Waste heat recovery system, method, and engineering machinery

Abstract

The present application relates to a waste heat recovery system, a method, and engineering machinery. The waste heat recovery system comprises a hydraulic device, a first three-way valve, a second three-way valve, a first heat exchanger, an oil radiator, an oil cooling system water pump, and a battery pack. A first valve port of the first three-way valve is communicated with one end of the hydraulic device, and a second valve port of the second three-way valve is communicated with the other end of the hydraulic device; the two ends of the first heat exchanger are respectively communicated with a third valve port of the first three-way valve and a first valve port of the second three-way valve; the two ends of the oil radiator are respectively communicated with a second valve port of the first three-way valve and a third valve port of the second three-way valve; one end of the oil cooling system water pump is connected to the first heat exchanger; and the two ends of the battery pack are respectively communicated with the other end of the oil cooling system water pump and the first heat exchanger.

Description

Waste heat recovery system, method and engineering machinery

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311819524.9 filed on December 26, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of engineering machinery, and in particular to a waste heat recovery system, method and engineering machinery. Background Art

[0004] At present, during the operation of engineering machinery, the heat generated by the hydraulic device is usually dissipated into the air through the radiator; when the ambient temperature is low, the battery needs to be heated, and the battery is usually heated by using the heat generated by the electric heating device. This will waste the heat generated by the hydraulic device. At the same time, the use of the electric heating device will also increase the energy consumption of the entire vehicle. The waste heat recovery system in the related art can use the heat generated by the hydraulic device to heat the battery pack to achieve the purpose of appropriately reducing heat waste. However, in the waste heat recovery system in the related art, when using the heat generated by the hydraulic device to heat the battery pack, the coolant carrying heat will pass through the radiator, and the radiator will absorb part of the heat, resulting in the heat generated by the hydraulic device cannot be fully utilized, resulting in heat waste.

[0005] Summary of the Invention

[0006] In order to solve the above technical problems, the embodiments of the present application provide a waste heat recovery system, method and engineering machinery, which can fully utilize the heat generated by the hydraulic device during operation, thereby reducing heat waste.

[0007] In a first aspect, a waste heat recovery system is provided, comprising:

[0008] Hydraulic device;

[0009] a first three-way valve, wherein a first valve port of the first three-way valve is connected to one end of the hydraulic device;

[0010] a second three-way valve, wherein a second valve port of the second three-way valve is connected to the other end of the hydraulic device;

[0011] a first heat exchanger, wherein two ends of the first heat exchanger are respectively connected to the third valve port of the first three-way valve and the first valve port of the second three-way valve;

[0012] an oil radiator, two ends of the oil radiator being connected to the second valve port of the first three-way valve and the third valve port of the second three-way valve respectively;

[0013] an oil dispersion system water pump, one end of which is connected to the first heat exchanger;

[0014] A battery pack, wherein two ends of the battery pack are respectively connected to the other end of the oil dispersion system water pump and the first heat exchanger.

[0015] According to the first aspect of the present application, the waste heat recovery system further includes:

[0016] a third three-way valve, wherein a first valve port of the third three-way valve is connected to one end of the battery pack;

[0017] a motor-controlled water pump, one end of which is connected to the third valve port of the third three-way valve;

[0018] a fourth three-way valve, wherein a first valve port of the fourth three-way valve is connected to the other end of the motor-controlled water pump;

[0019] a sixth three-way valve, wherein a first valve port of the sixth three-way valve is connected to one end of the battery pack;

[0020] a seventh three-way valve, wherein the first valve port of the seventh three-way valve is connected to the third valve port of the sixth three-way valve 10;

[0021] a water radiator, wherein both ends of the water radiator are respectively connected to the second valve port of the sixth three-way valve and the second valve port of the third three-way valve; and

[0022] The motor electronic control component has two ends respectively connected to the second valve port of the fourth three-way valve and the second valve port of the seventh three-way valve.

[0023] According to the first aspect of the present application, the waste heat recovery system further includes:

[0024] Evaporator assembly;

[0025] a first stop valve, wherein both ends of the first stop valve are respectively connected to the first heat exchanger and the evaporator assembly;

[0026] A second stop valve, one end of the second stop valve is connected to the evaporator assembly, and the other end of the second stop valve is connected to the oil dispersion system water pump.

[0027] According to the first aspect of the present application, the waste heat recovery system further includes:

[0028] A passenger compartment hot water pump, one end of the passenger compartment hot water pump is connected to one end of the evaporator assembly, the other end of the passenger compartment hot water pump is connected to the third valve port of the fourth three-way valve, and the other end of the evaporator assembly is connected to the third valve port of the seventh three-way valve.

[0029] According to the first aspect of the present application, the waste heat recovery system further includes:

[0030] a first expansion valve, one end of the first expansion valve being in communication with the evaporator assembly;

[0031] a first condenser, one end of the first condenser being in communication with the other end of the first expansion valve;

[0032] A passenger compartment refrigeration compressor, wherein two ends of the passenger compartment refrigeration compressor are respectively connected to the evaporator assembly and the first condenser.

[0033] According to the first aspect of the present application, the waste heat recovery system further includes:

[0034] a third stop valve, two ends of which are respectively connected to the battery pack and the first heat exchanger;

[0035] A fourth stop valve, both ends of which are connected to the battery pack and the oil dispersion system water pump respectively.

[0036] According to the first aspect of the present application, a battery circuit water pump, one end of which is in communication with the battery pack;

[0037] a second heat exchanger, one end of the second heat exchanger being in communication with the other end of the battery circuit water pump;

[0038] a fifth stop valve, wherein both ends of the fifth stop valve are connected to the second heat exchanger and the battery pack respectively;

[0039] a battery cooling compressor, one end of which is in communication with the second heat exchanger;

[0040] a second condenser, one end of the second condenser being in communication with the other end of the battery cooling compressor;

[0041] A second expansion valve, wherein both ends of the second expansion valve are respectively connected to the second condenser and the second heat exchanger.

