CN111422033A - Modular passenger car secondary heat exchange air conditioning system and working method thereof - Google Patents
Modular passenger car secondary heat exchange air conditioning system and working method thereof Download PDFInfo
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- CN111422033A CN111422033A CN202010423696.4A CN202010423696A CN111422033A CN 111422033 A CN111422033 A CN 111422033A CN 202010423696 A CN202010423696 A CN 202010423696A CN 111422033 A CN111422033 A CN 111422033A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000003507 refrigerant Substances 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000003570 air Substances 0.000 claims description 43
- 238000005057 refrigeration Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 6
- 239000012080 ambient air Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00371—Air-conditioning arrangements specially adapted for particular vehicles for vehicles carrying large numbers of passengers, e.g. buses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00514—Details of air conditioning housings
- B60H1/00542—Modular assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00978—Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The technical scheme of the invention discloses a modular passenger car secondary heat exchange air conditioning system and a working method thereof, wherein the modular passenger car secondary heat exchange air conditioning system comprises an air conditioning unit module; an in-vehicle air conditioning module; a pressure sensor and a gas concentration sensor arranged in the air conditioning unit module; a control system for controlling the air conditioning unit module, the in-vehicle air conditioning module, the pressure sensor and the gas concentration sensor; the control system controls the refrigerant to circulate in the air conditioning unit module and the air conditioning module in the vehicle so as to realize the heating or cooling function. According to the invention, the air conditioning system is set to be a modular system, and the air conditioning unit module, the roof heat exchanger and the first fan form a first configuration; the air conditioning unit module, the floor heat exchanger and the second fan form a second configuration; the air conditioning unit module, the roof heat exchanger, the first fan, the floor heat exchanger and the second fan form a third configuration, the air conditioning unit module can be replaced by other heat source or cold source modules, and the outdoor heat exchange module can be configured or not, so that the configuration of the whole system is flexible.
Description
Technical Field
The invention relates to the technical field of passenger cars, in particular to a modular passenger car secondary heat exchange air conditioning system and a working method thereof.
Background
The traditional fuel oil vehicle adopts a compression refrigeration technology to provide a cold air conditioner for the passenger cabin, and utilizes the waste heat of an engine to provide the hot air conditioner for the passenger cabin in winter. Along with the improvement of fuel economy, the engine waste heat is less and less, can't fully satisfy the demand of heating in winter. The pure electric vehicle has no waste heat of an engine, and a new heat source is needed for heating in winter.
At present, the common solutions are to use PTC (positive temperature coefficient resistance) electrical heating or to use heat pump air conditioning systems. At present, most automobile air conditioners adopt R134a refrigerant, and a heat pump system adopting the refrigerant has low efficiency when the ambient temperature is lower than-10 ℃, so that the heating requirement cannot be met. In a passenger car air conditioner, heating in a low-temperature environment can be achieved by using R407C or R410a refrigerant. However, neither R134a, R407c, nor R410a is an environmentally friendly refrigerant.
Meanwhile, when the automobile system runs for a long time, the refrigerant can be leaked due to aging of the pipeline or excessive pressure in the pipeline, so that the performance of the automobile air conditioning system is reduced.
Disclosure of Invention
In order to solve the technical problem, the technical scheme of the invention provides a modular passenger car secondary heat exchange air conditioning system, which comprises:
an air conditioning unit module;
the air conditioning module in the vehicle is connected with the air conditioning unit module;
the pressure sensor is arranged in the air conditioning unit module and used for detecting system pressure;
a gas concentration sensor provided in the air conditioning unit module and detecting a concentration of refrigerant gas;
a control system for controlling the air conditioning unit module, the in-vehicle air conditioning module, the pressure sensor, and the gas concentration sensor;
the control system controls the refrigerant to circulate in the air conditioning unit module and the in-vehicle air conditioning module to realize the heating or cooling function.
