CN203419145U

CN203419145U - Continuously variable energy regulation heat-pump air conditioning unit of rail vehicle

Info

Publication number: CN203419145U
Application number: CN201320578567.8U
Authority: CN
Inventors: 杨雪东; 姚晓庆; 沈寅昶; 赵学文; 余强
Original assignee: New United Air-Conditioning System (jiangsu) Co Ltd
Current assignee: New United Rail Transit Technology Co Ltd
Priority date: 2013-09-18
Filing date: 2013-09-18
Publication date: 2014-02-05
Anticipated expiration: 2023-09-18

Abstract

The utility model relates to a continuously variable energy regulation heat-pump air conditioning unit of a rail vehicle. Bypass pipelines and bypass valves, which are connected in parallel with heat exchangers and a bidirectional electronic expansion valve, are additionally arranged on an air conditioning loop consisting of an inside heat exchanger, the bidirectional electronic expansion valve, an outside heat exchanger, a four-way reversing valve and a compressor, and the heat exchangers and the expansion valve are connected in series with each other. The flow of a refrigerant passing through an evaporator and a condenser can be changed by controlling the openness of the bypass valves, then the output of refrigerating capacity or heating capacity of the air conditioning unit is changed, and finally, the temperature in a compartment of the rail vehicle can be precisely and steadily controlled so as to improve the comfortableness in the compartment.

Description

The electrodeless capacity control heat pump air conditioner of used for rail vehicle unit

Technical field

The utility model relates to a kind of heating and refrigeration train assembly system that utilizes compressor, is specifically related to the electrodeless capacity control heat pump air conditioner of a kind of used for rail vehicle unit.

Background technology

Progress along with social development, science and technology, guideway vehicle has become the important passenger vehicles of people's trip, passenger has had renewal, higher requirement for the environmental degree of comfort in compartment and air quality, the assurance of rail vehicle air conditioner group and environmental degree of comfort in compartment and air quality place one's entire reliance upon.Current existing railway vehicle air conditioner is all generally Dan Lengding electro heat air-conditioning unit frequently, when air-conditioning unit is worked, according to interior temperature, control compressor or electrically heated startup and stop, carry out the control of cold or heat, compressor or electrically heated continuous start and stop not only make the energy consumption of air-conditioning unit larger, and can make the temperature fluctuation of interior large, traveling comfort is poor, makes passenger have sometimes hot and sometimes cold sensation.

Summary of the invention

The technical problems to be solved in the utility model is: overcome the deficiency in prior art, the electrodeless capacity control heat pump air conditioner of a kind of used for rail vehicle unit is provided, solve the problem that prior art middle orbit vehicle air conditioning is difficult to take into account reliability and control accuracy.

The utility model solves the technical scheme that its technical matters adopts: the electrodeless capacity control heat pump air conditioner of a kind of used for rail vehicle unit, comprise by H Exch in car, bidirectional electronic expansion valve, the closed loop that two ports of car outer heat-exchanger and four-way change-over valve are connected successively and formed, two other port of described four-way change-over valve is connected with mouth with the input end of compressor respectively, in described car, a side of H Exch is provided with car inner blower, one side of described car outer heat-exchanger is provided with the outer blower fan of car, the first by passage is in parallel with H Exch in the car being cascaded and bidirectional electronic expansion valve, on described the first by passage, the first bypass disc is installed, the second by passage is in parallel with the car outer heat-exchanger being cascaded and bidirectional electronic expansion valve, described the first bypass disc, the second bypass disc and air-conditioner controller control linkage, described air-conditioner controller is also connected with return air temperature sensor, wind pushing temperature sensor, new air temperature sensor.

As preferably, for the ease of controlling and improving the precision of controlling, described the first bypass disc and the second bypass disc are the electronic bypass disc of electrodeless adjusting.

When carrying out refrigerating cycle, the expansion direction of described bidirectional electronic expansion valve be from car outer heat-exchanger to car in H Exch, described the first bypass disc is in closed condition; When execution heats circulation time, the expansion direction of described bidirectional electronic expansion valve is from H Exch in car to car outer heat-exchanger, and described the second bypass disc is in closed condition.

In order to improve the reliability of system, compressor is selected by determining the motor-driven hermetic compressor of frequency.

The beneficial effects of the utility model are, the utility model has increased by passage and the bypass disc in parallel with the H Exch being cascaded and expansion valve on the pipeline of existing heat pump air conditioner, by controlling the aperture of bypass disc, just can change refrigerant through the flow of evaporator or condenser, change the refrigerating capacity of air-conditioning unit or the output of heating capacity, thereby avoided by opening and stopping the situation that compressor causes the refrigerating capacity of air-conditioning unit or the output mutation of heating capacity, finally accurately pulsation-free is controlled the temperature in railway carriage, improve the traveling comfort in compartment, and only need that existing refrigerant circuit is done to very little change and can realize temperature control, there is high reliability.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the refrigerant flow direction schematic diagram of Fig. 1 while carrying out refrigerating cycle;

Fig. 3 is that Fig. 1 carries out the refrigerant flow direction schematic diagram that heats circulation time;

In figure: 1. the outer blower fan of car; 2. car inner blower; 3. compressor; 4. four-way change-over valve; 5. car outer heat-exchanger; 6. H Exch in car; 7. bidirectional electronic expansion valve; 8. the first bypass disc; 9. the second bypass disc.

The specific embodiment

By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.

