Refrigerating system evaporator and container

Abstract

The utility model relates to the technical field of container refrigeration, and discloses a refrigeration system evaporator. A conical air duct of a main air duct is provided with a large opening end and a small opening end; the small opening end is connected with the first end of the n-shaped air duct, and the second end of the n-shaped air duct is provided with an n-shaped air duct blocking plate. Wing plates are mounted on the two sides of the n-shaped air duct; the wind shield is located below the main air duct, after installation, a bottom air duct is formed between the wind shield and surrounding shelters, and the length direction of the wind shield is consistent with the length direction of the n-shaped air duct; a plurality of air outlet holes are formed in the two outer side edges of the wind shield in the length direction according to a preset mode; the heat exchange fins are divided into two groups and are respectively mounted between the wind shield and the wing plates on the two sides; the heat exchange mode is changed from a single and independent air outlet to a two-side path type, area type and air volume variable air outlet mode, uniform air outlet from the two side walls of the container is achieved, the structure is simple, installation is convenient and fast, the improvement cost is low, and the air outlet structure is suitable for containers of any specifications and suitable for transporting goods sensitive to temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of container refrigeration, in particular to an evaporator of a refrigeration system and a container. Background Art

[0002] The evaporator unit in a refrigeration system is one of the main components of the refrigeration system. Its primary function is to exchange heat between the condensed refrigerant and the ambient air. Typically, a sleeved fin evaporator is used in containers. This involves fins being sheathed over tubes, which are then mechanically or hydraulically expanded to tightly press against the tubes. The pipes are integrated with closely spaced reciprocating flow channels. The condensate exchanges heat with the incoming air through the channels, the pipes, and the fins on the pipes (which increase the heat dissipation area). The resulting airflow is relatively uniform in temperature, achieving a large amount of heat exchange between the condensate and the air in a relatively confined space. This makes it suitable for container transportation, where the full functionality of the refrigeration system must be maintained within a confined space.

[0003] However, in actual use, the air outlet is fixed at one end of the container and blows cold air toward the other end. Although the temperature of the blown air is relatively uniform, because the air outlet is located at the end of the container, the farther the cooled air is from the air outlet when it blows outward, the weaker the wind force is. In other words, the wind speed decreases with increasing distance. The lower the wind speed, the less heat exchange there is between the low-temperature air and the surrounding air and cargo, and the worse the cooling effect. At the same time, when the blown air flows in the sealed space, it mixes with the surrounding air and exchanges heat with the surrounding cargo, causing the wind temperature to increase with increasing distance. The higher the temperature of the cold air, the less heat exchange there is with the surrounding air and cargo. Therefore, the farther away from the air outlet, the higher the ambient temperature in the entire environment, and the temperature distribution in the space is uneven. In actual use, it is often the case that the cargo near the refrigeration system outlet is low in temperature or even frozen, but the cargo at the door farthest from the container outlet has already rotted. This is not suitable for temperature-sensitive fresh goods. Utility Model Content

[0004] The utility model aims to provide an evaporator for a refrigeration system, which is used to solve the technical problem that the temperature inside the container is uneven due to the existing evaporator device for container refrigeration.

[0005] The basic scheme provided by the present utility model is: a refrigeration system evaporator, including a main air duct, a wind shield and heat exchange fins; the main air duct includes a conical air duct and an "J"-shaped air duct; the conical air duct has a large mouth end and a small mouth end; the small mouth end is connected to the first end of the "J"-shaped air duct, and the second end of the "J"-shaped air duct is installed with an "J"-shaped air duct blocking plate; the "J"-shaped air duct has a structure with an "J" cross-section, a sealed upper part, an open lower part and wing plates installed on both sides; the wind shield is located below the main air duct, and after installation, a bottom air duct is formed between the wind shield and the surrounding obstructions, wherein the length direction of the wind shield is consistent with the length direction of the "J"-shaped air duct; the wind shield is provided with a plurality of air outlets on both outer sides along the length direction according to a preset method; the heat exchange fins are divided into two groups, which are respectively installed between the wind shield and the wing plates on both sides.

[0006] Furthermore, a conical air duct blocking plate with a plurality of holes is installed at the large opening end.

[0007] Furthermore, the cross-sectional area of ​​the first end of the S-shaped air duct is larger than the cross-sectional area of ​​the second end.

