JP2002045666A - Liquid mixer - Google Patents

Abstract

(57) [Problem] To provide a simple liquid mixer capable of efficiently mixing a minute amount of liquid. A mixing channel (6) is formed in an upper plate (1), and an introduction divided channel (10) is formed in a lower plate (2). Since each of the introduction divided channels 10 is formed such that the depth D of each of the introduction divided channels 10 is larger than the length L of the same introduction divided channel 10, the introduction divided channels 10 are formed. Liquid B in the mixing channel 6
When it flows into the mixing channel 6, it is uniformly diffused. As a result, in the mixing channel 6, each liquid can be evenly stacked and mixed also in the depth direction and the width direction of the channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid mixer used for mixing a minute amount of liquid in the fields of chemical analysis and chemical synthesis, and more particularly to a method for efficiently mixing minute amounts of liquid. Related to technology.

[0002]

2. Description of the Related Art In general, when liquids are mixed, the liquids to be mixed are put in a large container and mixed by stirring, or obstacles are arranged in a flow path in which the liquids to be mixed flow together. And they mix by generating Karman vortices. However, recently, for example, in the field of chemical analysis and chemical synthesis, it has become necessary to mix a small amount of liquid in order to reduce the amount of waste liquid. Attempts have been made to mix liquids [A. Manz, Proceedings
of the μTAS '98 Workshop, pp.235-240 (1988)].

As shown in the sectional view of FIG. 11, this ultra-small liquid mixer includes three plates 51 to 53 which are joined in a water-tight manner and are vertically stacked, and a central plate 52. An introduction channel 54 for flowing the liquid A on the front surface (upper surface) and a mixing channel 56 for mixing the two liquids A and B are formed, and the liquid B flows on the rear surface (lower surface). Channel 55 is formed. The through hole (nozzle) 5 in the center plate 52 is much smaller than the introduction channel 54, the introduction channel 55, and the mixing channel 56.
7, and the through-hole 57 communicates with the introduction channel 54, the introduction channel 55, and the mixing channel 56. The solution A in the introduction channel 54 and the solution B in the introduction channel 55 are laminated in the mixing channel 56 via the through-hole 57, so that the solution A and the solution B Mixing is performed.

[0004]

However, in the above-described liquid mixer, the diameter of the through-hole 57 is limited by the size of the introduction channel 5.
4, 55, and the mixing channel 56 are extremely small, so the through-hole 57 is a nozzle-type mechanism. Therefore, B
Since the liquid is blown up from the through hole 57 and mixed with the liquid A, a turbulent flow may occur at a connection point between the through hole 57 and the mixing channel 56. Therefore, in practice, the A and B liquids are not always laminated uniformly. Therefore, the present inventors have previously made Japanese Patent Application No. 2000-8359 to solve the above-mentioned problems.
No. 9 has been filed. This Japanese Patent Application No. 2000-83599 (hereinafter referred to as “improved invention” as appropriate) adopts the following configuration and brings about an action.

[0005] That is, three plates 101 to 103 are provided which are joined in a water-tight manner to each other and which are vertically stacked.
As shown in the cross-sectional view of FIG. 2, a mixing channel 104 for mixing the two liquids A and B is formed on the superposed surface of the upper plate 101 and in a direction perpendicular to the plane of FIG.
The introduction channel 10 is provided on the superposed surface of the lower plate 103.
5, and a rectifying flow channel 106 having substantially the same width as the mixing flow channel 104 is formed in the center plate 102 in the thickness direction of the plate 102. The mixing channel 104 and the introduction channel 105 are communicated via the rectifying channel 106.

When the liquid B is poured into the introduction flow path 105 while the liquid A has already flowed into the mixing flow path 104, and the liquid A and the liquid B are mixed, the liquid flows into the introduction flow path 105. Is not directly received by the mixing channel 104. Therefore, as shown in the sectional view of FIG. 12, when the liquid B flows into the introduction flow path in the direction of the arrow, the rectification flow path 106
Through the mixing channel 104. Also,
Since the width of the rectifying flow path 106 has substantially the same width as the mixing flow path 104, unlike a nozzle type liquid mixer,
No turbulence occurs. As a result, the layers can be uniformly laminated not only in the depth direction of the flow path (that is, the thickness direction of the plate) but also in the width direction of the flow path. However, the liquid mixer according to the above-described improved invention has the following problems.

