connection valve 412, the internal connection tube 140, and the odd valve 112 by the negative pressure generated in the air pump 400 ), the odd-numbered connecting tube 111, the even-numbered valve 122 and the even-numbered connecting tube 121 are transmitted to the odd-numbered air tubes 110 and the even-numbered air tubes 120 through the odd-numbered air tube 110 ) and the air of the even-numbered air tubes 120 are discharged to the outside due to negative pressure, so that the air pressure of the odd-numbered air tubes 121 and the even-numbered air tubes 120 is lowered. It is measured with the differential pressure sensor 560, and when the measured value is equal to or smaller than the third reference pressure, the air pump is stopped, the outlet internal connection valve 422 is opened, and the outlet external connection valve 421 is changed to close the even numbered number. The air pressure of the air tubes 120 and the odd-numbered air tubes 110 and the internal connection tube 140 is maintained as a third reference pressure, and the air pressure of the internal connection tube 140 is measured by a differential pressure sensor 560 . When the air pressure is lower than the third reference pressure, close the inlet internal connection valve 412, open the inlet external connection valve 411, open the outlet internal connection valve 422, By driving the air pump 400, external air enters the air pump 400 through the inlet external connection valve 411, and the air that enters the air pump 400 flows into the outlet internal connection valve 422, the internal connection tube ( 140), the odd valve 112, the odd connection tube 111, the even valve 122 and the even connection tube 121 are supplied to the odd-numbered air tubes 110 and the even-numbered air tubes 120. air pressure will increase When the air pressure value of the internal connection tube 140 measured by the differential pressure sensor 560 is equal to or greater than the third reference pressure, the operation of the air pump 400 may be stopped.

Then, by opening the outlet internal connection valve 422 and closing the outlet external connection valve 421, the internal connection tube 140, the odd-numbered air tubes 110, and the even-numbered air tubes 120 are filled with the third reference pressure. The air pressure is maintained, and the air pressure of the internal connection tube 140 is periodically measured with the differential pressure sensor 560. Due to the air leakage minutely generated in the air pad unit 100 and the air controller 200, time elapses. After that, when the air pressure of the internal connection tube 140, which was the third reference pressure, is lowered to the first reference pressure, close the inlet internal connection valve 412, open the inlet external connection valve 411, and the outlet internal connection valve 422 ), close the outlet external connection valve 421 and drive the air pump 400 so that external air enters the air pump 400 through the inlet external connection valve 422, and the air that enters the air pump 400 is the odd-numbered air tube 110 via the outlet internal connection valve 422, the internal connection tube 140, the odd-numbered valve 112, the odd-numbered connection tube 111, the even-numbered valve 122, and the even-numbered connection tube 121 ) and the even-numbered air tubes 120 and when the air pressure measured in the internal connection tube 140 increases to the third reference pressure, the air pump 400 is stopped and the inlet internal connection valve 412 is closed. By repeating the operation of opening and closing the inlet external connection valve 411 so that the internal connection tube 140 is filled and maintained with the third reference pressure every time the air pressure of the internal connection tube 140 drops to the first reference pressure, the internal connection The air pressure of the tube 140 is below the third reference pressure and maintains a continuous low pressure state that is equal to or higher than the first reference pressure,

When the control unit 500 executes the continuous low pressure command, the operation noise may be reduced by driving the air pump 400 using a pulse width modulation control method in which an air pressure equal to or less than the fourth reference pressure is generated.

Here, the pulse width modulation control method may be to use a zero-cross pulse width modulation method in which the pulse width is adjusted and controlled at the reference point of the 0 (V) voltage in the pulse of the AC electricity supplied to the air pump.

In addition, it is preferable that the first reference pressure uses 25 mmhg, the second reference pressure preferably uses 10 mmhg, the third reference pressure uses 27 mmhg, and the fourth reference pressure uses 35 mmhg.

In addition, the control unit 500 includes a differential pressure sensor 560 for detecting the air pressure of the internal connection tube 140 and an initial value adjusting circuit 561 for calibrating the initial values of the differential pressure sensor 560, and the differential pressure It is preferable to include a noise removal filter 562 for removing noise generated by the sensor 560 and a low noise amplifier circuit 563 for amplifying the signal detected by the differential pressure sensor.

