JPS62224360A - Auxiliary circulation machinery driving apparatus - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention is designed to inflate and inflate auxiliary circulation equipment such as an artificial heart pump or an intra-aortic balloon pump by alternately supplying positive pressure and negative pressure. The present invention relates to a drive device for auxiliary circulation equipment that deflates an intra-aortic balloon pump, and particularly to a drive device that drives an intra-aortic balloon pump.

(Prior Art) These drive devices include a compressor as a positive pressure generating device and a vacuum pump as a negative pressure generating device, and expand/deflate the auxiliary circulation equipment by switching the generated pressures.

An example of this is shown in Japanese Patent Laid-Open No. 103466/1983.

(Problems to be Solved by the Invention) However, the repeated expansion and contraction of the auxiliary circulation device consumes a large amount of positive pressure and negative pressure. In addition, a compressor and vacuum pump of capacity to satisfy the maximum positive and negative pressure loads (ie, pressure x flow M) are required. Therefore, a relatively large compressor and vacuum pump have to be used, and the drive device itself has to be quite large.

Therefore, an object of the present invention is to reduce the size of the drive device by reducing the size of pressure generating devices such as compressors and vacuum pumps.

[Structure of the invention]

(Means for Solving the Problems) To this end, the present invention provides a positive pressure generating means for generating positive pressure, and a positive pressure regulating means for regulating the pressure generated by the positive pressure generating means to a predetermined positive pressure value. , negative pressure generating means for generating negative pressure, negative pressure regulating means for regulating the pressure generated by the negative pressure generating means to a predetermined negative pressure value, and connected to the positive pressure regulating means and the negative pressure regulating means. ,
a switching valve means for outputting both, a first valve means for communicating the negative pressure generating means and the negative pressure regulating means with the atmosphere, and an atmospheric inlet of the positive pressure generating means and an atmospheric discharge of the negative pressure generating means. A connecting means for communicating with the outlet, an on-off valve means for communicating the connecting means with the atmosphere, and a switching valve means are operated to switch at a predetermined timing, and the switching valve means is operated to the positive pressure regulating means side. electronic control means for opening the first valve means and closing the opening/closing valve means in the above state.

(Function) According to this, when the switching valve means is operated to the positive pressure regulating means side, positive pressure is consumed. This positive pressure consumption is compensated for by the positive pressure generating means. At this time, the first valve means is opened to communicate the negative pressure generating means and the negative pressure regulating means with the atmosphere, and the on-off valve means is closed to connect the inlet of the positive pressure generating means and the negative pressure generating means. Connect the discharge ports. This results in
Atmospheric air discharged from the outlet of the negative pressure generating means can be supplied to the inlet of the positive pressure generating means. That is, the negative pressure generating means that normally generates negative pressure can be used as the positive pressure generating means.

Therefore, the ability of the positive pressure generating means can be supplemented by the negative pressure generating means. Therefore, the capacity of the positive pressure generating means can be increased and its size can be reduced.

The present invention further includes negative pressure detection means for detecting the pressure between the negative pressure regulating means and the switching valve means, and when the detected pressure of the negative pressure detection means is below a predetermined negative pressure value, the first The valve means and the opening/closing valve means are operated.

This allows the negative pressure generating means to assist the positive pressure generating means in a state where negative pressure is ensured.

Furthermore, the present invention includes a second valve means for communicating the pressure generating means and the positive pressure regulating means with the atmosphere, and the switching valve means is operated to the negative pressure regulating means side by the electronic control means. In this state, the second valve means is opened and the on-off valve means is closed. According to this, when the switching valve means is operated to the negative pressure regulating means side, negative pressure is consumed. At this time, the second valve means is opened to communicate the positive pressure generating means and the positive pressure regulating means with the atmosphere, and the on-off valve means is closed to connect the inlet of the positive pressure generating means and the negative pressure generating means. Connect the discharge ports. Thereby, the discharge port of the negative pressure generating means can be suctioned by the positive pressure generating means.

