Heat preservation shell of refrigerating unit

Abstract

The utility model discloses a heat preservation shell of a refrigerating unit, and belongs to the technical field of refrigerating units for vehicles. The air conditioner mainly comprises a shell assembly, an evaporator containing cavity used for installing an evaporator is formed in the shell assembly, the internal volume of the evaporator containing cavity is decreased from bottom to top, air inlet channels used for being matched with a condenser are arranged on one side or two sides of the outer portion of the shell assembly, and the internal volume of the air inlet channels is increased from bottom to top. The evaporator containing cavity with the volume gradually reduced from bottom to top is additionally arranged in the shell assembly, and the air inlet channels with the volume gradually increased from bottom to top are arranged on the two sides of the shell assembly, so that the evaporator and the two sets of condensers can be reasonably arranged on the shell assembly, and two sets of refrigerating systems are arranged in the refrigerating unit; even if one set of refrigerating system breaks down, the other set of refrigerating system can continue to maintain the temperature in the compartment, and the refrigerating stability is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive refrigeration units, and more specifically, it relates to a refrigeration unit insulation shell. Background Technology

[0002] Vehicle refrigeration units are one of the core pieces of equipment in cold chain logistics. Their working principle is to circulate refrigerant in components such as evaporators, compressors, condensers, and expansion valves, continuously absorbing heat from inside the vehicle and releasing it outside, thereby reducing the temperature inside the vehicle and thus keeping the goods fresh and of good quality.

[0003] For example, Chinese patent CN214112225U discloses a top-mounted independent thermal management unit, including: an upper housing, a lower housing, a refrigeration system, and a heat dissipation system; the refrigeration system and the heat dissipation system are mounted on the lower housing; the refrigeration system and the heat dissipation system are connected; the heat dissipation system is connected to the heat dissipation circuit of the battery pack to form a circulation loop; the upper housing and the lower housing are detachably fixedly connected. This unit integrates the refrigeration system and the heat dissipation system of an electric vehicle into the upper and lower housings, achieving a high degree of integration, reducing the space required for component arrangement, and the highly integrated top-mounted independent thermal management unit facilitates inspection and maintenance. Furthermore, the connection between the refrigeration system and the heat dissipation system allows them to share some components, reducing production costs.

[0004] However, the above-mentioned equipment is not suitable for semi-trailer refrigerated trucks. The cargo box of semi-trailer refrigerated trucks has height restrictions. If the refrigeration system is set on the top of the cargo box, it will hinder the cargo capacity of the cargo box. Therefore, semi-trailer refrigerated trucks install the refrigeration unit at the front of the cargo box. Secondly, in order to ensure the effective turning distance of the truck head, the installation space and internal space of the refrigeration unit of the semi-trailer refrigerated truck are limited. Usually, only one refrigeration system can be installed in the refrigeration unit. When the refrigeration system fails, it is impossible to guarantee that the refrigeration temperature inside the cargo box remains constant. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a refrigeration unit insulation shell. An evaporator receiving cavity with a volume that gradually decreases from bottom to top is added inside the shell assembly. Air inlet channels with a volume that gradually increases from bottom to top are provided on both sides of the shell assembly. This allows the evaporator and two sets of condensers to be reasonably arranged on the shell assembly, realizing the installation of two sets of refrigeration systems in the refrigeration unit. Even if one set of refrigeration systems fails, the other set can continue to maintain the temperature inside the car, which greatly improves the refrigeration stability.

[0006] The refrigerating unit heat preservation shell comprises a shell assembly, an evaporator accommodating cavity for installing an evaporator is arranged inside the shell assembly, the internal volume of the evaporator accommodating cavity decreases from bottom to top, and an air inlet channel for cooperating with a condenser is arranged on one side or both sides of the shell assembly.

[0007] Preferably, a fan maintenance opening is arranged in the upper portion of the shell assembly.

[0008] Preferably, the shell assembly comprises an inner shell and an outer shell, the inner shell is fixedly connected with the outer shell, and a heat preservation layer is arranged between the inner shell and the outer shell, and a plurality of bottom support tables are arranged on the bottom of the outer shell.

[0009] Preferably, the evaporator accommodating cavity is arranged in the inner shell, the evaporator accommodating cavity comprises a bottom plate, the bottom of the bottom plate is in abutment with the bottom support tables, an inner vertical side plate is arranged inside the bottom plate, an installation plate is arranged above the inner vertical side plate, the fan maintenance opening is arranged in the middle portion of the installation plate, inner side plates are arranged on both sides of the bottom plate, and a slope plate assembly is arranged between the inner vertical side plate and the inner side plates, and the upper end of the slope plate assembly is arranged in an inclined manner towards the outside of the evaporator accommodating cavity.

