JPS6323665A - Temperature control method in incubator - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a temperature control method in an incubator, and is applicable to, for example, a temperature control method for an incubator used to protect and raise premature infants such as premature infants. This is particularly suitable.

[Conventional technology]

An incubator is a device that protects and nurtures infants such as premature infants, weak newborn infants, and sickly newborn infants by providing them with an optimal environment.

Such an incubator usually includes a nursery room for storing the baby's body isolated from the outside air, an air supply means for supplying air to the nursery room, and the air supplied by the air supply means. and heating means for controlling the temperature of the heating means.

There are two main methods used to control the temperature of the air supplied to the nursery room of this incubator: manual control, control, and servo control.

The manual control method measures the air temperature inside the nursery room (hereinafter referred to as the "inside temperature"), compares the measured inside temperature with a preset inside temperature, and adjusts the temperature based on the difference between these temperatures. This is a method of proportionally controlling the amount of power supplied to the heating means.

In contrast, the servo control method detects the baby's skin temperature by attaching a body temperature measurement probe to the abdominal wall of the baby housed in the nursery room, and is proportional to the difference between this detected value and the set skin temperature. In this method, the amount of electric power supplied to the heating means is controlled within the safe limit temperature within the nursery room.

[Problem that the invention seeks to solve]

In the manual control method, the internal temperature is set based on an empirically determined optimal environmental temperature, but this optimal environmental temperature varies depending on the birth weight, number of days elapsed after birth, and the like.

For example, in the case of a premature baby weighing 2,000 g, the temperature is said to be 33-34°C on the day of birth, and 32°C two weeks after birth. In addition, in the case of a premature baby weighing 1.200 g, the weight is set higher, and on the day of birth, the weight is set at 35 g.
℃, 33°C is considered good for two weeks after birth.

In this way, in the manual control method, the temperature inside the incubator must be set each time depending on the birth weight of the baby, the number of days elapsed after birth, and the environment surrounding the incubator. Settings for this purpose are extremely troublesome, and it is not a sufficient control method for maintaining a stable body temperature of the baby.

On the other hand, in the servo control method, the temperature inside the device is adjusted so as to keep the skin temperature of the baby within a narrow temperature range of, for example, 36 to 37°C. The skin temperature setting described above is based on reports that the oxygen consumption of the baby's body can be minimized, that is, the body temperature can be maintained without using excess energy. Since the servo control method adjusts the internal temperature so that the baby's body temperature reaches a set temperature, it is said to be effective in controlling the body temperature of premature infants, which tends to fluctuate. There is.

However, in the case of this servo control, the temperature setting probe must be attached directly to the abdominal wall of the premature baby.
There are problems and side effects such as:

That is, (a) if the body temperature detection probe falls off the skin, the detected temperature changes and the internal temperature fluctuates. (b) If the body temperature detection probe is covered with a blanket, diaper, or the baby's arm, that area will be warmed, and as a result, the amount of power supplied to the air heater will be reduced;
The internal temperature may drop, leading to a low temperature in the baby's body. (c) When the infant is placed in the prone position, the body temperature detection probe is heated between the mat and the abdominal wall, which may cause the internal temperature to drop and cause hypothermia. (iv) When the baby's body develops a fever, the temperature inside the chamber is automatically lowered based on the detected body temperature, leading to hypothermia in the baby, so there is a risk that the fact of fever may be overlooked. (e) When the body temperature detection probe gets wet with urine, disinfectant, etc., the body temperature detection probe is cooled and the internal temperature increases, which may lead to hyperthermia in the baby's body. Furthermore, if the temperature inside the baby's chamber suddenly rises due to the above-mentioned accident, the stress caused by this sudden change in temperature will aggravate the baby's apnea.