That is, the positive pressure generating means can be used as the negative pressure generating means.

Therefore, the ability of the negative pressure generating means can be supplemented by the positive pressure generating means. Therefore, its size can be further reduced.

Also at this time, a positive pressure detecting means is provided for detecting the pressure between the positive pressure regulating means and the switching valve means, and when the detected pressure of the positive pressure detecting means is equal to or higher than a predetermined positive pressure value, the second valve means and actuating the on-off valve means.

This allows the positive pressure generating means to assist the negative pressure generating means in a state where positive pressure is ensured.

The auxiliary circulation device drive device is required to increase the expansion and contraction speed of the auxiliary circulation device.

For this purpose, it is desirable that the rise (fall) of the pressure supplied to the auxiliary circulation equipment be steep.

Therefore, in the present invention, an input chamber and an output chamber are formed by a movable diaphragm, and isolator means in which the input chamber is connected to the switching valve means, and a third valve means and isolator means connected to the output chamber of the isolator means. The electronic control means operates the switching valve means to the positive pressure regulating means side to open the third valve means, and the movable diaphragm moves to the first position. 3rd when moved to position
With the third valve means closed and the switching valve means operated toward the negative pressure regulating means side, and with the switching valve means operated toward the negative pressure regulating means side and the third valve means opened, the movable diaphragm is When moved to the second position, the third valve means is closed and the switching valve means is operated to the positive pressure regulating means side.

According to this, when the moving diaphragm moves to a predetermined position,
By closing the third valve means, the pressure within the auxiliary circulation device is maintained constant. Then, the switching valve means is switched to a different pressure supply side. Therefore, the input chamber of the isolator means can be communicated with the pressure supply side while maintaining the expansion or contraction of the auxiliary circulation device. Therefore, pressure can be supplied to the input chamber of the isolator means before the third valve means is then opened to switch the state of the auxiliary circulation equipment. Therefore, the state of the auxiliary circulation device can be quickly switched. In addition, also in this case, the negative pressure generating means can be used as an auxiliary to the positive pressure generating means, and conversely, the positive pressure generating means can be used as an auxiliary to the negative pressure generating means.

(Example) An example of the present invention will be described below based on the drawings. FIG. 1 shows a block diagram of the auxiliary circulation equipment drive device. The output of the compressor 10, which is a positive pressure generating means, is connected to a positive pressure regulating valve 11, which is a positive pressure regulating means, and the output of the pressure regulating valve 11 is connected to a tank 12. A pressure sensor 13 serving as positive pressure detection means is disposed in the tank 12 .

The output of the tank 12 is connected to a solenoid valve 14 which is a switching valve means. The output of the solenoid valve 4 is connected to an isolator 20 which is an isolator means. This isolator 20 converts the driving medium of the auxiliary circulation device from air to a gas such as helium. This makes the driving medium safe for living organisms.

Here, details of the isolator 20 are shown in FIG. 2. Second
In the figure, the isolator 20 is a diaphragm 23 sandwiched between housings 21 and 22, and an input chamber 2
4 and an output chamber 25. Diaphragm 2
Plates 26 and 27 are attached to both sides of the central portion of 3. This diaphragm 23 and plates 26 and 27 form a moving diaphragm. A regulating member 28 for regulating the amount of movement of the plate 26 is attached to the center of the housing 21 . The regulating member 28 is the screw 2
It is screwed into the housing 21 by 8a. When the regulating member 28 is rotated, the regulating member 28 moves from side to side in the drawing. Moving to the left increases the range of movement of plates 26 and 27; moving to the right increases the range of movement of plates 26 and 27.
The movement range of and 27 becomes smaller.

Further, a pressure sensor 29 serving as pressure detection means is disposed on the input chamber 24 side of the housing 21 . On the output chamber 25 side of the housing 22, a Hall element sensor 30, which is a position detection means for detecting the moving positions of the plates 26 and 27, is arranged. A magnet 31 is disposed on the plate 27 at a position facing the Hall element sensor 30. The Hall element sensor 30 can detect the position of the plate 27 because it can obtain an output proportional to the external magnetic field.