[0010] Preferably, the bottom plate is arranged in an inclined manner towards the upper side.

[0011] Preferably, the slope plate assembly comprises a lower slope plate, the upper end of the lower slope plate is arranged in an inclined manner towards the outside of the evaporator accommodating cavity, one side of the lower slope plate is fixedly connected with the inner side plate, the other side of the lower slope plate is fixedly connected with the inner vertical side plate through a lower transition plate, an upper slope plate is arranged on the upper end of the lower slope plate, one side of the upper slope plate is connected with the installation plate, and the other side and the upper end of the upper slope plate are connected with the outer end surface of the inner shell.

[0012] Preferably, an outer vertical side plate is arranged on the side of the outer shell away from the inner shell, the outer vertical side plate is arranged below the fan maintenance opening, the outer vertical side plate corresponds to the inner vertical side plate, the air inlet channel comprises an upper transition plate and an outer slope plate arranged in a vertical manner, one side of the upper transition plate is connected with the installation plate, the other side of the upper transition plate is connected with the side end surface of the outer shell, the outer slope plate has a structure of being wide at the top and narrow at the bottom, the bottom of the outer slope plate is arranged in an inclined manner away from the inner shell, one side of the outer slope plate is connected with the outer vertical side plate through an outer slope plate two, and the other side of the outer slope plate is connected with the end surface of the outer shell through a connecting plate.

[0013] Preferably, the upper transition plate is an arc-shaped plate, and the upper transition plate is arranged in a curved manner towards the side of the inner shell.

[0014] Compared with the prior art, the refrigerating unit heat preservation shell has the following beneficial effects:

[0015] 1. The shell assembly is additionally provided with an evaporator containing cavity with gradually decreasing volume from bottom to top, and the bottom plate at the bottom of the evaporator containing cavity is arranged upwardly inclined, so that the evaporator is installed obliquely, and after the evaporator is installed obliquely, the evaporator heat exchange air duct is formed between the evaporator and the inner wall of the evaporator containing cavity, and the evaporator heat exchange air duct gradually increases in volume from bottom to top, and the evaporator fan is arranged above the evaporator containing cavity, and when the evaporator fan is started, the evaporator fan forms a local negative pressure above the evaporator, and the air enters from the gap between the pipes in the evaporator, and since the volume of the evaporator heat exchange air duct is smaller and the negative pressure is relatively larger as it is closer to the bottom, the air inlet speed is also faster, so that the air inlet of the evaporator is uniform through the evaporator heat exchange air duct with gradually increasing volume from bottom to top, so that the overall heat exchange of the evaporator is more uniform.

[0016] 2. The shell assembly is additionally provided with an evaporator containing cavity with gradually decreasing volume from bottom to top, and the bottom plate at the bottom of the evaporator containing cavity is arranged upwardly inclined, so that the evaporator is installed obliquely, and after the evaporator is installed obliquely, the evaporator heat exchange air duct is formed between the evaporator and the inner wall of the evaporator containing cavity, and the evaporator heat exchange air duct gradually increases in volume from bottom to top, and the evaporator fan is arranged above the evaporator containing cavity, and when the evaporator fan is started, the evaporator fan forms a local negative pressure above the evaporator, and the air enters from the gap between the pipes in the evaporator, and since the volume of the evaporator heat exchange air duct is smaller and the negative pressure is relatively larger as it is closer to the bottom, the air inlet speed is also faster, so that the air inlet of the evaporator is uniform through the evaporator heat exchange air duct with gradually increasing volume from bottom to top, so that the overall heat exchange of the evaporator is more uniform.

[0017] 3. The evaporator and the two groups of condensers can be reasonably arranged on the shell assembly, so that the structure of the refrigerating unit is more compact, and two groups of refrigerating systems are arranged in the refrigerating unit, so that even if one group of refrigerating systems fails, the other group can continue to maintain the temperature in the vehicle compartment, and the refrigerating stability is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front structure schematic view of the utility model;

[0019] Figure 2 It is a back structure schematic view of the utility model;

[0020] Figure 3 It is a split schematic view of the utility model;

[0021] Figure 4 It is a front view of the utility model;

[0022] Figure 5 It is a right view of the utility model;

[0023] Figure 6 It is a top view of the utility model;

[0024] Figure 7 It is a front use state reference view of the utility model;

[0025] Figure 8 It is a back use state reference view of the utility model.