In addition, in place of the inlet internal connection valve 412 and the inlet external connection valve 411, two air openings and closing ports that are closed when one side is opened with a solenoid with 3 ports 2 are connected to the inlet internal connection valve 412 and the inlet external connection valve ( 411), it is preferable to connect the always open air opening and closing port to the air outlet 420 and use it.

In the present invention, an air pump forcibly injecting air into the odd-numbered air tubes 110 in order to inflate the odd-numbered air tubes 110 and the odd-numbered air tubes 110 to contract the odd-numbered air tubes 110 Instead of using each air pump for forcibly discharging the residual air in the While using low-cost parts that allow leakage without using very expensive parts that do not leak air, the differential pressure sensor measures the air pressure and, if it is out of the allowable pressure range, it is a technology that injects or exhausts air to make continuous low-pressure operation. It does not use an expensive ultra-low-noise air pump, but uses a low-priced, low-noise air pump. When low noise is required, the operating noise is a very low-noise pulse width modulation that generates a low pressure according to the fourth pressure standard. An initial value control circuit 561 that calibrates the initial values of the low-cost differential pressure sensor 560 and the differential pressure sensor 560 without using a differential pressure sensor, and noise that removes noise generated by the differential pressure sensor 560 By using the removal filter 562 and the low noise amplification circuit 563 that amplifies the signal detected by the differential pressure sensor, the massage healing effect, body pressure distribution, and low operating noise equivalent to 5 to 7 times the price of the conventional medical pressure ulcer prevention air mattress It is characterized in that the price of an air mattress for preventing pressure ulcers having a function is provided at a price about 1.5 times lower than the price of a conventional air mattress for preventing pressure ulcers for medical use.

Effects of the present invention for solving the above-described problems are as follows.

First, in addition to the function of preventing pressure sores that can occur when a part of the body is continuously subjected to body pressure provided by the conventional medical shift-floating air mattress, it provides a massage healing function by changing the part to which body pressure is applied, and sleep or By increasing the surface of the air pad that closes to the body at rest to disperse the body pressure per unit area of the body and lowering the body pressure per unit area to about 25mmhg, it provides comfort to the patient and greatly reduces the operation noise of the air mattress when sleeping or resting. To provide a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a function of reducing motion noise.

Second, the high-level massage healing function, body pressure distribution function and operation noise that is 5 to 7 times the price of the conventional medical shift flotation air mattress with a low unit price through efficient control of the valve and air pump that control the opening and closing of the air flow path To provide a medical shift floatation mattress device with a price of 1.5 times the price of a conventional medical shift floatation air mattress having a reduction function.

1 is a view showing a connection configuration of a conventional medical shift floating mattress device.
Figure 2 is a schematic diagram showing the actual shift lifting operation of the medical shift flotation mattress device without a conventional massage healing function.
3 is a schematic diagram illustrating the operation of a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention.
Figure 4 is a view showing another configuration of the conventional medical shift floating mattress device.
5 is a view showing the block configuration of the air controller applied to the conventional medical shift flotation mattress device.
Figure 6 is a state schematic diagram of the body pressure distribution continuous low pressure operation of the conventional medical shift floatation mattress device.
7 is a schematic diagram of a continuous low pressure operating state of dispersing body pressure of a medical shift flotation mattress device having a massage healing function, a body pressure dispersing function, and a noise reduction function according to an embodiment of the present invention.
8 is a graph showing driving pulses of an air pump to which a pulse width modulation method for controlling air pressure and noise of an air pump according to an embodiment of the present invention is applied.
9 is a graph showing a driving pulse to which a zero cross pulse width modulation method according to an embodiment of the present invention is applied.
10 is a view showing the overall configuration of the medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention and the flow of air injection into the air pad unit.
11 is a view showing the overall configuration of a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention and the flow of discharging air from the air pad unit.
12 is a diagram showing the block configuration of a control unit applied to a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the invention may be sufficiently conveyed to those skilled in the art. Like reference numbers refer to like elements throughout.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

1 is a view showing a connection configuration of a conventional medical shift floating mattress device. As shown in Figure 1, the conventional alternating floating mattress device, a plurality of air tubes (110, 120) are arranged side by side, the air pad unit 100 to form a bed mat; a plurality of air connection tubes (111, 121) for independently injecting and discharging air to one side of each of the air tubes (110, 120); and an air controller 200 connected to the air connection tubes 111 and 121 .

