CN201964700U - Throttling device and refrigeration system provided therewith - Google Patents
Throttling device and refrigeration system provided therewith Download PDFInfo
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- CN201964700U CN201964700U CN201120033689XU CN201120033689U CN201964700U CN 201964700 U CN201964700 U CN 201964700U CN 201120033689X U CN201120033689X U CN 201120033689XU CN 201120033689 U CN201120033689 U CN 201120033689U CN 201964700 U CN201964700 U CN 201964700U
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Abstract
The utility model provides a throttling device and a refrigeration system provided therewith, wherein the throttling device comprises a throttling pipeline and a plurality of orifice plates which are sequentially arranged in the throttling pipeline, and liquid sight glass is arranged at an effluent side of each orifice plate. The throttling device can be used for observing gas-liquid state of refrigerant in the pipeline after throttling of the orifice plates through the liquid sight glass arranged at the effluent side of each orifice plate, including whether bubbles are produced, whether the density of the bubbles is reasonable, and the like, so as to very intuitively analyze whether the model selection of the orifice plates at various levels is appropriate, ensure the model selection of the multi-level orifice plates to be correct, guarantee the safe operation of the pipeline of the refrigeration system, effectively improve the design efficiency of the throttling device and the refrigeration system, and improve various performance parameters of the refrigeration system.
Description
Technical field
The utility model relates to refrigerating field, especially, relates to a kind of throttling arrangement and has the refrigeration system of this throttling arrangement.
Background technology
The throttling arrangement that is used for the heat pump refrigerating system at present mainly contains capillary, heating power expansion valve, electric expansion valve, ball float expansion valve, linear float valve, lift valve and orifice plate.Above-mentioned throttling arrangement is except that capillary, and structure is all complicated, big, the most throttling arrangement Flow-rate adjustment of manufacture difficulty difficulty is big, and capillary is mainly used in the minitype air conditioner unit, and orifice plate has been used in the heat pump refrigerating system as a kind of throttling arrangement simple in structure.Orifice plate is arranged between the condenser and evaporimeter in condenser and the evaporimeter integration system cooling system usually, promptly in condenser an orifice plate is set, and realizes the purpose of throttling step-down.Adjustable range is little, the shortcoming of adaptive capacity difference but single throttle orifice plate apparatus exists, and for overcoming this shortcoming, uses the porous plate throttling arrangement to improve adaptive capacity.
The effect of restricting orifice diminishes the aperture in the suitable place of pipeline exactly, and when the reducing of liquid process, a fluid stream can attenuate or shrink.The minimum cross section of a fluid stream appears at the downstream of actual reducing, is called vena contracta.At the vena contracta place, flow velocity is maximum, the increase of flow velocity is accompanied by the reduction greatly of vena contracta place pressure, when a fluid stream expansion enters bigger zone, speed descends, pressure increases, but downstream pressure can not return to the pressure of upstream fully, and this is because the result that big internal turbulence and energy consume.If the pressure at vena contracta place drops to below the saturated vapour pressure under the liquid corresponding temperature, steam is just arranged in a fluid stream and the gas that is dissolved in the water is overflowed, form the small bubble that steam mixes with gas, pressure is low more, and steam bubble is many more.If the pressure in orifice plate downstream still is lower than the saturated vapour pressure of liquid, steam bubble will continue at the pipeline in downstream to produce, and liquid vapour two-phase is mixed and existed, and this phenomenon is exactly flash distillation.If downstream pressure returns to the saturated vapour pressure that is higher than liquid, steam bubble condenses rapidly and breaks under the effect of high pressure, in the moment that steam bubble breaks, produce local hole, water under high pressure to the space that these former steam bubbles occupy, forms an impulsive force with high velocity flow.Because gas in the steam bubble and steam have little time all to dissolve and condense in moment, under impact force action, be divided into small bubble again, compressed, condense by water under high pressure again, so form repeatedly repeatedly, and producing a kind of noise that our conceivable sandstone flows through pipeline that is similar to, this kind phenomenon is called cavitation.The flow channel material surface forms tired and is seriously damaged under the surge pressure effect.
The system pipeline that has flass, because medium is a steam water two phase flow, medium specific volume and flow velocity are multiplied, it is quite severe to wash away surface abrasion, it shows as the profile that wash surface has smooth polishing, and can produce the following noise of 80dB, and vibration to a certain degree.And there is the system pipeline of cavitation phenomenon, then can owing to steam bubble break and high speed impact cause serious noise, pipe vibration is big, on the atomic little area of water passage surface, the pressure that impulsive force forms can even be gone up gpa up to hundreds of, frequency of impact can reach per second several ten thousand times, just may cause the badly damaged of wash surface at short notice, and it shows as wash surface can produce the thick poor surface that is similar to cinder.And, by the oxygen isoreactivity gas of overflowing in the liquid, emit heat when condensing by steam bubble, also can play the chemical attack effect to metal.