Normally, a plurality of mixing channels 104, introduction channels 105, and rectification channels 106 are required to mix a plurality of types of liquids. Accordingly, more plates for forming these flow paths are required. In the liquid mixer described above, any simple structure requires at least three plates or a plate formed by complexly combining these flow paths,
The structure becomes complicated.

In view of the above circumstances, an object of the present invention is to provide a simple liquid mixer which can efficiently mix a minute amount of liquid.

[0009]

In order to solve the above problems, the present invention has the following arrangement. That is, claim 1
The liquid mixer according to the invention described in (1), includes a plurality of plates that are joined together in a watertight state with respect to each other, a mixing channel is provided on one surface of the overlapping surfaces of the plates, and the mixing channel is provided on the other surface. A liquid configured to form at least one split flow path that merges with a flow path and to inject a liquid into the split flow path to mix the liquid flowing through the mixing flow path and the liquid flowing through the split flow path. In the mixer, the depth of the groove of the divided flow path is formed to be larger than the length of the width of the same divided flow path.

[0010] The invention described in claim 2 is the same as the claim 1.
Wherein the plurality of divided flow paths are provided, and each of the divided flow paths is joined to the mixing flow path at a different merging point.

[0011]

The operation of the first aspect of the present invention will be described. The upper plate 1 comprises two plates 1 and 2 which are joined to each other in a watertight state and are stacked one above the other.
As shown in the perspective views of FIGS. 5A and 6, a mixing channel 6 is formed on the overlapping surface 1 a of the lower plate 2. Split channel 1
The operation of claim 1 will be described using a liquid mixer in which 0 is formed as an example.

The liquid B in the introduction divided flow path 10 is transferred to the mixing flow path 6 corresponding to the mixing flow path of the present invention at the connection site S between the mixing flow path 6 and the introduction divided flow path 10. It flows in and is mixed with the liquid A in the mixing channel 6. As shown in FIGS. 5A and 6, the force applied to the wall surface S ₁ of the connection portion S from the width direction of the introduction divided channel 10, that is, the shear stress, is set as the shear stress P ₁ as the introduction divided channel. 10 depth directions (ie,
The wall S ₂ receives the force connection portions S in the thickness direction) of the plate, and the pressure P _2.

Assuming that the width of the introduction divided flow path 10 is L and the depth of the introduction divided flow path 10 is D, when the width L and the depth D are changed, the above-mentioned shear stress P ₁ and pressure P ₂ are also changed. It changes accordingly. Then, the present inventors focused on the above-mentioned shear stress P ₁ and pressure P ₂ , and performed simulations while varying the width L and the depth D, respectively.

That is, the ratio of the depth D to the width L (= D /
L) Each simulation was performed while increasing the so-called aspect ratio. When the aspect ratio is less than 1, that is, when the depth D is smaller than the width L, in the case of the liquid mixer having the above-described configuration, FIG.
As shown in (a), since the pressure P ₂ has a greater effect than the shear stress P ₁ , as soon as the liquid B in the introduction divided flow channel 10 comes into contact with the wall surface S ₁ of the connection site S, As shown in the cross-sectional view of FIG. 5B, the mixing channel 6 diffuses deeply in the depth direction. The amount of the liquid B in the introduction divided flow path 10 is deeply diffused into the wall surface S ₁ of the connection portion S, and the amount of the introduction divided flow path 1
B liquid to the downstream side of the wall surface S ₁ of 0, not spread to the mixing flow path 6. Therefore, the A liquid and the B liquid are mixed unevenly in the width direction of the mixing channel 6. Furthermore, the uneven mixing in the width direction affects not only the width direction but also the depth direction.

