CN202304139U - Throttling device of air conditioning system in artificial climate room - Google Patents

Abstract

The utility model discloses a throttling device of an air conditioning system in an artificial climate room. The throttling device comprises a compressor, a condenser, electromagnetic valves, thermal expansion valves, evaporators, check valves, a control system, a temperature sensor, an artificial climate room internal part, pipelines, a control input line and a control output line. After a refrigerant is compressed by the compressor, the compressed refrigerant reaches the condenser. According to a temperature input signal acquired by the temperature sensor in the artificial climate room, the control system selectively opens a certain one of three temperature output lines according to the temperature demand. At the moment, the refrigerant sequentially passes through the opened electromagnetic valves and the expansion valves to reach the evaporators and is blown into the artificial climate room. Aiming at the characteristic that the internal temperature range of the artificial climate room is wide, by adopting a technique of combining a plurality of groups of expansion valves with a plurality of evaporators, the temperature control range is widened, the system can work normally at more kinds of ambient temperature, and the defects that the temperature control range of the traditional conditioner is narrow and the system design is limited by the expansion valves are overcome.

Description

The throttling arrangement of the indoor air-conditioning system of artificial climate

Technical field

The utility model relates to a kind of many expansion valve throttling devices of phjytotron air-conditioning system, belongs to artificial environment control field.

Background technology

Heating power expansion valve is a vitals of forming refrigerating plant, is one of four basic equipments in the refrigeration system.It is the throttling arrangement that the degree of superheat of control evaporator outlet gaseous refrigerant is controlled the refrigerant flow that gets into evaporimeter; When the high pressure refrigerant liquid after condenser condenses is passed through choke valve, pressure is descended, cause part refrigerant liquid gasification heat absorption because of receiving resistance.It has realized the throttling of condensing pressure to evaporating pressure, controls the flow of cold-producing medium simultaneously.Though the volume of heating power expansion valve is little, act on hugely, its work quality is directly connected to the work quality of whole refrigeration system.

The apolegamy of heating power expansion valve plays an important role to the performance performance of whole system.When heating power expansion valve and system do not match, few for a long time in the time of can making the refrigerant flow of system, little when big when causing the refrigerating capacity of heating power expansion valve.When refrigerating capacity is too small, can make the evaporimeter feed flow not enough, produce excessive temperature, can cause adverse influence to systematic function; When refrigerating capacity is excessive, can cause concussion, the intermittent evaporimeter feed flow that makes is excessive, causes the pressure of inspiration(Pi) of compressor big ups and downs to occur, even has liquid refrigerant to get into compressor, causes liquid hammer (wet stroke) phenomenon.Generally traditional comfort air conditioning system is narrower for temperature controlled regional extent, therefore only needs the single heating power expansion valve of configuration just can satisfy the regulation and control to refrigerating capacity.But when wider range is general; If still adopt traditional design of air conditioning, because single heating power expansion valve has to submit to the phenomenon of heating power expansion valve to a certain extent when the restriction on function and the performance just tends to occur system in matching Design.Therefore in order to solve this contradiction, consider that simultaneously phjytotron requires wider characteristics to temperature controlling range, the utility model has designed the throttling arrangement to the indoor air-conditioning system of artificial climate.

Summary of the invention

The purpose of the utility model is to overcome the defective that the design of traditional air-conditioning temperature control narrow range, system does not match with heating power expansion valve, system's refrigerating capacity receives the expansion valve restriction, the throttling arrangement of the indoor air-conditioning system of artificial climate that a kind of economic science is provided, can in the control temperature range of broad, regulate.

