JPH08278252A - Automatic chemical analyzer - Google Patents

Abstract

PURPOSE: To obtain an automatic chemical analyzer in which costs related to a lamp are reduced, labor related to the replacement of the lamp is reduced and which reduces the stop time for the replacement of the lamp by a method wherein the life of the lamp is made longer and the frequency of its replacement is reduced. CONSTITUTION: A DC power supply 20 which supplies output power to a halogen lamp 13 is installed. An automatic chemical analyzer is provided with a setting circuit C by which the output power supplied to the halogen lamp 13 from the DC power supply 20 is set nearly at the rated output value of the halogen lamp 13 in the measurement of the automatic chemical analyzer, by which the output power is set at a value by about 10% lower than the rated output value on the standby of the measurement and which is constituted of a resistance R1, a resistance R2 and a relay circuit Ry and with a control circuit 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic chemical analyzer for reacting a liquid sample such as serum with a reagent to automatically measure the absorbance and calculating and displaying the concentration based on the absorbance.

[0002]

2. Description of the Related Art An automatic chemical analyzer measures the absorbance based on the reaction between a liquid sample such as serum and a reagent,
The concentration and the like of the liquid sample are calculated and displayed. Therefore, it is essential for the spectrophotometer, which is a system for measuring (photometry) the absorbance, to stably measure the change in the absorbance per unit time in order to improve the reliability of the entire analyzer. For this reason, in the spectrophotometer, a halogen lamp, which can obtain high output stability especially in the ultraviolet region, is used as a light source. This halogen lamp is housed in a lamp house because it needs to be stabilized in temperature.

By the way, while the halogen lamp can obtain high output stability as described above, (1) the continuous lighting time is about 2000H, that is, the life of the lamp is 2 hours.
000H, (2) the lamp itself and its surroundings are at a high temperature (200 ° C-3
However, there are problems such as that the temperature becomes 00 ° C., and (3) it takes some time until a stable output is obtained. Further, conventionally, as for the lamp power supply in the analyzer, ON / OFF of the control device, etc., as shown in FIG. 13, all the switches 51 of the power unit 50 of the entire analyzer are turned ON.
Since the lamp has been used for a long time, the replacement of the lamp which has reached the end of its life is performed after turning off the switch 51, shutting off the power supply of the whole analyzer (power supply of the lamp), and waiting until the temperature of the lamp decreases. .

On the other hand, the conventional usage pattern of the automatic chemical analyzer was generally 8 hours a day, daytime, but recently, the test results are reported to the clinical side promptly and urgently. Since the clinical side is requesting prompt response to patients, it is necessary to keep the analyzer ready for analysis 24 hours a day so that quick analysis and its analysis results can be reported promptly. It has been desired to realize various devices.

[0005]

[Problems to be Solved by the Invention]
It is necessary to keep the halogen lamp constantly lit (continuously lit) in order to stand by so that analysis can be performed quickly at any time 24 hours a day. In other words, once the halogen lamp is turned off, it takes a long time to turn it on again (see the problem of (3) described above), and it is not possible to quickly respond to the analysis request.

However, according to the above-mentioned problem (1), since the life of the halogen lamp is about 2000H, if the lighting time of the halogen lamp is changed from the conventional 8 hours a day to 24 hours a day, Of course, the life is three times faster than before, and the lamp replacement frequency is about three times. Therefore, new problems such as an increase in the cost of the lamp, an increase in the labor for replacing the lamp, and an increase in the down time of the analyzer for the lamp replacement have occurred.

Conventionally, the lamp replacement has been performed by shutting off the power supply of the entire analyzer, but in the analyzer, there is a constant temperature section for keeping the temperature of the sample (specimen) at about the body temperature of the patient. The rise time of the constant temperature part was longer than the rise time of other circuit systems in the analyzer and the lamp itself. That is, there is an inconvenience that the analyzer stop time for lamp replacement is longer than the lamp start-up time, and it is not possible to deal with an urgent patient during that time.

Further, when the lamp is actually replaced, the lamp itself is conventionally at a high temperature due to the problem (2), so that the lamp and the lamp house are kept on standby until the temperature is lowered. However, the lamp changer
It was not sure whether the temperature of the lamp or the lamp house had dropped. Therefore, the lamp changer
In order to prevent burns and the like due to contact with the lamp and the lamp house, it was necessary to stand by for a long time to some extent, and the waiting time was also indefinite, resulting in poor efficiency.

