An automated peritoneal dialysis machine

Abstract

The utility model relates to peritoneal dialysis machine technical field, and disclose an automatic peritoneal dialysis machine, including dialysis frame, protection shell and heating device. The automatic peritoneal dialysis machine, when heating, dialysis fluid bag is pasted in the bottom hot plate inside, and the heating of bottom heating film is carried out from the bottom, and the heating of top heating film is carried out from the top, and the PWM mode regulation is adopted to carry out intermittent heating, and the heating power can be accurately regulated by adjusting pulse width (duty ratio), the target temperature demand is matched fast, and the dialysis fluid heating is more uniform, and the temperature of medicine liquid bag is monitored in real time through temperature sensor, when the temperature of medicine liquid bag is higher than the heating temperature set 1 DEG C, the data will be transmitted to top temperature control switch and bottom temperature control switch, at this moment, alarm is sent and heating is stopped. When the temperature monitored by temperature sensor is lower than the set temperature 1 DEG C, the top heating film and bottom heating film will continue to heat, so as to maintain the stability of medicine liquid temperature.

Description

Technical Field

[0001] This utility model relates to the field of peritoneal dialysis machine technology, specifically an automated peritoneal dialysis machine. Background Technology

[0002] A peritoneal dialysis machine is a medical device that automatically injects dialysate into a patient's peritoneal cavity, utilizing the peritoneum as a semipermeable membrane to complete solute exchange (diffusion) and water removal (ultrafiltration). Its core principle is based on the concentration gradient difference across the peritoneum, achieving metabolic waste removal and electrolyte balance regulation through repeated dialysate replacement. Before injection, the dialysate needs to be heated to match the patient's body temperature. Typical peritoneal dialysis machines use simple heating methods, resulting in poor uniformity of heating the dialysate within the dialysis bag. This leads to a temperature difference between the dialysate and the patient's body, causing discomfort when the dialysate is injected into the body. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides an automated peritoneal dialysis machine that solves the problem of discomfort caused by poor uniformity in heating the dialysis fluid.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automated peritoneal dialysis machine, comprising a dialysis frame, a protective shell, and a heating device, wherein the protective shell is fixedly installed on the top of the dialysis frame by bolts, and the heating device is installed inside the protective shell;

[0007] The protective housing also includes a circuit fixing plate, a capacitor, a temperature control plate, a protective bottom shell, a weight sensor, a relay, a rotating shaft, and a protective top shell. The circuit fixing plate is fixedly installed at the bottom of the protective bottom shell, the temperature control plate is fixedly installed at the top of the circuit fixing plate, the capacitor is fixedly installed on the surface of the temperature control plate, the relay is fixedly installed at the top of the circuit fixing plate, the weight sensor is fixedly installed above the circuit fixing plate, and the protective top shell is hinged to the top of the protective bottom shell via a rotating shaft.

[0008] The heating device further includes a top temperature control switch, a supporting top shell, a top heating film, a top heating plate, a limiting block, guide rollers, a bottom heating film, a bottom temperature control switch, a bottom heating plate, a temperature sensor, and a pressure plate. The bottom heating plate is fixedly installed on top of the weight sensor via a support rod. The bottom heating film is attached to the outer side of the bottom heating plate. The bottom temperature control switch is fixedly installed at the bottom of the bottom heating plate. The temperature sensor is fixedly installed on the inner wall near the bottom of the bottom heating plate. The pressure plate is fixedly installed on the inner wall at the bottom of the bottom heating plate. The supporting top shell is fixedly installed on top of the bottom heating plate via a limiting block. The top temperature control switch is fixedly installed on top of the top heating plate. The top heating plate is slidably engaged with the top of the bottom heating plate via guide rollers and is located inside the supporting top shell. The top heating film is fixedly attached to the outer side of the top heating plate.

[0009] Preferably, the dialysis machine frame further includes a main body, a movable base, a waste liquid tray, an equipment box, a handrail, a storage box, an operation screen, an infusion rack, and a glass tube clamp. The main body is fixedly installed on the top of the movable base, the waste liquid tray is fixedly installed on the top of the movable base and located at the front of the main body, the equipment box is fixedly installed on the outside of the main body, the storage box is fixedly installed on the right side of the equipment box, the handrail is fixedly installed on the outer wall of the main body, the operation screen is fixedly installed on the front side wall of the main body, the protective bottom shell is fixedly installed on the top of the main body, the infusion rack is fixedly installed on the rear side wall of the main body, and the glass tube clamp is fixedly installed on the outer surface of the infusion rack.

