Heating system for a commercial vehicle and commercial vehicle

Abstract

The utility model provides a kind of heating system for commercial vehicle and commercial vehicle, it is related to commercial vehicle technical field.The heating system includes heat pump heating unit, liquid heating heater, water heating radiator and circulating liquid pump;Heat pump heating unit is installed in the top of commercial vehicle passenger cabin, and heat pump heating unit and liquid heating heater are communicated by fluid to realize heat exchange;Water heating radiator is installed in the bottom of commercial vehicle passenger cabin, liquid heating heater and water heating radiator are communicated by fluid to form circulation loop, circulating liquid pump is installed between liquid heating heater and water heating radiator to drive air conditioning water along circulation loop flow.Heat can be emitted from the bottom of commercial vehicle passenger cabin during heating, and the purpose of evenly distributing heating heat is achieved by using hot air to float upwards, especially suitable for bus use, can greatly improve passenger comfort, and has refrigeration, battery thermal management, equipment defrosting, waste heat recovery and other functions.

Description

Technical Field

[0001] This utility model relates to the field of commercial vehicle technology, and in particular to a heating system for commercial vehicles and a commercial vehicle. Background Technology

[0002] Currently, in the bus air conditioning industry, conventional heat pump air conditioning systems generally adopt a configuration of roof-mounted air conditioners paired with bottom-mounted electric auxiliary heaters or fuel-fired heaters. Due to the natural rising of hot air, when warm air is delivered from the roof, it is difficult to effectively reach the bottom of the passenger compartment. This results in uneven heating in most electric air conditioning systems in the industry, where passengers experience overheating at the head and cold at the feet, severely impacting passenger comfort. It is particularly noteworthy that in low-temperature environments, the intervention of electric auxiliary heaters not only significantly increases system energy consumption, but their excessively high outlet air temperature further reduces thermal comfort. Utility Model Content

[0003] The purpose of this utility model is to provide a heating system and a commercial vehicle for use in commercial vehicles, so as to alleviate the technical problem of hot head and cold feet in the heating of commercial vehicles in the prior art.

[0004] In the first aspect, the heating system for commercial vehicles provided by this utility model includes: a heat pump heating unit, a liquid heat heater, a water-heated radiator, and a circulating liquid pump. The heat pump heating unit is installed on the top of the passenger compartment of the commercial vehicle, and the heat pump heating unit and the liquid heat heater are connected by fluid to achieve heat exchange. The water-heated radiator is installed at the bottom of the passenger compartment of the commercial vehicle. The liquid-heated heater is in fluid communication with the water-heated radiator to form a circulation loop. The circulating liquid pump is installed between the liquid-heated heater and the water-heated radiator to drive the air conditioning water to flow along the circulation loop.

[0005] In conjunction with the first aspect, this utility model provides a first possible implementation of the first aspect, wherein the heat pump heating unit includes: a water heating device and a refrigeration device; The water heating device and the liquid thermal heater achieve heat exchange through fluid communication; The refrigeration device is equipped with an air supply device directed toward the passenger compartment of the commercial vehicle.

[0006] In conjunction with the first possible implementation of the first aspect, this utility model provides a second possible implementation of the first aspect, wherein the heat pump heating unit further includes a battery thermal management device, and the water heating device and the cooling device are respectively connected to the battery assembly for heat transfer through the battery thermal management device.

[0007] In conjunction with the second possible implementation of the first aspect, this utility model provides a third possible implementation of the first aspect, wherein the water heating device, the cooling device and the battery thermal management device are integrated and installed inside the same cavity to form an integrated structure.

[0008] In conjunction with the first possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the heat pump heating unit further includes a defrosting device; The defrosting device is used to switch the circulation direction of the refrigeration device and to defrost using the heat from the condenser during the reverse circulation process.

[0009] In conjunction with the first possible implementation of the first aspect, this utility model provides a fifth possible implementation of the first aspect, wherein the heat pump heating unit is provided with an exhaust valve for discharging gas from the air conditioning water pipes of the heat pump heating unit.