The present invention has been made in view of the above-mentioned circumstances. A first object of the present invention is to reduce the cost of the lamp by prolonging the life of the lamp and reducing the replacement frequency thereof. In addition, it is possible to quickly analyze an analyzer 24 hours a day, while reducing the time and labor required for lamp replacement and reducing the lamp replacement down time.

A second object of the present invention is to shorten the startup time of the entire apparatus for lamp replacement by performing lamp replacement without stopping the driving of the analyzer.

Further, a third object of the present invention is to allow a lamp exchanger to surely recognize the temperatures of the lamp and the lamp house in which the lamp can be exchanged, so that the lamp can be exchanged efficiently and more safely. .

[0012]

In order to achieve the above object, the automatic chemical analyzer according to claim 1 analyzes the light emitted from the light source that is continuously turned on and transmitted through the mixed liquid of the sample and the reagent. As a result, in the automatic chemical analysis device for calculating and displaying the data such as the concentration value of the sample, the power supply means for supplying the output power to the light source and the power supply means for supplying the power to the light source. The output power is set to a substantially rated output value of the light source during measurement of the analyzer, and is set to a value lower than the rated output value by a predetermined amount during a measurement standby.

Particularly, in the automatic chemical analyzer according to the second aspect, the light source is a halogen lamp.

Particularly, in the automatic chemical analyzer according to the third aspect, the predetermined amount is approximately 10% of the rated output value.

Further, in particular, the automatic chemical analyzer according to claim 4 is provided with an integrating means for integrating the life converted lighting time of the light source, and the integrating means uses the actual lighting time at the time of the measurement, At the time of waiting for the measurement, a value obtained by dividing the actual lighting time by the life reduction coefficient is used.

Further, in the automatic chemical analyzer according to claim 5, the life reduction coefficient is 4.

Further, in order to achieve the above object, in the automatic chemical analyzer according to claim 6, the light emitted from the light source which is continuously turned on and analyzed through the light transmitted through the mixed liquid of the sample and the reagent, In an automatic chemical analyzer for calculating and displaying data such as a concentration value of a sample, power supply means for supplying output power to the light source and ON / OF of output power supplied to the light source
And a dedicated switching circuit capable of F.

Further, in order to achieve the above object, claim 7
In the automatic chemical analyzer described in 1, the data such as the concentration value of the sample is calculated and displayed by analyzing the light emitted from the light source that is continuously turned on and transmitted through the mixed liquid of the sample and the reagent. In the automatic chemical analyzer described above, a case for accommodating the light source is provided, and temperature display means for displaying the temperature of the case and its surroundings is provided at a desired position of the case.

Particularly, in the automatic chemical analyzer according to the eighth aspect, the display of the temperature display means is changed at a set temperature as a boundary.

[0020]

In the automatic chemical analyzer according to any one of claims 1 to 5,
During the measurement of the analyzer, the output power supplied from the power supply means to the halogen lamp, which is the light source, is set to the substantially rated output value of the light source by the setting means, and when the measurement is on standby, a predetermined amount (for example, the rated output) is output from the rated output value. Value approximately 10
%) Since it is set to a low value, the life of the light source in the standby state for measurement is extended by about 4 times compared to the conventional case (when used at the rated output value).

In particular, in the automatic chemical analyzer according to the fourth and fifth aspects, the cumulative conversion means integrates the life conversion lighting time of the halogen lamp. This integration means uses the actual lighting time at the time of measurement. By using a value obtained by dividing the actual lighting time by the life reduction coefficient (using “4”, which is the above life extension) during the measurement standby, the life conversion lighting time of the halogen lamp can be monitored. The life of halogen lamps can be easily controlled.

On the other hand, according to the automatic chemical analyzer of the sixth aspect, the output power is supplied to the light source by the power supply means, and only the output power supplied to the light source can be turned on / off by the dedicated switching circuit. Has become.
In other words, since the power supply to the light source can be turned on / off without turning on / off the power of the entire analyzer, it is not necessary to turn off the power of the entire analyzer when replacing the light source.