[0010] Preferably, the main body can be folded along the top of the equipment box.

[0011] Preferably, the temperature sensor is a DS18B20 digital temperature sensor.

[0012] Preferably, the weight sensor is used to detect the weight of the remaining medication in the dialysis bag.

[0013] Preferably, the top heating film and the bottom heating film are heated by PWM signal control. The on and off time of the heating film is adjusted to control the ratio of heating cycle and non-heating cycle within one second to achieve heating. By adjusting the pulse width (duty cycle), the heating power can be precisely adjusted to quickly match the target temperature requirement.

[0014] Compared with the prior art, this utility model provides an automated peritoneal dialysis machine, which has the following beneficial effects:

[0015] 1. In this automated peritoneal dialysis machine, the dialysate bag is attached to the inside of the bottom heating plate during heating. Heating is carried out from the bottom through the bottom heating film and from the top through the top heating film. At the same time, intermittent heating is regulated by PWM mode. By adjusting the pulse width (duty cycle), the heating power can be precisely adjusted to quickly match the target temperature requirement and make the dialysate heating more uniform.

[0016] 2. This automated peritoneal dialysis machine monitors the temperature of the medication bag in real time using a temperature sensor. When the temperature of the medication bag exceeds the set heating temperature by 1°C, it transmits data to the top and bottom temperature control switches, triggering an alarm and stopping heating. When the temperature monitored by the temperature sensor is below the set temperature by 1°C, it controls the top and bottom heating films to continue heating, thereby maintaining the stability of the medication temperature and preventing discomfort caused by temperature differences during dialysis. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure on the right side of this utility model;

[0019] Figure 3 This is a schematic diagram of the protective shell and heating device of this utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of the heating device of this utility model;

[0021] Figure 5 This is a schematic diagram of the heating device structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of the protective shell of this utility model.

[0023] The components include: 1. Dialysis machine frame; 51. Main body; 52. Movable seat; 53. Waste liquid tray; 54. Equipment box; 55. Handrail; 56. Storage box; 57. Control panel; 58. Drip rack; 59. Glass tube clamp; 2. Protective outer shell; 21. Circuit fixing plate; 22. Capacitor; 23. Temperature control board; 24. Protective bottom shell; 25. Weight sensor; 26. Relay; 27. Rotating shaft; 28. Protective top shell; 3. Heating device; 31. Top temperature control switch; 32. Supporting top shell; 33. Top heating film; 34. Top heating plate; 35. Limiting block; 36. Guide roller; 37. Bottom heating film; 38. Bottom temperature control switch; 39. Bottom heating plate; 40. Temperature sensor; 41. Pressure plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6This utility model provides an automated peritoneal dialysis machine, including a dialysis machine frame 1, a protective shell 2, and a heating device 3. The protective shell 2 is fixedly installed on the top of the dialysis machine frame 1 by bolts, and the heating device 3 is installed inside the protective shell 2.

[0026] The protective housing 2 also includes a circuit fixing plate 21, a capacitor 22, a temperature control plate 23, a protective bottom shell 24, a weight sensor 25, a relay 26, a rotating shaft 27, and a protective top shell 28. The circuit fixing plate 21 is fixedly installed at the bottom of the protective bottom shell 24, the temperature control plate 23 is fixedly installed at the top of the circuit fixing plate 21, the capacitor 22 is fixedly installed on the surface of the temperature control plate 23, the relay 26 is fixedly installed on the top of the circuit fixing plate 21, the weight sensor 25 is fixedly installed above the circuit fixing plate 21, and the protective top shell 28 is hinged to the top of the protective bottom shell 24 through the rotating shaft 27. The weight sensor 25 can measure the mass of the dialysis fluid bag in real time. When the dialysis fluid inside the dialysis fluid bag is drained, the weight sensor 25 detects that the mass of the dialysis fluid is lower than the set value and automatically controls the heating device 3 to stop heating to prevent dry burning and potential danger.

