Constant-temperature nasal feeding device and control method thereof

Abstract

The invention discloses a constant-temperature nasal feeding device and a control method thereof, and relates to the field of medical equipment.The constant-temperature nasal feeding device comprises a heating device used for heating nasal feeding food; the pipeline is used for conveying nasal feeding food, and one end of the pipeline is fixedly connected with the heating device; the heating device comprises a feeding port, a discharging port, a heating part, a conveying part and a material containing cavity. The feeding port is formed in one end of the material containing cavity, the discharging port is formed in the side, opposite to the feeding port, of the material containing cavity, and the heating part and the conveying part are located in the material containing cavity. The heating part is used for heating nasal feeding food input from the feeding opening; the conveying part is used for providing power for conveying the food from the heating device to the pipeline. The heating device, the flow control electromagnetic valve and the detection device are integrated, the heating device achieves accurate heating of nasal feeding liquid through the heating electromagnetic coil, and it is ensured that the nasal feeding liquid is always kept at the proper temperature in the conveying process.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more specifically, to a constant-temperature nasogastric feeding device and its control method. Background Technology

[0002] Nasogastric feeding is a medical procedure that delivers nutrients directly to the stomach through the nose. It is commonly used for patients who cannot eat orally, such as critically ill patients, comatose patients, or patients with swallowing difficulties. With an aging population, many elderly people with poor health or those recovering at home also require nasogastric feeding devices when no one is available to care for them. The nasogastric feeding device delivers liquid food (such as blended food, water, and medication) to the patient's stomach through a feeding tube, providing essential nutritional support.

[0003] In existing technologies, especially for patients who require nasogastric feeding at home for extended periods, the delivery of nasogastric feeding food is easily affected by the ambient temperature, particularly in cold seasons or air-conditioned environments. This can cause the temperature of the nasogastric feeding food to drop, leading to diarrhea in patients. Furthermore, nasogastric feeding food is often prepared manually by family members, and there are significant errors in the uniformity of the food and in controlling the injection speed and amount. This can easily lead to blockage of the nasogastric feeding tube and poor feeding efficacy, affecting patient comfort and treatment outcomes. Summary of the Invention

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a constant-temperature nasal feeding device, including: a heating device for heating nasal-feeding food; and a pipe for conveying the nasal-feeding food, one end of which is fixedly connected to the heating device; wherein the heating device includes an inlet, an outlet, a heating section, a conveying section, and a feeding chamber; the inlet is located at one end of the feeding chamber, and the outlet is located on the opposite side of the inlet on the feeding chamber; the heating section and the conveying section are located inside the feeding chamber; the heating section is used to heat the nasal-feeding food input through the inlet; the conveying section is used to provide power for conveying the food from the heating device to the pipe; the constant-temperature nasal feeding device... The device further includes: a detection device for detecting the operating status of the nasogastric feeding device based on an input electrical signal; a control device for sending a control signal to the flow control solenoid valve based on the control signal sent by the detection to control the actuator; and an actuator for controlling the operating status of the nasogastric feeding device based on an input electrical signal. The actuator includes: a flow control solenoid valve disposed in the discharge port, which controls the diameter of the discharge port based on an input electrical signal; and a heating electromagnetic coil disposed in the heating section, which controls the temperature of the heating section based on an input electrical signal.

[0006] Furthermore, the conveying unit includes a power source, a spiral conveyor, and a filter screen. The power source is fixedly connected to the spiral conveyor to provide power for the rotation of the spiral conveyor. The spiral conveyor includes a first conveying unit and a second conveying unit, which are arranged in parallel within the material receiving cavity. The filter screen is fixedly disposed between the spiral conveyor and the inner wall of the material receiving cavity, and the filter screen has a plurality of filter holes.

[0007] Furthermore, the angle between the axis of the spiral conveyor in the material cavity and the horizontal line ranges from 5° to 15°.

[0008] Furthermore, the inner wall of the material receiving cavity located on the side of the discharge port is inclined, and its tangential angle is equal to the angle between the axis of the spiral conveyor in the material receiving cavity and the horizontal line.

[0009] Furthermore, the diameter of the filter element near the feed inlet is smaller than the diameter of the filter element away from the feed inlet.

