CN117168023A - Component-controllable brazing plate type split liquid condenser - Google Patents

Abstract

The application discloses a brazing plate type split liquid condenser with controllable components, which is formed by alternately arranging and welding a plurality of working medium flow passage plates (10) and a plurality of refrigerant flow passage plates (20). The working medium flow passage consists of a first-pass flow passage (11), an intermediate flow passage (12) and a second-pass flow passage (14); the gas working medium enters the liquid-separating condenser through the working medium inlet (1) to be divided into a plurality of strands, then enters the first-pass flow passage (11) of the working medium flow passage respectively, is cooled by the refrigerant to a two-phase state of gas-liquid coexistence, the liquid working medium is converged through the working medium first outlet (3) and discharged from the external communicating pipe (2), the gas working medium enters the second-pass flow passage (14) after passing through the middle flow passage (12), and is discharged from the working medium second outlet (4) after being cooled by the refrigerant. The application can realize the high-efficiency separation of gas and liquid and the accurate control of the dryness of the working medium at the first outlet of the working medium, thereby realizing the controllability of the components of the two working mediums obtained by the separation of the liquid-separating condenser.

Description

A brazed plate liquid-separating condenser with controllable components

Technical field

The invention belongs to the technical field of mixed working fluid condensation, and in particular relates to a brazed plate type liquid-separating condenser with controllable components.

Background technique

The component control method can improve the operating flexibility and full-condition performance of the thermodynamic cycle. For example, for the refrigeration/heat pump cycle, by adjusting the circulating working fluid operating components, the cooling capacity/heating capacity and operating efficiency can be coordinated, thereby achieving different Efficient operation under demand conditions; for the organic Rankine cycle, by adjusting the operating components of the circulating working fluid, the heat exchange process of the working fluid in different operating environments can be maintained with good thermal matching, thereby achieving efficient operation under all working conditions.

The liquid-separating condenser can realize the control of the components of the working fluid during the condensation process, and has the functions of condensation heat dissipation and component adjustment. However, the traditional liquid-separating condenser can only perform passive component control. It cannot achieve active adjustment and control of the components of the two working fluids obtained at the outlet of the liquid-separating condenser. Therefore, it is difficult to meet the full thermodynamic cycle requirements. The component requirements under operating conditions are limited, and the gain effect on the thermodynamic cycle is limited.

Contents of the invention

The purpose of the present invention is to propose a brazed plate type liquid-separating condenser with controllable components to solve the problem that the existing liquid-separating condenser cannot realize active adjustment and control of components, so as to meet the requirements of the full operating conditions of the thermodynamic cycle. Demand for working fluid components.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A brazed plate liquid-separating condenser with controllable components is composed of a number of working medium flow channel plates 10 and a number of refrigerant flow channel plates 20 arranged and welded alternately;

The working medium flow channel plate 10 consists of a working medium inlet 1, a first-pass flow channel 11, a first working medium outlet 3, an intermediate flow channel 12 of the working medium flow channel plate 10, a second-pass inlet 13, a second pass It consists of 14 process flow channels and 4 second outlets for working fluid;

The refrigerant flow channel plate 20 consists of a first refrigerant inlet 7, a first refrigerant flow channel 22, a first refrigerant outlet 8, a second refrigerant inlet 5, a second refrigerant flow channel 21, a second refrigerant outlet 6, and a refrigerant flow channel. The middle flow channel 12 of the plate 20 is formed.

Compared with the existing technology, the present invention has the following advantages and technical effects:

Based on the technology of the brazed plate heat exchanger, the present invention realizes small-flow gas-liquid separation of the working fluid by dividing the working fluid into separate paths and ensures the uniformity and efficiency of the gas-liquid separation process; at the same time, the present invention Through the independent control of the refrigerant split flow, the dryness of the working fluid at the gas-liquid separation can be accurately controlled, thereby achieving controllable components of the two working fluids separated by the liquid-separating condenser.