Referring again to FIG. Output chamber 25 of isolator 20
is connected to the helium gas supply/discharge mechanism 32 and a solenoid valve 50 which is a third valve means.

The output of the electromagnetic valve 50 is connected to an intra-aortic balloon pump 33, which is an auxiliary circulation device. This -1 lium gas supply/discharge mechanism 32 maintains the helium gas in the isolator 20 and the balloon pump 33 at a constant level.

Further, the discharge port 10a of the compressor 10 can communicate with the atmosphere through a solenoid valve 60, which is a second valve means.

Next, the output of the negative pressure pump 40, which is a negative pressure generating means, is connected to a negative pressure regulating valve 41, which is a negative pressure regulating means.
The output of is connected to tank 42. A pressure sensor 43, which is negative pressure detection means, is provided in the tank 42.

The output of the tank 42 is connected to a solenoid valve 44 which is a switching valve means. The output of the solenoid valve 44 is the isolator 2
0 input chamber 24.

The suction port 40a of the negative pressure pump 40 can communicate with the atmosphere through a solenoid valve 61, which is a first valve means.

The suction port 10b of the compressor 10 and the discharge port 40b of the negative pressure pump 40 are connected by a conduit 62, which is a connecting means. A solenoid valve 63, which is an on-off valve means, which allows the pipe line 62 to communicate with the atmosphere is connected to the pipe line 62.

Pressure sensors 13 and 43 . A pressure sensor 29 and a Hall element sensor 30 are connected to the output, and pressure regulating valves 11 and 41 . and solenoid valves 14, 44, 50, 6
0.61 and 63 are connected.

Next, the operation of the microcomputer 70 is performed in steps 3 and 4.
5. 6. 7. 8. 9. This will be explained based on the flowcharts shown in FIGS. 10 and 11.

3 and 4 show the main control. In step SIO, it is determined whether the balloon pump 33 is in the systolic phase. To determine the systolic phase of the balloon pump 33, for example, an electrocardiogram signal (ECG) and/or blood pressure signal of the living body is input into the microcomputer 70 from the outside, and based on this, the systolic and diastolic phases appropriate for the state of the living body are determined. is calculating the timing of This calculation and the like will be omitted here.

If it is determined in step S10 that the balloon pump 33 is in the expansion phase, positive pressure supply control shown in steps Sll and subsequent steps is performed. Positive pressure supply control first starts with step Sl.
At step 1, it is determined whether the moving diaphragm position flag is "01" or not. This moving diaphragm position flag is determined by the plate 2 detected by the Hall element sensor 30 in the next step S12.
7 position ST raeas is the predetermined setting position S at the time of inflation.
When T set 1 is reached, “01” is entered in step 313.
"This flag is set. In this state, "01"
Not flagged. Therefore, the process proceeds to step S14, where the solenoid valve 50 is opened to communicate the output chamber 25 with the balloon pump 33. Here, as will be described later, the input chamber 24 of the isolator means 20 has already opened the solenoid valve 14,
It is communicated with the tank 12 with the solenoid valve 44 closed. That is, the input chamber 24 is supplied with positive pressure and is in a pressurized state. Therefore, when the electromagnetic valve 50 is opened, the plate 27 immediately moves in the direction of inflating the balloon pump 33 and starts inflating the balloon pump 33. Note that steps S15 and S16 are steps for keeping these electromagnetic valves 14 open and the electromagnetic valve 44 closed.

At this time, the positive pressure regulation control Adj shown in step 320
Do Pi. This is shown in the flowchart of FIG. In FIG. 5, in step S21, the tank pressure Pme indicated by the detected value of the pressure sensor 13 arranged in the tank 12 is
It is determined whether or not as is greater than or equal to the positive pressure set value Plset. If the pressure Pmeas is less than the positive pressure set value Plset, the pressure regulating valve 11 is opened and the pressure of the compressor 10 is introduced into the tank 12 in step S22. When the pressure Pmeas reaches the positive pressure set value P1set, the pressure regulating valve 11 is closed in step S23.

