A high energy efficiency economizer plate group of a multi-connected machine and heat pump

Abstract

The utility model discloses a kind of high-energy-efficiency economizer plate group of multiple connected machine and heat pump, including front end plate, rear end plate, multiple groups of heat exchange plate, wherein single group of heat exchange plate includes first, second and third plate laminated, and four around setting has the angle hole of cooperation flow, first plate and second plate have heat exchange chamber between, second plate and third plate have refrigerant chamber between, and respectively communicate two angle holes of opposite direction, heat exchange plate surface is provided with recessed corrugated part, corrugated part includes multiple V-type concave lines, waist round type recess, and regular pentagon recess.The utility model is laminated by three plates, forms two groups of independent passage and corresponding concave and convex lines, realizes the efficient heat exchange between medium, and is suitable for intermediate air supply or supercooling cycle of multiple connected machine and heat pump system.In addition, the combination of V-type, waist round type, regular pentagon and other geometric structures, improve heat transfer efficiency and structural strength simultaneously, solve the problem that traditional economizer heat exchange efficiency and pressure resistance are difficult to take into account.

Description

Technical Field

[0001] This utility model belongs to the field of plate economizer technology, specifically, it relates to a high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps. Background Technology

[0002] With global economic development and rising living standards, building energy consumption is constantly increasing, with air conditioning and heating being a major component. Against the backdrop of increasingly tight energy supplies and ever-increasing environmental requirements, reducing building energy consumption and improving energy efficiency have become urgent issues. Multi-split systems and heat pumps, as common air conditioning and heating equipment, play a crucial role in achieving energy conservation and emission reduction goals through improved energy efficiency. To improve the energy efficiency of multi-split systems and heat pumps, economizer technology has emerged. An economizer is a device used to improve the energy efficiency of refrigeration or heat pump systems, thereby achieving energy savings and efficiency gains. Currently, plate heat exchangers are a common type of economizer.

[0003] Plate heat exchangers are a new type of high-efficiency and economical heat exchanger composed of a series of metal plates with a specific corrugated shape. Thin rectangular channels are formed between the plates, through which heat exchange occurs. Plate heat exchangers are ideal devices for liquid-liquid and liquid-vapor heat exchange. They feature high heat exchange efficiency, low heat loss, compact and lightweight structure, small footprint, easy installation and cleaning, wide application, and long service life.

[0004] Currently, most plate heat exchangers are designed with circular through holes at both ends, stacked one on top of the other to form channels. The medium is then fed between the plates through the edges of the channels for heat exchange. However, the heat exchange channels are usually corrugated. The core idea is to induce fluid turbulence through the "corrugated shape" to enhance heat exchange. These corrugations are usually V-shaped, with a relatively simple structure. The two ends transition to the inlet and outlet ports through planes. Therefore, the fluid flows slowly and unevenly during the flow process. Moreover, it cannot improve the turbulence intensity, which increases the flow resistance and ultimately reduces the heat exchange efficiency.

[0005] Therefore, further improvements are needed to the corrugated structure of the heat exchange plates to enhance turbulence intensity, ensure their own strength, and improve heat exchange efficiency. Utility Model Content

[0006] In view of this, the technical problem to be solved by this utility model is to provide a high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps, so as to avoid the trouble of the previous heat exchanger plate flow channel using a single corrugation, which has low turbulence intensity and low heat exchange efficiency.

[0007] To solve the above-mentioned technical problems, this utility model discloses a high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps, including a front end plate, a rear end plate, multiple sets of heat exchange plates brazed between the front end plate and the rear end plate, and copper pipe joints installed around the front end plate. Each set of heat exchange plates includes a first plate, a second plate, and a third plate stacked together, and corner holes with matching flow are provided around the perimeter. There is a heat exchange chamber between the first plate and the second plate, and a refrigerant chamber between the second plate and the third plate. The heat exchange chamber is connected to the lower left and upper right corner holes, and the refrigerant chamber is connected to the lower right and upper left corner holes, forming two sets of intersecting medium passages. The surface of the heat exchange plates is provided with recessed corrugated parts, including multiple V-shaped grooves in the middle, multiple oval-shaped grooves near the lower right corner hole, and multiple regular pentagonal grooves near the lower left corner hole. The V-shaped grooves are arranged laterally.