[0042] In a second aspect, a waste heat recovery control method is further provided, which is applied to the waste heat recovery system as described in the previous embodiment. The waste heat recovery control method includes:

[0043] Controlling the first valve port and the third valve port of the first three-way valve to be open, and the second valve port to be closed;

[0044] controlling the first valve port and the second valve port of the second three-way valve to be open and the third valve port to be closed, so that the hydraulic device, the second three-way valve, the first three-way valve and the first heat exchanger form a first oil circulation loop;

[0045] The oil dissipation system water pump is controlled to be turned on so that the first heat exchanger, the oil dissipation system water pump, and the battery pack form a first heat dissipation circulation water path, so as to convert the oil heat generated by the hydraulic device into water heat to heat the battery pack.

[0046] According to the second aspect of the present application, the waste heat recovery system further includes:

[0047] a third three-way valve, wherein a first valve port of the third three-way valve is connected to one end of the battery pack;

[0048] a motor-controlled water pump, one end of which is connected to the third valve port of the third three-way valve;

[0049] a fourth three-way valve, wherein a first valve port of the fourth three-way valve is connected to the other end of the motor-controlled water pump;

[0050] a sixth three-way valve, wherein a first valve port of the sixth three-way valve is connected to one end of the battery pack;

[0051] a seventh three-way valve, wherein the first valve port of the seventh three-way valve is connected to the third valve port of the sixth three-way valve 10;

[0052] a water radiator, wherein both ends of the water radiator are respectively connected to the second valve port of the sixth three-way valve and the second valve port of the third three-way valve; and

[0053] a motor-electronic control component, wherein two ends of the motor-electronic control component are respectively connected to the second valve port of the fourth three-way valve and the second valve port of the seventh three-way valve;

[0054] Wherein, the waste heat recovery control method further includes:

[0055] Control the first valve port and the second valve port of the fourth three-way valve to be open, and the third valve port to be closed;

[0056] Controlling the first valve port and the third valve port of the third three-way valve to be open, and the second valve port to be closed;

[0057] Controlling the first valve port and the third valve port of the sixth three-way valve to be open, and the second valve port to be closed;

[0058] Controlling the first valve port and the second valve port of the seventh three-way valve to be open, and the third valve port to be closed;

[0059] Control the motor-controlled water pump to open so that the motor-controlled component, the seventh three-way valve, the sixth three-way valve, the battery pack, the third three-way valve, the motor-controlled water pump and the fourth three-way valve form a second heat dissipation circulation water circuit to convert the heat generated by the motor-controlled component into water heat to heat the battery pack.

[0060] According to the second aspect of the present application, the waste heat recovery system further includes:

[0061] Evaporator assembly;

[0062] a first stop valve, wherein both ends of the first stop valve are respectively connected to the first heat exchanger and the evaporator assembly;

[0063] A second stop valve, one end of the second stop valve is connected to the evaporator assembly, and the other end of the second stop valve is connected to the oil dispersion system water pump.

[0064] Wherein, the waste heat recovery control method further includes:

[0065] Controlling the first stop valve and the second stop valve to open;

[0066] The oil dispersion system water pump is controlled to be turned on so that the first heat exchanger, the oil dispersion system water pump, the first stop valve, the evaporator assembly, and the second stop valve form a third heat dissipation circulation water circuit, so as to convert the oil heat generated by the hydraulic device into water heat and provide heating heat for the evaporator assembly.

[0067] According to the second aspect of the present application, the waste heat recovery system further includes:

[0068] a passenger compartment hot water pump, one end of the passenger compartment hot water pump being connected to one end of the evaporator assembly, the other end of the passenger compartment hot water pump being connected to the third valve port of the fourth three-way valve, and the other end of the evaporator assembly being connected to the third valve port of the seventh three-way valve;

[0069] Wherein, the waste heat recovery control method further includes:

[0070] Controlling the second valve port and the third valve port of the fourth three-way valve to be open, and the first valve port to be closed;

[0071] Controlling the second valve port and the third valve port of the seventh three-way valve to be open, and the first valve port to be closed;

[0072] The passenger compartment hot water pump is controlled to open so that the motor electronic control component, the fourth three-way valve, the passenger compartment hot water pump, the evaporator assembly and the seventh three-way valve form a fourth heat dissipation circulation water circuit, so as to convert the heat generated by the motor electronic control component into water heat and provide heating heat to the evaporator assembly.

[0073] In a third aspect, an engineering machine is further provided, comprising:

[0074] The waste heat recovery system as described in the previous embodiment.

[0075] The waste heat recovery system, method, and engineering machinery provided in the embodiments of the present application control the oil radiator system water pump to open, so that a first heat exchanger, the oil radiator system water pump, and the battery pack form a first heat dissipation circulation water path. This converts the oil heat generated by the hydraulic device into water heat, which is then used to heat the battery pack. When utilizing the heat generated by the hydraulic device, the coolant does not pass through the oil radiator, preventing the oil radiator from absorbing some of the heat. All the heat generated by the hydraulic device is used to heat the battery pack, thereby fully utilizing the heat generated by the hydraulic device and effectively reducing heat waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The above and other purposes, features, and advantages of the present application will become more apparent through a more detailed description of the embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are intended to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0077] FIG1 is a schematic diagram of a waste heat recovery system provided by an exemplary embodiment of the present application;

[0078] FIG2 is a schematic diagram of a waste heat recovery system provided by another exemplary embodiment of the present application;

[0079] FIG3 is a schematic diagram of a waste heat recovery system provided by another exemplary embodiment of the present application;

[0080] FIG4 is a schematic diagram of a waste heat recovery system provided by another exemplary embodiment of the present application;

[0081] FIG5 is a schematic diagram of a waste heat recovery system provided by another exemplary embodiment of the present application;

[0082] FIG6 is a schematic flow chart of a waste heat recovery method provided by an exemplary embodiment of the present application;

[0083] FIG7 is a schematic flow diagram of a waste heat recovery method provided by another exemplary embodiment of the present application;

[0084] FIG8 is a schematic flow chart of a waste heat recovery method provided by another exemplary embodiment of the present application;

[0085] FIG9 is a schematic flow chart of a waste heat recovery method provided by another exemplary embodiment of the present application.