Further, according to the automatic chemical analyzer of the present invention, the case for accommodating the light source is provided, and the temperature display means for displaying the temperature of the case and its surroundings at a desired position of the case. It is provided. This temperature display means is, for example, a preset temperature (set temperature)
Since the display changes at the boundary, if the temperature is set to a temperature at which the light source can be contacted, it is possible to know at a glance when the light source is replaced whether or not the light source can be contacted.

[0024]

Embodiments of the automatic chemical analyzer according to the present invention will be described below with reference to the accompanying drawings.

(First Embodiment) FIG. 1 is a schematic perspective view of an automatic chemical analyzer according to the first embodiment of the present invention. According to FIG. 1, the automatic chemical analyzer comprises a sample disk (sample part) 1 holding a sample 1a, a reagent part 2 holding a reagent, a reaction part 3 having a plurality of reaction tubes 3a, and an entire device. And the arithmetic and control unit 4 for processing.
An operation unit 5 such as a keyboard capable of inputting information such as test items is input to the arithmetic and control unit 4, the arithmetic and control unit 4
The display unit 6 such as a monitor for displaying the data processed by the above and the printer 7 are respectively connected.

The sample unit 1 includes a plurality of sample containers 1b containing test objects (samples 1a) such as human serum.
And a sample suction / dispensing mechanism 1c for sucking and dispensing the sample 1a. The sample dispensing mechanism 1c selects a desired sample 1a under the control of the arithmetic and control unit 4, sucks a predetermined amount of the sample from the sample nozzle 1d, and then a sensor is mounted on a predetermined reaction tube 3a of the reaction unit 3. It is configured to dispense via the section 8.

Further, the reagent section 2 includes a plurality of reagent containers 2a in which reagents corresponding to the items of the analytical test are stored by type.
It has a reagent aspirating and dispensing mechanism 2b for aspirating and dispensing a reagent. The reagent dispensing mechanism 2b selects a predetermined reagent container 2a under the control of the arithmetic and control unit 4 and sucks a predetermined amount of a reagent from it through a nozzle 2c, and then a predetermined reaction tube of the reaction unit 3. 3a (reaction tube in which the sample is dispensed)
It is designed to dispense.

The reaction unit 3 further includes a stirring unit 9 for stirring the mixed liquid of the sample and the reagent dispensed into a predetermined reaction tube 3a, and a photometric unit 10 for performing colorimetric measurement of the stirred mixed liquid. (Schematically shown in FIG. 1), a cleaning unit 11 for cleaning the inside of the reaction tube 3a before and after the analysis, and a mixed solution in the reaction tube 3a at a constant temperature (for example, a constant temperature) so that stable measurement can be performed. It has a constant temperature part 12 for maintaining the human body temperature).

As shown in FIG. 1 and FIG. 2, the photometric section 10 includes a halogen lamp 13 of continuous lighting type, a power supply device 14 for supplying a current to the halogen lamp 13, and a light emitted from the halogen lamp 13. It has a light diffraction grating 15 which transmits the mixed light of the sample and the reagent in the reaction tube 3a and disperses the transmitted light for each wavelength, and a detector 16 which detects the absorbance for each wavelength after dispersion, The reaction state of this mixed solution is detected as an absorbance (it should be noted that the light transmitted through the reaction tube 3a may be reflected by, for example, a mirror or the like and be incident on the diffraction grating 15).

The absorbance signal detected by the detector 16 is sent to the arithmetic and control unit 4. The arithmetic and control unit 4 has an amplifier 17, an A / D converter 18, and a CPU 19, and after amplifying the absorbance signal via the amplifier 17, converts it into digital data by the A / D converter 18, and by the CPU 19. The desired arithmetic processing is performed. The data obtained as a result of the arithmetic processing is sent to the display unit 6 and the printer 7 and displayed as analysis data.

Here, the configuration of the power supply device 14 of the photometric section 10 is shown in FIG.

The power supply device 14 is provided with a DC power supply 20 which outputs a DC voltage of, for example, a rated N volt. One of the two output terminals of the DC power source 20 has a resistor R
1 and the resistor R2 are connected in series. Also, the resistance R2
A relay circuit Ry is connected in parallel with. The output of the resistor R2 is connected to one of the two input terminals of the halogen lamp 13 which is a light source. The other output terminal of the DC power source 20 is directly connected to the other input terminal of the halogen lamp 13. The halogen lamp 13 is housed in a lamp house (not shown) in order to keep the internal temperature constant.

