Heat exchanger and NMP recovery system
By designing refrigerant and heat medium channels with gradually changing widths in the heat exchanger and setting corrugated or staggered structures on the side walls, the problem of low heat exchange efficiency in the prior art is solved, and a more uniform and efficient heat transfer is achieved .
Patent Information
- Application Number
- CN202420121143.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-17
AI Technical Summary
In existing heat exchangers, the heat exchange efficiency of the interleaved positions of the heat medium channel and the refrigerant channel is low, resulting in uneven heat transfer and poor heat exchange efficiency.
A heat exchanger is designed, in which the widths of the refrigerant channel and the heat medium channel gradually change in the flow direction. The front end width of the refrigerant channel is small and the flow rate is fast, the rear end width is large and the flow rate is slow, the front end width of the heat medium channel is large and the back end is The width is small, and the heat exchange efficiency is improved through this design, and corrugated or staggered structures are provided on the side walls to extend the flow path and increase the heat exchange time.
The heat exchange efficiency between the heat medium channel and the refrigerant channel is improved, the heat transfer is evenly transmitted, the heat medium is avoided excessive cooling, the heat exchange time between the refrigerant and the heat medium is extended, and the overall heat exchange efficiency is improved.
Smart Images
Figure CN222187944U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of heat exchange equipment, and in particular to a heat exchanger and an NMP recovery system. Background Art
[0002] Heat exchangers, also known as heat exchangers or heat exchange equipment, are used to transfer heat from hot fluid to cold fluid. In the process of heat exchange, hot fluid and cold fluid are generally sent to the heat exchanger separately. After entering the heat exchanger, the heat of the hot fluid is transferred to the cold fluid through thermal radiation and heat conduction. The cold fluid absorbs the heat transferred by the hot fluid and its temperature rises, thus completing heat recovery, realizing the recycling of heat energy, and cooling the hot fluid.
[0003] In the prior art, the heat exchanger includes a plurality of hot medium channels and a plurality of cold medium channels that are intersectingly distributed, and the width dimensions of the hot medium channels and the cold medium channels are consistent. It should be noted that, along the flow direction of the hot fluid, since the hot fluid has gradually transferred heat to the cold fluid at the front end of the heat medium channel, the hot fluid cools down more near the rear end of the heat medium channel, resulting in poor heat exchange efficiency between the hot fluid and the cold fluid; similarly, along the flow direction of the cold fluid, since the cold fluid absorbs more heat at the front end of the cold medium channel, the cold fluid has heated up more near the rear end of the cold medium channel, resulting in a low temperature difference between the cold fluid and the hot fluid, and poor heat exchange efficiency; therefore, in the heat exchanger in the prior art, the heat exchange efficiency is low at the interlaced position of the rear end of the cold medium channel and the rear end of the hot medium channel. Utility Model Content
[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heat exchanger that can improve heat exchange efficiency.
[0005] The present application also proposes an NMP recovery system having the above heat exchanger.
[0006] The heat exchanger according to the first aspect of the present application includes:
[0007] A refrigerant transmission layer, comprising a plurality of refrigerant channels, wherein the refrigerant channels are used to transmit refrigerant along a first direction, and the plurality of refrigerant channels are distributed along a second direction; and along the second direction, the width of the refrigerant channels gradually increases;
[0008] The heat medium transmission layer is arranged on one side of the cold medium transmission layer and includes a plurality of heat medium channels, wherein the heat medium channels are used to transmit heat medium along the second direction, and the plurality of heat medium channels are distributed along the first direction; and along the first direction, the width of the heat medium channels gradually increases.
[0009] The heat exchanger according to the first aspect of the present application has at least the following beneficial effects: the temperature of the heat medium in the front end of the heat medium channel is relatively high, while the flow rate of the refrigerant in the refrigerant channel with a smaller width dimension is relatively fast, which can limit the heat exchange efficiency between the heat medium and the refrigerant and avoid excessive cooling of the heat medium; correspondingly, the temperature of the heat medium in the rear end of the heat medium channel is relatively low, but the flow rate of the refrigerant in the refrigerant channel with a larger width dimension is relatively slow, the heat exchange time between the refrigerant and the heat medium is relatively long, and the heat loss of the heat medium at the front end is relatively small, thereby improving the heat exchange efficiency between the refrigerant channel and the rear end of the heat medium channel. Similarly, the width dimension of the heat medium channel is gradually increased in the first direction, thereby improving the heat exchange efficiency between the rear end of the refrigerant channel and the heat medium channel. And the heat exchange between the refrigerant transmission layer and the heat medium transmission layer is uniform.
