Integrated electric air conditioning system for double-deck bus

Abstract

The utility model discloses an integrated electric air-conditioning system for a double-deck bus, which comprises an indoor cooling component, an outdoor cooling component, a first heat exchange component and a second heat exchange component, the indoor cooling component comprises an indoor compressor, the indoor compressor is connected with the first heat exchange component, the first heat exchange component cools the indoor space of the double-deck bus, and the indoor space comprises a driver area and a passenger area; the battery cooling assembly comprises a battery compressor, the battery compressor is connected with a second heat exchange assembly, a third heat exchange assembly and a battery pack, and the second heat exchange assembly is connected with the third heat exchange assembly through a plate heat exchanger; wherein the indoor cooling assembly and the battery cooling assembly are integrated in the same shell. According to the utility model, the indoor refrigeration of the double-deck bus can be independently carried out, the battery pack can also be independently cooled, the cooling capacity of a passenger area cannot be lost, the temperature of the battery pack is ensured, in addition, the compressor does not need to be frequently started and stopped when the bus is charged, and the service life of the compressor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile air conditioners, and in particular relates to an integrated electric air conditioner system for a double-decker bus. Background Art

[0002] With the continuous advancement of technology and the reduction of costs, the competitiveness of new energy buses is gradually increasing. Especially in some large cities and regions, new energy buses have gradually become an important part of public transportation. Compared with traditional buses, new energy buses have environmental advantages such as zero emissions and low noise, which helps to improve urban air quality and enhance the quality of life of residents.

[0003] The bus air conditioning system works on the principle of evaporative cooling and is mainly composed of a compressor, a condenser, an evaporator and a throttle valve. When the driver turns on the air conditioner, the system will adjust accordingly according to the temperature of the environment and season. The battery cooling of new energy buses mainly depends on the battery thermal management system, which is one of the key technologies to ensure the performance, safety and life of the battery. When the battery temperature is high, the thermal management system will effectively dissipate heat to prevent thermal runaway accidents. At present, the common cooling methods are air cooling or liquid cooling. Air cooling uses natural convection cooling, natural wind mechanical convection cooling and air conditioning cold air mechanical convection cooling. This solution has a simple structure and low cost, but the cooling capacity is small and the cooling efficiency is low. Liquid cooling uses a chiller to cool the battery, which has a good cooling effect, but it is expensive and occupies a large space.

[0004] For example, application number CN201821271092.7 discloses an electric bus integrated battery cooling air-conditioning system, in which the air-conditioning system includes a battery cooling system and a passenger compartment refrigeration system. The battery condensation system and the passenger compartment condensation system share the same condensation system. When the air conditioner cools the battery, the cooling capacity of the passenger area will be lost, and when the vehicle is parked for charging, the compressor will cause low-frequency operation, and the compressor will start and stop frequently, which will affect the service life and failure rate of the compressor. Utility Model Content

[0005] In order to solve the above technical problems, the utility model discloses an integrated electric air-conditioning system for a double-decker bus. The system can cool the interior of the double-decker bus alone, and can also cool the battery pack alone, without losing the cooling capacity in the passenger area. At the same time, the temperature of the battery pack is also guaranteed. In addition, the compressor does not need to be frequently started and stopped when the bus is charging, thereby increasing the service life of the compressor.

[0006] Specifically, the utility model discloses an integrated electric air conditioning system for a double-decker bus, comprising:

[0007] An indoor cooling assembly, the indoor cooling assembly comprising an indoor compressor, the indoor compressor being connected to a first heat exchange assembly, the first heat exchange assembly cooling the interior of the double-decker bus, the interior comprising a driver area and a passenger area;

[0008] A battery cooling assembly, the battery cooling assembly comprising a battery compressor, the battery compressor being connected to a second heat exchange assembly, a third heat exchange assembly and a battery pack, the second heat exchange assembly being connected to the third heat exchange assembly via a plate heat exchanger;

[0009] Wherein, the indoor cooling assembly and the battery cooling assembly are integrated in the same housing;

[0010] When the temperature of the battery pack is less than or equal to the set temperature, the third heat exchange component cools the battery pack; when the temperature of the battery pack exceeds the set temperature, the second heat exchange component cools the cooling medium of the third heat exchange component.