Many expansion valve throttling devices of phjytotron air-conditioning system comprise compressor; Condenser; The control system; Temperature sensor; First magnetic valve; First expansion valve; First evaporimeter; First check-valves; Second magnetic valve; Second expansion valve; Second evaporimeter; Second check-valves; The 3rd magnetic valve; The 3rd expansion valve; The 3rd evaporimeter; The 3rd check-valves; The artificial climate chamber interior; First pipeline; Second pipeline; The 3rd pipeline; The 4th pipeline; Control outlet line and control incoming line; Temperature sensor, first expansion valve, first evaporimeter, first check-valves, second expansion valve, second evaporimeter, second check-valves, the 3rd expansion valve, the 3rd evaporimeter, the 3rd check-valves are positioned at the artificial climate chamber interior; Compressor outlet and condenser and link to each other with an end of second pipeline, the 3rd pipeline, the 4th pipeline three road parallel pipelines after first pipeline serial connection, and first magnetic valve, first expansion valve, first evaporimeter, that first check-valves passes through the 4th pipeline is in sequential series; Second magnetic valve, second expansion valve, second evaporimeter, second check-valves are in sequential series through the 3rd pipeline; The 3rd magnetic valve, the 3rd expansion valve, the 3rd evaporimeter, the 3rd check-valves are in sequential series through second pipeline; First check-valves, second check-valves, three check-valves ends of the 3rd check-valves parallel connection access first pipeline once more link to each other with compressor inlet; First magnetic valve, second magnetic valve, three magnetic valves of the 3rd magnetic valve link to each other with control system one end through the control outlet line simultaneously, and the control system other end links to each other with phjytotron temperature inside sensor through controlling incoming line.

The utility model is to the requirement of phjytotron temperature requirements wider range and the defective of traditional air-conditioning; Adopted the technology of many expansion valves and multi-evaporator combination; Heating power expansion valve on the different pipelines is responsible for the control of refrigerant flow under the different temperatures zone respectively; Cooperation can be opened the road outlet line that wherein is complementary by the control of control system according to the temperature requirements of environment temperature actual in the climatic chamber and user's setting with temperature sensor and control system; So both enlarged the evaporating temperature scope of same set of air-conditioning system; Taken into account the temperature control under low temperature and the hot conditions simultaneously, the system that guaranteed can be under each temperature environment of wider range operate as normal, also guaranteed the coupling that system's refrigerating capacity and environment temperature meet under corresponding temperature.Simultaneously, under identical regulatory function, adopting this design of a plurality of heating power expansion valves on cost, will save 5-10 doubly than the employing electric expansion valve, is a kind of not only science but also economic throttling arrangement.

Description of drawings

Fig. 1 is the structural representation of many expansion valve throttling devices of phjytotron air-conditioning system.

The specific embodiment

As shown in Figure 1, many expansion valve throttling devices of phjytotron air-conditioning system comprise compressor 1, condenser 2, control system 3, temperature sensor 4, first magnetic valve 5, first expansion valve 6, first evaporimeter 7, first check-valves 8, second magnetic valve 9, second expansion valve 10, second evaporimeter 11, second check-valves 12, the 3rd magnetic valve 13, the 3rd expansion valve 14, the 3rd evaporimeter 15, the 3rd check-valves 16, artificial climate chamber interior 17, first pipeline 18, second pipeline 19, the 3rd pipeline 20, the 4th pipeline 21, control outlet line 22 and control incoming line 23; Temperature sensor 4, first expansion valve 6, first evaporimeter 7, first check-valves 8, second expansion valve 10, second evaporimeter 11, second check-valves 12, the 3rd expansion valve 14, the 3rd evaporimeter 15, the 3rd check-valves 16 are positioned at artificial climate chamber interior 17; Compressor 1 outlet and condenser 2 are after first pipeline, 18 serial connections; And link to each other with an end of second pipeline 19, the 3rd pipeline 20, the 4th pipeline 21 three road parallel pipelines, first magnetic valve 5, first expansion valve 6, first evaporimeter 7, first check-valves 8 are in sequential series through the 4th pipeline 21; Second magnetic valve 9, second expansion valve 10, second evaporimeter 11, second check-valves 12 are in sequential series through the 3rd pipeline 20; The 3rd magnetic valve 13, the 3rd expansion valve 14, the 3rd evaporimeter 15, the 3rd check-valves 16 are in sequential series through second pipeline 19; First check-valves 8,16 3 check-valves ends of second check-valves 12 the 3rd check-valves parallel connection once more insert first pipeline 18 and link to each other with compressor 1 import; First magnetic valve 5, second magnetic valve 9,13 3 magnetic valves of the 3rd magnetic valve link to each other with control system 3 one ends through control outlet line 22 simultaneously, and control system 3 other ends link to each other with the temperature sensor 4 of artificial climate chamber interior 17 through controlling incoming line 23.

