CN1317537C - Critical-cross carbon dioxide refrigerating system restriction sleeve - Google Patents

Critical-cross carbon dioxide refrigerating system restriction sleeve Download PDF

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CN1317537C
CN1317537C CN 200510029500 CN200510029500A CN1317537C CN 1317537 C CN1317537 C CN 1317537C CN 200510029500 CN200510029500 CN 200510029500 CN 200510029500 A CN200510029500 A CN 200510029500A CN 1317537 C CN1317537 C CN 1317537C
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piston
cylinder
inlet
high pressure
throttle
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CN 200510029500
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Chinese (zh)
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CN1737472A (en )
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金纪峰
陈江平
陈芝久
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上海交通大学
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler
    • F25B41/06Flow restrictors, e.g. capillary tubes; Disposition thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2309/00Gas cycle refrigeration machines
    • F25B2309/06Compression machines, plant or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061Compression machines, plant or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2341/00Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06Details of flow restrictors or expansion valves
    • F25B2341/066Refrigeration circuits using more than one expansion valve
    • F25B2341/0661Refrigeration circuits using more than one expansion valve arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0411Refrigeration circuit bypassing means for the expansion valve or capillary tube

Abstract

一种跨临界二氧化碳制冷系统节流短管,属于制冷技术领域。 A cross Carbon Dioxide Refrigeration System short tube orifice, which belongs to the field of refrigeration technology. 本发明包括:阀体、高压气体进口、进口过滤网、高压腔、气缸、活塞上止点、活塞、密封圈、调节螺栓、弹簧、主节流短管、辅助节流短管、低压腔、出口过滤网、低压液体出口,高压腔的一端与高压气体进口相连,在高压气体进口的后面设有进口过滤网,气缸与高压腔的另一端相连接,在气缸中依次设有活塞、弹簧、调节螺栓和密封圈,活塞上止点设在气缸的顶端,两个相互平行的主节流短管和辅助节流短管垂直设在阀体中,主节流短管的入口与高压腔直接相连通,辅助节流短管的入口与气缸相连通。 The present invention comprises: a valve body, a high pressure gas inlet, inlet filter, the high pressure chamber, the cylinder, the piston top dead center, the piston ring, the adjusting bolt, the spring, the main throttle short pipe, the auxiliary short tube orifice, low pressure chamber, an outlet filter, one end of a low pressure inlet connected to the liquid outlet, the high pressure chamber and a high pressure gas inlet filter is provided behind the high pressure gas inlet, the other end of the cylinder and the high pressure chamber is connected, in turn provided with a piston in a cylinder, a spring, adjusting bolt and seal, the piston is provided at the top dead center of the cylinder, the two mutually parallel main and auxiliary throttle stub short tube orifice provided in the valve body perpendicular to the main throttle inlet stub direct high pressure chamber communicating the inlet with the auxiliary cylinder communicating short tube orifice.

Description

跨临界二氧化碳制冷系统节流短管 Transcritical carbon dioxide refrigerating systems short tube orifice

技术领域 FIELD

本发明涉及的是一种制冷技术领域的构件,具体地说,是一种跨临界二氧化碳制冷系统节流短管。 The present invention relates to the technical field of cooling member, in particular, supercritical carbon dioxide refrigeration system is a cross-throttle stub.

