CN109751797A - Refrigeration system throttle capillary tube length determining method - Google Patents
Refrigeration system throttle capillary tube length determining method Download PDFInfo
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- CN109751797A CN109751797A CN201711065104.0A CN201711065104A CN109751797A CN 109751797 A CN109751797 A CN 109751797A CN 201711065104 A CN201711065104 A CN 201711065104A CN 109751797 A CN109751797 A CN 109751797A
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Abstract
A kind of refrigeration system throttle capillary tube length determining method starts refrigeration system, under required vapor pres- sure force value and evaporating temperature value, adjusts the refrigerant charge in hand expansion valve and refrigeration system, until the refrigeration effect of refrigeration system is optimal；The open position of fixed manual expansion valve；Hand expansion valve is taken out, hand expansion valve is installed between pressure reducing valve and the second low-pressure meter, injects gas, adjusts pressure reducing valve output pressure, the pressure value for showing the second low-pressure meter is equal to required vapor pres- sure force value, records the flow value of the display of flowmeter at this time；The throttle capillary tube longer than the length estimated is installed between pressure reducing valve and the second low-pressure meter, gas is injected, the pressure value that pressure reducing valve shows the second low-pressure meter is adjusted and is equal to required vapor pres- sure force value；The length of throttle capillary tube is constantly cut short, the flow value that observation flowmeter is shown, until the flow value that flowmeter is shown is identical as the flow value of above-mentioned record, the length of throttle capillary tube is optimum length at this time.
Description
Technical field
The present invention relates to the reducing pressure by regulating flow elements in compression-type refrigerating system, more particularly to a kind of refrigeration system throttling hair
Capillary length determines method.
Background technique
In present many small-sized compression-type refrigerating systems, reducing pressure by regulating flow device mostly uses capillary, because of capillary
It is compared to automatic expansion valve, heating power expansion valve and thermal electric expansion valve etc., structure is simpler, without moving component, does not have portion
Part abrasion and bonding, failure rate is lower, and cost is also lower.And in compressor emergency shutdown, system pressure can be balanced faster, and it is electronic
It is minimum that machine starts load.But the factors such as internal diameter, the pipe range of capillary to be considered using capillary in the design, especially substantially
After the internal diameter for calculating capillary use, the determination of the length of capillary is relatively difficult, especially good there is presently no one
Calculation method.For different refrigerants, different refrigeration systems, the optimization of capillary pipe length can only lean on test repeatedly
Finally to determine.This will waste a large amount of man power and material, such as duplicate welding and continuous charge and discharge refrigerant.
Summary of the invention
The present invention is in view of the problems of the existing technology and insufficient, and it is determining to provide a kind of refrigeration system throttle capillary tube length
Method.
The present invention is to solve above-mentioned technical problem by following technical proposals:
The present invention provides a kind of refrigeration system throttle capillary tube length determining method, it is characterized in that, use refrigeration system
System and flow testing device are realized that the refrigeration system includes compressor, condenser, device for drying and filtering, hand expansion valve, evaporation
The circuit that device is constituted, is equipped with the first low-pressure meter between the evaporator and the compressor；
The flow testing device includes the pipeline that pressure reducing valve and flowmeter are constituted, and is installed between the pressure reducing valve and the flowmeter
There is the second low-pressure meter；
Method includes the following steps:
S1, start the refrigeration system, under the conditions of required vapor pres- sure force value and evaporating temperature value, constantly regulate this manually
Refrigerant charge in expansion valve and the refrigeration system, until the refrigeration effect of the refrigeration system is optimal；
S2, when the refrigeration effect of the refrigeration system is optimal, fix the open position of the hand expansion valve；
S3, the hand expansion valve is taken out from the refrigeration system, which is installed on the flow testing device
Pressure reducing valve and the second low-pressure meter between, inject gas, the output pressure of the pressure reducing valve is adjusted, so that second low-pressure meter is shown
Pressure value be equal to the required vapor pres- sure force value in step S1, the shown flow value of the record flowmeter at this time；
S4, the hand expansion valve is removed, changes the throttle capillary tube longer than the length estimated into and is installed on the flow rate test
Between the pressure reducing valve of device and the second low-pressure meter, gas is injected, the pressure that the pressure reducing valve shows second low-pressure meter is adjusted
Value is equal to the required vapor pres- sure force value in step S1；
S5, the length for constantly cutting short the throttle capillary tube observe the flow value that the flowmeter is shown, until the flowmeter is aobvious
The flow value shown and the flow value recorded in step S3 are identical, and the length of the throttle capillary tube is optimum length at this time.
