Diabetic foot nursing device and heating control method

Abstract

The invention discloses a diabetic foot nursing device and a heating control method.The diabetic foot nursing device comprises a winding belt and a controller, the inner surface of the winding belt is provided with a plurality of heat conduction layers making contact with the skin, and the heat conduction layers are provided with temperature detection sensors; electrothermal film units are arranged on the inner side of the heat conduction layer, and each electrothermal film unit is connected with the controller; the controller is provided with a plurality of current output ends; one end of the electrothermal film unit is connected with a power supply output end, and the other end of the electrothermal film unit is connected with a GND end; and a bidirectional voltage stabilizing diode is connected between every two current output ends. The device can be wound around the legs and the feet of a patient, the attaching effect is good, stability and balance of temperature control can be achieved, and the device has the advantages of being simple in structure, low in cost, good in practicability and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a nursing device for diabetic foot and a heating control method. Background Art

[0002] Diabetic foot refers to the condition in which the gait of diabetic patients is different from that of healthy people due to factors such as vascular disease or neuropathy, and is accompanied by painful neuropathy in the feet, which causes large impulses and peaks in some parts of the feet. Under the stimulation of walking over time, foot trauma, ulcers and other diseases are formed. The care of patients with diabetic foot requires good warmth preservation to prevent the feet from getting cold, thereby promoting blood circulation in the feet and improving the symptoms of cold feet. At present, warmth preservation generally can be achieved by wearing warm shoes, thick socks or using corresponding heat sources. However, the method of wearing warm shoes or thick socks has poor warmth preservation effect due to the lack of corresponding heating devices. The use of hot water bottles, electric blankets or fires to directly increase the temperature is difficult to achieve gentle heating, and is prone to the problem of part being hot and part being cold, and requires repeated contact with the heat source. Due to neuropathy, diabetic patients may not be able to detect burns.‌ Summary of the invention

[0003] The purpose of the present invention is to provide a nursing device and heating control method for diabetic foot. The present invention can be wrapped around the patient's legs and feet, has a good fitting effect, can achieve stable and balanced temperature control, and has the advantages of simple structure, low cost, good practicality, etc.

[0004] The technical solution of the present invention is as follows: a care device for diabetic foot, comprising a wrapping belt and a controller, wherein the inner surface of the wrapping belt is provided with a plurality of heat-conducting layers in contact with the skin, and a temperature detection sensor is provided on the heat-conducting layer; an electric heating film unit is provided on the inner side of the heat-conducting layer, and each electric heating film unit is connected to the controller; the controller is provided with a plurality of current output terminals; one end of the electric heating film unit is connected to the power supply output terminal, and the other end of the electric heating film unit is connected to the GND terminal; bidirectional voltage regulator diodes are respectively connected between the current output terminals.

[0005] The above-mentioned diabetic foot care device has multiple current output terminals P1, P2, ..., P n and the corresponding GND terminal, the corresponding output current is I1, I2, ..., I n； The controller is used to detect the deviation between the current temperature and the set temperature, and adjust the output current I1, I2, I3, ..., I in real time according to the deviation. n , ensuring the temperature remains at the set temperature.

[0006] In the aforementioned nursing device for diabetic foot, the current output terminals are respectively connected with bidirectional voltage regulator diodes, that is, the current output terminals P1, P2, ..., Pn A bidirectional voltage regulator diode T is connected between jk , where: 1≤j <k≤n。

[0007] In the aforementioned care device for diabetic foot, toe covers are provided at the ends of the wrapping belt.

[0008] The aforementioned care device for diabetic foot, the back of the wrapping belt is provided with Velcro.

[0009] The heating control method of the aforementioned diabetic foot care device is to wrap the wrapping belt around the patient's legs and feet, sample the temperature of the thermal conductive layer at different positions by a temperature detection sensor, and then calculate the deviation between the temperature of the thermal conductive layer and the set temperature in the controller; the required output current control amount of the controller is obtained based on the deviation, and then the output current control amount is used to adjust the output current of each current output terminal to achieve heating control at different wrapping positions.

