CN101846413B - Unitary air-conditioning unit of subway vehicle and control method thereof - Google Patents
Unitary air-conditioning unit of subway vehicle and control method thereof Download PDFInfo
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- CN101846413B CN101846413B CN2010101833067A CN201010183306A CN101846413B CN 101846413 B CN101846413 B CN 101846413B CN 2010101833067 A CN2010101833067 A CN 2010101833067A CN 201010183306 A CN201010183306 A CN 201010183306A CN 101846413 B CN101846413 B CN 101846413B
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Abstract
The invention discloses a unitary air-conditioning unit of a subway vehicle and a control method thereof, which belong to the field of air-conditioning ventilation systems of subway vehicles. The unitary air-conditioning unit comprises at least two independent refrigeration loops, wherein each refrigeration loop comprises a compressor, a condenser communicated with one end of the compressor and an evaporator coiled pipe communicated with one end of the condenser; the evaporator coiled pipe is communicated with the other end of the compressor to form a closed loop; the evaporator coiled pipe is positioned in an evaporator; an air feeder is arranged on one side of the evaporator; and at least two parallel compressors are arranged in each independent refrigeration loop. The control method is realized by adjusting the starting and stopping number of the compressors in various independent refrigeration loops according to the detected refrigeration load capacity in the vehicle, so that the refrigeration loops for working are the most. The invention has the advantages of multistage adjustment of refrigerating capacity, full utilization of the heat exchange area of the condenser and the evaporator, high refrigeration efficiency, good energy-saving effect, high uniformity for air temperature in the vehicle, small temperature fluctuation and high comfort feeling for passengers.
Description
Technical field
The present invention relates to the air conditioner of subway vehicle ventilating system, be specially a kind of railcar unitary air conditioner unit and control method thereof.
Background technology
Two independently refrigerating circuits of the general employing of present domestic air conditioner of subway vehicle unit, as shown in Figure 1, each loop comprises that a power is about the compressor 1 of 6.5KW, the condenser 2 that is connected with compressor 1, the evaporator coil 6 that is connected with condenser 2; This evaporator coil 6 is connected with compressor 1.The evaporator coil 6 that comprises two groups of parallel connections in the said independent cooling loop; The evaporator coil 60 that comprises two groups of parallel connections in another independent cooling loop; One group of evaporator coil 6 in this independent cooling loop is arranged in same evaporimeter 3 with one group of evaporator coil 60 in another independent cooling loop, and another group evaporator coil 6 in this independent cooling loop is arranged in same evaporimeter 30 with another group evaporator coil 60 in another independent cooling loop.
As can be seen from Figure 1; Each independently refrigerating circuit comprise 1 compressor, 1 condenser, 2 * 0.5 evaporimeters and other refrigeration part; Wherein 0.5 evaporimeter meaning is that one group of evaporator coil is equivalent to the half the of whole evaporimeter to the refrigeration of surrounding air in the single independently refrigerating circuit; Promptly by 0.5 evaporimeter, and comprising the evaporator coils of two groups of parallel connections in the single independently refrigerating circuit, is 2 * 0.5 evaporimeters therefore.
Gas is sent in the condenser through pipeline after compressor compresses; Gas behind condenser is sent in the evaporimeter, then by the pressure fan that is located at evaporimeter one side, the air behind the air-conditioning is sent in the compartment; Regulate the temperature in the compartment; And, regulate refrigerating capacity through controlling the start-stop of compressor operating, satisfy refrigeration demand in the car thereby hope.
Yet because existing subway vehicle air conditioning unit only can be realized refrigerating capacity 50% and 100% two grade of adjusting; And cooling load receives influence that Changes in weather and passengers quantity change greatly in the railcar car, and two grades of refrigerating capacitys are regulated and caused temperature fluctuation bigger in the compartment in, and temperature is controlled inaccuracy; And efficiency is not high; Energy consumption is big, can't guarantee that the vehicle interior temperature fluctuation is little, and therefore the passenger also feels uncomfortable.
