JP2009066182A - Suction device and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction device that automatically stops its suction operation according to the amount of a sucked material stored in a container, so it has improved operation reliability and convenience of the device for its users. <P>SOLUTION: The suction device includes a suction duct 11 with a suction port formed at its one end, a suction pump 2 for applying suction force to the suction duct, a container 3 provided on the suction duct to store a material sucked through the suction port, an open valve 5 to expose a space between the container and the suction pump to open air, sucked material amount measuring means 31 to measure the amount of material stored in the container, and control means 8 to stop the operation of suction pump 2 according to the measurement result from the measuring means 31 and open the open valve 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a suction device, and more particularly to a suction device that sucks liquid.

  A suction device is used to suck body fluids such as blood and sputum from a patient's human body at the time of surgery, examination, treatment, and the like. Such a suction device used for medical use is provided with a suction pipe having a suction port formed at one end thereof, a suction pump for biasing suction force to the suction pipe, and an aspirating material provided on the suction pipe. And a container. With such a configuration, by applying a suction force from the suction pump to the suction pipe, it is possible to suck a suction object such as a human eyelid from the suction port. At this time, since the connection port with the container provided on the suction pipe is formed above the container (for example, the lid), when the sucked sucked material reaches the container on the suction pipe, the connection is established. It falls by its own weight from the mouth to the bottom of the container. Thereby, while being able to accumulate a suction thing in a container, it can control that a suction thing flows into the suction pump side.

  In such a suction device, when the suction pump is stopped, the suction pipe and the inside of the container are kept at a negative pressure, so that it takes time to restart the suction pump, and suction force is still applied to the suction port. There is a problem that the suctioned material accumulated in the container flows into the pump side. In order to solve this problem, in Patent Document 1, an atmospheric pressure release valve is provided in the suction line. And by controlling this atmospheric pressure release valve to open simultaneously with the stop of the suction pump, it is possible to suppress negative pressure in the suction line when the pump is stopped, realizing a quick restart, and a suction force The remaining of the is suppressed. Further, in this configuration, when the suction by the suction pump is temporarily stopped, the atmospheric pressure release valve provided in the suction pipe is opened while the suction pump is driven, so that the inside of the suction pipe is almost at atmospheric pressure. When returning and stopping the suction and starting the suction again, it is possible to start quickly by closing the atmospheric pressure release valve. Further, in Patent Document 2, when a patient during suction causes a large body movement such as coughing or sneezing, the inside of the container becomes negative pressure, and the sealed water in the container flows backward. An electromagnetic valve for suppressing negative pressure is provided. In particular, the electromagnetic valve is controlled in accordance with the pressure in the container or the water level.

JP 2004-49704 A JP 2002-65843 A

  Here, in the suction device having the above-described configuration, when a large amount of suction material accumulates in the container, the suction material in the container may reach the connection port with the suction pipe, and the suction material itself may flow into the suction pump side. Can occur. For this, nurses who perform suction must monitor the amount of sucked material, and care must be taken to automatically stop suction, which may reduce user convenience. There was a problem. In addition, in the technique of the above-mentioned patent document 2, since the water level of the sealed water in the container is only measured, processing such as suction stop is realized according to the accumulated amount of aspirated material accumulated in the container. I can't. In Patent Document 2, the pressure in the container is measured according to the water level of the sealed water, and the suction pressure and the opening / closing of the electromagnetic valve are controlled accordingly without stopping the suction pump. However, since the suction is still continued, there is a possibility that suction is executed from the suction port or the suctioned material flows into the suction pump side, and the reliability of the device, and There arises a problem that the convenience of the user cannot be improved.

  For this reason, according to the present invention, suction is automatically stopped according to the amount of sucked material accumulated in the container, thereby improving the reliability of the device and improving the convenience of the user. It is an object of the present invention to provide a suction device that can be used.

  Therefore, a suction device according to one aspect of the present invention includes a suction pipe having a suction port formed at one end thereof, a suction pump that biases suction force to the suction pipe, and a suction port provided on the suction pipe. A container for accumulating the aspirated material, an open valve for opening the space between the container and the suction pump to the outside air, an aspirated material amount measuring means for measuring the amount of the aspirated material accumulated in the container, and the aspirated material amount measurement And a suction stop control means for controlling to stop the suction operation of the suction pump and to open the open valve in accordance with the measurement result by the means.