[0010] Furthermore, the constant temperature nasal feeding device also includes: an anti-displacement device for fixing the pipeline; the anti-displacement device further includes an infrared transmitter and an infrared receiver, wherein the infrared transmitter is fixedly connected to the pipeline, and the infrared receiver is used to receive the infrared rays emitted by the infrared transmitter; the control device sends a control signal to the execution device according to the control signal sent by the infrared receiver to control the execution device.

[0011] Furthermore, the detection device includes: a temperature detection sensor for detecting the temperature of the nasogastric feeding food in the pipe; the control device sends a control signal to the execution device based on the control signal sent by the temperature detection sensor to control the execution device; and a flow rate detection sensor for detecting the flow rate of the nasogastric feeding food in the pipe; the control device sends a control signal to the execution device based on the control signal sent by the flow rate detection sensor to control the execution device.

[0012] Furthermore, the constant temperature nasal feeding device also includes: an interactive device for user operation to achieve human-computer interaction; wherein, the control device sends control signals to the execution device according to the control signals sent by the interactive device.

[0013] As a second aspect of this application, some embodiments of this application provide a method for controlling a constant-temperature nasogastric feeding device, executed by the aforementioned constant-temperature nasogastric feeding device, the control method comprising: Step 1: Obtain the operating status of the constant temperature nasal feeding device in response to the control signal sent by the detection device; Step 2: The control device determines, based on the control signal sent by the detection device, whether the temperature signal sent by the temperature detection sensor is greater than the set temperature threshold, and / or whether the flow rate signal sent by the flow rate detection sensor is greater than the set flow rate threshold. Step 3: If so, the control device sends a control signal to the flow control solenoid valve to reduce the discharge from the outlet and a control signal to the heating solenoid coil to reduce the temperature of the heating section.

[0014] Furthermore, the control method also includes: the control device determines whether it has received infrared rays emitted by the infrared transmitter based on the control signal sent by the infrared receiver; if not, it sends a control signal to the flow control solenoid valve to close the discharge port.

[0015] The beneficial effects of this application are as follows: 1. This solution provides a comprehensive constant-temperature nasal feeding device that integrates a heating unit, a flow control solenoid valve, and a detection device. The heating unit precisely heats the nasal feeding solution via a heating solenoid coil, ensuring that the solution maintains a suitable temperature throughout the feeding process. Simultaneously, the flow control solenoid valve precisely controls the outlet diameter based on the input electrical signal, ensuring a stable and controllable flow rate of the nasal feeding solution. This integrated design makes the nasal feeding process safer, more efficient, and more comfortable.

[0016] This solution employs multiple detection devices, such as temperature and flow rate sensors, to monitor the temperature and flow rate of the nasogastric feeding solution in real time. These sensors transmit the detected data to a control unit, which determines whether to adjust the operation of the flow control solenoid valve and heating solenoid coil based on set thresholds, ensuring that the temperature and flow rate of the nasogastric feeding solution are always optimal. This real-time monitoring and automatic adjustment mechanism significantly improves the safety and effectiveness of the nasogastric feeding process. In summary, this solution offers a comprehensive advantage in terms of versatility, high precision and stability, and cost-effectiveness, significantly enhancing the flexibility and accuracy of medical procedures and meeting diverse clinical needs. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0018] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a constant temperature nasal feeding device according to an embodiment of this application during use; Figure 2 This is a schematic diagram of the heating device structure of a constant temperature nasal feeding device according to an embodiment of this application; Figure 3 This is a side view of the heating device of a constant temperature nasal feeding device according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the filter element of a constant temperature nasal feeding device according to an embodiment of this application; Figure 5 This is a schematic diagram of the signal transmission of a constant temperature nasal feeding device according to an embodiment of this application; Meaning of the reference numerals in the diagram: 100. Heating device; 110. Feed inlet; 120. Discharge outlet; 130. Heating section; 140. Conveying section; 141. Power source; 142. Screw conveyor; 142a. First conveying unit; 142b. Second conveying unit; 143. Filter screen; 150. Material container. 200. Detection device; 210. Temperature sensor; 220. Flow rate sensor; 300. Actuating device; 310. Flow control solenoid valve; 320. Heating solenoid coil; 400. Control device; 500. Anti-displacement device; 510. Infrared transmitter; 520. Infrared receiver; 600. Interactive devices; 700. Pipeline. Detailed Implementation