Summary of the invention
Big in order to overcome existing air conditioner of subway vehicle unit refrigerating capacity adjusting span, temperature control inaccuracy, the passenger is uncomfortable; And efficiency is not high, and the deficiency that energy consumption is big, one object of the present invention are to provide a kind of railcar unitary air conditioner unit; This air-conditioning unit can carry out multistage adjusting to refrigerating capacity according to refrigeration demand, and vehicle interior temperature control is more accurate, and temperature fluctuation is little; And energy-saving effect is remarkable, and passenger's comfort is good.
To achieve these goals; The technical scheme that the present invention adopted is: a kind of railcar unitary air conditioner unit, comprise at least two independently refrigerating circuits, and each refrigerating circuit comprises compressor; The condenser that is connected with compressor one end, the evaporator coil that is connected with condenser one end; This evaporator coil is connected with the compressor other end and constitutes the closed-loop path; Said evaporator coil is arranged in evaporimeter, and this evaporimeter one side is provided with pressure fan, and its design feature is to comprise the compressor of at least two parallel connections in each independent cooling loop.
For cooling velocity and the cooling effect that improves condenser, a side of said condenser is provided with condensation fan.
Comprise the evaporator coil of two groups of parallel connections in said each independent cooling loop, one group of evaporator coil in this independent cooling loop places same evaporimeter with one group of evaporator coil in another one or a plurality of refrigerating circuit.
The return air inlet of said air-conditioning unit is provided with the return air temperature sensor of cooling load in the inspection vehicle; The equal correspondence of each compressor one side is provided with the contactor that can make each compressor start and stop, and the air-conditioner controller that said return air temperature sensor and can be controlled each contactor folding links to each other.
Further purpose of the present invention is to provide a kind of control method of the vehicle unit of subway as stated formula air-conditioning unit, at first, and cooling load amount in the inspection vehicle; Regulate respectively the start and stop platform number of compressor in the independently refrigerating circuit then according to cooling load amount in the car that detects, make that the refrigerating circuit quantity of work is maximum.When the cooling load amount was higher in the car, compressor and starting platform number increased, and when in the car during cooling load amount, compressor and starting platform number reduces.When vehicle interior temperature one regularly, when bootable compressor had multiple choices, the compressor of startup can farthest utilize condenser and the heat exchange area of evaporimeter in the air-conditioning unit according to the invention.
Compressor is sent into condensing agent compression back in the condenser through pipeline; Divide two-way to get in the evaporator coil through pipeline at the condensing agent after condenser condenses under the condensation fan effect; And the evaporator coil ambient air cooled off, by pressure fan cooled air to be sent in the compartment then, the condensing agent temperature in this moment evaporator coil raises; Become gas, be back to and continue circularly cooling in the compressor.
The cooling load amount is preferably by the return air temperature sensor of the return air inlet that is arranged on the air-conditioning unit and gives air-conditioner controller with the vehicle interior temperature transfer of data in the said inspection vehicle; The cooling load amount is controlled the folding of each contactor respectively in the car that records according to return air temperature sensor of air-conditioner controller then, thereby controls the start and stop of each compressor.
The return air temperature sensor that is located at air-conditioning unit return air inlet is given air-conditioner controller with the vehicle interior temperature transfer of data, and air-conditioner controller calculates refrigeration demand in the car according to the vehicle interior temperature data, and the contactor in the air-conditioning system is controlled automatically; Said contactor breaks off; Then corresponding compressor quits work contactor closed communicating, the compressor starts work of a then corresponding side; Can regulate the temperature in the compartment through the start and stop of compressor in real time; Improve the refrigerating efficiency of air-conditioning unit and/or cut down the consumption of energy, improve passenger's comfort, also reached purpose of energy saving simultaneously.
When above-described air-conditioning unit comprises two independently refrigerating circuits, comprise the compressor of two parallel connections in each independent cooling loop, its control method is:
A), when cooling load is lower than 25% in return air temperature sensor records car, the closed connection of contactor in the air-conditioner controller output signal, four contactors, the compressor in four compressors is started working.
B), cooling load is higher than 25% and be lower than 50% in return air temperature sensor records car; Air-conditioner controller output signal; Contactor in four contactors and contactor are closed to be connected, and the compressor in the compressor in the first independent cooling loop and the second independent cooling loop carries out work.
C), cooling load is higher than 50% and when being lower than 75% in return air temperature sensor records car; Air-conditioner controller output signal; Contactor in four contactors, contactor, contactor is closed connects; Two compressors of opening in the first independent cooling loop carry out work, and a compressor of opening in the second independent cooling loop carries out work.