Figure 2 is a schematic diagram showing the actual shift lifting operation of the medical shift flotation mattress device without a conventional massage healing function.

(A) of Figure 2 shows a state in which the odd-numbered air tubes 110 of the medical alternating floatation mattress device without a conventional massage healing function are in an expanded state and the even-numbered air tubes 120 are in a contracted state, B) shows the state in which the odd-numbered air tubes 110 are in a contracted state and the even-numbered air tubes 120 are in an expanded state. As shown in (A) of Figure 2, the actual alternating flotation operation of the medical shift flotation mattress device without a conventional massage healing function is the height at which residual air remains in the contracted even-numbered air tubes 120 and the expanded odd number The even-numbered air tube 120 shrunk due to a small difference in height between the odd-numbered air tubes 110 that were deformed by being pressed down by the weight because they could not support the weight of the patient 10 lying on the number-of-air tubes 110 . Part of the weight of the patient 10 lying on the field is also carried.

Although it is smaller than 32mmhg, which is smaller than 32mmhg where the pressure sores are caused by the constricted even-numbered air tubes 120, the body pressure of about 25mmhg is generated, so there is a pressure sore prevention effect, but the massage healing effect does not appear much. In the case of FIG. 2 (B) performing an operation alternating with (A) of FIG. 2, there is a pressure sore prevention effect, but there is a problem that the massage healing effect does not appear significantly.

In order to solve this problem, in the embodiment of the present invention, unlike the operation of the medical shift floatation mattress device without the conventional massage healing function illustrated in FIG. A medical shift with a massage healing function, a body pressure distribution function, and a noise reduction function that can provide a massage healing effect by a clear difference in height between the expanded and contracted tubes as well as a pressure sore prevention effect by alternately operating the expansion and contraction of the tube It becomes possible to provide a flotation mattress device.

3 is a schematic diagram illustrating the operation of a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention. Figure 3 (A) shows the state in which the odd-numbered air tubes 110 are inflated and the even-numbered air tubes 120 are contracted, and Fig. 3 (B) is the state in which the odd-numbered air tubes 110 are contracted. state and the even-numbered air tubes 120 represent an expanded state.

As shown in (A) of Figure 3, the operation of the medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention is an inflated odd-numbered air tube (110) Although there is some deformation by the weight of the patient 10 lying on it, the even-numbered air tubes 120 that support the weight and the contracted even-numbered air tubes 120 hardly receive the weight of the patient 10 lying on the bed. The body contact pressure of the even-numbered air tubes 120 due to the body weight is generated as low as 10 mmhg.

When a predetermined time has elapsed in FIG. 3(A) and it is changed to FIG. 3(B), the area receiving the body pressure for the body weight of the lying patient 10 is from the odd-numbered air tubes 110 to the even-numbered air tubes ( 120), and when it is changed to (A) of FIG. 3 after a predetermined time elapses, the area receiving the body pressure for the body weight of the lying patient 10 is from the even-numbered air tubes 120 to the odd-numbered air tubes 110 ) to become alternate flotation, preventing pressure sores caused by shift flotation, and providing a massage healing effect.

Figure 4 is a view showing another configuration of the conventional medical shift floating mattress device.

The mattress device shown in FIG. 1 alternately injects and discharges air into and out of the air tube through the even-numbered channel and the odd-numbered channel, so that the odd-numbered and even-numbered air tubes alternately inflate and contract each other to lie on the mattress. Although the configuration provides a conventional medical shift floatation mattress device having a function to prevent bedsores in patients, the embodiment of FIG. 4 is a conventional medical shift floatation mattress that alternately performs air injection and exhaust operations through three channels Shows the configuration of the device.

