JP2654887B2 - Humidifier with additional condensation sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dew condensation sensor that can be incorporated into all medical devices requiring humidification, such as artificial respirators, intermittent positive pressure respirators, anesthesia machines, and flow meters for oxygen therapy. It relates to a heating humidifier.

[0002]

2. Description of the Related Art The inhalation gas supplied from a respirator or the like is a dry room temperature gas, and if it is inhaled by a patient as it is, it causes damage to the bronchi and alveoli. Therefore, the supply of dry low-temperature gas using a heating humidifier is normally prevented.

FIG. 12 shows a humidifier which does not incorporate a hose heater and does not actively control humidification. A water tank A is heated by a heater B. The temperature of the heater B is controlled by a bimetal thermostat or the like. The thermostat can be adjusted with a temperature adjustment knob C, and can change the water temperature. There is no particular control of humidity. This warming humidifier is placed near an artificial respirator or the like, and is connected to the patient by an inspired flexible pipe D of about 1.5 to 2 m. Normally, the room temperature is lower than the intake gas temperature, so that the intake gas in the intake coil is cooled by the outside air. The amount of saturated steam decreases as the temperature decreases.
Therefore, the high-temperature intake gas which has been saturated with water vapor and exited the humidifier cannot contain the water vapor that could be contained before when cooled. Water vapor corresponding to the difference between the amount of saturated water vapor at the humidifier outlet temperature and the amount of saturated water vapor at the temperature after cooling becomes liquid and condenses in the intake pipe. When reaching the patient's mouth, the temperature of the inhaled gas decreases and the absolute humidity also decreases by the amount lost as condensation. In FIG. 12, 50 ° C.
When the intake gas saturated with 82.7 mg / L of water vapor is cooled to 32 ° C. in the intake coil D, the saturated water vapor amount becomes 33.4 mg / L, and the difference between the saturated water vapor amounts The corresponding 49.3 mg of water (per liter of inhaled gas) is shown condensing in the circuit. When used for a patient, the thermostat temperature of the water tank is set high so that sufficient water can be humidified when reaching the mouth of the patient in consideration of the temperature drop and the amount of water vapor lost as condensed water. For the adjustment of the humidification, the doctor appropriately adjusts the thermostat temperature while looking at the intake thermometer provided near the patient. The advantage of this heating humidifier is that the relative humidity is always 100% because the dew condensation starts from the supersaturated state of the suction gas. Therefore, if the temperature of the inhaled gas at the time of reaching the patient is known, the absolute humidity can be calculated, and the absolute humidity can be guaranteed by monitoring the temperature. On the other hand, the drawback is that the cooling of the intake coil is a passive phenomenon, which is affected by the ambient temperature of the surroundings and the flow rate of the intake gas. In addition, even though the temperature of the intake gas is monitored, it is not a continuous feedback control but an off-line control performed manually.Therefore, the management of the intake air temperature becomes uneven, resulting in excessive humidification due to intake air temperature rise and insufficient humidification due to temperature decrease. The danger always exists. In some cases, prolonged inhalation of hot inhaled gas may cause a rise in body temperature and airway burns.
Since it is a structure that generates a large amount of dew, there are many disadvantages due to storage of condensed water.

FIG. 13 does not incorporate a hose heater, but measures the temperature of the inhaled gas at the patient's mouth with a thermistor F and feeds back the signal via the controller E to adjust the temperature of the main heater B. The humidifier is a warm humidifier.
It is similar to that described above, but the uncertainty of humidification is eliminated by automating the control of the inhalation gas temperature at the patient's mouth, which was one of the problems of the humidifier, using negative feedback. . In this humidifier, although the temperature and humidity of the inhaled gas supplied to the patient are stable, a large amount of condensed water is still generated.

