Efficient frost blockage prevention low-temperature heat exchanger
By setting a serrated structure at the installation notch of the fin heating pipe to increase the contact area between the fin and the heating pipe, the problems of low defrost efficiency and high power consumption caused by too small contact area of the traditional fin heating pipe are solved, and the problem of low defrost efficiency and high power consumption is achieved. More efficient defrost and heat exchange effects.
Patent Information
- Application Number
- CN202421058526.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The contact area between the installation notch of the traditional fin heating pipe and the heating pipe is too small, resulting in poor defrost heat exchange efficiency, increasing power consumption, and increasing the storage temperature, becoming a "hazardous heat load" of the cold storage.
A serrated structure is provided at the installation notch to increase the contact area between the fins and the heating pipe, and connected to the U-shaped heat exchange pipe through a clawed serrated notch to increase the heat exchange area.
It improves defrost and heat exchange efficiency, reduces defrost time, reduces power consumption, and avoids the increase in the reservoir temperature, significantly improving the performance of the heat exchanger.
Smart Images
Figure CN222460362U_ABST
Abstract
Description
Technical Field
[0001] The utility model discloses a high-efficiency frost-proof low-temperature heat exchanger, which relates to the technical field of heat exchangers, and in particular to a high-efficiency frost-proof low-temperature heat exchanger. Background Art
[0002] As an important energy exchange equipment, fin-tube heat exchanger is widely used in chemical industry, refrigeration, transportation and other related fields. It has the advantages of high heat exchange efficiency and easy installation. According to different occasions, the heat exchange tube can be made of stainless steel tube, copper tube, etc.; the fin can also be made of steel belt, stainless steel belt, copper belt, aluminum belt, but once the heat exchanger is used in the low-temperature field, due to the need to lower the ambient temperature, the heat exchanger forms a temperature difference with the ambient temperature after cooling. When the surface of the heat exchanger fin is lower than the dew point temperature of the air, frost will form. The frost layer will cause the heating efficiency to decrease. In order to avoid frost blockage, the traditional refrigeration heat exchanger increases the fin spacing, but doing so will reduce the heat exchange area and sacrifice the heat exchange capacity.
[0003] At present, the most common defrosting method for low-temperature heat exchangers is electric heating tube defrosting, and the heating tube is installed on the back of the evaporator. Therefore, the fin structure generally has a U-shaped notch on the vertical edge. Such a traditional fin structure has certain defects, mainly because the contact area between the fin and the heating tube is too small, so the heat exchange efficiency is poor during defrosting, which will increase the defrosting time, increase power consumption, and even incomplete defrosting. Especially during long-term defrosting, the heat that is not exchanged between the heating tube and the fin will increase the storage temperature and become a "harmful heat load" for the cold storage.
[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of high-efficiency frost-proof low-temperature heat exchanger to overcome the problems existing in the prior art. Summary of the invention
[0005] According to the above-mentioned prior art, the contact area between the installation notch of the heating tube of the traditional fin and the heating tube is too small, resulting in poor double-ten heat exchange efficiency, increased defrosting time, increased power consumption and increased storage temperature, and other technical problems, and provide a high-efficiency anti-frost and low-temperature heat exchanger. The utility model mainly increases the contact area when installing the heat exchange tube by arranging a serrated structure at the installation notch, thereby ensuring the defrosting efficiency, heat exchange efficiency and safety of use without sacrificing the heat exchange amount.
[0006] The technical means adopted by the utility model are as follows:
[0007] A high-efficiency frost-proof low-temperature heat exchanger comprises: a tube sheet, fins and a heat exchange module;
[0008] Furthermore, there are three tube sheets, which are relatively evenly distributed;
[0009] Furthermore, a plurality of fins are evenly distributed in parallel between two adjacent tube sheets;
[0010] Furthermore, at least one set of heat exchange modules is installed between the three tube sheets;
[0011] Further, a plurality of claw-like serrated notches are provided at the rear of the fin;
[0012] Furthermore, the fins are connected and fixed to the heat exchange module through claw-type serrated notches.