In particular, (g) Even if the baby's body temperature is kept constant, is it maintained constant by consuming less energy without using excess energy, or is it keeping it constant by consuming less energy without using excess energy, or is it producing excess energy to adapt to changes in the environment? It is not possible to determine whether the body uses energy to maintain a constant body temperature. For this reason, it has not been possible to properly control the environment to create an optimal environment that does not require the use of excess energy.

Even with a control method such as ``double control'', there was no problem if the risk to the baby being held was relatively small. However, in recent years, the level of medical technology has improved, and for example, 1,50
There have been cases where it has been necessary to save the lives of extremely premature babies weighing less than 0g. Therefore, incubators have come to be used to protect and nurture these extremely premature infants, and as a result, the method of controlling incubators is to minimize the heat loss of the infant's body as much as possible. There has been a need for a control method that can

The present invention has been made in view of the above-mentioned problems, and it solves the problems of the conventional manual control method and servo control method, and also minimizes the heat loss of the infant body housed in the nursery room. The purpose is to provide a control method that can

[Means for solving problems]

The present invention is based on the temperature inside the nursery room (temperature inside the container) TA and the temperature T of either the wall temperature of the nursery room or the outside temperature of the nursery room.
Detect the operating temperature TE, TE = 0.6
Calculated from the formula TC-1-0,4TA, and controls the temperature of the air supplied into the nursery room so that when this working temperature TC deviates from the preset temperature range, this working temperature T1 is returned to the original temperature. This is how I did it.

[Effect]

For example, as shown in FIG. 1, the heating means 23 for heating the air supplied into the nursery room is controlled by considering the internal temperature TA and the wall temperature or outside air temperature TE to control the retention and thermal radiation. Since this is done by calculating the effective temperature TC, which is a thermal scale that indicates the overall effect, it is possible to control the nursery room to an optimal environment that reduces heat loss to the infants housed there. .

〔Example〕

First, the structure of an incubator used in an embodiment of the present invention will be schematically explained with reference to FIGS. 3 to 5.

As shown in FIG. 3, the nursery room 2 formed at the top of the incubator 1 is designed to protect and raise physically immature infants 4, such as premature infants, in a suitable environment isolated from the outside world. A bed 5 on which the infant 4 is placed is surrounded by a hood 6 made of transparent acrylic resin.

On the other hand, an air supply path 3 formed on the lower side of the nursery room 2 is provided to supply air suitable for the protection and growth of infant bodies 4 such as premature babies housed in the nursery room 2. In Part 3, the air merging chamber 34, heating chamber 35, humidity adjustment section 36, and mixing chamber 37 are arranged in order from the upstream section 27 shown on the right side to the downstream section 28 shown on the left side. It is provided.

The air confluence chamber 34 has an air outlet 2 formed near one end of a partition plate 38 that partitions the nursery room 2 and the air supply path 3.
It communicates with nursery room 2 through 5.

Further, a mixing chamber 37 provided at the downstream end of the air supply path 3
communicates with the nursery room 2 through an air inlet 24 formed near the other end of the partition plate 23.

A circulation fan 39 is disposed in the air merging chamber 34, and this circulation fan 39 sucks the air in the nursery room 2 from the air outlet I] 25, and also draws air from the nursery room 2 into the merging chamber 34.
It has the function of sucking fresh air from the outside through a through hole 35 (not shown) provided in the inner wall surface of the heating chamber, merging the air, and sending it into the heating chamber 35 provided on the downstream side.

An electric heater 23 is disposed in the heating chamber 35, and the air sent from the air merging chamber 34 side is passed through the electric heater 2.
3, and is heated as necessary by L
It is sent to the humidity adjusting section 36.

This humidity adjustment section 32 includes a dry passage 60 for directly passing the air flowing from the two-liquid side to the mixing chamber 37 without humidifying the air, and an opening 65 provided in this dry passage 60 to pass the air through the air. A wet passage (not shown) is used to guide the air flow to a humidification passage 67 disposed below the dry passage 60, and to pass the humidified air through the humidification passage 67 to the mixing chamber 37 from an opening (not shown). are provided for each.

