JPH0342932Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a heating and humidifying device for adjusting the temperature and humidity of breathing gas to a suitable state when using anesthesia machines, artificial respirators, etc. on patients. It is something.

(Prior Art) Generally, when a patient is being breathed by an anesthesia machine or artificial respirator, heated and humidified breathing gas is used, not only to avoid discomfort to the patient, but also to avoid problems that may harm the patient's lungs. It is known that it is necessary to send For this reason, various devices have been used to heat and humidify breathing gas before delivering it to the patient. For example, a bubbling type device that passes breathing gas through warm water and adds the necessary humidity to the bubbles when the breathing gas bubbles out from the water, and a device that absorbs moisture by soaking hygroscopic paper or nonwoven fabric in hot water. There are commercially available devices that impart the necessary humidity to the breathing gas by passing the gas through it.

However, these devices (1) pose a risk of infection even though they use sterile water; (2) The surface area of the heating and humidifying part is small and sufficient performance cannot be obtained. (3)
The amount of compression changes as the water level in the heating and humidifying section changes.
There were problems such as. As a device that solves the problems of such conventional devices, an inlet and an outlet for breathing gas are provided at both ends of a container containing a large number of hollow fibers whose ends are bonded together, and an inlet and an outlet for hot water are provided on the side wall of the container. An apparatus has been proposed in which a membrane module is attached to a breathing gas flow path, and the breathing gas is heated and humidified through a hollow fiber while circulating hot water through the membrane module (Japanese Patent Application Laid-open No. 83190/1983).

(Problems to be solved by the invention) The above-mentioned heating and humidifying device using hollow fibers is superior in terms of safety and operability compared to conventional devices, but the water tank and membrane module are separated from each other. Because of this, there were problems in handling, such as the breathing gas flow path and hot water flow path intersecting in a complicated manner. There was also a problem in that the liquid inside the membrane module leaked out when the membrane module was removed.

Therefore, an object of the present invention is to provide a heating humidifier that does not cause liquid to flow out when removed and is easy to handle.

(Means for Solving the Problems) That is, the present invention provides an inlet port and an outlet port for breathing gas at both ends of a flat horizontal housing that accommodates a large number of hollow fibers whose ends are bonded together. A membrane module with a hot water outlet port and a hot water inlet port with a check valve installed at symmetrical positions above and below, and a side surface of a U-shaped casing that houses a hot water tank with a heater attached and a pump. A hot water inlet port is connected to the hot water tank via the first tube, and a hot water outlet port is connected to the pump connected to the hot water tank via the second tube, at vertically symmetrical positions in the space formed in the above. The main body of the device has an opening and the hot water outlet port is fixed to a spring that presses the top surface of the membrane module housed in the space, and the membrane module is housed in the space formed on the side of the housing. The hot water inlet port of the membrane module and the hot water outlet port of the device body are removably connected, and the hot water inlet port of the device body is fluid-tightly connected by a spring that presses the top surface of the membrane module when This heating and humidifying device is characterized in that it is configured such that a hot water circulation path is formed between a hot water tank and a membrane module.

(Function) In the device of the present invention, when a flat housing-shaped membrane module is housed in the space formed on the side surface of the U-shaped housing, a spring attached to the housing connects the hot water inlet port of the membrane module. The hot water circulation flow path is simplified because the and outlet ports are removably connected to the hot water inlet port and outlet port of the equipment main body, and by providing a check valve on the hot water inlet port of the membrane module, the membrane module can be easily connected to the equipment main body. This prevents hot water from flowing out of the membrane module when it is removed from the membrane module.

(Example) Next, an example of the device of the present invention will be described with reference to the drawings. Figure 1 shows membrane module 1 used in the device of the present invention.
2, a large number of hollow fibers 3 are accommodated in a housing 2 whose upper and lower parts are flat, and both ends of the hollow fibers are bundled and fixed with an adhesive. A breathing gas inlet port 4 and an outlet port 5 are provided at both open ends of the housing. Further, a hot water outlet port 6 is provided on the upper surface of the housing, and a hot water inlet port 7 is provided on the lower surface of the housing at vertically symmetrical positions. A check valve is attached to the hot water inlet port 7 to prevent the hot water in the housing from flowing out when the membrane module 1 is removed from the main body of the apparatus. As such a check valve, one having a known structure such as a ball type or a seat type can be used.

