CN111936217B - Water circulation loop system - Google Patents
Water circulation loop system Download PDFInfo
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- CN111936217B CN111936217B CN201880091767.6A CN201880091767A CN111936217B CN 111936217 B CN111936217 B CN 111936217B CN 201880091767 A CN201880091767 A CN 201880091767A CN 111936217 B CN111936217 B CN 111936217B
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- foreign matter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/009—Heating or cooling mechanisms specially adapted for settling tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2494—Feed or discharge mechanisms for settling tanks provided with means for the removal of gas, e.g. noxious gas, air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/0092—Devices for preventing or removing corrosion, slime or scale
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/02—Small separation devices for domestic application, e.g. for canteens, industrial kitchen, washing machines
Abstract
The foreign matter capturing device is provided with: a container portion; an inlet part arranged on the side surface of the container part and used for enabling water to flow into the container part; an outlet part which is arranged above the inlet part and enables water to flow out of the container part; a mesh which is arranged at a position opposite to the inlet part and is separated from the inlet part, and blocks the flow of water flowing into the container part; and a catching part which is arranged at the bottom of the container part and is lower than the inlet part, and catches the foreign matters in the water blocked by the net through the action of gravity.
Description
Technical Field
The present invention relates to a water circulation circuit system for trapping foreign matter contained in water.
Background
The heat exchanger is an indispensable technology for an air conditioning/cooling/heating apparatus. In nature, if a temperature difference occurs between two fluids that are close to each other, heat transfer along a temperature gradient occurs. In this case, the fluid refers to a liquid and a gas. The heat exchanger is designed with the intention of heating or cooling any fluid by means of this thermal movement.
The heat exchanger prevents the fluids from mixing by sandwiching a metal having a high thermal conductivity between the two fluids as a heat transfer surface, thereby realizing efficient heat exchange. Heat exchangers come in many types, including multi-tube, coil, double tube, plate, spiral, etc. The fluid for heat exchange is generally called a heat medium or a refrigerant, and fluorocarbon, ammonia, and the like are mainly used.
In air conditioning/cooling/heating apparatuses, there are products having a heat exchanger using water as a heat medium, and such products are called water heat exchangers. When iron members are connected to a product having a circulation circuit including a water heat exchanger, dissolved oxygen in the circulating water acts as an oxidizing agent, causing an oxidation reaction and rusting in some cases. In addition, when a product having a circulation circuit including a water heat exchanger is constructed, metal powder may remain in the flow path.
If foreign matter such as rust and metal powder is present in the water circulation circuit, the foreign matter may adhere to the heat exchanger to reduce the heat exchange efficiency or damage the components in the water circulation circuit. Therefore, it is necessary to remove foreign substances from circulating water in a water circulation circuit of an air conditioning/heating apparatus.
Conventionally, a technique for capturing foreign matter by utilizing centrifugal force, gravity, and inertial force in a water supply pipe of a nuclear reactor has been proposed (for example, see patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2005-140711
Disclosure of Invention
Problems to be solved by the invention
In the first example of patent document 1, although the inlet portion and the capturing portion are the same size, the flow path is narrowed because an obstacle is placed in the capturing portion. Therefore, there are problems as follows: the flow of water collides with the obstacle and the flow state is disturbed, but then the flow velocity increases and the foreign matter is curled up and flows out to the outside. In the second example, the filter member is provided so as to cover the entire cross section of the flow path, but this has a problem that the flow path is blocked and the pressure loss increases when the filter member is used for a long period of time.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a water circulation circuit system capable of suppressing the curling up of captured foreign matter and suppressing the increase of pressure loss even in long-term use.
Means for solving the problems
The water circulation circuit system of the present invention includes a foreign matter capturing device that removes foreign matter contained in water circulating in a water circulation circuit, the foreign matter capturing device including: a container portion; the inlet part is arranged on the side surface of the container part and enables water to flow into the container part; an outlet portion provided above the inlet portion and configured to discharge the water to the outside of the container portion; a mesh which is disposed apart from the inlet portion at a position facing the inlet portion and blocks a flow of the water flowing into the container portion; and a catching part provided at a position lower than the inlet part and at a bottom of the container part, for catching foreign substances contained in the water blocked by the mesh by the action of gravity.
Effects of the invention
The foreign matter catching device of the water circulation loop system according to the present invention includes: a mesh blocking a flow of water flowing into the container portion; and a catching part which is arranged at the bottom of the container part and below the inlet part and catches foreign matters in the water blocked by the net through the action of gravity. Therefore, the foreign matter trapping device can suppress the rolling up of the trapped foreign matter and can suppress the increase of the pressure loss even in long-term use.
Drawings
Fig. 1 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 1 of the present invention.
Fig. 2 is an enlarged schematic view of the surface structure of the mesh of the foreign matter capturing device according to embodiment 2 of the present invention.
Fig. 3 is an enlarged schematic view of a surface structure of a modified example of the mesh of the foreign matter capturing apparatus according to embodiment 2 of the present invention.
Fig. 4 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 3 of the present invention.
Fig. 5 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 4 of the present invention.
Fig. 6 is a first diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping apparatus according to embodiment 4 of the present invention.
Fig. 7 is a second diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping apparatus according to embodiment 4 of the present invention.
Fig. 8 is a third diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping apparatus according to embodiment 4 of the present invention.
Fig. 9 is a fourth diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping apparatus according to embodiment 4 of the present invention.
Fig. 10 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 5 of the present invention.
Fig. 11 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 6 of the present invention.
Fig. 12 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 7 of the present invention.
Fig. 13 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 8 of the present invention.
Fig. 14 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 9 of the present invention.
Fig. 15 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter capturing apparatus according to a modification of embodiment 9 of the present invention.
Fig. 16 is a schematic view of a vertical cross section and a schematic view in plan view of the foreign matter trap device according to embodiment 10 of the present invention.