As shown in FIG. 4 , the plurality of channels is characterized as three channels consisting of 1+3k, 2+3k, and 3+3k air tubes and air connecting tubes that are each independently connected, where k may be an integer from 0 to 6. The maximum value of k may vary depending on the number of air tubes.

That is, using the 1+3k-th air tubes 131 , the 2+3k-th air tubes 132 , and the 3+3k-th air tubes 133 , these are sequentially expanded and contracted on the air pad unit 100 . It is a configuration that can change the body pressure point applied to the skin of a lying patient, and one channel injects air to inflate the air tubes of the corresponding channel, and discharges the air of the air tube of the other channel to contract it. Rather, it is also possible to perform the operation of the floating mattress in such a way that the air tube of the two channels can be inflated and the other one can be contracted. This method of increasing the number of channels is also possible in the present invention, and in the context of the present invention, the invention cannot be different from the present invention by changing the number of channels.

5 is a view showing the block configuration of the air controller applied to the conventional medical shift flotation mattress device. The air controller 200 shown in FIG. 5 exemplifies the air controller 200 applied to the embodiment of FIG. 1 . The air controller 200 is an access control valve that is connected to the air connection tubes 111 and 121 to control the entry and exit of air, and may include an odd valve 112 and an even valve 122, and the odd connection tube ( 111), an odd valve 112 to open and close, an even valve 122 to open and close the even connection tube 121, and a release valve 150 and an air pump ( 400), a control unit 500, and an input/output device 500 that receives a user's command and displays an operation state or execution result. Here, the control unit 400 is a valve that blocks and controls the air flow of the air pump 400 that drives the air pump for injecting or discharging air and the internal connection tube 140 leading to the air connection tubes 111 and 121 . may be configured as a control unit 400 for controlling the opening/closing operation of the .

Figure 6 is a state schematic diagram of the state of the body pressure distribution continuous low pressure operation of the conventional medical shift floating mattress device. As shown in Figure 6, the actual body pressure distribution and continuous low pressure operation of the conventional medical shift floatation mattress device has a small degree of concave entry by the body pressure of the patient 10 lying on the air pad part 100, in particular, the body pressure There is a problem that pressure ulcers may be generated in the shoulders 12 and hips 13 where the pressure applied to the skin by the air pad unit 100 is higher than 32 mmhg.

7 is a schematic diagram of a continuous low pressure operating state of dispersing body pressure of a medical shift flotation mattress device having a massage healing function, a body pressure dispersing function, and a noise reduction function according to an embodiment of the present invention. As shown in FIG. 7 , the weight of the patient 10 lying on the air pad unit 100 is applied, the air pad unit 100 enters concavely, and the air pad unit 100 closes the shoulder 12 and hip 13 parts. ) It can be seen that the degree of concave entry is deeper than the example of FIG. 6 .

In addition, the reason that the head 11 is not recessed in FIG. 7 is that the pressure of the air pad of the head 11 is not lowered even during continuous low pressure operation, and the patient lying on the air pad 100 As the body pressure of (10) is concave, the body pressure is dispersed, and the pressure applied to the skin by contacting the air pad unit 100 due to the body pressure is lower than the fourth reference pressure, which is the blood flow pressure of the capillaries, to treat the pressure sore. It has a preventable effect. It is preferable that the third reference pressure be 27mmhg, and the fourth reference pressure be 32mmhg.

8 is a graph showing driving pulses of an air pump to which a pulse width modulation method for controlling air pressure and noise of an air pump according to an embodiment of the present invention is applied.

The air pump is a device for sucking or discharging air by driving a motor, and there is a problem in that noise is generated by driving the motor. In order to solve such a problem, an effective method for reducing noise through a pulse width modulation method of AC electricity supplied to an air pump is proposed in an embodiment of the present invention.

Here, pulse width modulation (PWM) refers to a method of changing the equivalent voltage by changing the output time of the pulse-phase voltage without changing the magnitude of the smoothed DC voltage. The method of sequentially converting the widths of output pulses so that the current flowing through the motor approaches a sine wave is also called sine wave PWM.