FIG. 14 shows a humidifier with a built-in hose heater. The generation of steam by the water tank module A and the main heater B is the same as that of the above two examples. In the heating humidifier shown in FIG. 12, the inhaled gas is cooled in the intake coil, and when the gas reaches the patient, the temperature and the temperature are reduced.
There is a drawback that the humidity is not guaranteed, and the heating humidifier of FIG. 13 was developed to improve it. However, the disadvantage of generating large amounts of condensed water remained. FIG. 14 was developed mainly to reduce the condensed water. The principle of operation is to insert a linear heating element called a hose heater G into the intake coil to keep the intake gas warm, thereby preventing the temperature of the intake gas from dropping and preventing dew condensation. FIG. 14 shows a state in which the inhaled gas saturated at 32 ° C. at the outlet of the humidifier reaches the patient while maintaining the temperature and humidity as it is because it is kept warm by the hose heater. The principle of humidity control is as follows. Thermistors F and H are placed at two locations, a humidifier outlet and a patient mouth, as shown in FIG. 14, and the output of the main heater B is adjusted so that the temperature of the thermistor F becomes a desired temperature. The output of the hose heater G is adjusted so that the temperature of the thermistor H becomes equal to the temperature of the thermistor F.

The above is a classification of the conventional humidifiers from the viewpoint of humidification control. The advantages and disadvantages of each are summarized below. (1) In a humidifier that does not incorporate a hose heater and does not actively control humidification as shown in FIG. 12, the relative humidity always becomes 100%, but a large amount of condensed water is generated in the circuit. Even if the relative humidity is 100%, if the temperature at the mouth of the patient is not constantly monitored, there is a risk of lowering the absolute humidity for lowering the temperature, excessive humidification for raising the temperature, increasing the body temperature, and causing airway burns. (2) The humidifier which does not incorporate the hose heater of FIG. 13 but controls the temperature of the main heater by feeding back the temperature of the inhaled gas at the mouth of the patient has a relative humidity of 10%.
Since the temperature at the mouth of the patient is kept constant, the supply absolute humidity is also kept constant. There is no danger of excessive or insufficient humidification, abnormal rise in body temperature and airway burns. However, large amounts of condensed water still form in the circuit. (3) In the humidifier having a built-in hose heater shown in FIG. 14, the condensed water in the circuit is not generated and the humidity is often maintained. Humidification is often insufficient due to sudden factors such as only a part of the coil being cooled for air conditioning and condensing water vapor. Each of them has advantages and disadvantages, and may be excessive. Therefore, when sufficient humidification is necessary, FIGS.
If you want to reduce the condensed water in the intake circuit because the humidification may be slightly insufficient, see Fig. 1 with a hose heater.
At present, it is used separately from those shown in FIG.

[0007]

First, a humidifier which does not incorporate a hose heater and does not actively control humidification as shown in FIG. 12 does not allow the suction gas to be cooled by outside air in the intake pipe. It is assumed. Therefore, when the ambient temperature decreases, the cooling is performed more strongly, and the temperature when finally reaching the mouth of the patient decreases, and the absolute humidity decreases. In addition, if the ventilation volume decreases, the intake gas flows slowly in the intake coil, and the cooling time becomes longer. Also in this case, the temperature of the inhalation gas supplied to the patient decreases, and the absolute humidity also decreases. As the intake gas temperature decreases, the amount of saturated steam also decreases. Therefore, the excess water vapor becomes liquid and condenses in the intake coil. What happens because the humidifier body is separated from the patient, it is not practically possible to place a large object such as a humidifier right next to the patient. In the case of this humidifier, a gas temperature of about 50 ° C. is required at the outlet of the humidifier in order to send an inhalation gas of 32 ° C. and 100% water vapor saturation to the mouth of the patient. 82. Inhaled gas at a gas temperature of 50 ° C and a relative humidity of 100%
Although it contains 7 mg / L of water vapor, when cooled to 32 ° C. when reaching the patient, the saturated water vapor amount at 32 ° C. is 33.4 mg / L, which is 49.3 mg corresponding to the difference.
Will be condensed in the circuit per liter of intake gas. 247m / min for artificial respiration with minute ventilation of 5L / min
g of 14.8 g of condensed water per hour will be stored. When a continuous positive airway pressure method (one method of respiratory management using a ventilator) is performed using a steady flow of 30 L per minute, condensed water of 1.48 g per minute and 88.7 g per hour is generated. Will be. When condensed water accumulates in the circuit, the lumen of the intake circuit narrows and circuit resistance increases. This causes inspiratory resistance during spontaneous breathing and increases the work of breathing, increasing the burden on the patient. The pooled water and the warmed moderate temperature provide a suitable medium for bacterial growth. When the patient changes position or moves the inspiratory coil, the stored water may be injected into the patient's trachea along with the flow of inhaled gas, which hinders the patient's breathing and gas exchange. At this time, if the stored water is contaminated with bacteria, it causes pneumonia. The consumption of distilled water for humidification also increases, which is uneconomical, and the labor required for replenishing the distilled water and discarding the water stored in the coil increases. When the water in the circuit is discarded, the circuit may be disconnected once, during which the patient cannot breathe. Also, disconnecting the circuit increases the chances of bacterial contamination from the surroundings.