[0008] According to one embodiment of the present invention, the above-mentioned V-shaped grooves, oval-shaped recesses, and regular pentagonal recesses are formed by pressing heat exchange plates, and the height of the recesses is 2-4mm, and there is a gap between the upper and lower layers after the heat exchange plates are stacked.

[0009] According to one embodiment of the present invention, the area occupied by the oval-shaped recess is larger than the area occupied by the regular pentagonal recess.

[0010] According to one embodiment of the present invention, the aforementioned corner hole is used to connect a copper pipe connector.

[0011] According to one embodiment of the present invention, the heat exchange plate is provided with triangular reinforcing ribs around the corner holes.

[0012] According to one embodiment of the present invention, the heat exchange plates are brazed together by copper foil, and the two opposite corner holes connecting the heat exchange chambers are spaced apart to allow for medium flow, while the other two opposite corner holes are welded together; the two opposite corner holes connecting the refrigerant chambers are spaced apart to allow for medium flow, while the other two opposite corner holes are welded together.

[0013] Compared with the prior art, the present invention can achieve the following technical effects:

[0014] By stacking three plates, two independent channels and corresponding textured surfaces are formed, enabling efficient heat exchange between the media and creating heat exchange chambers and refrigerant chambers. This design is suitable for intermediate gas injection or subcooling cycles in multi-split systems and heat pump systems. Furthermore, the combination of V-shaped, oval, and regular pentagonal geometric structures simultaneously improves heat transfer efficiency and structural strength, solving the problem of balancing heat exchange efficiency and pressure resistance in traditional economizers.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the above-mentioned technical effects at the same time. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the high-efficiency economizer plate assembly of the multi-split air conditioner and heat pump according to an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the heat exchange plate according to an embodiment of the present invention.

[0019] Attached Figure Labels

[0020] Front end plate 10, rear end plate 20, heat exchange plate 30, copper pipe joint 40, corner hole 50, V-shaped groove 61, oval recess 62, regular pentagonal recess 63, triangular reinforcing rib 70. Detailed Implementation

[0021] The following will describe in detail the implementation of this utility model with reference to the accompanying drawings and embodiments, so that the implementation of this utility model can be fully understood and carried out based on how technical means are used to solve technical problems and achieve technical effects.

[0022] Please refer to this as well. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the high-efficiency economizer plate assembly of the multi-split air conditioner and heat pump according to an embodiment of this utility model; Figure 2 This is a schematic diagram of the heat exchange plate according to an embodiment of the present invention.

[0023] As shown in the figure, a high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps includes a front plate 10, a rear plate 20, multiple sets of heat exchange plates 30 brazed between the front plate 10 and the rear plate 20, and copper pipe joints 40 installed around the front plate 10. Each set of heat exchange plates 30 includes a first plate, a second plate, and a third plate stacked together, with corner holes 50 around its perimeter for flow. A heat exchange chamber is formed between the first plate and the second plate. There is a refrigerant chamber between the heat exchange plate and the third plate, and the heat exchange chamber is connected to the two corner holes 50 at the lower left and upper right. The refrigerant chamber is connected to the two corner holes 50 at the lower right and upper left, forming two sets of intersecting medium passages. The surface of the heat exchange plate 30 is provided with a recessed corrugated part, which includes multiple V-shaped grooves 61 in the middle, multiple oval-shaped grooves 62 near the lower right corner hole 50, and multiple regular pentagonal grooves 63 near the lower left corner hole 50. The V-shaped grooves 61 are arranged laterally.

[0024] In one embodiment of this utility model, the front end plate 10 and the rear end plate 20 of the high-efficiency economizer are used for sealing. Four copper pipe joints 40 are arranged around the front end plate, which are divided into two opposing groups to form a refrigerant passage and a heat exchange passage. Multiple heat exchange plates 30 inside are stacked to complete heat exchange.

[0025] In detail, the heat exchange plates 30 are grouped into sets of three, with deep edge stamping. This, when assembled, forms upper and lower chambers—two independent heat exchange chambers and a refrigerant chamber—for the separate flow of the heat exchange medium and refrigerant. The heat exchange chambers are connected to the lower left and upper right corner holes 50, forming a diagonal arrangement, while the refrigerant chambers are connected to the lower right and upper left corner holes 50, forming another diagonal arrangement. This opposing arrangement ensures more uniform heat exchange. The corner holes 50 can be stamped downwards to allow for spacing or overlap between the upper and lower heat exchange plates 30, thus achieving both conduction and sealing. This is a standard design for the heat exchange plates 30 and will not be elaborated further. The heat exchange plates 30 are brazed together with copper foil, which can be welded at the edges and corner holes to ensure a tight seal and prevent chamber leakage.