Description of drawings

The drawings that form a part of this application are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the attached picture:

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic structural diagram of the working medium flow channel plate in the present invention;

Figure 3 is a schematic structural diagram of the refrigerant flow channel plate in the present invention;

Figure 4 is a schematic diagram of the flow of working fluid on the working fluid flow channel plate in the present invention;

Figure 5 is a schematic diagram of the flow of refrigerant on the refrigerant flow channel plate in the present invention.

In the picture: 1. Working fluid inlet; 2. External communication pipe; 3. First working fluid outlet; 4. Second working fluid outlet; 5. Second refrigerant inlet; 6. Second refrigerant outlet; 7. First refrigerant Inlet; 8. First refrigerant outlet; 10. Working fluid flow channel plate; 11. First-pass flow channel; 12. Middle flow channel; 13. Second-pass entrance; 14. Second-pass flow channel; 20. Refrigerant flow channel plate ; 21. Second refrigerant flow channel; 22. First refrigerant flow channel; 151. First lower baffle; 152. Second lower baffle; 153. First right baffle; 154. First upper baffle; 155 , upper support plate; 156, first left baffle; 157, third lower baffle; 158, lower support plate; 171, second right baffle; 172, second left baffle; 173, second upper baffle ; 174. The fourth lower baffle.

The bold lines in the figure indicate that they have height, and the normal lines indicate that they do not have height.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIGS. 1-5 , this embodiment provides a brazed plate liquid-separating condenser with controllable components, which is composed of a plurality of working medium flow channel plates 10 and a plurality of refrigerant flow channel plates 20 that are alternately arranged and welded. The liquid-separating condenser shown in Figure 1 is composed of 4 layers of working medium flow channel plates and 5 layers of refrigerant flow channel plates. The working medium flow channel plate 10 consists of a working medium inlet 1, a first-pass flow channel 11, a first working medium outlet 3, an intermediate flow channel 12 on the working medium flow channel plate 10, a second-pass inlet 13, and a second-pass flow channel. 14. It consists of 4 second outlets for working medium. The refrigerant flow channel plate 20 consists of a first refrigerant inlet 7, a first refrigerant flow channel 22, a first refrigerant outlet 8, a second refrigerant inlet 5, a second refrigerant flow channel 21, a second refrigerant outlet 6 and a refrigerant flow channel. It consists of an intermediate flow channel 12 on the plate 20.

In a normal working process, the gas working fluid enters the liquid-separating condenser through the working fluid inlet 1. After being divided into several streams, it enters the first flow channel 11 of the working fluid flow channel and is cooled by the refrigerant to a two-phase state in which gas and liquid coexist. , among which, the liquid working fluid merges through the first working fluid outlet 3 and is discharged through the external communication pipe 2. The gas working fluid passes through the intermediate flow channel 12 and enters the second pass flow channel 14. After being cooled by another stream of refrigerant, it passes through the second working fluid outlet. 4 discharge.

The corrugation angle of the working medium flow channel plate 10 is 120°, and the direction is vertically downward. The corrugation angle of the refrigerant flow channel plate 20 is 120°, and the direction is vertically upward.

The intermediate flow channel 12 has different structures on the working medium flow channel plate 10 and the refrigerant flow channel plate 20; on the working medium flow channel plate 10, the intermediate flow channel 12 is composed of a first lower baffle 151, a second Surrounded by a lower baffle 152, a first right baffle 153, a first upper baffle 154, an upper support plate 155, a first left baffle 156, a third lower baffle 157 and a lower support plate 158; on the refrigerant flow channel plate On the sheet 20 , the middle flow channel 12 is surrounded by a second right baffle 171 , a second upper baffle 173 , a second left baffle 172 , and a fourth lower baffle 174 .

For the middle flow channel 12 on the working medium flow channel plate 10, the first lower baffle 151 is in the shape of a 60° arc, and the upper end point of the first lower baffle 151 is tangent to the lower end point of the second lower baffle 152. The lower end point of the first lower baffle 151 is flush with the right end point of the first working medium outlet 3 in the vertical direction. The second lower baffle 152 is in the shape of a 60° arc, and its upper end point is tangent to the lower end point of the first right baffle 153 . The first upper baffle 154 has a 30° arc shape, its lower end point is tangent to the first right baffle 153 , and its upper end point is connected to the upper support plate 155 . The lower extension line of the upper support plate 155 coincides with the first left baffle 156 . The third lower baffle 157 is in the shape of a 90° arc, and its upper end point is tangent to the first left baffle 156 . The lower support plate 158 is connected to the third lower baffle 157, and its upper extension line coincides with the first right baffle 153.

