Method for modifying a stirring vehicle and electrically driven air conditioner and application

Abstract

The application provides a mixer truck, an electric drive air conditioner modification method and application. The electric drive air conditioner modification method is used for modifying an original vehicle-mounted air conditioner of the mixer truck. The method comprises the following steps: (a) disconnecting an original condenser and an original compressor of the original vehicle-mounted air conditioner, and retaining an original evaporator of the original vehicle-mounted air conditioner; (b) providing an outdoor integrated machine and an electric drive. The outdoor integrated machine comprises the condenser and the compressor. The electric drive is electrically connected with the compressor; (c) directly mounting the outdoor integrated machine to the mixer truck, and connecting the original evaporator, the condenser and the compressor in series to form an air conditioner loop. The method effectively reduces the cost. The compressor and the condenser do not need to be installed one by one. Only the outdoor integrated machine needs to be installed once. The method not only reduces the modification process, but also makes the structure after modification more compact, reduces the occupied area, and is convenient for installation and maintenance. In addition, the compressor is provided with electric energy by the electric drive, so that the oil consumption is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of concrete mixer trucks, and more particularly to a concrete mixer truck, a method for retrofitting an electric air conditioning system, and its application. Background Technology

[0002] A concrete mixer truck is a specialized truck used to transport concrete for construction. These trucks are typically equipped with energy recovery systems, onboard air conditioning, and mixing tanks. The energy recovery system converts wasted energy such as heat, mechanical energy, and light energy into electrical energy for storage and reuse. The onboard air conditioning is used to cool the cab of the mixer truck. The mixing tank is used to continuously mix the concrete to prevent it from hardening and becoming unable to flow out.

[0003] Traditional fuel-fired mixer trucks use oil-powered air conditioning and mixing tanks. Taking the air conditioning as an example, it includes an evaporator installed in the cab, and a compressor and condenser installed in the engine compartment. When the driver turns on the air conditioning, the compressor's clutch plate connects to the engine, thus driving the compressor. However, to save fuel and improve cab comfort, traditional fuel-fired mixer trucks are modified to have electric air conditioning, meaning the compressor is powered by a battery. The typical modification process is as follows:

[0004] Purchase a brand new electric air conditioning unit, including the battery, indoor and outdoor units, electric compressor, and expansion valve. The indoor unit is installed inside the cab, while the battery and other air conditioning components are installed on the top or rear of the cab.

[0005] The above-mentioned modification process directly abandons the original vehicle air conditioning system and fails to make effective use of the equipment and control panel of the original air conditioning system. This not only increases the modification cost, but also requires the separate installation of an air conditioning control panel or configuration of an air conditioning remote control, causing inconvenience to the driver while driving and affecting driving safety.

[0006] In addition, as the working time increases, the motor and battery will generate heat. When the heat is too much, it will directly affect the performance of the motor and battery. Therefore, a cooling system is required. However, the current cooling system mainly uses additional circulating water pumps, circulating water tanks, radiators and cooling fans to cool the motor. This not only makes the system complex, but also further increases the cost. Summary of the Invention

[0007] To address the aforementioned issues, this invention provides a method and application for retrofitting a mixer truck with an electric air conditioning system that utilizes the cooling capacity of an air conditioner to cool the motor and battery, eliminating the need for additional cooling equipment and retaining some of the original vehicle air conditioning system structure. This achieves the goals of a compact structure and reduced costs.

[0008] According to one objective of the present invention, the present invention provides a method for retrofitting an electric air conditioning system in a concrete mixer truck, the method comprising the following steps:

[0009] (a) Disconnect one original condenser and one original compressor of the original vehicle air conditioner, and retain one original evaporator of the original vehicle air conditioner;

[0010] (b) Provides an outdoor unit and at least one electric drive, the outdoor unit including a condenser and a compressor, the electric drive and the compressor being electrically connected;

[0011] (c) The outdoor unit is directly installed on the mixer truck, and the original evaporator, the condenser and the compressor are connected in series to form an air conditioning circuit.