As shown in FIG. 8A , when there is a hatched pulse width 55, driving AC electricity is supplied to the air pump, and when there is no hatched pulse, driving AC electricity is not supplied to the air pump. Therefore, if the hatched pulse width 55 is widened, the amount of supplied AC electricity is increased, the air pressure and the amount of air of the air pump are increased, and the operation noise is increased. Therefore, in the embodiment of the present invention, if the hatched pulse width 55 is reduced as shown in (B) of FIG. 8 , the amount of supplied AC electricity is reduced, the air pressure and the amount of air of the air pump are reduced, and the effect of reducing the operating noise can be obtained. have.

9 is a graph illustrating a driving pulse to which a zero cross pulse width modulation method according to an embodiment of the present invention is applied. As shown in FIG. 9, when there is a hatched pulse width 55, driving AC electricity is supplied to the air pump 400 and AC driving AC is driven to the air pump based on the point 56 at which the AC power is 0 volts (V). By supplying the voltage selectively, the operating current having a higher uniformity than the method illustrated in FIG. 8 is supplied, so that the uniformity of the air pressure and the amount of air generated by driving the air pump 400 is increased, and the uniformity of the operating noise is also increased. can get

10 is a view showing the overall configuration of the medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention and the flow of injecting air into the air pad unit. As shown in FIG. 10 , the air connection tubes 111 and 121 composed of a plurality of channels are connected to the air controller 200 in the air pad part on which the patient is lying. Here, the dotted line indicates the air flow in the flow path in the air controller 200 for injecting air into the odd-numbered air tube 110 through the odd-numbered connection tube 111 as a dotted line and an arrow.

The air controller 200 includes an odd valve 112 that opens and closes the odd connection tube 111 as a normally closed solenoid air valve, and an even valve 122 that opens and closes the even connection tube 121 as a normally closed solenoid air valve, and a user The input/output device 600 , the control unit 500 , the odd valve 112 and the even valve 122 , the differential pressure sensor 560 in the control unit 500 , the air inlet valve unit 415 and the air outlet valve unit 425 . ), the air pump 400 that controls the supply AC electricity by the pulse width modulation method or the zero-cross pulse width modulation control method, and the air intake valve part of the air intake port 410 It is located in 415 and connects or blocks the air inlet 410 to the internal connection tube 140. The inlet internal connection valve 412 and the air inlet 410 are connected to or blocked by the external air outlet 401. The valve 411 is in the air outlet valve part 425 of the air outlet 420 and connects or blocks the air outlet 420 to the inner connecting tube 140. The outlet internal connection valve 422 and the air outlet 420 It may be configured to include an outlet external connection valve 421 for connecting or blocking the external air outlet (401).

As shown in FIG. 10, looking at the operation of forcibly injecting air into the odd-numbered air tubes 110, first, the even-numbered valve 122 is closed, the odd-numbered valve 112 and the outlet internal connection valve 422 are opened. , after closing the outlet external connection valve 421 and the inlet internal connection valve 412 , the air pump 400 is driven. When the air pump 400 is driven, air is sucked from the external air outlet 401 to the air pump 400 through the inlet external connection valve 411, and the air sucked into the air pump 400 is the outlet internal connection valve 422 ) is forcibly injected into the odd-numbered air tubes 110 connected to the odd-numbered connection tube 111 via the internal connection tube 140 and the odd-numbered valve 112 connected to it.

When explaining the operation of forcibly injecting air into the even-numbered air tubes 120 by alternating air injection, the odd valve 112, the outlet external connection valve 421 and the inlet internal connection valve 412 are closed, and the even numbered air tubes 120 are closed. The valve 122 , the outlet internal connection valve 422 , and the inlet external connection valve 411 are opened to drive the air pump 400 . When the air pump 400 is driven, external air is sucked into the air pump 400, and the air sucked into the air pump 400 passes through the outlet internal connection valve 422), and the internal connection tube 140 and the even valve ( 122) is forcibly injected into the even-numbered air tubes 120 connected to the even-numbered connection tube 111.