[0027] The heating device 3 also includes a top temperature control switch 31, a supporting top shell 32, a top heating film 33, a top heating plate 34, a limiting block 35, a guide roller 36, a bottom heating film 37, a bottom temperature control switch 38, a bottom heating plate 39, a temperature sensor 40, and a pressure plate 41. The bottom heating plate 39 is fixedly installed on top of the weight sensor 25 by a support rod. The bottom heating film 37 is attached to the outside of the bottom heating plate 39. The bottom temperature control switch 38 is fixedly installed on the bottom of the bottom heating plate 39. The temperature sensor 40 is fixedly installed on the bottom inner wall of the bottom heating plate 39. The pressure plate 41 is fixedly installed on the bottom inner wall of the bottom heating plate 39. The supporting top shell 32 is fixedly installed on the bottom heating plate by the limiting block 35. At the top of the top of the bottom heating plate 34, the top temperature control switch 31 is fixedly installed. With the cooperation of the top temperature control switch 31 and the bottom temperature control switch 38, the heating will automatically disconnect when the temperature of the heating film reaches the temperature set by the temperature control switch itself. The top heating plate 34 is slidably engaged with the top of the bottom heating plate 39 by the guide roller 36 and is located inside the supporting top shell 32. The top heating film 33 is fixedly attached to the outside of the top heating plate 34. By placing the dialysis bag inside the bottom heating plate 39, the bottom heating film 37 and the top heating film 33 are used for heating. The controller controls the heating. The controller uses a microcontroller to implement the PID algorithm.

[0028] PID control principle: By adjusting the power of the heating membrane, the temperature of the dialysate is stabilized at the set value;

[0029] The three elements of PID control are: P (proportional): the difference between the current temperature and the target temperature (error) multiplied by the proportional coefficient Kp; I (integral): accumulating historical errors and eliminating static errors; D (derivative): predicting future temperature change trends and suppressing overshoot.

[0030] PID calculation: Calculate the output value based on the current temperature error: Output = Kpe(t) + Ki∫e(t)dt + Kddtde(t).

[0031] Furthermore, the dialysis machine frame 1 also includes a main body 51, a movable seat 52, a waste liquid tray 53, an equipment box 54, a handrail 55, a storage box 56, an operation screen 57, an infusion rack 58, and a glass tube clamp 59. The main body 51 is fixedly installed on the top of the movable seat 52, the waste liquid tray 53 is fixedly installed on the top of the movable seat 52 and is located on the front side of the main body 51, the equipment box 54 is fixedly installed on the outside of the main body 51, the storage box 56 is fixedly installed on the right side of the equipment box 54, the handrail 55 is fixedly installed on the outer wall of the main body 51, the operation screen 57 is fixedly installed on the front side wall of the main body 51, the protective bottom shell 24 is fixedly installed on the top of the main body 51, the infusion rack 58 is fixedly installed on the rear side wall of the main body 51, and the glass tube clamp 59 is fixedly installed on the outer surface of the infusion rack 58.

[0032] Furthermore, the main body 51 can be folded along the top of the equipment box 54, making it easy to store when not in use.

[0033] Furthermore, the temperature sensor 40 is a DS18B20 digital temperature sensor. It monitors the temperature of the medication bag in real time. When the temperature of the medication bag exceeds the set heating temperature by 1°C, it transmits data to the top temperature control switch 31 and the bottom temperature control switch 38, triggering an alarm and stopping heating. When the temperature monitored by the temperature sensor 40 is below the set temperature by 1°C, it controls the top heating film 33 and the bottom heating film 37 to continue heating, thereby maintaining the stability of the medication temperature and preventing discomfort caused by temperature differences during dialysis.

[0034] Furthermore, the weight sensor 25 is used to detect the weight of the remaining medication in the dialysis bag. The weight sensor 25 detects the weight of the dialysis bag in the heating tank before treatment begins. When the weight is less than the set value, the valve of the replenishment pipeline will be opened to continue replenishing the medication.

[0035] Furthermore, the top heating film 33 and the bottom heating film 37 are heated by PWM signal control. The on and off time of the heating film is adjusted to control the ratio of heating cycle and non-heating cycle within one second to achieve heating. By adjusting the pulse width (duty cycle), the heating power can be precisely adjusted to quickly match the target temperature requirement, avoid the continuous conduction loss of traditional linear voltage regulation, effectively reduce energy waste and improve energy utilization. The output is mapped to PWM duty cycle (0-100% control of heating film power).