The control output terminal of the control circuit 21 equipped with a microcomputer is connected to the control terminal of the relay circuit Ry. This relay circuit Ry has a control circuit 21.
The contacts are opened and closed according to the control signal from the.

The resistance value r1 of the resistor R1 is the relay circuit Ry.
Is closed, that is, when no current flows through the resistor R2 (the resistor R1 is connected in series to form a circuit),
The voltage value applied to the halogen lamp 13, which is a load, is set in advance so as to be substantially the rated output voltage value of the halogen lamp 13. Also, the resistance value r2 of the resistor R2 (where r2 >> ry is the internal resistance of the relay circuit Ry).
Means that when the contact of the relay circuit Ry is in an open state (a resistor R1 and a resistor R2 are connected in series), the voltage value applied to the halogen lamp 13 is
It is preset to be approximately 90% of the rated output voltage value of. A circuit having the resistors R1, R2, and the relay circuit Ry, which connects the DC power source 20 and the halogen lamp 13, is referred to as a setting circuit C.

Next, the overall operation of the present embodiment will be described with particular emphasis on the operation of the power supply device 14.

FIG. 4 is a time chart showing the usage status of the analyzer of this embodiment in one day.

According to FIG. 4, in the analyzer of the present embodiment, the measurement time for performing a normal routine analysis is 6 hours (9:00 to 1).
4:00), and the remaining 18 hours is the measurement waiting time.

The control circuit 21 of the power supply device 14 is adapted to send a control signal to the relay circuit Ry on the basis of the predetermined measurement time and measurement standby time information. That is, at the time of measurement, the control circuit 21 sends a control signal to the relay circuit Ry to close the contact of the relay circuit Ry. As a result, since no current flows through the resistor R2, a current based on the rated output voltage flows through the halogen lamp 13, and light is emitted. This light is transmitted through the mixed liquid of the liquid sample and the reagent in the reaction tube 1a, is dispersed by the diffraction grating 15 for each wavelength, and then is incident on the detector 16, and the absorbance for each wavelength after dispersion is detected. It The absorbance data detected by the detector 16 is amplified by the amplifier 17, and then A
Converted to digital data via the / D converter 18,
Various analyzes are performed by the CPU 19.

On the other hand, when shifting from the measurement time to the measurement standby time, a control signal is sent from the control circuit 21 to the relay circuit Ry, and the contact of the relay circuit Ry is opened. As a result, since a current flows through the resistor R2, a current based on a voltage of about 90% of the rated output voltage flows through the halogen lamp 13, and light based on the current is emitted. Then, the above-described analysis processing is performed based on this emitted light.

FIG. 5 shows the relationship between the lighting voltage of the halogen lamp 13 and the life of the lamp 13 itself. According to FIG. 5, the lighting voltage is set to the rated output voltage (100
If the output voltage of 90%, which is 10% lower than that of%), is used, the life of the lamp 13 is extended about 3 to 4 times as long as when the lamp 13 is continuously used only at the rated output voltage (100%).

Now, assuming that the life is extended by about 4 times,
In this example, the lighting time in the measurement standby time is
It is about 1/4 when converted to life. Hereinafter, the coefficient (4) that extends the life is referred to as a life reduction coefficient.

That is, the lamp operating time converted into the life in this embodiment is expressed by the following equation.

Lamp lighting time (lifetime conversion) = lighting time during measurement + lighting time during measurement standby time / life reduction coefficient = lighting time during measurement + (lighting time during measurement standby time / 4) ... (1) This result In the case of the usage pattern of the measurement time of 6 hours and the measurement standby time of 18 hours, the conventional lamp lighting time (life conversion) was 24 hours / day, whereas in the present embodiment,
It can be seen that the lamp lighting time (lifetime conversion) is 10.5 hours / day, which is a significant improvement.