D), cooling load is higher than 75% and when being lower than 100% in return air temperature sensor records car; Air-conditioner controller output signal; Contactor, contactor, contactor, contactor are all closed to be connected, and opens all four compressors in two independent cooling loops.
When refrigeration in the car did not reach at full capacity, air-conditioner controller can be controlled the operating state of each compressor in real time according to the cooling load in the compartment, guaranteed passenger's comfortableness, thereby also reached purpose of energy saving.
Compared with prior art, the invention has the beneficial effects as follows: refrigerating capacity of the present invention can multistagely be regulated, and control automatically in real time; Made full use of the heat exchange area of condenser and evaporimeter; Refrigerating efficiency is high, and the air themperature uniformity is high in the good energy-conserving effect, vehicle; Temperature fluctuation is littler, and passenger's comfort is higher.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is existing air conditioner of subway vehicle unit refrigeration cyclic graph;
Fig. 2 is the refrigeration cyclic graph of one embodiment of the invention;
Fig. 3 is the one embodiment of the invention structured flowchart of control automatically;
Fig. 4 is the one embodiment of the invention practical circuit diagram of control automatically.
In the drawings
1,11,12,13, the 14-compressor; The 2-condenser; 3, the 30-evaporimeter;
The 4-pressure fan; The 5-condenser fan; 6, the 60-evaporator coil;
21,22,23, the 24-contactor; The 7-air-conditioner controller; The 8-return air temperature sensor.
The specific embodiment
A kind of railcar unitary air conditioner unit, as shown in Figure 2, comprise two independently refrigerating circuits; First refrigerating circuit comprises that the power of two parallel connections is the compressor 11,12 of 3.3KW, with compressor 11; The condenser 2 that 12 1 ends are connected; With the evaporator coil 6 that condenser 2 one ends are connected, this evaporator coil 6 is connected with compressor 11,12 other ends and constitutes the closed-loop path; Second refrigerating circuit comprises that the power of two parallel connections is the compressor 13,14 of 3.3KW, with compressor 13; The condenser 2 that 14 1 ends are connected; With the evaporator coil 60 that condenser 2 one ends are connected, this evaporator coil 60 is connected with compressor 13,14 other ends and constitutes the closed-loop path.The said first independent cooling loop comprises the evaporator coil 6 of two groups of parallel connections; The evaporator coil 60 that comprises two groups of parallel connections in the second independent cooling loop; One group of evaporator coil 6 in the first independent cooling loop places another group evaporator coil 6 in same evaporimeter 3, the first independent cooling loops to place with another evaporimeter 30 with another group evaporator coil 60 in second refrigerating circuit with one group of evaporator coil 60 in second refrigerating circuit.
For cooling velocity and the cooling effect that improves condenser 2, a side of said condenser 2 is provided with condensation fan 5.
A kind of control method of the vehicle unit of subway as stated formula air-conditioning unit, but in the return air inlet setting inspection vehicle of said air-conditioning unit the return air temperature sensor 8 of cooling load, like Fig. 3 and shown in Figure 4, this return air temperature sensor 8 is given air-conditioner controller 7 with the vehicle interior temperature transfer of data; Four compressors 11,12, the equal correspondence of 13,14 one sides is provided with four contactors 21; 22,23,24, said air-conditioner controller 7 is controlled four contactors 21 respectively according to cooling load amount in the car; 22,23,24 folding, thus four compressors 11 controlled; 12,13,14 start and stop.
The return air temperature sensor 8 that is located at air-conditioning unit return air inlet is given air-conditioner controller 7 with the vehicle interior temperature transfer of data, and air-conditioner controller 7 calculates refrigeration demand in the car according to the vehicle interior temperature data, and to the contactor in the air-conditioning system 21; 22,23,24 control automatically; Said contactor breaks off, and then corresponding compressor quits work the contactor closed communicating; The compressor starts work of a then corresponding side; Can regulate the temperature in the compartment through the start and stop of compressor in real time, improve passenger's comfort, also reach purpose of energy saving simultaneously.