[0010] In conjunction with the first aspect, this utility model provides a sixth possible implementation of the first aspect, wherein the liquid heat heater includes: a Freon heat exchange channel connected to the heat pump heating unit and an air conditioning water heat exchange channel connected to the water radiator, wherein the Freon heat exchange channel and the air conditioning water heat exchange channel are separated and thermally connected.

[0011] In conjunction with the first aspect, this utility model provides a seventh possible implementation of the first aspect, wherein the water-heated radiator includes: a first water-heating unit and a second water-heating unit, the first water-heating unit and the second water-heating unit being in fluid communication with the liquid heat heater respectively.

[0012] In conjunction with the seventh possible implementation of the first aspect, this utility model provides an eighth possible implementation of the first aspect, wherein the liquid heat heater has an inlet pipe, a first outlet pipe and a second outlet pipe, the first outlet pipe and the second outlet pipe are connected one-to-one to the first water heating unit and the second water heating unit, and the first water heating unit and the second water heating unit are respectively in fluid communication with the inlet pipe.

[0013] In conjunction with the eighth possible implementation of the first aspect, this utility model provides a ninth possible implementation of the first aspect, wherein the circulating liquid pump includes: a first liquid pump installed in the first outlet pipe and a second liquid pump installed in the second outlet pipe.

[0014] In conjunction with the eighth possible implementation of the first aspect, this utility model provides a tenth possible implementation of the first aspect, wherein the first water heating unit and the second water heating unit are installed one-to-one on both sides of the passenger compartment of the commercial vehicle.

[0015] Secondly, the commercial vehicle provided by this utility model is equipped with the heating system described in the first aspect.

[0016] The present invention provides the following beneficial effects: a heat pump heating unit is installed on the top of the passenger compartment of a commercial vehicle, and the heat pump heating unit and the liquid heat heater are connected by fluid to achieve heat exchange. A water-cooled radiator is installed at the bottom of the passenger compartment of the commercial vehicle. The liquid heat heater and the water-cooled radiator are connected by fluid to form a circulation loop. A circulating liquid pump is installed between the liquid heat heater and the water-cooled radiator to drive the air conditioning water to flow along the circulation loop. During heating, heat can be dissipated from the bottom of the passenger compartment of the commercial vehicle, and the purpose of uniform heat distribution is achieved by using hot air to rise. It is especially suitable for use in buses and can greatly improve passenger comfort.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A top view of a heating system for a commercial vehicle provided in an embodiment of this utility model; Figure 2 A schematic diagram of a heating system for a commercial vehicle provided in an embodiment of this utility model; Figure 3 A schematic diagram of a heat pump heating unit for a heating system provided in an embodiment of this utility model.

[0020] Icons: 100 - Heat pump heating unit; 110 - Hydronic heating device; 120 - Refrigeration device; 130 - Battery thermal management device; 140 - Air vent valve; 200 - Liquid heat heater; 201 - Inlet pipe; 202 - First outlet pipe; 203 - Second outlet pipe; 300 - Hydronic radiator; 310 - First hydronic heating unit; 320 - Second hydronic heating unit; 400 - Circulating liquid pump; 410 - First liquid pump; 420 - Second liquid pump. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are only used to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 and Figure 2 As shown in the figure, the heating system for commercial vehicles provided in this embodiment of the present invention includes: a heat pump heating unit 100, a liquid heat heater 200, a water radiator 300, and a circulating liquid pump 400; the heat pump heating unit 100 is installed on the top of the passenger compartment of the commercial vehicle, and the heat pump heating unit 100 and the liquid heat heater 200 are fluidly connected to achieve heat exchange; the water radiator 300 is installed at the bottom of the passenger compartment of the commercial vehicle, and the liquid heat heater 200 and the water radiator 300 are fluidly connected to form a circulation loop, and the circulating liquid pump 400 is installed between the liquid heat heater 200 and the water radiator 300 to drive the air conditioning water to flow along the circulation loop.