Optionally, the air conditioning unit module comprises:
a compressor and a four-way valve;
the outlet and the inlet of the compressor are respectively connected to the first interface and the third interface of the four-way valve;
the first air conditioner heat exchanger is connected to a second interface of the four-way valve;
a throttle valve connected with the first air conditioner heat exchanger and
and the second air conditioner heat exchanger is communicated with the throttling valve and is connected to a fourth interface of the four-way valve.
Optionally, the in-vehicle air conditioning module includes:
the heat exchanger on the roof and a first fan matched with the heat exchanger;
the floor heat exchanger and a second fan matched with the floor heat exchanger;
the roof heat exchanger and the floor heat exchanger are respectively connected to two ends of the second air conditioner heat exchanger through pipelines;
and a pair of first working medium pump and a pair of second working medium pump which are opposite in direction are arranged between the roof heat exchanger and the floor heat exchanger in parallel.
Optionally, the air conditioning unit module forms a first configuration with the roof heat exchanger and the first fan;
the air conditioning unit module, the floor heat exchanger and the second fan form a second configuration;
the air conditioning unit module forms a third configuration with the roof heat exchanger, the first fan, the floor heat exchanger, and the second fan.
Optionally, the first air conditioner heat exchanger is provided with a third fan.
Optionally, the outdoor heat exchange module is connected with the air conditioning unit module, so that the refrigerant flowing into the outdoor heat exchange module through the air conditioning unit module is subjected to heat exchange with ambient air and is returned to the air conditioning unit module.
Optionally, the outdoor heat exchange module includes:
the inlet and the outlet of the outdoor heat exchanger are connected to two ends of the first indoor heat exchanger through pipelines;
and a third working medium pump is arranged between the outdoor heat exchanger and the first air-conditioning heat exchanger.
Optionally, the refrigerant is R744 or R290.
In order to solve the technical problem, the technical scheme of the invention also provides a working method of the modular passenger car secondary heat exchange air conditioning system, wherein the working method comprises the following steps:
when the air conditioning system is used for refrigerating, the control system controls the flow direction of a refrigerant in the air conditioning unit module to be a compressor outlet, a first interface of a four-way valve, a third interface of the four-way valve, a first air conditioning heat exchanger, a throttle valve, a second air conditioning heat exchanger, a fourth interface of the four-way valve, a second interface of the four-way valve and a compressor inlet; the control system controls the flow direction of the refrigerant in the in-vehicle air conditioning module to be a second air conditioning heat exchanger, a roof heat exchanger, a first working medium pump, a floor heat exchanger and a second air conditioning heat exchanger; the control system controls the flow direction of the refrigerant in the outdoor heat exchange module to be the first air conditioner heat exchanger, the third working medium pump, the outdoor heat exchanger and the first air conditioner heat exchanger, so that the refrigeration effect is realized.
When the air conditioning system heats, the control system controls the flow direction of a refrigerant in the air conditioning unit module to be a compressor outlet, a first interface of a four-way valve, a fourth interface of the four-way valve, a second air conditioning heat exchanger, a throttle valve, a first air conditioning heat exchanger, a third interface of the four-way valve, a second interface of the four-way valve and a compressor inlet; the control system controls the flow direction of the refrigerant in the in-vehicle air conditioning module to be a second air conditioning heat exchanger, a floor heat exchanger, a second working medium pump, a roof heat exchanger and a second air conditioning heat exchanger; the control system controls the flow direction of the refrigerant in the outdoor heat exchange module to be the first air conditioner heat exchanger, the third working medium pump, the outdoor heat exchanger and the first air conditioner heat exchanger, so that the heating effect is realized.
The technical scheme of the invention has the beneficial effects that:
according to the invention, the air conditioning system is set to be a modular system, and the air conditioning unit module, the roof heat exchanger and the first fan form a first configuration; the air conditioning unit module, the floor heat exchanger and the second fan form a second configuration; the air conditioning unit module, the roof heat exchanger, the first fan, the floor heat exchanger and the second fan form a third configuration, the air conditioning unit module can be replaced by other heat source or cold source modules, and the outdoor heat exchange module can be configured or not, so that the configuration of the whole system is flexible.