[0086] Figure numerals: 100-waste heat recovery system; 1-battery cooling compressor; 2-battery circuit water pump; 3-third three-way valve; 4-motor-controlled water pump; 5-fourth three-way valve; 6-passenger compartment hot water pump; 7-first expansion valve; 8-passenger compartment refrigeration compressor; 9-seventh three-way valve; 10-sixth three-way valve; 11-fifth stop valve; 12-second expansion valve; 13-first fan; 14-second fan; 15-third fan; 16-fourth fan; 17-first Three-way valve; 18-second three-way valve; 19-oil dispersion system water pump; 20-third stop valve; 21-first stop valve; 22-fourth stop valve; 23-second stop valve; 24-hydraulic device; 241-working device; 242-oil pump; 25-first heat exchanger; 26-battery pack; 27-motor electronic control component; 28-evaporator assembly; 29-water radiator; 30-oil radiator; 31-second heat exchanger; 32-first condenser; 33-second condenser. DETAILED DESCRIPTION

[0087] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described herein.

[0088] Figure 1 is a schematic diagram of a waste heat recovery system according to an exemplary embodiment of the present application. As shown in Figure 1 , the waste heat recovery system 100 according to the present embodiment may include a hydraulic device 24 . In practical applications, the hydraulic device 24 may be used to assist in performing various operations, such as walking and hoisting operations.

[0089] As shown in FIG. 1 , the hydraulic device 24 may include a working device 241 and an oil pump 242 . The oil pump 242 may drive hydraulic oil to move to the working device 241 , and then assist the working device 241 in performing corresponding operations.

[0090] As shown in Figure 1, the waste heat recovery system 100 may also include a first three-way valve 17, a second three-way valve 18, a first heat exchanger 25, an oil radiator 30, an oil dispersion system water pump 19 and a battery pack 26. The first valve port 171 of the first three-way valve 17 is connected to one end of the hydraulic device 24, the second valve port 182 of the second three-way valve 18 is connected to the other end of the hydraulic device 24, the two ends of the first heat exchanger 25 are respectively connected to the third valve port 173 of the first three-way valve 17 and the first valve port 181 of the second three-way valve 18, the two ends of the oil radiator 30 are respectively connected to the second valve port 172 of the first three-way valve 17 and the third valve port 183 of the second three-way valve 18, one end of the oil dispersion system water pump 19 is connected to the first heat exchanger 25, and the two ends of the battery pack 26 are respectively connected to the other end of the oil dispersion system water pump 19 and the first heat exchanger 25.

[0091] In actual application, the first valve port 171 and the third valve port 173 of the first three-way valve 17 are controlled to be open, and the second valve port 172 is closed; the first valve port 181 and the second valve port 182 of the second three-way valve 18 are controlled to be open, and the third valve port 183 is closed, so that the hydraulic device 24, the second three-way valve 18, the first three-way valve 17 and the first heat exchanger 25 form a first oil circulation loop.

[0092] In one embodiment, the hydraulic oil output by the oil pump passes through the hydraulic device 24. The hydraulic device 24 performs corresponding operations, and the hydraulic oil generates heat. The temperature of the hydraulic oil output from the hydraulic device 24 is relatively high. The hydraulic oil output from the hydraulic device 24 passes through the first heat exchanger 25. The coolant in the first heat exchanger 25 and the hydraulic oil can exchange heat, thereby reducing the temperature of the hydraulic oil. The hydraulic oil output from the first heat exchanger 25 can return to the hydraulic device 24 again.

[0093] In one embodiment, the first heat exchanger 25 may include a tubular heat exchanger, a plate heat exchanger, etc.

[0094] As shown in Figure 1, the battery pack 26 can provide electrical energy for the electrical components in the construction machinery. It should be understood that in the case of low ambient temperature, in order to ensure that the battery pack 26 is at a better operating temperature, the battery pack 26 needs to be heated.

[0095] Specifically, controlling the oil cooling system water pump 19 to open allows the first heat exchanger 25, the oil cooling system water pump 19, and the battery pack 26 to form a first heat dissipation circulation water path. Thus, the hydraulic oil output by the hydraulic device 24 is input into the first heat exchanger 25, where the hydraulic oil and coolant exchange heat. The oil cooling system water pump 19 can then transport the coolant in the first heat exchanger 25 to the battery pack 26, converting the oil heat generated by the hydraulic device 24 into water heat. This heat is then used to heat the battery pack 26.

[0096] It should be understood that the waste heat recovery system 100 provided in the embodiment of the present application controls the oil cooling system water pump 19 to be turned on, so that the first heat exchanger 25, the oil cooling system water pump 19, and the battery pack 26 form a first heat dissipation circulation water path. This converts the oil heat generated by the hydraulic device 24 into water heat, which is then used to heat the battery pack 26. When the heat generated by the hydraulic device 24 is utilized, the coolant does not pass through the oil radiator 30, preventing the oil radiator 30 from absorbing some of the heat. All the heat generated by the hydraulic device 24 is used to heat the battery pack 26, thereby fully utilizing the heat generated by the hydraulic device 24 and effectively reducing heat waste.

[0097] As shown in Figure 1, the waste heat recovery system 100 can also include a third three-way valve 3, a motor-controlled water pump 4, a fourth three-way valve 5, a sixth three-way valve 10, a seventh three-way valve 9, a water radiator 29 and a motor-controlled component 27. The first valve port 31 of the third three-way valve 3 is connected to one end of the battery pack 26; one end of the motor-controlled water pump 4 is connected to the third valve port 33 of the third three-way valve 3; the first valve port 51 of the fourth three-way valve 5 is connected to the other end of the motor-controlled water pump 4; the first valve port 101 of the sixth three-way valve 10 is connected to one end of the battery pack 26; the first valve port 91 of the seventh three-way valve 9 is connected to the third valve port 103 of the sixth three-way valve 10; the two ends of the water radiator 29 are respectively connected to the second valve port 102 of the sixth three-way valve 10 and the second valve port 32 of the third three-way valve 3; the two ends of the motor-controlled component 27 are respectively connected to the second valve port 52 of the fourth three-way valve 5 and the second valve port 92 of the seventh three-way valve 9.