11 is a view showing the overall configuration of a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention and a flow of discharging air from the air tube. As shown in FIG. 11, when explaining the alternating flotation operation for forcibly discharging the air in the odd-numbered air tubes 110 in the expanded state of the present invention, the odd-numbered valve 112 and the inlet internal connection valve 412 , open the outlet external connection valve 421, close the even valve 122, the inlet external connection valve 411, and the outlet internal connection valve 422, and drive the air pump 400. When the air pump 400 is driven, the air in the air pump 400 goes out through the outlet external connection valve 421 to generate a negative pressure in the air pump 400, and the odd-numbered air tubes 110 are inflated. The odd-numbered connection tube 111, the odd-numbered valve 112, and the internal connection tube 140 by the air pressure in the odd-numbered air tubes 110 that have expanded the odd-numbered air tubes 110 in the initial stage when the state is converted to the contracted state. and the positive pressure generated by the air reaching the air pump 400 via the inlet internal connection valve 412 is greater than the negative pressure generated by driving the air pump 400, and thus the positive pressure is maintained in the air pump 400 for a period of time. After this elapsed, the air pressure of the odd-numbered air tubes 110 is lowered to about the first reference pressure, after the contraction state, the air pump 400 rather than the positive pressure due to the air coming into the air pump 400 from the odd-numbered air tubes 110 . The negative pressure generated by the driving of the air pump 400 starts to increase, and the residual air of the odd-numbered air tubes 110 is discharged by the driving of the air pump 400, so that the air pressure of the odd-numbered air tubes 110 due to the residual air decreases. After driving and stopping the air pump 400 until the air pressure becomes the second reference pressure, close the odd-numbered valve 112, open the outlet internal connection valve 422, and close the outlet external connection valve 421 to close the odd-numbered air Ends the forced air discharge operation of the tubes (110). Here, it is preferable that the first reference pressure is 25 mmhg, and the second reference pressure is 10 mmhg.

The inlet internal connection valve 412 in the drawing description showing the flow of injecting air from the odd-numbered air tubes 110 of FIG. 10 and the drawing description showing the flow of discharging the air from the odd-numbered air tubes 110 of FIG. 11 When is opened, the inlet external connection valve 411 is closed, and when the inlet internal connection valve 412 is closed, the inlet external connection valve 411 is opened. It is a 3-port 2-way solenoid valve that plays a role. When one side is opened, the two air openings and openings that close the other side are connected to the position of the inlet internal connection valve (412) and the inlet external connection valve (411), and the 3-port 2-way solenoid valve is always open It can also be used by connecting an air opening/closing port with the air outlet port (420).

12 is a diagram showing the block configuration of a control unit applied to a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function according to an embodiment of the present invention. As shown in FIG. 12 , the control unit 500 includes a differential pressure sensor 560 for sensing the air pressure of the internal connection tube 140 and an initial value control circuit 561 for calibrating the initial values of the differential pressure sensor 560 . ), a noise removal filter 562 that removes noise generated by the differential pressure sensor 560, a low noise amplifier circuit 563 that amplifies the signal detected by the differential pressure sensor 560, and an air intake valve control circuit 541 ), the air outlet valve control circuit 542, the odd valve control circuit 510, the even valve control circuit 520, the air pump control circuit 540, and the ratio for storing information to be stored even when the power is turned off A volatile memory 570 , an input/output device control circuit 580 , and a micro control unit (MCU) 550 may be included. Here, the MCU 550 includes a differential pressure sensor 560, an air intake valve control circuit 541, an air outlet valve control circuit 542, an odd valve control circuit 510, and an even valve control circuit in the control unit 500 ( 520 , the air pump control circuit 540 , the nonvolatile memory 570 , and the input/output device control circuit 580 can be controlled.

Although the present specification has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims described below. will be able to carry out Therefore, if the modified implementation basically includes the elements of the claims of the present invention, it should be considered that all of them are included in the technical scope of the present invention.