The course of work of the utility model is following:

Cold-producing medium at first becomes the liquid refrigerant of HTHP through compressor compresses, then through becoming the liquid refrigerant of normal temperature high voltage after the condenser heat radiation.The temperature signal that collects according to the phjytotron internal temperature sensor; Be input to the control system through the input line; The a certain route road that is suitable under the Current Temperatures condition according to the temperature data that collects and the program set before, is selected to open through the control outlet line again by the control system.At this moment, the magnetic valve on a certain pipeline that the cold-producing medium that comes out from condenser passes through to open arrives the heating power expansion valve on this pipeline.Throttling through expansion valve; Cold-producing medium arrives evaporimeter corresponding on this pipeline with certain flow, owing to increase to the evaporimeter rear space from expansion valve quickly, pressure reduces; Thereby the liquid refrigerant vaporization becomes the cold-producing medium of cryogenic gaseous absorbs great amount of heat; Evaporator temperature reduces, and the cold-producing medium of cryogenic gaseous is got back to compressor along pipeline, works on to form one tunnel circulation.Heating power expansion valve on the different pipelines is responsible for the control of refrigerant flow under the different temperatures zone respectively, cooperates with temperature sensor and control system, can be according to the temperature requirements of environment temperature actual in the climatic chamber and user's setting.

The temperature sensor of the employing PLC of control system control computer, Chinese liquid crystal touch screen associating intelligence control system and Luo Zhuonike and corresponding communication, device drive circuit are formed; And setting up man-machine friendly interface through touch-screen and user, the user can be provided with required temperature parameter in real time according to the experiment demand.The control system can select to be fit to for system the expansion valve of this temperature according to the temperature that the user selects, to open corresponding circuit.Because the common broad of temperature requirements of phjytotron; Therefore the maximum characteristics of the utility model have been to adopt the technology of a plurality of evaporimeters and a plurality of expansion valves; Enlarged the evaporating temperature scope of same set of air-conditioning system; Can take into account the temperature control under low temperature and the hot conditions simultaneously, make system can be under the different temperatures environment operate as normal.

Claims (1)

1. the throttling arrangement of the indoor air-conditioning system of artificial climate is characterized in that comprising compressor (1), condenser (2), control system (3), temperature sensor (4), first magnetic valve (5), first expansion valve (6), first evaporimeter (7), first check-valves (8), second magnetic valve (9), second expansion valve (10), second evaporimeter (11), second check-valves (12), the 3rd magnetic valve (13), the 3rd expansion valve (14), the 3rd evaporimeter (15), the 3rd check-valves (16), artificial climate chamber interior (17), first pipeline (18), second pipeline (19), the 3rd pipeline (20), the 4th pipeline (21), control outlet line (22) and control incoming line (23); Temperature sensor (4), first expansion valve (6), first evaporimeter (7), first check-valves (8), second expansion valve (10), second evaporimeter (11), second check-valves (12), the 3rd expansion valve (14), the 3rd evaporimeter (15), the 3rd check-valves (16) are positioned at artificial climate chamber interior (17); Compressor (1) outlet and condenser (2) are after first pipeline (18) serial connection; And link to each other with an end of second pipeline (19), the 3rd pipeline (20), the 4th pipeline (21) three road parallel pipelines, first magnetic valve (5), first expansion valve (6), first evaporimeter (7), first check-valves (8) are in sequential series through the 4th pipeline (21); Second magnetic valve (9), second expansion valve (10), second evaporimeter (11), second check-valves (12) are in sequential series through the 3rd pipeline (20); The 3rd magnetic valve (13), the 3rd expansion valve (14), the 3rd evaporimeter (15), the 3rd check-valves (16) are in sequential series through second pipeline (19); First check-valves (8), second check-valves (12), (16) three check-valves ends of the 3rd check-valves parallel connection access first pipeline (18) once more link to each other with compressor (1) import; First magnetic valve (5), second magnetic valve (9), (13) three magnetic valves of the 3rd magnetic valve link to each other with control system (3) one ends through control outlet line (22) simultaneously, and control system (3) other end links to each other with the temperature sensor (4) of artificial climate chamber interior (17) through controlling incoming line (23).

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