The equation (1) is input to the internal memory of the arithmetic and control unit 4, and the lamp lighting time (life conversion) is calculated based on the measurement time and measurement standby time information. Then, the life of the lamp 13 is set to about 2000 hours (H), and the result is compared with the lamp lighting time calculated as 2000H, and the result is displayed on the display unit 6, for example, as shown in FIG. ) Is displayed as a ratio with 2000 hours (H)), the operator performing the analysis can recognize the replacement time of the lamp 13 at a glance. For this reason, there is no problem that the lamp 13 reaches the end of its life during analysis and the analysis data up to that point is wasted, which is efficient.

In addition to or in place of the above display, when the lamp lighting time (converted to the life) reaches a predetermined value near 2000H, which is the life of the lamp 13, a buzzer from an alarm generation circuit (not shown). May be set to ring.

In this embodiment, the power supply device 14 is shown in FIG.
However, the present invention is not limited to this, and for example, the configuration shown in FIG. 7 or the configuration shown in FIG. 8 can be considered.

The power supply device 25 shown in FIG.
A DC power supply 26 for outputting a DC voltage of Volt is provided. The resistor R1a is connected in series to one of the two output terminals of the DC power supply 26. Further, the resistor R2a and the relay circuit Rya connected in series are connected in parallel with the resistor R1a. Resistor R1a and relay circuit Ry
The output terminal of a is connected to one of the two input terminals of the halogen lamp 13. The other output terminal of the DC power supply 26 is directly connected to the other input terminal of the halogen lamp 13.

A control output terminal of a control circuit 27 equipped with a microcomputer is connected to the control terminal of the relay circuit Rya. The relay circuit Rya opens and closes contacts according to a control signal from the control circuit 27.

The resistance value r1a of the resistor R1a is the voltage applied to the halogen lamp 13, which is a load, when the relay circuit Rya is open, that is, when no current flows through the resistor R2a (a resistor R1a is connected in series). value,
It is set in advance so as to be approximately 90% of the halogen lamp 13. Further, the resistance value r2a of the resistor R2 (where r2a >> ry is the internal resistance of the relay circuit Rya).
In a), the contact of the relay circuit Rya is closed (resistor R
1a and the resistor R2a are connected in parallel), the voltage value applied to the halogen lamp 13 is set in advance to be substantially the rated output voltage value of the halogen lamp 13.

In the power supply device 25 having the configuration shown in FIG. 7, during measurement, a control signal is sent from the control circuit 27 to the relay circuit Rya, and the contact of the relay circuit Rya is closed. As a result, since a current flows through the resistor R2a, the halogen lamp 1
A current based on the rated output voltage flows through 3. Further, when shifting from the time of measurement to the time of standby for measurement, a control signal is sent from the control circuit 27 to the relay circuit Rya, and the relay circuit Rya
The contact of opens. As a result, since no current flows through the resistor R2a, a current based on a voltage of about 90% of the rated output voltage flows through the halogen lamp 13. That is, in this configuration, as compared with the configuration of FIG. 3, except that the contact of the relay circuit Rya is closed during measurement and the contact of the relay circuit Rya is opened during measurement standby,
The effect is similar.

The power supply device 30 shown in FIG. 8 is a DC P equipped with a converter circuit and a regulator circuit 31 not shown.
OWER SUPPLY (hereinafter referred to as DC power supply) 32
A setting circuit 34 that has a terminal 33, a relay circuit Ryb, and sets a sensing voltage for comparison with a reference voltage of the regulator circuit 31, which will be described later, and a control circuit 35 that sends a control signal to the relay circuit Ryb. ing.

The DC power supply 32 is adapted to generate and output a DC voltage from an AC power supply (not shown) via a converter circuit, a rectifier circuit and the like. 2 of this DC power supply 32
The two output terminals are connected to the two input terminals of the halogen lamp 13 via the terminal 33.

Further, the two output terminals of the DC power source 32 are connected in parallel with the halogen lamp 13 as a load via the terminal 33, and the resistors R1b and R1 are connected in series with each other.
2b is connected. An intermediate point between the resistors R1b and R2b and an output terminal of the resistor R2b are fixed contacts of the relay circuit Ryb, respectively.

The relay circuit Ryb has a moving contact, and switches the moving contact to the fixed contact A or the fixed contact B according to a control signal from the control circuit 35. Resistance R
The input terminal of 1b and the output terminal of the relay circuit Ryb are connected to the regulator circuit 31 as sensing signal output terminals S1 and S2, respectively.