The air that has flowed into the mixing chamber 37 through the dry passage 60 and the wet passage 61 is sufficiently mixed in the mixing chamber 37 to have a predetermined uniform humidity, and then flows from the air inlet 24 into the mixing chamber 37. It is supplied into the chamber 2.

The incubator 1 supplies air whose temperature and humidity are controlled into the nursery room 2 as described above.

Therefore, in order to control the supplied air to the optimum temperature and humidity for the protection and growth of the infant body 4 housed in the nursery room 2, it is necessary to adjust the temperature and humidity inside the nursery room 2 or the wall temperature of the hood 6. need to be detected accurately.

For this purpose, in this example, an incubator temperature and humidity measuring device shown in FIGS. 4 and 5 is used. This device includes a wall temperature sensor 42 for measuring the wall temperature of the hood 6, an air temperature sensor 41 for measuring the temperature inside the nursery room 2, and a humidity sensor 45 for measuring the humidity inside the nursery room 2. are integrally attached to a casing 46 formed into an elongated box shape as shown in FIG.
It is configured as 0. Each sensor 42.41.4
Reference numeral 5 is composed of a conventionally known thermistor.

As shown in FIG. 4, a protruding fitting portion 48 is formed on the front surface 46a of the casing 46, and the humidity sensor 4
5 and the temperature sensor 41 are attached to this fitting part 48. An engagement groove 52 having a T-shaped cross section is provided on the fitting portion 48.
is formed so that a water jar 53 can be attached here.

This water bottle 53 is used to store water 55 for moistening a towel holder 54 as shown in FIG. 5, which is hung over the humidity sensor 45.
It is suspended so that it can swing freely. This support arm 56
An engagement flange 57 having a T-shaped cross section is formed on the holder, and by inserting the engagement flange 57 into the engagement groove 52 formed on the engagement part 48 of the sensor unit 40, the water bottle can be closed. 53 can be swingably attached to the fitting part 48. Since the water bottle 53 is swingably attached to the fitting part 48 of the sensor unit 40 in this way, the hood 6 is moved upward about the hinge 29 as shown by the dotted chain line in FIG. Even when the water bottle 53 is opened by rotating it, the water bottle 53 can always be suspended along the vertical line. Therefore, when the hood 6 is opened like this,
Or, when the water bottle 53 is closed from the open state, the water 55 contained in the water bottle 53 will not spill out.

As shown in FIG. 4, the wall temperature sensor 52 is attached to the rear end of the front surface 46a where the fitting portion 48 of the sensor unit 40 is formed so as to protrude substantially perpendicularly to the front surface 46a. This is because the rear wall 6b of the hood 6 into which the wall temperature sensor 42 is inserted is formed approximately at right angles to the side wall 6a to which the casing 46 is attached.

One connection cord 49 is led out from the main body casing 46, and is connected to the air temperature sensor 41, the wall temperature sensor 42, and the humidity sensor 45 attached to the main body casing 46. Signal transmission lines 4.1a, 42a, 45a are grouped together within this connection cord 49, as shown in FIG.

As shown in FIG. 4, the side wall 6a of the hood 6 to which the sensor unit 40 configured as described above is attached has an opening 43 into which a fitting portion 48 provided in the casing 46 of the sensor unit 40 is fitted. and a wall temperature measurement hole 44 into which a wall temperature sensor 42 is inserted. This wall temperature measurement hole 44 is formed at the lower right side of the rear wall 6b of the hood 6, and the wall temperature sensor 42 can be inserted straight into the hole along the wall surface of the rear wall 6b. It is formed like this. On the other hand, the opening 43 is formed in the side wall 6a that is perpendicular to the rear wall 6b in which the wall temperature measurement hole 44 of the hood 6 is formed, and is formed in a fitting portion protruding from the front surface 46a of the casing 46 of the sensor unit 40. It is sized and shaped to allow the portion 48 to fit snugly therethrough. 4 and 5, the fitting part 4
8 and the opening 43 are each formed into an oval shape. This opening 43 allows the wall temperature sensor 42 attached to the casing 46 of the sensor unit 40 to be inserted into the wall formed on the rear wall 6b of the hood 6 when the fitting part 48 of the sensor unit 40 is fitted into this opening 43. It is formed at a position where it can just enter the temperature measurement hole 44.