The air conditioning system is set in a mode of main refrigeration of the roof heat exchanger and main heating of the floor heat exchanger, meets the requirements that cold air flows from top to bottom and hot air flows from bottom to top in a passenger compartment, and meanwhile, the roof air conditioning module and the floor air conditioning module work simultaneously, so that air circulation in the vehicle can be accelerated, a temperature field in the vehicle can be constructed, and the comfort of passengers can be improved by adjusting the air volume (air speed) of the heat exchange module.
The air conditioning system provided by the invention is provided with the pressure sensor and the gas concentration sensor, so that the pressure and the gas concentration of the air conditioning system are monitored in real time, and once the pressure and the gas concentration exceed a set value, the system takes protective measures, and the overall safety and stability of the air conditioning system are ensured.
Drawings
FIG. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an air conditioning system with an outdoor heat exchange module removed according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a refrigeration cycle of an air conditioning system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a heating cycle route of an air conditioning system according to an embodiment of the present invention.
The specific implementation mode is as follows:
the invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
Referring to fig. 1 and 2, a modular passenger car secondary heat exchange air conditioning system according to an embodiment is shown, wherein the modular passenger car secondary heat exchange air conditioning system comprises an air conditioning unit module 100; an in-vehicle air conditioning module 200 connected to the air conditioning unit module 100; a pressure sensor 15 provided in the air conditioning unit module 100 for detecting a system pressure; a gas concentration sensor 16 provided in the air conditioning unit module 100 for detecting the concentration of refrigerant gas; a control system for controlling the air conditioning unit module 100, the in-vehicle air conditioning module 200, the pressure sensor 15, and the gas concentration sensor 16; the control system controls the refrigerant to circulate through the air conditioning unit module 100 and the in-vehicle air conditioning module 200 to realize a heating or cooling function.
Alternatively, the air conditioning unit module 100 includes a compressor 1 and a four-way valve 2; the outlet and the inlet of the compressor 1 are respectively connected to a first interface A and a third interface B of the four-way valve 2; a first air conditioner heat exchanger 3 connected to a second port C of the four-way valve 2; the throttle valve 5 is connected with the first air-conditioning heat exchanger 3, the second air-conditioning heat exchanger 4 is communicated with the throttle valve 5, and the second air-conditioning heat exchanger 4 is connected to a fourth interface D of the four-way valve 2.
Optionally, the in-vehicle air conditioning module 200 includes a roof heat exchanger 6 and a first fan 8 matched with the roof heat exchanger; the floor heat exchanger 7 and a second fan 9 matched with the floor heat exchanger; the roof heat exchanger 6 and the floor heat exchanger 7 are respectively connected to two ends of the second air-conditioning heat exchanger 4 through pipelines 400; a pair of first working medium pump 10 and a pair of second working medium pump 11 which are opposite in direction are arranged in parallel between the roof heat exchanger 6 and the floor heat exchanger 7.
Optionally, the air conditioning unit module 100 forms a first configuration with the roof heat exchanger 6, the first fan 8; the air conditioning unit module 100 forms a second configuration with the floor heat exchanger 7 and the second fan 9; the air conditioning unit module 200 forms a third configuration with the roof heat exchanger 6, the first fan 8, the floor heat exchanger 7, and the second fan 9.
Optionally, the first air conditioner heat exchanger 3 is provided with a third fan 14.
Optionally, an outdoor heat exchange module 300 connected to the air conditioning unit module 100 is further included to exchange heat between the refrigerant flowing into the outdoor heat exchange module 300 through the air conditioning unit module 100 and the ambient air and to return the refrigerant to the air conditioning unit module 100.
Optionally, the outdoor heat exchange module 300 includes an outdoor heat exchanger 12 and a fourth fan 13 matched therewith, and an inlet and an outlet of the outdoor heat exchanger 12 are connected to two ends of the first indoor heat exchanger 3 through a pipeline 400; a third working medium pump 17 is arranged between the outdoor heat exchanger 12 and the first air-conditioning heat exchanger 3.