Fig. 4 is the one embodiment of the invention practical circuit diagram of control automatically, and wherein the circuit diagram left side is the work loop feature, four compressors 11,12; Be provided with four contactors 21,22,23 of its start and stop of control in 13,14 the operating circuit; 24, the circuit diagram right side is the control loop part, and the cooling load amount is controlled four contactors 21,22 respectively in the car that air-conditioner controller 7 records according to return air temperature sensor 8; 23,24 folding, the circuit diagram upper left corner are the working powers of air-conditioning unit, and concrete parameter is AC380V; 50Hz, the circuit diagram upper right corner is the control loop power supply, concrete parameter is DC110V.
Concrete control procedure is:
A), when return air temperature sensor 8 records that cooling load is lower than 25% in the car, air-conditioner controller 7 output signals, four contactors 21; 22; CPK11 contactor 21 closed connections in 23,24, the compressor 11 in four compressors is started working; This moment, the compressor power consumption was lower than the half the of existing air-conditioning unit, and refrigerating efficiency has small size raising.
B), when recording in the car cooling load, return air temperature sensor 8 is higher than 25% and be lower than 50%, air-conditioner controller 7 output signals, four contactors 21; 22; CPK11 contactor 21 in 23,24 and CPK13 contactor 23 closed connections, the compressor 13 in the compressor 11 in the first independent cooling loop and the second independent cooling loop carries out work; This moment, the compressor power consumption was suitable with existing air-conditioning unit; But because air-conditioning unit of the present invention has utilized the area of dissipation of all 2 condensers and 2 evaporimeters, be equivalent to increase the heat exchange area of condensation and evaporation, improved system's refrigerating efficiency; And existing air-conditioning unit has only utilized the area of 1 condenser and 2 * 0.5 evaporimeters, so refrigerating efficiency of the present invention improves greatly.
C), when recording in the car cooling load, return air temperature sensor 8 is higher than 50% and when being lower than 75%, air-conditioner controller 7 output signals, four contactors 21; CPK11 contactor 21 in 22,23,24, CPK12 contactor 22, CPK13 contactor 23 closed connections; Open two compressors 11 in the first independent cooling loop; 12 carry out work, and a compressor 13 of opening in the second independent cooling loop carries out work, and the compressor power consumption is lower than existing air-conditioning unit; Be equivalent to 75% of existing air-conditioning unit, and refrigerating efficiency there is small size raising.
D), only, return air temperature sensor 8 is higher than 75% and when being lower than 100% when recording in the car cooling load; Air-conditioner controller 7 output signals, all four compressors 11 in two independent cooling loops are opened in CPK11 contactor 21, CPK12 contactor 22, CPK13 contactor 23, all closed connection of CPK14 contactor 24; 12; 13,14, the present invention's this moment is the same with refrigerating efficiency with existing air-conditioning unit energy consumption.
In sum; Through substituting the compressor of an existing 6.5KW behind two power compressor parallel that is 3.3KW; Cooling load is less than under the 25% refrigeration demand operating mode in car; The present invention and existing air-conditioning unit all need move a compressor can satisfy the refrigeration requirement, and two kinds of compressor power consumptions differ nearly one times; In refrigeration demand greater than 25% less than 50% working condition under, refrigerating efficiency of the present invention improves a lot; In refrigeration demand greater than 50% less than 75% working condition under, the present invention moves the compressor of three 3.3KW, and existing air-conditioning unit need move the compressor of two 6.5KW, power consumption of the present invention also is lower than existing air-conditioning unit; Greater than 75% o'clock, all compressors all need move in refrigeration demand, and two kinds of air-conditioning unit power consumption almost are identical.Therefore, the present invention in refrigeration demand less than having obvious energy-saving effect at 75% o'clock.
In addition, divide fourth gear to regulate according to the needs refrigerating capacity of cooling load in the car, improved the refrigerating efficiency of air-conditioning unit and/or reduced energy consumption, vehicle interior temperature compares with existing air-conditioning unit that to have uniformity better, and the passenger is more comfortable.