For the intermediate flow channel 12 on the refrigerant flow channel plate 20, the structural parameters of the second upper baffle 173 and the first upper baffle 154 are the same; the structural parameters of the fourth lower baffle 174 and the third lower baffle 157 are the same; The upper part of the second right baffle 171 has the same structural parameters as the first right baffle 153, and its lower end intersects with the lower end surface of the refrigerant flow channel plate 20; the lower part of the second left baffle 172 has the same structural parameters as the first left baffle 156. The structural parameters are the same, and the upper end point intersects with the lower end surface of the refrigerant flow channel plate 20 .

The pipe diameters of the working medium inlet 1 and the second working medium outlet 4 are the same, which are 1/2 of the pipe diameter of the first working medium outlet 3. The first refrigerant inlet 7, the first refrigerant outlet 8, the second refrigerant inlet 5 and the second refrigerant outlet 6 have the same pipe diameter. On the outermost refrigerant flow channel plate 20 of the liquid-separating condenser, the external communication pipe 2 is tangent to the first outlet 3 of the working medium at the lowest point, and the external communication pipe 2 and the second outlet 4 of the working medium have the same diameter.

For the intermediate flow channel 12 on the working fluid flow channel plate 10, the first lower baffle 151 can promote the gas working fluid to move upward into the intermediate flow channel 12 at the first outlet 3 of the working fluid; the second lower baffle 152 can further The gas working fluid is restricted to move upward into the middle flow channel 12; since the diameter of the external communication pipe 2 is 1/2 of the diameter of the first outlet 3 of the working fluid, the liquid working fluid will first form a liquid seal at the external communication pipe 2 to prevent gas Working fluid escapes. On the other hand, the first lower baffle 151, the second lower baffle 152, the third lower baffle 157, the first left baffle 156, the first outlet 3 of the working medium and the external communication pipe 2 together form a gas-liquid separation partial structure. , this cavity has a large space and is designed to follow fluid mechanics. After the fluid enters this cavity, it will flow upward along the third lower baffle 157. During the flow process, the liquid will form along the first lower baffle 151 due to gravity factors. Backflow, while the gas density is small and is little affected by gravity, it will be "thrown" into the intermediate flow channel 12 due to centrifugal action. Therefore, the design of this structure makes the gas-liquid separation process more efficient. The flow vector distribution diagram is shown in Figure 4 and Figure 5.

For the entire gas-liquid separator, the first outlet 3 of the working medium has a larger pipe diameter, and the gas working medium can be further connected to each other through the first outlet 3 of the working medium. The larger space volume and interconnected structural layout can make the gas working medium doped. Mix evenly to make the gas-liquid separation process more uniform.

The bold lines in Figures 2, 3, 4, and 5 indicate that the contour line has a certain height, that is, the thickness of the flow channel plate; the normal lines in the figure (except for the corrugated plate lines) indicate that it is flush with the flow channel plate. , has no height.

The size parameters of the working medium flow channel plate 10 and the refrigerant flow channel plate 20 are determined by the operating parameters and the type of working fluid in the specific application scenario. Moreover, the liquid-separating condenser of the present invention is composed of two plates welded by brazing, which can reduce the design and processing costs of abrasive tools during large-scale batch production, and is helpful for further market promotion of the invention.

In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It is implied that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation and is therefore not to be construed as a limitation of the invention.

The above-described embodiments only describe the preferred modes of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can make various modifications to the technical solutions of the present invention. Deformations and improvements shall fall within the protection scope determined by the claims of the present invention.