Preferably, the gas injected in step S3 and S4 is compressed nitrogen.
Preferably, first low-pressure meter shows the vapor pres- sure force value.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
The present invention can quickly, effectively, accurately determine optimal capillary pipe length.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the refrigeration system of present pre-ferred embodiments.
Fig. 2 and 3 is the structural schematic diagram of the flow testing device of present pre-ferred embodiments.
Fig. 4 is the flow chart of the refrigeration system throttle capillary tube length determining method of present pre-ferred embodiments.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present embodiment provides a kind of refrigeration system throttle capillary tube length determining methods, use refrigeration system (see Fig. 1)
It is realized with flow testing device (see Fig. 2).
As shown in Figure 1, the refrigeration system include compressor 11, condenser 12, device for drying and filtering 13, hand expansion valve 14,
The circuit that evaporator 15 is constituted, is equipped with the first low-pressure meter 16 between the evaporator 15 and the compressor 11.
As shown in Fig. 2, the flow testing device includes the pipeline that pressure reducing valve 21 and flowmeter 22 are constituted, 21 He of pressure reducing valve
Second low-pressure meter 23 is installed between the flowmeter 22, this can be installed manually between pressure reducing valve 21 and second low-pressure meter 23
Expansion valve 14 or throttle capillary tube 24.
As shown in figure 4, method includes the following steps:
Step 101 starts the refrigeration system, in required vapor pres- sure force value (pressure value shown by the first low-pressure meter) and
Under the conditions of evaporating temperature value, the refrigerant charge in the hand expansion valve and the refrigeration system is constantly regulate, until the refrigeration
The refrigeration effect of system is optimal.
Step 102, when the refrigeration effect of the refrigeration system is optimal, fix the open position of the hand expansion valve.
Step 103 takes out the hand expansion valve from the refrigeration system, which is installed on the flow rate test
(see Fig. 2) between the pressure reducing valve of device and the second low-pressure meter, compressed nitrogen is injected, the output pressure of the pressure reducing valve is adjusted, so that
The pressure value that second low-pressure meter is shown is equal to the required vapor pres- sure force value in step 101, records the institute of the flowmeter at this time
The flow value of display.
Step 104 removes the hand expansion valve, changes the throttle capillary tube longer than the length estimated into and is installed on the flow
(see Fig. 3) between the pressure reducing valve of test device and the second low-pressure meter, compressed nitrogen is injected, the pressure reducing valve is adjusted and makes this second low
The pressure value that pressure table is shown is equal to the required vapor pres- sure force value in step 101.
Step 105, the length for constantly cutting short the throttle capillary tube observe the flow value that the flowmeter is shown, until the stream
The flow value that meter is shown is identical as the flow value recorded in step 103, and the length of the throttle capillary tube is best long at this time
Degree.
By the above method, can quickly, effectively, accurately determine optimal capillary pipe length.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, many changes and modifications may be made, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (3)
1. a kind of refrigeration system throttle capillary tube length determining method, which is characterized in that it uses refrigeration system and flow rate test
Device is realized that the refrigeration system includes time of compressor, condenser, device for drying and filtering, hand expansion valve, evaporator composition
Road is equipped with the first low-pressure meter between the evaporator and the compressor；
The flow testing device includes the pipeline that pressure reducing valve and flowmeter are constituted, and the is equipped between the pressure reducing valve and the flowmeter
Two low-pressure meters；
Method includes the following steps:
S1, start the refrigeration system, under the conditions of required vapor pres- sure force value and evaporating temperature value, constantly regulate the manual expansion
Refrigerant charge in valve and the refrigeration system, until the refrigeration effect of the refrigeration system is optimal；
S2, when the refrigeration effect of the refrigeration system is optimal, fix the open position of the hand expansion valve；
S3, the hand expansion valve is taken out from the refrigeration system, which is installed on subtracting for the flow testing device
Between pressure valve and the second low-pressure meter, gas is injected, the output pressure of the pressure reducing valve is adjusted, so that the pressure that second low-pressure meter is shown
Force value is equal to the required vapor pres- sure force value in step S1, records the shown flow value of the flowmeter at this time；
S4, the hand expansion valve is removed, changes the throttle capillary tube longer than the length estimated into and is installed on the flow testing device
Pressure reducing valve and the second low-pressure meter between, inject gas, adjust the pressure value etc. that the pressure reducing valve shows second low-pressure meter
Required vapor pres- sure force value in step S1；
S5, the length for constantly cutting short the throttle capillary tube observe the flow value that the flowmeter is shown, until what the flowmeter was shown
The flow value recorded in flow value and step S3 is identical, and the length of the throttle capillary tube is optimum length at this time.