[0010] The heating control method of the aforementioned diabetic foot care device, when it is in the insulation state after being heated to the set temperature, detects the temperature difference between any two electric heating film units. If the temperature differences are less than the threshold value, the bidirectional voltage regulator tubes between the electric heating film units are not turned on, and the overall temperature of the winding belt is balanced; when the temperature difference between any two electric heating film units is greater than the threshold value, the bidirectional voltage regulator tubes between the two electric heating film units are turned on to adjust the output current of the power supply output end to be balanced between the two electric heating film units, so that the heat generation of the electric heating film units tends to be consistent, thereby achieving self-balancing of the temperature of the winding belt.

[0011] Compared with the prior art, the present invention adopts a wrapping belt to cover the diabetic foot. This method can be flexibly adjusted to better fit the legs and feet, and the insulation effect is good after wrapping, and it is not easy to lose heat. When the present invention is in use, the temperature of the heat-conducting layer at different positions is sampled by a temperature detection sensor, and then the deviation between the temperature of the heat-conducting layer and the set temperature in the controller is calculated; the required output current control amount of the controller is obtained according to the deviation, and the output current control amount is used to adjust the output current of each current output terminal, thereby realizing heating control at different wrapping positions. This heating method can heat according to the temperature of different positions of the legs and feet, saving energy consumption while more accurately controlling the temperature. Furthermore, when the present invention is in the heat preservation state, it will detect the temperature difference between any two electric heating film units. If the temperature differences are less than the threshold value, the bidirectional voltage regulator tubes between the electric heating film units will not be turned on, and the overall temperature of the winding belt will be balanced; when the temperature difference between any two electric heating film units is greater than the threshold value, the bidirectional voltage regulator tubes between the two electric heating film units will be turned on to adjust the output current of the power output end to be balanced between the two electric heating film units, so that the heating value of the electric heating film units tends to be consistent, and the temperature of the winding belt is self-balanced, thereby preventing large temperature deviations between the temperature parts of the winding belt, ensuring that the temperature is always in the optimal range, and improving the care effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the winding belt of the present invention; Figure 3 It is the control circuit diagram of the electric heating film unit; Figure 4 Heating circuit diagram for a single electric heating film unit; Figure 5 A circuit diagram for connecting the j-th electric heating film unit and the k-th electric heating film unit; Figure 6 The current output terminals P1, P2, ..., P n Connection circuit diagram.

[0013] Reference numerals 1. Wrapping tape; 2. Controller; 3. Heat-conducting layer; 4. Electric heating film unit; 5. Toe cover. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0015] Embodiment: A diabetic foot care device, such as Figure 1 and Figure 2 As shown, it includes a wrapping belt 1 and a controller 2. The wrapping belt 1 is a three-layer structure as a whole. The heat-conducting layer 3 that contacts the patient's body has multiple layers and is spaced in sequence along the strip direction of the wrapping belt 1; the material of the heat-conducting layer 3 can be ‌silicone rubber‌, which has excellent insulation and thermal conductivity and is soft; an electric heating film unit 4 with rapid heating performance is arranged on the inner side of the heat-conducting layer 3, and the electric heating film is a translucent polyester film that can generate heat after being energized; the outermost layer of the wrapping belt 1 is a cotton layer exposed to the air, which has excellent insulation and thermal insulation properties; a toe cover 5 is arranged at the end of the wrapping belt 1, and the toe cover 5 can be used to facilitate the front end of the wrapping belt Wearable; Velcro is provided on the back of the wrapping tape 1, which can be used to tighten the wrapping tape 1 after it is wrapped, or it can be rolled up and stored when not in use; a temperature detection sensor, such as an IC temperature sensor, is provided on the thermal conductive layer 3, which can be obtained commercially; each electric heating film unit 4 is connected to the controller 2; the controller 2 is provided with a plurality of current output terminals, and the current output terminal adopts a controllable current source to facilitate current regulation; one end of the electric heating film unit 4 is connected to the power output terminal, and the other end of the electric heating film unit 4 is connected to the GND terminal; bidirectional voltage regulator diodes are respectively connected between the current output terminals.