[0020] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0021] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0022] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0023] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0024] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0025] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 5As shown, a specific embodiment of this application discloses a constant-temperature nasal feeding device, including: a heating device 100 for heating nasal feeding food; and a pipe 700 for conveying nasal feeding food, one end of which is fixedly connected to the heating device 100; wherein, the heating device 100 includes an inlet 110, an outlet 120, a heating section 130, a conveying section 140, and a feeding cavity 150; the inlet 110 is disposed at one end of the feeding cavity 150, the outlet 120 is disposed on the side of the feeding cavity 150 opposite to the inlet 110, and the heating section 130 and the conveying section 140 are located inside the feeding cavity 150; the heating section 130 is used to heat the nasal feeding food input through the inlet 110; the conveying section 140 is used to provide power for conveying food from the heating device 100 to the pipe 700; the constant-temperature nasal feeding device 100 is used to heat the nasal feeding food input through the inlet 110; the constant-temperature nasal feeding device 100 is used to heat the nasal feeding food input through the inlet 110; the constant-temperature nasal feeding device 100 is used to heat the nasal feeding food input through the heating device 10 ... The nasal feeding device further includes: a detection device 200 for detecting the operating status of the nasal feeding device based on an input electrical signal; a control device 400 for sending a control signal to the flow control solenoid valve 310 based on the control signal sent by the detection to control the execution device 300; and an execution device 300 for controlling the operating status of the nasal feeding device based on an input electrical signal. The execution device 300 includes: a flow control solenoid valve 310 disposed in the discharge port 120, which controls the diameter of the discharge port 120 based on an input electrical signal; and a heating electromagnetic coil 320 disposed in the heating section 130, which controls the temperature of the heating section 130 based on an input electrical signal.

[0027] Specifically, the heating device 100 is used to heat the nasogastric feeding food to prevent it from being easily affected by the ambient temperature during delivery, especially in cold seasons or air-conditioned environments, which can cause the food temperature to drop and lead to diarrhea in patients. The heating device 100 generates heat and transfers it to the nasogastric feeding food, ensuring that the food temperature is maintained within a constant range. This ensures that the temperature of the food delivered to the patient is close to their body temperature, effectively reducing gastrointestinal discomfort caused by a drop in food temperature. A pipe 700, typically made of soft plastic, is fixedly connected to one end of the heating device 100. The pipe 700 serves as a food delivery channel, transporting the heated nasogastric feeding food from the heating device 100 to the patient's stomach. The heating device 100 includes an inlet 110 and an outlet 120. The inlet 110 is used to input the crushed food, water, and medication into the heating device 100, while the outlet 120 transports the processed items from the heating device 100 into the pipe 700 and then to the patient's stomach. The heating device 100 also includes a heating section 130, a conveying section 140, and a feeding chamber 150. Nasal feeding food is fed into the feeding chamber 150 through the feed inlet 110, and then the heating section 130 heats it, while the conveying section 140 stirs and conveys it.

[0028] More specifically, the constant temperature nasogastric feeding device further includes: a detection device 200, used to detect the operating status of the nasogastric feeding device based on an input electrical signal. The detection device 200 includes: a temperature sensor 210, used to detect the temperature of the nasogastric feeding food in the pipe 700; the control device 400 sends a control signal to the execution device 300 based on the control signal sent by the temperature sensor 210 to control the execution device 300; and a flow rate sensor 220, used to detect the flow rate of the nasogastric feeding food in the pipe 700; the control device 400 sends a control signal to the execution device 300 based on the control signal sent by the flow rate sensor 220 to control the execution device 300. A temperature sensor 210 is installed on the pipe 700 to detect the temperature of the nasogastric feeding food flowing in the pipe 700 in real time. After detecting the temperature, the temperature sensor sends an electrical signal to the control device 400. The control device 400 compares and judges the received electrical signal with a set threshold temperature, and then sends an electrical signal to the actuator 300 to control the actuator 300. Similarly, a flow rate sensor 220 is installed at the outlet 120 to detect the flow rate of the nasogastric feeding food in the pipe 700 in real time, and then transmits the signal to the control device 400. The control device 400 compares the received electrical signal with a set flow rate threshold to determine whether the flow rate of the nasogastric feeding food in the pipe 700 is too fast. The control device 400 referred to here is a PLC control chip in the prior art. By installing the temperature sensor 210 and the flow rate sensor 220 on the pipe 700 and controlling the actuator 300 through the control device 400, the patient's comfort after the nasogastric feeding food flows into the stomach is effectively improved.