Preferred embodiment of the present utility model as shown in Figure 1, 4 times side entrance copper pipes of compressor 3 exhausr ports and four-way change-over valve link together, four-way change-over valve 4 right sides and 5 imports of car outer heat-exchanger link together by copper pipe, car outer heat-exchanger 5 right part ports and bidirectional electronic expansion valve 7 link together by copper pipe, in bidirectional electronic expansion valve 7 other ends and car, the left part port of H Exch 6 links together by copper pipe, in car, right part port and the four-way change-over valve 4 left side entrances of H Exch 6 link together by copper pipe, four-way change-over valve 4 central exits and compressor 3 admission ports link together by copper pipe, with upper-part, by copper pipe, be connected to form existing refrigerant circuit.In car, a side of H Exch 6 is provided with car inner blower 2, and a side of car outer heat-exchanger 5 is provided with the outer blower fan 1 of car.In car, between the right part port of H Exch 6 and four-way change-over valve 4 left sides, be provided with the first by passage, the first by passage other end is arranged between car outer heat-exchanger 5 right part ports and bidirectional electronic expansion valve 7, and the first by passage is provided with the first bypass disc 8.Between four-way change-over valve 4 right sides and car outer heat-exchanger 5 left part ports, the second by passage is set, the second by passage other end is arranged between bidirectional electronic expansion valve 7 and the interior H Exch 6 left part ports of car, and the second by passage is provided with the second bypass disc 9.In the situation that the normal operation of air-conditioning does not need regulation output, the first bypass disc 8 second bypass discs 9 are all in closure state.Described the first bypass disc 8, the second bypass disc 9 and air-conditioner controller control linkage, air-conditioner controller is also connected with return air temperature sensor, wind pushing temperature sensor and new air temperature sensor.

As shown in Figure 2, when carrying out refrigerating cycle, in car, H Exch 6 is as evaporator operation, and car outer heat-exchanger 5 moves as condenser.Return air temperature sensor in a/c system, wind pushing temperature sensor and new air temperature sensor are by the temperature of each node of perception a/c system, in air-conditioner controller, change into control signal, and then the aperture of controlling the second bypass disc 9 can make the part back flow of refrigerant in loop, reduce the refrigerant flow that car external heat exchanger 5 evaporates of flowing through, compressor operating power is constant, just flow through the second bypass disc 9 and not participate in the refrigerant flow of car condensed exterior heat release controlled, and then realize the accurately controlled of refrigerating capacity in car.

As shown in Figure 3, when carrying out heat cycles, four-way change-over valve 4 changes the flow direction of refrigerant, and bidirectional electronic expansion valve 7 changes the expansion direction of refrigerant, and in car, H Exch 6 moves as condenser, and car outer heat-exchanger 5 moves as evaporator.Return air temperature sensor in a/c system, wind pushing temperature sensor and new air temperature sensor are by the temperature of each node of perception a/c system, in air-conditioner controller, change into control signal, and then the aperture of controlling the first bypass disc 8 changes the refrigerant flow that H Exch 6 carries out condensation in car of flowing through, compressor operating power is constant, just flow through the first bypass disc 8 and not participate in the refrigerant flow of condensation heat release in car controlled, and then realize the accurately controlled of heating capacity in car.

Bypass disc can adopt the controlled valves of any opening degree such as existing ball valve, needle-valve, ceramic plate valve, preferably selects the electronic bypass disc of electrodeless adjusting, and convenient control, has again larger range of control and precision.

The above-mentioned foundation desirable embodiment of the present utility model of take is enlightenment, and by above-mentioned description, relevant staff can, within not departing from the scope of this utility model technological thought, carry out various change and modification completely.The technical scope of this utility model is not limited to the content on specification sheets, must determine its technical scope according to claim scope.

Claims

1. the electrodeless capacity control heat pump air conditioner of a used for rail vehicle unit, comprise by H Exch in car (6), the closed loop that two ports of car outer heat-exchanger (5) and four-way change-over valve (4) are connected successively and formed, two other port of described four-way change-over valve (4) is connected with mouth with the input end of compressor (3) respectively, in described car, a side of H Exch (6) is provided with car inner blower (2), one side of described car outer heat-exchanger (5) is provided with the outer blower fan (1) of car, it is characterized in that: in described car, between H Exch (6) and car outer heat-exchanger (5), be also in series with bidirectional electronic expansion valve (7), the first by passage is in parallel with H Exch (6) in the car being cascaded and bidirectional electronic expansion valve (7), the first bypass disc (8) is installed on described the first by passage, the second by passage is in parallel with the car outer heat-exchanger (5) being cascaded and bidirectional electronic expansion valve (7), described the first bypass disc (8), the second bypass disc (9) and air-conditioner controller control linkage, described air-conditioner controller is also connected with return air temperature sensor, wind pushing temperature sensor, new air temperature sensor.

2. the electrodeless capacity control heat pump air conditioner of a kind of used for rail vehicle according to claim 1 unit, is characterized in that: described the first bypass disc (8) and the second bypass disc (9) are the electronic bypass disc of electrodeless adjusting.

3. the electrodeless capacity control heat pump air conditioner of a kind of used for rail vehicle according to claim 1 unit, it is characterized in that: when carrying out refrigerating cycle, the expansion direction of described bidirectional electronic expansion valve (7) is interior H Exch (6) from car outer heat-exchanger (5) to car, and described the first bypass disc (8) is in closed condition; When execution heats circulation time, the expansion direction of described bidirectional electronic expansion valve (7) is from H Exch in car (6) to car outer heat-exchanger (5), and described the second bypass disc (9) is in closed condition.

4. the electrodeless capacity control heat pump air conditioner of a kind of used for rail vehicle according to claim 1 unit, is characterized in that: described compressor (3) is by determining the motor-driven hermetic compressor of frequency.