[0008] Furthermore, the wing panels on both sides are installed symmetrically.

[0009] Furthermore, the windshield is formed by connecting a plurality of plates.

[0010] Furthermore, the preset method is that air holes are symmetrically opened on both outer sides of the wind shield.

[0011] Furthermore, the preset method is that the cross-sectional area of ​​the air outlet located in the direction of the first end of the "J"-shaped air duct is larger than the cross-sectional area of ​​the air outlet located in the direction of the second end of the "J"-shaped air duct.

[0012] Furthermore, it also includes several fixed beams.

[0013] The present solution also provides a container, wherein the above-mentioned refrigeration system evaporator is installed on the top of the container, wherein the large end of the conical air duct is connected to the end of the container refrigeration unit, the X-shaped air duct extends from the small end of the conical air duct toward the container door, the two sides of the wind shield are in contact with the two side walls of the container, and a bottom air duct is formed between the wind shield and the conical air duct blocking plate, the X-shaped air duct blocking plate, and the top and two side walls of the container.

[0014] Furthermore, a ventilation T-slot is provided at the bottom of the container; the ventilation T-slot extends from the container door to the end of the container refrigeration unit to form a return air channel inside the container.

[0015] The working principle and advantages of the utility model are: through the structure of this scheme, the wind is guided from the large end of the conical air duct through the small end to the J-shaped air duct, and then flows out through the lower opening of the J-shaped air duct to the bottom air duct, and flows out from the several air outlet holes of the wind shield through the heat exchange fins.

[0016] Compared with the existing technology, this solution changes the heat exchange mode from a single, independent air outlet to a two-side path-type, area-type, and variable air volume air outlet mode. The air outlet position and air outlet area are greatly expanded. Through topological optimization, the length ratio of the conical air duct and the J-shaped air duct is reasonably set, the cross-sectional area change mode of the conical air duct and the J-shaped air duct in the length direction of the container, and the cross-sectional area change mode of the wind shield air outlet hole are adjusted. The air outlet uniformity of this solution can be adjusted. When installed in a container for use, it can achieve uniform air outlet from the two side walls of the container, ensure that the front and rear air outlet temperatures of the entire container are consistent, and ensure that all goods are cooled evenly; the path from the container air outlet to all the front and rear goods, and then the return air from the T-shaped air duct at the bottom of the container is shorter and more uniform; the overall structure of the device is simple, installation is convenient, and the modification cost is low. It is suitable for promotion and use in containers of any specifications. Using a uniform air outlet mode, it is suitable for transporting temperature-sensitive goods, especially temperature-sensitive fresh goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of an evaporator for a refrigeration system provided by an embodiment of the present utility model;

[0018] Figure 2 A front view of an evaporator of a refrigeration system (when installed on the top of a container) provided by an embodiment of the utility model;

[0019] Figure 3 This is a left side view (partial right side view) of a refrigeration system evaporator (when installed on the top of a container) provided by an embodiment of the utility model;

[0020] Figure 4 A top view of an evaporator of a refrigeration system provided by an embodiment of the utility model;

[0021] Figure 5 A schematic structural diagram of a tapered air duct provided in an embodiment of the present utility model;

[0022] Figure 6 A right side view of the tapered air duct provided by an embodiment of the present utility model;

[0023] Figure 7 A top view of a tapered air duct provided in an embodiment of the present utility model;

[0024] Figure 8 A schematic structural diagram of a tapered air duct baffle provided in an embodiment of the present utility model;

[0025] Figure 9 A schematic diagram of the structure of the X-shaped air duct provided in an embodiment of the utility model;

[0026] Figure 10A top view of the X-shaped air duct provided by an embodiment of the utility model;

[0027] Figure 11 A schematic diagram of the structure of the bottom air duct provided in an embodiment of the present utility model;

[0028] Figure 12 This is a rear view of a container provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0029] The following is a further detailed description through specific implementation methods:

[0030] The marks in the drawings of the specification include: main air duct 1, conical air duct 11, conical air duct blocking plate 12, I-shaped air duct 13, wing plate 131, I-shaped air duct blocking plate 14, heat exchange fin 2, pad 21, wind shield 3, air outlet 31, fixed beam 4, container body 5, ventilation T-slot 51, cargo 52, container side wall 53, and fan 6.