Returning to FIG. 3 again, next, the negative pressure regulation control Adj V2 of step S40 is performed. This is balloon pump 3
3 is in the expansion phase due to positive pressure, the negative pressure necessary for the next contraction phase is set in the tank 42.

This will be explained using the flowchart shown in FIG. In FIG. 6, in step 341, the tank pressure Vmea indicated by the detected value of the pressure sensor 43 disposed in the tank 42 is
It is determined whether or not s is less than or equal to the negative pressure set value V2set. If the pressure Vmeas is greater than the negative pressure set value V2set, the pressure regulating valve 41 is opened and the pressure of the negative pressure pump 40 is introduced into the tank 42 in step S42. Pressure Vme
When as reaches the negative pressure set value V2set, step S
At step 43, the pressure regulating valve 41 is closed.

Returning to FIG. 3 again, other processing is performed in step S50, and the process proceeds to step 352. Step S52
Then, the tank pressure Vmeas indicated by the detected value of the pressure sensor 43 arranged in the tank 42 is the negative pressure set value V2set.
Determine whether the following is true. If the pressure Vmeas is less than or equal to the negative pressure set value V2set, positive pressure auxiliary control As5tP is performed in step S70.

If not, the negative pressure in the tank 42 has not yet reached the negative pressure set value, so normal control As5tO (step 570) is performed without assisting the pressure generating means.

Here, FIG. 9 shows the flow of the positive pressure auxiliary control As5tP. In FIG. 9, by closing the solenoid valve 60,
By operating the compressor 10 as a positive pressure generating means and opening the solenoid valve 61, the vacuum pump 40 is used for this assistance. At this time, in step S73, the solenoid valve 63 is closed to connect the suction port 10b of the compressor 10 and the discharge port 40b of the vacuum pump 40.

FIG. 10 shows the flow of normal control As5tO.

In the case of normal control, the solenoid valves 60 and 61 are both closed, the solenoid valve 62 is opened, and the compressor 10 and vacuum pump 40 are operated independently. After these controls, return.

Next, in step S12, the position ST of the plate 27
When it is determined that meas has reached the predetermined inflation setting position ST set 1, the process proceeds to step S13.

In step S13, the 101" flag is set and the process proceeds to step S17. In step S17, the solenoid valve 50 is closed to cut off the subsequent positive pressure supply. As a result, the pressure of the balloon pump 33 is maintained and the balloon pump 33 is in an expanded state. is retained.

Then, in step 318, the solenoid valve 14 is closed to cut off the supply of positive pressure to the input chamber 24. In step 519,
The solenoid valve 44 is opened to supply negative pressure to the input chamber 24. This is a step for supplying negative pressure to the input chamber 24 in preparation for the next contraction period while the balloon pump 33 maintains its expansion. Therefore, while the balloon pump 33 is maintained inflated, the input chamber 24 is pressurized to a negative pressure state.

Note that after these processes, in step 330, the pressure value in the tank 12 is set to a set pressure P2 set in preparation for the next expansion period. This is a control for setting the positive pressure necessary for the next expansion period in the tank 12 while the balloon pump 33 is kept inflated. This will be explained using the flowchart shown in FIG.

In FIG. 7, in step S31, the tank pressure Vme indicated by the detected value of the pressure sensor 13 arranged in the tank 12 is
It is determined whether or not as is greater than or equal to the positive pressure set value P2set. If the pressure Pmeas is less than the positive pressure set value P2set, the pressure regulating valve 11 is opened and the pressure of the compressor 10 is introduced into the tank 12 in step S32. Pressure Pm
When eas reaches the positive pressure set value P2set, step S
At step 33, the pressure regulating valve 11 is closed.

Furthermore, in step 5140, the negative pressure in the tank 42 is set to a predetermined negative pressure set value V2 set. This is the same control as in step S40 described above.