2. refrigeration system throttle capillary tube length determining method as described in claim 1, which is characterized in that in step S3 and S4
The gas of injection is compressed nitrogen.
3. refrigeration system throttle capillary tube length determining method as described in claim 1, which is characterized in that first low-pressure meter
Show the vapor pres- sure force value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711065104.0A CN109751797A (en) | 2017-11-02 | 2017-11-02 | Refrigeration system throttle capillary tube length determining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711065104.0A CN109751797A (en) | 2017-11-02 | 2017-11-02 | Refrigeration system throttle capillary tube length determining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109751797A true CN109751797A (en) | 2019-05-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711065104.0A Pending CN109751797A (en) | 2017-11-02 | 2017-11-02 | Refrigeration system throttle capillary tube length determining method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550907A (en) * | 2020-04-07 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Air conditioner debugging system and method for determining length of capillary tube |
| CN115574495A (en) * | 2022-11-18 | 2023-01-06 | 江苏拓米洛环境试验设备有限公司 | Capillary tube calibration device system and method for variable working condition and variable flow |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040021943A (en) * | 2002-09-06 | 2004-03-11 | 삼성전자주식회사 | Air conditioner |
| CN103836850A (en) * | 2012-11-20 | 2014-06-04 | 珠海格力电器股份有限公司 | Capillary tube matching tool |
| CN203744624U (en) * | 2014-02-20 | 2014-07-30 | 广东志高暖通设备股份有限公司 | Air-conditioning system for experiment and capillary tube assembly of air-conditioning system |
| CN203785344U (en) * | 2014-02-18 | 2014-08-20 | 珠海格力电器股份有限公司 | Capillary matching device |
| CN106969475A (en) * | 2017-05-08 | 2017-07-21 | 青岛海尔空调器有限总公司 | Air-conditioning system adjusting method and device |
-
2017
- 2017-11-02 CN CN201711065104.0A patent/CN109751797A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040021943A (en) * | 2002-09-06 | 2004-03-11 | 삼성전자주식회사 | Air conditioner |
| CN103836850A (en) * | 2012-11-20 | 2014-06-04 | 珠海格力电器股份有限公司 | Capillary tube matching tool |
| CN203785344U (en) * | 2014-02-18 | 2014-08-20 | 珠海格力电器股份有限公司 | Capillary matching device |
| CN203744624U (en) * | 2014-02-20 | 2014-07-30 | 广东志高暖通设备股份有限公司 | Air-conditioning system for experiment and capillary tube assembly of air-conditioning system |
| CN106969475A (en) * | 2017-05-08 | 2017-07-21 | 青岛海尔空调器有限总公司 | Air-conditioning system adjusting method and device |
Non-Patent Citations (2)
| Title |
|---|
| 冯利峰等: "毛细管气体流量特性研究", 《制冷学报》 * |
| 谢寿凤: "小型制冷***毛细管尺寸确定方法简述", 《科技创新导报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550907A (en) * | 2020-04-07 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Air conditioner debugging system and method for determining length of capillary tube |
| CN115574495A (en) * | 2022-11-18 | 2023-01-06 | 江苏拓米洛环境试验设备有限公司 | Capillary tube calibration device system and method for variable working condition and variable flow |
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