[0012] In a preferred embodiment, the outdoor integrated unit further includes at least one heat exchanger, the heat exchanger comprising at least one first heat exchange section and at least one second heat exchange section that are separated from each other and capable of exchanging heat, and thus step (b) includes:

[0013] (b1) The first heat exchange section, the condenser and the compressor are connected in series so that the first refrigerant can circulate between the first heat exchange section and the condenser;

[0014] (b3) The electric drive and the second heat exchange unit are connected in series so that the second refrigerant can circulate between the electric drive and the second heat exchange unit.

[0015] In a preferred embodiment, the number of heat exchangers is one, and the number of electric drives and the second heat exchange section are equal, thus step (b3) includes:

[0016] Each of the electric drives is connected in series to its corresponding second heat exchange unit.

[0017] Alternatively, the number of electric drives and heat exchangers is equal, and the number of second heat exchange sections in the heat exchangers is one, thus step (b3) includes:

[0018] Each of the electric drives is connected in series to the second heat exchange section of the corresponding heat exchanger.

[0019] In a preferred embodiment, step (c) includes:

[0020] The first heat exchange section is connected in parallel to both ends of the original evaporator.

[0021] In a preferred embodiment, in step (a), the original control panel of the original vehicle air conditioner is retained so that in step (c), the compressor and the original control panel are electrically connected so that the original control panel can control the operation of the compressor.

[0022] In a preferred embodiment, the electric drive includes at least one of the following:

[0023] Battery packs, disc motors, and disc generators.

[0024] In a preferred embodiment, the mixer truck includes a mixing superstructure, which includes a reducer, a disc motor, and a mixing tank. The disc motor is mounted on the reducer and is connected to the mixing tank of the mixer truck in a transmission connection. The method further includes:

[0025] The disc motor and the battery pack are electrically connected so that the battery pack supplies power to the disc motor;

[0026] And / or, the mixer truck includes an energy recovery system, the energy recovery system including an engine, a power take-off (PTO), and a disc generator mounted on the PTO, the method further including:

[0027] The disc generator is electrically connected to the battery pack to recover energy from the engine and charge the battery pack. According to another objective of the present invention, the present invention also provides an electric air conditioning retrofit method according to the above embodiments, which is applied in the field of retrofitting fuel-powered mixer trucks or new energy mixer trucks.

[0028] According to another object of the present invention, the present invention also provides a mixer truck, comprising:

[0029] A former vehicle air conditioner, wherein the former vehicle air conditioner includes a former evaporator;

[0030] An outdoor integrated unit, the outdoor integrated unit including a compressor and a condenser, the compressor, the condenser and the original evaporator are connected in series to form an air conditioning circuit;

[0031] At least one electric drive is provided, and the electric drive is electrically connected to the compressor.

[0032] In a preferred embodiment, the outdoor integrated unit further includes:

[0033] At least one heat exchanger, the heat exchanger including at least one first heat exchange section and at least one second heat exchange section that are separated from each other and capable of exchanging heat, the first heat exchange section being connected in parallel to both ends of the original evaporator so that the first refrigerant can circulate between the original evaporator, the condenser and the first heat exchange section; the electric drive and the second heat exchange section being connected in series so that the second refrigerant can circulate between the electric drive and the second heat exchange section.

[0034] Compared with existing technologies, this technical solution has the following advantages:

[0035] The described electric-drive air conditioning retrofit method involves modifying the original vehicle-mounted air conditioning system. It discards the original compressor and condenser installed in different locations on the mixer truck, retaining the original evaporator located in the driver's cab, and equipping it with an integrated outdoor unit that combines the condenser and compressor. Compared to a complete reconfiguration, this method effectively reduces costs and eliminates the need for individual compressor and condenser installations; only the integrated outdoor unit needs to be installed once. This reduces the number of modification steps, resulting in a more compact structure, minimizing floor space and facilitating installation and maintenance. Furthermore, the compressor is powered by the electric drive, effectively reducing fuel consumption. The electric drive utilizes the circulating second refrigerant and the first refrigerant for heat exchange to achieve cooling. Therefore, the electric drive utilizes the cooling capacity of the air conditioner for cooling, eliminating the need for additional and complex cooling structures, simplifying the structure and reducing operating costs.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0037] Figure 1 This is a structural block diagram of the existing vehicle air conditioner.

