A brazing plate type separation condenser with controllable components

Abstract

The application discloses a brazing plate type liquid separation condenser with controllable components, and the specific implementation structure of the liquid separation condenser is composed of a plurality of working medium flow channel plates (10) and a plurality of refrigerant flow channel plates (20) which are alternately arranged and welded. The working medium flow channel is composed of a first-stage flow channel (11), an intermediate flow channel (12) and a second-stage flow channel (14). After the gaseous working medium enters the liquid separation condenser through a working medium inlet (1) and is separated into a plurality of streams, the working medium enters the first-stage flow channel (11) of the working medium flow channel, is cooled by the refrigerant to a two-phase state of gas-liquid coexistence, the liquid working medium is converged through a working medium first outlet (3) and is discharged from an external communication pipe (2), and the gaseous working medium enters the second-stage flow channel (14) after passing through the intermediate flow channel (12), is cooled by the refrigerant and is discharged from a working medium second outlet (4). The application can realize efficient separation of gas and liquid and precise control of the working medium dryness at the working medium first outlet, and then realizes controllable components of two working medium streams separated by the liquid separation condenser.

Description

Technical Field

[0001] This invention belongs to the field of mixed working fluid condensation technology, and particularly relates to a brazed plate type liquid separator with controllable composition. Background Technology

[0002] Component control methods can improve the operational flexibility and all-condition performance of thermodynamic cycles. For example, for refrigeration / heat pump cycles, by adjusting the components of the working fluid, the cooling / heating capacity and operating efficiency can be coordinated, thereby achieving efficient operation under different demand conditions. For organic Rankine cycles, by adjusting the components of the working fluid, the heat exchange process of the working fluid can be kept in good thermal matching under different operating environments, thereby achieving efficient operation under all conditions.

[0003] Separate liquid condensers can regulate the composition of the working fluid during condensation, serving both condensation and heat dissipation functions as well as composition adjustment. However, traditional separate liquid condensers can only perform passive composition regulation. They cannot actively adjust and control the composition of the two working fluids obtained from the outlet of the separate liquid condenser. Therefore, it is difficult to meet the composition requirements under all operating conditions of the thermodynamic cycle, and the gain effect on the thermodynamic cycle is limited. Summary of the Invention

[0004] The purpose of this invention is to propose a component-controllable brazed plate type liquid separator condenser to solve the problem that existing liquid separator condensers cannot achieve active adjustment and control of components, so as to meet the requirements of working fluid components under the full operating conditions of thermodynamic cycle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A component-controllable brazed plate type liquid separator condenser is composed of several working fluid flow channel plates 10 and several refrigerant flow channel plates 20 arranged and welded alternately.

[0007] The working fluid flow channel plate 10 is composed of a working fluid inlet 1, a first-pass flow channel 11, a first working fluid outlet 3, an intermediate flow channel 12, a second-pass inlet 13, a second-pass flow channel 14, and a second working fluid outlet 4.

[0008] The refrigerant flow channel plate 20 is composed 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 channel plate 20.

[0009] Compared with the prior art, the present invention has the following advantages and technical effects:

[0010] Based on the technology of brazed plate heat exchangers, this invention achieves low-flow gas-liquid separation of the working fluid through a segmented and partitioned layout, ensuring the uniformity and efficiency of the gas-liquid separation process. At the same time, this invention achieves precise control of the dryness of the working fluid at the gas-liquid separation point through independent control of the refrigerant flow, thereby enabling controllable composition of the two working fluids obtained from the separation of the liquid condenser. Attached Figure Description

[0011] The accompanying drawings, which form 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 undue limitation of this application. In the drawings:

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the working fluid flow channel plate in this invention;

[0014] Figure 3 This is a schematic diagram of the refrigerant flow channel plate in the present invention;

[0015] Figure 4 This is a schematic diagram of the flow of the working fluid on the working fluid flow channel plate in this invention;

[0016] Figure 5 This is a schematic diagram of the refrigerant flow on the refrigerant flow channel plate in this invention.