Optionally, the refrigerant is R744 or R290.
The features and functions of the present invention will be further understood from the following description.
When the air conditioning system of the embodiment is used for refrigerating, the control system controls the flow direction of a refrigerant (the refrigerant is R744 (carbon dioxide) or R290 (propane)) in the air conditioning unit module 100 to be a compressor outlet, a four-way valve first interface, a four-way valve third interface, a first air conditioning heat exchanger, a throttle valve, a second air conditioning heat exchanger, a four-way valve fourth interface, a four-way valve second interface and a compressor inlet; the control system controls the flow direction of the refrigerant in the in-vehicle air conditioning module to be a second air conditioning heat exchanger, a roof heat exchanger, a first working medium pump, a floor heat exchanger and a second air conditioning heat exchanger; the control system controls the flow direction of the refrigerant in the outdoor heat exchange module to be the first air conditioner heat exchanger, the third working medium pump, the outdoor heat exchanger and the first air conditioner heat exchanger, so that the refrigeration effect is realized.
When the air conditioning system of the embodiment heats, the control system controls the flow direction of the refrigerant in the air conditioning unit module 100 to be the outlet of the compressor, the first interface of the four-way valve, the fourth interface of the four-way valve, the second air conditioning heat exchanger, the throttle valve, the first air conditioning heat exchanger, the third interface of the four-way valve, the second interface of the four-way valve and the inlet of the compressor; the control system controls the flow direction of the refrigerant in the in-vehicle air conditioning module to be a second air conditioning heat exchanger, a floor heat exchanger, a second working medium pump, a roof heat exchanger and a second air conditioning heat exchanger; the control system controls the flow direction of the refrigerant in the outdoor heat exchange module to be the first air conditioner heat exchanger, the third working medium pump, the outdoor heat exchanger and the first air conditioner heat exchanger, so that the heating effect is realized.
Specifically, the second air conditioner heat exchanger realizes heat exchange between the air conditioning system refrigerant and the air conditioning module refrigerant in the vehicle. The first air conditioner heat exchanger realizes the heat exchange between the refrigerant of the air conditioning system and the refrigerant of the outdoor heat exchange module. The four-way valve is used for reversing the refrigerant in the air conditioning unit module, and can also be replaced by four stop valves or two three-way valves. The throttle valve can be an electronic expansion valve or a throttle pipe. The air conditioner controller includes air conditioner system control, compressor drive control, voltage conversion, etc.
A heat regenerator can be connected in series in a refrigerant loop in the air conditioning unit module to exchange heat between the refrigerant at the inlet of the compressor and the refrigerant at the inlet of the second air conditioning heat exchanger, so that the refrigeration efficiency is improved.
A pressure sensor is arranged in a refrigerant loop in the air conditioning unit module to monitor the operating pressure of the system, and if the system pressure exceeds a set value, the system automatically alarms and starts a pressure relief program. A gas concentration sensor is arranged in the air conditioning unit module, the concentration of R744 or R290 gas is detected, if the system leaks to cause the gas concentration to exceed a set value, the system automatically alarms and starts a fan to exhaust air quickly, and the gas concentration is reduced. And as shown in fig. 1 (the pressure sensor and the gas concentration sensor in fig. 2, 3 and 4 are located at the same positions as those in fig. 1, but are not shown), the pressure sensor is disposed in the refrigerant circuit for detecting the pressure value of the refrigerant in the circuit, the gas concentration sensor is disposed in the air-conditioning unit module for detecting the concentration value of the gas possibly leaked into the air-conditioning unit module, and the working medium in the refrigerant circuit in the air-conditioning unit module is R744 or R290.
Working media in a loop of the air conditioning module in the vehicle are antifreeze or other media. Other heat sources or cold sources, such as compression refrigeration/heating systems, thermoelectric systems, electric heating systems or other refrigeration/heating systems, can be connected in series in the circuit of the air conditioning module in the vehicle.
