JPH02275067A - Pump - Google Patents

Abstract

PURPOSE:To evaporate a fluid filled up in a pipeline and simultaneously generate these as well as to feed the fluid quietly and efficiently under pressure by setting up a lot of heating resistors along the longitudinal direction in the pipeline, and generating heat in respective heating resistors in succession. CONSTITUTION:A section U-shaped frame body 2 is tightly installed on a substrate 1 consisting of ceramics and so on, and a pipeline 3 of specified length is formed. Many heating resistors R1-R6, a common electrode 4 and many individual electrodes 5a-5f are set up on the substrate 1 in the pipeline 3 by means of printing or the like. After a fluid of water or the like is filled up in the pipeline 3, each pair of these heating resistors R1, R4; R2, R5; R3, R6 themselves are intermittently heated in succession. With this heat generation, the fluid is evaporated while pressure is generated there, whereby the fluid is successively fed under pressure in a fixed direction A along the longitudinal direction in the pipeline 3. On the other hand, energizing timing in these heating resistors R1-R6 is controlled in reverse, through which the fluid is fed to the reverse direction B under pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pump that pumps fluids such as water and oil.

[Prior art and issues] Conventionally, commonly used pumps, for example, rotate an impeller with an electric motor to give energy to the fluid.As the actuator becomes larger, it is driven by mechanical force, which causes vibration and noise. It was difficult to suppress the occurrence of

An object of the present invention is to provide a pump that has a completely new structure, can be downsized, and can suppress the generation of vibration and noise.

[Means for Solving the Problems] The present invention provides heat generating resistors arranged in the longitudinal direction of the pipe on the inner wall surface of the pipe, and sequentially energizes the heat generating resistors to generate heat. The gist of the pump is to pump fluid in a pipe by force.

[Operation] The heating resistors arranged in the longitudinal direction of the inner wall surface of the conduit are sequentially energized, so that the fluid in contact with the heating resistors is vaporized, pressure is sequentially generated, and the fluid is pumped by the pressure.

[Example] An example embodying the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, a frame body 2 having a trowel-shaped cross section is fixedly attached to a substrate 1 made of ceramic,
Both members 1 and 2 form a conduit 3 of a predetermined length.

As shown in FIG. 3, heating resistors R1-R6, a common electrode 4 and individual poles 5a-5f are disposed on the substrate 1 in the conduit 3.
is formed by printing. That is, the heating resistor R1-
R6 are arranged at predetermined intervals in the five directions of the conduit 3, and the common electrode 4 and the individual electrodes 5a to 5f are connected to the heating resistor R1 and R6. Rough 11 board 1
A drive control circuit (shown in the figure) including a control element, a driver, etc. is mounted on a part of the drive control circuit.

FIG. 4 shows a part of the drive control circuit of this pump. In the figure, heating resistors R1 and R4 are connected in parallel to a common terminal 6, and a first control terminal 8 is connected via a driver 7. Further, heating resistors R2 and R5 are connected in parallel to the common terminal 6, and a second control terminal 10 is also connected via a driver 9. Roughly speaking, heating resistors R3 and R6 are connected in parallel to the common terminal 6, and a third control pane 12 is connected via a driver 11.

Then, from each control terminal 8, 10.12, a pulse signal (control signal) SG1 having a delay time of 2"1 as shown in FIG.
``SG3 outputs 4'17, No. 3G1 to this bar sui ~
SG3 is amplified by driver 7.9.11. As a result, current flows through each heat generating resistor R1=-R6 one by one, and -R6 operates to generate heat in each heat generating resistor R1.

Next, the operation of the pump configured as described above will be explained.

First, the inlet of the conduit 3 is connected to a tank for water, oil, etc., and the inside of the conduit 3 is filled with fluid (water, oil, etc.). In this state, when the first control terminal 8 becomes high level, current flows through the heat generating resistors R1 and R4, and the heat generating resistors R1 and R4 generate heat due to dicor heat. Then, the fluid in contact with the heating resistors R1 and R4 is vaporized and pressure is generated, and this pressure causes the fluid to move in the longitudinal direction of the pipe line 3.

Next, the second control terminal 10 becomes high level at a timing deviated by the pressure propagation time τ1, so that the heating resistor R
Current flows through 2 and R5, and the heating resistors R2 and R5 generate heat due to Joule heat. Then, the fluid in contact with the heating resistors R2 and R5 is vaporized and pressure is generated, and this pressure causes the fluid to move in the longitudinal direction of the pipe line 3 (six directions in FIG. 1).

Further, the third control pane 12 goes to a high level at a timing delayed by time τ1, so that the heating resistors R3 and R
6, the heating resistors R3 and R6 generate heat due to Joule heat. Then, the fluid in contact with the heating resistors R3 and R6 is vaporized and pressure is generated, and this pressure causes the fluid to move in the longitudinal direction of the pipe line 3 (six directions in FIG. 1).

By repeating such operations, the fluid can be pumped in the Δ direction in FIG. 1.

Furthermore, by reversing the timing of energization of -R6 to each heating resistor R1, the fluid can be pumped in the direction B in FIG.

This is how this example works! , :', 8, heating resistors R1 to R6 are arranged in the longitudinal direction of the pipe 3 against the inner wall surface of the pipe 3.
At the same time, by sequentially energizing the heat generating resistors R1 to R6, the heat generating resistors R1 to R6 are prevented from generating heat, and pressure is generated to pump the fluid in the conduit. Therefore, compared to the conventional impeller type pump, the bearing diaphragm can be made smaller and more compact, and since it is not driven by mechanical force, generation of vibrations, electromagnetic noise, noise, etc. can be suppressed. In addition, fluid can be pumped in one direction (six directions or direction B in Fig. 1) without using a check valve that allows fluid movement in only one direction at the inlet and outlet portions of the conduit 3. At the same time, the fluid can be pumped in the opposite direction by adjusting the energization timing of each heating resistor R1 to R6. .

In this way, the structure is simple and has no moving parts, making it highly reliable. Furthermore, the heating resistor R1~
Since the drive control circuit is formed on a part of the ceramic substrate 1 on which R6 is printed, the pump body can be downsized and integrated.

Note that this invention is not limited to the above embodiments,
For example, as shown in FIG. 6, by arranging heat generating resistors R1-=-R6 on one inner wall surface of one conduit 3 and arranging heat generating resistors R7-R12 on the opposing inner wall surface, Fluid can be pumped more efficiently. In addition, the arrangement of the heating resistors R1 to R6 and R7 to R12 is as follows:
As shown in FIG. 7, they may be arranged offset from each other.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to reduce the size and exhibit excellent effects of suppressing imaging and noise generation.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the pump of the embodiment, Fig. 2 is a side view of the pump, Fig. 3 is a partial sectional view of the pump seen from above, and Fig. 4 is a sectional view of the pump of the embodiment.
The figure shows a part of the pump drive control circuit, Figure 5 is a time chart showing control signals, Figure 6 is a sectional view of another example of the pump, and Figure 7 is a sectional view of another example of the pump. It is. 1 is a board, 2 is a frame, 3 is a conduit, and R1-R6 are heating resistors.

Claims (1)

[Claims] 1. Heat-generating resistors are arranged in the longitudinal direction of the pipe on the inner wall surface of the pipe, and the heat-generating resistors are sequentially energized to generate heat and pump the fluid in the pipe. A pump that can be used as a pump.