Further, the regulator circuit 31 has a sensing voltage (set based on the output voltage from the DC power source 32 and the resistance value set by the setting circuit 34) sent from the sensing signal outputs S1 and S2 and a reference voltage. Are compared with each other, and a transistor is controlled based on the comparison result to change the output voltage from the DC power supply 32. That is, the load fluctuation in the normal regulator circuit is generated by the fluctuation of the resistance value of the setting circuit 34,
By controlling the regulator circuit 31 according to the fluctuation of the sensing voltage due to the fluctuation of the resistance value, the halogen lamp 1
The output voltage applied to 3 is changed.

When the sensing voltage is set based on the output voltage from the DC power supply 32 and the resistance value of the resistor R1b, the regulator circuit 31 sets the output voltage from the DC power supply 32 to the rating of the halogen lamp 13. If the sensing voltage is set based on the output voltage from the DC power source 32 and the combined resistance value of the resistors R1b and R2b, the output voltage from the DC power source 32 is set to the rated output of the halogen lamp 13. The voltage is set to about 90%.

In the power supply device 30 having the configuration shown in FIG. 8, during measurement, a control signal is sent from the control circuit 35 to the relay circuit Ryb, and the moving contact of the relay circuit Ryb is connected to the fixed contact A. As a result, the resistance value set by the setting circuit 34 is only the resistance value of the resistor R1b, and the regulator circuit 31
By this operation, a current based on the rated output voltage flows through the halogen lamp 13. Further, when shifting from the time of measurement to the time of standby for measurement, a control signal is sent from the control circuit 35 to the relay circuit Ryb, and the moving contact of the relay circuit Ryb becomes the fixed contact B.
Connect to. As a result, the resistance value set by the setting circuit 34 becomes a combined resistance value of the resistors R1b and R2b, and the halogen lamp 13 is activated by the operation of the regulator circuit 31.
A current based on a voltage of about 90% of the rated output voltage flows through the device. That is, also in this configuration, although the configuration itself of the power supply device is different, the operation and effect are similar to those of the power supply device of FIG.

(Second Embodiment) The structure of this embodiment is characterized by the power supply system supplied to the halogen lamp 13. That is, according to this embodiment, as shown in FIG.
A POWER UNIT 37 is provided for supplying the output voltage sent from the AC power supply to the entire power supply system via the analyzer. A system power switch 38 capable of turning on / off an alternating current input (ACIN) to the POWER UNIT 37 is provided between the POWER UNIT 37 and the AC power source.

The system for supplying the output voltage from the POWER UNIT 37 is a system for supplying the output voltage to the power supply device 14 for supplying the voltage to the halogen lamp 13 of the photometric section 10 and the other systems (the arithmetic and control unit 4). Etc., and a system for supplying an output voltage to the constant temperature part 12 etc.). The rest of the configuration is the same as the configuration shown in FIGS. 1 and 2 of the first embodiment (the configuration of the power supply device 14 itself may be a conventionally known configuration), and the description thereof is omitted. .

Then, the halogen lamp 13 of the photometry unit 10
A system for supplying an output voltage to the power supply device 14 for supplying a voltage to the power supply device is provided with a dedicated switch circuit 39 capable of supplying (ON) / interrupting (OFF) the output voltage. The configuration of the other analyzers is substantially the same as the configuration shown in FIGS. 1 and 2.

Next, the operation of this embodiment will be described.

FIG. 10 shows the halogen lamp 1 when the system power switch 38 is switched from OFF to ON.
3, the system rise time of the constant temperature part 12 and other circuit systems (rise time until the system reaches a stable state) is shown. That is, according to FIG. 10, the rise time of the halogen lamp 13 is about 15 minutes, while the rise time of the constant temperature portion 12 takes about 30 minutes. Therefore, if the power of the entire analyzer is turned off when replacing the lamp as in the conventional case, and the power of the entire analyzer is turned on after the lamp is replaced, the replaced lamp 13 is in spite of being up. It was necessary to wait for the operation of the analyzer to start until the constant temperature part 12 started up, and during that time, it was not possible to respond promptly to an urgent patient.