As shown in FIG. 4, a pair of port insertion holes 50 are formed in the casing 46 of the sensor unit 40, and a side wall 6 of the hood 6 to which the casing 46 is attached.
Female threaded portions 51 are formed at positions corresponding to these bolt insertion holes 50, respectively. Thereby, the casing 46 can be easily fixed to the side wall 6a using the bolts 47.

FIG. 3 shows a state in which a skin temperature sensor 58 for measuring the skin temperature of a baby 4 housed in the nursery room 2 is attached. This skin temperature sensor 58 is connected to the hood 6.
The child is introduced into the nursery room 2 through a small circular opening 63 formed approximately in the middle of two walls. The connection cord 58a connected to the skin temperature sensor 58 can be connected to the casing 46 of the sensor unit 40 by a connector 59 attached to its end, as shown in FIGS. 4 and 5. It looks like this. The signal from the skin temperature sensor 58 is sent to the control section of the incubator main body via a sensor unit 140 and a single cord 49.

As explained above, in this embodiment, the air temperature sensor 41, the wall temperature sensor 42, and the humidity sensor 45 are mounted on the casing 4.
6 to form a single sensor unit 40. Therefore, these plurality of sensors can be easily attached to and detached from the hood 6 at the same time.

In this embodiment, since the connector 59 of the skin temperature sensor 58 can be connected to the casing 46 of the sensor unit 40, the connection cord 58a of the skin temperature sensor 58 can be connected to the incubator body. Although it was possible to eliminate the need for wiring to the control section, it is not necessarily necessary to connect the connector 59 to the sensor unit 40.

Next, a method of controlling the temperature of the above-mentioned incubator I will be explained.

FIG. 1 shows a method according to a first embodiment of the present invention, in which an internal temperature detection section 10 for measuring the air temperature in the nursery room 2, a wall temperature detection section 11 for detecting the wall temperature of the nursery room, are housed. A body temperature detection section 12 for measuring the skin temperature of the baby's body 4 is provided.

As shown in FIGS. 3 and 4, the internal temperature detection section 10
It is constructed by disposing a temperature sensor 41 inside the hood 6.

On the other hand, the wall temperature detection section 11 is constructed by inserting a wall temperature sensor 42 into a wall temperature measurement hole 44 in the rear wall 6b of the hood 6, as shown in FIG. Furthermore, as shown in FIG.
The skin temperature, ie, body temperature TC, of the subject is measured.

On the other hand, the body temperature T3 to be controlled by the body temperature setting section 13
(for example, 36 to 37°C). Then, the comparison unit 14 compares the set body temperature T3 and the detected value TI by the body temperature detection unit 12. Then, an output corresponding to the difference between them is applied to the programmable temperature controller 15. Further, the internal temperature upper limit setting section 16 sets the internal temperature upper limit TC to, for example, 38°C. The internal temperature upper limit temperature T1 set by the internal temperature upper limit setting section 16 and the value of the actual internal temperature TC detected by the internal temperature detection section 10 are respectively added to the comparison section 17. Then, the output of the difference between the actual internal temperature TA and the internal internal temperature upper limit temperature T1 set by the internal internal temperature upper limit setting section 16 is applied to the programmable temperature adjusting section 15.