[0011] The interior cooling component provides cooling for the interior of the double-decker bus, and the battery cooling component provides cooling for the battery pack, and monitors and controls the temperature of the battery pack at all times. The second heat exchange component and the third heat exchange component cool the battery pack, thereby improving the cooling efficiency of the battery pack. In addition, the compressor does not need to be started and stopped frequently when the bus is charging, thereby increasing the service life of the compressor. On the other hand, the interior cooling component is integrated with the battery cooling component, which reduces the space occupied by the air-conditioning system and increases the space for passengers in the bus.

[0012] Furthermore, the first heat exchange component includes a first condenser, a dryer, a first expansion valve, a second expansion valve, a first evaporator and a second evaporator, one end of the first condenser is connected to the indoor compressor, and the other end is connected to the dryer, the first expansion valve, the second expansion valve and the dryer are connected in parallel, one end of the first evaporator is connected to the first expansion valve, and the other end is connected to the indoor compressor, one end of the second evaporator is connected to the second expansion valve, and the other end is connected to the indoor compressor.

[0013] Furthermore, a high-pressure sensor and an oil-liquid separator are provided between the indoor compressor and the first condenser, a condensing temperature sensor is provided on the first condenser, a low-pressure sensor, a gas-liquid separator and an oil return capillary are provided between the indoor compressor and the first evaporator and the second evaporator, and the oil-liquid separator is connected to the oil return capillary.

[0014] Furthermore, the second heat exchange component includes a second condenser and a thermal expansion valve. One end of the second condenser is connected to the battery compressor, and the other end is connected to the thermal expansion valve. The thermal expansion valve is connected to the plate heat exchanger, and the plate heat exchanger is connected to the battery compressor.

[0015] Furthermore, the third heat exchange component includes a water pump and a water tank. The water pump, the battery pack and the plate heat exchanger are connected in series. The water outlet of the plate heat exchanger is provided with a water outlet temperature sensor, and the water inlet is provided with a water inlet temperature sensor; wherein,

[0016] The water tank is connected in parallel with the battery pack.

[0017] Furthermore, the shell is provided with an evaporator air outlet, a condenser air outlet, and a return air outlet. The evaporator air outlet and the return air outlet are both connected to the interior of the double-decker bus, and the condenser air outlet is connected to the atmosphere.

[0018] Furthermore, a fan is provided on one side of the condenser air outlet and the evaporator air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0020] Figure 1 This is the front view of a double-decker bus;

[0021] Figure 2 It is a side view of a double-decker bus;

[0022] Figure 3 It is the front view of the integrated electric air conditioning device;

[0023] Figure 4 It is a side view of the integrated electric air conditioning unit;

[0024] Figure 5 This is the rear view of the integrated electric air conditioning unit;

[0025] Figure 6 It is a cross-sectional view of the integrated electric air conditioning device BB;

[0026] Figure 7 It is the schematic diagram of the indoor cooling components;

[0027] Figure 8 This is a schematic diagram of the battery cooling assembly.

[0028] The reference numerals involved in the accompanying drawings are as follows: indoor cooling component 1, indoor compressor 11, pressure relief valve 101, high pressure sensor 102, oil-liquid separator 103, valve core 104, main return air temperature sensor 105, low pressure sensor 106, return oil capillary 107, gas-liquid separator 108, sight glass 109, first heat exchange component 12, first condenser 121, condensing temperature sensor 1211, dryer 122, first expansion valve 123, first evaporator 124, first Second expansion valve 125, second evaporator 126, auxiliary return air temperature sensor 1261, four-way valve 127, battery cooling assembly 2, battery compressor 21, second heat exchange assembly 22, second condenser 221, thermal expansion valve 222, plate heat exchanger 23, water inlet temperature sensor 231, water outlet temperature sensor 232, third heat exchange assembly 24, water tank 241, water pump 242, battery pack 25, shell 3, evaporator air outlet 31, condenser air outlet 32, return air outlet 33. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1-8 As shown, the utility model discloses an integrated electric air conditioning device for a double-decker bus, comprising an interior cooling component 1 and a battery cooling component 2;

[0031] The indoor cooling assembly 1 includes an indoor compressor 11, and the indoor compressor 11 is connected to a first heat exchange assembly 12, and the first heat exchange assembly 12 cools the interior of the double-decker bus, which includes a driver area and a passenger area;

