ARC-SHAPED PLATE HEAT EXCHANGER

Abstract

An arc-shaped plate heat exchanger, including a cylindrical housing and a heat-exchanging plate assembly. The heat-exchanging plate assembly includes two groups of arc-shaped heat-exchanging plates symmetrically disposed at either side of the axis of the housing. In each group of the arc-shaped heat-exchanging plate, multiple arc-shaped heat-exchanging plates are arranged from the housing center outward and form isolating first and second fluid channels, the plates' diameters increasing outward. During heat exchange, cold fluid enters the heat exchanger from the housing's first fluid inlet, and flows through straight channels of the arc-shaped heat-exchanging plates to exit from a first fluid outlet, while the hot fluid enters the heat exchanger from a second fluid entrance on the side wall of the housing, and flows through arc-shaped channels of the arc-shaped heat-exchanging plates to exit from a second fluid outlet. Heat exchange between the cold and hot fluid is thus achieved.

Claims

1. An arc-shaped plate heat exchanger, comprising a cylindrical housing and a heat-exchanging plate assembly disposed in the housing, the housing being provided with an inlet and an outlet that are in communication with a fluid passage in the heat-exchanging plate assembly, wherein the heat-exchanging plate assembly comprises two groups of arc-shaped heat-exchanging plates symmetrically disposed on two sides of an axis of the housing, each group of arc-shaped heat-exchanging plates comprises multiple arc-shaped heat-exchanging plates whose sizes gradually increase from the center of the housing outward, to form a first fluid passage and a second fluid passage that are spaced away from each other; two end surfaces of the first fluid passage parallel to the axis of the housing are sealed, and passage openings are provided on two end surfaces of the first fluid passage perpendicular to the axis of the housing, to form a straight passage along the axis of the housing; two end surfaces of the second fluid passage perpendicular to the axis of the housing are sealed, and passage openings are provided on two end surfaces of the second fluid passage parallel to the axis of the housing, to form an arc-shaped passage along a circumferential direction; and an area between the two groups of arc-shaped heat-exchanging plates is separated into an inlet collection chamber and an outlet collection chamber by a separator, inlet ends of multiple second fluid passages of the heat-exchanging plate assembly gather in the inlet collection chamber, and outlet ends of the multiple second fluid passages gather in the outlet collection chamber.

2. The arc-shaped plate heat exchanger according to claim 1, wherein two ends of the inlet collection chamber and the outlet collection chamber are sealed by using an end baffle.

3. The arc-shaped plate heat exchanger according to claim 1, wherein two side baffles extending along the axis of the housing are respectively disposed between the housing and two outmost arc-shaped heat-exchanging plates, and a gap between the housing and the heat-exchanging plate assembly is divided by the two side baffles into two cavities respectively in communication with the inlet collection chamber and the outlet collection chamber.

4. The arc-shaped plate heat exchanger according to claim 1, wherein the heat-exchanging plate assembly is further provided with baffle plates, and the baffle plates are disposed inside the inlet collection chamber and the outlet collection chamber, and connect end openings of two neighboring second fluid passages together, so that the multiple second fluid passages form a serial connection structure.

5. The arc-shaped plate heat exchanger according to claim 2, wherein the heat-exchanging plate assembly further comprises two reinforcing rings, and the two reinforcing rings are respectively sleeved on two ends of outmost arc-shaped heat-exchanging plates.

6. The arc-shaped plate heat exchanger according to claim 5, wherein the reinforcing rings are connected to an inner wall of the housing by using arc-shaped connection plates.

7. The arc-shaped plate heat exchanger according to claim 1, wherein the separator is a separation plate, the separation plate is disposed in an area between the two groups of arc-shaped heat-exchanging plates along the axis of the housing, and the separation plate is separately hermetically connected to two inmost arc-shaped heat-exchanging plates.

8. The arc-shaped plate heat exchanger according to claim 1, wherein the separator is a central pipe, two ends of the central pipe are respectively in communication with an inlet and an outlet on the housing that correspond to the straight passage, and the central pipe is provided with a butterfly valve.