Further, the wall temperature TCl of the hood 6 detected by the wall temperature detection section 11 and the above-mentioned hot water temperature TA in the vessel are respectively added to the working temperature calculation section 18, and in this working temperature calculation section 18, the formula TE -0
, 6Tw→-0,4TA, the operating temperature TC is calculated. The working temperature TE obtained in this way and the working temperature lower limit temperature T2 set by the working temperature lower limit setting section 20
(for example, 30° C.) are added to the comparison section 21, respectively.

The comparison section 21 compares the actual operating temperature TC and the lower limit temperature T2 of the operating temperature, and outputs the difference to the programmable temperature adjustment section 15.

The programmable temperature control section 15 controls the air heating means control section 22 to control the air heating means 23, which is an electric heater or the like, according to a pre-stored program.

This program control of the air heating means 23 is performed as follows. That is, T A < T I --------
---(11T E > T 2-----------
(Under the conditions of 21, T m = T 3 or TIICT3 ~------
The air heating means 23 is controlled so that [3] is achieved. However, in formula (3), r T B C: T 3
J means that when the set temperature T3 is given within a range, TE is within that range.

That is, in this embodiment, the body temperature T8 of the baby's body 4 is constantly detected by the body temperature detection unit 12, and the difference from the preset body temperature T3 is input to the programmable temperature adjustment unit 15. When the body temperature TC being detected is lower than the preset body temperature T3, the programmable temperature control unit 15 operates the air heating means 23 to heat the air supplied into the nursery room 2 to maintain the internal temperature TA. functions to raise the When the internal temperature TC rises in this way, the body temperature TIl of the baby's body 4 rises and approaches the preset temperature T3. Then, the body temperature TC during detection is expressed by the formula (3
), the operation of the air heating means 23 is stopped.

In the case of item 2, the air heating means 23 operates until the body temperature TI being detected and the set body temperature TE substantially match, so the internal temperature TA increases, but if the temperature inside the nursery room 2 is made too high, This actually has a negative effect on the baby's body 4. Therefore, when the internal temperature TA that is being detected exceeds the preset value TC, the programmable temperature controller 15 adjusts the temperature T of the baby's body 4.
Regardless of C, the operation of the air heating means 23 is stopped. Therefore, the internal temperature TA will not rise to the dangerous range.

On the other hand, when the detected body temperature KTa of the baby's body 4 becomes higher than the set body temperature T3, the programmable temperature control section 15 stops heating the air by the air heating means 23 to raise the internal temperature T.
A, thereby acting to lower the body temperature TC of the baby's body 4.

However, in this case too, lowering the chamber temperature TA too much will have a negative effect on the baby's body 4. Therefore,
It is necessary to set a lower limit so that the internal temperature TA does not fall below the temperature. Conventionally, this lower limit was directly set by the lower limit of the internal temperature TC, but in this embodiment, this lower limit is set by the operating temperature TE.

As is well known, the thermal environment of the infant body 4 housed in the nursery room 2 consists of direct heat exchange with the air in the nursery room 2 and heat generated through the transparent hood 6 surrounding the nursery room 2. It is most affected by radiation. In particular, the latter has conventionally been ignored due to the inconvenience of measuring wall temperature, etc., but it may actually be a bigger factor than the former.

Specifically, even if the internal temperature TA is high, if the temperature outside the incubator 1 (usually the room temperature of the room housing the incubator 1) is low, the baby 4 is placed in the nursery room. 2 hood 6
A considerable amount of heat is removed through thermal radiation. On the other hand, even if the internal temperature TA is low, if the outside temperature is high, or there is direct sunlight or heat radiation from a heater, the baby's body 4 in the nursery room 2 will be in a fairly high temperature thermal environment. You will be exposed.

It takes a considerable amount of time for such changes in the thermal environment outside the incubator to be reflected in the temperature T^ inside the nursery room 2. For this reason,
When measuring only the internal temperature TC, it is difficult to respond to changes in the actual thermal environment of the baby's body 4.