After this, other processing is performed in step S51, and the process advances to step S53. In step S53, the tank pressure Pmea indicated by the detection value of the pressure sensor 13 arranged in the tank 12 is
It is determined whether or not s is equal to or greater than a positive pressure set value P2set. If the pressure r'meas is greater than or equal to the positive pressure set value P2se, in step 390, the negative pressure auxiliary control As5t is activated.
Do N. If not, the positive pressure in the tank 12 has not yet reached the positive pressure set value, so the normal control As5tO (step 318
0).

Here, FIG. il1 shows the flow of the negative pressure auxiliary control As5tN. In FIG. 11, by closing the solenoid valve 61, the vacuum pump 40 is operated as a negative pressure generating means, and by opening the solenoid valve 60, the compressor 10 is used for this assistance. At this time, in step S93, the solenoid valve 63
is closed, and the suction port 10b of the compressor 10 and the discharge port 40b of the vacuum pump 40 are connected.

The normal control ^5stO of step 5180 is as described above.
This is the same as the control in step S80.

Next, control of the systolic phase will be explained with reference to FIG.

If it is determined in step S10 that the balloon pump 33 is in the systolic phase, negative pressure supply control shown in steps 361 and subsequent steps is performed. Negative pressure supply control first begins in step S6.
1, it is determined whether the moving diaphragm position flag is "00". This moving diaphragm position flag is determined by the plate 2 detected by the Hall element sensor 30 in the next step S62.
7 position ST meas is the predetermined setting position ST at the time of contraction.
When set O is reached, "00" is set in step S63.
It's something that raises a flag. Therefore, in this state,”
Since the 00'' flag is not set, the process proceeds to step S64. In step S64, the solenoid valve 50 is opened to communicate the output chamber 25 with the balloon pump 33. Here,
As mentioned above, the input chamber 24 of the isolator means 20 is
With the solenoid valve 44 already open and the solenoid valve 14 closed, the tank 12
is communicated with.

That is, the input chamber 24 is supplied with negative pressure and is in a pressurized state. Therefore, when the electromagnetic valve 50 is opened, the plate 27 immediately moves in the direction of deflating the balloon pump 33 and starts deflating the balloon pump 33. Note that steps S65 and S66 are steps for keeping the solenoid valves 14 closed and the solenoid valves 44 open.

At this time, the negative pressure regulation control Ad shown in step 5100
j Perform Vl. This is shown in the flowchart of FIG. In FIG. 8, in step S71, the tank 42
The tank pressure V indicated by the detection value of the pressure sensor 43 arranged at
It is determined whether meas is less than or equal to the negative pressure set value Vl set. Pressure Vmeas is negative pressure set value Vlset
If it is larger, the pressure regulating valve 41 is opened and the pressure of the negative pressure pump 40 is introduced into the tank 42 in step 5IO3.

When the pressure Vmeas reaches the negative pressure set value Vlset, the pressure regulating valve 41 is closed in step 5103.

Returning to FIG. 4 again, in step 5130,
In preparation for the next expansion period, the pressure value in the tank 12 is set to a set pressure P2set. This is a control for setting the positive pressure necessary for the next expansion period in the tank 12 while the balloon pump 33 is being deflated. Since this is the same as the control of the positive pressure regulation control Adj P2 shown in FIG. 7, the explanation will be omitted.

Returning again to FIG. 4, in step S54, other processing is performed, and in step S56, the tank pressure Pmea indicated by the detected value of the pressure sensor 13 disposed in the tank 12 is determined.
It is determined whether or not s is greater than or equal to the positive pressure set value P2se. If the pressure Pmeas is equal to or higher than the positive pressure set value P2set, in step 5190, the negative pressure auxiliary control As5t is activated.
Do N. If this is not the case, since the positive pressure in the tank 12 has not yet reached the positive pressure set value, normal control As5tO is performed without assisting the pressure generating means.

Here, in step 5190 negative pressure auxiliary control Ass tN
is the same as the control in step S90 described above.