[0031] The embodiment is basically as shown in the attached Figure 1 、 Figure 2 、 Figure 3 and Figure 4 Shown: A refrigeration system evaporator includes a main air duct 1, a wind shield 3 and heat exchange fins 2.

[0032] The main air duct 1 includes a conical air duct 11 and an X-shaped air duct 13, and the length ratio is 1:40 or 1:20, etc. Figure 5 、 Figure 6 and Figure 7 As shown, the tapered air duct 11 has a large end and a small end, the length (vertical distance between the large end and the small end) is 250-300 mm, and the cross-sectional area of ​​the large end is 0.1 m 2 -0.2m 2 The cross-sectional area of ​​the small end is 0.02m 2 -0.04m 2 , adapted to the installation requirements inside conventional containers. Figure 8 As shown, the large end is fitted with a tapered duct plug 12 with several holes. The plug is configured based on the number and size of the fans installed. Typically, two fans are installed, and the opening for each fan is approximately 300mm x 150mm, providing good dimensional adaptability. After the large end is docked with the end of the container refrigeration unit, air from the fans at the end of the container refrigeration unit passes through the holes in the tapered duct plug, flowing from the large end of the tapered duct to the small end. The air is then concentrated by the cone, increasing its velocity, and then flows into the "X"-shaped duct.

[0033] The first end of the "X"-shaped air duct 13 is connected to the small end of the conical air duct, and the second end is equipped with an "X"-shaped air duct blocking plate 14 to block the channel, so that the wind stops flowing on this section. Figure 9 、 Figure 10 As shown, the cross-sectional structure of the "J"-shaped air duct 13 is a closed upper portion and an open lower portion, with wing plates 131 installed on both sides, which are fixed by screws or the like through the wing plates 131; the wing plates 131 on both sides can be installed symmetrically; the cross-sectional area of ​​the first end of the "J"-shaped air duct 13 is larger than that of the second end, and the cross-sectional area of ​​the large end is 0.02m 2 -0.04m 2 The cross-sectional area of ​​the small end is 0.01m 2 -0.015m 2 The top of the "J"-shaped air duct is close to the top wall of the container, and the lower wing plate 131 is parallel to the wall of the container. The height remains unchanged, and only the cross-sectional area is reduced in the length direction of the "J"-shaped air duct.

[0034] After the wind flows into the "J"-shaped air duct 13, it flows along the length direction. Since the cross-sectional area of ​​the "J"-shaped air duct 13 continues to decrease, the wind is further concentrated to increase the wind speed, solving the problem of the existing air outlet method that the farther away from the air outlet, the weaker the wind force is. At the same time, the wind flows through the opening at the bottom toward the extension direction of the wing plates 131 on both sides.

[0035] like Figure 4 and Figure 11 As shown, the windshield 3 is located below the main air duct 1 and below the fixed crossbeam 4, and is fixed to the fixed crossbeam 4 with fasteners such as rivets. After installation, a bottom air duct is formed between the windshield and the surrounding obstructions. For example, after installation in a container, the two sides of the windshield 3 are in contact with the container side walls 53, and a bottom air duct is formed between the windshield 3 and the conical air duct plug 12, the "X"-shaped air duct plug 14, the top and both side walls of the container. The length and width of the windshield 3 are compatible with the size of the main air duct 1 and the heat exchange fin 2, and the size of the container. It can cover the entire heat exchange fin 2 and be installed in an adaptable manner with the container to form a bottom air duct. The windshield 3 is formed by connecting several base plates. Because conventional whole steel plates do not have the required size for the windshield 3, they are spliced ​​and connected according to the width of the steel plates used. The width is usually 1.5m-2.2m, which can maximize the use of the steel plates and is easy to install.

[0036] The length of the windshield 3 aligns with the length of the "X"-shaped air duct 13. A number of air outlet holes 31 are pre-defined along the outer edges of the windshield 3, corresponding to the length of the "X"-shaped air duct. The air outlet holes 31 are positioned so that, after installation, they are 10-30 mm from the container sidewall 53. The total area of ​​the air outlet holes is determined by the fan air volume and outlet velocity, typically 1-2 m / s. The air outlet holes are symmetrically arranged, with a spacing of 40-80 mm. The holes are circular or waist-shaped, with a radius of 30-50 mm.