Next, although the hose heater of FIG. 13 is not built in, a humidifier that adjusts the temperature of the main heater by feeding back the temperature of the inhaled gas at the mouth of the patient has a relative humidity of 1
Since the temperature at the mouth of the patient is kept constant, the supply absolute humidity also becomes constant. There is no danger of excessive or insufficient humidification, abnormal rise in body temperature and airway burns. However, the structure in which the intake gas is cooled from the outside in the intake tube is the same as that of FIG. 12, and a large amount of condensed water is generated in the circuit. The problem of condensed water storage is the same as that of FIG. 12, and the circuit contamination by bacteria, the occurrence of pneumonia, the increase in respiratory work due to the increase in circuit resistance, the uneconomical effect of using a large amount of sterilized distilled water,
There are dangers such as an increase in nursing care for replenishing distilled water and discarding condensed water in the circuit, and preventing the patient from breathing by temporarily removing the circuit.

Further, the humidifier having a built-in hose heater shown in FIG. 14 produces an inhalation gas saturated to 100% at a target temperature by a main heater, and keeps the temperature of the inhalation gas by a hose heater so as to keep a patient's temperature from dropping. In theory, the absolute humidity should not decrease without condensation. However, in order for this to be realized, it must be an environment with some conditions. First, (1) the humidification capacity of the main heater and the water tank must be sufficient and the outlet of the water tank must be 100% saturated. As shown in FIG. 15, the relative humidity at the outlet of the water tank is 80%.
If this is the case, it will be 80% even at the patient's mouth where the temperature is maintained as it is. Next, (2) the heating capacity of the main heater is sufficient, and the suction gas must be already heated to the target temperature at the outlet of the water tank. As shown in FIG.
Even if the gas temperature is 00%, the absolute humidity is 27.2 mg / L if the gas temperature is 28 ° C., and if the gas temperature is 32 ° C. by heating with a hose heater, the saturated steam amount is 33.4 mg / L.
mg / L, the relative humidity drops to 81%. Third, (3) the ambient temperature around the intake coil is uniform,
It must not be locally cooled or heated on the way. As shown in FIG. 17, even if the water is heated and humidified at 32 ° C. and 100% at the outlet of the water tank, if it is locally cooled to 28 ° C. on the way, it corresponds to the difference in the amount of saturated steam at that part.
2 mg of dew is generated per liter of inhaled gas, and the absolute humidity is 2
It will be reduced to 7.2 mg / L. When this is reheated to 32 ° C. by the hose heater and reaches the patient, the relative humidity will be 81%. Fourthly, (4) the thermistor part for measuring the intake gas temperature must be in the same temperature environment as the surroundings. When the part of the thermistor for measuring the inhalation gas temperature at the mouth of the patient is locally heated as shown in FIG. 18, the control device determines as if the output of the hose heater is sufficient,
Turn off the output of the hose heater. Then, the temperature in the front intake coil becomes lower. If the temperature drops to 28 ° C., 6.2 mg corresponding to the difference in the amount of saturated steam in that portion.
Condensation occurs per liter of inhaled gas and the absolute humidity is 27.2.
mg / L. If this is heated to 32 ° C. when it reaches the patient, the relative humidity will be 81%. These things are happening in reality. In the conventional humidifier, the heating and humidification of the suction gas of 20 L / min or more cannot be sufficiently performed, and thus the situations (1) and (2) occur. Also, part of the air is cooled by the airflow of the air conditioner, so that the condition (3) occurs. Furthermore, in premature babies, newborn babies, hypothermic patients, etc., the body is often heated by irradiating infrared rays to maintain body temperature. ) Situation happens. As described above, incorporating a hose heater is a necessary and effective means to prevent and reduce dew condensation, but the reliability of humidification is reduced, and insufficient humidification may occur due to the surrounding environmental temperature and the amount of intake gas flow. There were problems that were likely to occur.