背景技术 Background technique

目前,对二氧化碳作为替代制冷剂的研究范围几乎涉及了制冷空调的所有领域。 Currently, as a substitute for the carbon dioxide refrigerant studies range covers almost all areas of the refrigeration and air conditioning. 由于汽车空调本身具有颠簸剧烈,运行工况恶劣的特点,制冷剂泄漏严重,因而成为以二氧化碳为替代制冷剂的应用首选。 As the car itself has air conditioning violent jolt, harsh operating conditions of the characteristics of a refrigerant leak severely, and thus become the application of choice for carbon dioxide as an alternative refrigerant. 如Lorentzen和Pettersen所述,典型的跨临界二氧化碳汽车空调系统主要由压缩机、气冷器、节流元件、蒸发器、低压贮液器、中间换热器组成。 As the Lorentzen and Pettersen, a typical automobile air conditioning system across the supercritical carbon dioxide is mainly composed of a compressor, a gas cooler, throttling element, an evaporator, a low pressure liquid reservoir, an intermediate heat exchanger components. 同时,在跨临界二氧化碳制冷循环中存在一个最优压力,此时系统的性能系数(COP)最大。 Meanwhile, there is an optimal pressure carbon dioxide refrigerant in a transcritical cycle, then the coefficient of performance (COP) of the maximum. 当高压侧压力低于优化压力时,制冷能力迅速下降,而耗功基本维持不变,甚至会有所增加,从而导致系统性能的明显下降。 When the pressure is lower than the high pressure side pressure optimization, the cooling capacity decreased rapidly, while the power consumption of essentially unchanged, or even increased, resulting in decreased system performance. 在汽车空调系统中,环境空气温度、蒸发温度和压缩机转速都有大的变化,再加上在高温工况下对制冷能力最大化和能耗最小的要求,所有这些都导致了对系统压力进行控制的要求。 In the automotive air conditioning system, the ambient air temperature, an evaporation temperature and the compressor rotational speed changes are great, plus the minimum conditions required to maximize the refrigeration capacity and energy consumption at high temperatures, all leading to the system pressure required for control. 就目前所建立的二氧化碳汽车空调原型系统而言,采用外控式的变排量压缩机和电子膨胀阀的组合方式,可以满足系统在怠速和行驶时的降温性能。 In terms of carbon dioxide automotive air conditioning systems currently established prototype, using a combination of external control type variable displacement compressor and the electronic expansion valve, the cooling system can meet the performance and running at idle. 但是,由于变排量压缩机和电子膨胀阀的制造成本都相当高,从而使得整个二氧化碳汽车空调系统的成本较现在普遍使用的以R134a为制冷剂的汽车空调系统的成本高得多。 However, since the variable displacement compressor and the electronic expansion valve manufacturing costs are quite high, so that the cost of the whole carbon dioxide automobile air conditioning system is much higher than the cost of the automobile air conditioning system to the refrigerant R134a is now widely used. 工业界正在寻求一种折衷的办法,使得二氧化碳汽车空调系统的性能既能满足使用上的要求,而成本又不至于较R134a系统升高太多。 Industry is seeking a compromise approach, making the performance of carbon dioxide automotive air conditioning system that meets the requirements of use, and increased costs but not so much compared to R134a system. 一种可行的做法就是在二氧化碳汽车空调系统中采用类似于节流短管的节流元件。 One possible approach is to use a short tube orifice of the throttle element similar to the carbon dioxide in automotive air conditioning systems.

经对现有技术的文献检索发现,中国专利公开号为CN 1580672A,公开日为2005年2月16日,专利名称为:跨临界二氧化碳制冷系统全机械式节流控制机构,该专利自述为:“主要包括节流阀、气液分离器、混合器、热力膨胀阀、高压控制阀,其中高压控制阀包括:高压控制阀调节流路、高压控制阀主流路、进气控制活塞、进气控制弹簧、调节螺栓、调节杆控制活塞、调节杆控制弹簧、调节杆。热力膨胀阀的开度受控于蒸发器出口的制冷剂过热度,通过开度的调节,达到调节蒸发压力和控制制冷剂过热度的作用;高压侧压力的控制是通过高压控制阀控制进入膨胀阀进口的制冷剂气体含量来实现。”其不足之处是:由于该节流机构实际上由三个阀件部分组成,故结构复杂;特别是高压控制阀的结构庞大,制造成本相对较高,可靠性不高,并且只适用于采用定 By the prior art literature search for found, Chinese Patent Publication No. CN 1580672A, publication date February 16, 2005, and entitled: transcritical carbon dioxide refrigerating systems fully mechanical throttle control mechanism, which patent is readme: "includes a throttle valve, a gas-liquid separator, a mixer, a thermostatic expansion valve, high-pressure control valve, wherein the high pressure control valve comprising: a high pressure control valve regulates the flow passage, the main high-pressure control valve passage, an intake control piston, the intake control spring, adjusting screw, the control piston adjusting lever, the adjusting lever control spring, the adjusting lever. opening degree of the thermal expansion valve is controlled by the degree of superheat of the refrigerant outlet of the evaporator, through the opening degree adjustment, to regulate and control the evaporation pressure of the refrigerant effect of the degree of superheat; controlled high-pressure side pressure control valve is a high pressure refrigerant into the gas content of the expansion valve inlet to achieve "its shortcomings: because the throttle valve means actually consists of three parts. therefore, complex structure; particularly bulky high-pressure control valve structure, the manufacturing cost is relatively high, the reliability is not high, and only available for a given 量压缩机的二氧化碳制冷系统。 Carbon dioxide refrigerant of the compressor system.