[0029] The actuator 300 includes a flow control solenoid valve 310 and a heating solenoid coil 320. The control device 400 sends a control signal to the heating solenoid coil 320 based on a control signal sent by the temperature sensor 210. When the temperature sensor 210 detects that the temperature of the nasal-feeding food in the pipe 700 is low, the control device 400 sends a signal to the heating solenoid coil 320 to increase the current, thereby increasing the temperature of the heating solenoid coil 320 and thus raising the temperature of the nasal-feeding food. After receiving the electrical signal from the control device 400, the flow control solenoid valve 310 controls the diameter of the pipe at the outlet 120, thereby controlling the flow rate of the nasal-feeding food flowing out of the outlet 120.

[0030] The control device 400 is used to send a control signal to the flow control solenoid valve 310 according to the control signal sent by the detection to control the actuator 300; the actuator 300 is used to control the operating state of the nasogastric feeding device according to the input electrical signal; wherein, the actuator 300 includes: a flow control solenoid valve 310, which is disposed in the discharge port 120, and controls the size of the discharge port 120 according to the input electrical signal; and a heating solenoid coil 320, which is disposed in the heating part 130, and controls the temperature of the heating part 130 according to the input electrical signal.

[0031] In one specific embodiment, the conveying unit 140 includes a power source 141, a spiral conveyor 142, and a filter screen 143. The power source 141 is fixedly connected to the spiral conveyor 142 to provide power for the rotation of the spiral conveyor 142. The spiral conveyor 142 includes a first conveying unit 142a and a second conveying unit 142b, which are arranged in parallel within the material receiving cavity 150. The filter screen 143 is fixedly disposed between the spiral conveyor 142 and the inner wall of the material receiving cavity 150, and the filter screen 143 is provided with a plurality of filter holes.

[0032] Specifically, the power source 141 is a motor with controllable speed, which controls the rotation speed and direction of the screw conveyor 142. The screw conveyor 142 includes a first conveying unit 142a and a second conveying unit 142b. Both the first conveying unit 142a and the second conveying unit 142b contain a rotating shaft with equally spaced spiral blades. The first conveying unit 142a and the second conveying unit 142b are arranged in parallel. After the operator feeds the nasal feeding food into the feed inlet 110, the power source 141 drives the first conveying unit 142a and the second conveying unit 142b to rotate in opposite directions, thereby conveying the nasal feeding food from one end of the screw conveyor unit to the other end, thus squeezing and mixing the nasal feeding food evenly.

[0033] In one feasible embodiment, the angle between the axis of the spiral conveyor 142 in the material container 150 and the horizontal line ranges from 5° to 15°. That is, the height of the first conveying unit 142a and the second conveying unit 142b in the material container 150 gradually increases. The advantage of this arrangement is that the first conveying unit 142a and the second conveying unit 142b overcome the weight of the nasal feeding food during the conveying process, making the nasal feeding food more thoroughly and evenly mixed. Furthermore, the discharge port 120 and the inlet 110 are located on the same side of the length direction of the material container 150. After the first conveying unit 142a and the second conveying unit 142b convey the nasal feeding food from one end to the other, the power source 141 rotates in the opposite direction, causing the first conveying unit 142a and the second conveying unit 142b to convey the food a second time. At this time, the weight of the nasal feeding food itself also participates in the conveying, thereby enabling better conveying and mixing of the nasal feeding food, making the nasal feeding food even more evenly mixed.