The performance required of a humidifier is to convert a dry gas at room temperature at a flow rate of up to about 30 l / min into a gas at about 34 ° C. which is humidified and humidified and saturated with steam. . On the other hand, excessive humidification may cause dew condensation in the circuit, which may cause bacterial growth or erroneously inject dew water into the respiratory tract. Therefore, humidification in a heating humidifier is inappropriate even if it is excessive, and appropriate humidification with a relative humidity of about 95 to 100% is required. However, conventionally, a large amount of condensed water is generated in a circuit unless a hose heater is used to ensure humidification, and if a hose heater is used to reduce condensed water, humidification becomes uncertain. Had a problem. The present invention has been made to solve these two conflicting problems at the same time.

The present invention enhances the stability of supply humidity by using a dew sensor for controlling humidity, which is the most important for a heating humidifier. It is an object of the present invention to provide a humidifying humidifier having humidifying performance that is not affected by a change in environmental temperature.

[0012]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and employs the following means. The present invention provides a water tank module 1 for heating and humidifying by introducing an inhalation gas supplied from an artificial respirator or the like, and a main heater 2 for heating water in the water tank to generate steam. The water vapor generated in the inside can be freely supplied to the patient through the inhalation coil 3, and a hose heater 4 composed of a linear heating element is inserted and provided in the inhalation coil 3 connected to the water tank module 1. The temperature of the suction gas in the suction pipe 3 is kept constant to prevent a decrease in the temperature of the suction gas and the occurrence of dew condensation, and the temperature of the suction gas is measured by a thermistor 5 provided at the mouth of the patient of the suction pipe 3. The output of the hose heater 4 can be adjusted via the heater controller 6, the humidity of the inhaled gas is measured by the dew condensation sensor 7 provided at the mouth of the patient of the intake coil 3, and the humidity of the inhaled gas is measured via the main heater controller 8. Main Te heater 2
Is characterized in that the output is adjustable.

[0013]

What is important when using a warming humidifier is the humidity and temperature of the inhaled gas inhaled by the patient. In the present invention, in addition to the thermistor, a dew sensor can be incorporated immediately before the patient to directly control the temperature and humidity of the inhaled gas, so that the humidity and temperature of the gas inhaled by the patient are always kept constant. You will be drowned. The situation described in the problem of the prior art, that is, FIGS.
6, when the situation described in FIGS. 17 and 18 occurs,
The following shows how the humidifier of the present invention can react and perform stable humidification.
Is shown as an example).