Therefore, in this embodiment, the sensor unit 40 shown in FIGS. 4 and 5 is used to simultaneously measure the internal temperature TA.
The wall temperature T1 of the hood 6, which reacts relatively sensitively to the thermal environment outside the incubator, is also detected, and 2TE-〇, 6TEn +0.
4 The thermal environment of the baby's body 4 is controlled using the operating temperature TC determined by TE.

Specifically, in FIG. 1, when the body temperature TIl of the baby's body 4 rises and the heating of the air heating means 23 is stopped, and the internal water temperature TA decreases, the operating temperature TC reaches the set value T2. When the temperature TI of the baby's body 4 becomes lower than that, the programmable temperature control section 15 operates the air heating means 23 again via the air heating means control section 22 regardless of the temperature TI of the baby's body 4, thereby raising the temperature TA in the chamber again. so that the operating temperature T4 does not fall below the set value T2.

FIG. 2 shows an example of the operating temperature TE. This figure 2 is T
It shows the relationship between the internal temperature TA ('C) and the wall temperature T u ('C) of the hood 6 at E-30°C.

When controlling the internal temperature TA of the nursery room 2, the operating temperature TE is prevented from falling below the straight line of TE=30°C. That is, FIG. 1 shows an example in which the set value T2 in the lower limit operating temperature setting section 20 is set to 30°C.

This figure 2 also shows that the temperature outside the incubator, that is, the room temperature TC of the room housing the incubator, is 30°0°C and 25.0°C, respectively.
, the internal temperature TA and the wall −m'rt, +
It also shows the relationship between The numerical values on each graph indicate actual measured values of the wall temperature TE.

As can be seen from these graphs, even if the internal temperature TA is maintained at 32°C, for example, the room temperature Ti may be 25.0°C or 20°C.
．． When the temperature drops to 0℃, the wall temperature TW decreases to 28.0℃ or 25.1℃.
As a result, the operating temperature T1 becomes lower than the line of TE=30°C. Therefore, in these cases, it is necessary to operate the air heating means 23 to raise the internal temperature TA.

Conventionally, the lower limit of the internal hot water temperature TA was directly set, and the internal temperature T
A was kept from falling below this lower limit. However, as can be seen from Figure 2, for example, if the lower limit of the internal temperature TA is set to 30°C, if the room temperature TCl is lower than 30°C, even if the internal temperature TA is 30°C, the actual A large amount of heat is removed from the baby's body 4 by thermal radiation through the hood 6 of the nursery room 2. This is an extremely dangerous condition that can lead to death for premature infants, who have a very narrow range of temperature control in which they can regulate their own body temperature to maintain a constant temperature.

For this reason, in the conventional method, the lower limit of the internal temperature TA must be set quite high. However, this means that if the wall temperature TCI is high, the internal temperature TA cannot be lowered as much as necessary.

In contrast, in the method of this embodiment, the lower limit is set using the working temperature TE, which is a function of the wall temperature TE and the chamber temperature TA, so when the wall temperature TW is low, the chamber temperature TA is high. By the way, the control works, and on the other hand, when the wall temperatures Tl and I are high, the internal temperature TA can be sufficiently lowered as required.

When the operating temperature T is used as in this example, there are also the following advantages.

In other words, even premature infants are warm-blooded animals, so in cold environments they actively produce heat to maintain their body temperature, and in hot environments they dilate blood vessels in their skin and sweat to dissipate heat to maintain a constant body temperature. I'm trying to keep it.

The following two states can be considered when the state in which the baby's body temperature is kept constant as described above can be broadly classified.

First of all, one of them is a state where body temperature is kept constant with minimum energy consumption without using excess energy, and the other is a state where excess energy is used for heat production and heat dissipation. It is used to maintain a constant body temperature.

Of course, it is desirable to control the thermal environment so that the body temperature can be kept constant without using excess energy.

