CN206278103U - A kind of railway vehicle air conditioner refrigeration system - Google Patents

Abstract

The utility model discloses a kind of railway vehicle air conditioner refrigeration system,Including the first refrigerating circuit and the second refrigerating circuit,First refrigerating circuit and the second refrigerating circuit include being connected in turn to form the evaporator of closed-loop path,Compressor,Condenser,Expansion valve and three-way pipe,Two three-way pipes are arranged at after expansion valve,Shunting end and the evaporator of two sets of refrigerating circuits of two three-way pipes homogeneously connect,Working medium after correspondence expansion valve throttling is shunted and is back to two evaporators by each three-way pipe,This is arranged on after expansion valve by by the three-way pipe of each refrigerating circuit,First pass through expansion valve throttling,Shunted by three-way pipe again,The mode for shunting afterwards that so first throttles reduces the usage quantity of expansion valve,And good result is obtained in actual applications,The railway vehicle air conditioner refrigerant system configurations are simple,And reduce enterprise's production capacity,This utility model is used for field of air conditioning used for rail vehicle.

Description

A kind of railway vehicle air conditioner refrigeration system

Technical field

The utility model is related to field of air conditioning used for rail vehicle, more particularly to a kind of railway vehicle air conditioner refrigeration system.

Background technology

Railway vehicle air conditioner differs greatly with general commercial and civil air conditioner, and rail vehicle air conditioner group is used exclusively for rail A kind of special air-conditioning system of road passenger train.

Rail vehicle air conditioner group has following features：1）Monoblock has larger refrigerating capacity, has generally included two steamings Hair device；2）Air-conditioner set air outlet generally has two, is symmetrically distributed in unit both sides, to realize that both sides air-supply is uniform during semi-load, The refrigerant of same compressor discharge must be shunted by two evaporators in system, and semi-load are a compressor operation, separately One working condition of shutdown；3）To make air-conditioner set that there is preferably refrigeration regulating power, increasing system throttles dress The deficiency single to make up capillary flow rate is put using heating power expansion valve；4）Air-conditioner set is arranged on vehicle roof, weight and sky Between it is severely limited, lightweight, spaces compact are its important features；5）The design of pipe-line system must be safe and reliable, meets RAMS, LCC requirement in IRIS.Additionally, vibratory impulse is big in train operation, air-conditioning system need to be firmly installed, and peace is needed if necessary Dress damping device, during chosen material, should as far as possible mitigate the weight of train, and selected materials possess good fire resistance to ensure Safety.

At present, the refrigeration system of domestic rail vehicle air conditioner group by complexity be generally divided into single system refrigeration system and Multisystem refrigeration system, urban transit air conditioning because of spaces compact and refrigerating capacity requirement is big, need to generally carry out multisystem design.

Conventional multisystem refrigeration system includes two compressors, is evaporated with a condenser, two per compressor Device forms independent system, and whole air-conditioner set is double autonomous systems.During refrigeration, from condenser liquid refrigerant out first By T-shape distributing T-pipe, then two evaporators are flowed to, before each evaporator is entered, throttled by heating power expansion valve respectively. Therefore, air-conditioner set need to use four heating power expansion valves during refrigeration, if air-conditioner set increases an evaporator, heating power expansion valve Two need to accordingly be increased, its increased quantity is the increased number of twice of evaporator.In addition, heating power expansion valve is a kind of structure essence Close flow control element, its is relatively costly, and generally unit price interval is at 300-500 yuans.On the valve body of heating power expansion valve There are the import and export and inductive loop of refrigerant, volume is larger, and installation site requirement is higher.Therefore, the use of heating power expansion valve Quantity is more, and not only manufacturing cost increases, and required installing space also corresponding bigger, the limited air-conditioning of this internal volume Unit is a technical barrier, meanwhile, heating power expansion valve quantity is more, and the interface of its welding is more, and such system refrigerant is deposited Also bigger in the risk of leakage, reliability accordingly declines.

Therefore, although current system design preferably solves asking for Flow-rate adjustment because of the commonly used of heating power expansion valve Topic, but also face that cost increase, space be urgent, the maintainable problem with reliability reduction simultaneously.