(1) FIGS. 4 and 5 show a case where the capacity of the water tank 1 and the main heater 2 is insufficient and the temperature of the suction gas at the outlet of the water tank 1 is 32 ° C., but the relative humidity is only 80%.
At this time, since the temperature of the inhalation gas at the mouth of the patient is set to be 32 ° C., the inhalation gas leaving the water tank 1 keeps the same temperature and humidity, and the temperature of the inhalation gas at the mouth of the patient is also 32 ° C.
It is 80%. Then, the condensation sensor 7 senses a decrease in humidity, and the controller 8 acts to increase the output of the main heater 2. When the output of the main heater 2 increases, the temperature and humidity of the steam generated from the water tank 1 increase. At this time, the temperature of the suction gas at the outlet of the water tank 1 becomes 36
C., the absolute humidity is 33.4 mg / L, and the relative humidity is 80%. This is because the temperature of the suction gas is higher than before,
With the output of the conventional hose heater 4, the inhalation gas temperature reaching the patient becomes higher than 32 ° C. Then
Thermistor 5 detects the high temperature and drops the output of hose heater 4, and the intake gas temperature returns to 32 ° C again. However, this time, since the suction gas contains 33.4 mg / L of water vapor, the relative humidity can be maintained at 100%.

(2) FIGS. 6 and 7 show cases where the temperature rises only to 28 ° C. even when the relative humidity of the suction gas at the outlet of the water tank 1 is 100%. In this state, since the temperature of the suction gas detected by the thermistor 5 is lower than 32 ° C., the output of the hose heater 4 via the controller 6 increases. Then, the temperature of the suction gas becomes 32 ° C., in which 27.2 m
g / L of water vapor, the relative humidity is 8
It drops to 1%. This is detected by the condensation sensor 7 and the output of the main heater 2 is increased via the controller 8. The temperature of the main heater 2 rises so that an absolute humidity of 33.4 mg / L can be supplied to reach an equilibrium. Therefore, also in this case, it is possible to maintain the intake gas at a temperature of 32 ° C. and a relative humidity of 100%.

(3) The middle of the intake coil 3 is cooled,
FIGS. 8 and 9 show the case where the temperature is lowered to 8 ° C. When the intake gas having a temperature of 32 ° C. and a relative humidity of 100% at the outlet of the water tank is cooled to 28 ° C. on the way, the saturated steam amount becomes 27.2.
mg / L, 6.2 mg corresponding to the difference
/ L is condensed. This suction gas is heated again by the hose heater 4 to reach 32 ° C., but the absolute humidity is 27.2 mg.
/ L, the relative humidity drops to 81%. This is detected by the condensation sensor 7 and the output of the main heater 2 is increased via the control device 8. This reaches an equilibrium when the temperature of the cooling section in the middle of the intake coil 3 rises to 32 ° C. and the absolute humidity recovers to 33.4 mg / L. At this time, if the temperature at the outlet of the water tank rises and reaches, for example, a temperature of 36 ° C. and a relative humidity of 100%, the absolute humidity is 41.5 m.
g / L, 33.4 m of saturated steam amount at a temperature of 32 ° C.
8.1 mg / L corresponding to the difference from g / L will be condensed in the cooling part of the intake coil 3. However, dew condensation is still light compared to a humidifier without the hose heater 4. Then, if the situation of sudden cooling of a part of the intake coil 3 is improved, the condensed water can be re-evaporated by heating the hose heater 4, and a large amount of condensed water is stored in the coil 3. Can be avoided.

(4) FIGS. 10 and 11 show a case where the thermistor 5 at the patient's mouth is externally heated. In this case, since the thermistor 5 is warmed from the outside, the temperature is sensed higher than the actual intake gas temperature. Then, the output of the hose heater 4 decreases, and the intake gas having a temperature of 32 ° C. and a relative humidity of 100% cannot maintain the temperature at the outlet of the water tank, and the temperature gradually decreases. Assuming that the temperature drops to 28 ° C., the saturated steam amount becomes 27.2 mg /
Since it is L, 6.2 mg / L corresponding to the difference is condensed in the circuit, and the absolute humidity is 27.2 mg / L. When this gas is heated to 32 ° C., the relative humidity drops to 81%. The humidity drop is detected by the dew sensor 7 and the output of the main heater 2 increases. This is because the relative humidity at the mouth of the patient becomes 100%, that is, the absolute humidity is 3%.
Equilibrium is reached at a point of 3.4 mg / L. At this time, assuming that the outlet temperature of the humidifier is 36 ° C., it contains 41.5 mg / L of steam. 32 at the patient's mouth
When the temperature decreases to 8.1 ° C., 8.1 mg / L corresponding to the difference in the amount of saturated steam condenses in the intake coil 3. However, condensation is still mild compared to humidifiers without hose heaters. If the situation of heating the thermistor 5 is improved, the condensed water can be re-evaporated by heating the hose heater, and the situation where a large amount of condensed water is stored in the flexible tube 3 can be avoided.