Fig. 17 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter capturing apparatus according to a modification of embodiment 10 of the present invention.
Fig. 18 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 11 of the present invention.
Fig. 19 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter capturing apparatus according to a modification of embodiment 11 of the present invention.
Fig. 20 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 12 of the present invention.
Fig. 21 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 13 of the present invention.
Fig. 22 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter capturing apparatus according to a modification of embodiment 13 of the present invention.
Fig. 23 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap device according to embodiment 14 of the present invention.
Fig. 24 is a schematic diagram showing the configuration of a water circulation circuit according to embodiment 15 of the present invention.
Fig. 25 is a schematic diagram showing the configuration of a water circulation circuit according to a modification of embodiment 15 of the present invention.
Fig. 26 is a schematic diagram showing the configuration of a water circulation circuit according to embodiment 16 of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. In the following drawings, the dimensional relationship of each component may be different from the actual dimensional relationship.
Fig. 1 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap 100 according to embodiment 1 of the present invention. In fig. 1, black arrows indicate movement of the foreign matter 6.
As shown in fig. 1, the foreign matter trapping apparatus 100 according to embodiment 1 includes a hollow cylindrical container portion 1 having an outer contour. In fig. 1, the four corners of container portion 1 are each a right angle, but the present invention is not limited to this. The corners of the container portion 1 may be rounded, and the same applies to fig. 4 to 23 described later.
An inlet 2 for allowing water to flow into the container 1 is provided on a side surface of the container 1. An outlet portion 3 for allowing water flowing into the container portion 1 to flow out of the container portion 1 is provided at the top of the container portion 1 above the inlet portion 2. A mesh 5 that blocks the flow of water flowing into the container portion 1 is disposed on a straight line extending from the inlet portion 2 along the central axis of the container portion 1 and at a position apart from the inlet portion 2. That is, the mesh 5 is disposed at a position facing the inlet 2, and spaced apart from the inlet 2.
The mesh 5 has a plate shape and is provided perpendicularly to the inlet portion 2 in a plan view. In addition, in a plan view, the long sides of the mesh 5 are provided perpendicularly to a straight line extending from the inlet portion 2 along the central axis of the container portion 1. Since the mesh 5 is vertically present with respect to the extension line of the inlet portion 2, the water flowing into the container portion 1 has an effect of vertically colliding with the mesh 5. Further, a catching part 4 is provided at the bottom of the container part 1 below the inlet part 2, and the catching part 4 catches the foreign matters 6 contained in the water caught by the mesh 5 by the action of gravity.
In the container portion 1, a flow path from the inlet portion 2 to the outlet portion 3 is formed, but since the mesh 5 is disposed at a position separated from the inlet portion 2, the entire flow path cross section is not covered, that is, only a part of the flow path cross section is covered.
Next, a method of capturing the foreign matter 6 in the water by the foreign matter capturing apparatus 100 according to embodiment 1 will be described.
First, water such as circulating water containing foreign matter 6 flows into container 1 from inlet 2. The water flowing into the container portion 1 collides with the inlet portion 2 side (hereinafter, referred to as inlet side) of the mesh 5 disposed on a straight line extending from the inlet portion 2 along the central axis of the container portion 1 and at a position separated from the inlet portion 2, and is dispersed in all directions. That is, a part of the water colliding with the inlet side of the mesh 5 flows upward without passing through the mesh 5, and is discharged from the outlet portion 3 to the outside of the container portion 1. In addition, a part of the water flows in all directions along the surface of the mesh 5. The other part flows into the opposite side (hereinafter referred to as the opposite side) of the mesh 5 from the inlet portion 2 through the mesh 5. At this time, the foreign matter 6 having the same flow velocity as water flows into the opposite side of the mesh 5 through the mesh 5 by the inertial force.
The water flowing into the opposite side of the mesh 5 is decelerated by the collision against the inlet side of the mesh 5, and collides against the inner wall of the container portion 1 facing the inlet portion 2, and is divided into two flows in the upper and lower directions. The water flowing downward flows in the trap part 4 in a direction parallel to the bottom surface of the container part 1, is decelerated by the collision with the outlet side of the mesh 5, and then flows directly below the water inlet part 2. At this time, the foreign matter 6 is decelerated by the collision against the inlet side of the mesh 5, and therefore, it is settled by its own weight and descends to the catching portion 4 provided at the bottom of the container portion 1 below the inlet portion 2. Then, the liquid flows in the capturing part 4 in a direction parallel to the bottom surface of the container part 1, passes through the mesh 5, and is collected directly below the inlet part 2.
Although the upward flow of water is formed directly below the inlet 2, the flow velocity of water at this stage is close to 0, and therefore the foreign matter 6 collected directly below the inlet 2 is not curled up.
Further, since there is no water outlet below the inlet portion 2, the pressure loss is large and the inflow amount of water is small compared to the upper portion of the inlet portion 2. On the other hand, since the outlet of water is located above the inlet portion 2, the pressure loss is smaller than that below the inlet portion 2, and the inflow amount of water is larger. That is, the inflow amount of water in the upper part is larger than that in the lower part. In order to improve this effect, the volume of the portion above inlet portion 2 in container portion 1 may be made larger than the volume of the portion below inlet portion 2, and the pressure loss above inlet portion 2 may be further reduced.
In this way, the foreign matter capturing device 100 has the following configuration by disposing the mesh 5 on a straight line extending from the inlet 2 along the central axis of the container 1 and at a position apart from the inlet 2: the water flowing into the container portion 1 flows upward without passing through the mesh 5, and is discharged from the outlet portion 3 to the outside of the container portion 1. This can suppress an increase in pressure loss. Further, even if the openings of the mesh 5 are closed, the flow path of water can be ensured, and therefore, the pressure loss does not increase.