  According to the above invention, first, when suction is started by the suction pump and sucked material is sucked from the suction port, the sucked material is accumulated in the container provided on the suction pipe, and the suction material is accumulated by continuing the suction. The amount increases. At this time, the aspirated material measuring means measures the accumulated amount of the aspirated material in the container. According to the measurement result, for example, when the aspirated material amount reaches a predetermined amount, the aspiration stop control means At the same time as controlling to stop the suction operation, the release valve provided on the suction pipe is opened. As a result, the suction operation is automatically stopped according to the amount of sucked material, and the container and the suction line are opened to the outside air, so that the negative pressure state in the container and the suction line can be prevented from continuing. It is possible to suppress the continuation of suction and the suctioned material from flowing into the suction pump side. Therefore, it is possible to improve the reliability of the apparatus and the convenience of the user.

  And in this invention, the said suction | attraction material amount measurement means measures the amount of suction | inhalation thing in a container by measuring the raising means which rises with the liquid level of the suction thing accumulated in the container, and the raising state of this raising means. And a rising measuring means for measuring. In the present invention, the ascending means is a float that floats near the liquid level of the aspirated material accumulated in the container, and the ascending measuring means detects the amount of the aspirated material in the container by detecting the height of the float. This is a float position measuring means for measuring. Furthermore, in the present invention, the float is provided with a magnetic force generating means, and the float position measuring means detects the magnetic force from the magnetic force generating means provided in the float and detects the height of the float according to the detection result. The structure is taken.

  As described above, ascending substance amount measuring means is provided with an ascending means that rises together with the liquid level of the aspirating substance, and by measuring the ascending state of the ascending means, the amount of the aspirating substance accumulated in the container is automatically measured. Then, as described above, the suction pump is stopped and the release valve is opened. In particular, by using a float that floats on the attracted substance in the container as the raising means, and measuring the magnetic force of the magnet provided on the float, the height of the float can be detected and the amount of attracted object can be measured. Therefore, since it can be realized with a simple configuration, the assembly of the apparatus can be facilitated and speeded up, and the cost can be reduced.

  Moreover, in this invention, the structure of having provided the said float and the float position measurement means so that it may be located in the substantially centerline along the height direction of a container is taken. As a result, both the float and the float position measuring means are located in the center of the container, making it easier to align the device when it is assembled, and suppressing the misalignment of these devices to more reliably detect the amount of sucked material. can do.

  Further, in the present invention, the connection port between the suction pipe and the container located on the suction pump side when the liquid rises with the liquid level of the suction material accumulated in the container and rises to a predetermined height. A configuration in which a closing float for closing is provided is adopted. As a result, the closing float rises as the liquid level of the sucked material rises, closing the connection port between the container and the suction pipe located on the suction pump side. Thereby, it can suppress more effectively that an aspiration thing flows into the suction pump side.

  In another aspect of the present invention, a suction pipe having a suction port formed at one end, a suction pump for biasing the suction force to the suction pipe, and suction sucked from the suction port provided on the suction pipe A method for controlling a suction device comprising a container for storing an object and an open valve for opening the space between the container and the suction pump to the outside air, and measuring the amount of the suction object stored in the container In accordance with this measurement result, the suction pump is controlled to stop the suction operation and to open the open valve.

  Since the present invention is configured and functions as described above, according to this, in order to automatically stop the suction and open the suction pipe to the outside air in accordance with the amount of sucked material accumulated by suction. When the suction is stopped, it is possible to prevent the negative pressure state in the container or the suction pipe from being maintained, and it is possible to suppress the continuation of suction and the suctioned material from flowing into the suction pump. As a result, the suction can be stopped more reliably, the reliability of the apparatus can be improved, and the convenience of the user can be improved.

  The present invention is configured to automatically and more reliably stop suction and suppress the suction material from flowing into the suction pump side according to the amount of the suction material sucked by the suction device. Has characteristics. In addition, it has a feature in the configuration for measuring the amount of aspirated material, so that the configuration of the apparatus can be simplified and the cost can be reduced.