[0098] It should be noted that the motor and electronic control assembly 27 can be used to issue control instructions to control the operation of the entire construction machinery. It should be understood that the motor and electronic control assembly 27 will generate a large amount of heat during operation.

[0099] In actual application, the first valve port 51 and the second valve port 52 of the fourth three-way valve 5 are controlled to be open, and the third valve port 53 is closed; the first valve port 31 and the third valve port 33 of the third three-way valve 3 are controlled to be open, and the second valve port 32 is closed; the first valve port 101 and the third valve port 103 of the sixth three-way valve 10 are controlled to be open, and the second valve port 102 is closed; the first valve port 91 and the second valve port 92 of the seventh three-way valve 9 are controlled to be open, and the third valve port is closed; and the motor-controlled water pump 4 is controlled to be opened, so that the motor-controlled assembly 27, the seventh three-way valve 9, the sixth three-way valve 10, the battery pack 26, the third three-way valve 3, the motor-controlled water pump 4 and the fourth three-way valve 5 form a second heat dissipation circulation water path. In this way, the motor-controlled water pump 4 can drive the coolant through the motor-controlled assembly 27, and the coolant can absorb the heat generated by the motor-controlled assembly 27. Then, the coolant can pass through the battery pack 26, and the heat carried by the coolant can heat the battery pack 26.

[0100] It should be understood that after the heat generated by the motor and electronic control component 27 is converted into water heat, the coolant will not pass through the water radiator 29 during the process of heating the battery pack 26, so as to avoid the water radiator 29 absorbing part of the heat. All the heat generated by the motor and electronic control component 27 is used to heat the battery pack 26, thereby achieving the effect of fully utilizing the heat generated by the motor and electronic control component 27 and effectively reducing heat waste.

[0101] As shown in Figure 1, the waste heat recovery system 100 can also include an evaporator assembly 28, a first stop valve 21 and a second stop valve 23. The evaporator assembly 28 can heat or cool the passenger compartment. The two ends of the first stop valve 21 are respectively connected to the first heat exchanger 25 and the evaporator assembly 28; one end of the second stop valve 23 is connected to the evaporator assembly 28, and the other end of the second stop valve 23 is connected to the oil dispersion system water pump 19.

[0102] In actual application, the first stop valve 21 and the second stop valve 23 are controlled to be open; the oil dispersion system water pump 19 is controlled to be open, so that the first heat exchanger 25, the oil dispersion system water pump 19, the first stop valve 21, the evaporator assembly 28 and the second stop valve 23 form a third heat dissipation circulation water circuit.

[0103] Specifically, the oil dispersion system water pump 19 can drive the coolant through the first heat exchanger 25. Combined with the aforementioned first oil circulation loop, the coolant and the hydraulic oil exchange heat in the first heat exchanger 25. That is, the coolant can absorb the heat of the hydraulic oil output from the hydraulic device 24. Then the coolant can pass through the evaporator assembly 28. The evaporator assembly 28 uses the heat carried by the coolant to heat the passenger compartment to meet the heating needs of the passenger compartment.

[0104] It should be understood that after the oil heat generated by the hydraulic device 24 is converted into water heat, in the process of providing heating heat to the evaporator assembly 28, the coolant will not pass through the oil radiator 30, so as to avoid the water-oil radiator 30 absorbing part of the heat. All the heat generated by the hydraulic device 24 is used to heat the passenger compartment, thereby achieving the effect of fully utilizing the heat generated by the hydraulic device 24 and effectively reducing heat waste.

[0105] As shown in Figure 1, the waste heat recovery system 100 may include a passenger compartment hot water pump 6, one end of the passenger compartment hot water pump 6 is connected to one end of the evaporator assembly 28, the other end of the passenger compartment hot water pump 6 is connected to the third valve port 53 of the fourth three-way valve 5, and the other end of the evaporator assembly 28 is connected to the third valve port 93 of the seventh three-way valve 9.

[0106] In actual application, the second valve port 52 and the third valve port 53 of the fourth three-way valve 5 are controlled to open, and the first valve port 51 is closed; the second valve port 92 and the third valve port 93 of the seventh three-way valve 9 are controlled to open, and the first valve port 91 is closed; the passenger compartment hot water pump 6 is controlled to open, so that the motor electronic control component 27, the fourth three-way valve 5, the passenger compartment hot water pump 6, the evaporator assembly 28 and the seventh three-way valve 9 constitute a fourth heat dissipation circulation water circuit.

[0107] Specifically, the passenger compartment hot water pump 6 can drive the coolant through the motor electronic control component 27, the coolant can absorb the heat generated by the motor electronic control component 27, and then the coolant can pass through the evaporator assembly 28. The evaporator assembly 28 uses the heat carried by the coolant to heat the passenger compartment to meet the heating needs of the passenger compartment.

[0108] It should be understood that after the heat generated by the motor and electronic control component 27 is converted into water heat, in the process of providing heating heat to the evaporator assembly 28, the coolant will not pass through the water radiator 29, so as to avoid the water radiator 29 absorbing part of the heat. All the heat generated by the motor and electronic control component 27 is used to heat the passenger compartment, thereby achieving the effect of fully utilizing the heat generated by the motor and electronic control component 27 and effectively reducing heat waste.

[0109] In one embodiment, FIG2 is a schematic diagram of a waste heat recovery system provided by another exemplary embodiment of the present application. When the ambient temperature of the construction machinery is below a preset temperature value (which can be set according to actual conditions, for example, the preset temperature value is 5°C), the battery pack 26 cannot be maintained within the optimal operating temperature range, and the battery pack 26 needs to be heated. In this case, as shown in FIG2 , the first heat dissipation circulation water circuit is connected (the connection process can be referred to in the previous description) and the second heat dissipation circulation water circuit is connected (the connection process can be referred to in the previous description). This allows full utilization of the heat generated by the hydraulic device 24 and the motor electronic control assembly 27. That is, the coolant does not pass through the oil radiator 30 and the water radiator 29, preventing the oil radiator 30 and the water radiator 29 from absorbing some of the heat. All the heat generated by the hydraulic device 24 and the motor electronic control assembly 27 is used to heat the battery pack 26, thereby fully utilizing the heat generated by the motor electronic control assembly 27 and the hydraulic device 24 and effectively reducing heat waste.