[0038] Figure 2 This is a schematic diagram of the modified vehicle air conditioner according to the present invention;

[0039] Figure 3 This is a schematic diagram of the heat exchanger described in this invention;

[0040] Figure 4 This is a front view of the mixer truck described in this invention;

[0041] Figure 5 This is a top view of the mixer truck described in this invention;

[0042] Figure 6 This is a left view of the mixer truck described in this invention. Detailed Implementation

[0043] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0044] like Figure 2As shown, the electric air conditioning modification method is used to modify the original on-board air conditioning unit 100' of a fuel-powered mixer truck. The method includes the following steps:

[0045] (a) Disconnect the original condenser 111' and the original compressor 114' of the original vehicle air conditioner 100', and retain the original evaporator 121' of the original vehicle air conditioner;

[0046] (b) Provides an outdoor unit 110 and at least one electric drive 113, the outdoor unit 110 including a condenser 111 and a compressor 114, the electric drive 113 and the compressor 114 being electrically connected;

[0047] (c) The outdoor unit 110 is directly installed on the mixer truck, and the original evaporator 121', the condenser 111 and the compressor 114 are connected in series to form an air conditioning circuit.

[0048] The electric air conditioning retrofit method described above is based on the original vehicle air conditioner 100'. It discards the original compressor 114' and condenser 111' installed in different locations on the mixer truck, retains the original evaporator 121' located in the cab 200, and equips it with an outdoor integrated unit 110 that integrates the condenser 111 and compressor 114. Compared to a complete reconfiguration, this method effectively reduces costs and eliminates the need to install the compressor 114 and condenser 111 individually; only the outdoor integrated unit 110 needs to be installed once. This not only reduces the number of retrofit steps but also makes the modified structure more compact, reducing floor space and facilitating installation and maintenance. Furthermore, the compressor 114 is powered by the electric drive 113, effectively reducing fuel consumption.

[0049] like Figure 1 As shown, the original vehicle air conditioner 100' includes an original evaporator 121', an original compressor 114', an original condenser 111', and an original expansion valve 116'. The original evaporator 121', the original compressor 114', the original condenser 111', and the original expansion valve 116' are connected in series to form an air conditioning circuit, and the refrigerant circulates in the air conditioning return flow.

[0050] The original evaporator 121' is located inside the cab 200 of the mixer truck, while the original compressor 114' and the original condenser 111' are scattered in the engine compartment. Their working principle is as follows:

[0051] The original compressor 114' draws gaseous refrigerant from the original evaporator 121' and compresses it into the original condenser 111'. The high-pressure gaseous refrigerant liquefies in the original condenser 111', undergoing heat exchange (releasing heat), which is carried away by the air outside the cab 200. The high-pressure liquid refrigerant is depressurized by the throttling effect of the original expansion valve 116', and the low-pressure liquid refrigerant vaporizes in the original evaporator 121', undergoing heat exchange (absorbing heat). The cooled air near the original evaporator 121' is blown into the cab 200 by a blower or similar device.

[0052] In this embodiment, the original evaporator 121' installed in the cab 200 is retained, and the original compressor 114' and the original condenser 111' are replaced by the outdoor integrated unit 110, which avoids the need to install an additional indoor air conditioning unit in the cab 200. This not only saves costs and reduces the number of modification procedures, but also facilitates centralized maintenance and installation of the various parts of the outdoor integrated unit 110.

