Refrigeration system for a refrigerated vehicle, on-board air conditioner and electric refrigerated vehicle

Abstract

The utility model discloses a refrigeration system of refrigerator car, vehicle air conditioner and electric refrigerator car, include: compressor, condenser is connected with the exhaust side of compressor, evaporimeter is connected on the suction side of compressor, flash evaporator is connected between evaporimeter and condenser, and is connected with compressor, and forms refrigeration cycle loop with condenser, evaporimeter, control valve is connected between the exhaust line of compressor, condenser and evaporimeter, has with the first state that makes compressor exhaust line and condenser intercommunication and the second state that makes compressor exhaust line and evaporimeter intercommunication, control unit is connected with control valve, and control control valve switches between the first state, second state. The refrigeration system of refrigerator car that the utility model puts forward has avoided the machine failure problem of the generation of the defrosting operation mode simplification and the misoperation.

Description

Technical Field

[0001] This utility model relates to the field of electric refrigerated vehicle technology, specifically to an electric refrigerated vehicle refrigeration system, an on-board air conditioner, and an electric refrigerated vehicle equipped with an on-board air conditioner. Background Technology

[0002] Currently, while the domestic cold chain transportation industry is developing and becoming more standardized, fuel-powered (gas-powered) vehicles still dominate medium- and long-distance cold chain transport. However, with the continuous development of electric vehicle technologies, the cost of electric vehicles is decreasing, and their driving range is increasing, making electrification of short-distance cold chain transportation a future trend. Traditional refrigeration units for refrigerated trucks, which use engine-driven mechanical compressors, cannot be used in electric refrigerated trucks, necessitating the development of refrigeration units for refrigerated trucks that utilize electric compressors.

[0003] Refrigerated trucks include refrigerated and frozen types. Frozen types also need to operate in refrigeration during hot summer weather. According to relevant national standards and actual usage requirements, the lowest temperature inside a regular frozen refrigerated truck is -20°C, while the outside temperature can reach over 40°C in summer. This results in a high compressor pressure ratio in the refrigeration unit of the refrigeration truck, poor refrigeration effect, and low compressor reliability.

[0004] Refrigerated truck units on the market generally use electric compressors with R404A refrigerant. Under refrigeration conditions, the refrigerant flow is low and the cooling capacity is low.

[0005] When a refrigeration unit in a refrigerated truck is operating in either refrigeration or freezing mode, and the evaporation temperature is below 0°C, frost will form on the evaporator. Over time, the frost layer will become thicker and thicker. Traditional refrigerated truck units use a defrost valve and a solenoid valve for defrosting. The defrost valve has separate valves for defrosting and refrigeration. When performing defrosting, both valves need to be operated, which is cumbersome. Furthermore, if the refrigeration valve is not turned off during defrosting, it will cause system malfunction. Utility Model Content

[0006] In response to the problems mentioned in the background art regarding the poor freezing performance of refrigeration systems in refrigerated trucks during high-temperature summer environments and the cumbersome defrosting operation that can lead to machine malfunctions due to operational errors, a new refrigeration system for refrigerated trucks is proposed. This system simplifies the defrosting operation and avoids machine malfunctions caused by misoperation.

[0007] In some embodiments of this application, a refrigeration system for a refrigerated truck is provided, comprising: compressor; The condenser is connected to the compressor's discharge side; The evaporator is connected to the suction side of the compressor; The flash evaporator is connected between the evaporator and the condenser, and is also connected to the compressor, forming a refrigeration cycle loop with the condenser and the evaporator; The control valve is connected between the compressor's discharge line, the condenser, and the evaporator, and has a first state that connects the compressor's discharge line and the condenser, and a second state that connects the compressor's discharge line and the evaporator. The control unit is connected to the control valve and controls the valve to switch between the first state and the second state.

