Refrigerator car

Abstract

The utility model belongs to the technical field of refrigerator cars, and discloses a refrigerator car which comprises a chassis, a refrigerator compartment, a refrigerating unit and a plurality of evaporating units, the refrigerator compartment is located above the chassis, and the refrigerator compartment can abut against and be far away from the chassis in the height direction. The refrigerating unit is installed below the chassis and comprises a compressor and a condenser. The multiple evaporation units are installed on the top in the refrigerator compartment and evenly distributed in the length direction of the refrigerator compartment, the refrigerating unit is communicated with all the evaporation units through a pipeline system, each evaporation unit comprises an expansion valve and an evaporator, and the compressor, the condenser, the expansion valve and the evaporator are sequentially communicated in a circulating mode. The refrigerator car overcomes the disadvantage that the air supply distance of a refrigerator compartment is too large, so that the refrigeration temperature field in the compartment is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerated trucks, in particular to a refrigerated truck. Background Art

[0002] With the increase in civil aviation passenger transportation business, it is necessary for aviation food refrigerated trucks to frequently travel between airports and catering stations. The characteristics of the working area of civil aviation equipment, such as fixed working area, short travel distance, and strong working regularity, determine the strong feasibility of using new energy airport equipment. Aviation food refrigerated trucks generally adopt an operation mode of loading goods at the rear of the carriage and unloading from the front after lifting the carriage body. The cargo storage and turnover channels run through the front and rear parts of the carriage body, and the deployment of each unit of the refrigeration unit needs to be considered specifically.

[0003] Most of the existing refrigerated trucks fix the evaporator on the side wall at the front end of the carriage. Due to the long box body and single refrigeration point, the temperature at the front end of the carriage near the refrigeration point is relatively low, and the temperature at the rear end of the carriage far from the refrigeration point is relatively high. The temperature distribution in the refrigerated carriage is uneven, which affects the refrigeration effect and reduces the refrigeration quality.

[0004] Therefore, there is an urgent need for a refrigerated truck to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a refrigerated truck that can make the refrigeration temperature field in the carriage more uniform.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Provide a refrigerated truck, including:

[0008] A chassis and a refrigerated carriage, the refrigerated carriage is located above the chassis, and the refrigerated carriage can abut against and move away from the chassis in the height direction;

[0009] A refrigeration unit, the refrigeration unit is installed below the chassis, and the refrigeration unit includes a compressor and a condenser;

[0010] Multiple evaporation units, multiple evaporation units are all installed on the top inside the refrigerated carriage, and multiple evaporation units are evenly distributed in the length direction of the refrigerated carriage. The refrigeration unit is communicated with all the evaporation units through a pipeline system. The evaporation unit includes an expansion valve and an evaporator, and the compressor, the condenser, the expansion valve and the evaporator are connected in series in sequence.

[0011] As an alternative solution for a refrigerated truck, the refrigerated truck further includes a defrosting unit, the defrosting unit includes a defrosting valve and a first connecting pipe, the first connecting pipe is communicated with the liquid outlet of the compressor and the liquid inlet of the evaporator, and the defrosting valve is connected to the first connecting pipe.

[0012] As an alternative solution for a refrigerated truck, the refrigeration unit further includes a first separator, and the first separator is communicated between the compressor and the evaporator.

[0013] As an alternative solution for a refrigerated truck, the refrigeration unit further includes a second separator, and the second separator is communicated between the compressor and the condenser.

[0014] As an alternative solution for a refrigerated truck, the refrigeration unit further includes a refrigeration valve, and the refrigeration valve is arranged on the pipeline communicating the second separator and the condenser.

[0015] As an alternative solution for a refrigerated truck, the refrigeration unit further includes a first fan, and the first fan is arranged facing the condenser.

[0016] As an alternative solution for a refrigerated truck, the refrigeration unit further includes a liquid storage device, and the liquid storage device is communicated between the condenser and the expansion valve.