[0053] refer to Figure 2 In step (a), the original control panel of the original vehicle air conditioner 100' can be retained so that in step (c), the compressor 114 and the original control panel can be electrically connected, enabling the original control panel to control the operation of the compressor 114. This avoids the need for a separate control board or remote control for the air conditioner, thus reducing costs and improving safety.

[0054] Continue to refer to Figure 2 In step (a), the original expansion valve 116' of the original vehicle air conditioner 100' can be removed so that in step (b), the outdoor integrated unit 110 also includes the expansion valve 116', and the original evaporator 121', the expansion valve 116', the condenser 111 and the compressor 114 are connected in series to form an air conditioning circuit.

[0055] like Figure 2 and Figure 3 As shown, the outdoor integrated unit 110 further includes at least one heat exchanger 112, the heat exchanger 112 including at least one first heat exchange section 1121 and at least one second heat exchange section 1122 that are separated from each other and capable of exchanging heat, and thus step (b) includes:

[0056] (b1) The first heat exchange section 1121, the condenser 111 and the compressor 114 are connected in series so that the first refrigerant can circulate between the first heat exchange section 1121 and the condenser 111;

[0057] (b3) The electric drive 113 and the second heat exchange unit 1122 are connected in series so that the second refrigerant can circulate between the electric drive 113 and the second heat exchange unit 1122.

[0058] The first refrigerant can be a refrigerant that circulates within the air conditioning circuit formed between the first heat exchange section 1121, the original evaporator 121', and the condenser 111. The second refrigerant can be a refrigerant or the like that that circulates between the second heat exchange section 1122 and the electric drive 113. Since the first heat exchange section 1121 and the second heat exchange section 1122 can exchange heat, the electric drive 113 utilizes the second refrigerant and the first refrigerant for heat exchange to achieve cooling. Therefore, the electric drive 113 utilizes the cooling capacity of the air conditioner for cooling, eliminating the need for additional and complex cooling structures, such as radiators, cooling fans, circulating water pumps, and circulating water tanks, simplifying the structure and further reducing operating costs.

[0059] refer to Figure 3 The first heat exchange section 1121 and the second heat exchange section 1122 can be pipes or the like, and they are arranged side by side and separated from each other to avoid direct contact between the first refrigerant and the second refrigerant. The heat exchange effect between the first refrigerant and the second refrigerant is achieved by utilizing the contact between the first heat exchange section 1121 and the second heat exchange section 1122, or by placing a heat-conducting material between them.

[0060] The electric drive 113 may have an electric drive body and a cooling structure disposed on the electric drive body, wherein the second refrigerant circulates within the cooling structure to cool the electric drive body.

[0061] Taking disc motors and disc generators as examples, the cooling structure can be a cooling channel opened inside the motor housing. When the second refrigerant circulates within the cooling channel, it can carry away the heat generated by the motor windings and other heat-generating components. Alternatively, the cooling structure can be a pipe in contact with the motor housing.

[0062] Taking a battery pack as an example, the cooling structure can be a pipe that contacts the battery pack. The pipe can be spirally wound around the outside of the battery pack to increase the contact area between the two and improve the heat exchange efficiency.

[0063] It can be seen that the electric drive 113 omits the cooling water tank, radiator and cooling fan that are used to cool the cooling structure, and directly connects to the heat exchanger 112 of the air conditioner and uses the cooling capacity of the air conditioner for cooling, which simplifies the structure and reduces costs.

[0064] like Figure 2 and Figure 3 As shown, the number of heat exchangers 112 is one, and the number of electric drives 113 and the number of second heat exchange units 1122 are equal. Therefore, step (b3) includes:

[0065] Each of the electric drives 113 is connected in series to its corresponding second heat exchange unit 1122.

[0066] For example, when there are two electric drives 113, the heat exchanger 112 is provided with two second channels 1122 so that the second refrigerant circulates between each electric drive 113 and one second channel 1122. That is, it adopts an integrated setting, which makes the system more integrated, the structure more compact, and further reduces costs.