[0026] In the figure, 1, shell assembly; 101, inner shell; 102, outer shell; 103, bottom support table; 2, evaporator containing cavity; 201, inner side plate; 202, lower inclined plate; 203, inner vertical side plate; 204, bottom plate; 205, lower transition plate; 206, upper inclined plate; 3, fan access hole; 301, mounting plate; 4, outer inclined plate; 5, upper transition plate; 6, connecting plate; 7, outer inclined plate two; 8, outer vertical side plate; 9, condenser; 10, evaporator. DETAILED DESCRIPTION

[0027] The utility model will be further described below in conjunction with the drawings:

[0028] The orientation terms involved in the paragraphs of detailed description are only for the convenience of the person skilled in the art to understand the technical solutions recorded in the present application according to the visual orientation shown in the drawings. Except for explicit provisions and limitations, the terms "set", "install", "connect" and the like should be understood broadly. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] As shown in the figure, Figures 1 to 8 The refrigeration unit insulation shell comprises a shell assembly 1, as shown in the figure, Figure 3 The shell assembly 1 comprises an inner shell 101 and an outer shell 102, the inner shell 101 is fixedly connected with the outer shell 102, and a heat preservation layer is arranged between the inner shell 101 and the outer shell 102. By arranging the heat preservation layer, heat loss of the evaporator 10 and the condenser 9 during heat exchange can be avoided, so that the refrigeration effect is ensured. The shell assembly 1 is internally provided with an evaporator containing cavity 2 for installing the evaporator 10, and the internal volume of the evaporator containing cavity 2 gradually decreases from bottom to top. As shown in the figure, Figure 7 By arranging the evaporator containing cavity 2 with gradually decreasing volume upward, the evaporator 10 can be installed obliquely. At this time, an evaporator heat exchange air duct is formed between the side of the evaporator 10 close to the evaporator containing cavity 2 and the inner wall of the evaporator containing cavity 2, and the volume of the evaporator heat exchange air duct gradually increases from bottom to top. When installing, the evaporator fan is arranged above the evaporator containing cavity 2 through a sealing plate. By starting the evaporator fan and reversing the evaporator fan, positive pressure or negative pressure can be formed in the upper part of the evaporator heat exchange air duct.

[0030] When the evaporator fan forms a local negative pressure in the upper part of the evaporator heat exchange air duct, air enters from the gap between the pipes in the evaporator 10, and then flows out from the upper part of the evaporator heat exchange air duct. Since the evaporator 10 is designed to be inclined, and the volume of the evaporator heat exchange air duct gradually increases from bottom to top, the evaporator 10 can uniformly intake air from bottom to top, which is beneficial to the uniform distribution of the evaporator air volume, and thus the overall heat exchange of the evaporator 10 is more uniform. Conversely, air enters from the evaporator fan, and finally discharges from the gap between the pipes in the evaporator 10.

[0031] AsFigure 2 As shown, one or both sides of the shell assembly 1 is provided with an air inlet channel for cooperating with the condenser, the air inlet channel gradually increases in volume from bottom to top. Figure 8 As shown, the present embodiment is used in cooperation with the condenser 9, the condenser 9 is arc-shaped structure, the condenser 9 is arranged outside the air inlet channel and surrounds the air inlet channel, the condenser fan is arranged above the air inlet channel, the condenser fan is started to form a local negative pressure above the air inlet channel, the air inlet channel gradually increases in volume from bottom to top, and the condenser 9 uniformly intakes air from bottom to top, so that the heat exchange of the condenser 9 is more uniform, and the principle is the same as above.

[0032] The upper part of the shell assembly 1 is provided with a fan maintenance opening 3, which can maintain and replace the evaporator fan outside the car compartment, avoiding the embarrassment that the operator needs to enter the car compartment and unload the car goods for maintenance in the prior art.

[0033] In the present embodiment, as shown, Figure 5 The bottom of the outer shell 102 is inclined to the upper side away from the evaporator cavity 2, which provides an inclined basis for the inclined installation of the evaporator 10; the bottom of the outer shell 102 is provided with a plurality of protruding bottom support tables 103, which provide sufficient support strength for the inner shell 101, and the bottom support table 103 can be used as an installation support point of the evaporator 10, facilitating the fixed installation of the evaporator 10, so that the installation of the evaporator 10 is more reliable.