[0017] As an alternative solution for a refrigerated truck, the refrigeration unit further includes a filtering device, and the filtering device is communicated between the condenser and the expansion valve.

[0018] As an alternative solution for a refrigerated truck, the filtering device further includes a sight glass.

[0019] As an alternative solution for a refrigerated truck, the evaporation unit further includes a second fan, and the second fan is arranged facing the evaporator.

[0020] Advantages of the present utility model:

[0021] The present utility model provides a refrigerated truck, in which a plurality of evaporation units are installed on the top inside the refrigerated compartment, and the plurality of evaporation units are evenly distributed in the length direction of the refrigerated compartment, which can reduce the air supply distance in the length direction in the narrow refrigerated compartment, avoid the problem of different air supply distances at different positions in the refrigerated compartment caused by setting a single evaporator, and further avoid the problem of uneven temperature in the compartment, making the refrigeration temperature field in the refrigerated compartment more uniform. The refrigerated truck integrates and installs the refrigeration unit under the chassis, which can not only save the space above the chassis, reserve space for the refrigerated compartment, expand the storage capacity of the refrigerated compartment, but also reduce the obstacles on the loading and unloading path of the refrigerated truck, ensure the smooth turnover of the loaded and unloaded items, and improve the turnover efficiency. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the refrigerated truck provided by the present utility model;

[0023] Figure 2 is a system diagram of the refrigeration unit of the refrigerated truck provided by the present utility model;

[0024] Figure 3 is a system diagram of the evaporation unit of the refrigerated truck provided by the present utility model.

[0025] In the figure:

[0026] 1, chassis; 2, refrigerated compartment; 3, cab; 4, wheels;

[0027] 100, refrigeration unit; 101, compressor; 102, condenser; 103, first separator; 104, second separator; 105, refrigeration valve; 106, first fan; 107, liquid storage device; 108, filtering device; 109, pressure regulating valve; 110, low-pressure control switch; 111, high-pressure control switch; 112, check valve; 113, pressure relief valve;

[0028] 200, evaporation unit; 201, expansion valve; 202, evaporator; 203, second fan;

[0029] 300, pipeline system;

[0030] 400, defrosting unit; 401, defrosting valve; 402, first connecting pipe; 403, second connecting pipe; 404, one-way valve. Specific embodiments

[0031] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] As Figures 1 to 3 shown, the refrigerated truck of this embodiment includes a chassis 1, a refrigerated compartment 2, a cab 3, wheels 4 and a lifting support frame (not shown in the figure). The cab 3 is connected to the front end of the chassis 1, the refrigerated compartment 2 is located above the chassis 1, the lifting support frame is connected between the chassis 1 and the refrigerated compartment 2, and the lifting support frame can support the refrigerated compartment 2 to abut against and move away from the chassis 1 in the height direction, and the height direction is the direction perpendicular to the chassis 1 ( Figure 1 the X direction in the figure), that is, the refrigerated compartment 2 can move up and down on the chassis 1. When the refrigerated compartment 2 needs to be loaded, the lifting support frame descends so that the refrigerated compartment 2 abuts against the chassis 1. At this time, the refrigerated compartment 2 drops to the lowest point, reducing the lifting height of the goods during loading; when the refrigerated compartment 2 needs to be unloaded, the lifting support frame raises the height of the refrigerated compartment 2 so that the height of the refrigerated compartment 2 is higher than the height of the cab 3, thereby preventing the cab 3 from obstructing the unloading of goods. A plurality of wheels 4 are provided, and the plurality of wheels 4 are connected below the chassis 1 or the cab 3 for supporting and driving the refrigerated truck. A certain height is reserved below the chassis 1 to prevent the chassis 1 from being knocked and worn when passing through bumpy or pitted roads.