发明内容 SUMMARY

本发明的目的在于克服现有技术的不足,提供一种跨临界二氧化碳制冷系统节流短管,使其采用一种机械式的带有内部旁通功能的节流短管作为节流元件,其流量可以根据节流短管进口高压的变化实现自动调节。 Object of the present invention is to overcome the disadvantages of the prior art, there is provided a transcritical carbon dioxide refrigerating systems short tube orifice, it uses a mechanical expansion with internal bypass function as a throttle element a short pipe, which traffic can automatically adjusted for the short tube orifice inlet pressure.

本发明是通过以下技术方案实现的,本发明包括:阀体、高压气体进口、进口过滤网、高压腔、气缸、活塞上止点、活塞、密封圈、调节螺栓、弹簧、主节流短管、辅助节流短管、低压腔、出口过滤网、低压液体出口,高压腔的一端与高压气体进口相连,在高压气体进口的后面设有进口过滤网,气缸与高压腔的另一端相连接,在气缸中依次设有活塞、弹簧、调节螺栓和密封圈,活塞上止点设在气缸的顶端,两个相互平行的主节流短管和辅助节流短管与气缸相互垂直设在阀体中,主节流短管的入口与高压腔直接相连通,辅助节流短管的入口设在气缸的缸壁上,主节流短管和辅助节流短管的入口分别设在活塞上止点的左右两侧,主节流短管与辅助节流短管的出口均与低压腔的一端相连接,低压液体出口与低压腔的另一端相连接,在低压液体出口之前设 The present invention is achieved by the following technical solutions, the present invention comprises: a valve body, a high pressure gas inlet, inlet filter, the high pressure chamber, the cylinder, the piston top dead center, the piston ring, the adjusting bolt, the spring, the main throttle short tube auxiliary throttle short tube, the low pressure chamber, an outlet filter, a low-pressure fluid outlet, one end of the high pressure chamber is connected to the high pressure gas inlet, inlet filter is provided behind the high pressure gas inlet, the other end of the cylinder and connected to the high pressure chamber, sequentially provided in the cylinder of the piston, spring, adjusting screw and the ring, the piston at the top dead center of the cylinder is provided, two mutually parallel main and auxiliary throttle orifice stub tube short cylinder provided in the valve body perpendicular the high pressure inlet chamber, the main throttle short tube communicating directly, the auxiliary inlet stub orifice provided on the cylinder wall of the cylinder, an inlet stub and an auxiliary main throttle orifice short tube are provided in the piston top dead center the left and right sides of the point, the main throttle the outlet orifice of the auxiliary short stub pipe are connected to one end of the low pressure chamber, the other end of the low pressure liquid and low-pressure chamber is connected to the outlet, a liquid outlet provided at a low pressure before 出口过滤网,活塞的一侧与活塞上止点配合,活塞的另一侧始终固定在弹簧的一端,弹簧的另一端限定在调节螺栓上,调节螺栓与气缸的底端壁面之间采用螺纹连接,在调节螺栓上开槽设有密封圈。 An outlet filter, the side of the piston with the piston top dead center, the other side of the piston remains fixed end of the spring, the other end of the spring is defined in the adjustment screw, adjusting bolt between the bottom wall surface of the cylinder using a threaded connection , the adjusting bolt provided on the slotted ring.