However, according to this embodiment, since the exclusive switch circuit 39 is provided in the system for supplying the output voltage to the power supply device 14 for supplying the voltage to the halogen lamp 13, the exclusive switch circuit 39 is replaced when the lamp is replaced. It suffices to turn it off and shut off only the system that supplies power to the lamp 13. When the lamp replacement is completed, the dedicated switch circuit 39 may be turned on. In other words, when exchanging the lamp, it is not necessary to turn on / off the power of the analyzer itself, so that it is not necessary to wait for the rise of the circuit group such as the constant temperature section 12 in the apparatus, which takes a relatively long time to rise. Therefore, the operation of the analyzer can be restarted about twice as fast as in the conventional case, and swift response can be made even to an urgent patient.

(Third Embodiment) The schematic construction of the third embodiment is as follows.
The configuration is the same as that shown in FIGS. 1 and 2 of the first embodiment (the configuration of the power supply device 14 itself may be a conventionally well-known configuration), and the description thereof will be omitted.

The present embodiment is characterized by the lamp house that houses the halogen lamp 13. This lamp house 4
1 is shown in FIG. The lamp house 41 includes a mounting portion 42 to which the halogen lamp 13 is detachably mounted,
And a box-shaped lamp house main body 43 having an upper surface opening. The mounting portion 42 serves as an upper lid of the lamp house main body 43. Then, the mounting portion 42 to which the lamp 13 is mounted is housed in the lamp house main body 43, and the mounting portion 42 is mounted on the lamp house main body 43 by the screw 44 provided on the mounting portion 42, whereby the lamp 13 is installed. It is adapted to be housed in the lamp house 41.

When replacing the lamp, the screw 44 of the mounting portion 42 is removed to remove the mounting portion 42, and the lamp 13 is replaced with a new one.

By the way, a thermal label 45 that changes its color, for example, depending on the ambient temperature change is provided at a required position on the outer surface of the mounting portion 42. This thermal label 4
5 changes to a predetermined color (e.g., green) below the set temperature (a temperature that is safe even if the lamp exchanger contacts the mounting portion 42), and changes to a predetermined color (e.g., red) above that temperature. ing.

That is, according to the present embodiment, when the temperature of the lamp itself and its surroundings is awaited when replacing the lamp, the thermal label 45 provided on the mounting portion 42 is used.
By checking the color of, the temperature change of the lamp itself and its surroundings can be easily recognized, so that the lamp replacement timing (the label 45 is green) can be easily grasped and the efficiency is improved. Further, since the label 45 is provided on the mounting portion 42 which the replacement person actually contacts when replacing the lamp, the temperature of the mounting portion is always lowered when the lamp can be replaced, which is very safe.

The thermal label 45 is not limited to the change of the entire color, and, for example, as shown in FIG. 12, when the temperature is higher than the set temperature, "CAUTION HOT" is displayed, and when the temperature is lower than the set temperature, the display disappears. It may have been done. Further, not limited to the thermal label 45, for example, a paint whose color or the like changes due to a change in ambient temperature may be used.

[0070]

As described above, according to the automatic chemical analyzer according to the first to fifth aspects, the output power supplied to the light source such as a halogen lamp is a predetermined amount (a predetermined amount from the rated output value in the standby state for measurement). Since it is set to a value lower than the rated output value (about 10% of the rated output value), the life of the light source in the standby state for measurement can be extended by about 4 times as compared with the case where the light source is used at the rated output value. In other words, even if the analyzer is ready for rapid analysis 24 hours a day (the light source is continuously turned on 24 hours a day), the life of the light source is extended, the frequency of light source replacement is reduced, and the cost related to the light source is reduced. Therefore, it is possible to reduce the time and labor required for light source replacement, and reduce the light source replacement stop time.

According to the automatic chemical analyzer described in claim 6, the power supply to the light source can be turned on / off without turning on / off the power of the entire analyzer. There is no need to shut off the power of the entire analyzer when replacing. As a result, the light source can be exchanged without stopping the driving of the analysis device, and the startup time of the entire device related to the light source exchange can be shortened and the analysis efficiency can be improved.