[0034] As shown, Figure 3 The evaporator cavity 2 is arranged in the inner shell 101, specifically, the evaporator cavity 2 includes a bottom plate 204, the bottom of the bottom plate 204 abuts against the bottom support table 103, the inside of the bottom plate 204 is provided with an inner vertical side plate 203, the upper side of the inner vertical side plate 203 is provided with a mounting plate 301, the fan maintenance opening 3 is arranged in the middle of the mounting plate 301, and the two sides of the bottom plate 204 are respectively provided with inner side plates 201, in the present embodiment, the inner side plates 201 and the inner vertical side plates 203 are both arranged perpendicular to the horizontal plane, and the inner vertical side plate 203 and the inner side plate 201 are provided with a slope plate assembly, the upper end of the slope plate assembly is inclined to the outside of the evaporator cavity 2, so that the volume of the upper end of the evaporator cavity 2 gradually decreases.

[0035] The inside of the bottom plate 204 is inclined to the upper side, the bottom of the evaporator 10 is fixedly connected with the bottom plate 204, and the evaporator 10 can adopt a conventional rectangular evaporator, in the present embodiment, the inclination angle of the bottom plate 204 is 10-30°, so that the evaporator 10 is synchronously inclined after installation, and it should be noted that the upper side of the evaporator 10 after installation should not exceed the outer end surface of the inner shell 101.

[0036] As shown, Figure 1As shown, the inclined plate assembly includes a lower inclined plate 202, the upper end of the lower inclined plate 202 is inclinedly arranged towards the outside of the evaporator accommodating cavity 2, one side of the lower inclined plate 202 is fixedly connected with the inner side plate 201, the other side of the lower inclined plate 202 is fixedly connected with the inner vertical side plate 203 through a lower transition plate 205, the lower inclined plate 202 can also be directly fixedly connected with the inner vertical side plate 203, the upper end of the lower inclined plate 202 is provided with an upper inclined plate 206, one side of the upper inclined plate 206 is connected with the mounting plate 301, and the other side and the upper end of the upper inclined plate 206 are connected with the outer end surface of the inner shell 101, the upper inclined plate 206 can be a flat plate or an arc-shaped plate, and the upper inclined plate 206 is used for further reducing the volume of the upper portion of the evaporator accommodating cavity 2.

[0037] As shown in the figure, Figure 2 As shown, the outer shell 102 is similar in shape to the inner shell 101, the side, away from the inner shell 101, of the outer shell 102 is provided with an outer vertical side plate 8, the outer vertical side plate 8 is arranged below the fan maintenance opening 3, the outer vertical side plate 8 corresponds to the inner vertical side plate 203, and the air inlet channel comprises an upper transition plate 5 and an outer inclined plate 4 arranged in a stacked mode; one side of the upper transition plate 5 is connected with the mounting plate 301, and the other side of the upper transition plate 5 is connected with the side end surface of the outer shell 102; the outer inclined plate 4 has a structure of being wide at the upper portion and narrow at the lower portion, and the bottom portion of the outer inclined plate 4 is arranged to be inclined towards the side, away from the inner shell 101; in the embodiment, the outer inclined plate 4 is arranged in parallel with the lower inclined plate 202, one side of the outer inclined plate 4 is connected with the outer vertical side plate 8 through an outer inclined plate two 7, and the other side of the outer inclined plate 4 is connected with the end surface of the outer shell 102 through a connecting plate 6.

[0038] The upper transition plate 5 can be a flat plate or an arc-shaped plate, and the upper transition plate 5 is preferably an arc-shaped plate, and the upper transition plate 5 is arranged to be curved towards the inner shell 101.

[0039] During installation, the condenser fan is fixedly connected with the upper transition plate 5 through a support.

[0040] In use, the shell assembly 1 is fixedly arranged above the refrigerating unit, the evaporator 10 is arranged at the bottom of the evaporator accommodating cavity 2, and the bottom plate 204 is arranged to be inclined, so that the evaporator 10 is also arranged to be inclined; the evaporator fan is arranged above the evaporator 10, and the evaporator fan is arranged to face the evaporator heat exchange air duct formed between the evaporator 10 and the evaporator accommodating cavity 2; at this time, the evaporator heat exchange air duct is from the lower portion to the upper portion, and the internal volume gradually increases; when the evaporator fan is started, the evaporator fan forms a local negative pressure above the evaporator 10, air enters from the gap between the pipelines in the evaporator 10, the volume of the evaporator heat exchange air duct is smaller and the negative pressure is relatively larger as being closer to the lower portion, so the air inlet speed is faster, and the uniform air inlet of the evaporator 10 is realized, and the overall heat exchange of the evaporator 10 is more uniform.