[0018]

Next, the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an example of the embodiment of the present invention. A water tank module 1 for heating and humidifying by introducing an inhalation gas supplied from an artificial respirator or the like (not shown) has a water tank. A main heater 2 for heating water to generate water vapor is provided, and the water vapor generated in the water tank module 1 is
It is supplied to the patient through the inspiratory coil 3. A hose heater 4 composed of a linear heating element is inserted and provided in an intake coil 3 connected to the water tank module 1. The hose heater 4 keeps the temperature of the suction gas in the suction coil 3 constant, thereby preventing the temperature of the suction gas from lowering and preventing the occurrence of dew condensation. 9 is a suction gas inlet.

The temperature of the inhaled gas is measured by a thermistor 5 provided at the mouth of the patient of the inspired flexible tube 3, and the output of the hose heater 4 is adjusted via a hose heater controller 6. The humidity of the inhaled gas is measured by a dew sensor 7 provided at the mouth of the patient of the inspiratory flexible tube 3, and the output of the main heater 2 is adjusted via a main heater controller 8. The dew condensation sensor 7 is a kind of humidity sensor whose resistance value changes in accordance with humidity. In particular, the resistance value changes rapidly at a high temperature of 90% to 95% or more in relative humidity, and the sensitivity in a high humidity region is high. Things are desirable. The dew condensation sensor 7 is used for detecting whether or not the inside of the intake pipe 3 is saturated with water vapor to form dew. Even if it occurs, it is desirable that the life is not affected, the mechanical strength is strong, and the circuit is simple and small without requiring an AC power supply.

The operation principle of the main heater controller 8 is shown in FIG.
Shown in The main heater 2 is a part for heating and evaporating water. Therefore, by controlling the output of the main heater 2 based on the humidity in the suction gas, a stable humidifying ability can be obtained. Specifically, the signal of the dew condensation sensor 7 at the mouth of the patient is input, and if the humidity is low, the output of the main heater 2 is increased. If the humidity is too high and a large amount of dew is generated, the main heater 2 is turned on. It is a negative feedback loop that lowers the output. Although the humidity of the inhalation gas supplied to the patient must be controlled most strictly, it is the most important point of the present invention to measure it directly and reflect it in the humidification amount. Conventionally, the control of humidity has been substituted by the measurement of temperature, which is an indirect index of humidity, and there has been a problem of being affected by the flow rate of intake gas and the environmental temperature of the outside world. But,
In the present invention, the problem is solved by performing negative feedback control by directly measuring the humidity.

The operating principle of the hose heater controller 6 is shown in FIG.
Shown in The hose heater 4 is for preventing the temperature of the suction gas heated and humidified in the water tank 1 of the humidifier from decreasing. Therefore, by controlling the output of the hose heater 4 based on the temperature of the suction gas, the temperature of the suction gas can be kept stable. Specifically, the signal of the thermistor 5 at the mouth of the patient is input, and if the temperature is low, the output of the hose heater 4 is increased, and if the temperature is high, the output is decreased. This keeps the temperature of the inhaled gas supplied to the patient constant.

[0022]

As described above, the humidifier of the present invention increases the stability of the supply humidity by using a dew sensor for controlling the humidity, which is the most important for the humidifier, so that the steady flow and Ventilation modes such as controlled breathing,
There is an effect that it is possible to obtain a humidifying humidifier having humidifying performance that is not affected by the amount of the intake gas flow rate and the change in the ambient temperature.