Claims (6)
1. a railcar unitary air conditioner unit comprises at least two independently refrigerating circuits, and each refrigerating circuit comprises compressor (11), the condenser (2) that is connected with compressor (11) one ends, the evaporator coil (6) that is connected with condenser (2) one ends; This evaporator coil (6) is connected with compressor (11) other end and constitutes the closed-loop path; Said evaporator coil (6) is arranged in evaporimeter (3), and these evaporimeter (3) one sides are provided with pressure fan (4), it is characterized in that, comprise the compressor (11) of at least two parallel connections in each independent cooling loop; The return air inlet of air-conditioning unit is provided with the return air temperature sensor (8) of cooling load in the inspection vehicle, each compressor (11,12,13; 14) the equal correspondence of a side is provided with the contactor (21 that can make each compressor (11,12,13,14) start and stop; 22,23,24), said return air temperature sensor (8) and can be controlled each contactor (21; 22,23,24) air-conditioner controller of folding (7) links to each other.
2. air-conditioning unit according to claim 1 is characterized in that, a side of said condenser (2) is provided with condensation fan (5).
3. air-conditioning unit according to claim 1; It is characterized in that; Comprise the evaporator coil (6) of two groups of parallel connections in said each independent cooling loop, the one group of evaporator coil (6) in this independent cooling loop places same evaporimeter (3) with the one group of evaporator coil (60) in another one or a plurality of refrigerating circuit.
4. the control method like the said railcar unitary air conditioner of one of claim 1～3 unit is characterized in that, at first, and cooling load amount in the inspection vehicle; Regulate respectively the start and stop platform number of compressor (11,12,13,14) in the independently refrigerating circuit then according to cooling load amount in the car that detects, make that the refrigerating circuit quantity of work is maximum.
5. control method according to claim 4 is characterized in that, the cooling load amount is to give air-conditioner controller (7) by the return air temperature sensor (8) of the return air inlet that is arranged on the air-conditioning unit with the vehicle interior temperature transfer of data in the said inspection vehicle; Air-conditioner controller (7) is controlled each contactor (21,22,23 respectively according to the interior cooling load amount of car that return air temperature sensor (8) records then; 24) folding, thus each compressor (11,12 controlled; 13,14) start and stop.
6. control method according to claim 5 is characterized in that, said air-conditioning unit comprises two independently refrigerating circuits, comprises the compressor (11) of two parallel connections in each independent cooling loop, and its control method is:
A), when return air temperature sensor (8) records that cooling load is lower than 25% in the car, air-conditioner controller (7) output signal, four contactors (21; 22; 23,24) contactor (21) in is closed to be connected, and the compressor (11) in four compressors is started working;
B), when recording in the car cooling load, return air temperature sensor (8) is higher than 25% and be lower than 50%; Air-conditioner controller (7) output signal; Four contactors (21,22,23; 24) contactor (21) in and another contactor (23) are closed to be connected, and compressor (11) in the first independent cooling loop and the compressor (13) in the second independent cooling loop carry out work;
C), when recording in the car cooling load, return air temperature sensor (8) is higher than 50% and when being lower than 75%, air-conditioner controller (7) output signal, four contactors (21; 22,23,24) wherein three contactors (21 in; 22,23) the closed connection opened two compressors (11 in the first independent cooling loop; 12) carry out work, a compressor (13) of opening in the second independent cooling loop carries out work;
D), when recording in the car cooling load, return air temperature sensor (8) is higher than 75% and when being lower than 100%, air-conditioner controller (7) output signal, whole contactor (21,22; 23,24) the closed connection opened all four compressors (11 in two independent cooling loops; 12,13,14).
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| CN2010101833067A CN101846413B (en) | 2010-05-26 | 2010-05-26 | Unitary air-conditioning unit of subway vehicle and control method thereof |
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| CN2010101833067A CN101846413B (en) | 2010-05-26 | 2010-05-26 | Unitary air-conditioning unit of subway vehicle and control method thereof |
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| CN101846413B true CN101846413B (en) | 2012-01-25 |
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| CN106515771B (en) * | 2016-12-14 | 2018-08-03 | 中车株洲电力机车有限公司 | A kind of compressor control method of rail vehicle fixed frequency air conditioner |
| CN109649114B (en) * | 2018-10-26 | 2023-10-10 | 杭州祥和实业有限公司 | New energy passenger train split type air conditioning system |
| CN111237988B (en) * | 2020-01-15 | 2021-05-28 | 北京天泽智云科技有限公司 | Control method and system for subway vehicle-mounted air conditioning unit |
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