The aspect ratio is greater than 1, ie if the depth D is greater than the width L, in the case of a liquid mixer having the above-described configuration, as shown in FIG. 6, the shear stress than the pressure P ₂ P ₁ has a greater effect. Even if the liquid B in the introduction divided flow channel 10 comes into contact with the wall surface S ₁ of the connection portion S, it does not diffuse deeply in the depth direction of the mixing flow channel 6,
Solution B from the wall surface S ₁ of the introduction split channel 10 to the downstream side,
It is uniformly diffused in the mixing channel 6. As a result, as in the liquid mixer provided with the rectifying flow channel according to the improved invention, the liquid A and the liquid B not only extend in the depth direction of the mixing flow channel 6 but also in the width direction of the mixing flow channel 6. It was confirmed from simulation that the liquid and the liquid were uniformly laminated.

As described above, the liquid mixer according to the first aspect of the present invention is formed such that the depth of the groove of the divided flow path is greater than the width of the same divided flow path. At the junction where the divided flow path joins the flow path, the shear stress received from the width direction of the divided flow path has a greater effect than the pressure received from the depth direction of the same divided flow path. Even when the liquid in the divided flow path reaches the junction, the liquid flowing through the mixed flow path and the liquid flowing through the divided flow path are not deeply diffused in the depth direction of the mixing flow path. The layers are uniformly laminated and mixed not only in the width direction but also in the width direction. In this specification, "the depth of the groove of the divided flow path is larger than the width of the same divided flow path" means "the depth of the groove of the divided flow path and the length of the width of the divided flow path." Is the same. "

According to the second aspect of the invention, since each of the divided flow paths is joined to the mixing flow path at a different junction, the number of layers of each liquid increases each time the divided flow paths merge. go. As a result, in the mixing channel, the liquids are repeatedly stacked in multiple layers in the thickness direction of the plate and become adjacent to each other in a thin layer, so that diffusion between the liquids proceeds rapidly, and each liquid is sufficiently dispersed. Will be mixed.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an appearance of a liquid mixer according to an embodiment of the present invention, FIG. 2 is a flow path diagram showing a flow path configuration in the liquid mixer of the present embodiment,
FIG. 3 is a plan view showing the superposed surface of the upper plate of the liquid mixer of the present embodiment, FIG. 4 is a plan view showing the superposed surface of the lower plate of the liquid mixer of the present embodiment, and FIG. FIG. 6 is a perspective view and a cross-sectional view for explaining the operation of the liquid mixer (when the aspect ratio, which is the ratio of the depth to the flow channel width, is less than 1). FIG. 7 is a perspective view for explaining the operation of the liquid mixer (when the ratio is greater than 1) and for explaining the liquid mixer of this embodiment, and FIG. 7 is a cross-sectional view taken along the line AB in FIGS. .

As shown in FIG. 1, the liquid mixer of this embodiment is a chip-type mixer composed of two plates 1 and 2 which are brought into close contact with each other and joined together.

In the case of this embodiment, as shown in FIG. 3, a liquid introduction port 3 for introducing the liquid A to be mixed is provided on the superposed surface 1a of the upper plate 1, A liquid inlet 4 for introducing a liquid B which is a liquid;
A liquid outlet 5 for drawing out a mixed liquid in which both the B liquids are mixed passes through the plate 1 in the thickness direction, and a mixing flow path 6 in which both the A and B liquids are fed and combined. Is formed. Further, the downstream side of the mixing channel 6 (the side from which the liquid is led out) communicates with the liquid outlet 5. The mixing channel 6 corresponds to the mixing channel in the present invention.

As shown in FIG. 4, an introduction flow path 7 having a liquid flow path for introducing the liquid A from the liquid introduction port 3 is provided on the superposed surface 2a of the lower plate 2. An introduction divided flow path 8 having respective branch flow paths for dividing the introduction flow path into a plurality (four in this embodiment) is formed. Further, an introduction flow path 9 having a liquid flow path for introducing the liquid B from the liquid introduction port 4 and each branch flow path for dividing the introduction flow path into a plurality (four in this embodiment) are provided. The introduction divided flow path 10 is formed. Note that the introduction divided flow path 8 and the introduction divided flow path 10 correspond to the divided flow paths in the present invention.