The material of the foreign matter catching device 100 of embodiment 1 is not particularly limited, but in consideration of workability, a non-magnetic metal or resin material such as copper, stainless steel, aluminum, brass, or the like may be used. The net 5 is a plate-like structure having a plurality of holes, such as a metal net formed by weaving metal wires, a punching metal formed by punching a plurality of holes in a plate-like metal, or a resin molded article designed to have a plurality of holes.
As described above, the foreign object capturing apparatus 100 according to embodiment 1 includes: a container part 1; an inlet part 2 arranged on the side surface of the container part 1 and used for making water flow into the container part 1; an outlet part 3 which is arranged above the inlet part 2 and makes water flow out of the container part 1; a mesh 5 which is disposed at a position facing the inlet 2 and is separated from the inlet 2, and blocks the flow of water flowing into the container 1; and a catching part 4 which is provided at a position lower than the inlet part 2 and at the bottom of the container part 1 and catches the foreign matters 6 contained in the water blocked by the mesh 5 by the action of gravity.
The foreign object capture device 100 according to embodiment 1 includes: a mesh 5 for blocking the flow of water flowing into the container part 1; and a catching part 4 which is provided at a position lower than the inlet part 2 and at the bottom of the container part 1 and catches the foreign matters 6 contained in the water blocked by the mesh 5 by the action of gravity. Therefore, the rolling up of the captured foreign matter 6 can be suppressed, and the increase in pressure loss can be suppressed even in long-term use.
In embodiment 1, the container portion 1 is illustrated as an example of a hollow cylindrical shape, but the present invention is not limited thereto, and may be a columnar shape such as a quadrangular prism or a triangular prism. The mesh 5 has a plate shape and is provided perpendicularly to the inlet portion 2 in a plan view, but is not limited thereto. By setting the mesh 5 on the extension line of the inlet 2, the mesh 5 blocks water, and the foreign matter 6 is settled by its own weight. The inlet portion 2 is provided perpendicularly to the side surface of the container portion 1, but the angle of the inlet portion 2 to the side surface of the container portion 1 is not limited to being perpendicular. By positioning the inlet 2 on the side surface of the container 1, the water entering from the inlet 2 collides with the mesh 5, and therefore, the foreign matter 6 is effectively deposited. The outlet portion 3 is provided at the top of the container portion 1, but is not limited thereto, and may be provided at a side surface of the container portion 1 as long as it is positioned above the inlet portion 2.
Hereinafter, although embodiment 2 of the present invention will be described, parts overlapping with embodiment 1 will not be described, and the same or corresponding parts as embodiment 1 will be given the same reference numerals.
Fig. 2 is an enlarged schematic view of the surface structure of the mesh 5 of the foreign matter capturing apparatus 100 according to embodiment 2 of the present invention. Fig. 3 is an enlarged schematic view of a surface structure of a modified example of the mesh 5 of the foreign matter capturing apparatus according to embodiment 2 of the present invention.
In order to exhibit the effect of settling the foreign matter 6 described in embodiment 1, the average opening diameter of the mesh 5 may be made larger than the average particle diameter of the foreign matter 6 to be captured. The average opening diameter referred to herein means a value obtained by an arithmetic mean of the opening diameters r5 of the openings 7 of the mesh 5 shown in fig. 2, and the average particle diameter means a value obtained by an arithmetic mean of the particle diameters r6 of the foreign matter 6 shown in fig. 2.
In fig. 2, the shape of the openings 7 of the web 5 is shown as a circle, but as shown in fig. 3, the shape of the openings 7 of the web 5 may be a square. The average opening diameter in this case is a value obtained from the circle-equivalent diameter of the openings 7 of the mesh 5 shown in fig. 3, and the circle-equivalent diameter is a value obtained by calculating the diameter of a perfect circle corresponding to the area of the openings 7. While the shape of the opening 7 is illustrated as a circle or a square, the shape is not limited to this, and may be a triangle, a quadrangle, a pentagon, or the like, and in any case, the equivalent diameter of the circle of the opening 7 may be larger than the particle diameter.
In the conventional filter, the foreign matter 6 to be captured is captured on the surface by not passing the foreign matter 6, but in the mesh 5 of embodiment 2, it is important to pass the foreign matter 6 to be captured. Therefore, the average opening diameter of the mesh 5 needs to be larger than the average particle diameter of the foreign matter 6 to be captured. Preferably, the average opening diameter of the mesh 5 is 10 times or more the average particle diameter of the foreign matter 6 to be captured, so that the foreign matter 6 can easily pass through the mesh 5.
The foreign matter 6 in embodiment 2 is assumed to be a foreign matter generated in a water circulation circuit in an air-conditioning/cooling/heating facility, and iron rust generated in the water circulation circuit and metal powder remaining inside during construction are assumed as the foreign matter 6 to be captured. The average particle size of the rust and metal powder is assumed to be 100 μm or less.
In addition, the foreign matter trapping apparatus 100 according to embodiment 2 can also be used in an apparatus system larger than an air conditioner, a cooling/heating facility, and in this case, the mesh 5 needs to be designed according to the average particle size of the foreign matter 6 to be trapped.
In addition, in the foreign matter catching device 100 according to embodiment 2, it is important not to block the openings 7 of the mesh 5. Both magnetic particles and nonmagnetic particles are assumed for the foreign matter 6 as a capture object. Therefore, as the material of the mesh 5, a non-magnetic metal or resin material such as copper, non-magnetic stainless steel, aluminum, or brass can be used.
Hereinafter, although embodiment 3 of the present invention will be described, the description of the parts overlapping with embodiments 1 and 2 will be omitted, and the same or corresponding parts as those in embodiments 1 and 2 will be denoted by the same reference numerals.
Fig. 4 is a schematic view of a vertical cross section and a schematic view in a plan view of the foreign matter capturing apparatus 101 according to embodiment 3 of the present invention. In fig. 4, the open arrows indicate the flow of water, and the black arrows indicate the movement of the foreign matter 6.
