CN109780753A - A kind of refrigerated air-conditioning system of LNG car - Google Patents
A kind of refrigerated air-conditioning system of LNG car Download PDFInfo
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- CN109780753A CN109780753A CN201910208186.2A CN201910208186A CN109780753A CN 109780753 A CN109780753 A CN 109780753A CN 201910208186 A CN201910208186 A CN 201910208186A CN 109780753 A CN109780753 A CN 109780753A
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Abstract
The invention discloses a kind of refrigerated air-conditioning systems of LNG car, including compressor, condenser, heat exchanger, temperature sensor, pressure sensor, expansion valve, evaporator and control system；The heat exchanger is connect with condenser, liquefied natural gas line, and the temperature sensor, pressure sensor and heat exchanger connect, and the control system is connect with compressor, temperature sensor, pressure sensor, expansion valve, and the expansion valve is connect with evaporator.The advantages of present invention incorporates compressed vapour refrigeration modes and in the way of natural gas vaporization absorption refrigeration, there is refrigerating capacity small, energy saving advantage is influenced by engine load.Disadvantage that the system can overcome compressed vapour refrigeration modes energy consumption big and the shortcomings that refrigerating capacity is influenced by engine load when natural gas vaporization being overcome to freeze.
Description
Technical field
The present invention relates to refrigerated air-conditioning system, in particular to a kind of refrigerated air-conditioning system of liquefied natural gas (LNG) automobile,
Belong to technical field of air conditioner refrigeration.
Background technique
The refrigerated air-conditioning system used on automobile at present is usually compressed vapour formula refrigeration system, when air-conditioning system is freezed,
Refrigerant vapor is compressed in compressor of air conditioner, and pressure and temperature increases and become the moral steam of high temperature and pressure.High temperature and pressure
Refrigerant vapor be cooled in condenser, temperature reduces to become the refrigerant of liquid, and the expanded valve of the refrigerant of liquid enters
Evaporator evaporation becomes steam, absorbs heat to freeze.In process of refrigerastion, compressor of air conditioner will be ceaselessly to refrigerant vapor
It is compressed, so that the energy of consumption of engine, increases the oil consumption of automobile.
The method of liquefied natural gas gasifying heat absorption can be used to freeze in liquefied natural gas vehicle, that is, works as engine operation
When, liquefied natural gas will first pass through gasifier and absorb heat to become gaseous natural gas for engine combustion, utilize liquefaction
Heat is absorbed when natural gas gasifying to freeze.No need to consume the energy of engine for this refrigeration modes, but also have apparent
The shortcomings that, refrigerating capacity is related with the load of engine, and when engine low load operation, the liquefied natural gas of consumption is few, at this moment
The refrigerating capacity of air-conditioning is small, is not able to satisfy the requirement of refrigeration.
Summary of the invention
The purpose of the present invention is be directed to the deficiency of existing air-conditioning system, propose a kind of combination compressed vapour refrigeration and utilize liquid
Change the automotive air-conditioning system of natural gas evaporation endothermic refrigeration, which can overcome compressed vapour refrigeration modes energy consumption big
Disadvantage, and the shortcomings that refrigerating capacity is influenced by engine load when natural gas vaporization can be overcome to freeze.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of refrigerated air-conditioning system of LNG car, including compressor, condenser, heat exchanger, temperature sensor,
Pressure sensor, expansion valve, evaporator and control system；The heat exchanger is connect with condenser, liquefied natural gas line, described
Temperature sensor, pressure sensor and heat exchanger connect, the control system and compressor, temperature sensor, pressure sensor,
Expansion valve connection, the expansion valve are connect with evaporator.
Further, the temperature sensor, pressure sensor, expansion valve are all connected between heat exchanger and evaporator
Pipeline on, and temperature sensor, pressure sensor, expansion valve are connected with control system.
Further, when air conditioner refrigerating, temperature sensor and pressure sensor measure the temperature and pressure of refrigerant, control
System processed according to the refrigerant pressure P that the refrigerant temperature T and pressure sensor of temperature sensor measurement are measured judge refrigerant whether liquid
Change.
Further, if the refrigerant pressure P at refrigerant temperature T is higher than liquefaction pressure, control system is turned down adjustable
The outlet pressure of the compressor of pressure at expulsion makes cooling medium liquid conversely, the outlet pressure of the compressor of adjustable pressure at expulsion is turned up
Change.
Further, liquefied refrigerant enters evaporator evaporation endothermic by expansion valve to freeze, and control is
The aperture of system variable expansion valve is to control refrigerating capacity.