The introduction channel 7 of the superposed surface 2a and the liquid inlet 3 of the superposed surface 1a, and the introduction channel 9 of the superposed surface 2a and the liquid inlet 4 of the superposed surface 1a.
Is communicated with each other. Also, the overlapping surface 2a
The two liquids A and B in the divided two introduction flow paths 8 and 10 are fed and merged and mixed in the mixing flow path 6 on the superposed surface 1a. The divided flow paths 8, 10 and the mixing flow path 6 are in communication. that time,
As shown in FIG. 2, the divided introduction channels 8, 10 of the overlapping surface 2 a are alternately connected in order from the upstream side (the side into which the liquid is introduced) of the mixing channel 6. I have. Therefore, when the overlapping surface 1a of the upper plate 1 and the lower overlapping surface 2a are overlapped, a flow path as shown in FIG. 2 is formed.

Further, as shown in FIG. 6, the introduction divided channels 10 are formed so that the depth D of each of the introduction divided channels 10 is larger than the width of the same introduction divided channel 10. Have been. Although not shown in FIG. 6, similarly,
Each of the introduction divided channels 8 is formed such that the depth D of each of the introduction divided channels 8 is larger than the width of the same introduction divided channel 8. As described in the column of “action”, “the depth of the groove of the divided flow path is larger than the width of the same divided flow path” in this specification means “the depth of the groove of the divided flow path”. The depth is the same as the length of the width of the divided flow path. " Therefore, the depth division D and the width | variety L are the same length, ie, the division | segmentation flow path 8 and 10 for an introduction whose aspect ratio which is the ratio of the depth D with respect to the width L is 1 are also included. The larger the aspect ratio, the more uniformly the two liquids A and B are laminated and mixed. However, the liquid almost reaches a plateau when the aspect ratio is around 2. Therefore, from the viewpoint that both the A and B liquids are more uniformly laminated and mixed, even if the aspect ratio is 2 or more, not so much effect can be obtained. Considering the mixing of the minute amount of liquid and the thickness of the plates 1 and 2, the aspect ratio is 1
~ 2 is preferred.

As described above, in this embodiment, the liquid inlet 3,
The introduction flow path 7 and the introduction division flow path 8 constitute the A liquid introduction flow path, and the liquid introduction port 4, the introduction flow path 9 and the introduction division flow path 10 constitute the B liquid introduction flow path. At the same time, the mixing channel 6 and the liquid outlet 5 constitute a mixed liquid outlet channel. Further, the two liquids A and B are alternately mixed in a uniform thin layer state in order from the introduction divided flow paths 8 and 10 to the upstream side (the liquid introduction side) of the mixing flow path 6, respectively. Will go.

In the case of the liquid mixer of the embodiment, the liquid inlets 3, 4 and the liquid outlet 5 are small holes each having a diameter of 1 mm. The upper and lower plates 1, 2 are each vertical:
45 mm, width: 20 mm, thickness: 1 mm quartz (SiO
₂ ) It is a flat plate. Each of the introduction channels 7, 9 and the introduction divided channels 8, 10 has a width of 50 μm.
m, the depth is 100 μm, and the mixing channel 6 has a width of 200 μm.
m and a depth of 20 μm. Here, the aspect ratio of the introduction divided flow paths 8 and 10 is 2 (width L = 50 μm, depth D
= 100 μm, aspect ratio = D / L = 100/50 =
2).