9. The arc-shaped plate heat exchanger according to claim 1, wherein the separator is a spiral plate heat exchanger, the spiral plate heat exchanger has an axial passage and a spiral passage, an inlet and an outlet of the axial passage are respectively in communication with an inlet and an outlet of the straight passage in the housing, and an inlet and an outlet of the spiral passage are respectively in communication with an inlet and an outlet of the arc-shaped passage in the housing.

10. The arc-shaped plate heat exchanger according to claim 1, wherein two end surfaces of the first fluid passage parallel to the axis of the housing are sealed by using lateral sealing strips, or are sealed by a flange of any of one the arc-shaped heat-exchanging plates that form the fluid passage.

11. The arc-shaped plate heat exchanger according to claim 1, wherein two end surfaces of the second fluid passage perpendicular to the axis of the housing are sealed by using end sealing strips, or are sealed by a flange of any one of the arc-shaped heat-exchanging plates that form the fluid passage.

12. The arc-shaped plate heat exchanger according to claim 1, wherein supporting members are dispersedly disposed in the first fluid passages and the second fluid passages.

13. The arc-shaped plate heat exchanger according to claim 12, wherein the supporting members are metal columns or protrusions formed on a surface of arc-shaped heat-exchanging plates.

14. The arc-shaped plate heat exchanger according to claim 12, wherein multiple spacings between the second fluid passages are formed in the heat-exchanging plate assembly, and gradually increase from inside to outside.

15. The arc-shaped plate heat exchanger according to claim 12, wherein the density of supporting members in multiples second fluid passages of the heat-exchanging plate assembly gradually decreases from inside to outside.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The disclosure will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the disclosure, and where:

[0028] FIG. 1 is a schematic inner structural diagram of a heat exchanger according to the present invention;

[0029] FIG. 2 is a schematic structural diagram of a heat-exchanging plate assembly of a heat exchanger disposed in a housing according to the present invention;

[0030] FIG. 3 is a schematic structural diagram of a heat-exchanging plate assembly (which has a separation plate) of a heat exchanger according to the present invention;

[0031] FIG. 4 is a schematic structural diagram of a heat-exchanging plate assembly (which has a central pipe) of a heat exchanger according to the present invention;

[0032] FIG. 5 is a schematic structural diagram of a heat-exchanging plate assembly (which has a spiral plate heat exchanger) of a heat exchanger according to the present invention;

[0033] FIG. 6 is a schematic structural diagram of a heat-exchanging plate assembly (which has a central pipe and baffle plates) of a heat exchanger according to the present invention;

[0034] FIG. 7 is a schematic diagram of an inside structure of fluid passages (supporting members are metal strips) of a heat exchanger according to the present invention; and

[0035] FIG. 8 is a schematic diagram of an inside structure of fluid passages (supporting members are protrusions on surfaces) of a heat exchanger according to the present invention.

[0036] In the figures: 1. Housing, 101. First fluid inlet, 102. First fluid outlet, 103. Second fluid inlet, 104. Second fluid outlet, 2. Arc-shaped heat-exchanging plate, 201. First fluid passage, 202. Second fluid passage, 203. Side baffles, 204. Inlet collection chamber, 205. Outlet collection chamber, 206. End baffle, 3. Central pipe, 4. Butterfly valve, 5. Supporting member, 6. Lateral sealing strip, 7. End sealing strip, 8. Baffle plate, 9. Reinforcing rings, 10. Arc-shaped connection plate, 11. Separation plate, 12. Spiral plate heat exchanger

DETAILED DESCRIPTION

[0037] As shown in FIG. 1 to FIG. 6, an arc-shaped plate heat exchanger includes a cylindrical housing 1 and a heat-exchanging plate assembly disposed in the housing 1, the housing 1 being provided with an inlet and an outlet that are in communication with a fluid passage in the heat-exchanging plate assembly. The housing 1 is generally a cylindrical housing 1.