Further, according to the automatic chemical analyzer of the present invention, the temperature of the case and the vicinity thereof, such as a preset temperature (set temperature), can be set at a desired position of the case housing the light source. Since the temperature display means for changing the display is provided at the boundary, for example, if the preset temperature is set to a temperature at which the light source can be replaced (contact with the light source), the person who replaces the light source can replace the lamp. Also, the temperature of the lamp house can be reliably recognized, and the light source can be replaced efficiently and more safely.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an automatic chemical analyzer according to first to third embodiments of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a photometric unit according to the first embodiment.

FIG. 3 is a circuit diagram showing a schematic configuration of a power supply device in the photometric section shown in FIG.

FIG. 4 is a time chart showing a daily usage pattern of the analyzer according to the first embodiment.

FIG. 5 is a graph showing the relationship between the lighting voltage and the life of the halogen lamp in the first embodiment.

FIG. 6 is a diagram showing an embodiment for displaying a lighting time (converted to a life) of a halogen lamp in the first embodiment.

FIG. 7 is a circuit diagram showing another configuration of the power supply device in the photometric unit shown in FIG.

FIG. 8 is a circuit diagram showing another configuration of the power supply device in the photometric unit shown in FIG.

FIG. 9 is a circuit diagram showing a power supply system supplied to a halogen lamp according to a second embodiment.

FIG. 10 is a graph showing the system startup time of a halogen lamp, a constant temperature part, and other circuit systems.

FIG. 11 is a perspective view showing a schematic configuration of a lamp house accommodating a halogen lamp.

FIG. 12 is a diagram showing a display change of a thermal label in FIG.

FIG. 13 is a circuit diagram showing a conventional power supply system supplied to a halogen lamp.

[Explanation of symbols]

 1 sample disk (sample part) 1a sample 2 reagent part 2a reagent container 3 reaction part 3a reaction tube 4 arithmetic control device 5 operation part 6 display part 7 printer 10 photometric part 12 constant temperature part 13 halogen lamp 14 power supply device 20 DC power supply 21 control Circuit 25 Power supply device 26 DC power supply 27 Control circuit 30 Power supply device 31 Regulator circuit 32 DC POWER SUPPLY 33 Terminal 34 Setting circuit 35 Control circuit C Setting circuit R1, R2, R1a, R2a, R1b, R2b Resistance Ry, Rya, Ryb Relay circuit 37 POWER UNIT 38 System power switch 39 Dedicated switch circuit 41 Lamp house

Claims (8)

[Claims] 1. An automatic chemistry for calculating and displaying data such as a concentration value of the sample by analyzing light emitted from a light source that is continuously turned on and transmitted through a mixed liquid of a sample and a reagent. In the analyzer, a power supply means for supplying output power to the light source, and the output power supplied from the power supply means to the light source is set to a substantially rated output value of the light source at the time of measurement of the analyzer, and the measurement standby. An automatic chemical analysis device, characterized in that it comprises a setting means for setting a value lower than the rated output value by a predetermined amount. 2. The automatic chemical analyzer according to claim 1, wherein the light source is a halogen lamp. 3. The automatic chemical analyzer according to claim 2, wherein the predetermined amount is approximately 10% of a rated output value. 4. The integrating means for integrating the life-converted lighting time of the halogen lamp, wherein the integrating means uses the actual lighting time at the time of measurement, and the actual lighting time at the time of waiting for the measurement as a life reduction coefficient. The automatic chemical analyzer according to claim 3, wherein the divided value is used. 5. The automatic chemical analyzer according to claim 4, wherein the life reduction coefficient is 4. 6. An automatic chemistry for calculating and displaying data such as the concentration value of the sample by analyzing the light emitted from the light source that is continuously turned on and transmitted through the mixed liquid of the sample and the reagent. An automatic chemical analysis device, comprising: a power supply means for supplying output power to the light source; and a dedicated switching circuit capable of turning on / off only the output power supplied to the light source. 7. An automatic chemistry for calculating and displaying data such as the concentration value of the sample by analyzing the light emitted from the light source that is continuously turned on and transmitted through the mixed liquid of the sample and the reagent. An automatic chemical analysis device, comprising: a case for accommodating a light source, and temperature display means for displaying the temperature of the case and its surroundings at a desired position of the case. 8. The automatic chemical analyzer according to claim 7, wherein the temperature display means changes the display at a set temperature as a boundary.