  Hereinafter, specific configurations and operations of the present invention will be described with reference to examples. In the embodiment, a medical suction device used to suck body fluid such as blood and sputum from a patient's human body at the time of surgery, examination, treatment, etc. will be described as an example. It is not limited. That is, the suction device of the present invention can be used for any purpose and for sucking any object.

  A first embodiment of the present invention will be described with reference to FIGS. 1 to 3 are diagrams illustrating the configuration of the suction device, and FIGS. 4 to 6 are diagrams illustrating the operation of the suction device.

[Constitution]
The suction device according to the present embodiment is for sucking body fluid such as blood and sputum from a patient's human body at the time of surgery, examination, treatment, and the like. The appearance is shown in FIG. 2 and 3 are block diagrams showing the configuration of the suction device.

  As shown in FIG. 1, the suction device according to the present embodiment first includes a main body 10 formed in a substantially rectangular parallelepiped shape by assembling a plurality of housing parts. The concave portion formed on the front surface of the main body 10 is equipped with a suction bottle 3 (container) for accumulating a suction substance and a safety bottle 4 connected to the suction bottle 3 through a suction pipe 12. Has been. The safety bottle 4 functions to prevent water droplets and the like scattered from the suction bottle 3 from accumulating and flowing into the suction pump 2.

  Further, as shown in FIG. 2, the suction pipe 12 is further extended through a connection port 11 b formed in the lid portion of the suction bottle 3 through the inside of the suction bottle 3 (see reference numeral 11), and its end The part forms the suction port 11a. And on the opposite side, the suction lines 11 and 12 extend until they are connected to the suction pump 2 through the safety bottle 4 (see reference numeral 13). Further, the suction pipes 11, 12, and 13 are formed to extend to the pipe line 14 for discharging the gas sucked from the suction pump 2 to the outside. In other words, the suction pipes 11, 12, 13, 14 have a suction port 11 a formed on one end side, and the suction bottle 3, the safety bottle 4, and the suction pump 2 are connected in the middle, A discharge port is formed on the end side.

  Although not shown in FIG. 1, a suction pump 2 that biases suction force to the suction pipes 11, 12, and 13 is provided inside the main body 10. The suction pump 2 is, for example, a diaphragm pump. The suction pipe 13 that connects the suction pump 2 and the safety bottle 4 is provided with an electromagnetic valve 5 (open valve) that opens the suction pipe 13 to the outside air (atmosphere). When the electromagnetic valve 5 is opened, the suction pipe 13, the safety bottle 14, the connection pipe 12 and the suction bottle 3 connected to the suction pipe 13, and the connection pipe 11 are almost at atmospheric pressure. Become. In addition, although the pressure control valve 6 and the vacuum gauge 7 are also provided in the suction pipe line 13, since this structure is a general structure, the detailed description is abbreviate | omitted.

  And as shown in FIG. 1, the suction bottle 3 is formed in the cylindrical shape which has a bottom face so that the suction | attraction material X can be accumulate | stored inside. The upper opening of the suction bottle 3 is provided with a disc-shaped lid 30, and the lid 30 is connected to the above-described suction pipes 11 and 12, that is, the suction port side 11 a. And a connection port 12a connected to the safety bottle 3 and the suction pump 2 side.

  Further, on the back side of the central portion of the lid portion 30, that is, above the inside of the suction bottle 3, as shown in FIG. A first float 31 floating in the vicinity is provided. And this 1st float 31 functions so that it may rise with a raise of the liquid level of the aspirate X accumulated in the suction bottle 3 (rising means). In addition, since the 1st float 31 is provided in the center part by the side of the back surface of the cover part 30 as mentioned above, it is arrange | positioned so that it may be located in the approximate center of the liquid level vicinity of the aspirate X, and may float.