As shown in fig. 4, the inner diameter r1 of the container part 1 is larger than the opening diameter r2 of the inlet part 2, whereby the trapping performance of the foreign matter trapping device 101 can be improved. This structure has the following effects: by reducing the flow velocity at the capturing portion 4 compared to the flow velocity at the inlet portion 2, gravity settling of the foreign matter 6 is promoted, and rolling up of the foreign matter 6 settled in the capturing portion 4 is suppressed. Further, the effect of the mesh 5 to promote the settling of the foreign matter 6 can be added to improve the capturing performance of the foreign matter capturing apparatus 100.
Hereinafter, embodiment 4 of the present invention will be described, but the description of the parts overlapping with embodiments 1 to 3 will be omitted, and the same or corresponding parts as those in embodiments 1 to 3 will be denoted by the same reference numerals.
Fig. 5 is a schematic view of a vertical cross section and a schematic view in plan view of the foreign matter trap 102 according to embodiment 4 of the present invention.
As shown in fig. 5, the net 8 according to embodiment 4 has a hollow cylindrical shape and is disposed in the vertical direction at the center of the container portion 1. By disposing the mesh 8 in this manner, the capturing effect of the foreign matter capturing device 100 can be improved.
As a method of fixing the net 8, there are a method of welding the net 8 to the bottom surface of the container part 1 and a method of providing 3 to 4 pillars (not shown) in the horizontal direction between the net 8 and the inner wall of the container part 1. The opening diameter of the mesh 8 of embodiment 4 is the same as the opening diameter r5 of the mesh 5 described in embodiment 2.
Fig. 6 is a first diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping device 102 according to embodiment 4 of the present invention. Fig. 7 is a second diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping device 102 according to embodiment 4 of the present invention. Fig. 8 is a third diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping device 102 according to embodiment 4 of the present invention. Fig. 9 is a fourth diagram illustrating a foreign matter trapping mechanism of the foreign matter trapping device 102 according to embodiment 4 of the present invention. In fig. 6 to 9, the open arrows indicate the flow of water, and the black arrows indicate the movement of the foreign matter 6.
Hereinafter, a foreign matter trapping mechanism of the foreign matter trapping device 102 according to embodiment 4 will be described with reference to fig. 6 to 9.
As shown in fig. 6, water and foreign matter 6 contained in the water flow into the container 1 from the inlet 2. The water and the foreign matter 6 flowing into the container portion 1 thereafter reach the mesh 8, and most of the water is blocked by the mesh 8 and surrounds the outer periphery of the mesh 8. Therefore, the flow rate of water in the container portion 1 becomes very small. On the other hand, since the average opening diameter of the mesh 8 is sufficiently larger than the foreign matter 6 as the object of capture, the foreign matter 6 flows into the inside of the mesh 8 by the inertial force.
Here, the opening ratio of the mesh 8 needs to be designed to exert an effect of causing water to surround the outer periphery of the mesh 8. Therefore, the pressure loss at the peripheral portion of the mesh 8 can be compared with the pressure loss at the time of passing through the opening portion of the mesh 8, and the latter can be designed to be larger. Here, the design may be performed so as to satisfy the following numerical expression. Δ p1Indicates the pressure loss, Δ p, of water passing through the peripheral portion of the mesh 8 by the same distance as the thickness of the mesh 82Indicating the pressure loss when water passes through the openings of the mesh 8.
[ mathematical formula 1]
[ mathematical formula 2]
Here, each symbol is as follows.
λ: coefficient of friction of pipe, L: thickness of openings of mesh, d: inner diameter of inlet of foreign matter capturing device, ρ: density of water, v: flow rate, ζ: coefficient of contraction
The pipe friction coefficient λ is obtained from the value of the reynolds number using a chemical overview, a mechanical overview, or the like. The shrinkage factor ζ is obtained from the value of the opening ratio of the mesh 8 by using a chemical process, a mechanical process, or the like.
At this time, if Δ p1、Δp2Satisfying the following equation (3), the effect of water surrounding the outer periphery of the mesh 8 can be exhibited.
[ mathematical formula 3]
Δp2＞Δp1
(3)
Therefore, the relationship of the equation (4) is obtained from the equations (1) to (3). The opening ratio of the mesh 8 may be designed so as to satisfy the equation (4).
[ mathematical formula 4]
Fig. 7 shows the movement of the foreign matter 6 after entering the inside of the mesh 8. The foreign matter 6 has an initial velocity v in the horizontal direction of the web 80. Here, the following is assumed: inside the mesh 8, the flow of water is blocked, which has no velocity in the horizontal direction although it is present. At this time, a balance between the viscous resistance generated on the side opposite to the traveling direction of the water and the force of the foreign matter 6 can be calculated, and the depth of the mesh 8, that is, the inner diameter can be determined so that the velocity of the foreign matter 6 in the horizontal direction in the mesh 8 is 0. Thus, a balanced force is established.
The viscous resistance of water is according to stokes' law,
[ math figure 5]
Ff＝-6πμRv
(5)
In addition, depending on the relationship between acceleration and force,
[ mathematical formula 6]
Fv＝ma
(6)
Assuming F of formula (5)fAnd F of formula (6)vThe balance is carried out, and the balance is carried out,
[ math figure 7]
-6πμRv＝ma
(7)
Here, each symbol is as follows.
μ: viscosity of water, R: radius of foreign matter, m: mass of foreign matter, v: speed, a: acceleration, t: time v0: initial velocity, x: position of foreign matter
The following is defined according to the definitions of the velocity and the acceleration.
[ mathematical formula 8]
v＝dx/dt
a＝dv/dt＝d2x/dt2
v＝v0+at
-6πμRdx/dt＝m(d2x/dt2) (8)
The differential equation of equation (8) is obtained as follows.
[ mathematical formula 9]
At this time, the maximum value of x is as follows.