[0026] The heat exchange plate 30 has recessed corrugated sections on its surface to enhance the turbulence intensity during the flow of the heat exchange medium and improve heat exchange efficiency. Specifically, the corrugated sections include multiple V-shaped concave lines 61 in the middle, multiple oval-shaped concave lines 62 near the lower right corner hole 50, and multiple regular pentagonal concave lines 63 near the lower left corner hole 50. The V-shaped concave lines 61 are designed laterally, forming a series of ridges, allowing the fluid to continuously rise and fall, thus enhancing turbulence. The oval-shaped concave lines 62 and regular pentagonal concave lines 63 on the left and right sides are close to the corner holes, which can accelerate the fluctuation of the medium at the beginning of the flow, enhance the turbulence effect, and make it converge more quickly to the V-shaped concave lines 61 in all directions, improving the uniformity and efficiency of heat exchange.

[0027] The V-shaped groove 61, the oval-shaped groove 62, and the regular pentagonal groove 63 of this utility model are formed by pressing heat exchange plates 30, and the height of the grooves is 2-4mm. Furthermore, there is a gap between the upper and lower layers after the heat exchange plates 30 are stacked to ensure flow and enhance the uniformity of heat exchange.

[0028] The area occupied by the oval-shaped depression 62 is larger than that occupied by the regular pentagonal depression 63. The oval-shaped depression 62 has a slightly larger area and is closer to the liquid inlet, which facilitates the flow of liquid.

[0029] Angle hole 50 is used to connect copper pipe connector 40 to complete the conduction of the medium.

[0030] In addition, the heat exchange plate 30 is provided with triangular reinforcing ribs 70 around the corner hole 50 to improve the strength around the corner hole 50 and prevent a reduction in durability.

[0031] In summary, this invention utilizes three stacked plates to form two independent pathways and corresponding textured surfaces, achieving efficient heat exchange between the media and creating a heat exchange chamber and a refrigerant chamber. It is suitable for intermediate gas injection or subcooling cycles in multi-split systems and heat pump systems. Furthermore, the combination of V-shaped, oval, and regular pentagonal geometric structures simultaneously improves heat transfer efficiency and structural strength, solving the problem of balancing heat exchange efficiency and pressure resistance in traditional economizers.

[0032] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps, comprising a front-end plate, a rear-end plate, multiple sets of heat exchange plates brazed between the front-end plate and the rear-end plate, and copper pipe joints installed around the front-end plate, characterized in that, The heat exchange plates in a single set include a first plate, a second plate, and a third plate stacked together, with corner holes around the perimeter for flow. A heat exchange chamber is formed between the first plate and the second plate, and a refrigerant chamber is formed between the second plate and the third plate. The heat exchange chamber is connected to the lower left and upper right corner holes, and the refrigerant chamber is connected to the lower right and upper left corner holes, forming two sets of intersecting medium passages. The surface of the heat exchange plates is provided with recessed corrugated portions, which include multiple V-shaped grooves in the middle, multiple oval-shaped grooves towards the lower right corner hole, and multiple regular pentagonal grooves towards the lower left corner hole. The V-shaped grooves are arranged laterally.

2. The high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps according to claim 1, characterized in that, The V-shaped grooves, oval-shaped recesses, and regular pentagonal recesses are formed by pressing the heat exchange plates, and the recess height is 2-4mm, with gaps between the upper and lower parts after the heat exchange plates are stacked.

3. The high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps according to claim 1, characterized in that, The area occupied by the oval-shaped recess is larger than the area occupied by the regular pentagonal recess.

4. The high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps according to claim 1, characterized in that, The corner hole is used to connect a copper pipe fitting.

5. The high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps according to claim 1, characterized in that, The heat exchange plates are provided with triangular reinforcing ribs around the corner holes.

6. The high-efficiency economizer plate assembly for multi-split air conditioners and heat pumps according to claim 1, characterized in that, The heat exchange plates are brazed together with copper foil. The two opposite corner holes connecting the heat exchange chambers are spaced apart to allow for medium flow, while the other two opposite corner holes are welded together. The two opposite corner holes connecting the refrigerant chambers are spaced apart to allow for medium flow, while the other two opposite corner holes are welded together.

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