[0032] The battery cooling assembly 2 includes a battery compressor 21, the battery compressor 21 is connected to a second heat exchange assembly 22, a third heat exchange assembly 24 and a battery pack 25, and the second heat exchange assembly 22 is connected to the third heat exchange assembly 24 via a plate heat exchanger 23;

[0033] Wherein, the indoor cooling assembly 1 and the battery cooling assembly 2 are integrated in the same housing 3;

[0034] When the temperature of the battery pack 25 is less than or equal to the set temperature, the third heat exchange component 24 cools the battery pack 25 ; when the temperature of the battery pack 25 exceeds the set temperature, the second heat exchange component 22 cools the cooling medium of the third heat exchange component 24 .

[0035] The battery cooling component 2 independently provides cooling for the battery pack 25, and constantly monitors and controls the temperature of the battery pack 25. The second heat exchange component 22 and the third heat exchange component 24 inside cool the battery pack 25, thereby improving the cooling efficiency of the battery pack 25. In addition, the compressor does not need to be started and stopped frequently when the bus is charging, thereby improving the service life of the compressor. On the other hand, the indoor cooling component 1 is integrated with the battery cooling component 2, thereby reducing the space occupied by the air-conditioning system and improving the interior space of the bus.

[0036] The first heat exchange component 12 includes a first condenser 121, a dryer 122, a first expansion valve 123, a second expansion valve 125, a first evaporator 124 and a second evaporator 126. One end of the first condenser 121 is connected to the indoor compressor 11, and the other end is connected to the dryer 122. The first expansion valve 123, the second expansion valve 125 and the dryer 122 are connected in parallel. One end of the first evaporator 124 is connected to the first expansion valve 123, and the other end is connected to the indoor compressor 11. One end of the second evaporator 126 is connected to the second expansion valve 125, and the other end is connected to the indoor compressor 11.

[0037] A pressure relief valve 101, a high-pressure sensor 102 and an oil-liquid separator 103 are also connected to the outlet of the indoor compressor 11. A condensing temperature sensor 1211 is provided on the first condenser 121. A low-pressure sensor 106, a gas-liquid separator 108 and an oil return capillary 107 are provided between the indoor compressor 11 and the first evaporator 124 and the second evaporator 126. The oil-liquid separator 103 is connected to the oil return capillary 107, and the inlet and outlet of the indoor compressor 11 are both connected to the valve core 104.

[0038] In addition, a sight glass 109 is provided between the dryer 122 and the first expansion valve 123, a main return air temperature sensor 105 is connected to one side of the low pressure sensor 106, and a secondary return air temperature sensor 1261 is connected to the outlet of the second evaporator 126. When the indoor compressor 11 is working, its refrigerant passes through the four-way valve 127, the first condenser 121, and the dryer 122, and then a part of it passes through the first expansion valve 123 to enter the first evaporator 124, and the other part passes through the second expansion valve 125 to enter the second evaporator 126, and finally gathers at the main return air temperature sensor 105, passes through the low pressure sensor 106, the oil return capillary 107, and the gas-liquid separator 108 to flow into the indoor compressor 11.

[0039] The second heat exchange component 22 includes a second condenser 221 and a thermal expansion valve 222. One end of the second condenser 221 is connected to the battery compressor 21, and the other end is connected to the thermal expansion valve 222. The thermal expansion valve 222 is connected to the plate heat exchanger 23, and the plate heat exchanger 23 is connected to the battery compressor 21.

[0040] The third heat exchange component 24 includes a water pump 242 and a water tank 241. The water pump 242, the battery pack 25 and the plate heat exchanger 23 are connected in series. The water outlet of the plate heat exchanger 23 is provided with a water outlet temperature sensor 232, and the water inlet is provided with a water inlet temperature sensor 231; wherein the water tank 241 is connected in parallel with the battery pack 25.

[0041] In addition, the outlet of the battery compressor 21 is connected to a high-pressure sensor 102 and a pressure relief valve 101 , and the inlet is connected to a low-pressure sensor 106 .

[0042] When the temperature of the battery pack 25 is less than or equal to the set temperature, the refrigerant in the water tank 241 cools the battery pack 25 through the water pump 242 and then flows back into the water tank 241; when the temperature of the battery pack 25 exceeds the set temperature, the second heat exchange component 22 works to cool the cooling medium of the third heat exchange component 24.

