Overhead passenger car air conditioner electric control system

Abstract

An overhead passenger car air conditioner electric control system comprises an air conditioner bottom shell, an air conditioner top cover, an all-in-one power source controller, a compressor, a condenser assembly, an evaporator assembly, a low-pressure safety plate and an electric control box, the interior of the air conditioner bottom shell is divided into a condenser bin and an evaporator bin through a partition plate, and the all-in-one power source controller, the compressor and the condenser assembly are all installed in the condenser bin; the evaporator assembly, the low-pressure safety plate and the electric control box are all installed in the evaporator bin, an air conditioner return air inlet is formed in the middle of a bottom plate of the evaporator bin, the low-pressure safety plate and the electric control box are arranged at the air conditioner return air inlet, and the compressor, the condenser assembly and the evaporator assembly are sequentially connected in series end to end through pipelines. The all-in-one power controller and the electric control box are scientific in design and reasonable in structure, space cost and capital cost of the air conditioner are saved, the all-in-one power controller and the electric control box are good in heat dissipation effect and convenient to overhaul, time and labor are saved, and the electric control operation stability of the air conditioner is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted air conditioners, in particular to an overhead passenger car air conditioner electronic control system. Background Art

[0002] At present, most of the air conditioners in new energy buses are installed on the roof. They are exposed to the sun in summer and covered with snow in winter. The operating environment is harsh, which places high demands on the stability of the electronic control. Especially in summer, the electronic control operates in a high temperature environment at any time, and the operation of the electronic control components themselves is a heating process. If the heat dissipation of the electronic control cannot keep up, it may lead to poor operating stability and inability to exert rated capacity. Even worse, it may cause high-temperature fire accidents. Therefore, heat dissipation of the electronic control is a very important part of the electronic control design, especially for bus air conditioners, which operate in harsh conditions all year round.

[0003] Due to space limitations, the installation location of bus air-conditioning electronic controls is often relatively compact. In particular, several relatively large electronic control components (DCDC power supply, inverter, high-voltage box) are indispensable for new energy bus air-conditioning. Several large components occupy a certain installation space of the air-conditioning, making the entire air-conditioning layout more compact.

[0004] Due to the installation location limitations of the major air-conditioning components (DCDC power supply, inverter, high-voltage box), insufficient heat dissipation often occurs. In this case, the operating stability and even safety of the electronic control system are greatly affected. In the case of limited installation location of the electronic control of the air-conditioning in new energy buses, it is difficult to avoid the centralized arrangement of the electronic control high-voltage module and low-voltage module. If the electronic control is not well protected against interference, the operating stability of the entire electronic control system will be greatly affected.

[0005] Furthermore, maintenance personnel need to climb to the top of the bus and open the entire air-conditioning cover for maintenance, which is cumbersome and has certain safety hazards, especially when only replacing some air-conditioning wearing parts (air-conditioning fuses, contactors, etc.), which is time-consuming and laborious.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0007] The purpose of the utility model is to provide a roof-mounted passenger car air-conditioning electronic control system in view of the deficiencies in the prior art. The utility model has a scientific design and a reasonable structure, saves air-conditioning space cost and capital cost, and the all-in-one power controller and the electronic control box have good heat dissipation effect, are easy to repair, save time and effort, and improve the operating stability of the air-conditioning electronic control.

[0008] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: an overhead passenger car air-conditioning electronic control system, including an air-conditioning bottom shell with an open top, an air-conditioning top cover detachably installed on the upper end of the air-conditioning bottom shell, an all-in-one power controller, a compressor, a condenser assembly, an evaporator assembly, a low-voltage insurance plate and an electric control box, a partition is vertically arranged in the middle of the air-conditioning bottom shell along the left and right directions, the interior of the air-conditioning bottom shell is divided into a condenser bin and an evaporator bin by the partition front and back, the all-in-one power controller, the compressor and the condenser assembly are all installed in the condenser bin, the evaporator assembly, the low-voltage insurance plate and the electric control box are all installed in the evaporator bin, an air-conditioning return air port communicating with the interior of the car is opened in the middle of the bottom plate of the evaporator bin, the low-voltage insurance plate and the electric control box are arranged It is located at the air return outlet of the air conditioner, and a plurality of air conditioning air inlets communicating with the interior of the car are provided on the left and right sides of the bottom plate of the evaporator bin corresponding to the position of the evaporator assembly. The compressor, the condenser assembly and the evaporator assembly are connected in series end to end through pipelines. The air conditioning top cover is provided with condensation air outlets corresponding to the upper and lower parts of the condenser assembly. The front side plate of the air conditioning bottom shell, the left front part, the right front part and the middle front part of the air conditioning top cover are all provided with condensation air inlets communicating with the condenser bin. The multi-in-one power controller is electrically connected to the compressor and the low-voltage fuse board respectively, the electric control box is electrically connected to the bus power supply, the low-voltage fuse board is electrically connected to the condenser assembly and the evaporator assembly respectively, and the electric control box is signal-connected to the compressor, the condenser assembly and the evaporator assembly respectively.