所述的活塞上止点为环形结构。 Top dead center of the piston has an annular structure.

所述的主节流短管和辅助节流短管均是圆形管道。 Said main and auxiliary throttle orifice short stub tube are circular duct.

所述的活塞,其厚度大于辅助节流短管的流通直径。 The piston, a thickness greater than the diameter of the auxiliary flow restrictor short tube.

由于初始弹簧预紧力P1的作用,活塞的初始位置为右端面(即不与弹簧相连的一侧)与活塞上止点的左侧表面相接触。 Since the initial action of the spring biasing force P1 of the initial position of the piston to the right end surface (i.e., the side not connected to the spring) and the left side surface of the piston top dead point of contact. 此时,辅助节流短管的入口被活塞封闭,不与高压腔相连通。 At this time, the auxiliary inlet stub is closed throttle piston, is not connected to the high pressure chamber through. 也就是说,在活塞尚未发生移动之前,高压腔中的高温高压气体将只能通过主节流短管进行降压节流。 That is, before movement of the piston has not yet occurred, the high pressure chamber of the pressure gas can be throttled down through the short tube main throttle. 弹簧的初始预紧力P1的大小可以通过调节螺栓进行调整:顺时针旋转调节螺栓,弹簧的压缩变形量增大,则弹簧的初始预紧力变大;反之,逆时针旋转调节螺栓,弹簧的压缩变形量减小,则弹簧的初始预紧力变小。 P1 is the initial magnitude of the spring preload can be adjusted by adjusting the screw: the adjusting bolt is rotated clockwise, the spring compression deformation amount increases, the initial spring preload increases; conversely, counterclockwise rotation of the adjusting bolt, the spring amount of compressive deformation decreases, then the initial spring preload decreases. 同时,为了避免活塞在沿气缸壁面的移动过程中出现卡死辅助节流短管入口的现象,活塞的厚度应保证比辅助节流短管的流通直径要大。 Meanwhile, in order to avoid the piston jamming occurs secondary throttle phenomenon short tube inlet during movement along the cylinder wall, the thickness of the piston should ensure the flow diameter than the auxiliary throttle to a large short tube.

在使用本发明作为节流元件的跨临界二氧化碳汽车空调系统中,假设系统中的压缩机为定排量压缩机。 In the transcritical carbon dioxide automotive air conditioning system of the present invention is used as throttle element, the assumption that the system compressor is a constant displacement compressor. 当系统刚开始启动时,由于压差尚未完全建立,此时压缩机中的排气压力和温度逐渐升高,而吸气压力和温度逐渐降低。 When the system has just started, because pressure has not been fully established, when the compressor discharge pressure and the temperature is gradually increased, and the suction pressure and the temperature was gradually lowered. 由压缩机排出的高温、高压气体经高压换热器进行放热后,进入本发明的高压气体进口,流经进口过滤网进行气体杂质过滤后流入高压腔。 High temperature discharged from the compressor, high pressure gas through a high pressure heat exchanger, according to the present invention into the high-pressure gas inlet, through the inlet filter into the high pressure chamber for gaseous impurities filtered. 此时高压制冷剂是单独通过主节流短管,还是同时通过主节流短管和辅助节流短管进行降压节流作用,将取决于弹簧的初始预紧力的大小。 At this time, a separate high-pressure refrigerant by the main throttle short tube or also by the size of the main throttle and the secondary throttle short stub tube antihypertensive throttling action will depend on the initial spring preload. 一般来说,弹簧的初始预紧力应调整为在系统的大部分运行工况下,主节流短管的制冷剂流量能够满足要求,而不必使制冷剂流过辅助节流短管。 Generally, initial preload of the spring should be adjusted to operating conditions in most systems, the refrigerant flow tube of the main throttle short to meet the requirements, without having to throttle the refrigerant flows through the auxiliary stub. 即主节流短管的流通横截面积应与系统在使用电子膨胀阀作为节流元件时的通用流通面积相当,即在大部分运行工况下,主节流短管的制冷剂流通能力都能够满足系统运行在最优压力工况下。 General flow area when the cross sectional area of ​​the main throttle, i.e. the flow tube should be short in the system using an electronic expansion valve as a throttle element considerably, i.e. in most operating conditions, the flow capacity of the main throttle the refrigerant tubes are short able to meet the system operating conditions at optimal pressure.

