JPS60212999A - X-ray equipment - Google Patents

Abstract

PURPOSE:To reduce noise and save power consumption by detecting temperature variation of an X-ray tube device and controlling rotation and stop of a cooling fan. CONSTITUTION:The second temperature detector 7 which operates at a specified temperature set between atmosphere temperature and allowable limit temperature is installed on an anode side of X-ray tube device 4. The detector 7 detects temperature variation caused by use of the X-ray tube device 4. By detected signal, a cooling fan is rotated when temperature of the X-ray tube device 4 is high, and the cooling fan is stopped when temperature is low. Since the cooling fan 5 is rotated only when cooling is required, noise to a patient is reduced and power consumption is saved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application of the Invention The present invention relates to an X63 device having a cooling fan for forced air cooling of an X-ray tube device, and in particular to an X#i! The present invention relates to an xt51 device that can control rotation and stop of a cooling fan by detecting temperature changes in a pipe device.

Conventional technology and problems X-ray tube device fK As the input (load) is increased, xm
The temperature of the xm tube device is gradually rising as the heat outside of the preparative device consumed in irradiation changes into heat (in addition, heat generation from the heated filament and The heat generated by the power consumption of the drive motor when starting the anode also contributes to the temperature rise of the Xll1! tube device. Due to these heat generation, the Xll11 tube device may reach the permissible limit temperature (for example, 75°C) K. In that case, upper d
The temperature detector installed in the XIfs pipe device is activated,
An X-ray exposure prohibition signal is sent to the X1lJ control device, and fluoroscopy and imaging after μ are no longer possible. In such a case, the X@ device must be used again after a cooling down period.
It is necessary to cool the line tube equipment. This X-ray tube device is normally cooled by natural cooling (air cooling), but to promote cooling, a cooling fan is sometimes installed to forcibly exhaust the warm air around the tube container.

Here, in X-ray diagnosis of areas other than the digestive system, the sum of inputs applied to the X-ray tube device is not very large, and the X-ray tube device almost never reaches its allowable limit temperature. Therefore, in this case, there is no need to provide a cooling fan. However, in X-ray examinations of the digestive system such as the stomach and intestines, the total input to the Xg tube device is larger than in examinations of other parts (
The X-ray tube apparatus may reach a temperature close to its permissible limit even during normal use, in which several patients are examined repeatedly after several minutes of downtime. Therefore, an X-ray tube apparatus for examining the gastrointestinal system is equipped with a cooling fan.

However, conventionally, the rotation and stop of the cooling fan has been controlled by turning on and off the main power of the X-ray device, so the cooling fan is constantly rotating while the X-ray device is energized. Ta.

Therefore, as shown in FIG. 1, the patient C who is at a distance LK of about 1 m from the cooling fan B attached to the X-ray tube device A is exposed to the rotation noise of the cooling fan B during the examination. Fell.

Additionally, in order to stabilize the operation of the Xts device, the
The power is often turned on for more than 0 minutes, but even when the temperature to the X-ray tube device is equal to the ambient temperature and cooling fan B does not need to rotate, cooling fan B continues to rotate, causing waste. It consumed a lot of electricity.

Purpose of the Invention The present invention has been made to solve the above-mentioned problems, and detects temperature changes in the X-ray tube device and rotates the cooling fan.
An object of the present invention is to provide an X-ray apparatus that can control stoppage, reduce noise to a subject, and save power consumption.

According to the present invention, the structure of the invention and the above object are as follows: a first temperature detector that detects the temperature of the X-ray tube device and sends an X-ray exposure prohibition signal to the X-ray control device when the temperature exceeds the allowable limit temperature; In an X-ray apparatus having a cooling fan for forced air cooling of the X-ray tube apparatus, a second temperature detector is provided on the anode side of the X-ray tube apparatus, which operates at a predetermined temperature between the ambient temperature and the allowable limit temperature. and transmits a detection signal from the second temperature detector to an X-ray control device to control rotation and stop of the cooling fan.
This is achieved by providing a wire device.

Embodiments of the Invention Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The X@ device according to the present invention has a power source 1 as shown in FIG.
, X-ray control device 2, high voltage generator 3, X,il
It has a J-tube device 4, a cooling fan 5, a first temperature detector 6, and a second temperature detector T. The power supply 1 supplies low voltage power to the high voltage generator 3 and also supplies the X-ray control device fI! , 2 as well. The X-ray control device 2 sets X-ray exposure conditions such as the tube voltage, tube current, and exposure time of the X-ray tube that are optimal for X-ray diagnosis, and also controls the power supply 1.
to control the low voltage power supplied to the high voltage generator 3 from the
It controls the X-ray exposure operation of the entire X-ray apparatus. The high voltage generator 3 boosts the low voltage power supplied from the power source 1 to a high voltage necessary for generating X-rays, and applies it between the anode 10 and filament 90 of the X-ray tube 8 of the X-ray tube device 4. It is something. A cooling fan 5 is provided near the X-ray tube device 4. This cooling fan 5 is
Temperature increases due to heat generated when a high voltage is applied between the anode 10 of the ray tube 8 and the filament 90 and X-rays are emitted from the anode 10, heat generated by power consumption of the drive motor of the rotating anode, etc. The elevated X-ray tube device 4 is forcedly cooled by air, and its rotation and stop are controlled by the X-ray control device 2 described above.

The X-ray tube device 4 is 5K as shown in FIG.

