Plate-fin heat exchanger suitable for different environment temperatures
By designing a structure of multiple return oil channels and bypass channels in a plate-fin heat exchanger, and using the second bypass valve to partially bypass the second core in a low temperature environment for cooling, the problems of large flow resistance in a low temperature environment and excessive cooling in a high temperature environment in the prior art are solved, and the efficient cooling effect is achieved to adapt to different ambient temperatures.
Patent Information
- Application Number
- CN202421886091.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-06
AI Technical Summary
The existing plate-fin heat exchangers have large flow resistance due to the high viscosity of lubricant and long flow channels in low temperature environments, which cannot be effectively cooled, and may also lead to excessive cooling and excessive pressure problems in high temperature environments.
A plate-fin heat exchanger is designed including an oil inlet passage, a first oil return passage, a second oil return passage, a first core and a second core, and is partially bypassed by the second bypass valve and the bypass passage in a low temperature environment to reduce flow resistance and pressure.
The problem of over-cooling of lubricating oil and excessive pressure is reduced in low-temperature environments, and adapts to low-temperature environments; the efficient cooling performance is maintained in high-temperature environments, avoiding excessive cooling.
Smart Images
Figure CN222864666U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wind power lubrication cooling systems, and in particular relates to a plate-fin heat exchanger suitable for different ambient temperatures. Background Art
[0002] In the wind power lubrication and cooling system, the lubricating oil is often cooled by heat exchange with air through a plate-fin heat exchanger. The existing plate-fin heat exchanger usually includes an oil inlet channel and an oil return channel arranged on one side of the oil inlet channel, a core is arranged between the oil inlet channel and the oil return channel, and a flow channel for connecting the oil inlet channel and the oil return channel is arranged inside the core. However, in a low temperature environment, the temperature of the lubricating oil is low and the viscosity is high, and the flow channel in the core of the existing plate-fin heat exchanger is long, which makes the flow resistance of the lubricating oil in the flow channel larger. Utility Model Content
[0003] In order to overcome the defects of the prior art, the utility model provides a plate-fin heat exchanger suitable for different ambient temperatures and capable of adapting to low-temperature environments.
[0004] The purpose of the utility model is achieved through the following technical solutions:
[0005] A plate-fin heat exchanger suitable for different ambient temperatures, comprising an oil inlet channel with an oil inlet port at one end, a first oil return channel at one side of the oil inlet channel, a second oil return channel at a side of the first oil return channel away from the oil inlet channel, a first core and a second core respectively arranged between the oil inlet channel and the first oil return channel, and between the first oil return channel and the second oil return channel, the first oil return channel and the second oil return channel are both connected to the same bypass channel at one end away from the oil inlet, and the second oil return channel is provided with an oil return port at one end away from the oil inlet; a second bypass valve is provided at one end of the first oil return channel away from the oil inlet, and the inlet end and the outlet end of the second bypass valve are respectively connected to the first oil return channel and the bypass channel.
[0006] The beneficial effects of adopting the above technical solution are as follows: in a higher temperature environment, the temperature of the lubricating oil flowing out is higher, its viscosity is lower, and the flow resistance of the lubricating oil in the flow channel is smaller. At this time, the lubricating oil flows through the first core, the first oil return channel and the second core in sequence, so as to facilitate the realization of the same high-power cooling as the existing plate-fin heat exchanger; in a lower temperature environment, the temperature of the lubricating oil flowing out is lower, its viscosity is higher, and the flow resistance of the lubricating oil in the flow channel is large. When the pressure at the first oil return channel exceeds the opening pressure of the second bypass valve, the second bypass valve opens, allowing only part of the lubricating oil to flow through the second core, while the other part of the lubricating oil is discharged through the bypass channel, so as to reduce or stop the second core from further cooling the lubricating oil, thereby avoiding excessive cooling of the lubricating oil and avoiding excessive pressure in the plate-fin heat exchanger, thereby adapting to the low temperature environment.
[0007] In one embodiment, the end of the oil inlet channel away from the oil inlet is connected to the bypass channel, and a first bypass valve is provided at the end of the oil inlet channel away from the oil inlet. The inlet end and the outlet end of the first bypass valve are connected to the oil inlet channel and the bypass channel respectively.