[0008] The above embodiments have the following advantages and effects: The refrigeration system of the refrigerated truck in this embodiment adds a flash evaporator to the original refrigeration system. The flash evaporator introduces the refrigerant that has vaporized inside it to the compressor side, thereby achieving the effect of replenishing gas and increasing the capacity of the compressor. Compared with the existing refrigeration system, the system's refrigeration capacity is improved, ensuring the reliable refrigeration operation of the entire refrigerated truck refrigeration system in the high temperature of summer. Furthermore, the defrosting structure has been improved by connecting a control valve between the compressor discharge side, condenser, and evaporator. The switching between the two states via a single control valve makes the operation of switching between refrigeration and defrosting more convenient. Since the compressor discharge side is connected to the condenser during cooling and to the evaporator during defrosting, the compressor discharge side will be disconnected from the evaporator when the control valve is in the first state. Correspondingly, the compressor discharge side will be disconnected from the condenser when the control valve is in the second state. This avoids the system failure problem caused by forgetting to switch the control of one of the multiple valves.

[0009] In some embodiments of this application, the control valve includes: a first valve port, a second valve port, and a third valve port; When the first valve port is connected to the second valve port, the compressor discharge side and the condenser are connected to perform refrigeration. When the first valve port and the third valve port are connected, the compressor discharge side is connected to the evaporator for defrosting.

[0010] The above embodiments have the following advantages and effects: By controlling the switching of the first valve port connected to the compressor exhaust side, the second valve port connected to the condenser, and the third valve port connected to the evaporator, rapid switching control between refrigeration and defrosting modes can be achieved.

[0011] In some embodiments of this application, a gas-liquid separator is provided between the compressor and the evaporator; The control valve includes a fourth valve port, which is connected between the evaporator and the gas-liquid separator via a connecting pipe.

[0012] The above embodiments have the following advantages and effects: When the control valve switches between valve ports, the switching is achieved through pressure difference. The fourth valve port connected between the evaporator and the gas-liquid separator provides a low pressure for the control valve switching, ensuring the normal switching operation of the control valve.

[0013] In some embodiments of this application, the flash evaporator is connected to the compressor via a gas supply line, and a gas supply control valve is provided on the gas supply line to control the opening and closing of the gas supply line.

[0014] The above embodiments have the following advantages and effects: By installing a gas supply control valve on the gas supply line, the on / off state of the gas supply line can be effectively controlled, and the on / off control ensures precise control of the gas supply to the compressor.

[0015] In some embodiments of this application, when the control valve is in the second state, the control unit controls the air supply control valve to close.

[0016] The above embodiments have the following advantages and effects: When the control valve is in the second state, the compressor is connected to the evaporator for defrosting. The defrosting process is carried out normally by closing the gas injection control valve.

[0017] In some embodiments of this application, the following are formed on both sides of the flash evaporator: The first refrigerant line connects to the evaporator; The second refrigerant line connects to the condenser. A first electronic expansion valve is installed on the first refrigerant line, and a second electronic expansion valve is installed on the second refrigerant line.

[0018] The above embodiments have the following advantages and effects: By cooperating with the first and second electronic expansion valves arranged on the first and second refrigerant lines connected to both sides of the flash evaporator, the liquid level inside the flash evaporator can be controlled. At the same time, by controlling the refrigerant flow rate on the refrigerant lines at the first and second electronic expansion valves, the gas injection pressure of the flash evaporator can also be regulated.

[0019] Some embodiments of this application include: The defrost branch is connected between the refrigeration cycle loop and the third valve port. When the refrigeration system is in the second state, the defrost branch is connected to the compressor.

[0020] The above embodiments have the following advantages and effects: During defrosting, the compressor discharge side and the evaporator can be connected via a defrosting branch connected between the third valve port and the refrigeration cycle loop.

[0021] In some embodiments of this application, a high-pressure liquid storage tank is provided between the condenser and the flash evaporator.

[0022] A vehicle-mounted air conditioner, comprising the electric refrigerated truck refrigeration system described in the above technical solution, further comprising: Air conditioner mounting frame; A first mounting portion is formed on the air conditioner mounting frame for mounting the condenser; The sealing component is assembled on the air conditioner mounting frame, corresponding to the position of the condenser; A condenser fan is mounted on the sealing component; The second mounting section is used to mount the evaporator assembly and is disposed opposite to the first mounting section; The third mounting section is formed on one side of the air conditioner mounting frame and is used to assemble the compressor, high-pressure liquid receiver, flash evaporator and control valve.