[0110] In one embodiment, FIG3 is a schematic diagram of a waste heat recovery system provided by another exemplary embodiment of the present application. When the ambient temperature of the construction machinery is lower than a preset temperature value (which can be set according to actual conditions, for example, the preset temperature value is 5°C), there is a need to heat the passenger compartment. In this case, as shown in FIG3 , the third heat dissipation circulation water circuit and the fourth heat dissipation circulation water circuit are both connected. In this way, the heat generated by the hydraulic device 24 and the motor electronic control component 27 can be fully utilized, that is, the coolant will not pass through the oil radiator 30 and the water radiator 29, avoiding the oil radiator 30 and the water radiator 29 from absorbing part of the heat. All the heat generated by the motor electronic control component 27 and the hydraulic device 24 is used to heat the passenger compartment, thereby achieving the effect of fully utilizing the heat generated by the motor electronic control component 27 and the hydraulic device 24, effectively reducing heat waste.

[0111] In one embodiment, FIG4 is a schematic diagram of a waste heat recovery system provided by another exemplary embodiment of the present application. When the ambient temperature of the construction machinery is lower than a preset temperature value (which can be set according to actual conditions, for example, the preset temperature value is 5°C), the battery pack 26 cannot be in the optimal operating temperature range, and the battery pack 26 needs to be heated. At the same time, the passenger compartment needs to be heated. In this case, as shown in FIG4 , the first heat dissipation circulation water circuit is connected, and the heat generated by the hydraulic device 24 is used to heat the battery pack 26. All the heat generated by the hydraulic device 24 is used to heat the battery pack 26; as shown in FIG4 , the fourth heat dissipation circulation water circuit is connected, and the heat generated by the motor and electronic control component 27 is used to heat the passenger compartment. All the heat generated by the motor and electronic control component 27 is used to heat the passenger compartment.

[0112] In one embodiment, when the ambient temperature of the construction machinery is below a preset temperature value (which can be set based on actual conditions, for example, 5°C), the battery pack 26 cannot be maintained within the optimal operating temperature range, requiring heating of the battery pack 26 and, at the same time, heating of the passenger compartment. Alternatively, the second heat dissipation circuit can be connected to utilize heat generated by the motor and electronic control assembly 27 to heat the battery pack 26, while the third water circuit can be connected to utilize heat generated by the hydraulic device 24 to heat the passenger compartment.

[0113] FIG5 is a schematic diagram of a waste heat recovery system according to another exemplary embodiment of the present application. As shown in FIG1 and FIG5 , waste heat recovery system 100 may further include a first expansion valve 7 , a first condenser 32 , and a passenger compartment refrigeration compressor 8 . One end of the first expansion valve 7 is connected to the evaporator assembly 28 , one end of the first condenser 32 is connected to the other end of the first expansion valve 7 , and both ends of the passenger compartment refrigeration compressor 8 are connected to the evaporator assembly 28 and the first condenser 32 , respectively.

[0114] Specifically, the evaporator assembly 28, the first expansion valve 7, the first condenser 32 and the passenger compartment refrigeration compressor 8 can form a first refrigerant circulation loop. The first expansion valve 7 can adjust the flow rate of the refrigerant in the first refrigerant circulation loop according to actual conditions to avoid the accumulation of refrigerant in the pipeline and cause the pipeline to burst.

[0115] As shown in Figure 5, when the ambient temperature is high, there is a cooling demand in the passenger compartment, so that the first refrigerant circulation loop is connected, and the passenger compartment refrigeration compressor 8 drives the refrigerant through the first condenser 32. The first condenser 32 cools the refrigerant, and then the refrigerant can pass through the evaporator assembly 28. The evaporator assembly 28 uses the refrigerant to cool the passenger compartment and meet the cooling demand in the passenger compartment.

[0116] As shown in Figures 1 and 5, the waste heat recovery system 100 may also include a battery circuit water pump 2, a second heat exchanger 31, a fifth stop valve 11, a battery cooling compressor 1, a second condenser 33 and a second expansion valve 12. One end of the battery circuit water pump 2 is connected to the battery pack 26, one end of the second heat exchanger 31 is connected to the other end of the battery circuit water pump 2, both ends of the fifth stop valve 11 are connected to the second heat exchanger 31 and the battery pack 26 respectively, one end of the battery cooling compressor 1 is connected to the second heat exchanger 31, one end of the second condenser is connected to the other end of the battery cooling compressor 1, and both ends of the second expansion valve 12 are connected to the second condenser 33 and the second heat exchanger 31 respectively.

[0117] Specifically, the battery cooling compressor 1, the second condenser 33, the second expansion valve 12 and the second heat exchanger 31 can form a second refrigerant circulation loop. The second expansion valve 12 can adjust the flow rate of the refrigerant in the second refrigerant circulation loop according to actual conditions to avoid the accumulation of refrigerant in the pipeline and cause the pipeline to burst.

[0118] Specifically, the battery circuit water pump 2, the second heat exchanger 31, the fifth shut-off valve 11, and the battery pack 26 form a fifth heat dissipation circulation circuit. As shown in Figure 5, when the ambient temperature is high and the battery pack 26 is operating at a high temperature, the battery circuit water pump 2 is controlled to open and the fifth shut-off valve 11 is closed. The coolant passing through the battery pack 26 carries a large amount of heat and then passes through the second heat exchanger 31. The refrigerant in the second heat exchanger 31 (operating in the second refrigerant circulation loop) and the coolant can exchange heat, thereby reducing the temperature of the hydraulic oil. The coolant output from the second heat exchanger 31 can then pass through the battery pack 26 again.

[0119] In one embodiment, the second heat exchanger 31 may include a tube heat exchanger, a plate-tube heat exchanger, or the like.