[0034] A filter screen 143 is also provided between the screw conveyor 142 and the inner wall of the feeding chamber 150. The function of the filter screen 143 is to filter out larger particles in the nasogastric feeding food. Since the constant temperature nasogastric feeding device of this application is used for patients who are bedridden at home for a long time, the nasogastric feeding food is generally prepared by the patient's family members by hand. It is difficult to grind the nasogastric feeding food into a very uniform state using ordinary household equipment. At this time, the function of the filter screen 143 is to trap large food residues inside the filter screen and prevent them from entering the nasogastric feeding tube 700 and causing blockage of the nasogastric feeding tube 700. The inner wall of the feeding chamber 150 located on the side of the outlet 120 is inclined, and its tangential angle is equal to the angle between the axis of the screw conveyor 142 in the feeding chamber 150 and the horizontal line. The diameter of the filter screen 143 near the inlet 110 is smaller than the diameter of the filter screen 143 away from the inlet 110. The filter element 143 has several filter holes, and the diameter of the filter element 143 is larger at one end and smaller at the other. When the first conveying unit 142a and the second conveying unit 142b convey food from one end to the other end, the gap between the filter element 143 at the other end and the first conveying unit 142a and the second conveying unit 142b is larger. The first conveying unit 142a and the second conveying unit 142b can squeeze the food as far as possible to the end of the material cavity 150 away from the feed inlet 110. When the power source 141 rotates in the opposite direction, due to the reduction in the diameter of the filter element 143, the food is squeezed on the mesh wall of the filter element 143 during the conveying process of the first conveying unit 142a and the second conveying unit 142b, so that the food can pass through the filter holes on the filter better, thereby improving the stirring and conveying efficiency of the food.

[0035] In one specific embodiment, the constant-temperature nasogastric feeding device further includes: an anti-displacement device 500, which is used to fix the tube 700; the anti-displacement device also includes an infrared transmitter 510 and an infrared receiver 520, wherein the infrared transmitter 510 is fixedly connected to the tube 700, and the infrared receiver 520 is used to receive the infrared rays emitted by the infrared transmitter 510; the control device 400 sends a control signal to the execution device 300 according to the control signal sent by the infrared receiver 520 to control the execution device 300. Specifically, in one possible embodiment, the nasogastric tube 700 is fixed to one side of the patient's nose. The anti-displacement device 500 can detect whether the tube 700 fixed to one side of the patient's nose has been displaced, and sends a signal to the control device 400 in real time to indicate whether the tube 700 has been displaced, in cooperation with the infrared receiver and the infrared transmitter 510.

[0036] In one specific embodiment, the constant temperature nasal feeding device further includes an interactive device 600 for user operation to achieve human-computer interaction; wherein, the control device 400 sends control signals to the execution device 300 based on control signals sent by the interactive device 600. Specifically, the interactive device 600 mainly provides a human-computer interface to facilitate user data settings, and also provides feedback to the user on various data received by the control device 400. As a specific solution, the interactive device 600 can adopt a touch display with a processing chip and memory. The touch screen of the touch display can be used to display data or allow the user to input data by touch. The user can achieve human-computer interaction by operating the instructions on the touch screen. Using a touch screen as the carrier of the interactive module improves the intelligence of human-computer interaction and reduces the difficulty of operation.

[0037] In one specific embodiment, this application provides a control method for a constant-temperature nasal feeding device, executed by the aforementioned constant-temperature nasal feeding device, the control method comprising: Step 1: Obtain the operating status of the constant temperature nasal feeding device in response to the control signal sent by the detection device 200; Step 2: The control device 400 determines, based on the control signal sent by the detection device 200, whether the temperature signal sent by the temperature detection sensor 210 is greater than the set temperature threshold, and / or whether the flow rate signal sent by the flow rate detection sensor 220 is greater than the set flow rate threshold. Step 3: If so, the control device 400 sends a control signal to the flow control solenoid valve 310 to reduce the discharge from the outlet 120 and a control signal to the heating solenoid coil 320 to reduce the temperature of the heating part 130.

[0038] The control method further includes: the control device 400 determines whether it has received infrared rays emitted by the infrared transmitter 510 based on the control signal sent by the infrared receiver 520; otherwise, it sends a control signal to the flow control solenoid valve 310 to close the discharge port 120.

[0039] The constant-temperature nasogastric feeding device control method employs multiple detection devices 200, including a temperature sensor 210 and a flow rate sensor 220, to monitor the temperature and flow rate of the nasogastric feeding solution in real time. These sensors send the detected data to a control device 400, which determines, based on set thresholds, whether to adjust the operating status of the flow control solenoid valve 310 and the heating solenoid coil 320 to ensure that the temperature and flow rate of the nasogastric feeding solution are always at optimal levels. This real-time monitoring and automatic adjustment mechanism significantly improves the safety and effectiveness of the nasogastric feeding process.