[0009] Based on the above, the condenser assembly includes a condenser core and a plurality of condenser fans. The condenser core is installed on the front side of the condenser compartment, and each condenser fan is fixedly installed on the upper part of the condenser core. The low-voltage fuse plate is electrically connected to each condenser fan, and the electric control box is signal-connected to each condenser fan.

[0010] The all-in-one power controller and the compressor are installed at intervals on the left and right sides of the rear side of the condenser compartment, and the all-in-one power controller and the compressor are located on the rear side of the condensing core.

[0011] Based on the above, the evaporator assembly includes two evaporator cores, which are symmetrically arranged in the evaporator compartment and are respectively located on the left and right sides of the air-conditioning return air outlet. Evaporator fans are installed at all air-conditioning air inlets in the evaporator compartment. PTC electric heating plates are arranged on the left side of the left evaporator core and the right side of the right evaporator core. The multi-in-one power controller is electrically connected to the two PTC electric heating plates respectively, the low-voltage fuse plate is electrically connected to each evaporator fan respectively, and the electrical control box is signal-connected to each evaporator fan and the two PTC electric heating plates respectively.

[0012] Based on the above, a heat transfer base located above the return air outlet of the air conditioner is installed on the rear side of the middle of the bottom of the evaporator compartment, and the low-voltage fuse plate and the electric control box are both installed on the heat transfer base.

[0013] Based on the above, two evaporation cores are connected in parallel to form an evaporation core group, and the compressor, the condensation core, and the evaporation core group are connected in series end to end through pipelines in sequence.

[0014] Based on the above, a maintenance opening corresponding to the multi-functional power controller is provided on the air conditioner top cover.

[0015] Based on the above, the multi-functional power controller integrates a DCDC power supply, a frequency converter, and a high-voltage box.

[0016] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model has the following beneficial effects:

[0017] (1) The utility model adopts a multi-functional power controller, which integrates a DCDC power supply, a frequency converter, and a high-voltage box, saving the space cost and capital cost of the air conditioner.

[0018] (2) The multi-functional power controller is installed in the condenser compartment, and the heat dissipation characteristics of the condensation fan sucking air outwards are used to dissipate heat from the operating multi-functional power controller, meeting the heat dissipation requirements of the multi-functional power controller. There is no need to additionally increase the heat dissipation fan for the multi-functional power controller. The condensation fan has a large air volume and excellent heat dissipation effect, ensuring the operating stability of the multi-functional power controller.

[0019] (3) The electric control box is placed at the air return opening of the air conditioner, communicating with the environment inside the carriage. In summer, the refrigeration environment inside the carriage can be used to cool the electric control box; moreover, the return air formed by the evaporation fan can be used to dissipate heat from the operating electric control box, ensuring that the electric control box is always at an appropriate temperature and ensuring the operating stability of the electric control box.

[0020] (4) The low-voltage fuse board (a vulnerable part of the air conditioner) is placed at the air return opening of the air conditioner. Subsequently, maintenance personnel can directly disassemble and replace the low-voltage fuse board through the air return opening of the air conditioner inside the vehicle, which is convenient for operation, saving time and effort.

[0021] (5) A maintenance opening is provided on the air conditioner top cover above the multi-functional power controller. Subsequently, maintenance personnel can quickly perform maintenance, disassembly, and replacement of the multi-functional power controller without disassembling the air conditioner top cover.

[0022] (6) The multi-functional power controller (the high-voltage module of the air conditioner electric control) and the low-voltage fuse board and the electric control box (the low-voltage module of the air conditioner electric control) are arranged in separate areas, that is, respectively arranged in the condenser compartment and the evaporator compartment, avoiding mutual interference and improving the operating stability of the air conditioner electric control.

