A humidifying and heating system for a ventilator

Abstract

The present invention relates to the field of medical devices, and in particular to a humidification and heating system for a ventilator, including a mechanical atomizing humidifier, one interface of which is connected to the ventilator, and another interface of which is connected to a breathing circuit, and a heating mechanism is provided on the breathing circuit. After adopting the above scheme, the generation of condensed water is fundamentally eliminated, and the relative temperature and humidity of the gas can still be transmitted to critically ill patients.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, in particular to a humidifying and heating system for a ventilator. Background Art

[0002] Critically ill patients in the ICU ward basically need to use a ventilator, but because the patient's self-breathing ability is exhausted, the input gas goes directly into the lungs without being regulated by the human nasal cavity. Therefore, before the gas in the ventilator enters the human body, it needs to be heated and humidified to reduce the burden on the patient. Traditional humidification systems generally heat and evaporate water to produce water vapor, and then mix the water vapor and oxygen for humidification. In this humidification method, when the humidified mixed gas enters the breathing circuit, the temperature is relatively high. When the gas is transmitted and moved in the tube cavity, the gas temperature gradually decreases due to the influence of the ambient temperature. When the gas temperature drops below the dew point temperature, a large amount of condensed water will be generated in the tube cavity. Although Heating wires are also installed in the breathing circuit of this humidification system to heat and insulate the pipeline, but the temperature of the gas coming out of the humidification tank is relatively high. When it is transported in the pipeline, condensation water will be produced as the temperature drops below the dew point temperature. If condensation water is to be avoided in the lumen, the temperature in the lumen must always be controlled above the above temperature. However, the suitable breathing temperature for the human body is 32-37°C. Too high a temperature will increase the physical burden of critically ill patients and affect treatment. Condensation water in the lumen is not only easy to breed bacteria, but may also block the breathing circuit and enter the trachea of ​​critically ill patients, which may endanger the life safety of critically ill patients. Although the ICU ward adopts 24-hour monitoring, the presence of condensation water will always endanger the safety of patients.

[0003] In 201720986639.0, a condensation water alarm is used. When condensation water accumulates in the breathing duct and hinders normal breathing, an alarm is sounded to remind critically ill patients or users to ensure normal use. However, this method does not fundamentally solve the problem of condensation water generation. Therefore, the inventor conducted further research on this and developed a humidification and heating system for a ventilator, which resulted in this case. Summary of the invention

[0004] The purpose of the present invention is to provide a humidifying and heating system for a ventilator, which fundamentally eliminates the generation of condensed water and can still maintain relative temperature and humidity for gas transmission to critically ill patients.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A humidifying and heating system for a ventilator comprises a mechanical atomizing humidifier, one interface of the mechanical atomizing humidifier is connected to the ventilator, the other interface of the mechanical atomizing humidifier is connected to a breathing circuit, and a heating mechanism is arranged on the breathing circuit.

[0007] Mechanical atomizing humidifiers produce water mist through mechanical vibration. The temperature of the water mist itself is relatively low. In the subsequent breathing circuit, when it is heated by the heating mechanism and raised to the temperature required by the human body, no condensed water will be produced.

[0008] Furthermore, an enhanced heating device is provided at the interface where the mechanical atomizing humidifier is connected to the breathing circuit.

[0009] Since the temperature at the outlet of the humidified gas is relatively low, the air's ability to contain fog is very weak at this temperature, which is insufficient to dissolve all the generated fog. It is necessary to add an enhanced heating device at the fog outlet. The purpose of the enhanced heating device is to instantaneously heat the fog and air mixture at the outlet so that the generated fog can quickly blend into the air.

[0010] If the heating device is not strengthened, due to the relatively low temperature at the mist outlet, most of the mist generated does not merge into the air, but is free in the air. The temperature inside the breathing circuit is affected by the mist with a lower temperature at the front end, making the temperature at the front end of the breathing circuit lower than that at the back end. When the mist moves in the breathing circuit section with a lower temperature, the free mist will collide with the tube wall and condense into small water droplets.

[0011] Furthermore, the mechanical atomizing humidifier is an ultrasonic humidifier or an air compression humidifier.