That is, the present invention can reliably saturate with water vapor in any situation, and its performance is not affected by the surrounding environmental temperature and the hot and cold air of the air conditioner. Even when used for patients who use humidifiers, reliable humidification can be achieved, and even when used near the limit of the humidifier body capacity, the risk of insufficient humidification can be reduced compared to conventional humidifiers. First, intermittent positive pressure respirators,
It can be incorporated into all medical devices that require humidification, such as an anesthesia machine and a flow meter for oxygen therapy, and can exhibit high humidification performance.

In addition, the present invention has a small amount of condensation and condensed water, so that bacteria do not propagate in the stored condensed water, the respiratory circuit can be kept clean, and respiratory tract infection and pneumonia can be caused in patients. Since there is little risk of injecting the stored water into the airway through the water, the water is not stored and the circuit is not blocked, so that the inspiratory resistance is small and the work of breathing is not increased.

In the present invention, there is no need to dispose of water accumulated in the circuit, so that nursing work can be reduced, and there is no water lost due to condensation, so that humidified distilled water is not wasted and economical. Since the amount of distilled water reduced is small, the frequency of replenishment is reduced, nursing work can be reduced, and the circuit is temporarily opened to replenish distilled water, but the frequency is reduced, so the probability of bacterial contamination from the outside world is reduced. The ventilation can be temporarily reduced when the circuit is opened, but the frequency can be reduced.

Further, the present invention can maintain high humidity, thereby preventing injury to the respiratory mucosal cells of a patient, preventing drying and fixation of sputum, facilitating the expectoration of sputum, and Since the inside of the airway can be cleaned, airway infection and pneumonia can be prevented, and since the airway is not narrowed due to sticking and accumulation of sputum, increases in respiratory resistance and work of breathing can be suppressed, and suffocation due to complete obstruction can be prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 2 is an explanatory diagram showing the operation principle of the main heater controller according to the present invention.

FIG. 3 is an explanatory diagram showing the operation principle of the hose heater controller according to the present invention.

FIG. 4 is an explanatory view showing the operation of the dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 5 is an explanatory view showing the operation of the dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 6 is an explanatory view showing the operation of the dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 7 is an explanatory view showing the operation of the dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 8 is an explanatory view showing the operation of the dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 9 is an explanatory view showing the operation of the dehumidification sensor-added warm humidifier according to the present invention.

FIG. 10 is an explanatory view showing the operation of the dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 11 is an explanatory view showing the operation of the dehumidifying sensor-added warm humidifier according to the present invention.

FIG. 12 is an explanatory view of a conventional heating humidifier.

FIG. 13 is an explanatory view of a conventional heating humidifier.

FIG. 14 is an explanatory view of a conventional heating humidifier.

FIG. 15 is an explanatory view showing the operation of a conventional humidifier.

FIG. 16 is an explanatory view showing the operation of a conventional heating humidifier.

FIG. 17 is an explanatory view showing the operation of a conventional humidifier.

FIG. 18 is an explanatory view showing the operation of a conventional heating humidifier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aquarium module 2 Main heater 3 Intake coil 4 Hose heater 5 Thermistor 6 Hose heater controller 7 Condensation sensor 8 Main heater controller

Claims (1)

(57) [Claims] 1. A main tank (2) for introducing a suction gas supplied from an artificial respirator or the like to heat and humidify a water tank module (1) for heating water in the water tank to generate steam. Water vapor generated in the aquarium module (1) can be supplied to a patient through an intake coil (3);
A hose heater (4) made of a linear heating element is inserted into and provided in an intake flexible pipe (3) connected to the water tank module (1). The temperature of the suction gas is kept constant to prevent the temperature of the suction gas from dropping and the occurrence of dew condensation. The output of the hose heater (4) is made adjustable via the heater (6), the humidity of the inhaled gas is measured by a dew condensation sensor (7) provided at the mouth of the patient of the inspiratory coil (3), and the main heater controller (8) is measured. ), Wherein the output of the main heater (2) can be freely adjusted via a dew sensor.