It has a tube container 11, an X-ray tube 8 built into the tube container 11, and a rotating anode drive motor 12, and the inside of the tube container 11 is filled with insulating oil. Inside the cover 13 on the anode 10 side of the tube container 11 are a first temperature detector 6 such as a thermostat and a second temperature detector 6, such as a thermostat. 57 are provided. The first temperature detector 6 detects a temperature rise due to the use of the X-ray tube device 4, and
When the X-ray tube device 4 exceeds the permissible temperature limit (for example, 75° C.), it is activated, and as shown in FIG.
1 to the Xm control device 2. As a result,
Xa from the X-ray tube device 4 according to the command of the X-ray control device 20
Exposure is stopped.

The second temperature detector 7 sends a cooling fan 50 rotations and a stop signal to the x, 16 control device 2, and detects the ambient temperature of the X-ray tube device 4 (this is the temperature of the examination room, e.g. It is set to detect a predetermined temperature (for example, 50°C) between the above-mentioned allowable limit temperature (20°C) and to operate when the predetermined temperature is reached. That is, when a temperature higher than the predetermined temperature is detected, the cooling fan 50
A rotation signal S2 (see FIG. 2) is sent to the X@control device 2, and when a temperature lower than a predetermined temperature is detected, a stop signal SS for the cooling fan 5 is sent out. And these signals S2. In response to Ss, X-ray control device 2
A fan drive signal S4 is sent from the cooling fan 50.
Control rotation and stop.

The state in which the cooling fan rotates 50 times and then stops will be explained with reference to the fan drive circuit shown in FIG. 4.

First, FIG. 4(a) shows a case where the temperature of the X-ray tube device 4 is lower than a predetermined temperature. At this time, the second temperature detector 7 does not operate, and the normally closed contact 7' remains closed. Since this contact 7' is closed, the DC relay 14 connected in series with it is energized, and the normally open contact 14' of this DC relay 14 remains open. As a result, the AC power supply to the cooling fan 5 is cut off, and the cooling fan 5 is stopped. Next, by using the X-ray tube device 4, the X-ray
If the temperature of the wire tube device 4 gradually rises and exceeds a predetermined temperature between the ambient temperature and the allowable limit temperature, the second temperature detector 7 detects this and is activated. At this time, the fourth
Contact 7' of the second temperature sensor 1 as shown in Figure (blK)
is opened and the DC voltage of the DC relay 14 is cut off,
The normally open contact 14' is closed. The "close" K of this contact 14' connects the AC power to the cooling fan 5, causing the cooling fan 5 to rotate. Next, as the cooling fan 5 rotates, the X-ray tube device 4 is cooled and its temperature drops, and when the temperature falls below the predetermined temperature, the second temperature detector 7 detects this and the fourth As shown in Figure (a), the contact T' closes. Then, the DC voltage is conducted to the DC relay 14 and excited, opening the contact 14'. When the contact 14' is opened K, the AC power supply to the cooling fan 5 is cut off, and the rotation of the cooling fan 5 is stopped. Thereafter, changes in the temperature of the X-ray tube device 4 are detected, and the cooling fan 5 repeatedly rotates and stops as appropriate.

Note that the set of the predetermined temperature of the second temperature detector 70 is as follows:
If you are examining a large number of patients in a row, set the ambient temperature (examination room temperature) to a lower value and increase the cooling fan's 50 rotation time, and if you are examining a small number of patients at intervals, Cooling fan 5 at a value close to the allowable limit temperature
It may be set arbitrarily, such as by shortening the 0 rotation time.

Effects of the Invention As explained above, the present invention provides X118! Since a second temperature detector 7 that operates at a predetermined temperature between the ambient temperature and the allowable limit temperature is provided on the anode side of the tube device f4, temperature changes due to the use of the Xl1I tube device 4 can be detected. Based on the detection signal, when the temperature of the X-ray tube device 4 is high, the cooling fan 5 can be rotated, and when the temperature is low, the cooling fan 5 can be stopped from rotating. Therefore, the cooling fan 5 can be rotated only when cooling is necessary, thereby reducing noise to the subject. In addition, the cooling fan 5 does not rotate just when the main power of the X-ray apparatus is turned on, but only when the temperature reaches a predetermined temperature or higher due to the use of the XSt equipment 4, so it wastes power compared to conventional It is possible to save power consumption by eliminating consumption.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the positional relationship between the cooling fan and the subject, FIG. 2 is a block diagram showing the X-ray apparatus according to the present invention, FIG. 3 is an explanatory diagram showing the X-ray tube apparatus, and FIG. Figure (a),
fb) is a circuit diagram showing the operation of the fan drive circuit. DESCRIPTION OF SYMBOLS 1... Power supply, 2... X-ray control device, 3... High voltage generator, 4... X-ray tube device, 5... Cooling fan, 6... First temperature detection 7...Second temperature detector, 7'...Contact, 10...Anode, 11.
...Tube container, 14...DC relay, 14'...connection
Point, Sl...X-ray exposure prohibition signal, Sl...cooling fan rotation signal, S3...cooling fan stop signal, S4...fan drive signal. Figure 1 Figure 2

Claims (1)

[Claims] A power supply, an X-ray control device that controls the X-ray irradiation operation, and an XI
Ij! A high voltage generator that boosts the high voltage necessary for generation,
An X-ray tube device that emits X-rays and a temperature of this X-ray tube device are detected and an X-ray exposure prohibition signal is sent when the temperature exceeds the permissible limit.
In an X-ray device having a first temperature detector that sends out a temperature to a radiation control device, and a cooling fan that forcibly cools the X-ray tube device, the anode side pressure of the X-ray tube device, its ambient temperature, and an allowable limit temperature. A second temperature detector is provided which operates at a predetermined temperature between 1 and 2, and a detection signal from the second temperature detector is sent to an X-ray control device to control rotation and stop of the cooling fan. X-ray equipment.