[0016] In this embodiment, the heating control method of the nursing device is: the wrapping belt is wrapped around the patient's legs and feet, and the temperature T of the heat conductive layer at different positions is sampled by the temperature detection sensor. f , and then calculate the temperature of the thermal conductive layer T f The controller sets the temperature T set The deviation between ΔT=T set -T f , according to the deviation ΔT, the controller's required output current control V clt , and then the output current control quantity V clt By adjusting the output current of each current output terminal, heating control of different winding positions can be achieved. This heating method can heat according to the temperature of different positions of the legs and feet, saving energy and more accurate temperature control.

[0017] Furthermore, when it is in the insulation state after being heated to the set temperature, the temperature difference between any two electric heating film units is detected by the temperature detection sensor. If the temperature difference is less than the threshold value, the bidirectional voltage regulator tubes between the electric heating film units are not turned on, and the overall temperature of the winding belt is balanced; when the temperature difference between any two electric heating film units is greater than the threshold value, the bidirectional voltage regulator tubes between the two electric heating film units are turned on to adjust the output current of the power output end to be balanced between the two electric heating film units, so that the heat generation of the electric heating film units tends to be consistent, thereby realizing the self-balancing of the temperature of the winding belt.

[0018] In order to illustrate the principle of temperature control and self-balancing of the winding belt, Figure 3 The circuit structure shown in the figure shows that Figure 3 The control circuit diagram of the electric heating film unit is shown, which mainly includes n electric heating films evenly placed at equal intervals, a controller and connecting wires. The n electric heating film units are connected to P1, P2, P3, ..., P n Between P1, P2, P3, ..., P n It is the power output terminal (controllable current source) inside the controller, and its corresponding output current is I1, I2, I3, ..., I n The controller samples the deviation between the current temperature of the thermal conductive layer and the set temperature, and adjusts the output currents I1, I2, I3, ..., I of the controllable current source in real time according to the deviation. n , ensure that the temperature of the ICU constant temperature blanket remains at the set temperature.

[0019] Figure 4 The figure shows a heating circuit diagram of a single electric heating film unit, including: a power output terminal and an electric heating film unit. Since the electric heating film unit is equivalent to a pure resistor, heat will be generated when the output current I at the power output terminal flows through the electric heating film. Based on the above principle, the heating value and temperature of the electric heating film can be adjusted by adjusting the current I.

[0020] Figure 5 The diagram shows a circuit diagram of connecting the jth electric heating film unit and the kth electric heating film unit, including: the jth current output terminal, the jth electric heating film unit equivalent resistance R j , the kth current output terminal, the kth electric heating film unit equivalent resistance R k and connect in P j P k The bidirectional voltage regulator T jk . Figure 6 The current output terminals P1, P2, ..., P n The above electronic components mainly form a temperature self-balancing circuit, and its working principle is: although the electric heating film and the current output end use the same material, shape, circuit structure, etc., due to factors such as the manufacturing process, R j With R k , there is always a slight difference between the jth current output terminal and the kth current output terminal. Figure 3 When the controller shown controls all current output terminals with the same control quantity, R j and R k There must be a deviation in the voltage at both ends of R j and R kThe corresponding heat generation also has deviations, which leads to inconsistent temperatures in different areas of the wrapping tape. When the temperature inconsistency in different areas of the wrapping tape is small, that is, P j P k The voltage difference between them is very small, so the bidirectional voltage regulator T jk No conduction, the temperature balance performance of the wrapping tape meets the requirements. However, when the temperature difference between different areas of the wrapping tape is large, that is, P j P k The voltage difference between them is large, so the bidirectional voltage regulator T jk conduction, regulating the output current I j and I k In R j and R k Balance between the two, and then adjust R j and R k The heat generation of the electric heating film unit tends to be consistent, achieving the temperature balance requirement of the winding belt. Since the temperature of the winding belt is actively and autonomously balanced, the above circuit structure solves the temperature imbalance problem caused by inconsistent parameters of the electric heating film unit and the current output end.