[0023] In summary, the utility model is scientifically designed, with a reasonable structure, saving the space cost and capital cost of the air conditioner. The multi-functional power controller and the electric control box have good heat dissipation effects, are convenient for maintenance, saving time and effort, and improving the operating stability of the air conditioner electric control. Description of the Drawings

[0024] Figure 1 It is a top view of the utility model, omitting the air conditioner top cover.

[0025] Figure 2 It is an axonometric view of the utility model, omitting the air conditioner top cover and the PTC electric heating plate.

[0026] Figure 3 It is a schematic diagram of the utility model in a top view of the downwind direction, omitting the air conditioner top cover, the all-in-one power controller, the compressor, the low-voltage fuse board, the electric control box and the evaporating fan.

[0027] Figure 4 It is a schematic diagram of the distribution and electrical connection of various components of the utility model.

[0028] Figure 5 It is an electrical schematic diagram of the utility model.

[0029] In the figure: 1. Air conditioner bottom shell; 2. All-in-one power controller; 3. Compressor; 4. Low-voltage fuse board; 5. Electric control box; 6. Partition; 7. Condenser compartment; 8. Evaporator compartment; 9. Air conditioner return air outlet; 10. Air conditioner air inlet; 11. Condenser air inlet; 12. Condenser core; 13. Condenser fan; 14. Evaporator core; 15. Evaporator fan; 16. PTC electric heating plate; 17. Heat transfer base. DETAILED DESCRIPTION

[0030] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0031] like Figures 1-5As shown, a ceiling-mounted passenger car air-conditioning electronic control system includes an air-conditioning bottom shell 1 with an open top, an air-conditioning top cover detachably mounted on the upper end of the air-conditioning bottom shell 1, an all-in-one power controller 2, a compressor 3, a condenser assembly, an evaporator assembly, a low-voltage fuse plate 4 and an electric control box 5. A partition 6 is vertically arranged in the middle of the air-conditioning bottom shell 1 along the left-right direction. The interior of the air-conditioning bottom shell 1 is divided into a condenser bin 7 and an evaporator bin 8 by the partition 6. The all-in-one power controller 2, the compressor 3 and the condenser assembly are all mounted in the condenser bin 7. The evaporator assembly, the low-voltage fuse plate 4 and the electric control box 5 are all mounted in the evaporator bin 8. An air-conditioning return air vent 9 communicating with the interior of the car is opened in the middle of the bottom plate of the evaporator bin 8. The low-voltage fuse plate 4 and the electric control box 5 are arranged at the air-conditioning return air vent 9, a plurality of air-conditioning air inlets 10 communicating with the interior of the car are provided on the left and right sides of the bottom plate of the evaporator bin 8 corresponding to the position of the evaporator assembly, the compressor 3, the condenser assembly and the evaporator assembly are connected in series end to end through pipelines, and a condensation air outlet corresponding to the upper and lower parts of the condenser assembly is provided on the air-conditioning top cover, and a condensation air inlet 11 communicating with the condenser bin 7 is provided on the front side plate of the air-conditioning bottom shell 1, the left front part, the right front part and the middle front part of the air-conditioning top cover, the multi-in-one power controller 2 is electrically connected to the compressor 3 and the low-voltage fuse board 4 respectively, the electric control box 5 is electrically connected to the bus power supply, the low-voltage fuse board 4 is electrically connected to the condenser assembly and the evaporator assembly respectively, and the electric control box 5 is signal-connected to the compressor 3, the condenser assembly and the evaporator assembly respectively.

[0032] The condenser assembly includes a condenser core 12 and three condenser fans 13. The condenser core 12 is installed on the front side of the condenser compartment 7. Each condenser fan 13 is fixedly installed on the upper part of the condenser core 12. The low-voltage fuse plate 4 is electrically connected to each condenser fan 13, and the electric control box 5 is signal-connected to each condenser fan 13.

[0033] The all-in-one power controller 2 and the compressor 3 are installed at intervals on the left and right sides of the rear side of the condenser compartment 7, and the all-in-one power controller 2 and the compressor 3 are located on the rear side of the condensing core 12.

[0034] The evaporator assembly includes two evaporator cores 14, which are symmetrically arranged in the evaporator bin 8 and are respectively located on the left and right sides of the air-conditioning return air outlet 9. Evaporator fans 15 are installed at all air-conditioning air inlets 10 in the evaporator bin 8. PTC electric heating plates 16 are arranged on the left side of the left evaporator core 14 and the right side of the right evaporator core 14. The all-in-one power controller 2 is electrically connected to the two PTC electric heating plates 16 respectively, the low-voltage fuse board 4 is electrically connected to each evaporator fan 15 respectively, and the electric control box 5 is signal-connected to each evaporator fan 15 and the two PTC electric heating plates 16 respectively.