The invention has the following beneficial effects:
The advantages of present invention incorporates compressed vapour refrigeration modes and in the way of natural gas vaporization absorption refrigeration, tool
There is refrigerating capacity to be influenced small, energy saving advantage by engine load.The system can overcome compressed vapour refrigeration modes energy consumption
Big disadvantage, and the shortcomings that refrigerating capacity is influenced by engine load when natural gas vaporization can be overcome to freeze.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Marked in the figure: 1- compressor；2- condenser；3- heat exchanger；4- temperature sensor；5- pressure sensor；6- expansion
Valve；7- evaporator；8- control system.
Specific embodiment
1 couple of present invention does further explanation with reference to the accompanying drawing.
The present invention provides a kind of refrigerated air-conditioning system for being used for liquefied natural gas (LNG) automobile, as shown in Figure 1, the system
Compressor 1, condenser 2, heat exchanger 3, temperature sensor 4, pressure sensor 5, expansion valve 6, steaming including adjustable pressure at expulsion
Send out device 7 and control system 8.Heat exchanger 3 is connect with condenser 2, and heat exchanger 3 is connect with liquefied natural gas line, temperature sensor
4, pressure sensor 5 is connect with heat exchanger 3, control system 8 and compressor 1, temperature sensor 4, pressure sensor 5, expansion valve 6
Connection.When the vehicle is running, liquefied natural gas evaporates gasification in heat exchanger 3, reduces the temperature of the refrigerant come out in condenser 2
Degree to reduce the liquefaction pressure of refrigerant, therefore reduces the outlet pressure of compressor, and then the power for reducing compressor of air conditioner disappears
Consumption, reaches the function of vehicle oil saving.
When air conditioner refrigerating, refrigerant vapor is compressed in the compressor 1 of adjustable pressure at expulsion, pressure and temperature increase and
Become the steam of high temperature and pressure.The refrigerant vapor of high temperature and pressure is cooled in condenser 2, then enters back into heat exchanger 3, liquefies
Natural gas absorbs the heat gasification of refrigerant in heat exchanger 3, and the temperature of refrigerant further decreases.At this moment temperature sensor 4 and pressure
Force snesor 5 measures the temperature and pressure of refrigerant, and control system 8 judges refrigerant at this time by the temperature and pressure of refrigerant at this time
Whether liquefy.If the pressure of refrigerant is higher than liquefaction pressure at this temperature, control system 8 will turn down the pressure of adjustable pressure at expulsion
The outlet pressure of contracting machine 1, the outlet pressure of compressor 1 on the contrary then that adjustable pressure at expulsion is turned up, makes cooling medium liquefaction.
Liquefied refrigerant enters 7 evaporation endothermic of evaporator by expansion valve 6 to freeze, and control system 8 adjusts swollen
The aperture of swollen valve 6 is to control refrigerating capacity.The compressor 1 that refrigerant vapor after evaporation enters adjustable pressure at expulsion is pressed again
Contracting.
The present invention with conventional compressed vapour refrigeration modes compared to having the advantages that energy conservation, principle be it is such, it is common
Refrigerant, such as R134a condensing temperature to pressure be it is relevant, when temperature is 40 DEG C, pressure of the R134a at 1016 kPas
It is lower to liquefy, and when temperature is 0 DEG C, it is only necessary to 293 kPas of pressure can make it liquefy.When environment temperature is 35 DEG C,
When refrigerant can be cooled to 40 DEG C by condenser, the outlet pressure of the compressor of air conditioner of Ordinary Compression steam refrigerating at least wants 1,016,000
Pa, and in the present invention, refrigerant is not only cooled to 40 DEG C by condenser, will also continue the natural air cooling that is liquefied in heat exchanger
But, if being cooled to 0 DEG C, then the outlet pressure of compressor of air conditioner need to only be greater than 300 kPas.Even if cannot be by refrigerant
It is cooled to 0 DEG C, due to the cooling of liquefied natural gas, refrigerant temperature of the invention can also be lower than the refrigerant temperature of common air-conditioning, cold
The pressure that matchmaker needs when liquefying can also be lower than the pressure of common air-conditioning, and the outlet pressure of compressor is lower than the outlet pressure of common air-conditioning
Power, so that the power consumption of compressor is reduced, it is energy saving.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention.It is all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (5)
1. a kind of refrigerated air-conditioning system of LNG car, it is characterised in that: including compressor (1), condenser (2), change
Hot device (3), temperature sensor (4), pressure sensor (5), expansion valve (6), evaporator (7) and control system (8)；The heat exchange
Device (3) is connect with condenser (2), liquefied natural gas line, the temperature sensor (4), pressure sensor (5) and heat exchanger
(3) it connecting, the control system (8) connect with compressor (1), temperature sensor (4), pressure sensor (5), expansion valve (6),
The expansion valve (6) connect with evaporator (7).