[ mathematical formula 10]
Thus, the inner diameter d of the mesh 8mThe following equation is satisfied.
[ mathematical formula 11]
dm≥mv0/6πμR (11)
Fig. 8 shows a state in which water circulating around the outer periphery of the mesh 8 in fig. 6 is recombined on the side of the mesh 8 opposite to the inlet portion 2 (hereinafter, referred to as the opposite side). As shown in fig. 8, when the water meets at the opposite side of the mesh 8, the water collides, and the momentum of the water is reduced.
Fig. 9 shows the water after it has merged on the opposite side of the web 8. As shown in fig. 9, after the water is merged on the opposite side of the mesh 8, most of the water goes upward where the outlet portion 3 is located, and less water goes downward where the trap portion 4 is located. In the trap part 4, most of the flow of water is also blocked by the mesh 8, and the water further decreases in momentum around the outer periphery and joins again directly below the inlet part 2, but the flow velocity is already very small.
On the other hand, the foreign matter 6 moves to the position directly below the inlet 2 with the flow of water, but the flow velocity directly below the inlet 2 is very small, and the foreign matter 6 is not rolled up and the foreign matter 6 is continuously captured. At this time, the mesh 8 is present only in the central portion of the container portion 1, and the pressure loss does not increase. Further, even if the opening of the mesh 8 is closed, the flow path of water can be ensured, and therefore, an increase in pressure loss of the foreign matter capturing device 102 can be suppressed.
In embodiment 4, an example is shown in which the mesh 8 is disposed in the center portion of the container portion 1 in the vertical direction, but the present invention is not limited to this, and the mesh may be present on the extension line of the inlet portion 2. By placing the mesh 8 on the extension line of the inlet portion 2, the mesh blocks water, and the foreign matter 6 is deposited by its own weight.
Hereinafter, embodiment 5 of the present invention will be described, but the description of the parts overlapping with embodiments 1 to 4 will be omitted, and the same or corresponding parts as those in embodiments 1 to 4 will be denoted by the same reference numerals.
Fig. 10 is a schematic view of a vertical cross section and a schematic view in plan view of the foreign matter trap 103 according to embodiment 5 of the present invention.
In embodiment 4, a method of welding the mesh 8 having a hollow cylindrical shape to the bottom surface of the container portion 1 has been described, but the mesh 8 may have an effect of blocking the flow of water flowing from the inlet portion 2. Therefore, as long as the mesh 8 has a height larger than the opening diameter of the inlet portion 2, there may be no portion below the lower end of the inlet portion 2. Therefore, as shown in fig. 10, the mesh 8 of embodiment 5 does not have a portion below the lower end of the inlet portion 2. Also, the mesh 8 having a height larger than the opening diameter of the inlet portion 2 is provided at the same height as the inlet portion 2.
As a method for fixing the net 8, 3 to 4 support columns 9 may be provided in the horizontal direction between the net 8 and the inner wall of the container part 1. Even in this case, the effect of blocking the flow of water by the mesh 8 described in embodiment 4 is effective, and the foreign matter 6 is allowed to gravitationally settle in the mesh 8. Although the mesh 8 is not present in the capturing portion 4, the foreign matter 6 is continuously captured directly below the inlet portion 2 because the flow velocity in the capturing portion 4 is small.
Hereinafter, embodiment 6 of the present invention will be described, but the description of the parts overlapping with embodiments 1 to 5 will be omitted, and the same or corresponding parts as those in embodiments 1 to 5 will be denoted by the same reference numerals.
Fig. 11 is a schematic diagram of a vertical cross section and a schematic diagram in a plan view of the foreign matter trap 104 according to embodiment 6 of the present invention.
In embodiment 4, the mesh 8 is formed in a hollow cylindrical shape, but in order to further enhance the effect of blocking the flow of water and the effect of keeping foreign matter 6 inside the mesh 8, as shown in fig. 11, a filler 10 may be filled inside the mesh 8. The packing 10 herein refers to, for example, Raschig rings (Raschig rings) and saddle-type packings packed in spiral metal fibers, porous bodies, fibrous filters, reaction columns, and the like. The opening diameter of the filler 10 may be equal to or larger than the average opening diameter of the mesh 8. When the filler 10 is filled in the mesh 8, a cover may be provided to prevent the filler 10 from flowing out.
By filling the filler 10 in the mesh 8, the entry of water into the mesh 8 can be suppressed. Further, since the foreign matter 6 is deposited along the surface of the filler 10 inside the mesh 8, the effect of the foreign matter 6 remaining inside the mesh 8 can be improved.
Hereinafter, although embodiment 7 of the present invention will be described, the description of the parts overlapping with embodiments 1 to 6 will be omitted, and the same parts as or corresponding to embodiments 1 to 6 will be denoted by the same reference numerals.
Fig. 12 is a schematic view of a vertical cross section and a schematic view in a plan view of the foreign matter trap 105 according to embodiment 7 of the present invention.
In embodiment 6, the filler 10 is filled in the hollow cylindrical mesh 8, but instead of the mesh 8, a mesh 11 having a multi-layer roll shape may be disposed as shown in fig. 12 in order to exhibit the same effect. The opening diameter of the net 11 having a multi-layer roll shape may be the same as that of the net 8 having a hollow cylindrical shape, and the net of the same material as that of the net 8 may be formed by rolling up a plurality of layers. The effect obtained by the mesh 11 is equivalent to that of embodiment 6. That is, the foreign matter 6 can be prevented from entering the inside of the mesh 11 and from settling along the surface of the roll inside the mesh 11, and therefore, the effect of the foreign matter 6 remaining inside the mesh 8 can be enhanced. The web 11 may not have a multi-layer roll but may have a single-layer roll.
Hereinafter, although embodiment 8 of the present invention will be described, description of parts overlapping with embodiments 1 to 7 will be omitted, and the same reference numerals will be given to the same or corresponding parts as embodiments 1 to 7.