[0023] The above embodiments have the following advantages and effects: By arranging the first mounting part, the second mounting part, and the third mounting part on the air conditioner mounting frame, the condenser, evaporator, as well as components such as the compression molding machine, high-pressure liquid tank, and flash evaporator can be rationally arranged, making the entire vehicle air conditioner structure compact, greatly reducing the volume of the vehicle air conditioner, and reducing the space occupied when assembled on the vehicle body.

[0024] An electric refrigerated truck includes the vehicle air conditioner described in the above technical solution.

[0025] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a system schematic diagram of the refrigeration system for a refrigerated truck according to an embodiment; Figure 2 This is a schematic diagram showing the flow of refrigerant when the refrigeration system of the refrigerated truck is in refrigeration mode according to an embodiment; Figure 3 This is a schematic diagram of the refrigerant flow direction when the refrigeration system of the refrigeration truck according to the embodiment is in the refrigeration booster state; Figure 4This is a schematic diagram of the refrigerant flow structure of the refrigeration system of the refrigeration truck in the defrosting state according to the embodiment; Figure 5 The three-dimensional structure of the vehicle air conditioner according to the embodiment Figure 1 ; Figure 6 The three-dimensional structure of the vehicle air conditioner according to the embodiment Figure 2 ; Figure 7 This is a schematic diagram of the structure of the refrigeration system of the refrigerated truck arranged on the vehicle air conditioning frame according to an embodiment; Figure 8 This is a schematic diagram of a condenser mounted on a vehicle air conditioning frame according to an embodiment; Figure 9 The three-dimensional structure of the vehicle air conditioner according to the embodiment Figure 3 ; Figure 10 The three-dimensional structure of the vehicle air conditioner according to the embodiment Figure 4 .

[0028] Figure label: Among them, 100 is the compressor; 200 is the condenser; 300 is the evaporator; 400 is the flash evaporator; 410 is the first interface pipe; 420 is the second interface pipe; 430 is the third interface pipe; 510 is the refrigeration cycle loop; 520 is the gas supply line; 521 is the gas supply control valve; 530 is the first refrigerant line; 531 is the first electronic expansion valve; 540 is the second refrigerant line; 541 is the second electronic expansion valve; 550 is the defrost branch; 5 60. One-way valve; 600. Control valve; 610. First valve port; 620. Second valve port; 630. Third valve port; 640. Fourth valve port; 700. Gas-liquid separator; 800. High-pressure liquid storage tank; 910. Air conditioner mounting frame; 911. First mounting part; 920. Sealing component; 930. Condenser fan; 912. Second mounting part; 913. Third mounting part; 940. Evaporator enclosure; 950. Partition. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0035] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0036] In some embodiments of this application, reference is made to Figure 1 As shown, a refrigeration system for a refrigerated truck is provided, including: Compressor 100; The condenser 200 is connected to the exhaust side of the compressor 100, and the condenser 200 is connected to the exhaust side of the compressor 100 through a first pipeline.

[0037] Evaporator 300 is connected to the suction side of compressor 100, and evaporator 300 is connected to compressor 100 through a second pipeline.

[0038] The flash evaporator 400 is connected between the evaporator 300 and the condenser 200, and is connected to the compressor 100, forming a refrigeration cycle loop 510 with the condenser 200 and the evaporator 300.

[0039] The flash evaporator 400 has an open top and is equipped with a first interface tube 410, a second interface tube 420 and a third interface tube 430 inside. The first interface tube 410, the second interface tube 420 and the third interface tube 430 are all inserted into the flash evaporator 400. The length of the second interface tube 420 is less than that of the first interface tube 410 and the second interface tube 420.

[0040] During connection, the first interface pipe 410 is connected to the evaporator 300, the third interface pipe 430 is connected to the condenser 200, and the second interface pipe 420 is connected to the compressor 100 to supply gas to the compressor 100.