[0040] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A constant temperature nasal feeding device, characterized in that: include, A heating device for heating food fed through a nasogastric tube; A pipe for delivering nasal feeding food, one end of which is fixedly connected to the heating device; The heating device includes an inlet, an outlet, a heating section, a conveying section, and a material-containing cavity. The inlet is located at one end of the material-containing cavity, and the outlet is located on the opposite side of the inlet. The heating section and the conveying section are located inside the material-containing cavity. The heating section is used to heat the nasal feeding food fed through the inlet. The conveying section is used to provide power for transporting the food from the heating device to the pipeline. The constant temperature nasal feeding device also includes: The detection device is used to detect the operating status of the nasogastric feeding device based on the input electrical signal; The control device is used to send a control signal to the flow control solenoid valve according to the control signal sent by the detection to control the actuator; An actuator is used to control the operating status of the nasogastric feeding device based on an input electrical signal; The actuator includes: A flow control solenoid valve is disposed in the discharge port, and the flow control solenoid valve controls the size of the discharge port according to the input electrical signal. A heating electromagnetic coil is disposed in the heating part, and the heating electromagnetic coil controls the temperature of the heating part according to the input electrical signal.

2. The constant temperature nasal feeding device according to claim 1, characterized in that: The conveying section includes a power source, a spiral conveyor, and a filter screen. The power source is fixedly connected to the spiral conveyor to provide power for the rotation of the spiral conveyor. The spiral conveyor includes a first conveying unit and a second conveying unit, which are arranged in parallel within the material receiving cavity. The filter screen is fixedly disposed between the spiral conveyor and the inner wall of the material receiving cavity, and the filter screen has a plurality of filter holes.

3. The constant temperature nasal feeding device according to claim 2, characterized in that: The angle between the axis of the spiral conveyor in the material cavity and the horizontal line ranges from 5° to 15°.

4. The constant temperature nasal feeding device according to claim 3, characterized in that: The inner wall of the material receiving cavity is inclined on the side of the discharge port, and its tangential angle is equal to the angle between the axis of the spiral conveyor in the material receiving cavity and the horizontal line.

5. The constant temperature nasal feeding device according to claim 4, characterized in that: The diameter of the filter element near the feed inlet is smaller than the diameter of the filter element away from the feed inlet.

6. The constant temperature nasal feeding device according to any one of claims 2 to 5, characterized in that: The constant temperature nasal feeding device also includes: An anti-displacement device, used to fix the pipeline; The anti-positioning device also includes an infrared transmitter and an infrared receiver, wherein the infrared transmitter is fixedly connected to the pipe, and the infrared receiver is used to receive the infrared rays emitted by the infrared transmitter. The control device sends control signals to the actuator based on the control signals sent by the infrared receiver in order to control the actuator.

7. The constant temperature nasal feeding device according to claim 6, characterized in that: The detection device includes: A temperature sensor is used to detect the temperature of the nasogastric feeding food in the tube; The control device sends a control signal to the execution device based on the control signal sent by the temperature detection sensor in order to control the execution device. A flow rate detection sensor is used to detect the flow rate of nasogastric feeding food in the pipe; The control device sends a control signal to the actuator based on the control signal sent by the flow rate detection sensor in order to control the actuator.

8. The constant temperature nasal feeding device according to claim 7, characterized in that: The constant temperature nasal feeding device also includes: Interactive devices are used by users to achieve human-computer interaction. The control device sends a control signal to the execution device based on the control signal sent by the interaction device.

9. A method for controlling a constant-temperature nasal feeding device, characterized in that: Performed by the constant temperature nasogastric feeding device according to any one of claims 1 to 8, the control method comprises: Step 1: Obtain the operating status of the constant temperature nasal feeding device in response to the control signal sent by the detection device; Step 2: The control device determines, based on the control signal sent by the detection device, whether the temperature signal sent by the temperature detection sensor is greater than the set temperature threshold, and / or whether the flow rate signal sent by the flow rate detection sensor is greater than the set flow rate threshold. Step 3: If so, the control device sends a control signal to the flow control solenoid valve to reduce the discharge from the outlet and a control signal to the heating solenoid coil to reduce the temperature of the heating section.

10. The control method for the constant temperature nasal feeding device according to claim 9, characterized in that: The control method further includes: The control device determines whether it has received infrared rays emitted by the infrared transmitter based on the control signal sent by the infrared receiver. If not, it sends a control signal to the flow control solenoid valve to close the discharge port.

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