Claims (6)

1. The brazing plate type split liquid condenser with controllable components is characterized by comprising a plurality of working medium runner plates (10) and a plurality of refrigerant runner plates (20) which are alternately arranged and welded;

the working medium flow passage plate (10) consists of a working medium inlet (1), a first-pass flow passage (11), a working medium first outlet (3), an intermediate flow passage (12) of the working medium flow passage plate (10), a second-pass inlet (13), a second-pass flow passage (14) and a working medium second outlet (4);

the refrigerant flow plate (20) consists of a first refrigerant inlet (7), a first refrigerant flow channel (22), a first refrigerant outlet (8), a second refrigerant inlet (5), a second refrigerant flow channel (21), a second refrigerant outlet (6) and an intermediate flow channel (12) of the refrigerant flow plate (20).

2. A composition-controlled brazing sheet type split liquid condenser according to claim 1 wherein:

the working medium runner plate (10) is provided with waves, the wave angle of the waves is 120 degrees, and the direction is vertically downward;

the intermediate flow channel (12) of the working medium flow channel plate (10) and the intermediate flow channel (12) of the refrigerant flow channel plate (20) have different structures; on a working medium runner plate (10), an intermediate runner (12) is surrounded by a first lower baffle plate (151), a second lower baffle plate (152), a first right baffle plate (153), a first upper baffle plate (154), an upper support plate (155), a first left baffle plate (156), a third lower baffle plate (157) and a lower support plate (158); on the refrigerant flow passage plate (20), the middle flow passage (12) is surrounded by a second right baffle (171), a second upper baffle (173), a second left baffle (172) and a fourth lower baffle (174);

the refrigerant flow passage plate (20) is provided with waves, the wave angle of the waves is 120 degrees, and the direction of the waves is vertically upward.

3. A composition-controlled brazing sheet type split liquid condenser according to claim 2 wherein:

for the middle runner (12) on the working medium runner plate (10), the first lower baffle (151) is in a 60-degree arc shape, the upper end point of the first lower baffle (151) is tangent with the lower end point of the second lower baffle (152), the lower end point of the first lower baffle (151) is in a level with the right end point of the first working medium outlet (3) in the vertical direction, the second lower baffle (152) is in a 60-degree arc shape, the upper end point of the second lower baffle is tangent with the lower end point of the first right baffle (153), the first upper baffle (154) is in a 30-degree arc shape, the lower end point of the first upper baffle is tangent with the first right baffle (153), the upper end point of the first upper baffle is connected with the upper support plate (155), the lower extension line of the upper support plate (155) is coincident with the first left baffle (156), the third lower baffle (157) is in a 90-degree arc shape, the upper end point of the lower support plate (158) is connected with the third lower baffle (157), and the upper extension line of the lower baffle is coincident with the first right baffle (153).

4. A composition-controlled brazing sheet type split liquid condenser according to claim 2 wherein:

for the middle flow channel (12) on the refrigerant flow channel plate (20), the structural parameters of the second upper baffle plate (173) and the first upper baffle plate (154) are the same; the fourth lower baffle (174) has the same structural parameters as the third lower baffle (157); the upper part of the second right baffle plate (171) has the same structural parameters as the first right baffle plate (153), and the lower end point of the second right baffle plate is intersected with the lower end surface of the refrigerant flow passage plate (20); the lower part of the second left baffle (172) has the same structural parameters as the first left baffle (156), and the upper end point of the second left baffle is intersected with the lower end surface of the refrigerant flow passage plate (20).

5. A composition-controlled brazing sheet type split liquid condenser according to claim 1 wherein:

the pipe diameters of the working medium inlet (1) and the working medium second outlet (4) are the same, and are 1/2 of the pipe diameter of the working medium first outlet (3);

the first refrigerant inlet (7), the first refrigerant outlet (8), the second refrigerant inlet (5) and the second refrigerant outlet (6) have the same pipe diameter;

on the refrigerant runner plate (20) at the outermost layer of the liquid separation condenser, an external communicating pipe (2) is tangent to a working medium first outlet (3) at the lowest point, and the pipe diameter of the external communicating pipe (2) is the same as that of a working medium second outlet (4).

6. A composition-controlled brazing sheet type split liquid condenser according to claim 1 wherein:

the size parameters of the working medium flow passage plate (10) and the refrigerant flow passage plate (20) are determined by the operation parameters and the working medium types in specific application scenes.