[0010] According to some embodiments of the present application, the side wall of the refrigerant channel is at least partially corrugated.
[0011] According to some embodiments of the present application, the corrugated side wall of the refrigerant channel includes a plurality of straight surfaces connected by folding or a plurality of curved surfaces connected.
[0012] According to some embodiments of the present application, the refrigerant channel includes a plurality of refrigerant segments along the first direction, and two adjacent refrigerant segments are staggered with each other along the second direction.
[0013] According to some embodiments of the present application, the side wall of the heat medium channel is at least partially corrugated.
[0014] According to some embodiments of the present application, the heat medium channel includes a plurality of heat medium segments along the second direction, and two adjacent heat medium segments are staggered with each other along the second direction.
[0015] According to some embodiments of the present application, the corrugated side wall of the heat medium channel includes a plurality of straight surfaces connected by folding or a plurality of curved surfaces connected.
[0016] According to some embodiments of the present application, the cold medium transmission layer and the hot medium transmission layer both include multiple layers, and the cold medium transmission layers and the hot medium transmission layers are alternately stacked.
[0017] The NMP recovery system according to the second aspect embodiment of the present application includes the heat exchanger of the first aspect embodiment.
[0018] According to the NMP recovery system of the second aspect embodiment of the present application, there are at least the following beneficial effects: including all the beneficial effects of the heat exchanger of the first aspect embodiment, which will not be repeated here.
[0019] According to some embodiments of the present application, an oven and a condenser are also included, and the air outlet end of the oven, the heat medium transmission layer, and the air inlet end of the condenser are connected in sequence; the air outlet end of the condenser, the cold medium transmission layer, and the air inlet end of the oven are connected in sequence.
[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:
[0022] Figure 1 A cross-sectional view of a refrigerant transmission layer of a heat exchanger according to an embodiment of the first aspect of the present application;
[0023] Figure 2 A cross-sectional view of a heat medium transmission layer of a heat exchanger according to an embodiment of the first aspect of the present application;
[0024] Figure 3 is a schematic diagram of the first refrigerant transmission channel;
[0025] Figure 4 for Figure 3 The enlarged view of point A in the middle;
[0026] Figure 5 is a schematic diagram of the second refrigerant transmission channel;
[0027] Figure 6 for Figure 5 Enlarged view of point B in the middle.
[0028] Reference numerals:
[0029] Refrigerant transmission layer 100, refrigerant channel 110, refrigerant section 111;
[0030] Heat medium transmission layer 200 and heat medium channel 210 . DETAILED DESCRIPTION
[0031] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0032] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0033] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0034] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0035] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0036] Reference Figure 1 and Figure 2 , a heat exchanger according to the first aspect of the present application comprises:
[0037] Reference Figure 1 The refrigerant transmission layer 100 includes a plurality of refrigerant channels 110, the refrigerant channels 110 are used to transmit the refrigerant along the first direction, and the plurality of refrigerant channels 110 are distributed along the second direction; and along the second direction, the width of the refrigerant channels 110 gradually increases;
[0038] Reference Figure 2 The heat medium transmission layer 200 is arranged on one side of the cold medium transmission layer 100 and includes a plurality of heat medium channels 210. The heat medium channels 210 are used to transmit heat medium along the second direction. The plurality of heat medium channels 210 are distributed along the first direction; and along the first direction, the width of the heat medium channels 210 gradually increases.
[0039] It is understood that the coolant is input into the coolant channel 110 along a first direction, and the coolant flows along the first direction in the coolant channel 110. The heat medium is input into the heat medium channel 210 along a second direction, and the heat medium flows along the second direction in the heat medium channel 210.
[0040] Since the width dimension of the refrigerant channel 110 gradually increases in the second direction, the larger the width dimension is, the slower the flow velocity of the refrigerant in the refrigerant channel 110 is, and correspondingly, the smaller the width dimension is, the faster the flow velocity of the refrigerant in the refrigerant channel 110 is.
[0041] Thus, the front end of the heat medium channel 210 (i.e., the end of the heat medium channel 210 close to the heat medium entering) exchanges heat with the coolant channel 110 with a smaller width, and the rear end of the heat medium channel 210 (i.e., the end of the heat medium channel 210 close to the heat medium flowing out) exchanges heat with the coolant channel 110 with a larger width. It should be understood that the temperature of the heat medium in the front end of the heat medium channel 210 is higher, and the flow rate of the coolant in the coolant channel 110 with a smaller width is faster, which can limit the heat exchange efficiency between the heat medium and the coolant and avoid excessive cooling of the heat medium; correspondingly, the temperature of the heat medium in the rear end of the heat medium channel 210 is lower, but the flow rate of the coolant in the coolant channel 110 with a larger width is slower, the heat exchange time between the coolant and the heat medium is longer, and the heat loss of the heat medium at the front end is less, thereby improving the heat exchange efficiency between the coolant channel 110 and the rear end of the heat medium channel 210.