10: lying patient, 11: head, 12: shoulder, 13: hip,
55: hatched pulse width, 56: the point where the AC voltage becomes 0 volts
100: air pad part, 110: odd-numbered air tube, 111: odd-numbered connection tube,
112: odd valve, 120: even air tube, 121: even connection tube,
122: even valve, 131: 1+3K air tube,
where K is an integer corresponding to 1,2,3,4,5,6,
132: No. 2+3K air tube, 133: No. 3+3K air tube,
140: internal connection tube, 150: release valve, 200: air controller,
400: air pump, 401: external air outlet, 410: air intake,
411: inlet external connection valve, 412: inlet internal connection valve,
415: air inlet valve part, 420: air outlet,
421: outlet external connection valve, 422: outlet internal connection valve,
425: air outlet valve unit, 500: control unit,
510: odd valve control circuit, 520: even valve control circuit,
540: air pump control circuit, 541: air intake valve control circuit,
542: air outlet valve control circuit,
550: MCU, 560: differential pressure sensor, 561: initial value control circuit,
562: noise removal filter, 563: low noise amplifier circuit, 570: non-volatile memory;
580: input/output device control circuit, 600: input/output device

Claims (6)

The odd-numbered air tubes 110 and the even-numbered air tubes 120 are alternately arranged side by side to form the air pad part 100 , and the odd-numbered air tubes 110 are the odd-numbered valves through the odd-numbered connection tube 111 . (112) and the even-numbered air tubes 120 are connected to the even-numbered valve 122 through the even-numbered connection tube 121, and the air controller 200 is an odd-numbered valve 112 for opening and closing the odd-numbered connection tube 111. An even valve 122 that opens and closes the even connection tube 121 and an air pump 400 in which the amount of electricity supplied is controlled by a pulse width modulation control method is provided, and an odd valve 112 and an even valve 122 and a differential pressure sensor are provided. The internal connection tube 140 and the air inlet 410, which are air passages connecting the 560, are connected to or blocked by the internal connection tube 140. The inlet external connection valve 411 for connecting or blocking the outlet 401, the outlet external connection valve 421 for connecting or blocking the air outlet 420 to the external air outlet 401, and the air outlet 420 are connected to the inside. It has an outlet internal connection valve 422 for connecting or blocking the connection tube 140, a control unit 500 for controlling the valves 112, 122, 411, 412, 421, 422, and an input/output device 600 but,
When the control unit 500 receives an alternate levitation command from the input/output device 600 and performs an alternate flotation operation, when the odd-numbered air tubes 110 are to be expanded, the odd-numbered valve 112 is opened and the even-numbered valve 122 is closed. Close the inlet internal connection valve 412, open the inlet external connection valve 411, open the outlet internal connection valve 422, close the outlet external connection valve 421, and operate the air pump 400 to operate the inlet external connection valve ( 411), air is sucked into the air pump 400 from the outside, and the air sucked into the air pump 400 is the outlet internal connection valve 422, the internal connection tube 140, the odd valve 112, and the odd connection tube. It is injected into the odd-numbered air tubes 110 via (111), and the value measured by the air pressure of the internal connection tube 140 by the differential pressure sensor 560 is the preset air injection with the input/output device 600. If it is equal to or greater than the stopping pressure value, the air pump 400 stops driving and closes the odd valve 112 to end the expansion of the odd-numbered air tubes 110 in the alternating buoyancy,
When the contraction operation of the odd-numbered air tubes 110 is performed after the lapse of the preset alternate flotation cycle time, as shown in FIG. 11, the odd-numbered valve 112 is opened, the even-numbered valve 122 is closed, the inlet internal connection valve 412 is opened, and the inlet After closing the external connection valve 411, closing the outlet internal connection valve 422, and opening the outlet external connection valve 421, the air inside the air pump 400 is discharged to the outside through the outlet external connection valve 421. A negative pressure is generated in the air pump 400 by driving the air pump 400, and in the initial stage when the odd-numbered air tubes 110 are converted from the expanded state to the contracted state, the odd-numbered air tubes that have expanded the odd-numbered air tubes 110 are Generated by air reaching the air pump 400 via the odd-numbered connection tube 111, the odd-numbered valve 112, the internal connection tube 140, and the inlet internal connection valve 412 by the air pressure in the 110 The positive pressure is greater than the negative pressure generated by driving the air pump 400, and the positive pressure is maintained in the air pump 400, but as time elapses, the air pressure of the odd-numbered air tubes 110 is lowered to about the first reference pressure. The negative pressure caused by the driving of the pump 400 is greater than the positive pressure generated by the air reaching the air pump 400 by the air pressure of the odd-numbered air tubes 110, so that the negative pressure caused by the driving of the air pump 400 is odd. The air pump 400 is driven and stopped until the air pressure inside the odd-numbered air tubes 110 becomes the second reference pressure by forcibly discharging the residual air of the numbered air tubes 110, and then the odd-numbered air tube 110 ) so that the second reference pressure is maintained,