However, by simply detecting the body temperature Tg of the baby, it is not possible to determine in what state the baby's body temperature is kept constant. Therefore, with the conventional method of simply measuring body temperature TC, it has not been possible to properly control the environment to maintain the body temperature constant without using excess energy. That is, in the conventional method, the air heating means 23 is controlled only after the body temperature exceeds the temperature controllable range and the body temperature TC cannot be kept constant even if the baby's body uses excess energy. and as long as the baby's body temperature TIl remained constant, no control was performed.

However, as explained in connection with Figure 2, the wall temperature 'rw
If the operating temperature TE decreases as a result, the heat loss in the baby's body will increase even if the internal temperature TA is kept constant. According to a clinical report that investigated how changes in wall A'r and I affect the baby's body, oxygen consumption when the difference between wall temperature TC1 and body temperature TIl is 1.3°C. is 5.7
1111/kg/min, while the wall temperature T
When the difference between E and body temperature T8 is 5.4°C, even if the internal temperature TA is kept constant, the difference is 8.3 ml/kg/m
It is reported that the increase in in.

In the case of this embodiment, when the working temperature TC becomes lower than the lower limit temperature T2 set by the working temperature lower limit setting section 20, the programmable temperature adjusting section 15 detects this and operates the air heating means 23, so that the air heating means 23 is always operated. This air heating means 23 is heated so that the operating temperature TE becomes equal to or higher than the preset lower limit temperature T2.
Control ■. Therefore, due to the decrease in the operating temperature TE, the air heating means 23
can be controlled. Therefore, by lowering the effective temperature TE due to the influence of the room mTR, it is possible to prevent the baby's body from using excess energy to keep the body temperature TE constant, and the nursery room is always kept at its optimum temperature. The environment can be controlled.

In this example, since the airflow inside the nursery room is weak, when calculating the operating temperature TC, TE = 0.6
The formula of Tu + 0.4TA was used. However, considering the airflow in the nursery room, TE -0.6TC +0.4 (
, j"j TA (N 1 ) TB ) (It is also possible to use the D expression 'fi:').

In addition, in this embodiment, an example was shown in which the operating temperature TE was controlled using the air heating means 23, but in order to heat the wall temperature, for example, a wall constructed by embedding a heater in the hood may be used. A heating means may also be used for distribution.

Next, a second embodiment of the present invention will be described in detail using FIG.

In the case of this example as well, the substantial structure, purpose, and effects are
This is the same as the embodiment, and the same parts are denoted by the same reference numerals and the description thereof will be omitted.

In the case of the first embodiment, the control by the operating temperature TC is as follows:
The working temperature TC is the lower limit temperature T2 of the preset working temperature.
An example is shown in which control is performed only when the temperature drops below the temperature T8, and control during normal operation is performed by measuring the baby's body temperature T8.

In the case of this second embodiment, an operating temperature setting section 30 is provided, and a wall surface heating means 32 for heating the wall surface of the nursery room is provided.
This shows a method in which the wall surface heating means 320 is provided with the control section 31 to control the operating temperature T0 to be kept at a constant value. The program control of the programmable temperature control unit 15 of this second embodiment is as follows: T A < T I
4) T I = T 4 or TCCTC・---～---
-+5), the air heating means 23 and the wall surface heating means 32 are controlled respectively. In addition, r
The meaning of TE CT 4J is the same as in the case of equation (3) described above.

That is, when the operating temperature TE being detected fluctuates with respect to the preset operating temperature T4, the programmable temperature adjustment section 15 adjusts Tyu-Ta (including the case of T*CTa; the same applies hereinafter). The air heating means 23, the wall surface heating means 32, or these heating means 23.32
control both. Therefore, the protection and cultivation environment in the nursery room can always be controlled to be an optimal environment with the least heat loss.

In the case of this embodiment, since the heating means 23 and 32 are controlled so that the operating temperature TC is constant, there is no need to measure the body temperature Tll of the baby. Therefore, there is an advantage that the above-mentioned accidents that occur during body temperature measurement can be completely eliminated.