[0041] The refrigeration cycle circuit 510, formed by connecting the compressor 100, condenser 200, evaporator 300 and flash evaporator 400, can be used to refrigerate refrigerated trucks.

[0042] Reference Figure 3As shown, during refrigeration operation, the refrigerant flowing out from the compressor 100 side is discharged from the compressor 100 exhaust side. The refrigerant discharged from the compressor 100 exhaust side reaches the condenser 200 and releases heat. The gas-liquid mixture refrigerant flowing out from the condenser 200 enters the flash evaporator 400 through the second interface pipe 420. After the gas-liquid mixture enters the flash evaporator 400, by controlling the pressure of the flash evaporator 400, part of the refrigerant will flash evaporate, that is, rapidly vaporize. The vaporized gas will enter the compressor 100 through the second interface pipe 420, achieving the effect of replenishing gas and increasing the capacity of the compressor 100.

[0043] After heat exchange in the condenser 200, the liquid refrigerant enters the first interface pipe 410 from the flash evaporator 400, and then enters the evaporator 300 to evaporate and absorb heat, thereby achieving the cooling function.

[0044] By replenishing the compressor 100 with gas through the flash evaporator 400, its power consumption is lower than that of conventional refrigeration systems when outputting the same cooling capacity. This ensures the cooling capacity in high-temperature environments in summer and guarantees the reliable operation of the entire refrigerated truck refrigeration system in high-temperature environments. Furthermore, due to the replenishment of gas to the compressor 100, the cooling capacity of the entire system is more energy-efficient, far exceeding that of conventional refrigeration system structures, thus achieving energy-saving effects.

[0045] In some embodiments of this application, reference is made to Figure 1 As shown, the refrigeration system of the refrigerated truck also includes: a control valve 600, which is connected between the compressor's exhaust pipe, the condenser 200 and the evaporator 300, and has a first state that connects the compressor's exhaust pipe and the condenser 200 and a second state that connects the compressor's exhaust pipe and the evaporator 300.

[0046] The control unit is connected to the control valve 600 and controls the control valve 600 to switch between the first state and the second state.

[0047] The control unit adopts a control board structure, which is used to control the control valve 600.

[0048] Reference Figures 2-3 As shown, when the control valve 600 is in the first state, the compressor exhaust pipe is connected to the condenser 200, and the compressor exhaust pipe is not connected to the evaporator 300. At this time, a refrigeration cycle loop 510 is formed between the compressor 100, the condenser 200, and the flash evaporator 400. When the compressor 100 starts, the entire refrigeration system operates normally and performs refrigeration work.

[0049] Reference Figure 4As shown, when the control valve 600 is in the second state, the compressor discharge pipe and the evaporator 300 are connected. At this time, the compressor discharge pipe and the condenser 200 are not connected, and a defrosting circuit is formed between the compressor 100 and the evaporator 300.

[0050] The high-temperature, high-pressure refrigerant flowing out from the discharge side of compressor 100 will flow into evaporator 300 to release heat, and defrost evaporator 300 by releasing heat at evaporator 300.

[0051] When in use, the control unit can control the control valve 600 to enter the first state or the second state according to the actual usage requirements. For example, when refrigeration is required, the control unit can control the control valve 600 to enter the first state, and when defrosting is required, the control unit can control the control valve 600 to enter the second state.

[0052] In some embodiments of this application, an exhaust pressure sensor and an exhaust pressure switch are provided on the exhaust side of the compressor 100, and the exhaust pressure on the exhaust side of the compressor 100 is detected by the exhaust pressure sensor.