This shows no matter the refrigerant in the refrigeration system pipeline is that flass or cavitation phenomenon take place, all can cause in various degree infringement to system pipeline, all is disadvantageous to safe operation.Yet, formed throttling arrangement is a kind of more special throttling arrangement because orifice plate is connected, also there is not at present ripe design and calculation method, producer is if will adopt, still need carry out a large amount of experimental study work, calculate because the design of orifice plate relates to two phase flow, calculating can be very difficult if the size in hole relies on theory, so obtain the approximate size in hole by estimation, thereby make the actual aperture plate type selecting of using occur easily not matching.When the orifice plate type selecting does not match, cause that easily cold medium flux is too much or very few, thereby make refrigeration unit under optimum operating condition, to move, its coefficient of performance is reduced.
Therefore, be necessary to provide a kind of can utilize orifice plate to realize the throttling pressure limiting and effectively detect the flash distillation of refrigerant and cavitation phenomenon so that carry out the orifice plate type selecting fast, improve the throttling arrangement that orifice plate selects the traffic demand matching degree of type and refrigeration system.
The utility model content
The utility model purpose is to provide a kind of throttling arrangement, to solve adopting the technical problem that orifice plate type selecting cycle long, baffle system demand matching degree low of orifice plate as throttling arrangement.
In order to solve the problems of the technologies described above, according to an aspect of the present utility model, provide a kind of throttling arrangement, it comprises the throttling pipeline, is provided with a plurality of orifice plates in the throttling pipeline in turn, the side that goes out to flow of each orifice plate is provided with liquid-sighting glass.
Further, the quantity of orifice plate is at least two.
Further, the side that goes out to flow of each orifice plate all is provided with a liquid-sighting glass.
According to another aspect of the present utility model, a kind of refrigeration system also is provided, it comprises above-mentioned throttling arrangement.
Further, the refrigeration system that the utility model provides comprises condenser and evaporimeter, and the end that becomes a mandarin of the throttling pipeline in the throttling arrangement links to each other with the stream end that goes out of condenser, and the stream end that goes out of throttling pipeline links to each other with the end that becomes a mandarin of evaporimeter.
The utlity model has following beneficial effect:
The throttling arrangement that the utility model provides can be observed gas-liquid state through refrigerant in the pipeline after the orifice plate throttling by the liquid-sighting glass that is arranged on orifice plate and goes out to flow side, comprise whether have bubble to produce and bubble density whether reasonable etc., whether the type selecting that can analyze orifice plates at different levels very intuitively is suitable, guarantee that multistage orifice plate type selecting is correct, guarantee the safe operation of system pipeline, and can effectively improve the design efficiency of throttling arrangement and refrigeration system, improve the various performance parameters of refrigeration system.
Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.With reference to figure, the utility model is described in further detail below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the throttling arrangement structural representation of the utility model preferred embodiment; And
Fig. 2 is the refrigerant system configurations schematic diagram of the utility model preferred embodiment.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As shown in Figure 1, the utility model provides a kind of throttling arrangement, this throttling arrangement comprises throttling pipeline 1, in the throttling pipeline, be provided with a plurality of orifice plates in turn, the side that goes out to flow of each orifice plate is provided with liquid-sighting glass, just can observe gas-liquid state by these liquid-sighting glass, comprise whether having bubble to produce and bubble density etc. through refrigerant in the pipeline after the orifice plate throttling.
For improving throttling arrangement adaptability, adopt two and carried out throttling, in the present embodiment, preferably adopt two orifice plates of arranging in turn with last orifice plate, be that the circulating direction that 30, two orifice plate longshore currents of first order orifice plate 10 and second level orifice plate are crossed the refrigerant in the throttling pipeline 1 is provided with in turn.
In order to save cost, and simplify the structure of throttling arrangement, the going out to flow side and all a liquid-sighting glass can only be set of each orifice plate, promptly the side that goes out to flow at first order orifice plate 10 is provided with first liquid-sighting glass 20, in the side that goes out to flow of second level orifice plate 30 second liquid-sighting glass 40 is set.