[0012] Ultrasonic humidifiers use electric energy to drive piezoelectric ceramics to emit ultrasonic waves, which resonate with the inherent oscillation frequency of the piezoelectric ceramics through a certain oscillation circuit to break up the water and produce mist-like water particles; air compression humidifiers use high-speed airflow to create negative pressure in the water supply nozzle, and suck water to the end face. The airflow hits the water to produce mist-like water particles, thereby achieving the purpose of humidification; that is, as long as the humidifier does not generate heat to raise the water mist, it can be used in this system.

[0013] Furthermore, the breathing circuit is a Y-shaped pipeline, including a breathing tube connected to the critically ill patient, an air inlet pipe connected to the mechanical atomizing humidifier, and an air outlet pipe for discharging waste gas from the critically ill patient.

[0014] Furthermore, a temperature sensor is arranged near the breathing tube, and the heating mechanism is a heating wire, which is arranged inside, outside or in the interlayer of the air inlet pipe and the air outlet pipe.

[0015] It ensures that the mixed air inhaled by critically ill patients is heated to a temperature suitable for the human body after humidification. Since the temperature inside the tube is heated, it is higher than the air temperature in the humidifier, so no condensation water is produced.

[0016] Furthermore, a temperature sensor is provided near the breathing tube, and the heating mechanism is thermal radiation heating.

[0017] The purpose of the present application can also be achieved by infrared or electromagnetic heating.

[0018] Furthermore, a flow sensor is provided at the interface between the mechanical atomizing humidifier and the air inlet pipe.

[0019] Furthermore, the enhanced heating device comprises a shell, a mesh heating sheet is arranged in the shell, and a heat insulation film is arranged between the mesh heating sheet and the shell.

[0020] The chamber in the enhanced heating device is heated by a mixture of mist and air, which rapidly heats the air and accelerates the dissolution of the mist, so that the dry air can carry more water vapor into the breathing duct.

[0021] After adopting the above scheme, the present invention has the following advantages compared with the prior art:

[0022] Water is atomized without heating and mixed with dry oxygen to produce oxygen suitable for human breathing. A heating mechanism is designed in the breathing circuit to heat and insulate the oxygen with moisture, so that the oxygen entering the human respiratory tract is maintained at a suitable temperature. Since the gas humidified first will not generate high temperature, and the subsequent heating temperature is higher than the previous moisture, the generation of condensed water is fundamentally eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the present invention;

[0024] Figure 2 yes Figure 1 A top view of

[0025] Figure 3 It is a schematic diagram of a heating mechanism using a built-in heating wire;

[0026] Figure 4 yes Figure 3 A top view of

[0027] Figure 5 is a schematic diagram of an enhanced heating device;

[0028] Figure 6 It is one of the schematic diagrams of the mesh heating sheet;

[0029] Figure 7 This is the second schematic diagram of the mesh heating sheet;

[0030] Description of symbols

[0031] Ultrasonic humidifier 1, humidifying tank 11, breathing tube 2, air inlet pipe 3, air outlet pipe 4, temperature sensor 5, heating wire 6, flow sensor 7, enhanced heating device 8, shell 81, mesh heating sheet 82, thermal insulation film 83. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] As shown in the figure, a humidifying and heating system for a ventilator is used. In this embodiment, an ultrasonic humidifier 1 is used. One of the interfaces of the ultrasonic humidifier 1 is connected to the ventilator, and the other interface of the ultrasonic humidifier 1 is connected to the breathing circuit. The ventilator inputs dry oxygen into the humidification tank 11 of the ultrasonic humidifier 1, and the humidity of the dry oxygen is adjusted in the humidification tank 11 with the help of the water mist generated by the ultrasonic humidifier 1, and the humidified oxygen enters the breathing circuit from the other interface.