[0021] Assume that the bidirectional voltage regulator T jk The voltage regulation value is V jk , flows through R j The current value is I Rj , flows through R k The current value is I Rk , then according to electrical engineering knowledge, we can get node P j , P k Potential V Pj and V Pk satisfy: ; T jk The pressure difference between the two ends is: ; Due to the inconsistency between the parameters of the controlled current source and the heating film, Non-zero. If Less than the set V jk , then T jk No conduction, at this time there is I Pj =I j , I Pk =I k , the temperature balance performance of different areas of the wrapping tape meets the requirements. Greater than the setting V jk , then T jk conduction, at this time there is I Pj ≠I j , I Pk ≠I k , total current In R j and R k If R j With R k equal, then flow through R j With R k The current I Rj =I Rk , so (I Rj ) 2 R j =(I Rk ) 2 R k , thus achieving balanced control of heat generation. j With R k If they are not equal, the current is realized according to the parallel shunt principle. j With R k The voltages at both ends are approximately equal, that is, V Pj ≈V Pk . And because the electric heating film unit resistance R j With R k The deviation is relatively small, so it can be approximately considered , and thus achieve balanced control of heat generation, that is, balanced control of temperature. From the above analysis, it can be seen that the balanced performance of the winding belt is determined by the bidirectional voltage regulator tube T jk The voltage regulation value is V jk Decision. jk The larger the value, the worse the balancing performance of the wrapping belt; conversely, the better the balancing performance of the wrapping belt; It can be seen that the heating circuit of the present invention can independently realize the temperature balance control between all current output ends and the electric heating film unit, ensuring that the temperature of different areas of the winding belt remains consistent. In summary, the present invention can be wrapped around the patient's legs and feet, has a good fitting effect, and can achieve stable and balanced temperature control, and has the advantages of simple structure, low cost, good practicality, etc.

Claims

1. A diabetic foot care device, comprising a winding belt and a controller, characterized in that: The inner surface of the wrapping belt is provided with multiple heat-conducting layers in contact with the skin, and temperature detection sensors are provided on the heat-conducting layers; the inner side of the heat-conducting layer is provided with electric heating film units, and each electric heating film unit is connected to a controller; the controller is provided with multiple current output terminals; one end of the electric heating film unit is connected to the power output terminal, and the other end of the electric heating film unit is connected to the GND terminal; bidirectional voltage regulator diodes are respectively connected between the current output terminals.

2. The diabetic foot care device according to claim 1, characterized in that: Multiple current output terminals P1, P2, ..., P n and the corresponding GND terminal, the corresponding output current is I1, I2, ..., I n； The controller is used to detect the deviation between the current temperature and the set temperature, and adjust the output current I1, I2, I3, ..., I in real time according to the deviation. n , ensuring the temperature remains at the set temperature.

3. The diabetic foot care device according to claim 2, characterized in that: The current output terminals are connected to bidirectional voltage regulator diodes respectively. n A bidirectional voltage regulator diode T is connected between jk , where: 1≤j <k≤n。 4. The diabetic foot care device according to claim 1, characterized in that: The end of the wrapping belt is provided with a toe cap.

5. The diabetic foot care device according to claim 1, characterized in that: The back of the wrapping belt is provided with a Velcro.

6. The heating control method of the diabetic foot care device according to any one of claims 1 to 5, characterized in that: The wrapping belt is wrapped around the patient's legs and feet, and the temperature of the heat-conducting layer at different positions is sampled by a temperature detection sensor, and then the deviation between the temperature of the heat-conducting layer and the set temperature in the controller is calculated; the required output current control amount of the controller is obtained according to the deviation, and then the output current control amount is used to adjust the size of the output current of each current output end to achieve heating control at different wrapping positions.

7. The heating control method of the diabetic foot care device according to claim 6, characterized in that: When it is in the insulation state after being heated to the set temperature, the temperature difference between any two electric heating film units is detected. If the temperature difference is less than the threshold value, the bidirectional voltage regulator tubes between the electric heating film units are not turned on, and the overall temperature of the winding belt is balanced; when the temperature difference between any two electric heating film units is greater than the threshold value, the bidirectional voltage regulator tubes between the two electric heating film units are turned on to adjust the output current of the power output end to be balanced between the two electric heating film units, so that the heating value of the electric heating film units tends to be consistent, and the temperature of the winding belt is self-balanced.

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