[0053] The above embodiments have the following advantages and effects: The refrigeration system of the refrigerated truck in this embodiment adds a flash evaporator 400 to the original refrigeration system. The flash evaporator 400 introduces the refrigerant that has vaporized inside it to the compressor 100 side, realizing the effect of replenishing gas and increasing the capacity of the compressor 100. Compared with the existing refrigeration system, the system's refrigeration capacity is improved, ensuring the reliable refrigeration operation of the entire refrigerated truck refrigeration system in the high temperature of summer. Furthermore, the defrosting structure has been improved by connecting a control valve 600 between the compressor 100 discharge side, the condenser 200 and the evaporator 300. The switching between the two states of the control valve 600 is achieved through switching between the refrigeration and defrosting states, making the refrigeration and defrosting switching control operation more convenient. Since the compressor 100 is connected to the condenser 200 during cooling and to the evaporator 300 during defrosting, the compressor 100's discharge side is connected to the evaporator 300 when the control valve 600 is in the first state. Correspondingly, when the control valve 600 is in the second state, the compressor 100's discharge side is disconnected from the condenser 200. This avoids the system malfunction caused by forgetting to switch the control of one of the multiple valves.

[0054] In some embodiments of this application, reference is made to Figures 2-3 As shown, the control valve 600 includes: a first valve port 610, a second valve port 620, and a third valve port 630; When the first valve port 610 is connected to the second valve port 620, the exhaust side of the compressor 100 and the condenser 200 are connected to perform refrigeration. When the first valve port 610 and the third valve port 630 are connected, the discharge side of the compressor 100 is connected to the evaporator 300 for defrosting.

[0055] In some embodiments, the control valve 600 is a three-way valve or a four-way valve.

[0056] The first valve port is connected to the discharge side of the compressor 100, the second valve port is connected to the condenser 200, and the third valve port is connected to the evaporator 300.

[0057] The above embodiments have the following advantages and effects: By controlling the switching of the first valve port connected to the exhaust side of the compressor 100, the second valve port connected to the condenser 200, and the third valve port connected to the evaporator 300, rapid switching control between refrigeration and defrosting modes can be achieved.

[0058] In some embodiments of this application, reference is made to Figures 2-3 As shown, a gas-liquid separator 700 is provided between the compressor 100 and the evaporator 300; The control valve 600 includes a fourth valve port 640, which is connected between the evaporator 300 and the gas-liquid separator 700 via a connecting pipe.

[0059] The gas-liquid separator 700 is mainly used to achieve the effect of gas-liquid separation.

[0060] When the control valve 600 switches between valve ports, the switching is carried out by pressure difference. The fourth valve port 640 connected between the evaporator 300 and the gas-liquid separator 700 can provide a low pressure for the control valve 600 to switch, ensuring that the control valve 600 can switch normally.

[0061] In some embodiments of this application, reference is made to Figure 1 As shown, the flash evaporator 400 is connected to the compressor 100 via a gas supply line 520, and a gas supply control valve 521 is provided on the gas supply line 520.

[0062] The condensate flowing out of condenser 200 enters flash evaporator 400, where it undergoes partial flash evaporation, i.e., rapid vaporization. This process not only optimizes the system's operating efficiency but also improves the system's energy efficiency ratio.

[0063] By arranging the gas supply control valve 521 on the gas supply line 520, the on / off state of the gas supply line 520 can be effectively controlled, and the on / off control can ensure precise control of the gas supply to the compressor 100.

[0064] The air replenishment control valve 521 can be a solenoid valve.

[0065] In some embodiments of this application, reference is made to Figure 4 As shown, when the control valve 600 is in the second state, the control unit controls the air replenishment control valve 521 to close.

[0066] When the compressor 100 is running in the refrigeration mode, in order to improve the energy efficiency of the entire refrigeration system, the gas replenishment control valve 521 needs to be opened to replenish gas. When the refrigeration system of the refrigerated truck is defrosting, there is no need to replenish gas. At this time, the control unit can keep the gas replenishment control valve 521 closed.

[0067] In some embodiments of this application, reference is made to Figure 1 As shown, the following are formed on both sides of the flash evaporator 400: The first refrigerant line 530 is connected to the evaporator 300.

[0068] Specifically, the first refrigerant line 530 is connected to the first interface line 410 of the flash evaporator 400 and the evaporator 300.

[0069] The second refrigerant line 540 is connected to the condenser 200.