As shown in FIG. 2 and FIG. 6, in order to absorb the displacement of the substrates at the time of bonding during the manufacturing process of the liquid mixer, the end of each of the introduction divided flow paths 8 and 10 (the introduction end). In the case of the divided flow path 10, the left end of the flow path viewed from FIGS. 2 and 6)
Protrudes downstream from the mixing flow path 6 (in the case of the introduction divided flow path 10, the left side of FIGS. 2 and 6), even in such a structure, the A and B liquids are in a uniform thin layer state. Mixed. Conversely, if the end of each of the introduction divided flow paths 8 and 10 and the downstream side of the mixing flow path 6 are aligned by precisely performing alignment at the time of joining during the manufacturing process, such a case is possible. It may be a structure.

In this embodiment, the plates 1 and 2 are made of quartz (S
iO ₂ ), but the plate base material of each of the plates 1 and 2 includes:
An appropriate plate base can be selected from a glass plate, a silicon (Si) plate, a plastic plate, or a metal plate in accordance with the use or the type of liquid to be mixed. For example, in a case where the liquid mixture in the flow path is irradiated with appropriate light to detect reflected light or transmitted light to perform a spectral analysis of the liquid, transparent plates (for example, colorless transparent plates) are used as the plates 1 and 2. Glass plate) is used.

When liquids are mixed by the liquid mixer of the embodiment, liquid A or liquid B needs to be sent. This liquid sending is performed using a physical liquid sending method such as a syringe pump or an electric liquid sending method such as an electroosmotic flow. In the case of liquid transfer by electroosmotic flow, for example, electrodes are set in the liquid inlets 3 and 4 and the liquid outlet 5 and a liquid is moved by applying a voltage.

Next, a method of manufacturing the liquid mixer of the embodiment will be described. When manufacturing the liquid mixer of the embodiment,
After applying a mask covering the area other than the mixing channel to the surface to be the overlapping surface of the plate base material used for the upper plate 1, performing an etching process, and then removing the mask, Channels are dug and formed, and further, through holes are formed in the plate base material by sandblasting or ultrasonic processing to form the liquid inlets 3 and 4 and the liquid outlet 5, thereby producing the upper plate 1. .

On the other hand, a mask covering the area other than the part to be the introduction flow path and the introduction divided flow path is also applied to the surface to be the overlapping surface of the plate base material used for the lower plate 2. Then, after performing an etching process, the flow path is dug and formed by removing the mask, and the lower plate 2 is manufactured.

Then, the prepared plates 1 and 2 are bonded together in a watertight state by bonding them together on the superposed surface to complete the liquid mixer of the embodiment. As a bonding method, when the plate substrate is, for example, a glass substrate or a quartz substrate, both surfaces of the superposed surfaces 1a and 2a are slightly dissolved with a hydrofluoric acid-based chemical and the plates 1 and 2 are superposed and joined. Good. Or,
The plates 1 and 2 may be overlapped and bonded by applying a thin adhesive to both surfaces of the overlapping surfaces 1a and 2a.

As described above, the liquid mixer of the embodiment can be easily completed by simply manufacturing and bonding the plates 1 and 2 by using the so-called photolithography technology or micromachining technology. .

Next, the manner in which liquid is mixed by the liquid mixer of the embodiment having the above-described configuration will be described with reference to the drawings.

The liquid A to be mixed is introduced from the liquid inlet 3 into the introduction channel 7, and the liquid B to be mixed is introduced from the liquid inlet 4 into the introduction channel 9.

The liquid A introduced into the introduction flow path 7 flows toward the mixing flow path 6 while being divided into four by each introduction division flow path 8. The liquid B introduced into the introduction flow path 9 is divided into four by each introduction division flow path 10 while being mixed into four.
Flows towards

Next, the flow from the introduction divided flow path 10 to the mixing flow path 6 will be described with reference to the cross-sectional view of FIG. The flow from the introduction divided flow channel 8 to the mixing flow passage 6 is the same as that of the introduction divided flow passage 10, and a description thereof will be omitted.