Utility model content

To solve the above problems, the utility model provides a kind of simple structure, railway vehicle air conditioner refrigeration with low cost System.

The utility model solves the technical scheme that its technical problem used：

A kind of railway vehicle air conditioner refrigeration system, including the first refrigerating circuit and the second refrigerating circuit, the first refrigerating circuit Include being connected in turn with the second refrigerating circuit to be formed the evaporator of closed-loop path, compressor, condenser, expansion valve and Three-way pipe, two three-way pipes are arranged at after expansion valve, and the shunting end of two three-way pipes is homogeneous with the evaporator of two sets of refrigerating circuits Connect, the working medium after correspondence expansion valve throttling is shunted and be back to two evaporators by each three-way pipe.

Used as the further improvement of above-mentioned technical proposal, the first refrigerating circuit includes the first evaporator, the first compressor, the One condenser, the first expansion valve and the first three-way pipe, the second refrigerating circuit include the second evaporator, the second compressor, second cold Condenser, the second expansion valve and the second three-way pipe, outlet, the second steaming of the first compressor, the second compressor with the first evaporator The outlet for sending out device is connected.

Used as the further improvement of above-mentioned technical proposal, the first three-way pipe is diverted to the first evaporator and the second evaporation respectively The length of pipe of device is equal, and the second three-way pipe is diverted to the first evaporator respectively and the length of pipe of the second evaporator is equal.

Used as the further improvement of above-mentioned technical proposal, expansion valve is electric expansion valve.

The beneficial effects of the utility model：This railway vehicle air conditioner refrigeration system sets by by the three-way pipe of each refrigerating circuit Put after expansion valve, first pass through expansion valve throttling, then shunted by three-way pipe, the mode for shunting afterwards that so first throttles is reduced The usage quantity of expansion valve, and good result is obtained in actual applications, the railway vehicle air conditioner refrigerant system configurations are simple, and Reduce enterprise's production capacity.

Brief description of the drawings

The utility model is described in further detail below in conjunction with the accompanying drawings：

Fig. 1 is the structural framing figure of railway vehicle air conditioner refrigeration system.

Specific embodiment

Reference picture 1, the utility model be a kind of railway vehicle air conditioner refrigeration system, including the first refrigerating circuit and second system Cold loop, the first refrigerating circuit and the second refrigerating circuit include being connected in turn to form evaporator, the pressure of closed-loop path Contracting machine, condenser, expansion valve and three-way pipe, two three-way pipes are arranged at after expansion valve, the shunting end of two three-way pipes with two sets The evaporator of refrigerating circuit is homogeneously connected, and the working medium after correspondence expansion valve throttling is shunted and be back to two evaporations by each three-way pipe Device.

It is arranged on after expansion valve by by the three-way pipe of each refrigerating circuit, first passes through expansion valve throttling, then by threeway Pipe is shunted, and the mode for shunting afterwards that so first throttles reduces the usage quantity of expansion valve, and obtains good effect in actual applications Really, the railway vehicle air conditioner refrigerant system configurations are simple, and reduce enterprise's production capacity.

Used as preferred embodiment, the first refrigerating circuit includes that the first evaporator 11, the first compressor 21, first are condensed Device 31, the first expansion valve 41 and the first three-way pipe 51, the second refrigerating circuit include the second evaporator 12, the second compressor 22, the Two condensers 32, the second expansion valve 42 and the second three-way pipe 52, the first compressor 21, the second compressor 22 with the first evaporator 11 outlet, the outlet of the second evaporator 12 are connected.

Used as preferred embodiment, the first three-way pipe 51 is diverted to the first evaporator 11 and the second evaporator 12 respectively Length of pipe is equal, and the second three-way pipe 52 is diverted to the first evaporator 11 respectively and the length of pipe of the second evaporator 12 is equal.

Used as preferred embodiment, expansion valve is electric expansion valve.