[0036] The refrigerated truck further includes a refrigeration unit 100 and a plurality of evaporator units 200. Through reasonable shape and size design, the refrigeration unit 100 is integrally installed below the chassis 1. Among them, the refrigeration unit 100 at least includes a compressor 101 and a condenser 102. The plurality of evaporator units 200 are all installed on the top inside the refrigerated compartment 2, and the plurality of evaporator units 200 are evenly distributed in the length direction of the refrigerated compartment 2, where the length direction is the forward direction of the refrigerated truck ( Figure 1in the Y direction). The refrigeration unit 100 communicates with all the evaporation units 200 through the pipeline system 300. The evaporation unit 200 includes an expansion valve 201 and an evaporator 202. The compressor 101, the condenser 102, the expansion valve 201, and the evaporator 202 are connected in sequence for circulation.

[0037] Based on the above design, in the refrigerated truck provided in this embodiment, a plurality of evaporation units 200 are installed on the top inside the refrigerated compartment 2, and the plurality of evaporation units 200 are evenly distributed in the length direction of the refrigerated compartment 2, which can shorten the air supply distance in the length direction inside the narrow refrigerated compartment 2, avoiding the problem of different air supply distances at different positions inside the refrigerated compartment 2 caused by setting a single evaporator, and further avoiding the uneven temperature inside the compartment, making the refrigeration temperature field inside the refrigerated compartment 2 more uniform. The refrigerated truck integrally installs the refrigeration unit 100 under the chassis 1, which can not only save the space above the chassis 1, reserve enough space for the refrigerated compartment 2, expand the storage capacity of the refrigerated compartment 2, but also reduce the obstacles on the loading and unloading path of the refrigerated truck, ensure the smooth turnover of loading and unloading goods, and improve the turnover efficiency.

[0038] It should be noted that since the refrigerated compartment 2 needs to be lifted and moved, the distance between the refrigeration unit 100 and the evaporation unit 200 will also change. Therefore, the pipeline system 300 is set as a plurality of hoses, and the pipeline system 300 is connected to the lifting support frame, so that the hoses can change the bending angle with the deformation of the lifting support frame, thereby ensuring the flexible bending of the pipeline system 300 and extending the service life of the pipeline system 300.

[0039] When the refrigeration unit 100 and the evaporation unit 200 are working, the compressor 101 sucks in the low-temperature and low-pressure refrigerant gas from the evaporator 202, compresses it into a high-temperature and high-pressure gas, and then flows into the core body of the condenser 102. The refrigerant releases heat to the ambient air and condenses into a liquid with a certain degree of subcooling; the refrigerant liquid passes through the expansion valve 201, is throttled and depressurized, and then enters the core body of the evaporator 202; the low-temperature and low-pressure refrigerant liquid continuously vaporizes and evaporates in the core body of the evaporator 202, absorbing the heat inside the insulation box to meet the temperature requirements of the insulation box body.

[0040] Preferably, the refrigeration unit 100 includes a first fan 106, and the first fan 106 is arranged facing the condenser 102, which can blow air to the condenser 102, accelerate the air flow speed on the surface of the core body of the condenser 102, improve the heat exchange efficiency between the refrigerant in the core body of the condenser 102 and the external air, and further improve the cooling efficiency of the refrigeration unit 100.

[0041] Preferably, the evaporation unit 200 includes a second fan 203. The second fan 203 is arranged facing the evaporator 202 and can blow air towards the evaporator 202, accelerating the air flow velocity on the surface of the core of the evaporator 202, improving the heat exchange efficiency between the refrigerant in the core of the evaporator 202 and the air in the refrigerated compartment 2, and ensuring the temperature stability in the refrigerated compartment 2.

[0042] Furthermore, the refrigeration unit 100 further includes a first separator 103. The first separator 103 is connected between the evaporator 202 and the compressor 101. The refrigerant flowing out from the evaporator 202 enters the first separator 103. The first separator 103 is a gas-liquid separator, which can separate the refrigerant gas and liquid, enabling the refrigerant gas to continue flowing towards the compressor 101.