[0038] Two ends in a length direction of the housing 1 are respectively provided with a first fluid inlet 101 and a first fluid outlet 102. A side wall of the housing 1 is provided with a second fluid inlet 103 and a second fluid outlet 104. The heat-exchanging plate assembly includes two groups of arc-shaped heat-exchanging plates 2 symmetrically disposed on two sides of an axis of the housing 1. The radian of the arc-shaped heat-exchanging plate 2 is less than 180°. Each group of arc-shaped heat-exchanging plates 2 includes multiple arc-shaped heat-exchanging plates 2 whose sizes gradually increase from inside to outside starting from the center of the housing 1 to form a first fluid passage 201 and a second fluid passage 202 that are spaced away from each other.

[0039] As shown in FIG. 2 to FIG. 6, two end surfaces of the first fluid passage 201 parallel to the axis of the housing 1 are sealed. Two end surfaces of the first fluid passage 201 perpendicular to the axis of the housing 1 are separately provided with passage openings to form a straight passage along the axis of the housing 1. A hot fluid (a cold fluid) enters the straight passage from the first fluid inlet of the housing 1, then flows along the direction of the axis of the housing 1, and flows out from the first fluid outlet. Two end surfaces of the second fluid passage 202 perpendicular to the axis of the housing 1 are sealed. Two end surfaces of the second fluid passage 202 parallel to the axis of the housing 1 are separately provided with passage openings to form an arc-shaped passage in a circumference direction. A cold fluid (a hot fluid) enters the arc-shaped passage from the second fluid inlet of the housing 1, then flows along the arc-shaped passage, and flows out from the second fluid outlet.

[0040] As shown in FIG. 2 and FIG. 3, an area between the two groups of arc-shaped heat-exchanging plates 2 is separated by a separator into an inlet collection chamber 204 and an outlet collection chamber 205 that are respectively in communication with a corresponding inlet and a corresponding outlet of the housing 1. Inlet ends of multiple second fluid passages 202 of the heat-exchanging plate assembly gather in the inlet collection chamber 204, and outlet ends of the multiple second fluid passages gather in the outlet collection chamber 205. A second fluid first enters the inlet collection chamber 204 from the inlet of the housing 1, and then separately enters the second fluid passages through the inlet collection chamber 204. The fluid flowing out through the second fluid passages gathers in the outlet collection chamber 205, and flows out from the outlet of the housing 1. Two ends of the inlet collection chamber 204 and the outlet collection chamber 205 are sealed by using an end baffle 206 in a direction parallel to the axis of the housing 1, to prevent a first fluid from entering the inlet collection chamber 204 and the outlet collection chamber 205.

[0041] As shown in FIG. 2, two side baffles 203 extending along the axis of the housing 1 are respectively provided between the housing 1 and two outermost arc-shaped heat-exchanging plates 2, and a gap between the housing 1 and the heat-exchanging plate assembly is divided by the two side baffles 203 into two cavities respectively in communication with the inlet collection chamber 204 and the outlet collection chamber 205.

[0042] As shown in FIG. 1, the heat-exchanging plate assembly further includes two reinforcing rings 9, and the two reinforcing rings 9 are respectively sleeved on two ends of outmost arc-shaped heat-exchanging plates 2. The reinforcing rings 9 are fixedly welded to the arc-shaped heat-exchanging plates 2 and the end baffles. The reinforcing rings 9 may make the first fluid passages 201 effectively connected to the second fluid passages 202 of the heat-exchanging plate assembly. Arc-shaped connection plates 10 are disposed between the reinforcing rings 9 and an inner wall of the housing 1. The arc-shaped connection plates 10 are annular metal plates, are separately fixedly welded to the inner wall of the housing 1 and the reinforcing rings 9, and can effectively ease a temperature difference stress.

[0043] As shown in FIG. 3, the separator is a separation plate 11, the separation plate 11 is disposed in an area between the two groups of arc-shaped heat-exchanging plates 2 along the axis of the housing 1, and the separation plate 11 is separately hermetically connected to two inmost arc-shaped heat-exchanging plates 2.