由于在系统启动之初,高压腔中的压力P小于弹簧的初始预紧力P1,活塞不发生移动,高温高压气体只能通过主节流短管进行降压节流作用,变成气液两相流,经出口过滤网雾化后流出低压液体出口,进入蒸发器的进口端;随着压缩机出口的排气压力和温度的逐步升高,为避免系统出现频繁停/开机现象,压缩机的排气压力保护开关和排气温度保护开关不应在启动过程中发生动作,此时应增大节流短管的流通面积使制冷剂流量加大以降低压缩机的排气压力和温度。 Since the initial boot, the high-pressure chamber P is less than the initial preload spring P1, the piston does not move, the high-temperature high-pressure gas can be throttled down by the action of the main throttle short tube, becomes a gas-liquid two phase stream, flows through the low pressure liquid outlet outlet for atomizing the filter, into the inlet end of the evaporator; gradually increased as the exhaust gas temperature and compressor outlet pressure of the system to avoid frequent stop / start phenomenon, the compressor exhaust pressure and exhaust temperature protection switch protection switch should not occur during start-up operation, the flow area of ​​the throttle at this time should be increased in the short tube to increase the flow rate of the refrigerant and reducing the temperature of the compressor discharge pressure. 此时,由于高压腔中的高压气体压力P升高到足以克服弹簧的预紧力P1,则活塞向左移动,打开辅助节流短管的部分入口通道,则高压腔中的制冷剂会同时流过主节流短管和辅助节流短管进行节流降压作用,此时的制冷剂流量将比制冷剂单独通过主节流短管要大。 At this time, since the high-pressure gas in the high pressure chamber is raised to P P1 sufficient to overcome the biasing force of the spring, the piston is moved to the left, the inlet passage portion of the auxiliary throttle open stub, the refrigerant is simultaneously in the high pressure chamber flowing through the main and auxiliary throttle orifice short stub tube throttling action of the refrigerant of the refrigerant flow rate than through the main throttle alone stub larger. 如果系统中的高压不再升高,而是维持在恒定水平,则活塞不再继续向左运动,辅助节流短管的入口打开流通横截面积将保持不变;如果系统的高压继续上升,则活塞将会继续向左运动,在这一过程中,辅助节流短管的入口流通横截面积将从零逐渐增到最大,以起到增大制冷剂流量,降低系统高压的作用。 If the high-pressure system not increase, but is maintained at a constant level, the piston moves to the left does not continue, the auxiliary inlet flow throttle opening cross sectional area of ​​the stub will remain unchanged; continue to rise if the high voltage system, the leftward movement of the piston will continue, in the process, the auxiliary throttle inlet flow cross-sectional area of ​​the short tube increases gradually from zero to a maximum, in order to play a larger refrigerant flow, reducing system pressure effect. 当辅助节流短管的入口横截面积完全打开后,活塞的进一步向左移动将不能再使流过主节流短管和辅助节流短管的制冷剂流量增大。 When the cross sectional area of ​​the auxiliary inlet stub throttle fully open, further leftward movement of the piston will no longer flow rate of the refrigerant flowing through the main and auxiliary throttle orifice stub short tube increases. 随着系统的继续运行,系统中的高压将从最高峰值慢慢降到一个恒定的水平,则活塞的受力将会比启动初始的峰值要低,活塞将在弹簧力的作用下关小辅助节流短管的入口流通面积,从而使系统的吸排气压力维持在一定的水平。 With continued operation of the system, high pressure system gradually drops from the peak value of a constant level, the force of the piston will be lower than the initial starting peak, off a small auxiliary piston under the force of the spring an inlet flow area orifice short tube, such that the suction and discharge pressure of the system is maintained at a certain level. 当系统停机时,压缩机的排气压力逐渐降低,活塞的位置将逐渐恢复到初始位置,使得辅助节流短管的入口仍旧保持关闭状态。 When the system is down, the discharge pressure of the compressor gradually decreases, the position of the piston will gradually return to the initial position, so that the auxiliary throttle inlet stub still remains closed.