[0070] The second refrigerant line 540 is connected to the second interface line 420 of the flash evaporator 400 and the condenser 200.

[0071] A first electronic expansion valve 531 is installed on the first refrigerant line 530, and a second electronic expansion valve 541 is installed on the second refrigerant line 540.

[0072] The first electronic expansion valve 531 can be used to regulate and control the refrigerant flow rate on the first refrigerant line 530, and the second electronic expansion valve 541 can be used to regulate and control the refrigerant flow rate on the second refrigerant line 540.

[0073] The above embodiments have the following advantages and effects: By cooperating with the first electronic expansion valve 531 and the second electronic expansion valve 541 arranged on the first refrigerant line 530 and the second refrigerant line 540 connected on both sides of the flash evaporator 400, the liquid level inside the flash evaporator 400 can be controlled. At the same time, by controlling the refrigerant flow rate on the refrigerant line at the first electronic expansion valve 531 and the second electronic expansion valve, the gas injection pressure of the flash evaporator 400 can also be regulated and controlled.

[0074] In some embodiments of this application, reference is made to Figure 4 As shown, the refrigeration system of the refrigerated truck includes: The defrost branch 550 is connected between the refrigeration cycle loop 510 and the third valve port. When the refrigeration system is in the second state, the defrost branch 550 is connected to the compressor 100.

[0075] During defrosting, the compressor 100 discharge side and the evaporator 300 can be connected via the defrosting branch 550 connected between the third valve port and the refrigeration cycle circuit 510.

[0076] In some embodiments of this application, a high-pressure liquid storage tank 800 is provided between the condenser 200 and the flash evaporator 400.

[0077] In some embodiments of this application, reference is made to Figure 1 As shown, a one-way valve 560 is provided between the junction of the defrost branch 550 and the first refrigerant line 530 and the first electronic expansion valve 531, which restricts the refrigerant to flow only from the flash evaporator 400 to the evaporator 300.

[0078] The one-way valve 560 prevents refrigerant from flowing back into the flash evaporator 400, high-pressure liquid tank 800, and condenser 200 during hot gas defrosting, and prevents backflow into the first electronic expansion valve 531.

[0079] In some embodiments of this application, reference is made to Figure 5-9 As shown, a vehicle air conditioner is proposed, including the electric refrigerated truck refrigeration system described in the above embodiments, comprising: Air conditioner mounting frame 910 is used to assemble on refrigerated trucks to achieve connection and fixation with refrigerated trucks.

[0080] A first mounting portion 911 is formed on the air conditioner mounting frame 910 for mounting the condenser 200; The sealing component 920 is assembled on the air conditioner mounting frame 910 and corresponds to the position of the condenser 200. A condenser fan 930 is mounted on the sealing component 920; The second mounting part 912 is used to mount the evaporator assembly and is disposed opposite to the first mounting part 911; The third mounting part 913 is formed on one side of the air conditioner mounting frame 910 and is used to assemble the compressor 100, the high-pressure liquid tank 800, the flash evaporator 400 and the control valve 600.

[0081] The first mounting part 911 is a first mounting frame formed at the air conditioner mounting frame 910. When the condenser 200 is assembled, it is arranged at an angle and fixedly connected to the periphery of the first mounting frame by screws.

[0082] The sealing component 920 is a sealing plate, which is installed on the side of the first mounting frame opposite to the condenser 200.

[0083] One or more condenser fans 930 can be installed and arranged at intervals along the length of the sealing member 920.

[0084] The second mounting section 912 is a second mounting cavity formed on the air conditioner mounting frame 910.

[0085] The evaporator 300 assembly is assembled in the second mounting cavity.

[0086] The third mounting section 913 is a third mounting space formed on the air conditioner mounting frame 910.

[0087] The compressor 100, high-pressure liquid receiver 800, flash evaporator 400, and control valve 600 are all fixed in the third installation space.