[0013] Furthermore, the heat exchange module includes: three U-shaped heat exchange tubes and two elbows; the first tube of the first U-shaped heat exchange tube is the refrigerant inlet K1, the second tube of the first U-shaped heat exchange tube is connected to the first tube of the second U-shaped heat exchange tube through the elbow, the second tube of the second U-shaped heat exchange tube is connected to the first tube of the third U-shaped heat exchange tube through the elbow, the second tube of the third U-shaped heat exchange tube is the refrigerant outlet K2, the refrigerant enters from the refrigerant inlet K1 of the first tube of the first U-shaped heat exchange tube and flows out from the refrigerant outlet K2 of the second tube of the third U-shaped heat exchange tube, completing a heat exchange tube group cycle.
[0014] Further, the fins are corrugated fins, including: long fins and short fins;
[0015] Furthermore, the long fins and the short fins are arranged alternately.
[0016] Further, the short fins are arranged at the lower part of the heat exchanger.
[0017] Furthermore, the distance between the long fins and the short fins is 2-6 mm.
[0018] Furthermore, a number of claw-like serrated notches are added to the rear of the long fins and the short fins. By installing the U-shaped heat exchange tube, the serrations of the claw-like serrated notches are pressed down, thereby increasing the contact area between the fins and the heating tube, thereby increasing the heat exchange efficiency between the fins and the heating tube during defrosting.
[0019] Furthermore, the vertical spacing between the two claw-type serrated notches is 60 mm.
[0020] Compared with the prior art, the utility model has the following advantages:
[0021] 1. The high-efficiency frost-proof low-temperature heat exchanger provided by the utility model adopts an alternating arrangement of long and short fins. Since hot air moves upward and encounters cold air to frost, the utility model arranges the short fins under the heat exchanger, which reduces the formation of frost and ensures the heat exchange area of the heat exchanger.
[0022] 2. The utility model provides a high-efficiency frost-proof low-temperature heat exchanger. Multiple U-shaped heat exchange tubes are distributed to multiple groups of heat exchange modules, which effectively reduces the flow resistance of the refrigerant. At the same time, the arrangement of multiple heat exchange modules is exactly the same, which improves the assembly efficiency and maintenance efficiency.
[0023] 3. The utility model provides a high-efficiency frost-proof low-temperature heat exchanger, and claw-type serrated notches are arranged on both the long and short fins. The outer wall of the U-shaped heat exchange tube can be used to overwhelm the claw-type serrated structure of the claw-type serrated notches of the fins, forming multiple "elliptical surfaces" in contact with the U-shaped heat exchange tube, thereby increasing the contact area between the fins and the U-shaped heat exchange tube, thereby achieving the purpose of improving the heat exchange efficiency during defrosting and effectively reducing the defrosting time. Through experimental measurement, it is found that the defrosting efficiency of the heat exchanger is increased by 26%.
[0024] In summary, the technical solution of the utility model solves the problems in the prior art that the contact area between the installation gap of the traditional fin heating tube and the heating tube is too small, resulting in poor double-ten heat exchange efficiency, increased defrosting time, increased power consumption and increased storage temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0026] Figure 1 It is a schematic diagram of the structure of the utility model;
[0027] Figure 2 This is a schematic diagram of the claw-type serrated notch structure of the utility model;
[0028] Figure 3 It is a schematic diagram of the assembly of the U-shaped heat exchange tube and the claw-type serrated notch of the utility model;
[0029] Figure 4 This is a connection relationship diagram of the heat exchange module of the utility model.
[0030] In the figure: 1, U-shaped heat exchange tube 2, elbow 3, long fin 4, short fin 5, tube sheet 6, claw-type serrated notch. DETAILED DESCRIPTION
[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0034] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0035] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
[0038] like Figure 1 As shown, the utility model provides a high-efficiency frost-proof low-temperature heat exchanger, comprising: a tube sheet 5, fins and a heat exchange module; there are three tube sheets 5, which are relatively evenly distributed; a plurality of fins are evenly distributed in parallel between two adjacent tube sheets 5; at least one group of heat exchange modules is assembled between the three tube sheets 5; a plurality of claw-type serrated notches 6 are provided at the rear of the fins; the fins are connected and fixed to the heat exchange module through the claw-type serrated notches 6.