本发明可以用在使用定排量压缩机或变排量压缩机的二氧化碳汽车空调系统中,使得系统的总体成本降低,而系统的性能又基本上可以满足。 The present invention may be used in a fixed displacement compressor or a variable displacement compressor is carbon dioxide automotive air conditioning system, such that the overall system cost is reduced, and the performance of the system substantially satisfy. 本发明中的节流短管具有结构简单、尺寸紧凑、成本低廉的特点。 In short tube orifice of the invention has a simple structure, compact size, and low cost.

附图说明 BRIEF DESCRIPTION

图1为本发明结构示意图具体实施方式如图1所示,本发明包括:阀体1、高压气体进口2、进口过滤网3、高压腔4、气缸5、活塞上止点6、活塞7、密封圈8、调节螺栓9、弹簧10、主节流短管11、辅助节流短管12、低压腔13、出口过滤网14、低压液体出口15,高压腔4的一端与高压气体进口2相连,在高压气体进口2的后面设有进口过滤网3,气缸5与高压腔4的另一端相连接,在气缸5中依次设有活塞7、弹簧10、调节螺栓9和密封圈8,活塞上止点6设在气缸5的顶端,两个相互平行的主节流短管11和辅助节流短管12与气缸5相互垂直设在阀体1中,主节流短管11的入口与高压腔4直接相连通,辅助节流短管12的入口设在气缸5的缸壁上,主节流短管11和辅助节流短管12的入口分别设在活塞上止点6的左右两侧,主节流短管11与辅助节流短管12的出口均与低压腔13的一端相连接,低压液 1 a schematic configuration diagram of the present invention DETAILED DESCRIPTION As shown in FIG. 1, the present invention comprises: a valve body 1, 2 a high pressure gas inlet, inlet filter 3, the high pressure chamber 4, a cylinder 5, the piston 6 dead center, the piston 7, ring 8, the adjusting bolt 9, the spring 10, the main throttle short tube 11, an auxiliary throttle short pipe 12, the low pressure chamber 13, the outlet filter 14, low-pressure liquid port 15 is connected to one end of the high-pressure chamber 4 and the high pressure gas inlet 2 , is provided behind the high pressure gas inlet 2 inlet filter 3, 5 and the other cylinder end is connected to the high pressure chamber 4, 5 are sequentially provided in the cylinder piston 7, the spring 10, the adjusting bolt 9 and the seal 8, the piston 6 is provided at the top dead center of the cylinder 5, two mutually parallel main throttle 11 and the auxiliary throttle stub short tube 12 with the cylinder 5 disposed perpendicular to each other in the valve body 1, the main throttle short inlet pipe 11 of the high-pressure chamber 4 is directly connected through the auxiliary inlet stub orifice 12 provided in the cylinder wall of the cylinder 5, the main throttle short tube 11 and the auxiliary throttle inlet pipe stub 12 are provided at right and left sides of the piston top dead point 6 , the main throttle 11 and the auxiliary throttle short outlet pipe stub 12 are with one end of the low pressure chamber 13 is connected to a low pressure liquid 出口15与低压腔13的另一端相连接,在低压液体出口15之前设有出口过滤网14,活塞7的一侧与活塞上止点6配合,活塞7的另一侧始终固定在弹簧10的一端,弹簧10的另一端限定在调节螺栓9上,调节螺栓9与气缸5的底端壁面之间采用螺纹连接,在调节螺栓9上开槽设有密封圈8。 Outlet 15 is connected to the other end of the low pressure chamber 13, an outlet filter 14 before the low-pressure liquid port 15 side of the piston 7 and the piston 6 with the top dead center, the other side of the piston 7 is always fixed in the spring 10 one end, the other end of the spring 10 is defined on the adjustment screw 9, the adjustment bolt 9 threaded connection between the cylinder bottom end wall 5, the adjusting bolt 9 is provided with a slotted ring 8.