[0035] At the rear side of the middle part of the inner bottom of the evaporator bin 8, there is a heat transfer base 17 located above the air return opening 9 of the air conditioner. The low-voltage fuse board 4 and the electronic control box 5 are both installed on the heat transfer base 17.

[0036] Two evaporation cores 14 are connected in parallel to form a group of evaporation cores 14. The compressor 3, the condensation core 12, and the group of evaporation cores 14 are connected in series end to end through pipelines in sequence.

[0037] An inspection opening corresponding to the multi-functional power controller 2 is provided on the top cover of the air conditioner.

[0038] The multi-functional power controller 2 integrates a DCDC power supply, a frequency converter, and a high-voltage box. The multi-functional power controller 2, the compressor 3, the low-voltage fuse board 4, the electronic control box 5, the condensation core 12, the condensation fan 13, the evaporation core 14, the evaporation fan 15, and the PTC electric heating plate 16 are all prior arts. Their specific structures and working principles will not be elaborated here. The electronic control part of the present utility model is a conventional control technology and does not involve new computer programs.

[0039] As Figure 2 and Figure 3 shown, the arrows indicate the air flow directions in the condenser bin 7 and the evaporator bin 8. When the condensation fan 13 operates, the condenser bin 7 sucks air around the condensation fan 13 through the condensation air inlet 11 towards the center of the condensation fan 13, and finally discharges the air upward through the condensation air outlet. Since the multi-functional power controller 2 is located in the condenser bin 7, the heat dissipation of the multi-functional power controller 2 can be achieved by using the air suction of the condensation fan 13, ensuring the operation stability of the multi-functional power controller 2. Similarly, when the evaporation fan 15 operates, the evaporator bin 8 sucks air towards the two-side evaporation fans 15 through the air return opening 9 of the air conditioner. The air passes through the evaporation core 14, carries the cold quantity of the evaporation core 14, and finally blows back into the carriage through the evaporation fan 15 from the air inlet 10 of the air conditioner. The electronic control box 5 is placed at the air return opening 9 of the air conditioner, and the electronic control box 5 can be cooled by using the return air formed by the evaporation fan 15 passing through the air return opening 9 and the temperature of the carriage, ensuring the operation stability of the electronic control box 5.

[0040] The present utility model has the following beneficial effects:

[0041] (1) The present utility model adopts the multi-functional power controller 2, which integrates a DCDC power supply, a frequency converter, and a high-voltage box, saving the space cost and capital cost of the air conditioner.

[0042] (2) The multi-functional power controller 2 is installed in the condenser bin 7. By using the heat dissipation characteristic of the condensation fan 13 sucking air outward to dissipate heat for the operating multi-functional power controller 2, the heat dissipation requirement of the multi-functional power controller 2 is met. There is no need to additionally increase a heat dissipation fan for the multi-functional power controller 2. The condensation fan 13 has a large air volume and excellent heat dissipation effect, ensuring the operation stability of the multi-functional power controller 2.

[0043] (3) The electronic control box 5 is placed at the air return vent 9 of the air conditioner, which is connected to the environment inside the vehicle. In summer, the cooling environment inside the vehicle can be used to cool the electronic control box 5. In addition, the return air formed by the evaporating fan 15 can dissipate heat and cool the electronic control box 5 in operation, ensuring that the electronic control box 5 is always at a suitable temperature and ensuring the operating stability of the electronic control box 5.

[0044] (4) The low-voltage fuse plate 4 (a wearing part of the air conditioner) is placed at the air conditioner return air outlet 9. Subsequent maintenance personnel can directly remove and replace the low-voltage fuse plate 4 through the air conditioner return air outlet 9 in the vehicle, which is convenient to operate and saves time and effort.

[0045] (5) An inspection port is provided on the top cover of the air conditioner above the multi-in-one power controller 2, so that subsequent maintenance personnel can quickly inspect, disassemble and replace the multi-in-one power controller 2 without removing the top cover of the air conditioner.