Since each of the introduction divided channels 10 is formed such that the depth D of each of the introduction divided channels 10 is greater than the width of the same introduction divided channel 10, the introduction divided channels 10 are formed. The shear stress received from the width direction of the path 10 has a greater effect than the pressure received in the depth direction of the introduction divided flow path 10. Therefore, as shown in FIG. 7, when the liquid B flows into the introduction divided flow channel 10 in the direction of the arrow, it is uniformly diffused into the mixing flow channel 10. As a result, the layers can be uniformly stacked not only in the depth direction of the flow channel but also in the width direction of the flow channel.

On the other hand, since the introduction divided flow paths 8 and 10 and the mixing flow path 6 are formed on the overlapping surfaces of different plates and have a step, each of the divided introduction divided flow paths 8 and 10 has The liquid A or the liquid B that has reached the connection point (connection site S in FIG. 6) with the mixing flow path 6 flows into the mixing flow path 6 and, as shown in FIG. (Depth direction) and flow alternately, and are uniformly mixed and laminated in a thin layer state. Of course, since the depth of each mixing channel is the same, the thickness of each layer becomes half each time the layers are laminated. Therefore, at the liquid outlet 5, as the flow proceeds as an eight-layer flow in which four layers of the liquid A and four layers of the liquid B are alternately laminated,
Since the A and B liquids are adjacent to each other in a thin layer, the diffusion proceeds rapidly between the A and B liquids, and the two liquids are sufficiently mixed and flow out from the liquid outlet 5. Become. In addition, since the diffusion proceeds between the A and B liquids even during the lamination, the A
The liquid and the B liquid are not completely separated into two liquids at the illustrated layer.

As described in detail above, the introduction divided flow paths 8 and 10 are so arranged that the depth D of each of the introduction divided flow paths 8 and 10 is greater than the width of the same introduction divided flow path 8 and 10. , 10 are formed respectively, so that the introduction divided flow paths 8, 10
Each of the liquids A and B can flow uniformly into the mixing channel 6. As a result, the layers A and B can be uniformly laminated not only in the depth direction of the flow path but also in the width direction of the flow path. Is done.

The present invention is not limited to the above embodiment, but can be modified as follows.

(1) In the above-described embodiment, the mixing flow path 6 corresponding to the mixing flow path is provided on the superposed surface 1a of the upper plate 1 by the introduction division flow paths 8, 10 corresponding to the division flow paths.
Are formed on the superposed surface 2a of the lower plate 2 respectively. However, the mixing channel 6 is formed on the superposed surface 2a of the lower plate 2, and the superposed surface 1a of the upper plate 1 is formed.
May be formed. Even in the above case, the same operation and effect as in the present embodiment are achieved.

(2) In the above-described embodiment, as shown in the flow diagram of FIG. 2, the mixing flow path 6 and the introduction divided flow paths 8, 10 are configured to be orthogonal to each other. However, as shown in the modified example of FIG. 9, the flow path system may be configured to mix the liquid from oblique directions. However, since each liquid flows into the mixing channel 6 from an oblique direction, turbulent flow is likely to occur from the longitudinal direction of the mixing channel 6,
A channel system in which each liquid flows in from an orthogonal direction as in this embodiment is more preferable.

(3) In the above embodiment, the two types of liquids A and B are mixed. However, the number of types of liquids mixed by the liquid mixer of the present invention is two. The present invention is not limited thereto, and a configuration in which three or more types of liquids are mixed may be used.
For example, in the case of the liquid mixer of the modified example shown in FIG. 10, four types of liquids A to D can be mixed.

In the case of the embodiment, only one mixing unit is formed on the superimposed surface of the plates 1 and 2. However, in the liquid mixer of the modified example, as shown in FIG. The first and second three mixing units UA <b> 1 to UA <b> 3 are formed on
While mixing both A and B liquids in the mixing unit UA1,
The C and D liquids are mixed in the second mixing unit UA2, and the A and B liquid mixture and the C and D liquid mixture are further mixed in the third mixing unit UA3. To D liquids can be mixed. Of course, the mixing action in each of the mixing units UA1 to UA3 is exactly the same as in the embodiment. The mixing unit U includes only the first and third two mixing units UA1 and UA3.
In the case of a modified example having no A2, the liquid mixer has a configuration in which three types of liquids A to C are mixed.