[0120] As shown in FIG5 , when the ambient temperature is high, it is necessary to dissipate heat from the motor electronic control assembly 27. The second valve port 32 and the third valve port 33 of the third three-way valve 3 are controlled to be closed, and the first valve port 31 is disconnected. The first valve port 51 and the second valve port 52 of the fourth three-way valve 5 are controlled to be closed, and the third valve port 53 is disconnected. The first valve port 91 and the second valve port 92 of the seventh three-way valve 9 are controlled to be closed, and the third valve port 93 is closed. The second valve port 102 and the third valve port 103 of the sixth three-way valve 10 are controlled to be closed, and the first valve port 101 is disconnected. In this way, the coolant can be cooled by the water radiator 29, and the cooled coolant can be used to dissipate heat from the motor electronic control assembly 27.

[0121] As shown in FIG5 , when the ambient temperature is high and heat dissipation is required for the battery pack 26, the first valve port 171 and the second valve port 172 of the first three-way valve 17 are closed, and the third valve port 173 is opened. The second valve port 182 and the third valve port 183 of the second three-way valve 18 are closed, and the first valve port 181 is opened. In this way, the oil radiator 30 can be used to cool the coolant, and the cooled coolant can be used to dissipate heat from the battery pack 26.

[0122] As shown in FIG1 , waste heat recovery system 100 may further include a third shut-off valve 20 and a fourth shut-off valve 22. The ends of third shut-off valve 20 are connected to battery pack 26 and first heat exchanger 25, respectively. The ends of fourth shut-off valve 22 are connected to battery pack 26 and oil dispersion system water pump 19, respectively. Third shut-off valve 20 controls whether battery pack 26 is connected to first heat exchanger 25 or not, while fourth shut-off valve 22 controls whether battery pack 26 is connected to oil dispersion system water pump 19 or not.

[0123] In actual applications, when it is necessary to connect the third heat dissipation circulation water circuit (the connection conditions can be referred to the previous introduction), the third stop valve 20 can be controlled to connect the battery pack 26 and the first heat exchanger 25, and the fourth stop valve 22 can be controlled to connect the battery pack 26 and the oil cooling system water pump 19.

[0124] As shown in FIG. 1 , the waste heat recovery system 100 may further include a first fan 13 . The first fan 13 is disposed opposite to the second condenser 33 . The first fan 13 may increase the condensation rate of the second condenser 33 .

[0125] As shown in FIG. 1 , the water radiator 29 and the oil radiator 30 are arranged side by side. The waste heat recovery system 100 may further include a second fan 14 . The second fan 14 may increase the heat dissipation rate of the water radiator 29 and the oil radiator 30 .

[0126] As shown in FIG1 , the waste heat recovery system 100 may further include a third fan 15 , which is disposed opposite to the evaporator assembly 28 . The third fan 15 may accelerate the flow rate of air near the evaporator assembly 28 , thereby improving the working efficiency of the evaporator assembly 28 .

[0127] As shown in FIG. 1 , the waste heat recovery system 100 may further include a fourth fan 16 . The fourth fan 16 is disposed opposite to the first condenser 32 . The fourth fan 16 may increase the condensation rate of the second condenser 32 .

[0128] FIG6 is a flow chart of a waste heat recovery method provided by an exemplary embodiment of the present application. As shown in FIG6 , the waste heat recovery method provided by the embodiment of the present application can be applied to the waste heat recovery system described in the aforementioned embodiment. The waste heat recovery control method includes:

[0129] S810: Control the first valve port and the third valve port of the first three-way valve to be open, and the second valve port to be closed.

[0130] S820: Control the first valve port and the second valve port of the second three-way valve to open, and the third valve port to close, so that the hydraulic device, the second three-way valve, the first three-way valve and the first heat exchanger form a first oil circulation loop.

[0131] S830: Control the oil cooling system water pump to turn on, so that the first heat exchanger, the oil cooling system water pump, and the battery pack form a first heat dissipation circulation water path, so as to convert the oil heat generated by the hydraulic device into water heat to heat the battery pack.

[0132] The waste heat recovery method provided in the embodiment of the present application controls the oil dispersion system water pump 19 to open, so that the first heat exchanger 25, the oil dispersion system water pump 19, and the battery pack 26 constitute a first heat dissipation circulation water circuit, so as to convert the oil heat generated by the hydraulic device 24 into water heat to heat the battery pack 26. When the heat generated by the hydraulic device 24 during operation is utilized, the coolant will not pass through the oil radiator 30, so as to avoid the oil radiator 30 absorbing part of the heat. All the heat generated by the hydraulic device 24 is used to heat the battery pack 26, thereby achieving the effect of fully utilizing the heat generated by the hydraulic device 24 and effectively reducing heat waste.

[0133] FIG7 is a flow chart of a waste heat recovery method according to another exemplary embodiment of the present application. As shown in FIG7 , the waste heat recovery method may further include:

[0134] S840: Control the first valve port and the second valve port of the fourth three-way valve to be open, and the third valve port to be closed.

[0135] S850: Control the first valve port and the third valve port of the third three-way valve to be open, and the second valve port to be closed.

[0136] S860: Control the first valve port and the third valve port of the sixth three-way valve to be open, and the second valve port to be closed.

[0137] S870: Control the first valve port and the second valve port of the seventh three-way valve to open, and the third valve port to close.

[0138] S880: Control the motor electronically controlled water pump to open, so that the motor electronically controlled component, the seventh three-way valve, the sixth three-way valve, the battery pack, the third three-way valve, the motor electronically controlled water pump and the fourth three-way valve form a second heat dissipation circulation water path, so as to convert the heat generated by the motor electronically controlled component into water heat to heat the battery pack.

[0139] It should be understood that after the heat generated by the motor and electronic control component 27 is converted into water heat, the coolant will not pass through the water radiator 29 during the process of heating the battery pack 26, so as to avoid the water radiator 29 absorbing part of the heat. All the heat generated by the motor and electronic control component 27 is used to heat the battery pack 26, thereby achieving the effect of fully utilizing the heat generated by the motor and electronic control component 27 and effectively reducing heat waste.