  And the 1st float 31 is specifically, the periphery of the upper part is formed constricted with respect to an upper end part and a lower end part. Correspondingly, a substantially cylindrical guide 33 having a predetermined length extending from the back surface of the lid portion 30 in the depth direction of the suction bottle 3 is provided on the back surface side of the lid portion 30. The guide 33 has a bottom surface having a through-hole at the center and forms a space inside. And the constriction part formed in the 1st float 31 has penetrated the through-hole formed in the bottom face of the said guide 33, and the upper end part of the 1st float 31 is the space part in the substantially cylindrical guide 33 It becomes the state accommodated in. At this time, since the constricted portion of the first float 31 has a predetermined length, the constricted portion can reciprocate through the through hole of the guide 33, and the upper end portion of the first float is placed in the space portion of the guide 33. It can move up and down along. As a result, when the amount of the suction substance X in the suction bottle 3 increases and the liquid level rises, the first float 31 rises together with the liquid level, but the upper end of the first float 31 along the guide 33 Moves upward to approach the lid 30. That is, the guide 33 forms a rising path of the first float 31 and stabilizes its rising operation. In addition, a magnet 32 (magnetic force generating means) that generates a predetermined magnetic force is provided at the upper end of the first float 31.

  Here, the lid portion 30 of the suction bottle 3 is pressed from above by a suction bottle pressing portion 9 that is rotatably provided on the main body portion 10 (see FIG. 1). The suction bottle holder 9 includes a magnetic sensor such as a Hall element or a magnetoresistive element that detects the magnetic force of the magnet 32 corresponding to the magnet 32 provided at the upper end of the first float 31 described above. 90 is provided. That is, the magnetic sensor 90 is provided so as to be positioned substantially at the center near the upper end where the lid 30 of the suction bottle 3 is located.

  The magnetic sensor 90 detects the intensity of the magnetic force of the magnet 32 and transmits the detection result to the control unit 8. Therefore, the magnetic sensor 90 can detect the rising state of the first float, that is, the position of the first float in the height direction, as will be described later, according to the presence or absence, strength, or the like of the detected magnetic force. It functions as a measurement means (a rise measurement means). As a result, the liquid level height of the suction object X accumulated in the suction bottle 3, that is, the amount of the suction object X can be measured. For example, when it is detected that the magnetic force is equal to or higher than a preset value, the liquid level of the suction object X in the suction bottle 3 reaches a predetermined height, and the accumulation amount of the suction object X reaches a predetermined amount. It can be detected.

  From the above, the first float 31 that includes the magnet 32 and rises according to the liquid level, and the magnetic sensor 90 that detects the rise state, serve as an attracted substance amount measuring unit that measures the amount of the attracted substance X in the suction bottle 3. Function.

  Here, as described above, since the magnetic sensor 90 and the first float 31 are positioned on substantially the center line along the height direction of the suction bottle 30, it is easy to align the apparatus during assembly. Become. That is, the first float 31 is provided on the back surface side of the substantially circular lid portion 30, but the first float 31 is positioned at the center regardless of the orientation of the lid portion 30, and suction Since the bottle holding part 9 holds the center of the lid part 30 from above, the suction bottle holding part 9 is also located at the center. Therefore, these positional shifts can be suppressed, and the amount of sucked material can be detected more reliably. Moreover, as above-mentioned, since the suction bottle holding | suppressing part 9 hold | suppresses the suction bottle 3 from upper direction and an apparatus is assembled | attached, the dispersion | variation in the vertical position of the suction bottle 3, the magnetic sensor 30, etc. can be suppressed. Further, the suction bottle 3 is pressed from above, and the suction bottle presser 9 only needs to be rotated at the time of attachment / detachment.

  Moreover, as shown in FIG. 2, the inside of the suction bottle 31 is on the back side of the connection port 12a with the safety bottle 4 formed on the lid 30 and the suction conduit 12 located on the suction pump 2 side. A second float 34 is provided which has a density lower than that of the suction material X which is a liquid and floats near the liquid surface of the suction material X. Therefore, the second float 34 functions so as to rise as the liquid level of the sucked material X accumulated in the suction bottle 3 rises. Correspondingly, on the back surface side of the lid portion 30, there is a space portion of a predetermined length from the back surface of the lid portion 30 in the depth direction of the suction bottle 3, and the side wall of the space portion. A second guide 35 having a through hole is provided. A second float 34 is accommodated in the space of the second guide 35, and the second float 34 moves up and down in the second guide 35. That is, when the amount of the suction object X in the suction bottle 3 increases, the suction object X flows into the space of the second guide 35 and the liquid level rises, along with the liquid level of the suction object X, along the second guide 35. As a result, the second float 34 rises, and the upper end surface of the second float 34 abuts on the connection port 12a to close the connection port 12a. That is, the second float 34 rises together with the liquid level of the aspirate X accumulated in the suction bottle 3, and when the second float 34 rises to a predetermined height, the connection port with the suction conduit 12 located on the suction pump 2 side. It functions to block 12a (blocking float).