[0067] In another embodiment, the number of electric drives 113 and heat exchangers 112 is equal, and the number of second heat exchange sections 1122 in each heat exchanger 112 is one, thus step (b3) includes:

[0068] Each of the electric drives 113 is connected in series to the second heat exchange section 1122 of the corresponding heat exchanger 112.

[0069] For example, when there are two electric drives 113, each heat exchanger 112 has one second channel 1122, and each electric drive 113 circulates the second refrigerant with one heat exchanger 112 to control the heat dissipation of each electric drive 113.

[0070] The heat exchanger 112 can be a plate heat exchanger, which has the advantages of compact structure, large heat exchange area, and high heat exchange efficiency, thereby further improving cooling efficiency. The first heat exchange section 1121 and the second heat exchange section 1122 can be S-shaped, or the number of the first heat exchange section 1121 can be increased to extend the heat exchange area of ​​both, thereby improving the heat exchange capacity.

[0071] refer to Figure 2 The outdoor integrated unit 110 further includes a pump 115, which is connected to the circuit formed between the electric drive 113 and the second heat exchange section 1122 of the heat exchanger 112. The function of the pump 115 is to drive the second refrigerant and circulate it between the electric drive 113 and the second heat exchange section 1122.

[0072] refer to Figure 5 The outdoor integrated unit 110 can be arranged on the chassis 300 of the mixer truck and is located between the cab 200 and the mixing tank 410.

[0073] like Figure 2 , Figure 5 and Figure 6 As shown, the outdoor integrated unit 110 also includes a cabinet 500, and further includes the following between step (b1) and step (b3):

[0074] (b2) Install the condenser 111, compressor 114, expansion valve 116 and pump 115 onto the cabinet 500.

[0075] By integrating the condenser 111 and the compressor 114 onto the cabinet 500, they can be installed as a whole and quickly onto the mixer truck. This not only makes the structure more compact and reduces the floor space, but also facilitates modification, installation, and maintenance. The cabinet 500 can be arranged in layers so that the condenser 111 and heat exchanger 112 are arranged vertically to further reduce the floor space. The arrangement of the outdoor integrated unit 110 on the cabinet 500 can be customized according to design requirements.

[0076] like Figure 2 As shown, step (c) includes:

[0077] The first heat exchange unit 1121 is connected in parallel to both ends of the original evaporator 121'. Since the condenser 111, compressor 114, expansion valve 116 and pump 115 are integrated into the outdoor integrated unit 110, the first heat exchange unit 1121 can be directly connected in parallel to both ends of the original evaporator 121', thus improving the efficiency of the renovation.

[0078] like Figure 2 , Figures 4 to 6 As shown, the electric drive 113 includes at least one of the following:

[0079] Battery pack 113c, disc motor 113a, and disc generator 113b.

[0080] The battery pack 113c is electrically connected to the compressor 114, providing power for the compressor 114. Compared to a traditional engine-driven compressor, this eliminates the need for continuous engine operation, significantly reducing fuel consumption and lowering costs. Furthermore, the battery pack 113c is simultaneously cooled by the air conditioner's cooling capacity, eliminating the need for a complex battery cooling circuit, resulting in a more compact structure and further cost reduction. The battery pack 113c can also be mounted on the cabinet 500.

[0081] The disc motor 113a can be used as the electric drive for the mixing structure of the mixer truck, and the disc generator 113b can be used as the electric drive for the energy recovery system of the mixer truck. It is evident that the cooling capacity of the air conditioner is used to cool the disc motor 113a and the disc generator 113b, thereby simplifying the structure and reducing costs.