[0043] Optionally, the refrigeration unit 100 further includes a pressure regulating valve 109 and a low-pressure control switch 110. The pressure regulating valve 109 and the low-pressure control switch 110 are connected between the evaporator 202 and the compressor 101. Along the refrigerant flow direction, the first separator 103, the pressure regulating valve 109, and the low-pressure control switch 110 are connected in sequence. The pressure regulating valve 109 is used to adjust the pressure of the refrigerant gas flowing out from the first separator 103, so that the refrigerant pressure can be within a predetermined pressure range. When the refrigerant pressure meets the preset pressure range, the low-pressure control switch 110 is turned on to allow the refrigerant gas to enter the compressor 101.

[0044] Furthermore, the refrigeration unit 100 further includes a second separator 104. The second separator 104 is connected between the compressor 101 and the condenser 102. The second separator 104 is an oil separator. The second separator 104 is used to separate the high-temperature and high-pressure refrigerant gas and lubricating oil flowing out from the compressor 101, enabling the refrigerant gas to enter the condenser 102, and the separated lubricating oil can return to the first separator 103 to maintain the good lubrication and sealing performance of the first separator 103.

[0045] Optionally, the refrigeration unit 100 further includes a high-pressure control switch 111. The high-pressure control switch 111 is arranged on the pipeline connecting the liquid outlet of the compressor 101 and the liquid inlet of the second separator 104 to prevent damage to the refrigeration unit 100 caused by excessive refrigerant pressure.

[0046] Optionally, the refrigeration unit 100 further includes a refrigeration valve 105. The refrigeration valve 105 is arranged on the pipeline connecting the second separator 104 and the condenser 102, and is used to control the opening and closing of the passage between the second separator 104 and the condenser 102.

[0047] Furthermore, the refrigeration unit 100 further includes a liquid storage device 107, which is connected between the condenser 102 and the expansion valve 201 and is used to store the liquid component in the refrigerant. This helps to reduce the load on the condenser 102 and prevent excessive accumulation of condensate in the condenser 102, thus affecting the heat transfer effect of the condenser 102. In addition, the liquid storage device 107 can also adjust the supply amount of the refrigerant according to the change in the load of the evaporator 202 to ensure that the supply amount of the refrigerant adapts to the load change of the evaporator 202.

[0048] Optionally, a check valve 112 and a pressure relief valve 113 are also provided between the condenser 102 and the liquid storage device 107. The check valve 112 is connected to the outlet of the condenser 102 to prevent the refrigerant flowing out of the condenser 102 from flowing back and ensure the safe use of the condenser 102. The pressure relief valve 113 is connected between the check valve 112 and the liquid storage device 107. When the pressure of the refrigeration unit 100 is too high, the pressure relief valve 113 will automatically open to release the excess pressure and prevent the equipment from being damaged due to excessive pressure.

[0049] Furthermore, the refrigeration unit 100 further includes a filtering device 108, which is connected between the condenser 102 and the expansion valve 201. In this embodiment, the filtering device 108 is a dryer filter, which can absorb the moisture contained in the refrigeration unit 100, prevent the expansion valve 201 from icing up, and reduce the corrosion of the moisture on the components in the refrigeration unit 100. And the filtering device 108 can also filter out the impurities in the refrigeration unit, such as rust and dirt, metal particles, etc., to prevent these impurities from damaging the compressor 101 and at the same time avoid blocking the filter screen and the expansion valve 201.

[0050] Optionally, the filtering device 108 further includes a sight glass (not shown in the figure). Through the sight glass, the flow state of the refrigerant and the gas-liquid phase change situation can be observed, which helps to detect the water vapor content in the refrigerant and thus judge the operating state of the refrigeration unit 100.