[0037] The preset method is that the air outlet holes are symmetrically opened on both outer sides of the windshield, and the cross-sectional area of ​​the air outlet holes located in the direction of the first end of the "J"-shaped air duct is larger than the cross-sectional area of ​​the air outlet holes located in the direction of the second end of the "J"-shaped air duct. The cross-sectional area decreases from large to small along the length direction, and the maximum cross-sectional area is 5000mm 2 , minimum 2000mm 2 The cross-sectional area variation was derived from simulation optimization and adjusted through actual testing. After the device was installed on the top of the container, air outlets were located on both sides of the container, close to the side walls. Air flowing from the two sides of the "J"-shaped air duct through these outlets flows downward along the container walls, and through the line-type air outlets, it achieves a uniform air supply along the line.

[0038] The heat exchange fins 2 are divided into two groups, which are respectively installed between the wind shield 3 and the wing plates 131 on both sides. They can be installed symmetrically. Double-fin or star-shaped fin aluminum alloy fin tube products can be selected, and the area size at least covers the unopened part of the wind shield 3 located below it.

[0039] like Figure 1 As shown, the container also includes several fixed crossbeams 4, primarily constructed of supporting steel members such as square tubes and channel steel. The wings 131 and spacers 2 extending outward from the sides of the "X"-shaped air duct 13 are secured to the upper lateral supports of the fixed crossbeams 4. The heat exchange fins 2 are placed directly above the lateral supports of the fixed crossbeams 4 and secured with clamps. The windshield 3 is located below the lateral supports of the fixed crossbeams 4 and secured with fasteners such as rivets. This secures the main air duct 1, heat exchange fins 2, and windshield 3 to the top of the container. The crossbeams are connected to the container's inner walls through welding and riveting.

[0040] As a result, the wind is guided along the length of the conical air duct and the "J"-shaped air duct, changing the independent, point-type air outlet mode into a line-type air outlet mode. The wind flows along the cross-sectional direction of the "J"-shaped air duct 13 while flowing downward from the lower opening. It is bent to both sides through the bottom wind shield 3 and flows to the air outlet of the wind shield 3. The line-type air supply is used to realize area-type air supply. At the same time, the air is gathered and the air volume is adjusted through the air outlet to realize uniform air supply.

[0041] In addition, the sizes of the air outlets of the two side wing panels 131, the two groups of heat exchange fins 2 and the wind shields 3 on both sides can be reasonably set according to the required air outlet on both sides, and an asymmetric method can be adopted to make the wind speed and air volume on both sides of the container compatible with the cooling requirements of the goods 52 on both sides of the container, so as to meet the different heat dissipation requirements of different goods 52 on both sides when different goods 52 are loaded on the same vehicle. The overall structure is more flexible and has a higher adaptability.

[0042] like Figure 2 and Figure 12As shown, this solution also provides a container with the aforementioned evaporator mounted on top. The tapered air duct 11 has its large end connected to the end of the container's refrigeration unit, and an "X"-shaped air duct 13 extends from the tapered air duct's small end toward the container door. The container can be a double-layered insulated container with a polyurethane interlayer. A ventilation T-slot 51 is provided at the bottom of the container; cargo 52 is placed above the T-slot 51. The ventilation T-slot 51 extends from the container door to the end of the container's refrigeration unit, forming a return air duct within the container.

[0043] The heat exchange fins 2 are wrapped into a closed rectangular space by the conical duct plug 12, the wind shield 3, the "J"-shaped duct plug 14, and the top and inner side walls of the container, thereby dividing the container interior into two spaces. The fan is located above the end of the container refrigeration unit, and draws air from the T-shaped support plate of the container at the bottom of the lower loading space to blow air to the upper evaporator space. The conical duct 11 is open at one end of the rectangular body, providing an outlet for the wind source through the large end, and then narrowing the area to guide the wind into the "J"-shaped duct 13. The "J"-shaped duct 13 is inserted into the upper part of the rectangular space to guide the wind through the rectangular body and blow it downward from the axis to both sides. The fins are located exactly in the direction of the wind flow on both sides of the axis. The heat exchange medium in the fins exchanges heat with the blown air. The cold air after heat exchange flows downward from the wind shield 3 outlets on both sides of the container along the container side walls to exchange heat with the cargo 52 in the container.