(4) The flow path system other than the above-described embodiment is not particularly limited as exemplified in the modified examples (1) and (2). In addition, in the above-described embodiment, the introduction and mixing flow paths and the introduction divided flow paths were linear,
The shape of these flow paths may be a shape that repeats bending in an S-shape or a shape such as a spiral shape. In the above-described embodiment, the liquid inlets 3 and 4 and the liquid outlet 5 are open on the outer surface of the upper plate 1, but the liquid inlets 3 and 4 and the liquid outlet 5 are connected to the lower plate 2. It may be open on the outer surface, or may be open on the outer surfaces of the upper and lower plates 1 and 2 separately.

[0046]

As described above in detail, according to the liquid mixer according to the first aspect of the present invention, the depth of the groove of the divided flow path is larger than the width of the same divided flow path. Since the liquids are formed, the liquids can be uniformly laminated and mixed not only in the depth direction of the mixing channel but also in the width direction of the mixing channel. In the case of a simple structure, the liquid mixer according to the first aspect of the present invention can be constituted by only two plates. Therefore, even if the structure becomes complicated, the number of plates required to constitute the liquid mixer can be reduced as compared with the liquid mixer provided with the rectifying flow channel according to the improved invention. As a result, compared with the liquid mixer provided with the rectification flow channel according to the improved invention, a minute amount of liquid can be mixed efficiently and a simple liquid mixer can be configured.

According to the liquid mixer of the second aspect of the present invention, since each of the divided flow paths is joined to the mixing flow path at a different junction, the liquids are mixed in the mixing flow path in a thin layer state. Can be mixed uniformly. Therefore, the diffusion of each liquid can proceed promptly, and each liquid can be sufficiently mixed. As a result, the respective liquids can be efficiently mixed.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a liquid mixer according to an embodiment.

FIG. 2 is a flow path diagram showing a flow path configuration in the liquid mixer of the present embodiment.

FIG. 3 is a plan view showing a superposed surface of an upper plate of the liquid mixer of the present embodiment.

FIG. 4 is a plan view showing a superposed surface of a lower plate of the liquid mixer of the present embodiment.

FIG. 5 is a perspective view and a cross-sectional view for explaining the operation of the liquid mixer.

FIG. 6 is a perspective view for explaining the operation of the liquid mixer and the liquid mixer of the present embodiment.

FIG. 7 is a cross-sectional view showing a state where liquids join in the liquid mixer of the present embodiment.

FIG. 8 is a cross-sectional view showing a state where liquids merge from an upstream side to a downstream side in the liquid mixer of the present embodiment.

FIG. 9 is a flow path diagram showing a flow path configuration in a liquid mixer of a modified example.

FIG. 10 is a flow path diagram showing a flow path configuration in a liquid mixer of another modification.

FIG. 11 is a sectional view of a nozzle type liquid mixer according to a conventional example.

FIG. 12 is a sectional view of a liquid mixer provided with a rectifying flow channel according to the improved invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper plate 1a ... Laminated surface 2 ... Lower plate 2a ... Laminated surface 3, 4 ... Liquid inlet 5 ... Liquid outlet 6 ... Mixing channel Liquid outlet 7, 9 ... Introducing channel 8, 10 ... split channel for introduction

Claims (2)

[Claims] At least one of a plurality of plates joined together in a water-tight manner and superposed on each other, and a mixing channel is formed on one surface of the superposed surfaces of the plates and merged with the mixing channel on the other surface. A liquid mixer configured to form one divided flow path and inject a liquid into the divided flow path to mix the liquid flowing through the mixing flow path with the liquid flowing through the divided flow path; A liquid mixer, wherein the depth of a groove of a flow path is formed so as to be larger than the length of the width of the same divided flow path. 2. The liquid mixer according to claim 1, wherein
A liquid mixer comprising a plurality of the divided flow paths, wherein each divided flow path is joined to the mixing flow path at a different junction.