[0051] Furthermore, the refrigerated truck further includes a defrosting unit 400, which includes an evaporator 202, a compressor 101, a defrosting valve 401 and a first connecting pipe 402. The first connecting pipe 402 is connected between the liquid outlet of the compressor 101 and the liquid inlet of the evaporator 202, and the defrosting valve 401 is connected to the first connecting pipe 402. When the evaporator 202 needs to be defrosted, the defrosting valve 401 is opened and the refrigeration valve 105 is closed, so that the high-temperature and high-pressure refrigerant gas flowing out of the compressor 101 flows through the first connecting pipe 402 to the core of the evaporator 202 to achieve defrosting of the core of the evaporator 202. When the defrosting is completed, the defrosting valve 401 is closed and the refrigeration valve 105 is opened to continue the refrigeration operation.

[0052] In this embodiment, the liquid outlet of the second separator 104 is connected to two branches. A refrigeration valve 105 is provided on one branch and is connected to the condenser 102, and a defrosting valve 401 is provided on the other branch and is connected to the evaporator 202. Preferably, the defrosting unit 400 is integrated on the refrigeration unit 100 to save space and reduce manufacturing costs.

[0053] Optionally, the defrosting unit 400 further includes a second connecting pipe 403. One end of the second connecting pipe 403 is connected to the first connecting pipe 402, and the other end is connected to the outlet end of the check valve 112 to recover the excess refrigerant in the first connecting pipe 402 and avoid waste caused by refrigerant residue in the first connecting pipe 402. As a preference, a one-way valve 404 is further provided on the second connecting pipe 403 to prevent the refrigerant from flowing back.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A refrigerated truck, characterized in that, Comprising: A chassis (1) and a refrigerated compartment (2), the refrigerated compartment (2) being located above the chassis (1), and the refrigerated compartment (2) being capable of abutting against and moving away from the chassis (1) in the height direction; A refrigeration unit (100), the refrigeration unit (100) being installed below the chassis (1), and the refrigeration unit (100) including a compressor (101) and a condenser (102); A plurality of evaporation units (200), the plurality of evaporation units (200) all being installed at the top inside the refrigerated compartment (2), and the plurality of evaporation units (200) being evenly distributed in the length direction of the refrigerated compartment (2), the refrigeration unit (100) being communicated with all the evaporation units (200) through a pipeline system (300), the evaporation unit (200) including an expansion valve (201) and an evaporator (202), and the compressor (101), the condenser (102), the expansion valve (201), and the evaporator (202) being sequentially circulated and communicated.

2. The refrigerated truck according to claim 1, characterized in that, The refrigerated truck further includes a defrosting unit (400), the defrosting unit (400) including a defrosting valve (401) and a first connecting pipe (402), the first connecting pipe (402) being communicated with the liquid outlet of the compressor (101) and the liquid inlet of the evaporator (202), and the defrosting valve (401) being connected to the first connecting pipe (402).

3. The refrigerated truck according to claim 1, wherein, The refrigeration unit (100) further includes a first separator (103), the first separator (103) being communicated between the compressor (101) and the evaporator (202).

4. The refrigerated truck according to claim 1, characterized in that, The refrigeration unit (100) further includes a second separator (104), the second separator (104) being communicated between the compressor (101) and the condenser (102).

5. The refrigerated truck according to claim 4, characterized in that, The refrigeration unit (100) further includes a refrigeration valve (105), the refrigeration valve (105) being provided on the pipeline communicating the second separator (104) and the condenser (102).

6. The refrigerated truck according to claim 1, wherein, The refrigeration unit (100) further includes a first fan (106), the first fan (106) being arranged facing the condenser (102).

7. The refrigerated truck according to claim 1, characterized in that, The refrigeration unit (100) further includes a liquid storage device (107), the liquid storage device (107) being communicated between the condenser (102) and the expansion valve (201).

8. The refrigerated truck according to claim 1, wherein, The refrigeration unit (100) further includes a filtering device (108), the filtering device (108) being communicated between the condenser (102) and the expansion valve (201).

9. The refrigerated truck according to claim 8, characterized in that, The filtering device (108) further includes a sight glass.

10. The refrigerated truck according to claim 1, characterized in that, The evaporation unit (200) further includes a second fan (203), the second fan (203) being arranged facing the evaporator (202).

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