Fig. 13 is a schematic diagram of a vertical cross section and a schematic diagram in a plan view of the foreign matter trap 106 according to embodiment 8 of the present invention.
In embodiments 4 to 7, the meshes 8 and 11 having a cylindrical shape are used, but the shape of the mesh 5 is not necessarily limited to a cylindrical shape. The mesh 5 may have a three-dimensional structure such as a cone, a triangular prism, a triangular pyramid, a quadrangular prism, or a quadrangular pyramid, and may be disposed on a straight line extending from the inlet portion 2 along the center axis of the container portion 1 at a position separated from the inlet portion 2. Further, the mesh 5 itself does not need to be in contact with the bottom surface of the container portion 1 and to stand by itself, and as shown in fig. 13, the mesh 5 having a partial spherical shape may be disposed so as to be separated from the inlet portion 2 and bonded to the container portion 1.
Hereinafter, although embodiment 9 of the present invention will be described, the description of the parts overlapping with embodiments 1 to 8 will be omitted, and the same reference numerals will be given to the same or corresponding parts as embodiments 1 to 8.
Fig. 14 is a schematic view of a vertical cross section and a schematic view in a plan view of a foreign matter trap 107 according to embodiment 9 of the present invention. Fig. 15 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter capture device 100 according to a modification of embodiment 9 of the present invention.
In embodiments 1 to 8, the outlet portion 3 of the foreign matter capturing device 100 is provided above the inlet portion 2 and at the top of the container portion 1, but the outlet portion 3 may be provided above the inlet portion 2 and at the side surface of the container portion 1 as in the foreign matter capturing device 107 shown in fig. 14.
The foreign matter 6 that has reached the upper portion of the container portion 1 without being captured by the mesh 8 has a flow velocity directed vertically upward, but when the outlet portion 3 is disposed on the side surface of the container portion 1, the foreign matter 6 is not discharged outward as long as the direction of the flow does not become a right angle. Therefore, by disposing the outlet portion 3 on the side surface of the container portion 1, the following effects are exhibited: the foreign matter 6 that has not been captured by the mesh 8 and has flowed into the upper portion of the container portion 1 is prevented from being discharged from the outlet portion 3 to the container portion 1.
In order to further enhance this effect, the top of the container portion 1 may be formed in a truncated cone shape or a hemispherical shape, as in the foreign matter capturing device 108 shown in fig. 15. By making the top portion have a truncated cone shape or a hemispherical shape, particles having a flow velocity directed upward in the vertical direction and reaching the upper portion of the container portion 1 have a flow velocity directed downward in the vertical direction. This increases the possibility that the foreign matter 6 that has reached the upper side without being captured by the mesh 8 will again be washed into the flow of water from the inlet 2 to the mesh 8, and improves the capturing performance of the foreign matter capturing device 108.
Although embodiment 10 of the present invention will be described below, description of parts overlapping with embodiments 1 to 9 will be omitted, and the same reference numerals are given to the same or corresponding parts as embodiments 1 to 9.
Fig. 16 is a schematic diagram of a vertical cross section and a schematic diagram in a plan view of the foreign matter trap 109 according to embodiment 10 of the present invention. Fig. 17 is a schematic view of a vertical cross section and a schematic view in a plan view of a foreign matter capture device 110 according to a modification of embodiment 10 of the present invention.
As a method for improving the performance of capturing the foreign matter 6, a rectifying pipe 12 extending in the horizontal direction may be provided at the front stage of the inlet portion 2 as in a foreign matter capturing device 109 shown in fig. 16.
In the foreign matter capturing devices 100 to 108 described in embodiments 1 to 9, it is preferable that water flows in from the inlet 2 in the horizontal direction so that the water flowing in from the inlet 2 easily reaches the mesh 8. However, depending on the position of the foreign matter trap 109 when installed in the water circulation circuit, it is also possible to allow water to flow in with a downward or upward velocity component. As an example having a downward velocity component, as shown in fig. 17, there may be mentioned a case where the foreign object trap 110 is provided at the lowermost portion of the flow path facing downward in the vertical direction. Therefore, a rectifying pipe 12 extending in the horizontal direction is provided in the front stage of the water inlet portion 2. In this way, the run-up section can be provided, the velocity component in the vertical direction can be eliminated, and the water flowing in from the inlet 2 can easily reach the mesh 8.
Although embodiment 11 of the present invention will be described below, the description of the parts overlapping with embodiments 1 to 10 will be omitted, and the same or corresponding parts as those in embodiments 1 to 10 will be denoted by the same reference numerals.
Fig. 18 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap 111 according to embodiment 11 of the present invention. Fig. 19 is a schematic diagram of a vertical cross section and a schematic diagram in a plan view of a foreign matter trap 112 according to a modification of embodiment 11 of the present invention.
As a method for improving the efficiency of capturing the foreign matter 6, as shown in fig. 18, a structure may be adopted in which a shutter 13 is provided to prevent the foreign matter from rolling up. Here, an example in which the capturing efficiency of embodiment 4 is improved is shown.
The baffle 13 may be disposed between the inlet 2 and the mesh 8. As described in embodiment 4, the foreign matter 6 reaching the trap 4 is collected directly below the inlet 2 by the flow of water. Therefore, the baffle 13 having a width on the inlet portion 2 side larger than the inner diameter of the inlet portion 2 is provided between the inlet portion 2 and the mesh 8 at a position lower than the lower end of the inlet portion 2 and higher than the bottom surface of the container portion 1, thereby having an effect of suppressing the rolling. In addition, there is an effect as a guide to keep the flow of water from the inlet portion 2 to the mesh 8 horizontal. It is preferable that the position where the baffle 13 is disposed is higher than H/2 when the distance from the lower end of the inlet portion 2 to the bottom surface of the container portion 1 is H.