[0042] Similarly, the width of the heat medium channel 210 is gradually increased in the first direction, thereby improving the heat exchange efficiency between the rear end of the cooling medium channel 110 and the heat medium channel 210 .
[0043] Furthermore, the heat exchange between the cooling medium transmission layer 100 and the heating medium transmission layer 200 is uniform.
[0044] Regarding the shape of the refrigerant channel 110, there are at least two of the following:
[0045] The first one: reference Figure 3 and Figure 4 According to some embodiments of the present application, the side wall of the refrigerant channel 110 is at least partially corrugated.
[0046] It is understandable that setting the side wall of the refrigerant channel 110 to be corrugated makes the cross-section of the refrigerant channel 110 corrugated, which increases the length of the refrigerant required to travel in the refrigerant channel 110, thereby increasing the heat exchange time between the refrigerant and the heat medium and improving the heat exchange efficiency.
[0047] In this embodiment, the entire refrigerant channel 110 is configured to be corrugated. In other embodiments, only a portion of the refrigerant channel 110 may be configured to be corrugated.
[0048] Reference Figure 4 Specifically, the corrugated side wall of the refrigerant channel 110 includes a plurality of straight surfaces connected by folding or a plurality of curved surfaces connected.
[0049] It is understandable that, referring to Figure 4 In this embodiment, the corrugated side wall of the coolant channel 110 includes a plurality of straight surfaces folded together to form a corrugated shape. In some other embodiments, the corrugated side wall of the coolant channel 110 may also be configured to have a plurality of curved surfaces connected together, so that the side wall of the coolant channel 110 forms a wave shape.
[0050] The second type: reference Figure 5 and Figure 6 According to some embodiments of the present application, the refrigerant channel 110 includes a plurality of refrigerant segments 111 along the first direction, and two adjacent refrigerant segments 111 are staggered with each other along the second direction.
[0051] It can be understood that the refrigerant channel 110 is divided into multiple refrigerant segments 111 along the first direction, and the refrigerant segments 111 on the same refrigerant channel 110 are staggered along the second direction, so that adjacent refrigerant channels 110 can be connected, so that turbulence is formed in the refrigerant channel 110 to reduce the flow rate of the refrigerant, thereby increasing the heat exchange time between the refrigerant and the heat medium, and improving the heat exchange efficiency.
[0052] Regarding the shape of the heat medium channel 210, there are at least two of the following:
[0053] The first type: According to some embodiments of the present application, the side wall of the heat medium channel 210 is at least partially corrugated. (The structure is consistent with the structure of the coolant channel 110, see Figure 3 and Figure 4 . )
[0054] It is understandable that the side wall of the heat medium channel 210 is configured to be corrugated so that the cross section of the heat medium channel 210 is corrugated, which increases the length of the heat medium required to travel in the heat medium channel 210, thereby increasing the heat exchange time between the heat medium and the cold medium and improving the heat exchange efficiency.
[0055] In this embodiment, the entire heat medium channel 210 is configured to be corrugated. In other embodiments, only a portion of the heat medium channel 210 may be configured to be corrugated.
[0056] According to some embodiments of the present application, the corrugated side wall of the heat medium channel 210 includes a plurality of straight surfaces connected by folding or a plurality of curved surfaces connected. (The structure is consistent with that of the coolant channel 110, see Figure 4 . )
[0057] It is understandable that, referring to Figure 4In this embodiment, the corrugated side wall of the heat medium channel 210 includes a plurality of straight surfaces folded together to form a corrugation. In some other embodiments, the corrugated side wall of the heat medium channel 210 may also be configured to have a plurality of curved surfaces connected to each other, so that the side wall of the heat medium channel 210 forms a wave shape.
[0058] Second: According to some embodiments of the present application, the heat medium channel 210 includes multiple heat medium segments along the second direction, and two adjacent heat medium segments are staggered along the second direction. (The structure is consistent with the structure of the cold medium channel 110, which can be referred to Figure 5 and Figure 6 . )
[0059] It can be understood that the heat medium channel 210 is divided into multiple heat medium segments along the first direction, and the heat medium segments on the same heat medium channel 210 are staggered along the second direction, so that adjacent heat medium channels 210 can be connected, so that turbulence is formed in the heat medium channel 210 to reduce the flow rate of the heat medium, thereby increasing the heat exchange time between the hot medium and the cold medium, and improving the heat exchange efficiency.
