CN202186388U

CN202186388U - Air conditioner for railway vehicle

Info

Publication number: CN202186388U
Application number: CN2011202810005U
Authority: CN
Inventors: 尹坤; 张永利; 王绅宇; 王强
Original assignee: Shandong Longertek Technology Co Ltd
Current assignee: Shandong Longertek Technology Co Ltd
Priority date: 2011-08-04
Filing date: 2011-08-04
Publication date: 2012-04-11
Anticipated expiration: 2021-08-04

Abstract

The utility model relates an air conditioner for a railway vehicle, composed of two sets of refrigeration cycle components, wherein each refrigeration cycle component set comprises a compressor, a condenser, a vaporizer, a liquid separator and a throttling element; the outlet of the condenser in each refrigeration cycle component set is connected with the inlet of the liquid separator; two outlets of the liquid separator after separation are connected with one throttling element; outlet ends of two throttling elements are connected with inlet ends of the vaporizers in two sets of refrigeration cycle components. In the utility model, the refrigerant firstly is separated and then is throttled and finally enters the vaporizer, so that the flow distribution of the refrigerant is more uniform and the heat exchange efficiency of the vaporizer is improved drastically.

Description

The used for rail vehicle A/C

Technical field

The utility model relates to a kind of A/C, and particularly a kind of A/C that is used on the guideway vehicle belongs to the guideway vehicle air-conditioning technical field.

Background technology

In guideway vehicle; Every joint compartment is equipped with two cover air-conditioning units; Every cover air-conditioning unit is by compressor, four-way cock, condenser, evaporator, device for drying and filtering, knockout, throttle unit, indoor fan and outdoor fan, and above-mentioned each parts are two, and each evaporator is all participated in two refrigerating cycle; Be used to guarantee the air-supply in the compartment, guarantee the traveling comfort that the passenger rides.

As shown in Figure 1, in the prior art, after refrigerant is discharged from compressor 1, through condenser 2 heat exchange; Get into device for drying and filtering 3, pass through throttle unit 4 throttlings again after, by knockout 5 dispense flow rate; Flow into two evaporators 6 respectively, flow back into compressor 1 after the heat exchange again, accomplish a refrigerating cycle.The weak point of this cycle mode is; Refrigerant is earlier through being shunted by knockout 5 after throttle unit 4 throttlings again; Because refrigerant is the gas-liquid mixed state through throttle unit 4 backs; Cause knockout 5 shuntings uneven, make that two evaporators, 6 shunting uneven phenomenon are more serious, thereby cause the exchange capability of heat of evaporator not give full play to.

Summary of the invention

The utility model main purpose is to address the above problem and is not enough, provides a kind of assignment of traffic more even, increases substantially the used for rail vehicle A/C of evaporator heat exchange efficiency.

For realizing above-mentioned purpose, the technical scheme of the utility model is:

A kind of used for rail vehicle A/C; Form by two cover refrigerating cycle assemblies; Every cover refrigerating cycle assembly comprises compressor, condenser, evaporator, knockout and throttle unit; The outlet of the said condenser in every cover refrigerating cycle assembly connects the inlet of said knockout, and two outlets after the shunting of said knockout insert a said throttle unit respectively, the exit end of two throttle units respectively with two cover refrigerating cycle assemblies in the arrival end of said evaporator be connected.

Further, said throttle unit is an electric expansion valve.

Further, on the pipeline between each said knockout and the corresponding said condenser, be connected in series a device for drying and filtering.

Content to sum up, the described used for rail vehicle A/C of the utility model, refrigerant are at first through carrying out throttling after the shunting again; And then get into evaporator more respectively; Refrigerant before the shunting is a high-pressure liquid, and it is more even to make that cold medium flux distributes, and has increased substantially the evaporator heat exchange efficiency.

Description of drawings

Fig. 1 is the prior art structural representation;

Fig. 2 is the utility model structural representation.

As depicted in figs. 1 and 2, compressor 1, condenser 2, device for drying and filtering 3, throttle unit 4, knockout 5, evaporator 6.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail:

As shown in Figure 2, a kind of used for rail vehicle A/C is made up of two cover refrigerating cycle assemblies; Every cover refrigerating cycle assembly comprises compressor 1, condenser 2, device for drying and filtering 3, throttle unit 4, knockout 5; Evaporator 6 connects through pipeline between each parts, forms two cover refrigerating cycle; When one of them compressor 1 broke down, another compressor 1 still can guarantee the normal operation of A/C, and then guaranteed air themperature and humidity in the compartment.

With a cover refrigerating cycle assembly wherein is the example explanation, and the exhausr port of compressor 1 is connected with the admission port of condenser 2, refrigerant in condenser 2 and air carry out sufficient interchange of heat; Warm high-voltage liquid state during refrigerant is condensed into by the gaseous state of HTHP, the high-pressure liquid refrigerant gets into knockout 5 again through behind the device for drying and filtering 3, and knockout 5 is a trousers type threeway knockout; 5 pairs of high-pressure liquid refrigerants that flowed out by condenser 2 of knockout are shunted; Be divided into two branch roads and flow out, serial connection one throttle unit 4 carries out throttling by 4 pairs of refrigerants of two throttle units respectively on each branch road; Refrigerant after the throttling is the state of low-temp low-pressure; The exit end of two throttle units 4 respectively with two cover refrigerating cycle assemblies in evaporator 6a be connected with the arrival end of evaporator 6b, refrigerant carries out interchange of heat with air in evaporator 6a and evaporator 6b, and then the temperature of reduction air; The air of low temperature is transported in the compartment through the air channel; Regulate the temperature and humidity in the compartment, the exit end of evaporator 6a and evaporator 6b gathers the back and is connected with the air return end of compressor 1, accomplishes a refrigerating cycle.Another set of refrigerating cycle is same as described above, does description no longer in addition.

Throttle unit 4 can be selected throttle capillary tube, also can select electric expansion valve, in the present embodiment, preferably adopts electric expansion valve, to reach the accuracy control of refrigerant.

Because refrigerant at first gets into knockout 5 shuntings after condenser 2 flows out; Refrigerant state before knockout 5 shuntings is a high-pressure liquid; Can farthest guarantee the even of knockout 5 shuntings this moment; Get into evaporator 6a and evaporator 6b respectively after 4 throttlings of process throttle unit separately again, and then guarantee that the cold medium flux of two evaporator 6a of entering and 6b is identical, increased substantially the heat exchange efficiency of evaporator.

As stated, in conjunction with the given scheme content of accompanying drawing, can derive the similar techniques scheme.In every case be the content that does not break away from the utility model technical scheme, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of the utility model technical scheme according to the technical spirit of the utility model.

Claims

1. used for rail vehicle A/C; Form by two cover refrigerating cycle assemblies; Every cover refrigerating cycle assembly comprises compressor, condenser, evaporator, knockout and throttle unit; It is characterized in that: the outlet of the said condenser in every cover refrigerating cycle assembly connects the inlet of said knockout, and two outlets after the shunting of said knockout insert a said throttle unit respectively, the exit end of two throttle units respectively with two cover refrigerating cycle assemblies in the arrival end of said evaporator be connected.

2. used for rail vehicle A/C according to claim 1 is characterized in that: said throttle unit is an electric expansion valve.

3. used for rail vehicle A/C according to claim 1 is characterized in that: on the pipeline between each said knockout and the corresponding said condenser, be connected in series a device for drying and filtering.