[0017] In the diagram: 1. Working fluid inlet; 2. External connecting 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. Intermediate flow channel; 13. Second pass inlet; 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. Fourth lower baffle.

[0018] In the diagram, bold lines indicate that the element has height, while normal lines indicate that the element does not have height. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figure 1-5 As shown, this embodiment provides a component-controllable brazed plate type liquid separator condenser, which is composed of several working fluid flow channel plates 10 and several refrigerant flow channel plates 20 arranged and welded alternately. Figure 1 The liquid separator condenser shown is composed of 4 layers of working fluid flow channel plates and 5 layers of refrigerant flow channel plates. The working fluid flow channel plate 10 consists of a working fluid inlet 1, a first-pass flow channel 11, a first working fluid outlet 3, an intermediate flow channel 12, a second-pass inlet 13, a second-pass flow channel 14, and a second working fluid outlet 4. 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 an intermediate flow channel 12.

[0022] In a normal working process, the gaseous working fluid enters the liquid separator condenser through the working fluid inlet 1, is divided into several streams, and then enters the first flow channel 11 of the working fluid flow path. It is cooled by the refrigerant to a two-phase state in which gas and liquid coexist. The liquid working fluid merges through the first working fluid outlet 3 and is discharged through the external connecting pipe 2. The gaseous working fluid enters the second flow channel 14 through the intermediate flow channel 12, is cooled by another stream of refrigerant, and is discharged through the second working fluid outlet 4.

[0023] The working fluid flow channel plate 10 has a corrugation angle of 120° and is vertically downward. The refrigerant flow channel plate 20 has a corrugation angle of 120° and is vertically upward.

[0024] The intermediate flow channel 12 has different structures on the working fluid flow channel plate 10 and the refrigerant flow channel plate 20. On the working fluid flow channel plate 10, the intermediate flow channel 12 is formed by a first lower baffle 151, a second 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 20, the intermediate flow channel 12 is formed by a second right baffle 171, a second upper baffle 173, a second left baffle 172, and a fourth lower baffle 174.

[0025] For the intermediate flow channel 12 on the working fluid flow channel plate 10, the first lower baffle 151 is a 60° arc shape, and its upper end point is tangent to the lower end point of the second lower baffle 152. The lower end point of the first lower baffle 151 is vertically aligned with the right end point of the first outlet 3 of the working fluid. The second lower baffle 152 is a 60° arc shape, and its upper end point is tangent to the lower end point of the first right baffle 153. The first upper baffle 154 is a 30° arc shape, and its lower end point is tangent to the first right baffle 153. 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 a 90° arc shape, 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.

[0026] For the intermediate flow channel 12 on the refrigerant flow channel plate 20, the second upper baffle 173 has the same structural parameters as the first upper baffle 154; the fourth lower baffle 174 has the same structural parameters as the third lower baffle 157; the upper part of the second right baffle 171 has the same structural parameters as the first right baffle 153, and its lower end point intersects with the lower end face 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, and its upper end point intersects with the lower end face of the refrigerant flow channel plate 20.

[0027] The working fluid inlet 1 and the second working fluid outlet 4 have the same diameter, which is half the diameter of the first working fluid 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 diameter. On the outermost refrigerant flow channel plate 20 of the liquid separator condenser, the external connecting pipe 2 is tangent to the first working fluid outlet 3 at its lowest point, and the external connecting pipe 2 has the same diameter as the second working fluid outlet 4.

[0028] For the intermediate flow channel 12 on the working fluid flow channel plate 10, the first lower baffle 151 can promote the upward movement of the gaseous working fluid at the first outlet 3 of the working fluid into the intermediate flow channel 12; the second lower baffle 152 can further constrain the upward movement of the gaseous working fluid into the intermediate flow channel 12; since the diameter of the external connecting 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 connecting pipe 2 to prevent the gaseous working fluid from escaping. 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 fluid and the external connecting pipe 2 together form a local gas-liquid separation structure. The cavity space is large and the design follows fluid mechanics. After the fluid enters this cavity, it will flow upward along the third lower baffle 157. During the flow, the liquid will form a backflow along the first lower baffle 151 due to gravity, while the gas has a lower density and is less affected by gravity. Due to centrifugal force, it will be "thrown" into the intermediate flow channel 12. Therefore, this structural design makes the gas-liquid separation process more efficient. Its flow vector distribution diagram is shown below. Figure 4 , Figure 5 As shown.