When the control unit 500 receives a continuous low pressure command from the input/output device 600 , the air pressure of the internal connection tube 140 is measured with the differential pressure sensor 560 so that the air pressure is higher than the third reference pressure. If it is high, the air of the odd-numbered air tubes 110 and the even-numbered air tubes 120 is discharged to the outside, and the value measured by the differential pressure sensor 560 connected to the inner connection tube 140 is equal to or smaller than the third reference pressure. The air pressure of the internal connection tube 140 is maintained at the third reference pressure by stopping the ground air from being discharged to the outside, and when the air pressure of the internal connection tube 140 is measured with the differential pressure sensor 560, the air pressure is When it is lower than the third reference pressure, the air pump 400 is driven to supply external air to the odd-numbered air tubes 110 and the even-numbered air tubes 120 to increase the air pressure, the differential pressure sensor 560 ), when the air pressure value of the internal connection tube 140 is equal to or greater than the third reference pressure, the operation of the air pump 400 is stopped, and the air pressure of the internal connection tube 140 periodically with the differential pressure sensor 560 When the air pressure of the internal connection tube 140, which was the third reference pressure, is lowered to the first reference pressure due to air leakage that is minutely generated in the air pad unit 100 and the air controller 200 by measuring the pressure, the air pump When the external air is supplied to the odd-numbered air tubes 110 and the even-numbered air tubes 120 by driving the 400, the air pressure of the internal connection tube 140 increases to the third reference pressure, the air pump ( 400) By repeating the operation of stopping the operation and keeping the internal connection tube 140 air pressure filled with the third reference pressure every time the air pressure of the internal connection tube 140 drops to the first reference pressure, the internal connection tube ( 140) maintains a continuous low pressure state where the air pressure is less than or equal to the third reference pressure and equal to or greater than the first reference pressure,
Massage therapy, characterized in that when the control unit 500 executes the continuous low pressure command, the air pump 400 is driven using the pulse width modulation control method in which the air pressure less than or equal to the fourth reference pressure is generated to reduce the operation noise A medical shift flotation mattress device having a function, a function of distributing body pressure, and a function of reducing operating noise. According to claim 1,
The pulse width modulation control method comprises:
Massage healing function, body pressure distribution function, and operation noise reduction, characterized in that it uses a zero-cross pulse width modulation method to control and control the pulse width at the reference point of 0 (V) voltage in the pulse of AC electricity supplied to the air pump A medical shift-float mattress device having a function. According to claim 1,
The first reference pressure is 25mmhg, and the second reference pressure is a medical shift flotation mattress device having a massage healing function, a body pressure distribution function and a noise reduction function, characterized in that using 10mmhg. According to claim 1,
The third reference pressure uses 27mmhg and the fourth reference pressure uses 35mmhg. A medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function. According to claim 1,
The control unit 500 includes a differential pressure sensor 560 for detecting the air pressure of the internal connection tube 140 and an initial value adjusting circuit 561 for calibrating the initial values of the differential pressure sensor 560, and a differential pressure sensor ( Massage healing function, body pressure distribution function and operation noise reduction function, characterized in that it includes a noise removal filter 562 that removes noise generated from 560) and a low noise amplifier circuit 563 that amplifies the signal detected by the differential pressure sensor A medical shift-floating mattress device having a. According to claim 1,
In lieu of the inlet internal connection valve (412) and the inlet external connection valve (411), the inlet internal connection valve (412) and the inlet external connection valve (411) are used to connect two air openings and openings that close when one side is opened with a solenoid with 3 ports 2 ), a medical shift flotation mattress device having a massage healing function, a body pressure distribution function, and a noise reduction function, characterized in that it is connected to the opposite side and used by connecting the always open air opening and closing port to the air outlet 420 .

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