[0044] The present embodiment provides a refrigeration system evaporator and container, which change the heat exchange mode from a single, independent air outlet to a two-side path-type, area-type, and variable air volume air outlet mode. The heat exchange air outlets are on the two side walls of the container, and the air outlet position and area are expanded. The length ratio of the conical air duct and the "J"-shaped air duct is reasonably set through topological optimization, the cross-sectional area change mode of the conical air duct and the "J"-shaped air duct in the length direction of the container, and the cross-sectional area change mode of the air outlet hole of the bottom wind shield plate can adjust the air outlet uniformity of the air outlet mode of this scheme. When installed in the container for use, it can achieve uniform air outlet from the two side walls of the container, ensuring that the air outlet temperature of the entire container is consistent, and can make the path from the container outlet to all goods and then the return air from the T-shaped air duct at the bottom of the container shorter and more uniform. The overall structure of the device is simple, the installation is convenient, and the modification cost is low. It is suitable for promotion and use in containers of any specifications. The uniform air outlet mode is suitable for transporting temperature-sensitive goods, especially temperature-sensitive fresh goods.

[0045] The above description is merely an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. A person of ordinary skill in the art is aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, is able to obtain all existing technologies in the field, and has the ability to apply conventional experimental means before that date. A person of ordinary skill in the art can, under the guidance of this application, improve and implement the present scheme in combination with his or her own abilities. Some typical known structures or methods should not become an obstacle for a person of ordinary skill in the art to implement the present application. It should be pointed out that a person of ordinary skill in the art can make several variations and improvements without departing from the structure of the present invention. These should also be considered as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A refrigeration system evaporator, characterized in that: It includes a main air duct, a wind shield and heat exchange fins; the main air duct includes a conical air duct and an I-shaped air duct; the conical air duct has a large end and a small end; the small end is connected to the first end of the I-shaped air duct, and the second end of the I-shaped air duct is equipped with an I-shaped air duct blocking plate; the upper part of the I-shaped air duct is sealed, the lower part is open and wing plates are installed on both sides; the wind shield is located below the main air duct, and after installation, a bottom air duct is formed between the wind shield and the surrounding obstructions, wherein the length direction of the wind shield is consistent with the length direction of the I-shaped air duct; the two outer sides of the wind shield along the length direction are provided with a plurality of air outlets in a preset manner; the heat exchange fins are divided into two groups, which are respectively installed between the wind shield and the wing plates on both sides.

2. The evaporator of a refrigeration system according to claim 1, characterized in that: The large-mouth end is provided with a conical air duct blocking plate with a plurality of first holes.

3. The evaporator of a refrigeration system according to claim 1, characterized in that: The cross-sectional area of ​​the first end of the X-shaped air duct is larger than the cross-sectional area of ​​the second end.

4. The evaporator of a refrigeration system according to claim 1, characterized in that: The wing panels on both sides are installed symmetrically.

5. The evaporator of a refrigeration system according to claim 1, characterized in that: The windshield is formed by connecting a plurality of base plates.

6. The evaporator of a refrigeration system according to claim 1, characterized in that: The preset method is that the air holes are symmetrically opened on both outer sides of the wind shield.

7. The evaporator of a refrigeration system according to claim 1, characterized in that: The preset manner is that the cross-sectional area of ​​the air outlet holes located in the direction of the first end of the "J"-shaped air duct is larger than the cross-sectional area of ​​the air outlet holes located in the direction of the second end of the "J"-shaped air duct.

8. The evaporator of a refrigeration system according to claim 1, characterized in that: Also included are several fixed beams.

9. Container, characterized in that, A refrigeration system evaporator according to any one of claims 1 to 8 is installed on the top of the container, wherein the large end of the conical air duct is connected to the end of the container refrigeration unit, the I-shaped air duct extends from the small end of the conical air duct toward the container door, the two sides of the wind shield are in contact with the two side walls of the container, and a bottom air duct is formed between the wind shield and the conical air duct blocking plate, the I-shaped air duct blocking plate, the top and two side walls of the container.

10. The container according to claim 9, characterized in that: A ventilation T-slot is provided at the bottom of the container; the ventilation T-slot extends from the container door to the end of the container refrigeration unit to form a return air channel inside the container.

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