[0036] In use, open the protective top cover 28, place the dialysate bag inside the bottom heating plate 39, push the top heating plate 34 forward to the top of the dialysate bag, and then close the protective top cover 28. Through the cooperation of the top heating film 33 and the bottom heating film 37, the dialysate bag is heated from both the top and bottom sides simultaneously. During heating, PWM pulse heating is used. During the heating process, the heating temperature of the dialysate bag is detected in real time by the temperature sensor 40. When the temperature of the dialysate bag reaches the specified temperature, the top heating film 33 and the bottom heating film 37 are controlled to stop heating. When the temperature sensor 40 detects that the dialysate temperature drops again, the top heating film 33 and the bottom heating film 37 are controlled to resume heating. When the weight sensor 25 detects that the weight of the dialysate inside the dialysate bag is less than the set weight, the medication will be automatically replenished. After the medication is replenished to the set weight, the heating and dialysis operations will resume.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated peritoneal dialysis machine comprising a dialysis machine frame (1), a protective casing (2) and a heating device (3), characterized in that: The protective outer shell (2) is fixedly installed on the top of the dialysis machine frame (1) by bolts, and the heating device (3) is installed inside the protective outer shell (2); The protective housing (2) also includes a circuit fixing plate (21), a capacitor (22), a temperature control plate (23), a protective bottom shell (24), a weight sensor (25), a relay (26), a rotating shaft (27), and a protective top shell (28). The circuit fixing plate (21) is fixedly installed at the bottom of the protective bottom shell (24), the temperature control plate (23) is fixedly installed at the top of the circuit fixing plate (21), the capacitor (22) is fixedly installed on the surface of the temperature control plate (23), the relay (26) is fixedly installed at the top of the circuit fixing plate (21), the weight sensor (25) is fixedly installed above the circuit fixing plate (21), and the protective top shell (28) is hinged to the top of the protective bottom shell (24) through the rotating shaft (27). The heating device (3) further includes a top temperature control switch (31), a supporting top shell (32), a top heating film (33), a top heating plate (34), a limiting block (35), a guide roller (36), a bottom heating film (37), a bottom temperature control switch (38), a bottom heating plate (39), a temperature sensor (40), and a pressure plate (41). The bottom heating plate (39) is fixedly installed on the top of the weight sensor (25) by a support rod. The bottom heating film (37) is attached to the outside of the bottom heating plate (39). The bottom temperature control switch (38) is fixedly installed on the bottom of the bottom heating plate (39). A temperature sensor (40) is fixedly installed on the bottom inner wall of the bottom heating plate (39). The pressure plate (41) is fixedly installed on the bottom inner wall of the bottom heating plate (39). The supporting top shell (32) is fixedly installed on the top of the bottom heating plate (39) by a limiting block (35). The top temperature control switch (31) is fixedly installed on the top of the top heating plate (34). The top heating plate (34) is slidably engaged with the top of the bottom heating plate (39) by a guide roller (36) and located inside the supporting top shell (32). The top heating film (33) is fixedly attached to the outside of the top heating plate (34).

2. The automated peritoneal dialysis machine according to claim 1, characterized in that: The dialysis rack (1) also includes a main body (51), a movable base (52), a waste liquid tray (53), an equipment box (54), a handrail (55), a storage box (56), an operation panel (57), an IV drip holder (58), and a glass tube clamp (59). The main body (51) is fixedly installed on the top of the movable base (52), and the waste liquid tray (53) is fixedly installed on the top of the movable base (52). The waste liquid tray (53) is located on the front side of the main body (51). The equipment box (54) is fixedly installed on the top of the movable base (52). The storage box (56) is fixedly installed on the right side of the equipment box (54), the armrest (55) is fixedly installed on the outer wall of the main body (51), the operation screen (57) is fixedly installed on the front side wall of the main body (51), the protective bottom shell (24) is fixedly installed on the top of the main body (51), the drip holder (58) is fixedly installed on the rear side wall of the main body (51), and the glass tube clamp (59) is fixedly installed on the outer surface of the drip holder (58).

3. An automated peritoneal dialysis machine according to claim 2, characterized in that: The main body (51) can be folded along the top of the equipment box (54).

4. An automated peritoneal dialysis machine according to claim 1, characterized in that: The temperature sensor (40) is a DS18B20 digital temperature sensor.

5. An automated peritoneal dialysis machine according to claim 1, characterized in that: The weight sensor (25) is used to detect the weight of the remaining medication in the dialysis bag.

6. An automated peritoneal dialysis machine according to claim 1, characterized in that: The top heating film (33) and the bottom heating film (37) are heated by PWM signal control. The on and off time of the heating film is adjusted to control the ratio of heating cycle and non-heating cycle within one second to achieve heating.

Images