[0029] For the entire gas-liquid separator, the first outlet 3 of the working medium has a large diameter, and the gas working medium can be further interconnected through the first outlet 3 of the working medium. The large space volume and interconnected structural layout can make the gas working medium mixed evenly, making the gas-liquid separation process more uniform.

[0030] Figure 2 , Figure 3 , Figure 4 , Figure 5 The thick lines indicate that the outline has a certain height, i.e., the thickness of the flow channel plate; the normal lines in the figure (except for the corrugated plate lines) indicate that they are flush with the flow channel plate and have no height.

[0031] The dimensional parameters of the working fluid 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. Furthermore, the liquid-liquid separator of this invention is formed by brazing two types of plates, which can reduce mold design and processing costs during large-scale mass production, thus facilitating the further marketization of the invention.

[0032] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A component-controllable brazed plate type separatory condenser, characterized in that, It is composed of several working fluid flow channel plates (10) and several refrigerant flow channel plates (20) arranged and welded alternately; The working fluid flow channel plate (10) is composed of a working fluid inlet (1), a first-pass flow channel (11), a first working fluid outlet (3), an intermediate flow channel (12), a second-pass inlet (13), a second-pass flow channel (14), and a second working fluid outlet (4). The refrigerant flow channel plate (20) is composed 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 channel plate (20); The working fluid flow channel plate (10) is provided with corrugations, the corrugation angle is 120°, and the direction is vertically downward; The intermediate flow channel (12) of the working fluid flow channel plate (10) and the intermediate flow channel (12) of the refrigerant flow channel plate (20) have different structures; on the working fluid flow channel plate (10), the intermediate flow channel (12) is formed by a first lower baffle (151), a second 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 (20), the intermediate flow channel (12) is formed 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 channel plate (20) is provided with corrugations, the corrugation angle is 120°, and the direction of the corrugations is vertically upward; For the intermediate flow channel (12) on the working fluid flow channel plate (10), the first lower baffle (151) is a 60° arc shape, the upper end of the first lower baffle (151) is tangent to the lower end of the second lower baffle (152), and the lower end of the first lower baffle (151) is flush with the right end of the first outlet (3) of the working fluid in the vertical direction. The second lower baffle (152) is a 60° arc shape, and its upper end is tangent to the lower end of the first right baffle (153). The first upper baffle... The plate (154) is a 30° arc shape, with its lower end point tangent to the first right baffle (153) and its upper end point 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 a 90° arc shape, with its upper end point 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).

2. The component-controllable brazed plate type liquid separator condenser as described in claim 1, characterized in that: For the middle channel (12) on the refrigerant flow channel plate (20), the second upper baffle (173) has the same structural parameters as the first upper baffle (154); the fourth lower baffle (174) has the same structural parameters as the third lower baffle (157); the upper part of the second right baffle (171) has the same structural parameters as the first right baffle (153), and its lower end point intersects with the lower end face 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), and its upper end point intersects with the lower end face of the refrigerant flow channel plate (20).

3. The component-controllable brazed plate type liquid separator condenser as described in claim 1, characterized in that: The working medium inlet (1) and the working medium second outlet (4) have the same pipe diameter, which is 1 / 2 of the working medium first outlet (3) pipe diameter; 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 separator, the external connecting pipe (2) is tangent to the first outlet (3) of the working fluid at the lowest point, and the external connecting pipe (2) has the same diameter as the second outlet (4) of the working fluid.

4. The component-controllable brazed plate type liquid separator condenser as described in claim 1, characterized in that: The size parameters of the working fluid flow channel plate (10) and the refrigerant flow channel plate (20) are determined by the operating parameters and working fluid type under the specific application scenario.

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