[0082] Specifically, the mixer truck includes a mixing superstructure 400, which includes a reducer 420, a disc motor 113a, and a mixing tank 410. The disc motor 113a is mounted on the reducer 420 and is connected to the mixing tank 410 of the mixer truck. The method further includes:

[0083] The disc motor 113a and the battery pack 113c are electrically connected so that the battery pack 113c supplies power to the disc motor 113a;

[0084] And / or, the mixer truck includes an energy recovery system 600, the energy recovery system 600 including an engine, a power take-off (PTO) 610 and a disc generator 113b, the disc generator 113b being mounted on the PTO 610, and the method further includes:

[0085] The disc generator 113b is electrically connected to the battery pack 113c to recover energy from the engine and charge the battery pack 113c. In summary, the electric air conditioning retrofit method is based on the original vehicle air conditioner 100'. It discards the original compressor 114' and the original condenser 111' installed in different locations on the mixer truck, retains the original evaporator 121' located in the cab 200, and equips it with an outdoor integrated unit 110 that integrates the condenser 111 and compressor 114. Compared to a complete reconfiguration, this effectively reduces costs and eliminates the need to install the compressor 114 and condenser 111 individually; only the outdoor integrated unit 110 needs to be installed once. This not only reduces the number of retrofit steps but also makes the modified structure more compact, reducing floor space and facilitating installation and maintenance. Furthermore, the compressor 114 is powered by the electric drive 113, effectively reducing fuel consumption. The electric drive utilizes the circulating second refrigerant and the first refrigerant for heat exchange to achieve cooling. It can be seen that the electric drive uses the cooling capacity of the air conditioner for cooling, so there is no need to add an additional and complex cooling structure, simplifying the structure and reducing the cost of use.

[0086] The described electric air conditioning modification method can be applied to vehicles equipped with onboard air conditioning, such as concrete mixer trucks. Concrete mixer trucks can be further divided into fuel-powered and new energy-powered mixer trucks. Fuel-powered mixer trucks refer to those primarily driven by gasoline engines, modified by replacing some or all gasoline drives with electric drives, including replacing the gasoline drive of the mixing structure and energy recovery system with an electric drive driven by a disc motor. New energy-powered mixer trucks can be pure electric mixer trucks, characterized by low energy consumption, zero emissions, light weight, and strong power, while also significantly reducing noise pollution caused by diesel engines. Therefore, this invention protects the application of the electric air conditioning modification method in the fields of fuel-powered and new energy-powered mixer trucks.

[0087] like Figure 2 , Figures 4 to 6 As shown, the mixer truck includes:

[0088] An original vehicle air conditioner 100', wherein the original vehicle air conditioner 100' includes an original evaporator 121';

[0089] An outdoor integrated unit 110 includes a compressor 114 and a condenser 111, wherein the compressor 114, the condenser 111 and the original evaporator 121' are connected in series to form an air conditioning circuit;

[0090] At least one electric drive 113 is electrically connected to the compressor 114.

[0091] The original compressor 114' and condenser 111', which were installed in different locations on the mixer truck, are discarded. The original evaporator 121', located in the cab 200, is retained, and an outdoor integrated unit 110, which integrates the condenser 111 and compressor 114, is installed. Compared to a complete reconfiguration, this effectively reduces costs. Furthermore, it eliminates the need to install the compressor 114 and condenser 111 individually; only the outdoor integrated unit 110 needs to be installed once. This not only reduces the number of modification steps but also makes the modified structure more compact, reducing floor space and facilitating installation and maintenance. Additionally, the compressor 114 is powered by the electric drive 113, effectively reducing fuel consumption.

[0092] like Figure 2 and Figure 3 As shown, the outdoor integrated unit 110 further includes:

[0093] At least one heat exchanger 112, the heat exchanger 112 including at least one first heat exchange section 1121 and at least one second heat exchange section 1122 that are separated from each other and capable of exchanging heat, the first heat exchange section 1121 being connected in parallel to both ends of the original evaporator 121' so that the first refrigerant can circulate between the original evaporator 121', the condenser 111 and the first heat exchange section 1121; the electric drive 113 and the second heat exchange section 1122 being connected in series so that the second refrigerant can circulate between the electric drive 113 and the second heat exchange section 1122.