[0140] In one embodiment, step S840 , step S850 , step S860 , step S870 , and step S880 may be performed after step S830 or before step S810 .

[0141] FIG8 is a flow chart of a waste heat recovery method provided by another exemplary embodiment of the present application. As shown in FIG8 , the waste heat recovery method further includes:

[0142] S890: Control the first stop valve and the second stop valve to open.

[0143] S900: Control the oil cooling system water pump to turn on, so that the first heat exchanger, the oil cooling system water pump, the first stop valve, the evaporator assembly, and the second stop valve form a third heat dissipation circulation water path, so as to convert the oil heat generated by the hydraulic device into water heat and provide heating heat to the evaporator assembly.

[0144] It should be understood that after the oil heat generated by the hydraulic device 24 is converted into water heat, in the process of providing heating heat to the evaporator assembly 28, the coolant will not pass through the oil radiator 30, so as to avoid the water-oil radiator 30 absorbing part of the heat. All the heat generated by the hydraulic device 24 is used to heat the passenger compartment, thereby achieving the effect of fully utilizing the heat generated by the hydraulic device 24 and effectively reducing heat waste.

[0145] In one embodiment, step S890 and step S900 may be performed after step S880 or before step S840.

[0146] FIG9 is a flow chart of a waste heat recovery method provided by another exemplary embodiment of the present application. As shown in FIG9 , the waste heat recovery method further includes:

[0147] S910: Control the second valve port and the third valve port of the fourth three-way valve to be open, and the first valve port to be closed.

[0148] S920: Control the second valve port and the third valve port of the seventh three-way valve to be open, and the first valve port to be closed.

[0149] S930: Control the passenger compartment hot water pump to turn on, so that the motor and electronic control assembly, the fourth three-way valve, the passenger compartment hot water pump, the evaporator assembly, and the seventh three-way valve form a fourth heat dissipation circulation water path, so as to convert the heat generated by the motor and electronic control assembly into water heat and provide heating heat to the evaporator assembly.

[0150] It should be understood that after the heat generated by the motor and electronic control component 27 is converted into water heat, in the process of providing heating heat to the evaporator assembly 28, the coolant will not pass through the water radiator 29, so as to avoid the water radiator 29 absorbing part of the heat. All the heat generated by the motor and electronic control component 27 is used to heat the passenger compartment, thereby achieving the effect of fully utilizing the heat generated by the motor and electronic control component 27 and effectively reducing heat waste.

[0151] In one embodiment, step S910 , step S920 , and step S930 may be performed after step S900 or before step S890 .

[0152] The embodiment of the present application further provides an engineering machine, which includes the aforementioned waste heat recovery system 100 and has all the functions of the waste heat recovery system 100. The effects of the engineering machine can refer to the effects of the aforementioned waste heat recovery system 100.

[0153] In one embodiment, the construction machinery may include an excavator, a crane, etc.

[0154] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0155] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0156] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0157] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0158] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A waste heat recovery system, wherein, The waste heat recovery system includes: A hydraulic device (24); A first three-way valve (17), and a first valve port (171) of the first three-way valve (17) is communicated with one end of the hydraulic device (24); A second three-way valve (18), and a second valve port (182) of the second three-way valve (18) is communicated with the other end of the hydraulic device (24); A first heat exchanger (25), and two ends of the first heat exchanger (25) are respectively communicated with a third valve port (173) of the first three-way valve (17) and a first valve port (181) of the second three-way valve (18); An oil radiator (30), and two ends of the oil radiator (30) are respectively connected with a second valve port (172) of the first three-way valve (17) and a third valve port (183) of the second three-way valve (18); An oil radiator system water pump (19), and one end of the oil radiator system water pump (19) is connected with the first heat exchanger (25); A battery pack (26), and two ends of the battery pack (26) are respectively communicated with the other end of the oil radiator system water pump (19) and the first heat exchanger (25).

2. The waste heat recovery system according to claim 1, wherein, The waste heat recovery system further includes: A third three-way valve (3), and a first valve port (31) of the third three-way valve (3) is communicated with one end of the battery pack (26); An electric motor electronic control water pump (4), and one end of the electric motor electronic control water pump (4) is communicated with a third valve port (33) of the third three-way valve (3); A fourth three-way valve (5), and a first valve port (51) of the fourth three-way valve (5) is communicated with the other end of the electric motor electronic control water pump (4); A sixth three-way valve (10), and a first valve port (101) of the sixth three-way valve (10) is communicated with one end of the battery pack (26); A seventh three-way valve (9), and a first valve port (91) of the seventh three-way valve (9) is communicated with a third valve port (103) of the sixth three-way valve (10); A water radiator (29), and two ends of the water radiator (29) are respectively communicated with a second valve port (102) of the sixth three-way valve (10) and a second valve port (32) of the third three-way valve (3); and An electric motor electronic control assembly (27), and two ends of the electric motor electronic control assembly (27) are respectively communicated with a second valve port (52) of the fourth three-way valve (5) and a second valve port (92) of the seventh three-way valve (9).

3. The waste heat recovery system according to claim 2, wherein, The waste heat recovery system further includes: An evaporator assembly (28); A first stop valve (21), and two ends of the first stop valve (21) are respectively communicated with the first heat exchanger (25) and the evaporator assembly (28); A second stop valve (23), one end of the second stop valve (23) is communicated with the evaporator assembly (28), and the other end of the second stop valve (23) is communicated with the oil radiator system water pump (19).

4. The waste heat recovery system according to claim 3, wherein, The waste heat recovery system further includes: The hot water pump (6) for the crew cabin, one end of the hot water pump (6) for the crew cabin is communicated with one end of the evaporator assembly (28), the other end of the hot water pump (6) for the crew cabin is communicated with the third valve port (53) of the fourth three-way valve (5), and the other end of the evaporator assembly (28) is communicated with the third valve port (93) of the seventh three-way valve (9).