[0046] (6) The all-in-one power controller 2 (air conditioner electronic control high voltage module), the low voltage fuse board 4 and the electronic control box 5 (air conditioner electronic control low voltage module) are arranged in different areas, namely, in the condenser compartment 7 and the evaporator compartment 8 respectively, to avoid mutual interference and improve the operating stability of the air conditioner electronic control.

[0047] Various other necessary air-conditioning components are installed on the pipeline, such as a one-way valve, a drying filter, a sight glass, a liquid supply valve, an expansion valve and a gas-liquid separator, etc. These are existing components of the air conditioner, and the specific structure and working principle will not be described in detail.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A ceiling-mounted passenger car air conditioning electronic control system, comprising an air conditioning bottom shell with an open top and an air conditioning top cover detachably mounted on the upper end of the air conditioning bottom shell, characterized in that: It also includes an all-in-one power controller, a compressor, a condenser assembly, an evaporator assembly, a low-voltage fuse board and an electric control box. A partition is vertically arranged in the middle of the air-conditioning bottom shell along the left and right directions. The interior of the air-conditioning bottom shell is divided into a condenser compartment and an evaporator compartment by the partition. The all-in-one power controller, the compressor and the condenser assembly are all installed in the condenser compartment. The evaporator assembly, the low-voltage fuse board and the electric control box are all installed in the evaporator compartment. An air-conditioning return air vent communicating with the interior of the car is opened in the middle of the bottom plate of the evaporator compartment. The low-voltage fuse board and the electric control box are arranged at the air-conditioning return air vent. The left and right sides of the bottom plate of the evaporator compartment are opened corresponding to the position of the evaporator assembly. There are several air-conditioning air inlets connected to the interior of the car. The compressor, condenser assembly and evaporator assembly are connected in series end to end through pipelines. The air-conditioning top cover is provided with condensation air outlets corresponding to the upper and lower parts of the condenser assembly. The front side panel of the air-conditioning bottom shell, the left front part, the right front part and the middle front part of the air-conditioning top cover are all provided with condensation air inlets connected to the condenser compartment. The all-in-one power controller is electrically connected to the compressor and the low-voltage fuse board respectively, the electronic control box is electrically connected to the bus power supply, the low-voltage fuse board is electrically connected to the condenser assembly and the evaporator assembly respectively, and the electronic control box is signal-connected to the compressor, the condenser assembly and the evaporator assembly respectively.

2. The overhead passenger car air conditioning electronic control system according to claim 1, characterized in that: The condenser assembly includes a condenser core and several condenser fans. The condenser core is installed on the front side of the condenser compartment. Each condenser fan is fixedly installed on the upper part of the condenser core. The low-voltage fuse plate is electrically connected to each condenser fan, and the electric control box is signal connected to each condenser fan. The all-in-one power controller and the compressor are installed at intervals on the left and right sides of the rear side of the condenser compartment, and the all-in-one power controller and the compressor are located on the rear side of the condensing core.

3. The overhead passenger car air conditioning electronic control system according to claim 2, characterized in that: The evaporator assembly includes two evaporator cores, which are symmetrically arranged in the evaporator compartment and located on the left and right sides of the air-conditioning return air outlet respectively. Evaporator fans are installed at all air-conditioning air inlets in the evaporator compartment. PTC electric heating plates are arranged on the left side of the left evaporator core and the right side of the right evaporator core. The all-in-one power controller is electrically connected to the two PTC electric heating plates respectively, the low-voltage fuse plate is electrically connected to each evaporator fan respectively, and the electric control box is signal-connected to each evaporator fan and the two PTC electric heating plates respectively.

4. The overhead passenger car air conditioning electronic control system according to claim 3, characterized in that: A heat transfer base located above the return air outlet of the air conditioner is installed at the rear side of the middle of the bottom of the evaporator compartment, and the low-voltage fuse plate and the electric control box are both installed on the heat transfer base.

5. The overhead passenger car air conditioning electronic control system according to claim 3, characterized in that: The two evaporation cores are connected in parallel to form an evaporation core group, and the compressor, the condensation core and the evaporation core group are connected in series end to end through pipelines.

6. The overhead passenger car air conditioning electronic control system according to any one of claims 1 to 5, characterized in that: The top cover of the air conditioner is provided with an inspection opening corresponding to the upper and lower parts of the all-in-one power controller.

7. The overhead passenger car air conditioning electronic control system according to any one of claims 1 to 5, characterized in that: The all-in-one power controller integrates a DCDC power supply, inverter and high voltage box.

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