In addition, as shown in fig. 19, the baffle 13 may be provided so as to cover the area other than the mesh 8 below the inlet 2 of the foreign matter capturing device 112. The foreign matter 6 is settled inside the mesh 8, but only a very small part of the flow of water reaches the trap part 4 by the effect of the baffle 13. Therefore, the flow velocity of the water in the trap 4 is small, and the foreign matter 6 is not rolled up, thereby improving the trapping efficiency.
Hereinafter, although embodiment 12 of the present invention will be described, the description of the parts overlapping with embodiments 1 to 11 will be omitted, and the same parts as or corresponding to embodiments 1 to 11 will be denoted by the same reference numerals.
Fig. 20 is a schematic diagram of a vertical cross section and a schematic diagram in a plan view of the foreign matter trap device 113 according to embodiment 12 of the present invention.
In order to improve the maintainability, as shown in fig. 20, a plug 14 for foreign matter collection may be provided in the capturing unit 4 of the foreign matter capturing device 113, and a foreign matter collecting function for collecting the captured foreign matter 6 may be provided. In the case of long-term use, the efficiency of capturing the foreign matter 6 may be reduced, and therefore, it is preferable to periodically collect the foreign matter 6. The installation position of the cock 14 is most preferable in the trap part 4, particularly, immediately below the inlet part 2 where the foreign matters 6 are collected.
Although embodiment 13 of the present invention will be described below, description of parts overlapping with embodiments 1 to 12 will be omitted, and the same reference numerals are given to the same or corresponding parts as embodiments 1 to 12.
Fig. 21 is a schematic view of a vertical cross section and a schematic view in plan view of a foreign matter trap 114 according to embodiment 13 of the present invention. Fig. 22 is a schematic view of a vertical cross section and a schematic view in a plan view of a foreign matter capture device 115 according to a modification of embodiment 13 of the present invention.
As shown in fig. 21, a heating element 15 for heating water may be disposed in the container portion 1 of the foreign matter capturing device 114, and a water temperature adjusting function may be provided. By providing the foreign matter trap 114 with a water temperature adjusting function, it is possible to reduce the number of parts in the water circulation circuit and to save space.
Further, as shown in fig. 22, when the heating element 15 in the container portion 1 of the foreign substance trap device 115 is spirally disposed above the inlet portion 2 of the container portion 1, the effect of the mesh 8 is not hindered, and a temperature adjusting function with a larger output can be provided. In addition to this, a rod-like or U-shaped heating element 15 may also be used.
Although embodiment 14 of the present invention will be described below, description of parts overlapping with embodiments 1 to 13 will be omitted, and the same reference numerals are given to the same or corresponding parts as embodiments 1 to 13.
Fig. 23 is a schematic view of a vertical cross section and a schematic view in plan view of the foreign matter trap 116 according to embodiment 14 of the present invention.
As shown in fig. 23, the air outlet pipe 16 may be provided in the foreign matter catching device 116. By providing the air outlet pipe 16 in the foreign matter catching device 116, there is an effect of reducing the number of parts in the water circulation circuit and saving space. The air discharge pipe 16 described herein has a function of discharging the gas generated in the water circulation circuit to the outside of the circuit. The top of the container portion 1 is preferably set as a place where the air discharge pipe 16 is installed, because the air is directed upward. In embodiment 14, as shown in fig. 23, an example is shown in which an air discharge pipe 16 is provided on the upper surface of container portion 1 and on the left side of outlet portion 3, but the present invention is not limited to this, and any position may be provided as long as it is the upper surface of container portion 1.
Although embodiment 15 of the present invention will be described below, description of parts overlapping with embodiments 1 to 14 will be omitted, and the same reference numerals are given to the same or corresponding parts as embodiments 1 to 14.
Fig. 24 is a schematic diagram showing the configuration of a water circulation circuit 200 according to embodiment 15 of the present invention. Fig. 25 is a schematic diagram showing the configuration of a water circulation circuit 201 according to a modification of embodiment 15 of the present invention.
Fig. 24 shows an example in which the foreign matter trapping device 100 is installed in a water heater as an example of the water circulation circuit 200 in which the foreign matter trapping device 100 according to embodiment 1 is installed. Some water heaters use water as a heat medium, and the water at this time is called circulating water. The circulating water flows through a water circulation circuit 200 mainly including a pump 17, heat exchangers 18 and 19, an air discharge mechanism 20, an outdoor unit 21, and a heating device 22.
The pump 17 is for circulating the circulating water, and the heat exchanger 18 heats the circulating water by exchanging heat with the refrigerant heated by the outdoor unit 21. In addition, the heating device 22 is provided in an environment where the circulating water needs to be further heated. The circulating water is heat-exchanged with the tap water by the heat exchanger 19, and the tap water is heated to supply hot water to the user.
As shown in fig. 25, in an environment where additional heating of the circulating water is not necessary, the water circulation circuit 201 may not include the heating device 22. Piping and other parts of the circulation water circuit may rust due to aging. In addition, there is a fear that: in the laying work, metal cutting residue, sand, and the like remain in the pipe to become foreign matter 6, which damages the circulation water circuit and the components, and the foreign matter 6 adheres to the heat exchangers 18 and 19, thereby lowering the heat efficiency.
Therefore, when the foreign matter trapping device 100 according to embodiment 1 is installed in a water heater, the foreign matter 6 in the circulating water can be trapped, and the components of the circulation circuit can be protected, whereby the product life can be extended, and the increase in pressure loss during long-term use can be suppressed. In embodiment 15, not only the foreign matter capturing apparatus 100 according to embodiment 1 but also the foreign matter capturing apparatuses 101 to 116 according to embodiments 2 to 14 can be used.
In the water circulation circuit 200 shown in fig. 24, which requires the heating device 22, if the foreign matter trapping devices 114 and 115 shown in embodiment 13 are used, the heating device 22 can be omitted. Further, if the foreign matter catching device 116 shown in embodiment 14 is used, the air discharge mechanism 20 can be omitted.