[0025] Among them, the heating system is particularly suitable for vehicles with large passenger cabins and high thermal comfort requirements, such as large buses, new energy logistics vehicles, or long-distance passenger vehicles. The heating system can adopt a "sky-refrigerant-ground-water" heat pump architecture design, that is, the top is an air and refrigerant heat exchange unit, and the bottom is a water circulation and air convection heat dissipation unit. Through the unified scheduling of heat and cold distribution by the heat pump unit, an integrated thermal management system with high efficiency and energy saving, precise temperature control, and multi-heat source coordinated management is achieved.

[0026] In this embodiment, the heat pump heating unit 100 is installed on the top of the passenger compartment of the commercial vehicle, usually integrated into the roof air conditioning compartment, which facilitates the layout of the air duct and maintenance; the water-cooled radiator 300 is installed on the bottom side wall area of ​​the passenger compartment, preferably near the passenger's feet, and uses the natural rising characteristics of hot air to achieve uniform heating from bottom to top; the heat pump heating unit 100 and the liquid heat heater 200 are fluidly connected and exchange heat through a high-temperature hot water pipe; the liquid heat heater 200 and the water-cooled radiator 300 form a closed air conditioning water circulation loop, and the circulating liquid pump 400 is set in this loop to drive the coolant (usually an aqueous solution of ethylene glycol) to flow continuously and complete the heat transfer.

[0027] In heating mode, the heat pump system operates in a reverse Carnot cycle. The compressor compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas, which is then introduced into the condenser (i.e., the water-side heat exchanger) through a four-way valve. This releases heat to heat the circulating medium in the water circuit. The heated water then enters the liquid heat heater 200, where its temperature is further increased before being delivered to the bottom water-heated radiator 300. Through convection heat exchange, it releases heat into the interior of the vehicle. The cooled return water is then piped back to the heat pump unit for reheating, forming a closed-loop cycle.

[0028] In cooling mode, the system switches the direction of the four-way valve, and the evaporator is located inside the top unit. It directly uses refrigerant evaporation to absorb heat and reduce the supply air temperature. Cool air is blown out from the top air outlet and evenly distributed along the longitudinal air duct of the carriage. At this time, the water circulation system can stop running or run at low speed to avoid unnecessary energy consumption.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the heat pump heating unit 100 includes the following functional modules: Water heating device 110: Used as a condenser, it transfers the heat released by the phase change of the refrigerant to the air conditioning water circuit under heating conditions. Its outlet is connected to the inlet of the liquid heat heater 200 to achieve primary heating. Refrigeration unit 120: includes components such as compressor, evaporator, expansion valve and air supply fan, and is equipped with air supply devices (such as centrifugal fan + air duct) directed towards the passenger compartment, and can independently perform refrigeration tasks in summer or transitional seasons; Battery thermal management device 130: It integrates an independent refrigerant branch or heat exchange plate, and is coupled to the main circulation through a bypass valve. It can adjust the battery pack temperature according to the instructions of the vehicle control system: it activates the cooling function in high temperature environment, and recovers the waste heat of the motor and electronic control device for battery preheating in low temperature environment.

[0030] In a preferred embodiment, the water-based heating element 110, the cooling element 120, and the battery thermal management element 130 are integrated and installed inside the same housing, forming a highly integrated top-mounted heat pump assembly. This integrated design not only saves space and reduces external piping connections, but also significantly improves the coefficient of performance (COP) and system reliability by sharing the compressor, control system, and power module.

[0031] In an optional implementation, the water heating device 110, the cooling device 120, and the battery thermal management device 130 can be packaged as independent functional modules. Each module is assembled and installed in the housing through standardized interfaces (electrical plugs, refrigerant quick connectors, and coolant flanges). This supports on-site replacement or upgrading of specific modules (e.g., replacing the PTC heating module with a superconducting thermal storage unit), improving maintenance convenience and platform versatility.

[0032] In addition, to ensure stable operation under extreme winter weather conditions, the heat pump heating unit 100 is also equipped with a defrosting device, which is essentially a reverse circulation control system. When frost is detected on the surface of the external heat exchanger (which can be determined by a differential pressure sensor, current fluctuation, or time accumulation), the controller automatically switches the direction of the four-way valve, turning the outdoor unit, which was originally an evaporator, into a condenser. The system then uses the heat stored inside to quickly melt the frost layer, and after completion, it resumes the normal heating mode.