[0008] The beneficial effect of adopting the above technical solution is: the first bypass valve has a preset opening pressure, so that when the flow resistance of the lubricating oil through the flow channel in the first core is greater than the opening pressure of the first bypass valve, the first bypass valve is opened to allow the lubricating oil to be discharged through the bypass channel and the oil outlet in sequence, thereby reducing or no longer cooling through the first core and the second core.
[0009] In one embodiment, a plurality of first flow channels connecting the oil inlet channel and the first oil return channel are disposed in the first core, and a plurality of second flow channels connecting the first oil return channel and the second oil return channel are disposed in the second core.
[0010] The beneficial effect of adopting the above technical solution is: it is configured so that the lubricating oil in the oil inlet channel enters the first oil return channel through multiple first flow channels, and the lubricating oil in the first oil return channel enters the second oil return channel through multiple second flow channels, so as to improve the heat exchange efficiency.
[0011] In one embodiment, a plurality of first flow channels are evenly arranged in the first core along the length direction, and a plurality of second flow channels are evenly arranged in the second core along the length direction.
[0012] The beneficial effect of adopting the above technical solution is: such a configuration is conducive to the lubricating oil in the oil inlet channel to evenly enter the first oil return channel through multiple first flow channels, and is conducive to the lubricating oil in the first oil return channel to evenly enter the second oil return channel through multiple second flow channels, so as to facilitate efficient heat exchange.
[0013] In one embodiment, the oil inlet passage, the first oil return passage, and the second oil return passage are all parallel to each other.
[0014] In one embodiment, the length direction of the first flow channel and the length direction of the second flow channel are both perpendicular to the length direction of the first oil return channel.
[0015] The beneficial effect of adopting the above technical solution is that the lengths of the first flow channel and the second flow channel are shortened by such arrangement, thereby facilitating the reduction of the flow resistance of the lubricating oil in the first flow channel and the second flow channel.
[0016] In one embodiment, an oil drain port is provided at one end of the second oil return passage away from the oil return port.
[0017] The beneficial effect of adopting the above technical solution is that when the equipment is overhauled, the lubricating oil in the plate-fin heat exchanger can be drained in advance through the oil drain port.
[0018] In one embodiment, a valve or a plug is provided on the oil drain port.
[0019] The beneficial effect of adopting the above technical solution is: such a setting is conducive to opening or closing the oil drain port, thereby facilitating the control of oil draining.
[0020] In one embodiment, two ends of the bypass channel are connected to the oil inlet channel and the second oil return channel respectively.
[0021] The beneficial effects of the utility model are:
[0022] In a higher temperature environment, the temperature of the lubricating oil flowing out is higher, its viscosity is lower, and the flow resistance of the lubricating oil in the flow channel is smaller. At this time, the lubricating oil flows through the first core, the first oil return channel, and the second core in sequence, so as to achieve the same high-power cooling as the existing plate-fin heat exchanger; in a lower temperature environment, the temperature of the lubricating oil flowing out is lower, its viscosity is higher, and the flow resistance of the lubricating oil in the flow channel is large. When the pressure at the first oil return channel exceeds the opening pressure of the second bypass valve, the second bypass valve opens, allowing only part of the lubricating oil to flow through the second core, while the other part of the lubricating oil is discharged through the bypass channel to reduce or stop the further cooling of the lubricating oil by the second core, thereby avoiding over-cooling of the lubricating oil and avoiding excessive pressure in the plate-fin heat exchanger, thereby adapting to the low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
[0024] in:
[0025] Figure 1 A schematic structural diagram of an embodiment of the utility model is shown;
[0026] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.
[0027] Reference numerals:
[0028] 1- oil inlet, 2- oil inlet channel, 3- first bypass valve, 4- bypass channel, 5- first core, 6- second bypass valve, 7- first oil return channel, 8- second core, 9- oil return port, 10- second oil return channel, 11- oil drain port. DETAILED DESCRIPTION
[0029] The utility model will be further described below in conjunction with the accompanying drawings.