[0094] It is evident that the electric drive utilizes the cooling capacity of the air conditioner for cooling, thus eliminating the need for additional and complex cooling structures, simplifying the structure and reducing operating costs.

[0095] like Figures 3 to 5 As shown, the mixer truck also includes a chassis 300, a mixing superstructure 400, and an energy recovery system 600. The mixing superstructure 400 is fixed to the chassis 300 and located behind the cab 200. The energy recovery system 600 is fixed to the chassis 300.

[0096] The stirring device 400 includes a stirring tank 410 and a reducer 420. The stirring device 400 can be converted from oil-driven to electric-driven, for example, using a disc motor 113a. It is directly connected to the stirring tank 410 via the reducer 420 and supported on the housing of the reducer 420, allowing the disc motor 113a to drive the stirring tank 410 to rotate. This not only effectively reduces oil consumption but also utilizes the small axial dimension and lighter weight of the disc motor, enabling it to be directly supported on the housing of the reducer 420. Compared to traditional radial motors, this allows the housing of the reducer 420 to withstand the bending moment and shear force caused by the disc motor's own weight, preventing deformation and cracking during long-term operation. Therefore, there is no need to add a new support structure, and redesigning the housing or the integrated reducer motor is avoided, effectively reducing costs, extending service life, and simplifying installation and commissioning processes.

[0097] Furthermore, the disc motor 113a of the stirring device 400 can be cooled by the cooling capacity of the air conditioner, so there is no need to add an additional and complex cooling structure, resulting in higher integration and further reducing the cost of use.

[0098] The energy recovery system 600 includes an engine and a power take-off (PTO) 610. It employs a disc generator 113b, which is directly connected to the engine via the PTO 610 and supported on the PTO's housing surface to recover energy from the engine and charge the battery pack. Therefore, the energy recovered by the energy recovery system 600 can directly power the mixing superstructure 400 and the vehicle's air conditioning. The disc generator 113b is located on the chassis 300 and behind the cab 200, allowing it to be cooled using the air conditioning's cooling capacity, thus simplifying the structure and reducing costs.

[0099] To further explain, the power take-off 610 includes a power take-off body, an output shaft, and a flange. The power take-off body is connected to the flange via the output shaft, and the disc generator 113b is supported on the flange.

[0100] As can be seen from the above, the energy recovery system 600 can be applied to markets such as fuel-powered concrete mixer trucks and new energy-powered concrete mixer trucks. It can be seen that the energy recovery system 600 has a wide range of applications and is easy and quick to modify. It not only reduces the load on the motor of the original structure, but also uses the air conditioning of the concrete mixer truck for drive cooling, so as to ensure the reliability and stability of the product.

[0101] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The scope of patent application of the present invention should not be limited by these embodiments. That is, any equivalent changes or modifications made in accordance with the spirit disclosed in the present invention still fall within the patent scope of the present invention.

Claims

1. A method for retrofitting an electric air conditioner, used to retrofit the original onboard air conditioner (100') of a concrete mixer truck, characterized in that, The method includes the following steps: (a) Disconnect one original condenser (111') and one original compressor (114') of the original vehicle air conditioner (100'), and retain one original evaporator (121') of the original vehicle air conditioner. (b) Provide an outdoor unit (110) and at least one electric drive (113), the outdoor unit (110) including a condenser (111) and a compressor (114), the electric drive (113) and the compressor (114) being electrically connected; (c) The outdoor integrated unit (110) is directly installed on the mixer truck, and the original evaporator (121'), the condenser (111) and the compressor (114) are connected in series to form an air conditioning circuit; The electric drive (113) includes at least one of the following: Battery pack (113c), disc motor (113a), and disc generator (113b). The mixer truck includes a mixing superstructure (400), which includes a reducer (420), a disc motor (113a), and a mixing tank (410). The disc motor (113a) is mounted on the reducer (420) and is connected to the mixing tank (410) of the mixer truck. The method further includes: The disc motor (113a) and the battery pack (113c) are electrically connected so that the battery pack (113c) supplies power to the disc motor (113a); And / or, the mixer truck includes an energy recovery system (600), the energy recovery system (600) including an engine, a power take-off (610), and a disc generator (113b) mounted on the power take-off (610), the method further comprising: The disc generator (113b) is electrically connected to the battery pack (113c) to recover energy from the engine and charge the battery pack (113c).