[0033] To prevent air from accumulating in the air conditioning water pipes, causing air blockage or water pump idling, the heat pump heating unit 100 is also equipped with an air vent valve 140, preferably an automatic float type air vent valve, which is located at the highest point of the water circuit to continuously discharge dissolved gases released during system operation, ensuring unobstructed water circulation.

[0034] See Figure 1 and Figure 2 The liquid heat heater 200 is a key energy relay device, which has two physically isolated but thermally connected flow channels: one is a Freon heat exchange flow channel, and the other is an air conditioning water heat exchange flow channel.

[0035] The Freon heat exchange channel is connected to the water heating device 110 of the heat pump heating unit 100 to receive high-temperature heat from the heat pump; the air conditioning water heat exchange channel and the water heating radiator 300 form a circulation loop, responsible for releasing heat to the cabin environment.

[0036] These two flow channels achieve efficient heat conduction through metal partitions or brazed plate heat exchange structures, ensuring complete separation of refrigerant and coolant to prevent contamination, while also achieving rapid heat exchange efficiency. Since the output water temperature of the heat pump fluctuates due to ambient temperature, the liquid heat heater acts as a "heat storage buffer" and "secondary temperature booster." Especially in extremely cold conditions, it can work in conjunction with a PTC auxiliary heating element (which can be built into the liquid heat heater) to ensure the outlet water temperature remains stable within the set range (e.g., 55 to 65°C).

[0037] In one specific embodiment, the liquid heat heater 200 has an inlet pipe 201 and two independent outlet pipes: a first outlet pipe 202 and a second outlet pipe 203. After the high-temperature water flows in through the inlet pipe, it is evenly distributed to the two outlets internally, supplying the water-heating radiator groups on the left and right sides respectively.

[0038] In an optional embodiment, a phase change material (PCM) heat storage layer (such as paraffin or salt hydrate) is added inside the liquid heat heater 200: the PCM is encapsulated between metal fins and located between the Freon flow channel and the air conditioning water flow channel; it absorbs and stores excess heat during the high-efficiency operation of the heat pump; it releases heat when the ambient temperature drops suddenly or the compressor stops, maintaining a stable outlet water temperature; it can reduce the number of PTC start-up times, extend its lifespan, and further save energy.

[0039] In an optional embodiment, the water-heated radiator 300 includes a first water-heating unit 310 and a second water-heating unit 320, which are respectively installed in the bottom areas of the left and right sides of the passenger compartment of the commercial vehicle, preferably arranged symmetrically to achieve a balanced heat field. Each water-heating unit consists of multiple parallel finned tube or flat tube heat dissipation units, which have a large heat exchange area and low wind resistance characteristics.

[0040] In an optional implementation, in addition to the bottom sidewall arrangement, some components of the water-heated radiator 300 can be extended to: below the seat, below the windshield, and the inner wall of the top air duct with microchannel heat dissipation strips attached.

[0041] Among them, the embedded heat sink under the seat provides localized enhanced heating to the passenger's foot area; the auxiliary heat dissipation strip under the windshield prevents fogging in winter and also provides dehumidification and antifreeze functions; the microchannel heat dissipation strip attached to the inner wall of the top air duct preheats the airflow during the start-up phase in extreme low temperatures, avoiding the feeling of cold air blowing.

[0042] In addition, miniature axial flow fans or piezoelectric fans can be installed in each water heating unit (such as under the seats or at the bottom of the side walls); the fans are dynamically started and stopped by the TCU based on passenger distribution sensors (infrared array or millimeter-wave radar); this achieves strong heating in occupied areas and low-power standby in unoccupied areas, further reducing heating energy consumption.