Further, the normal control As5tO in step 8280 is the same as the control in step S80 described above.

After these controls, return.

Next, in step S62, the position ST of the plate 27 is
When it is determined that meas has reached the predetermined contraction position ST set O, the process proceeds to step S63.

In step S64, the '00'' flag is set and the process proceeds to step S67. In step S67, the solenoid valve 50 is closed to cut off the subsequent negative pressure supply. As a result, the pressure of the balloon pump 33 is maintained and the balloon pump 33 is deflated. maintained in the state.

Then, in step 368, the solenoid valve 14 is opened to supply positive pressure to the input chamber 24. In step S69, the solenoid valve 4
4 is closed to cut off the supply of negative pressure to the input chamber 24. This is a step for supplying positive pressure to the input chamber 24 in preparation for the next expansion period while the balloon pump 33 maintains its deflation. Therefore, while the balloon pump 33 is maintained deflated, the input chamber 24 is pressurized to a positive pressure state.

Note that after these processes, negative pressure regulation control Adj V2 of step 5240 is performed. This is a control for setting the negative pressure necessary for the next contraction period in the tank 42 while the balloon pump 33 is maintained in a contracted state by negative pressure. Since this is the same control as explained in the flowchart shown in FIG. 5, the explanation will be omitted.

After this, other processing is performed and the process advances to step S57.

In step S57, it is determined whether the tank pressure Vmeas indicated by the detected value of the pressure sensor 43 disposed in the tank 42 is less than or equal to the negative pressure set value V2set. Pressure Vm
If eas is less than the negative pressure set value V2se, positive pressure auxiliary control Ass tP is performed in step 5170. If not, the negative pressure in the tank 42 has not yet reached the negative pressure set value, so the pressure generating means is not assisted;
Perform normal control As5tO.

Here, in step 5170, the positive pressure auxiliary control Ass tP
is the same as step S70 described above. Further, the normal control As5tO in step 8380 is the same as in step S80 described above.

After these controls, return.

Next, FIG. 12 shows a timing chart of the opening and closing states of each electromagnetic valve. Hereby, the operation of this embodiment will be summarized.

(i) Expansion period of the balloon pump 33: (1) First, when switching to expansion, the solenoid valve 50 is closed and the balloon pump 33 is held in a deflated state. At this time, the solenoid valve 14 is open and the solenoid valve 44 is closed. Therefore, the pressure in the input chamber 24 is equal to the positive pressure setting value P25et (for example, 300 miiHg) set by the solenoid valve 11.
is set to . In this state, when the solenoid valve 50 is opened, the plate 27 moves in the direction of inflating the balloon pump 33. At this time, in order to prevent too high pressure from being applied inside the balloon pump 33, the pressure in the input chamber 24 is set to a positive pressure setting value of 1'l set (for example, 180 m
+mHg).

At this time, both the solenoid valves 60 and 61 are open, and both the compressor 10 and the vacuum pump 40 are connected to the tank 11.4.
It is in a state where it is separated from 1.

■When the balloon pump 33 is fully inflated, that is, when the plate 27 reaches the predetermined inflation position ST5etl,
The solenoid valve 50 is closed to maintain the expansion of the balloon pump 33 and wait until the timing for deflation is reached.

Then, the solenoid valve 14 is closed and the solenoid valve 44 is opened, and the pressure in the input chamber 24 is set to the pressure value V2 required at the beginning of the next systole.
5et (for example, set to -150 Tsuru (1g)).

At the same time, the pressure in the positive pressure tank 12, which has already been shut off by the solenoid valve 14, is set to a pressure value P2 set required at the beginning of the next expansion period.

At this time, both positive pressure and negative pressure are consumed. Therefore, both the solenoid valves 60 and 61 are closed, and the solenoid valve 63 is opened to operate the compressor 10. The vacuum pump 40 is operated independently.