The air conditioning module in the car can be composed of the roof heat exchanger 6 and the floor heat exchanger 7 together, or can be composed of the roof heat exchanger 6 or the floor heat exchanger 7 separately. The roof heat exchanger 6 and the floor heat exchanger 7 can form a loop of the air conditioning module in the vehicle independently, and can also form a loop of the air conditioning module in the vehicle in series or in parallel. Other devices requiring cooling or heating, such as battery systems, motor systems, high-power components or other devices requiring cooling/heating, may also be incorporated into the circuit of the in-vehicle air conditioning module.
The outdoor heat exchange module realizes heat exchange through the outdoor heat exchanger 5, the third fan 3 and ambient air. The air conditioning system of the embodiment may also be configured with the first air conditioning heat exchanger and the third fan directly in the air conditioning unit module without configuring the outdoor heat exchange module, and heat exchange is realized through the first air conditioning heat exchanger, the third fan and the ambient air. Working media in a loop formed by the outdoor heat exchange module are antifreeze or other media. A liquid storage tank or a working medium kettle can be connected in series in the loop of the air conditioning module in the vehicle and the loop of the outdoor heat exchange module and is used for storing working media in the loops.
In summary, the air conditioning system is set as a modular system, and the air conditioning unit module, the roof heat exchanger and the first fan form a first configuration; the air conditioning unit module, the floor heat exchanger and the second fan form a second configuration; the air conditioning unit module, the roof heat exchanger, the first fan, the floor heat exchanger and the second fan form a third configuration, the air conditioning unit module can be replaced by other heat source or cold source modules, and the outdoor heat exchange module can be configured or not, so that the configuration of the whole system is flexible.
The air conditioning system is set in a mode of main refrigeration of the roof heat exchanger and main heating of the floor heat exchanger, meets the requirements that cold air flows from top to bottom and hot air flows from bottom to top in a passenger compartment, and meanwhile, the roof air conditioning module and the floor air conditioning module work simultaneously, so that air circulation in the vehicle can be accelerated, a temperature field in the vehicle can be constructed, and the comfort of passengers can be improved by adjusting the air volume (air speed) of the heat exchange module.
The air conditioning system provided by the invention is provided with the pressure sensor and the gas concentration sensor, so that the pressure and the gas concentration of the air conditioning system are monitored in real time, and once the pressure and the gas concentration exceed a set value, the system takes protective measures, and the overall safety and stability of the air conditioning system are ensured.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a modularization passenger train secondary heat transfer air conditioning system which characterized in that includes:
an air conditioning unit module;
the air conditioning module in the vehicle is connected with the air conditioning unit module;
the pressure sensor is arranged in the air conditioning unit module and used for detecting system pressure;
a gas concentration sensor provided in the air conditioning unit module and detecting a concentration of refrigerant gas;
a control system for controlling the air conditioning unit module, the in-vehicle air conditioning module, the pressure sensor, and the gas concentration sensor;
the control system controls the refrigerant to circulate in the air conditioning unit module and the in-vehicle air conditioning module to realize the heating or cooling function.
2. The modular passenger car secondary heat exchange air conditioning system of claim 1,
the air conditioning unit module includes:
a compressor and a four-way valve;
the outlet and the inlet of the compressor are respectively connected to the first interface and the third interface of the four-way valve;
the first air conditioner heat exchanger is connected to a second interface of the four-way valve;
a throttle valve connected with the first air conditioner heat exchanger and
and the second air conditioner heat exchanger is communicated with the throttling valve and is connected to a fourth interface of the four-way valve.
3. The modular passenger car secondary heat exchange air conditioning system of claim 2,
the in-vehicle air conditioning module includes:
the heat exchanger on the roof and a first fan matched with the heat exchanger;
the floor heat exchanger and a second fan matched with the floor heat exchanger;
the roof heat exchanger and the floor heat exchanger are respectively connected to two ends of the second air conditioner heat exchanger through pipelines;
and a pair of first working medium pump and a pair of second working medium pump which are opposite in direction are arranged between the roof heat exchanger and the floor heat exchanger in parallel.