In addition, as shown in Figure 2, the utility model also provides a kind of refrigeration system that comprises above-mentioned throttling arrangement, comprises condenser 50, evaporimeter 70 in this refrigeration system, and is arranged at the compressor 60 between condenser 50 and the evaporimeter 70.The end that becomes a mandarin of the throttling pipeline 1 of throttling arrangement links to each other with the stream end that goes out of condenser 50, and the stream end that goes out of throttling pipeline 1 links to each other with the end that becomes a mandarin of evaporimeter 70.
The throttling arrangement that the utility model provides can be observed the refrigerant state that flows through in the throttling pipeline 1 by the liquid-sighting glass of observing orifice plates at different levels and going out to flow side, and the selection that can very simple judgement be specially which rank of orifice plate goes wrong.In the name of refrigeration is an example, when multistage orifice plate is reasonable in design, still is that complete liquid, follow-up second level orifice plate 30 begins with the certain proportion shwoot afterwards through first order orifice plate 10 back refrigerants, and the number of bubbles between the adjacent two-stage orifice plate can be determined substantially.Yet if first order orifice plate type selecting is less than normal, refrigerant flash phenomenon will occur through behind the first order orifice plate, will produce bubble between first order orifice plate 10 and second level orifice plate 30, and then it is less than normal just can to judge the model of first order orifice plate; Correspondingly, when first order orifice plate type selecting is bigger than normal, cold medium flux is bigger than normal, not only by flash phenomenon not occurring behind the first order orifice plate 10, and the flash phenomenon of the refrigerant by the subsequent stages orifice plate is lighter, number of bubbles between the adjacent orifice plate is less, thereby the model that can simply judge first order orifice plate is bigger than normal, all can judge according to the method described above successively for the subsequent stages orifice plate in the choke manifold.Therefore, utilize whether liquid-sighting glass has produced between the adjacent orifice plate by observing whether suitable whether bubble or the bubble density type selecting that just can judge orifice plates at different levels simply suitable, whether the type selecting of orifice plate and the traffic demand of refrigeration system mate, the judgment mode simple and fast, can effectively improve the desin speed of throttling arrangement, and can better guarantee the stability of the refrigeration system operation in the refrigeration system and the reliability of performance of refrigerant systems coefficient, can reach the refrigeration system purpose of energy saving effectively.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a throttling arrangement comprises, throttling pipeline (1) is provided with a plurality of orifice plates (10,30) in turn in the described throttling pipeline, it is characterized in that, the side that goes out to flow of each described orifice plate (10,30) is provided with liquid-sighting glass (20,40).
2. throttling arrangement according to claim 1 is characterized in that, the quantity of described orifice plate (10,30) is at least two.
3. throttling arrangement according to claim 1 is characterized in that, the side that goes out to flow of each described orifice plate (10,30) all is provided with a liquid-sighting glass (20,40).
4. a refrigeration system is characterized in that, comprises each described throttling arrangement in the claim 1 to 3.
5. refrigeration system according to claim 4, comprise condenser (50) and evaporimeter (70), it is characterized in that the end that becomes a mandarin of described throttling pipeline (1) links to each other with the stream end that goes out of described condenser (50), the stream end that goes out of described throttling pipeline (1) links to each other with the end that becomes a mandarin of described evaporimeter (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120033689XU CN201964700U (en) | 2011-01-30 | 2011-01-30 | Throttling device and refrigeration system provided therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120033689XU CN201964700U (en) | 2011-01-30 | 2011-01-30 | Throttling device and refrigeration system provided therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201964700U true CN201964700U (en) | 2011-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120033689XU Expired - Lifetime CN201964700U (en) | 2011-01-30 | 2011-01-30 | Throttling device and refrigeration system provided therewith |
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| CN (1) | CN201964700U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528289A (en) * | 2012-07-03 | 2014-01-22 | 珠海格力电器股份有限公司 | Refrigerant heating device and air conditioner with same |
| CN103627459A (en) * | 2013-11-28 | 2014-03-12 | 上海交通大学 | Throttling on-line natural gas light dydrocarbon separating device |
-
2011
- 2011-01-30 CN CN201120033689XU patent/CN201964700U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528289A (en) * | 2012-07-03 | 2014-01-22 | 珠海格力电器股份有限公司 | Refrigerant heating device and air conditioner with same |
| CN103528289B (en) * | 2012-07-03 | 2016-07-13 | 珠海格力电器股份有限公司 | Coolant heater and there is its air-conditioner |
| CN103627459A (en) * | 2013-11-28 | 2014-03-12 | 上海交通大学 | Throttling on-line natural gas light dydrocarbon separating device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110907 |
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| CX01 | Expiry of patent term |