[0043] Each waterway is equipped with an independent circulating liquid pump: a first liquid pump 410 installed on the first outlet pipe 202 and a second liquid pump 420 installed on the second outlet pipe 203. The speed of each pump can be independently controlled by a central controller to achieve the following functions: The airflow is dynamically adjusted according to the difference in passenger density on the left and right sides of the carriage to avoid local overheating or underheating. If a blockage or malfunction occurs on one side, the corresponding water pump will be shut off, while the other side continues to receive heat. It supports time-sharing start-stop strategy, and can reduce energy consumption by combining timed ventilation or nighttime heat preservation mode.

[0044] The aforementioned dual-pump, dual-path design greatly enhances the system's flexibility and fault tolerance, making it particularly suitable for the refined temperature control needs in asymmetrical passenger carrying or complex operational scenarios.

[0045] In this embodiment, all components of the heating system are connected to the vehicle-mounted thermal management controller (TCU) to form a unified scheduling platform. The controller makes real-time decisions on the optimal operating strategy based on various sensor signals (such as indoor and outdoor temperature, humidity, CO2 concentration, battery SOC, motor waste heat status, etc.).

[0046] For example: when the outside temperature is above -5℃, the pure heat pump mode is activated first to maximize energy efficiency; when the temperature is below -10℃ and the battery needs to be preheated, the waste heat recovery mode is activated to use the waste heat generated by the drive system to preheat the coolant through the battery thermal management device 130, thereby reducing the heat pump load; if the heat pump efficiency drops significantly, the PTC auxiliary heating in the liquid heat heater 200 is activated as a supplementary heat source; during cooling, the battery cooling demand is assessed simultaneously to determine whether to activate the dual evaporator or multi-stage cooling process.

[0047] It is worth mentioning that, since the entire system is a fully enclosed integrated design with no external cold or heat sources to interfere with it, and all energy flow is controlled by the roof-mounted heat pump unit, the system has high stability and strong anti-interference ability, which can effectively improve the thermal comfort experience of the passenger cabin.

[0048] In an optional embodiment, the liquid heat heater 200 may also support a bidirectional heat exchange mode. By setting a bidirectional reversing valve assembly, the liquid heat heater can switch between the following two modes: Conventional mode: Heating is achieved by sequentially transferring heat through a heat pump, liquid heat heater, and radiator; Reverse mode: When the crew cabin is overheated and needs to be cooled down quickly, the external low-temperature environment is used as a cold source. The coolant is first cooled naturally by the radiator and then flows back into the liquid heat heater to exchange heat with the high-temperature refrigerant and achieve the cooling function.

[0049] In response to the high waste heat output characteristic unique to hydrogen fuel cell vehicles, the fuel cell stack cooling circuit can be connected to an additional heat exchange channel of the liquid heat heater, using 80 to 90°C high-temperature coolant to directly participate in the heating of the passenger compartment, reducing the heat pump running time; under medium load conditions, the heat pump can be completely shut off, relying entirely on waste heat for heating, achieving zero-power heating.

[0050] The commercial vehicle provided in this embodiment of the utility model is equipped with the aforementioned heating system. The integrated heat pump heating unit 100 is integrated on the top of the vehicle, and multiple water-heated radiator units are arranged along both sides of the passenger compartment at the bottom. The thermal management of the entire vehicle is coordinated by a single control unit. Compared with the traditional method of using engine waste heat for heating in fuel vehicles, this system eliminates the dependence on engine heat sources and is particularly suitable for pure electric or hydrogen fuel cell commercial vehicles.

[0051] The heating system described in this embodiment and the commercial vehicle equipped with the heating system have the following technical advantages: 1. Compact structure and high integration: The heat pump, water heating and battery thermal management are integrated into the roof-mounted unit, saving chassis space and facilitating vehicle layout; 2. Excellent thermal comfort: Adopting the "air-to-ground fluorine and ground-to-water" design concept, cooling is from top to bottom and heating is from bottom to top, which conforms to the human body's thermal perception law; 3. Excellent energy efficiency: It mainly uses heat pumps and supplements PTC, supports waste heat recovery and frequency conversion regulation, and the comprehensive COP can reach more than 2.5; 4. Flexible control: Dual-pump zone control supports differentiated heating and fault redundancy; 5. Stable and reliable system: Fully enclosed centralized control system with strong anti-interference ability and low maintenance cost; 6. High scalability: It can seamlessly meet the thermal management requirements of the power system of new energy vehicles and is suitable for multiple vehicle platforms.