[0060] It should be noted that the refrigerant channel 110 and the heat medium channel 210 can both use the first form or the second form, or the refrigerant channel 110 uses the first form and the heat medium channel 210 uses the second form, or vice versa, which is not limited here.
[0061] In summary, the fins in the cooling medium transmission layer 100 and the heating medium transmission layer 200 are of straight type, corrugated type, and staggered type.
[0062] According to some embodiments of the present application, both the cooling medium transmission layer 100 and the heating medium transmission layer 200 include multiple layers, and the cooling medium transmission layer 100 and the heating medium transmission layer 200 are alternately stacked.
[0063] Wherein, two adjacent layers are connected by brazing through a composite plate.
[0064] It can be understood that the refrigerant transmission layer 100 and the heat medium transmission layer 200 are alternately stacked, that is, a layer of refrigerant transmission layer 100, a layer of heat medium transmission layer 200, a layer of refrigerant transmission layer 100, and a layer of heat medium transmission layer 200 are stacked in sequence, thereby improving the heat exchange effect of the heat exchanger of the present application.
[0065] The NMP recovery system according to the second aspect embodiment of the present application includes the heat exchanger of the first aspect embodiment.
[0066] According to the NMP recovery system of the second aspect embodiment of the present application, there are at least the following beneficial effects: including all the beneficial effects of the heat exchanger of the first aspect embodiment, which will not be repeated here.
[0067] According to some embodiments of the present application, an oven and a condenser are also included, and the air outlet end of the oven, the heat medium transmission layer 200, and the air inlet end of the condenser are connected in sequence; the air outlet end of the condenser, the refrigerant transmission layer 100, and the air inlet end of the oven are connected in sequence.
[0068] It can be understood that the hot air in the oven is discharged from the air outlet of the oven to the heat medium transfer layer 200, and is transferred to the condenser by the heat medium channel 210. The hot air is condensed into cold air through the condenser, and the NMP in the hot air is condensed and liquefied for easy recovery; then, the cold air is discharged from the air outlet of the condenser to the refrigerant transfer layer 100, and is transferred back to the oven by the refrigerant channel 110.
[0069] It should be understood that the hot air exhausted from the oven and the cold air exhausted from the condenser are heat exchanged through the heat exchanger of the present application to achieve the effect of heat recovery, and the hot air can be pre-cooled, thereby improving the utilization rate of energy.
[0070] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
Claims
1. A heat exchanger, characterized in that: include: A refrigerant transmission layer, comprising a plurality of refrigerant channels, wherein the refrigerant channels are used to transmit refrigerant along a first direction, and the plurality of refrigerant channels are distributed along a second direction; and along the second direction, the width of the refrigerant channels gradually increases; The heat medium transmission layer is arranged on one side of the cold medium transmission layer and includes a plurality of heat medium channels, wherein the heat medium channels are used to transmit heat medium along the second direction, and the plurality of heat medium channels are distributed along the first direction; and along the first direction, the width of the heat medium channels gradually increases.
2. The heat exchanger according to claim 1, characterized in that: At least a portion of the side wall of the refrigerant channel is corrugated.
3. The heat exchanger according to claim 2, characterized in that: The corrugated side wall of the refrigerant channel includes a plurality of straight surfaces connected by folding or a plurality of curved surfaces connected.
4. The heat exchanger according to claim 1, characterized in that: The refrigerant channel includes a plurality of refrigerant segments along the first direction, and two adjacent refrigerant segments are staggered with each other along the second direction.
5. The heat exchanger according to claim 1, characterized in that: The side wall of the heat medium channel is at least partially corrugated.
6. The heat exchanger according to claim 5, characterized in that The corrugated side wall of the heat medium channel includes a plurality of straight surfaces connected by folding or a plurality of curved surfaces connected.
7. The heat exchanger according to claim 1, characterized in that The heat medium channel includes a plurality of heat medium segments along the second direction, and two adjacent heat medium segments are staggered with each other along the second direction.
8. The heat exchanger according to claim 1, characterized in that The cooling medium transmission layer and the heating medium transmission layer both include multiple layers, and the cooling medium transmission layers and the heating medium transmission layers are alternately stacked.
9. NMP recovery system, characterized in that, A heat exchanger comprising any one of claims 1 to 8.
10. The NMP recovery system according to claim 9, characterized in that It also includes an oven and a condenser, wherein the air outlet of the oven, the heat medium transmission layer, and the air inlet of the condenser are sequentially connected; the air outlet of the condenser, the cold medium transmission layer, and the air inlet of the oven are sequentially connected.