Used as preferred embodiment, the railway vehicle air conditioner refrigeration system includes two loops, is respectively the first refrigeration Loop and the second refrigerating circuit, the first refrigerating circuit include that the first evaporator 11, first for being in turn connected to form closed-loop path is pressed Contracting machine 21, the first condenser 31, the first expansion valve 41 and the first three-way pipe 51, the second refrigerating circuit include being in turn connected to form closing The second evaporator 12, the second compressor 22, the second condenser 32, the second expansion valve 42 and second three-way pipe 52 in loop are closed, is entered One step, the first expansion valve 41 and the second expansion valve 42 are electric expansion valve, two outlets of the first evaporator 11 respectively with First compressor 21 and the second compressor 22 are connected, two of the second evaporator 12 outlets respectively with the first compressor 21 and second Compressor 22 is connected, and the port of export of the first expansion valve 41 is connected with the first three-way pipe 51, two shunting ends of the first three-way pipe 51 Interface of the interface respectively with the first evaporator 11 and the second evaporator 12 is connected, the port of export of the second expansion valve 42 and the second threeway Pipe 52 is connected, and two shunting end interfaces of the second three-way pipe 52 connect with the interface of the first evaporator 11 and the second evaporator 12 respectively Connect, after the first three-way pipe 51 and the second three-way pipe 52 are separately positioned on into the first expansion valve 41 and the second expansion valve 42, this The result that sample is produced is that the working medium from condenser out first passes through expansion valve throttling, is shunted then through three-way pipe, because swollen The price of swollen valve is high, and the multiple expansion valves of installation further also it is also proposed higher wanting to installing space and mounting technique Ask, the installation number of expansion valve is reduced by this set-up mode that shunts afterwards of first throttling, reduce production cost.To ensure Shunting after throttling is uniform, and the length of pipe of the first refrigerating circuit and the second refrigerating circuit need to be made equal, namely the first three-way pipe 51 are diverted to the first evaporator 11 and the length of pipe of the second evaporator 12 is equal respectively, and the second three-way pipe 52 is diverted to respectively The length of pipe of one evaporator 11 and the second evaporator 12 is equal, the circuit lines between first the 11 to the first three-way pipe of evaporator 51 Circuit lines equal length between equal length, second the 12 to the second three-way pipe of evaporator 52, in addition, the first expansion valve 41 and Two expansion valves 42 are electric expansion valve, and the temperature-sensing element of each electric expansion valve is separately positioned on behind each correspondence three-way pipe.

Certainly, the utility model is not limited to above-mentioned implementation method, and those of ordinary skill in the art are without prejudice to originally Equivalent variations or replacement can be also made on the premise of utility model spirit, these equivalent deformations or replacement are all contained in the application In claim limited range.

Claims (4)

1. a kind of railway vehicle air conditioner refrigeration system, it is characterised in that：It is described including the first refrigerating circuit and the second refrigerating circuit First refrigerating circuit and the second refrigerating circuit include being connected in turn forming the evaporator of closed-loop path, compressor, cold Condenser, expansion valve and three-way pipe, three-way pipe is arranged at after expansion valve described in two, the shunting end of three-way pipe described in two with two sets The evaporator of refrigerating circuit is homogeneously connected, and the working medium after correspondence expansion valve throttling is shunted and be back to two by each three-way pipe Evaporator.

2. railway vehicle air conditioner refrigeration system according to claim 1, it is characterised in that：First refrigerating circuit includes First evaporator（11）, the first compressor（21）, the first condenser（31）, the first expansion valve（41）With the first three-way pipe（51）, Second refrigerating circuit includes the second evaporator（12）, the second compressor（22）, the second condenser（32）, the second expansion valve （42）With the second three-way pipe（52）, first compressor（21）, the second compressor（22）With the first evaporator（11）Go out Mouth, the second evaporator（12）Outlet be connected.

3. railway vehicle air conditioner refrigeration system according to claim 2, it is characterised in that：First three-way pipe（51）Point The first evaporator is not diverted to（11）With the second evaporator（12）Length of pipe it is equal, second three-way pipe（52）Divide respectively Flow to the first evaporator（11）With the second evaporator（12）Length of pipe it is equal.

4. the railway vehicle air conditioner refrigeration system according to claims 1 to 3 any one, it is characterised in that：The expansion Valve is electric expansion valve.