[0039] like Figure 4 As shown, there are 15 U-shaped heat exchange tubes 1 in five groups of heat exchange modules. The first tube of the first U-shaped heat exchange tube 1 of each group of heat exchange modules is the refrigerant inlet K1. The second tube of the first U-shaped heat exchange tube 1 is connected to the first tube of the second U-shaped heat exchange tube 1 through an elbow 2. The second tube of the second U-shaped heat exchange tube 1 is connected to the first tube of the third U-shaped heat exchange tube 1 through an elbow 2. The second tube of the third U-shaped heat exchange tube 1 is the refrigerant outlet K2. The refrigerant enters from the first tube refrigerant inlet K1 of the first U-shaped heat exchange tube 1 and flows out from the second tube refrigerant outlet K2 of the third U-shaped heat exchange tube 1, completing a heat exchange tube group cycle. The connection method of the second, third, fourth, and fifth heat exchange pipeline groups is the same as that of the first heat exchange pipeline group.
[0040] like Figure 1 As shown, the fins are corrugated fins, including: long fins 3 and short fins 4;
[0041] like Figure 1 As shown, the long fins 3 and the short fins 4 are arranged alternately.
[0042] like Figure 1 As shown, the short fins 4 are arranged at the lower part of the heat exchanger.
[0043] like Figure 1 As shown, the distance between the long fins 3 and the short fins 4 is 4 mm.
[0044] like Figure 2 , 3 As shown, a plurality of claw-type serrated notches 6 are added to the rear of the long fins 3 and the short fins 4. By installing the U-shaped heat exchange tube 1, the serrations of the claw-type serrated notches 6 are pressed down, so that the contact area between the fins and the heating tube is increased, thereby increasing the heat exchange efficiency between the fins and the heating tube during defrosting.
[0045] like Figure 2 As shown, the vertical spacing between the two claw-type serrated notches 6 is 60 mm.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A high-efficiency frost-proof low-temperature heat exchanger, characterized in that: The high-efficiency frost-proof low-temperature heat exchanger comprises: a tube sheet (5), fins and a heat exchange module; There are three tube sheets (5) which are relatively evenly distributed. A plurality of fins are evenly distributed in parallel between two adjacent tube sheets (5); At least one set of heat exchange modules is installed between the three tube sheets (5); The rear part of the fin is provided with a plurality of claw-like serrated notches (6); The fins are connected and fixed to the heat exchange module via claw-type sawtooth notches (6).
2. The high-efficiency frost-proof low-temperature heat exchanger according to claim 1 is characterized in that: The heat exchange module comprises: three U-shaped heat exchange tubes (1) and two elbows (2); the first tube of the first U-shaped heat exchange tube (1) is a refrigerant inlet K1, the second tube of the first U-shaped heat exchange tube (1) is connected to the first tube of the second U-shaped heat exchange tube (1) through the elbow (2), the second tube of the second U-shaped heat exchange tube (1) is connected to the first tube of the third U-shaped heat exchange tube (1) through the elbow (2), the second tube of the third U-shaped heat exchange tube (1) is a refrigerant outlet K2, the refrigerant enters from the first tube refrigerant inlet K1 of the first U-shaped heat exchange tube (1) and flows out from the second tube refrigerant outlet K2 of the third U-shaped heat exchange tube (1), completing a heat exchange tube group cycle.
3. The high-efficiency frost-proof low-temperature heat exchanger according to claim 1 is characterized in that: The fins are corrugated fins, comprising: long fins (3) and short fins (4); The long fins (3) and the short fins (4) are arranged alternately.
4. The high-efficiency frost-proof low-temperature heat exchanger according to claim 3 is characterized in that: The short fins (4) are arranged at the lower part of the heat exchanger.
5. The high-efficiency frost-proof low-temperature heat exchanger according to claim 3 is characterized in that: The distance between the long fins (3) and the short fins (4) is 2-6 mm.
6. The high-efficiency frost-proof low-temperature heat exchanger according to claim 3 is characterized in that: A plurality of claw-type serrated notches (6) are added to the rear of the long fins (3) and the short fins (4). By installing the U-shaped heat exchange tube (1), the serrations of the claw-type serrated notches (6) are pressed down, thereby increasing the contact area between the fins and the heating tube, thereby increasing the heat exchange efficiency between the fins and the heating tube during defrosting.
7. The high-efficiency frost-proof low-temperature heat exchanger according to claim 1 is characterized in that: The vertical distance between the two claw-like sawtooth notches (6) is 60 mm.