2. a kind of refrigerated air-conditioning system of LNG car according to claim 1, it is characterised in that: the temperature
Sensor (4), pressure sensor (5), expansion valve (6) are all connected on the pipeline between heat exchanger (3) and evaporator (7), and
Temperature sensor (4), pressure sensor (5), expansion valve (6) are connected with control system (8).
3. a kind of refrigerated air-conditioning system of LNG car according to claim 1, it is characterised in that: when air-conditioning system
When cold, the temperature and pressure of temperature sensor (4) and pressure sensor (5) measurement refrigerant, control system (8) is according to temperature sensing
The refrigerant temperature T of device (4) measurement and the refrigerant pressure P of pressure sensor (5) measurement judge whether refrigerant liquefies.
4. a kind of refrigerated air-conditioning system of LNG car according to claim 3, it is characterised in that: if cold
Refrigerant pressure P under matchmaker's temperature T is higher than liquefaction pressure, and control system (8) turns down the outlet of the compressor (1) of adjustable pressure at expulsion
Pressure makes cooling medium liquefaction conversely, the outlet pressure of the compressor (1) of adjustable pressure at expulsion is turned up.
5. a kind of refrigerated air-conditioning system of LNG car according to claim 1, it is characterised in that: liquefied cold
Matchmaker enters evaporator (7) evaporation endothermic by expansion valve (6) to freeze, and control system (8) variable expansion valve (6) are opened
Degree is to control refrigerating capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910208186.2A CN109780753A (en) | 2019-03-19 | 2019-03-19 | A kind of refrigerated air-conditioning system of LNG car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910208186.2A CN109780753A (en) | 2019-03-19 | 2019-03-19 | A kind of refrigerated air-conditioning system of LNG car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109780753A true CN109780753A (en) | 2019-05-21 |
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ID=66488417
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910208186.2A Pending CN109780753A (en) | 2019-03-19 | 2019-03-19 | A kind of refrigerated air-conditioning system of LNG car |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423997A (en) * | 2011-09-16 | 2012-04-25 | 上海交通大学 | Automobile air conditioning system realizing supercooling through latent heat of vaporization of liquefied natural gas (LNG) vaporization |
| WO2014103520A1 (en) * | 2012-12-28 | 2014-07-03 | ダイキン工業株式会社 | Refrigeration device |
| US20160131405A1 (en) * | 2014-11-07 | 2016-05-12 | Emerson Climate Technologies, Inc. | Head pressure control |
| CN107014016A (en) * | 2017-04-20 | 2017-08-04 | 广东申菱环境系统股份有限公司 | A kind of fluorine pump natural cooling evaporating type condensing cooling-water machine and its control method |
| CN107178941A (en) * | 2017-07-06 | 2017-09-19 | 王道均 | Three source refrigeration control systems of intelligence |
| WO2018193518A1 (en) * | 2017-04-18 | 2018-10-25 | 三菱電機株式会社 | Air conditioner |
-
2019
- 2019-03-19 CN CN201910208186.2A patent/CN109780753A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423997A (en) * | 2011-09-16 | 2012-04-25 | 上海交通大学 | Automobile air conditioning system realizing supercooling through latent heat of vaporization of liquefied natural gas (LNG) vaporization |
| WO2014103520A1 (en) * | 2012-12-28 | 2014-07-03 | ダイキン工業株式会社 | Refrigeration device |
| US20160131405A1 (en) * | 2014-11-07 | 2016-05-12 | Emerson Climate Technologies, Inc. | Head pressure control |
| WO2018193518A1 (en) * | 2017-04-18 | 2018-10-25 | 三菱電機株式会社 | Air conditioner |
| CN107014016A (en) * | 2017-04-20 | 2017-08-04 | 广东申菱环境系统股份有限公司 | A kind of fluorine pump natural cooling evaporating type condensing cooling-water machine and its control method |
| CN107178941A (en) * | 2017-07-06 | 2017-09-19 | 王道均 | Three source refrigeration control systems of intelligence |
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Application publication date: 20190521 |