5. The waste heat recovery system according to claim 3, wherein, The waste heat recovery system further includes: The first expansion valve (7), one end of the first expansion valve (7) is communicated with the evaporator assembly (28); The first condenser (32), one end of the first condenser (32) is communicated with the other end of the first expansion valve (7); The refrigeration compressor (8) for the crew cabin, both ends of the refrigeration compressor (8) for the crew cabin are respectively communicated with the evaporator assembly (28) and the first condenser (32).

6. The waste heat recovery system according to any one of claims 1 to 5, wherein, The waste heat recovery system further includes: The third stop valve (20), both ends of the third stop valve (20) are respectively communicated with the battery pack (26) and the first heat exchanger (25); The fourth stop valve (22), both ends of the fourth stop valve (22) are respectively communicated with the battery pack (26) and the oil cooling system water pump (19).

7. The waste heat recovery system according to any one of claims 1 to 6, wherein, The waste heat recovery system further includes: The battery circuit water pump (2), one end of the battery circuit water pump (2) is communicated with the battery pack (26); The second heat exchanger (31), one end of the second heat exchanger (31) is communicated with the other end of the battery circuit water pump (2); The fifth stop valve (11), both ends of the fifth stop valve (11) are respectively communicated with the second heat exchanger (31) and the battery pack (26); The battery cooling compressor (1), one end of the battery cooling compressor (1) is communicated with the second heat exchanger (31); The second condenser (33), one end of the second condenser is communicated with the other end of the battery cooling compressor (1); The second expansion valve (12), both ends of the second expansion valve (12) are respectively communicated with the second condenser (33) and the second heat exchanger (31).

8. A waste heat recovery control method is applied to the waste heat recovery system according to any one of claims 1 to 7, wherein, The waste heat recovery control method includes: Controlling the first valve port and the third valve port of the first three-way valve to be opened, and the second valve port to be closed; Controlling the first valve port and the second valve port of the second three-way valve to be opened, and the third valve port to be closed, so that the hydraulic device, the second three-way valve, the first three-way valve and the first heat exchanger form a first oil circulation loop; Controlling the oil cooling system water pump to be opened, so that the first heat exchanger, the oil cooling system water pump and the battery pack form a first heat dissipation circulation water path, so as to convert the oil heat generated by the hydraulic device into water heat and heat the battery pack.

9. The waste heat recovery control method according to claim 8, wherein, The waste heat recovery system further includes: The third three-way valve (3), the first valve port (31) of the third three-way valve (3) is communicated with one end of the battery pack (26); The motor electronic control water pump (4), one end of the motor electronic control water pump (4) is communicated with the third valve port (33) of the third three-way valve (3); The fourth three-way valve (5), the first valve port (51) of the fourth three-way valve (5) is communicated with the other end of the motor electronic control water pump (4); The sixth three-way valve (10), the first valve port of the sixth three-way valve (10) is communicated with one end of the battery pack (26); The seventh three-way valve (9), the first valve port (91) of the seventh three-way valve (9) is communicated with the third valve port (101) of the sixth three-way valve (10); The water radiator (29), both ends of the water radiator (29) are respectively communicated with the second valve port (102) of the sixth three-way valve (10) and the second valve port (32) of the third three-way valve (3); and The motor electric control assembly (27), both ends of the motor electric control assembly (27) are respectively communicated with the second valve port (52) of the fourth three-way valve (5) and the second valve port (92) of the seventh three-way valve (9); Wherein, the waste heat recovery control method further includes: Controlling the first valve port and the second valve port of the fourth three-way valve to be opened, and the third valve port to be closed; Controlling the first valve port and the third valve port of the third three-way valve to be opened, and the second valve port to be closed; Controlling the first valve port and the third valve port of the sixth three-way valve to be opened, and the second valve port to be closed; Controlling the first valve port and the second valve port of the seventh three-way valve to be opened, and the third valve port to be closed; Controlling the motor electric control water pump to be opened, so that the motor electric control assembly, the seventh three-way valve, the sixth three-way valve, the battery pack, the third three-way valve, the motor electric control water pump and the fourth three-way valve form a second heat dissipation circulation water path, to convert the heat generated by the motor electric control assembly into water heat and then heat the battery pack.

10. The waste heat recovery control method according to claim 9, wherein, The waste heat recovery system further includes: The evaporator assembly (28); The first stop valve (21), both ends of the first stop valve (21) are respectively communicated with the first heat exchanger (25) And the evaporator assembly (28) is communicated; The second stop valve (23), one end of the second stop valve (23) is communicated with the evaporator assembly (28), and the other end of the second stop valve (23) is communicated with the oil radiator system water pump (19). Wherein, the waste heat recovery control method further includes: Controlling the first stop valve and the second stop valve to be opened; Controlling the oil radiator system water pump to be opened, so that the first heat exchanger, the oil radiator system water pump, the first stop valve, the evaporator assembly and the second stop valve form a third heat dissipation circulation water path, to convert the oil heat generated by the hydraulic device into water heat and then provide heating heat for the evaporator assembly.

11. The waste heat recovery control method according to claim 10, wherein, The waste heat recovery system further includes: The passenger compartment hot water pump (6), one end of the passenger compartment hot water pump (6) is communicated with one end of the evaporator assembly (28), the other end of the passenger compartment hot water pump (6) is communicated with the third valve port (53) of the fourth three-way valve (5), and the other end of the evaporator assembly (28) is communicated with the third valve port (93) of the seventh three-way valve (9); Wherein, the waste heat recovery control method further includes: Controlling the second valve port and the third valve port of the fourth three-way valve to be opened, and the first valve port to be closed; Controlling the second valve port and the third valve port of the seventh three-way valve to be opened, and the first valve port to be closed; Control the opening of the hot water pump for the passenger compartment to form a fourth heat dissipation circulating water path with the motor electronic control assembly, the fourth three-way valve, the hot water pump for the passenger compartment, the evaporator assembly, and the seventh three-way valve, so as to convert the heat generated by the motor electronic control assembly into water heat and provide heating heat for the evaporator assembly.

12. An engineering machinery, wherein, The construction machinery includes: The waste heat recovery system according to any one of claims 1 to 7.

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