The hollow fibers housed in the membrane module are water vapor permeable hollow fibers, and usually a diaphragm membrane made of regenerated cellulose or the like or an ultrafiltration membrane made of polysulfone or the like is used.

FIG. 2 is a perspective view showing a part of the internal structure of the main body of the device.
A sealed hot water tank 15 is housed therein. A pump 12 is attached to the top of the hot water tank, and an inlet of the pump opens into the hot water tank. Further, the discharge port of the pump is connected via a second tube 23 to a hot water outlet port 17 that opens at the bottom of a space formed on the side surface of the U-shaped housing. Further, a plate-shaped spring 16 is attached to the upper part of the space so as to bias it downward. A hot water inlet port 18 is attached to the end of the spring, and the hot water outlet port is connected to the hot water tank 15 via a first tube 24 . 13 is a make-up water inlet port, the end of which opens into the hot water tank. The make-up water inlet port also serves as a liquid inlet to the hot water tank. If a replenishment water bag is connected to this port, the hot water tank can be automatically replenished with any liquid that is insufficient during treatment. Reference numeral 14 denotes an air vent valve, which can be opened to expel the air in the hot water tank and membrane module to inject make-up water into the hot water tank, or remove the plug 19 to drain the liquid in the hot water tank and membrane module. It is used when 3 and 4 illustrate the operation of the spring 16 for liquid-tightly engaging the hot water outlet port 18 of the device body and the hot water outlet port 6 of the membrane module when the membrane module 1 is housed in the device body. is a diagram,
When the membrane module is inserted into the device body, the third
As shown in the figure, the spring is pressed upward by a protrusion 9 provided on the top surface of the membrane module. At this time, the hot water inlet port 7 of the membrane module is engaged with the hot water outlet port 17 of the main body of the apparatus. When the membrane module is further inserted, the protrusion 9 is removed from the spring and located in the notch of the spring. At this time, the spring is urged downward, and the hot water inlet port 18 fixed to the spring is fluid-tightly connected to the hot water outlet port 6 of the membrane module. Moreover, the membrane module pressed downward by the action of the spring also connects the hot water inlet port 7 and the hot water outlet port 17 of the main body of the device in a fluid-tight manner (Fig. 4), forming a hot water circulation flow path between the hot water tank and the membrane module. Ru.

FIG. 5 is a perspective view showing the membrane module 1 housed in the main body of the device. Breathing gas is supplied from the breathing gas inlet port 4 of the membrane module into the hollow fibers of the membrane module, and is heated and humidified with hot water. Post-breathing gas is supplied to the patient through outlet port 5. 2
5 is a make-up water bag connected to the make-up water port 13.

(Effects of the Invention) As described above, the device of the present invention is an easy-to-handle device in which a hot water circulation channel can be easily formed by inserting the membrane module into an opening provided on the side of the device body.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a membrane module used in the device of the present invention, and FIG. 2 is a perspective view of the device main body.
3 and 4 are sectional views illustrating the operation of the spring, and FIG. 5 is a perspective view illustrating the device of the present invention in use. 1... Membrane module, 2... Housing, 3...
...Hollow fiber, 4...Respiratory gas inlet port, 5...Respiratory gas outlet port, 6...Hot water outlet port, 7...
... Hot water inlet port, 11 ... Heater, 12 ... Pump, 15 ... Hot water tank, 16 ... Spring, 17 ... Hot water outlet port, 18 ... Hot water introduction port.

Claims (1)

[Scope of utility model registration request] A flat horizontal housing containing a large number of hollow systems with both ends glued together is provided with a breathing gas inlet port and an outlet port at both ends, and a hot water outlet port and a check valve are installed at vertically symmetrical positions on the side wall of the housing. a membrane module with an inlet port for heated water;
A hot water introduction port is connected to the hot water tank via a first tube at vertically symmetrical positions in a space formed on the side of a U-shaped housing that houses a hot water tank with a heater attached and a pump. Then, a hot water outlet port connected to a pump connected to the hot water tank via a second tube is opened, and the hot water outlet port is connected to a spring that presses the upper surface of the membrane module housed in the space. When the membrane module is housed in the space formed on the side of the housing, a spring that presses the top surface of the membrane module connects the hot water inlet port of the membrane module to the hot water outlet port of the device body. A heating humidifier characterized in that the hot water outlet port of the membrane module and the hot water inlet port of the device body are removably connected liquid-tightly to form a hot water circulation path between the hot water tank and the membrane module. Device.