2. The method for retrofitting an electric air conditioner as described in claim 1, characterized in that, The outdoor integrated unit (110) further includes at least one heat exchanger (112), the heat exchanger (112) including at least one first heat exchange section (1121) and at least one second heat exchange section (1122) that are separated from each other and capable of exchanging heat, and thus step (b) includes: (b1) The first heat exchange section (1121), the condenser (111) and the compressor (114) are connected in series so that the first refrigerant can circulate between the first heat exchange section (1121) and the condenser (111); (b3) The electric drive (113) and the second heat exchange unit (1122) are connected in series so that the second refrigerant can circulate between the electric drive (113) and the second heat exchange unit (1122).

3. The method for retrofitting an electric air conditioner as described in claim 2, characterized in that, The number of heat exchangers (112) is one, and the number of electric drives (113) and the number of second heat exchange units (1122) are equal. Therefore, step (b3) includes: Each of the electric drives (113) is connected in series to its corresponding second heat exchange unit (1122); Alternatively, the number of electric drives (113) and heat exchangers (112) is equal, and the number of second heat exchange sections (1122) in the heat exchangers (112) is one, thus step (b3) includes: Each of the electric drives (113) is connected in series to the second heat exchange section (1122) of the corresponding heat exchanger (112).

4. The method for retrofitting an electric air conditioner as described in claim 2, characterized in that, Step (c) includes: The first heat exchange unit (1121) is connected in parallel to both ends of the original evaporator (121').

5. The method for retrofitting an electric air conditioner as described in claim 1, characterized in that, In step (a), the original control panel of the original vehicle air conditioner (100') is retained so that in step (c), the compressor (114) and the original control panel are electrically connected so that the original control panel can control the compressor (114) to work.

6. A mixer truck, characterized in that, include: An original vehicle air conditioner (100') includes an original evaporator (121'). An outdoor integrated unit (110) includes a compressor (114) and a condenser (111), wherein the compressor (114), the condenser (111) and the original evaporator (121') are connected in series to form an air conditioning circuit; At least one electric drive (113) is electrically connected to the compressor (114); The electric drive (113) includes at least one of the following: Battery pack (113c), disc motor (113a), and disc generator (113b). The mixer truck includes a mixing superstructure (400), which includes a reducer (420), a disc motor (113a), and a mixing tank (410). The disc motor (113a) is mounted on the reducer (420) and is connected to the mixing tank (410) of the mixer truck. The mixer truck also includes: The disc motor (113a) and the battery pack (113c) are electrically connected so that the battery pack (113c) supplies power to the disc motor (113a); And / or, the mixer truck includes an energy recovery system (600), the energy recovery system (600) including an engine, a power take-off (610) and a disc generator (113b), the disc generator (113b) being mounted on the power take-off (610), and further including: The disc generator (113b) is electrically connected to the battery pack (113c) to recover energy from the engine and charge the battery pack (113c).

7. The mixer truck as described in claim 6, characterized in that, The outdoor integrated unit (110) also includes: At least one heat exchanger (112) includes at least one first heat exchange section (1121) and at least one second heat exchange section (1122) that are separated from each other and capable of exchanging heat. The first heat exchange section (1121) is connected in parallel to both ends of the original evaporator (121') so that the first refrigerant can circulate between the original evaporator (121'), the condenser (111) and the first heat exchange section (1121). The electric drive (113) and the second heat exchange section (1122) are connected in series so that the second refrigerant can circulate between the electric drive (113) and the second heat exchange section (1122).

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