所述的活塞上止点6为环形结构。 Top dead center of the piston 6 has an annular structure.

所述的主节流短管11和辅助节流短管12均是圆形管道。 The main throttle 11 and the auxiliary throttle stub short pipe 12 are circular duct.

所述的活塞7,其厚度大于辅助节流短管12的流通直径。 The piston 7, a thickness greater than the diameter of the auxiliary flow orifice 12 of the stub.

Claims (5)

  1. 1.一种跨临界二氧化碳制冷系统节流短管,包括:阀体(1)、高压气体进口(2)、活塞(7)、调节螺栓(9)、弹簧(10)、低压液体出口(15),其特征在于,还包括:进口过滤网(3)、高压腔(4)、气缸(5)、活塞上止点(6)、密封圈(8)、主节流短管(11)、辅助节流短管(12)、低压腔(13)、出口过滤网(14),高压腔(4)的一端与高压气体进口(2)相连,在高压气体进口(2)的后面设有进口过滤网(3),气缸(5)与高压腔(4)的另一端相连接,在气缸(5)中依次设有活塞(7)、弹簧(10)、调节螺栓(9)和密封圈(8),活塞上止点(6)设在气缸(5)的顶端,两个相互平行的主节流短管(11)和辅助节流短管(12)与气缸(5)相互垂直设在阀体(1)中,主节流短管(11)的入口与高压腔(4)直接相连通,辅助节流短管(12)的入口设在气缸(5)的缸壁上,主节流短管(11)和辅助节流短管(12)的入口分别设在活塞上止点(6)的左右两侧,主节 A transcritical carbon dioxide refrigerating systems short tube orifice, comprising: a valve body (1), high-pressure gas inlet (2), the piston (7), the adjusting bolt (9), a spring (10), a low-pressure fluid outlet (15 ), characterized in that, further comprising: a filter inlet (3), the high pressure chamber (4), the cylinder (5), the piston top dead center (6), the sealing ring (8), the main throttle short tube (11), auxiliary throttle short pipe (12), the low-pressure chamber (13), an outlet filter (14), one end connected to the high pressure chamber (4) with a high-pressure gas inlet (2), behind the high pressure gas inlet (2) is provided with an inlet filter (3), the cylinder (5) and the high pressure chamber (4) is connected to the other end, the cylinder (5) sequentially provided with a piston (7), a spring (10), adjusting screw (9) and the sealing ring ( 8), the dead center of the piston (6) is provided at the top of the cylinder (5), two mutually parallel main throttle short tube (11) and an auxiliary throttle short pipe (12) and the cylinder (5) is provided perpendicular to each other the valve body (1), the short tube of the main throttle (11) and the inlet of the high pressure chamber (4) is directly connected through the auxiliary throttle short pipe (12) provided in the cylinder wall of the inlet cylinder (5) of the main section left and right short tube inlet (11) and an auxiliary throttle short pipe (12) are provided in the top dead center of the piston (6) of the main section 短管(11)与辅助节流短管(12)的出口均与低压腔(13)的一端相连接,低压液体出口(15)与低压腔(13)的另一端相连接,在低压液体出口(15)之前设有出口过滤网(14),活塞(7)的一侧与活塞上止点(6)配合,活塞(7)的另一侧始终固定在弹簧(10)的一端,弹簧(10)的另一端限定在调节螺栓(9)上,调节螺栓(9)与气缸(5)的底端壁面之间采用螺纹连接,在调节螺栓(9)上开槽设有密封圈(8)。 Outlet stub (11) and the auxiliary throttle short pipe (12) are connected to one end of the low pressure chamber (13), the low pressure liquid outlet (15) and the low pressure chamber (13) is connected to the other end, a low pressure liquid outlet (15) before the filter is provided with an outlet (14), side of the piston (7) and the piston top dead center (6) with the other side of the piston (7) is always fixed to one end of the spring (10), the spring ( 10) defined on the other end of the adjusting bolt (9), is adjusted by a threaded connection between the bolt (9) and the cylinder (5) of the bottom wall, on the adjusting screw (9) is provided with a slotted ring (8) .
  2. 2.根据权利要求1所述的跨临界二氧化碳制冷系统节流短管,其特征是,所述的活塞上止点(6)为环形结构。 The carbon dioxide transcritical refrigeration system according to claim 1 short tube orifice, characterized in that the piston top dead center (6) has an annular structure.
  3. 3.根据权利要求1所述的跨临界二氧化碳制冷系统节流短管,其特征是,所述的主节流短管(11)是圆形管道。 The carbon dioxide transcritical refrigeration system according to claim 1 short tube orifice, characterized in that said main throttle short tube (11) is a circular duct.
  4. 4.根据权利要求1所述的跨临界二氧化碳制冷系统节流短管,其特征是,所述的辅助节流短管(12)是圆形管道。 The carbon dioxide transcritical refrigeration system according to claim 1 short tube orifice, characterized in that said auxiliary throttle short pipe (12) is a circular duct.
  5. 5.根据权利要求1所述的跨临界二氧化碳制冷系统节流短管,其特征是,所述的活塞(7),其厚度大于辅助节流短管(12)的流通直径。 The carbon dioxide transcritical refrigeration system according to claim 1 short tube orifice, characterized in that said piston (7), which is greater than the thickness of the auxiliary throttle short pipe (12) of the flow diameter.
CN 200510029500 2005-09-08 2005-09-08 Critical-cross carbon dioxide refrigerating system restriction sleeve CN1317537C (en)