When the pressure within the tank 42 reaches the negative pressure value V2set, positive pressure assistance is performed by closing the solenoid valve 60, opening the solenoid valve 61, and closing the solenoid valve 63. This positive pressure assistance is provided by tank 12
This continues until the internal pressure reaches the positive pressure set value P2 set. After that, both the solenoid valves 60 and 61 are opened to wait until the next state.

(ii) Contraction phase of the balloon pump 33: ■ First, when switching to contraction, the solenoid valve 50 is closed and the balloon pump 33 is held in an expanded state. At this time, the solenoid valve 14 is closed and the solenoid valve 44 is open. Therefore, the input chamber 24
The pressure is the negative pressure setting value V2 set by the solenoid valve 41.
5et (for example, 150 mmmm1l). In this state, when the solenoid valve 50 is opened, the plate 27 moves in the direction of deflating the balloon pump 33.

At this time, in order to prevent excessive pressure from being applied inside the balloon pump 33, the pressure in the input chamber 24 is reduced to the negative pressure set value V.
l set (for example, -'lQs*Hg).

■When the balloon pump 33 is sufficiently deflated, that is, when the plate 27 reaches the predetermined deflated position ST5etO,
The solenoid valve 50 is closed to maintain the contraction of the balloon pump 33, and wait until the timing for inflation is reached.

Then, the solenoid valve 14 is opened, the solenoid valve 44 is closed, and the pressure in the input chamber 24 is set to the pressure value P2 required at the beginning of the next expansion period.
5et (for example, set to 300 mmmm1l).

At the same time, the pressure in the negative pressure tank 42, which has already been shut off by the solenoid valve 44, is set to the pressure value V2 set required at the beginning of the next systole.

At this time, both positive pressure and negative pressure are consumed. Therefore, both the solenoid valves 60 and 61 are closed, and the solenoid valve 63 is opened to operate the compressor 10. The vacuum pump 40 is operated independently.

Then, the pressure inside the tank 12 becomes a positive pressure value P2 set
When reaching , solenoid valve 60 opens, solenoid valve 61 closes, solenoid valve 63
Closed to provide negative pressure support. This negative pressure assistance is provided by tank 4
The process continues until the pressure inside 2 reaches the negative pressure set value V2set. After that, both the solenoid valves 60 and 61 are opened to wait until the next state.

Note that each pressure auxiliary state is shown in FIG. 12.

Here, compressor 10. Vacuum pump 40 is tank 1
The state where the compressor 10.2.42 is disconnected is indicated by a "-"; The state in which the vacuum pump 40 is acting independently is indicated by "0", the positive pressure auxiliary state is indicated by rPJ, and the negative pressure assisted state is indicated by rNJ.

As described above, in this embodiment, the input chamber of the isolator means can be communicated with the negative pressure source while maintaining the expansion of the auxiliary circulation device. Therefore, when the valve means is next opened to supply negative pressure to the auxiliary circulation equipment, negative pressure has already been supplied to the input chamber of the isolator means. Therefore, by preventing the influence of the resistance of the conduit from the negative pressure source to the isolator means and by applying pressurization to the input chamber of the isolator means in advance, it is possible to quickly switch the auxiliary circulation device from expansion to contraction.

Further, during the contraction period of the auxiliary circulation device, the input chamber of the isolator means can be communicated with the positive pressure source while the auxiliary circulation device is maintained in contraction. Therefore, when the valve means is next opened to supply positive pressure to the auxiliary circulation equipment, positive pressure is supplied to the input chamber of the isolator means. Therefore, the influence of conduit resistance from the positive pressure source to the isolator means is prevented, and
By prepressurizing the input chamber of the isolator means, the switching from deflation to expansion of the auxiliary circulation device can be made faster.