[0041] Similarly, the condenser 9 is installed outside the air inlet channel and surrounds the air inlet channel. When the condenser fan is started, the condenser fan forms a local negative pressure above the air inlet channel. The internal volume of the air inlet channel gradually increases from bottom to top. The air enters the gap between the fins of the condenser 9. The further down, the greater the air pressure and the faster the air inlet speed. The principle is the same as above, so that the condenser 9 uniformly inhales air from bottom to top.

[0042] Finally, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. The description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A hermetic shell for a refrigeration unit, comprising a shell assembly (1), characterized in that: The shell assembly (1) is internally provided with an evaporator accommodating cavity (2) for installing an evaporator, the evaporator accommodating cavity (2) is smaller in internal volume from bottom to top, and one side or both sides of the shell assembly (1) is provided with an air inlet channel for cooperating with a condenser, the air inlet channel is larger in internal volume from bottom to top.

2. The refrigeration unit insulation shell of claim 1, wherein: An upper portion of the shell assembly (1) is provided with a fan maintenance opening (3).

3. The refrigeration unit insulation shell of claim 2, wherein: The shell assembly (1) comprises an inner shell (101) and an outer shell (102), the inner shell (101) is fixedly connected with the outer shell (102), and a heat preservation layer is arranged between the inner shell (101) and the outer shell (102), and the bottom of the outer shell (102) is provided with a plurality of protruding bottom support tables (103).

4. The refrigeration unit insulation shell of claim 3, wherein: The evaporator accommodating cavity (2) is arranged in the inner shell (101), the evaporator accommodating cavity (2) comprises a bottom plate (204), the bottom of the bottom plate (204) abuts against the bottom support table (103), the inside of the bottom plate (204) is provided with an inner vertical side plate (203), an installation plate (301) is arranged above the inner vertical side plate (203), the fan maintenance opening (3) is arranged in the middle of the installation plate (301), and the two sides of the bottom plate (204) are respectively provided with inner side plates (201), an inclined plate assembly is arranged between the inner vertical side plate (203) and the inner side plate (201), and the upper end of the inclined plate assembly is arranged in an inclined manner towards the outside of the evaporator accommodating cavity (2).

5. The refrigeration unit insulation shell of claim 4, wherein: The inside of the bottom plate (204) is arranged in an inclined manner towards the upper side.

6. The refrigeration unit insulation shell of claim 4, wherein: The inclined plate assembly comprises a lower inclined plate (202), the upper end of the lower inclined plate (202) is arranged in an inclined manner towards the outside of the evaporator accommodating cavity (2), one side of the lower inclined plate (202) is fixedly connected with the inner side plate (201), the other side of the lower inclined plate (202) is fixedly connected with the inner vertical side plate (203) through a lower transition plate (205), and the upper end of the lower inclined plate (202) is provided with an upper inclined plate (206), one side of the upper inclined plate (206) is connected with the installation plate (301), and the other side and the upper end of the upper inclined plate (206) are connected with the outer end surface of the inner shell (101).

7. The refrigeration unit insulation shell of claim 4, wherein: The side, away from the inner shell (101), of the outer shell (102) is provided with an outer vertical side plate (8), the outer vertical side plate (8) is arranged below the fan maintenance opening (3), the outer vertical side plate (8) corresponds to the inner vertical side plate (203), the air inlet channel comprises an upper transition plate (5) and an outer inclined plate (4) arranged in a vertical manner, one side of the upper transition plate (5) is connected with the installation plate (301), the other side of the upper transition plate (5) is connected with the side end surface of the outer shell (102), the outer inclined plate (4) has a structure of being wide at the upper portion and narrow at the lower portion, the bottom of the outer inclined plate (4) is arranged in an inclined manner away from the inner shell (101), one side of the outer inclined plate (4) is connected with the outer vertical side plate (8) through an outer inclined plate two (7), and the other side of the outer inclined plate (4) is connected with the end surface of the outer shell (102) through a connecting plate (6).

8. The refrigeration unit insulation shell of claim 7, wherein: The upper transition plate (5) is an arc-shaped plate, and the upper transition plate (5) is arranged in a curved manner towards the side of the inner shell (101).

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