[0034] An enhanced heating device 8 is provided at the interface where the ultrasonic humidifier 1 is connected to the breathing circuit. A heating element with a three-dimensional mesh structure is provided inside. Since the temperature at the outlet of the humidified gas is relatively low, the air's ability to accommodate mist at this temperature is very weak and is insufficient to dissolve all the generated mist. It is necessary to add an enhanced heating device 8 at the mist outlet. The purpose of the enhanced heating device 8 is to instantaneously heat the mist and air mixture at the outlet of the ultrasonic humidifier 1 so that the generated mist can be quickly integrated into the air. The enhanced heating device 8 includes a shell 81, in which a mesh heating sheet 82 is provided. An insulating film 83 is provided between the mesh heating sheet 82 and the shell 81. A plurality of mesh heating sheets 82 are stacked together to form a three-dimensional heating network to heat the mist and air in all directions. Each mesh heating sheet 82 has many micropores to facilitate the passage of mist and air. The mesh heating sheet 82 has various forms (see Figure 6 , Figure 7 ).

[0035] If the heating device 8 is not strengthened, since the temperature at the mist outlet is relatively low, most of the mist generated does not merge into the air, but is free in the air. The temperature inside the breathing circuit is affected by the mist with a lower temperature at the front end, making the temperature at the front end of the breathing circuit lower than that at the rear end. When the mist moves in the breathing circuit section with a lower temperature, the free mist will collide with the tube wall and condense into small water droplets.

[0036] The breathing circuit is a Y-shaped pipeline, including a breathing tube 2 connected to the critically ill patient, an air inlet pipe 3 connected to the ultrasonic humidifier 1, and an air outlet pipe 4 for exhausting the waste gas of the critically ill patient. A flow sensor 7 is provided at the interface between the ultrasonic humidifier 1 and the air inlet pipe 3, and the flow sensor 7 is used to monitor the flow and pressure of oxygen.

[0037] A heating wire 6 is arranged throughout the breathing circuit, and both ends of the heating wire 6 are connected to a power source. A temperature sensor 5 is arranged near the breathing tube 2. The temperature sensor 5 is used to detect whether the temperature of the air entering the body of the critically ill patient is appropriate. Since the entire breathing circuit is within the heating range of the heating wire 6, there will be no condensation water caused by cooling in the middle.

[0038] Through the above scheme, water is atomized in a non-heating manner and mixed with dry gas to produce air suitable for human breathing. A heating mechanism is designed in the breathing circuit to heat and insulate the oxygen that has passed through the moisture, so that the oxygen entering the human respiratory tract is maintained at a suitable temperature. Since the gas that has been humidified first will not generate high temperature, and the subsequent heating temperature is higher than the previous moisture, the generation of condensed water is fundamentally eliminated.

[0039] The above are only specific embodiments of the present invention. At the same time, all words such as "upper, lower, left, right, middle" involved in the present invention are for reference only and are not absolute limitations. Any non-substantial changes made using the present invention shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A humidifying and heating system for a ventilator, characterized in that: It includes a mechanical atomizing humidifier, one of the interfaces of the mechanical atomizing humidifier is connected to the ventilator, and the other interface of the mechanical atomizing humidifier is connected to the breathing circuit, and a heating mechanism is provided on the breathing circuit; wherein, an enhanced heating device is also provided at the interface where the mechanical atomizing humidifier is connected to the breathing circuit, and the enhanced heating device includes a shell, a mesh heating plate is provided in the shell, and a heat insulating film is provided between the mesh heating plate and the shell, and a plurality of mesh heating plates are stacked together to form a three-dimensional heating network.

2. A humidifying and heating system for a ventilator according to claim 1, characterized in that: The mechanical atomizing humidifier is an ultrasonic humidifier or an air compression humidifier.

3. A humidifying and heating system for a ventilator according to claim 1, characterized in that: The breathing circuit is a Y-shaped pipeline, including a breathing tube connected to the critically ill patient, an air inlet pipe connected to a mechanical atomizing humidifier, and an air outlet pipe for exhausting waste gas from the critically ill patient.

4. A humidifying and heating system for a ventilator according to claim 3, characterized in that: A temperature sensor is arranged near the breathing tube, and the heating mechanism is a heating wire, which is arranged inside, outside or in the interlayer of the air inlet pipe and the air outlet pipe.

5. A humidifying and heating system for a ventilator according to claim 3, characterized in that: A temperature sensor is arranged near the breathing tube, and the heating mechanism is thermal radiation heating.

6. A humidifying and heating system for a ventilator according to claim 3, characterized in that: A flow sensor is provided at the interface between the mechanical atomizing humidifier and the air inlet pipe.

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