As a method of using the water heater, the outdoor unit 21, the pump 17, and the heating device 22 are operated by turning on the switch of the water heater. Thereby, the circulating water filled in the circulation circuit provided with the pump 17 is heated. The tap water is heated by the heated circulating water via the heat exchanger 19, and the hot water is supplied to the user. In order to feed water by the pump 17, air in the circuit needs to be discharged. When air is accumulated in the pump 17, such as when water is added after installation or when gas is generated due to vaporization of water during heating operation, the pump 17 stops operating normally, and therefore the air is discharged by the air discharge mechanism 20.
In addition, if the foreign matter catching device 116 including the air outlet pipe 16 shown in embodiment 14 is used, the air outlet mechanism 20 can be omitted from the water circulation circuits 200 and 201.
Although embodiment 16 of the present invention will be described below, description of parts overlapping with embodiments 1 to 15 will be omitted, and the same reference numerals are given to the same or corresponding parts as embodiments 1 to 15.
Fig. 26 is a schematic diagram showing the configuration of a water circulation circuit 202 according to embodiment 16 of the present invention.
Fig. 26 shows an example in which the foreign matter trapping device 100 is installed in a water heater having a heating function as an example of the water circulation circuit 202 in which the foreign matter trapping device 100 according to embodiment 1 is installed. In the water circulation circuit 202 of the water heater according to embodiment 16, circulating water is passed through the radiator 23, and heat is radiated to provide an indoor heating function. When the foreign matter trapping device 100 according to embodiment 1 is mounted on a water heater having such a heating function, the foreign matter 6 in the circulating water can be trapped, and the components of the circulation circuit can be protected, whereby the product life can be extended, and an increase in pressure loss can be prevented. In embodiment 16, not only the foreign matter capturing apparatus 100 according to embodiment 1 but also the foreign matter capturing apparatuses 101 to 116 according to embodiments 2 to 14 can be used.
In addition, if the foreign matter catching device 116 including the air outlet pipe 16 shown in embodiment 14 is used, the air outlet mechanism 20 can be omitted from the water circulation circuit 202.
The features of the foreign matter capturing devices 101 to 116 according to embodiments 1 to 14 can be combined as appropriate.
Description of the reference numerals
1 container part, 2 inlet parts, 3 outlet parts, 4 catching parts, 5 meshes, 6 foreign matters, 7 opening parts, 8 meshes, 9 struts, 10 fillers, 11 meshes, 12 rectifier tubes, 13 baffles, 14 cocks, 15 heating elements, 16 air discharge pipes, 17 pumps, 18 heat exchangers, 19 heat exchangers, 20 air discharge mechanisms, 21 outdoor units, 22 heating devices, 23 radiators, 100-116 foreign matter catching devices and 200-202 water circulation loops.
Claims (10)
1. A water circulation circuit system comprising a foreign matter trap device for removing, as foreign matter, rust or metal powder contained in water circulating in a water circulation circuit to which a metal member is connected,
the foreign matter capturing device is provided with:
a container portion;
the inlet part is arranged on the side surface of the container part and enables water to flow into the container part;
an outlet portion provided above the inlet portion of the container portion and configured to discharge the water to the outside of the container portion;
a mesh which is disposed apart from the inlet portion at a position facing the inlet portion and blocks a flow of the water flowing into the container portion; and
a catching part provided at a lower position than the inlet part and at a bottom of the container part, for catching foreign substances contained in the water blocked by the mesh by the action of gravity,
the upper end of the mesh is located below the outlet portion,
the mesh is vertically present with respect to an extension line of the inlet part, whereby the water flowing into the container part collides vertically with the mesh.
2. The water circulation loop system of claim 1,
the average opening diameter of the mesh is larger than the average particle diameter of the foreign matter.
3. The water circulation loop system of claim 1 or 2,
the container portion has a hollow cylindrical shape,
the inner diameter of the container portion is larger than the opening diameter of the inlet portion.
4. The water circulation loop system of claim 1 or 2,
the mesh has a shape of a hollow cylinder,
the mesh is disposed in the center of the container portion in the vertical direction.
5. The water circulation loop system of claim 1 or 2,
the mesh is disposed perpendicular to the substantially horizontal bottom surface of the container portion.
6. The water circulation loop system of claim 1 or 2,
the outlet portion is disposed at the top of the container portion.
7. The water circulation loop system of claim 1 or 2,
the front section of the inlet part is provided with a rectifier tube extending along the horizontal direction.
8. The water circulation loop system of claim 1 or 2,
the water circulation loop system has a foreign matter recovery function of recovering captured foreign matters.
9. The water circulation loop system of claim 1 or 2,
the water circulation loop system has a water temperature regulation function.
10. The water circulation loop system of claim 1 or 2,
the water circulation circuit system is provided with an air discharge pipe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/015532 WO2019198227A1 (en) | 2018-04-13 | 2018-04-13 | Foreign matter trapping device and water circulation circuit comprising foreign matter trapping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111936217A CN111936217A (en) | 2020-11-13 |
| CN111936217B true CN111936217B (en) | 2022-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880091767.6A Active CN111936217B (en) | 2018-04-13 | 2018-04-13 | Water circulation loop system |
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| Country | Link |
|---|---|
| JP (1) | JP6584688B1 (en) |
| CN (1) | CN111936217B (en) |
| DE (1) | DE112018007470B4 (en) |
| WO (1) | WO2019198227A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2019198227A1 (en) | 2020-04-30 |
| WO2019198227A1 (en) | 2019-10-17 |
| DE112018007470B4 (en) | 2023-02-02 |
| DE112018007470T5 (en) | 2020-12-24 |
| CN111936217A (en) | 2020-11-13 |
| JP6584688B1 (en) | 2019-10-02 |
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