  A control unit 8 that controls the operation of the suction pump 2 and the electromagnetic valve 5 described above is provided inside the main body unit 10. As shown in FIG. 3, a sensor detection unit 81, a pump control unit 82, and an electromagnetic valve control unit 83 are constructed in the control unit 8 by incorporating a predetermined program. The sensor detection unit 81 acquires a detection result detected by the magnetic sensor 90 via the signal line 91. That is, when the magnetic sensor 90 detects that the first float 31 has risen and the magnetic force of the magnet 32 of the first float 31 has reached a predetermined strength, information to that effect is obtained, and the pump control unit 82 and the electromagnetic Notify the valve control unit 83 (suction stop control means). Receiving this, the pump control unit 82 issues a stop command to the suction pump 2 via the signal line 21. At the same time, the electromagnetic valve control unit 83 issues a command to open the valve to the electromagnetic valve 5 via the signal line 51. As a result, the suction operation is stopped and the electromagnetic valve 5 is opened. The control may be realized by an electric circuit equipped with a device such as a relay that operates as described above.

[Operation]
Next, the operation of the suction device having the above configuration will be described with reference to FIGS. FIG. 4 is an explanatory diagram showing the suction operation, and FIG. 5 is an explanatory diagram showing the operation when the suction is stopped. FIG. 6 is a flowchart showing the operation of the suction device.

  First, when starting suction, the operator presses a power button, a suction start button, or the like (step S1), a suction start command is issued from the control unit 8 to the suction pump 2, and the suction pump 2 is activated. (Step S2). At this time, it is assumed that the electromagnetic valve 5 is closed at the end of the previous suction, as will be described later. Then, as shown in FIG. 4, the suction force from the suction pump 2 is urged to the suction pipes 11, 12, and 13 through the safety bottle 4 and the suction bottle 3 and sucked into the suction port 11 a that is one end side thereof. A force is generated (arrows A1, A2, A3). The sucked gas is exhausted from the suction pump 2 through the suction pipe 14 (arrow A4).

  When the operator brings the suction port 11a close to the suction target, the suction product is sucked from the suction port 11a (arrow B1), and this suction material passes through the suction pipe 11 and accumulates in the suction bottle 3 from the connection port 11b. (Arrow B2). Then, the amount of the sucked material X in the suction bottle 3 gradually increases, and the liquid level of the stored sucked material X gradually increases (arrow B3). As the liquid level rises, the height of the first float 31 floating on the suction X increases (arrow B4), and the second float 34 also rises (arrow B5).

  Thereafter, when the amount of the sucked material X in the suction bottle 3 further increases and the liquid level rises, the first float 31 and the second float 34 are placed on the lid 30 of the suction bottle 3 as shown in FIG. Abut or close. Then, the magnetic force generated from the magnet 32 provided at the upper end of the first float 31 is detected by the magnetic sensor 90 (arrow C1), and notified by the control unit 8 via the signal line 91 (arrow). C2, C2 ′). The control unit 8 that has detected this (step S3: YES) issues a stop command to the suction pump 2 via the signal line 21 (arrows C3 and C3 ′), and issues a command to open the valve to the electromagnetic valve 5. (Arrows C4 and C4 ') (step S4).

  From the above, when the amount of the sucked material X reaches a certain amount, this is automatically detected, the suction operation is stopped, the electromagnetic valve 5 is opened, the suction pipes 11, 12, 13 and the suction bottles 3, The safety bottle 4 is opened to the outside air. As a result, the suction pipes 11, 12, 13 and the suction bottle 3 can be prevented from remaining in a negative pressure state, and suction from the suction port 11a is reliably stopped and accumulated in the suction bottle 3. It is possible to prevent the sucked material X from flowing into the suction pump 2 side. Therefore, it is possible to improve the reliability of the apparatus and improve the convenience for the user. Since the amount of the attracted substance X can be detected with a simple configuration such as using the first float 31, the magnet 32, and the magnetic sensor 90 as described above, the assembly of the apparatus is facilitated and speeded up. Cost reduction can be achieved.