〔Effect of the invention〕

According to the present invention, the positive pressure generating means can be assisted by the negative pressure generating means. Therefore, the positive pressure generating means can be made smaller.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the auxiliary circulation device drive device of the present invention, FIG. 2 is a sectional view showing the isolator means of FIG. 1, and FIG. 4. 5. 6. 7.8, 9.1
0 and 11 are flowcharts showing the operation of the embodiment,
FIG. 12 is a timing chart showing the operation of the embodiment. 10... Compressor (positive pressure generation means), 11...
Pressure regulating valve (positive pressure regulating means), 12... Link (positive pressure regulating means), 13... Pressure sensor (positive pressure regulating means, positive pressure detecting means), 14... Solenoid valve ( switching valve means), 20.
...Isolator (isolator means), 24...Input chamber, 25...Output chamber, 23...Diaphragm (moving diaphragm), 26.27...Plate (moving diaphragm), 2
9... Pressure sensor (pressure detection means), 30... Hall element sensor (position detection means), 31... Magnet (position detection means), 40... Negative pressure pump (negative pressure generation means),
41... Pressure regulating valve (negative pressure regulating means), 42... Tank (negative pressure regulating means), 43... Pressure sensor (negative pressure regulating means, negative pressure detecting means), 44... Solenoid valve (switching valve means), 50... solenoid valve (third valve means), 60... solenoid valve (second valve means), 61... solenoid valve (first valve means), 62... Pipe line (connection means), 63... Solenoid valve (open/close valve means), 70... Microcomputer (electronic control means) Fig. 2 Fig. 9 Fig. 10 Fig. 11 Fig. 12111

Claims (5)

[Claims] (1) a positive pressure generating means that generates positive pressure; a positive pressure regulating means that regulates the pressure generated by the positive pressure generating means to a predetermined positive pressure value;
A negative pressure generating means for generating negative pressure, a negative pressure regulating means for regulating the pressure generated by the negative pressure generating means to a predetermined negative pressure value, and a negative pressure regulating means connected to the positive pressure regulating means and the negative pressure regulating means. , a switching valve means for outputting both, a first valve means for communicating the negative pressure generating means and the negative pressure regulating means with the atmosphere, and an atmosphere inlet of the positive pressure generating means and the negative pressure. A connecting means for communicating with the atmospheric discharge port of the generating means, an on-off valve means for communicating the connecting means with the atmosphere, and switching operation of the switching valve means at a predetermined timing, An auxiliary circulation equipment drive device comprising electronic control means that opens the first valve means and closes the opening/closing valve means when the pressure regulating means is operated. (2) The negative pressure regulating means includes a negative pressure detecting means for detecting the pressure between the negative pressure regulating means and the switching valve means, and the electronic control means is configured such that the detected pressure of the negative pressure detecting means is set to the predetermined negative pressure. The auxiliary circulation equipment drive device according to claim 1, which operates the first valve means and the opening/closing valve means when the temperature is equal to or less than the above value. (3) A second valve means is provided for communicating the pressure generating means and the positive pressure regulating means with the atmosphere, and the electronic control means operates the switching valve means toward the negative pressure regulating means. 3. The auxiliary circulation equipment driving device according to claim 2, wherein the second valve means is opened and the opening/closing valve means is closed in the state where the valve is opened. (4) The positive pressure regulating means includes positive pressure detecting means for detecting the pressure between the positive pressure regulating means and the switching valve means, and the electronic control means is configured such that the detected pressure of the positive pressure detecting means is set to the predetermined positive pressure. The auxiliary circulation equipment drive device according to claim 3, which operates the second valve means and the opening/closing valve means when the value exceeds the value. (5) The switching valve means forms an input chamber and an output chamber by a movable diaphragm, and the input chamber is connected to the isolator means and the output chamber of the isolator means is connected to the input chamber. The electronic control means includes a position detection means for detecting the position of the movable diaphragm of the valve means and the isolator means, and the electronic control means operates the switching valve means toward the positive pressure regulating means to open the third valve means. In this state, when the movable diaphragm moves to the first position, the third valve means is closed and the switching valve means is operated to the negative pressure regulating means side, and the switching valve means is operated to the negative pressure regulating means side. The third
In the above-described claim, the third valve means is closed when the movable diaphragm moves to the second position with the valve means open, and the switching valve means is operated to the positive pressure regulating means side. The auxiliary circulation equipment drive device according to item 1.