4. The modular passenger car secondary heat exchange air conditioning system of claim 3,
the air conditioning unit module, the roof heat exchanger and the first fan form a first configuration;
the air conditioning unit module, the floor heat exchanger and the second fan form a second configuration;
the air conditioning unit module forms a third configuration with the roof heat exchanger, the first fan, the floor heat exchanger, and the second fan.
5. The modular passenger vehicle secondary heat exchange air conditioning system of claim 4, wherein the first air conditioner heat exchanger is configured with a third fan.
6. The modular passenger vehicle secondary heat exchange air conditioning system as recited in claim 5 further comprising an outdoor heat exchange module connected to the air conditioning unit module for exchanging heat between the refrigerant flowing into the outdoor heat exchange module through the air conditioning unit module and ambient air and returning the refrigerant to the air conditioning unit module.
7. The modular passenger car secondary heat exchange air conditioning system of claim 6,
the outdoor heat exchange module comprises:
the inlet and the outlet of the outdoor heat exchanger are connected to two ends of the first indoor heat exchanger through pipelines;
and a third working medium pump is arranged between the outdoor heat exchanger and the first air-conditioning heat exchanger.
8. The modular passenger car secondary heat exchange air conditioning system of claim 7, wherein the refrigerant is R744 or R290.
9. The working method of the modular passenger car secondary heat exchange air conditioning system is characterized by comprising the following steps of:
when the air conditioning system is used for refrigerating, the control system controls the flow direction of a refrigerant in the air conditioning unit module to be a compressor outlet, a first interface of a four-way valve, a third interface of the four-way valve, a first air conditioning heat exchanger, a throttle valve, a second air conditioning heat exchanger, a fourth interface of the four-way valve, a second interface of the four-way valve and a compressor inlet; the control system controls the flow direction of the refrigerant in the in-vehicle air conditioning module to be a second air conditioning heat exchanger, a roof heat exchanger, a first working medium pump, a floor heat exchanger and a second air conditioning heat exchanger; the control system controls the flow direction of the refrigerant in the outdoor heat exchange module to be the first air conditioner heat exchanger, the third working medium pump, the outdoor heat exchanger and the first air conditioner heat exchanger, so that the refrigeration effect is realized.
When the air conditioning system heats, the control system controls the flow direction of a refrigerant in the air conditioning unit module to be a compressor outlet, a first interface of a four-way valve, a fourth interface of the four-way valve, a second air conditioning heat exchanger, a throttle valve, a first air conditioning heat exchanger, a third interface of the four-way valve, a second interface of the four-way valve and a compressor inlet; the control system controls the flow direction of the refrigerant in the in-vehicle air conditioning module to be a second air conditioning heat exchanger, a floor heat exchanger, a second working medium pump, a roof heat exchanger and a second air conditioning heat exchanger; the control system controls the flow direction of the refrigerant in the outdoor heat exchange module to be the first air conditioner heat exchanger, the third working medium pump, the outdoor heat exchanger and the first air conditioner heat exchanger, so that the heating effect is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010423696.4A CN111422033A (en) | 2020-05-19 | 2020-05-19 | Modular passenger car secondary heat exchange air conditioning system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010423696.4A CN111422033A (en) | 2020-05-19 | 2020-05-19 | Modular passenger car secondary heat exchange air conditioning system and working method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113525437A (en) * | 2021-06-30 | 2021-10-22 | 广州鼎汉轨道交通车辆装备有限公司 | R744 refrigerant heat pump air conditioning unit, system and control method thereof |
| WO2024007609A1 (en) * | 2022-07-08 | 2024-01-11 | 重庆海尔空调器有限公司 | Safety early warning method and device for air conditioner, air conditioner, and storage medium |
| EP4467367A1 (en) * | 2023-05-25 | 2024-11-27 | Valeo Thermal Commercial Vehicles Germany GmbH | Rooftop air conditioning system for heating and/or cooling a vehicle interior |
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Application publication date: 20200717 |