[0030] The utility model provides a plate-fin heat exchanger suitable for different ambient temperatures, such as Figure 1As shown, it includes an oil inlet channel 2 with an oil inlet port 1 at one end, a first oil return channel 7 is provided on one side of the oil inlet channel 2, a second oil return channel 10 is provided on the side of the first oil return channel 7 away from the oil inlet channel 2, a first core 5 and a second core 8 are provided between the oil inlet channel 2 and the first oil return channel 7, and between the first oil return channel 7 and the second oil return channel 10, respectively, the first oil return channel 7 and the second oil return channel 10 are both connected to the same bypass channel 4 at one end away from the oil inlet port 1, and an oil return port 9 is provided at one end of the second oil return channel 10 away from the oil inlet port 1; a second bypass valve 6 is provided at one end of the first oil return channel 7 away from the oil inlet port 1, and the inlet end and the outlet end of the second bypass valve 6 are respectively connected to the first oil return channel 7 and the bypass channel 4.
[0031] It can be understood that, in a higher temperature environment, the temperature of the lubricating oil flowing out is higher, its viscosity is lower, and the flow resistance of the lubricating oil in the flow channel is smaller. At this time, the lubricating oil flows through the first core 5, the first oil return channel 7 and the second core 8 in sequence, so as to facilitate the same high-power cooling as the existing plate-fin heat exchanger; in a lower temperature environment, the temperature of the lubricating oil flowing out is lower, its viscosity is higher, and the flow resistance of the lubricating oil in the flow channel is large. When the pressure at the first oil return channel 7 exceeds the opening pressure of the second bypass valve 6, the second bypass valve 6 opens, allowing only part of the lubricating oil to flow through the second core 8, while the other part of the lubricating oil is discharged through the bypass channel 4, so as to reduce or stop the further cooling of the lubricating oil by the second core 8, thereby avoiding excessive cooling of the lubricating oil and avoiding excessive pressure in the plate-fin heat exchanger, thereby adapting to the low temperature environment.
[0032] In one embodiment, the end of the oil inlet channel 2 away from the oil inlet port 1 is connected to the bypass channel 4, and a first bypass valve 3 is provided at the end of the oil inlet channel 2 away from the oil inlet port 1, and the inlet end and the outlet end of the first bypass valve 3 are connected to the oil inlet channel 2 and the bypass channel 4 respectively.
[0033] It can be understood that the first bypass valve 3 has a preset opening pressure so that when the flow resistance of the lubricating oil through the flow channel in the first core 5 is greater than the opening pressure of the first bypass valve 3, the first bypass valve 3 is opened to allow the lubricating oil to be discharged through the bypass channel 4 and the oil outlet in sequence, thereby reducing or eliminating cooling through the first core 5 and the second core 8.
[0034] In one embodiment, a plurality of first flow channels connecting the oil inlet channel 2 and the first oil return channel 7 are disposed in the first core 5 , and a plurality of second flow channels connecting the first oil return channel 7 and the second oil return channel 10 are disposed in the second core 8 .
[0035] It is understandable that the arrangement is such that the lubricating oil in the oil inlet channel 2 enters the first oil return channel 7 through multiple first flow channels, and the lubricating oil in the first oil return channel 7 enters the second oil return channel 10 through multiple second flow channels, so as to improve the heat exchange efficiency.
[0036] It should be noted that the heat exchange process of the lubricating oil occurs at the first core 5 and the second core 8. During the process of the lubricating oil flowing into the first flow channel and the second flow channel, the lubricating oil exchanges heat with the air outside the first core 5 or the second core 8 to achieve cooling.
[0037] In one embodiment, a plurality of first flow channels are evenly arranged in the first core 5 along the length direction, and a plurality of second flow channels are evenly arranged in the second core 8 along the length direction.
[0038] It can be understood that such a configuration is conducive to the lubricating oil in the oil inlet channel 2 to evenly enter the first oil return channel 7 through multiple first flow channels, and is conducive to the lubricating oil in the first oil return channel 7 to evenly enter the second oil return channel 10 through multiple second flow channels, so as to facilitate efficient heat exchange.