[0052] The aforementioned heating system and commercial vehicle not only solve the problems of high energy consumption, slow heating and poor comfort of existing commercial vehicle heating systems, but are also more suitable for new thermal management paradigms in electrified and intelligent transportation scenarios.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heating system for commercial vehicles, characterized in that, include: Heat pump heating unit (100), liquid heat heater (200), water radiator (300) and circulating liquid pump (400); The heat pump heating unit (100) is installed on the top of the passenger compartment of the commercial vehicle, and the heat pump heating unit (100) and the liquid heat heater (200) exchange heat through fluid communication; The water-heated radiator (300) is installed at the bottom of the passenger compartment of the commercial vehicle. The liquid-heated heater (200) and the water-heated radiator (300) are in fluid communication to form a circulation loop. The circulating liquid pump (400) is installed between the liquid-heated heater (200) and the water-heated radiator (300) to drive the air conditioning water to flow along the circulation loop.

2. The heating system for commercial vehicles according to claim 1, characterized in that, The heat pump heating unit (100) includes: a water heating device (110) and a refrigeration device (120). The water heating device (110) and the liquid heat heater (200) exchange heat through fluid communication; The refrigeration device (120) is equipped with an air supply device directed toward the passenger compartment of the commercial vehicle.

3. The heating system for commercial vehicles according to claim 2, characterized in that, The heat pump heating unit (100) also includes a battery thermal management device (130), and the water heating device (110) and the cooling device (120) are respectively connected to the battery module for heat transfer through the battery thermal management device (130).

4. The heating system for commercial vehicles according to claim 3, characterized in that, The water heating device (110), the cooling device (120), and the battery thermal management device (130) are integrated and installed inside the same cavity to form an integrated structure.

5. The heating system for commercial vehicles according to claim 2, characterized in that, The heat pump heating unit (100) also includes a defrosting device; The defrosting device is used to switch the circulation direction of the refrigeration device (120) and to defrost using the heat of the condenser during the reverse circulation process.

6. The heating system for commercial vehicles according to claim 2, characterized in that, The heat pump heating unit (100) is equipped with an exhaust valve (140) to discharge gas from the air conditioning water pipe of the heat pump heating unit (100).

7. The heating system for commercial vehicles according to claim 1, characterized in that, The liquid heat heater (200) includes: a Freon heat exchange channel connected to the heat pump heating unit (100) and an air conditioning water heat exchange channel connected to the water radiator (300), wherein the Freon heat exchange channel and the air conditioning water heat exchange channel are separated and thermally connected.

8. The heating system for commercial vehicles according to claim 1, characterized in that, The water-heated radiator (300) includes a first water-heating unit (310) and a second water-heating unit (320), wherein the first water-heating unit (310) and the second water-heating unit (320) are respectively in fluid communication with the liquid heat heater (200).

9. The heating system for commercial vehicles according to claim 8, characterized in that, The liquid heat heater (200) has an inlet pipe (201), a first outlet pipe (202) and a second outlet pipe (203). The first outlet pipe (202) and the second outlet pipe (203) are connected one-to-one to the first water heating unit (310) and the second water heating unit (320). The first water heating unit (310) and the second water heating unit (320) are respectively in fluid communication with the inlet pipe (201).

10. The heating system for commercial vehicles according to claim 9, characterized in that, The circulating liquid pump (400) includes: a first liquid pump (410) installed in the first outlet water pipeline (202) and a second liquid pump (420) installed in the second outlet water pipeline (203).

11. The heating system for commercial vehicles according to claim 9, characterized in that, The first water heating unit (310) and the second water heating unit (320) are installed on both sides of the passenger compartment of the commercial vehicle in a one-to-one correspondence.

12. A commercial vehicle, characterized in that, The commercial vehicle is equipped with a heating system as described in any one of claims 1 to 11.

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