[0044] As shown in FIG. 4, the separator is a central pipe 3, two ends of the central pipe 3 are respectively in communication with an inlet and an outlet on the housing 1 that correspond to the straight passage, and the central pipe 3 is provided with a butterfly valve 4. As an adjustment means, when the temperature on the outlet side needs to be increased, the central pipe 3 is opened by using the butterfly valve 4, so that a part of fluid is directly mixed into the fluid on the outlet side from the central pipe 3 to increase the temperature. The temperature may be adjusted by means of an open degree of the butterfly valve 4.

[0045] As shown in FIG. 5, the separator is a spiral plate heat exchanger 12, the spiral plate heat exchanger 12 has an axial passage and a spiral passage, an inlet and an outlet of the axial passage are respectively in communication with an inlet and an outlet of the straight passage in the housing 1, and an inlet and an outlet of the spiral passage are respectively in communication with an inlet and an outlet of the arc-shaped passage in the housing 1.

[0046] Two end surfaces of the first fluid passage 201 parallel to the axis of the housing 1 are sealed by using lateral sealing strips 6, or are sealed by a flange of any one of the arc-shaped heat-exchanging plates 2 that form the fluid passage.

[0047] Two end surfaces of the second fluid passage 202 perpendicular to the axis of the housing 1 are sealed by using end sealing strips 7, or are sealed by a flange of any one of the arc-shaped heat-exchanging plates 2 that form the fluid passage.

[0048] As shown in FIG. 7 and FIG. 8, supporting members 5 are dispersedly disposed in the first fluid passage 201 and the second fluid passage 202. The supporting members 5 are configured to maintain spacings of the fluid □ passages and the fluid □ passages, and can improve the pressure-bearing capability of an entire device.

[0049] The supporting members 5 are metal columns, and the metal columns are fixedly disposed inside the fluid passage.

[0050] The supporting members 5 are protrusions formed on surfaces of any one of the arc-shaped heat-exchanging plates 2.

[0051] There is a pressure difference between an inlet end and an outlet end of the fluid □ passage. A longer passage length indicates a larger pressure drop. Pressures on inlet sides of all passages are equal. Therefore, pressures on outlet sides of all the passages need to be basically the same if evenness of fluid distribution in the fluid II passage needs to be ensured. To achieve this objective, the following method may be used:

[0052] the density of supporting members 5 in multiple second fluid passages 202 maintains consistent, and spacings between the fluid passages gradually increase from inside to outside; or

[0053] spacings between multiple second fluid passages 202 of the heat-exchanging plate assembly maintain consistent, and the density of supporting members 5 in the fluid passages gradually decreases from inside to outside; or

[0054] multiple second fluid passages 202 of the heat-exchanging plate assembly gradually increase from inside to outside, and the density of supporting members 5 in the passages gradually decreases from inside to outside; or

[0055] the heat-exchanging plate assembly is further provided with baffle plates 8, the baffle plates 8 are disposed in the inlet collection chamber 204 and the outlet collection chamber 205 to connect second fluid passages 202 close to the inside and having relatively short flow paths in series to form a passage having a relatively long flow path.

[0056] During heat exchange, a cold fluid (or a hot fluid) enters a heat exchanger from a first fluid inlet of a housing 1, flows through a straight passage of arc-shaped heat-exchanging plates 2, and flows out from a first fluid outlet. A hot fluid (or a cold fluid) enters the heat exchanger from a second fluid inlet on a side wall of the housing 1, flows through an arc-shaped passage of arc-shaped heat-exchanging plates 2, and flows out from a second fluid outlet, thereby completing heat exchange between the cold fluid and the hot fluid.

[0057] Descriptions above are merely preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been disclosed above by using the preferred embodiments, the embodiments are not intended to limit the present invention. A person skilled in the art can make some equivalent variations, alterations or modifications to the above-disclosed technical content without departing from the scope of the technical solutions of the present invention to obtain equivalent embodiments. Any simple alteration, equivalent change or modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of the technical solutions of the present invention.