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US8431954B2 (en) 2007-08-28 2013-04-30 Seoul Semiconductor Co., Ltd. Light emitting device employing non-stoichiometric tetragonal alkaline earth silicate phosphors
US8501040B2 (en) 2007-08-22 2013-08-06 Seoul Semiconductor Co., Ltd. Non-stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same
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CN100529600C (en) 2008-06-26 2009-08-19 上海交通大学 Across critical carbon dioxide automobile air conditioner system mechanical conditioning type expansion valve
CN101846201A (en) * 2010-05-21 2010-09-29 重庆长安汽车股份有限公司 Expansion valve of carbon dioxide automobile air conditioning system

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CN1580672A (en) * 2004-05-20 2005-02-16 上海交通大学 Fully mechanical throttle control mechanism for supercritical carbon dioxide refrigerating system

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US8900482B2 (en) 2004-06-10 2014-12-02 Seoul Semiconductor Co., Ltd. Light emitting device
US8883040B2 (en) 2004-06-10 2014-11-11 Seoul Semiconductor Co., Ltd. Luminescent material
US8847254B2 (en) 2005-12-15 2014-09-30 Seoul Semiconductor Co., Ltd. Light emitting device
US9312246B2 (en) 2006-03-31 2016-04-12 Seoul Semiconductor Co., Ltd. Light emitting device and lighting system having the same
US8674380B2 (en) 2006-08-29 2014-03-18 Seoul Semiconductor Co., Ltd. Light emitting device having plural light emitting diodes and plural phosphors for emitting different wavelengths of light
US8188492B2 (en) 2006-08-29 2012-05-29 Seoul Semiconductor Co., Ltd. Light emitting device having plural light emitting diodes and at least one phosphor for emitting different wavelengths of light
US8501040B2 (en) 2007-08-22 2013-08-06 Seoul Semiconductor Co., Ltd. Non-stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same
US8431954B2 (en) 2007-08-28 2013-04-30 Seoul Semiconductor Co., Ltd. Light emitting device employing non-stoichiometric tetragonal alkaline earth silicate phosphors

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