[0088] The above embodiments have the following advantages and effects: By arranging the first mounting part 911, the second mounting part 912, and the third mounting part 913 on the air conditioner mounting frame 910, the condenser 200, evaporator 300, as well as the compression molding machine, high-pressure liquid storage tank 800, and flash evaporator 400 and other components are rationally arranged, making the entire vehicle air conditioner structure compact, greatly reducing the volume of the vehicle air conditioner, and reducing the space occupied when assembled on the vehicle body.

[0089] In some embodiments of this application, the evaporator 300 assembly includes: The evaporator enclosure 940 has an opening on one side; A partition 950 is disposed inside the evaporator enclosure 940 to divide the evaporator enclosure 940 into a first cavity and a second cavity; An evaporator 300 is disposed within the first cavity; The evaporator fan is located inside the second chamber.

[0090] By dividing the evaporator housing 940 with partitions 950, the evaporator 300 and the evaporation fan are compactly arranged inside the evaporator housing 940, reducing the space occupied.

[0091] In some embodiments of this application, an electric refrigerated vehicle is proposed, including the vehicle air conditioner described in the above embodiments.

[0092] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A refrigeration system for a refrigerated truck, characterized in that, Including: compressor; The condenser is connected to the discharge side of the compressor; The evaporator is connected to the suction side of the compressor; A flash evaporator is connected between the evaporator and the condenser, and is also connected to the compressor, forming a refrigeration cycle loop with the condenser and the evaporator; A control valve, connected between the compressor's discharge line, the condenser, and the evaporator, has a first state that connects the compressor's discharge line and the condenser, and a second state that connects the compressor's discharge line and the evaporator. The control unit is connected to the control valve and controls the control valve to switch between a first state and a second state.

2. The refrigeration system for refrigerated trucks according to claim 1, characterized in that, The control valve includes: a first valve port, a second valve port, and a third valve port; When the first valve port is connected to the second valve port, the compressor exhaust side and the condenser are connected to perform refrigeration. When the first valve port and the third valve port are connected, the compressor exhaust side is connected to the evaporator for defrosting.

3. The refrigeration system for refrigerated trucks according to claim 1, characterized in that, A gas-liquid separator is provided between the compressor and the evaporator; The control valve includes a fourth valve port, which is connected between the evaporator and the gas-liquid separator via a connecting pipe.

4. The refrigeration system for refrigerated trucks according to claim 1, characterized in that, The flash evaporator is connected to the compressor via a gas supply line, and a gas supply control valve is installed on the gas supply line to control the opening and closing of the gas supply line.

5. The refrigeration system for refrigerated trucks according to claim 4, characterized in that, When the control valve is in the second state, the control unit controls the air replenishment control valve to close.

6. The refrigeration system for refrigerated trucks according to claim 1, characterized in that, The following are formed on both sides of the flash evaporator: The first refrigerant line is connected to the evaporator; A second refrigerant line is connected to the condenser; A first electronic expansion valve is installed on the first refrigerant line, and a second electronic expansion valve is installed on the second refrigerant line.

7. The refrigeration system for refrigerated trucks according to claim 1, characterized in that, Including: The defrost branch is connected between the refrigeration cycle loop and the third valve port. When the refrigeration system is in the second state, the defrost branch is connected to the compressor.

8. The refrigeration system for refrigerated trucks according to claim 1, characterized in that, A high-pressure liquid storage tank is provided between the condenser and the flash evaporator.

9. A vehicle air conditioner, comprising the refrigerated truck refrigeration system as described in claim 8, characterized in that, It also includes: Air conditioner mounting frame; A first mounting portion is formed on the air conditioner mounting frame for mounting the condenser; The sealing component is assembled on the air conditioner mounting frame, corresponding to the position of the condenser. A condenser fan is mounted on the sealing component; The second mounting section is used to mount the evaporator assembly and is disposed opposite to the first mounting section; The third mounting section is formed on one side of the air conditioner mounting frame and is used to assemble the compressor, the high-pressure liquid receiver, the flash evaporator, and the control valve.

10. An electric refrigerated truck, characterized in that, It includes the vehicle air conditioner as described in claim 9.

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