In this embodiment, the wall heating means 32 and the wall heating means control section 31 do not necessarily need to be used. Furthermore, in most cases, when the internal temperature TA rises beyond the allowable upper limit value, the wall temperature T- will also inevitably rise, so the internal temperature upper limit setting section 16 etc. may not be used.

In the first and second embodiments described above, the operating temperature TE
Although an example is shown in which the wall temperature T1 of the hood is used as a parameter, room temperature Tll may be used instead of the wall temperature TE. However, detecting the temperature inside the hood wall as in the above embodiment has the following advantages. That is, when directly detecting the temperature of the outer surface of the hood wall or the room temperature T1, care must be taken to avoid erroneous detection due to direct radiation from a heating appliance or the like. However, if the temperature inside the hood wall is detected, the correct wall temperature T1 can always be detected.

Furthermore, in each of the embodiments described above, the thermal environment of the nursery room 2 is controlled only by heating means such as the air heating means 23 and the wall surface heating means 32, but it is also possible to control the thermal environment of the nursery room 2 by using an appropriate cooling means in combination. good.

〔Effect of the invention〕

As described in detail above, the present invention measures the internal temperature TA, the temperature Tc of either the wall iT of the nursery room, or the outside temperature Tll around the nursery room, and calculates the temperature based on these measured values. The working temperature TE = 0.6 Tc + 0.4 TA was calculated, and the working temperature in the nursery room was controlled so that this working temperature TE fell within the preset temperature range, so the conventional manual control method was not possible. It is possible to control the protective and nurturing environment in the nursery room so that the various problems of the servo control method and the servo control method can be solved, and the heat loss of the infant body housed in the nursery room can be minimized. can. Therefore, it is possible to suitably control the temperature of not only incubators accommodating extremely premature infants that require particularly low heat loss, but also incubators accommodating general premature infants.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the control method of the first embodiment of the present invention, Fig. 2 is a graph showing the relationship between the internal temperature, wall temperature, and operating temperature, and Fig. 3 is a diagram showing the control method of the first embodiment of the present invention. 4 is an exploded perspective view of the temperature measuring device of the incubator, FIG. 5 is a side view showing the installation state of the same, and FIG. 6 is the second embodiment of the present invention. FIG. 3 is a process diagram showing the control method of the embodiment. In addition, in the symbols used in the drawings, 2-・-・−−−−−=−Nursery room 3・−−1−−・−−−11−−−−Air supply path 6−
----------Hood 23--Electric heater (air heating means) 40--Sensor unit 41--
−・−−−−−−One temperature sensor 42−・−・−・−Wall temperature sensor T A−−−−−−・−・−・−Inner temperature Tm−−−・
−1−−−−−−−One body temperature T E−−'−−−−'−'
-'--Operating temperature TC-------1-----Room temperature. sensor unit

Claims (1)

[Claims] 1. A nursery room for accommodating a baby, an air supply means for supplying air to the nursery room, and a system for controlling the temperature of the air supplied by the air supply means. In the method for controlling the temperature of an incubator, the temperature T_A in the nursery room and the temperature T_C of one of the wall temperature of the nursery room and the outside temperature around the nursery room are each measured. Then, using these measured values, the working temperature T_E=0.6T_C
+0.4T_A, and when the working temperature T_E deviates from a preset temperature range, the temperature of the air supplied into the nursery room is controlled to keep the working temperature T_E within the temperature range. How to characterize it. 2. The body temperature T_B of the baby housed in the nursery room is measured, and the temperature control means is controlled according to the change in the body temperature T_B of the baby body, and at this time, the temperature in the nursery room is The method according to claim 1, characterized in that T_A does not exceed a first set value T_1 and at the same time the operating temperature T_E does not fall below a second set value T_2. . 3. The skin temperature of the baby's body is measured as the baby's body temperature T_B, and the temperature T_W inside the wall of the nursery room is measured as the parameter T_C of the working temperature T_E. The method described in.