[0043] The indoor cooling component 1 and the battery cooling component 2 are integrated in a shell 3, on which an evaporator air outlet 31, a condenser air outlet 32, and a return air outlet 33 are provided. The evaporator air outlet 31 and the return air outlet 33 are both connected to the interior of the double-decker bus, and the condenser air outlet 32 ​​is connected to the atmosphere. In order to improve the cooling effect, a fan is provided on one side of the condenser air outlet 32 ​​and the evaporator air outlet 31.

[0044] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. An integrated electric air conditioning system for a double-decker bus, characterized in that: include: An indoor cooling component (1), the indoor cooling component (1) comprising an indoor compressor (11), the indoor compressor (11) being connected to a first heat exchange component (12), the first heat exchange component (12) cooling the interior of a double-decker bus, the interior comprising a driver area and a passenger area; A battery cooling assembly (2), the battery cooling assembly (2) comprising a battery compressor (21), the battery compressor (21) being connected to a second heat exchange assembly (22), a third heat exchange assembly (24) and a battery pack (25), the second heat exchange assembly (22) being connected to the third heat exchange assembly (24) via a plate heat exchanger (23); Wherein, the indoor cooling assembly (1) and the battery cooling assembly (2) are integrated in the same housing (3); When the temperature of the battery pack (25) is less than or equal to a set temperature, the third heat exchange component (24) cools the battery pack (25); when the temperature of the battery pack (25) exceeds the set temperature, the second heat exchange component (22) cools the cooling medium of the third heat exchange component (24).

2. The integrated electric air conditioning system for double-decker buses according to claim 1, characterized in that: The first heat exchange component (12) comprises a first condenser (121), a dryer (122), a first expansion valve (123), a second expansion valve (125), a first evaporator (124) and a second evaporator (126); one end of the first condenser (121) is connected to the indoor compressor (11), and the other end is connected to the dryer (122); the first expansion valve (123), the second expansion valve (125) and the dryer (122) are connected in parallel; one end of the first evaporator (124) is connected to the first expansion valve (123), and the other end is connected to the indoor compressor (11); one end of the second evaporator (126) is connected to the second expansion valve (125), and the other end is connected to the indoor compressor (11).

3. The integrated electric air conditioning system for a double-decker bus according to claim 2, characterized in that: A high-pressure sensor (102) and an oil-liquid separator (103) are provided between the indoor compressor (11) and the first condenser (121); a condensing temperature sensor (1211) is provided on the first condenser (121); a low-pressure sensor (106), a gas-liquid separator (108) and an oil return capillary (107) are provided between the indoor compressor (11) and the first evaporator (124) and the second evaporator (126); and the oil-liquid separator (103) is connected to the oil return capillary (107).

4. The integrated electric air conditioning system for a double-decker bus according to claim 3, characterized in that: The second heat exchange component (22) comprises a second condenser (221) and a thermal expansion valve (222); one end of the second condenser (221) is connected to the battery compressor (21), and the other end is connected to the thermal expansion valve (222); the thermal expansion valve (222) is connected to the plate heat exchanger (23), and the plate heat exchanger (23) is connected to the battery compressor (21).

5. The integrated electric air conditioning system for a double-decker bus according to claim 4, characterized in that: The third heat exchange component (24) comprises a water pump (242) and a water tank (241); the water pump (242), the battery pack and the plate heat exchanger (23) are connected in series; the water outlet of the plate heat exchanger (23) is provided with a water outlet temperature sensor (231), and the water inlet is provided with a water inlet temperature sensor (231); wherein, The water tank (241) is connected in parallel with the battery pack (25).

6. The integrated electric air conditioning system for a double-decker bus according to claim 5, characterized in that: The shell (3) is provided with an evaporator air outlet (31), a condenser air outlet (32), and a return air outlet (33); the evaporator air outlet (31) and the return air outlet (33) are both connected to the interior of the double-decker bus, and the condenser air outlet (32) is connected to the atmosphere.

7. The integrated electric air conditioning system for a double-decker bus according to claim 6, characterized in that: A fan is provided on one side of the condenser air outlet (32) and the evaporator air outlet (31).

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