[0039] In one embodiment, the oil inlet passage 2, the first oil return passage 7 and the second oil return passage 10 are parallel to each other.
[0040] In one embodiment, the length direction of the first flow channel and the length direction of the second flow channel are both perpendicular to the length direction of the first oil return channel 7 .
[0041] It can be understood that such an arrangement can make the lengths of the first flow channel and the second flow channel shorter, thereby facilitating reduction of the flow resistance of the lubricating oil in the first flow channel and the second flow channel.
[0042] It should be noted that the widths of the first core 5 and the second core 8 may be the same or different, and they may be configured according to different ambient temperatures to further adapt to different ambient temperatures.
[0043] In one embodiment, an oil drain port 11 is provided at one end of the second oil return channel 10 away from the oil return port 9, so that the lubricating oil in the plate-fin heat exchanger can be drained in advance through the oil drain port 11 when the equipment is repaired; a valve or a detachable plug is provided on the oil drain port 11 to facilitate opening or closing the oil drain port 11, thereby facilitating the control of oil draining.
[0044] In one embodiment, two ends of the bypass channel 4 are connected to the oil inlet channel 2 and the second oil return channel 10 respectively.
[0045] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0046] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.
Claims
1. A plate-fin heat exchanger suitable for different ambient temperatures, characterized in that: The invention comprises an oil inlet passage (2) having an oil inlet port (1) at one end thereof, a first oil return passage (7) being provided at one side of the oil inlet passage (2), a second oil return passage (10) being provided at a side of the first oil return passage (7) away from the oil inlet passage (2), a first core (5) and a second core (8) being provided between the oil inlet passage (2) and the first oil return passage (7), and between the first oil return passage (7) and the second oil return passage (10), respectively; the first oil return passage (7) and the second oil return passage (10) being connected to the same bypass passage (4) at one end away from the oil inlet port (1), and an oil return port (9) being provided at one end of the second oil return passage (10) away from the oil inlet port (1); a second bypass valve (6) being provided at one end of the first oil return passage (7) away from the oil inlet port (1), and the inlet end and the outlet end of the second bypass valve (6) being connected to the first oil return passage (7) and the bypass passage (4) respectively.
2. A plate-fin heat exchanger suitable for different ambient temperatures according to claim 1, characterized in that: The end of the oil inlet channel (2) away from the oil inlet port (1) is connected to the bypass channel (4); the end of the oil inlet channel (2) away from the oil inlet port (1) is provided with a first bypass valve (3); the inlet end and the outlet end of the first bypass valve (3) are respectively connected to the oil inlet channel (2) and the bypass channel (4).
3. A plate-fin heat exchanger suitable for different ambient temperatures according to claim 1 or 2, characterized in that: The first core (5) is provided with a plurality of first flow channels connecting the oil inlet channel (2) and the first oil return channel (7), and the second core (8) is provided with a plurality of second flow channels connecting the first oil return channel (7) and the second oil return channel (10).
4. The plate-fin heat exchanger suitable for different ambient temperatures according to claim 3, characterized in that: A plurality of the first flow channels are evenly arranged in the first core (5) along the length direction, and a plurality of the second flow channels are evenly arranged in the second core (8) along the length direction.
5. The plate-fin heat exchanger suitable for different ambient temperatures according to claim 4, characterized in that: The oil inlet passage (2), the first oil return passage (7) and the second oil return passage (10) are all parallel to each other.
6. The plate-fin heat exchanger suitable for different ambient temperatures according to claim 5, characterized in that: The length direction of the first flow channel and the length direction of the second flow channel are both perpendicular to the length direction of the first oil return channel (7).
7. A plate-fin heat exchanger suitable for different ambient temperatures according to claim 1 or 2, characterized in that: An oil drain port (11) is provided at one end of the second oil return passage (10) away from the oil return port (9).
8. The plate-fin heat exchanger suitable for different ambient temperatures according to claim 7, characterized in that: The oil drain port (11) is provided with a valve or a plug.
9. The plate-fin heat exchanger suitable for different ambient temperatures according to claim 2, characterized in that: Both ends of the bypass channel (4) are connected to the oil inlet channel (2) and the second oil return channel (10) respectively.