  Further, as the liquid level of the aspirate X in the suction bottle 3 rises, the second float 34 also rises and closes the connection port 12a between the suction bottle 3 and the suction conduit 12 located on the suction pump 2 side. Thereby, it can suppress more reliably that the suction | inhalation thing X flows in into a suction pump from the suction bottle 3, and can aim at the further improvement of the reliability of an apparatus.

  As described above, after the suction pump 2 is stopped, the operator turns off the power of the suction device (step S5), and the electromagnetic valve 5 is closed (step S6) to prepare for the next suction.

  Here, the case where the magnet embedded in the first float 31 and the magnetic sensor are used as the means for detecting the amount of the attracted substance X accumulated in the suction bottle 3 has been exemplified. Any configuration may be used as long as it detects the height of the liquid level and the accumulated amount of the sucked material X. However, as described above, by using a magnetic sensor, it is possible to detect non-contact electrically, so that it is possible to prevent the occurrence of inconveniences such as electric shock and to improve the reliability of the apparatus. .

  The suction device according to the present invention can be used as a medical suction device for sucking body fluids such as blood and sputum from a patient's human body at the time of surgery, examination, treatment, or other purposes. And has industrial applicability.

It is an external view which shows the structure of a suction device. It is a block diagram which shows the structure of a suction device. It is a functional block diagram which shows the structure of the control part disclosed in FIG. It is explanatory drawing which shows operation | movement of a suction device, and is a figure which shows the operation | movement at the time of suction. It is explanatory drawing which shows operation | movement of a suction device, and is a figure which shows operation | movement at the time of a suction stop. It is a flowchart which shows operation | movement of a suction device.

Explanation of symbols

11, 12, 13, 14 Suction line 11a Suction port 11b, 12a Connecting port 2 Suction pump 3 Suction bottle 30 Lid 31 First float 32 Magnet 33 Guide 34 Second float 35 Second guide 4 Safety bottle 5 Solenoid valve 6 Pressure adjusting valve 7 Vacuum gauge 8 Control unit 81 Sensor detection unit 82 Pump control unit 83 Electromagnetic valve control unit 9 Suction bottle holding unit 90 Magnetic sensor

Claims (7)

A suction pipe having a suction port formed at one end thereof, a suction pump for biasing the suction force to the suction pipe, a container provided on the suction pipe for storing aspirated material sucked from the suction port, and An open valve that opens the container and the suction pump to the outside air, an aspirant amount measuring means that measures the amount of aspirated material accumulated in the container, and the suction according to a measurement result by the aspirated substance amount measuring means A suction stop control means for controlling the pump to stop the suction operation and to open the release valve;
A suction device comprising: The aspirating material amount measuring means includes a rising means that rises together with the liquid level of the aspirating material accumulated in the container, and an ascending measurement that measures the amount of the aspirating material in the container by measuring the rising state of the rising means. Means, and
The suction device according to claim 1. The ascending means is a float that floats near the liquid level of the aspirated material accumulated in the container,
The rise measuring means is a float position measuring means for measuring the amount of aspirated material in the container by detecting the height of the float.
The suction device according to claim 2. While providing a magnetic force generating means in the float,
The float position measuring means detects the magnetic force from the magnetic force generating means provided in the float and detects the height of the float according to the detection result;
The suction device according to claim 3. The float and the float position measuring means are provided so as to be positioned substantially on the center line along the height direction of the container.
The suction device according to claim 4. A closed float that rises together with the liquid level of the suction material accumulated in the container and closes the connection port between the container located on the suction pump side and the suction pipe when the container rises to a predetermined height. Provided,
The suction device according to claim 1, 2, 3, 4 or 5. A suction pipe having a suction port formed at one end thereof, a suction pump for biasing the suction force to the suction pipe, a container provided on the suction pipe for storing aspirated material sucked from the suction port, and An opening valve that opens the space between the container and the suction pump to the outside air,
Measure the amount of aspirated material accumulated in the container, and control to stop the suction operation of the suction pump and open the open valve according to the measurement result,
A method for controlling a suction device.