CN107449104B - Cold station testing device and cold station testing method - Google Patents
Cold station testing device and cold station testing method Download PDFInfo
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- CN107449104B CN107449104B CN201710539576.9A CN201710539576A CN107449104B CN 107449104 B CN107449104 B CN 107449104B CN 201710539576 A CN201710539576 A CN 201710539576A CN 107449104 B CN107449104 B CN 107449104B
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Abstract
The invention discloses a cold station testing device and a cold station testing method. The cold station testing device comprises a refrigerating host testing table (1), a refrigerating water connecting pipeline (2), a cooling water connecting pipeline (3), a cooling water side tool (4) and a refrigerating water side tool (5), wherein the refrigerating water side tool (5) and the refrigerating water connecting pipeline (2) are connected between the refrigerating host testing table (1) and a refrigerating water pipe of a cold station (6) to be tested, the cooling water side tool (4) and the cooling water connecting pipeline (3) are connected between the refrigerating host testing table (1) and the cooling water pipe of the cold station (6) to be tested, and a pressure gauge for detecting the outflow pressure and inflow pressure of cooling water of the cold station (6) to be tested is arranged on the cooling water side tool (4). According to the cold station testing device, the existing refrigerating host machine testing table can be quickly modified, the structure is simple, the cost is low, and the utilization rate of testing resources is high.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a cold station testing device and a cold station testing method.
Background
With the rise of cold station applications, more and more equipment manufacturers are also gradually beginning to produce cold station products. The cold station is an integrated air conditioning device comprising a refrigeration host and a pipeline conveying system, and the test content of the cold station is the same as that of the refrigeration host. For manufacturers of refrigeration hosts, there are test tables of existing refrigeration hosts, but the test tables of refrigeration hosts cannot directly test a cold station, because the test tables are the power-line-conveying-power-required users during the test of the refrigeration hosts, and the test tables are the power-line-conveying-power-supplying users during the test of the cold station. If the cold station needs to be tested, the cold station test bed can be rebuilt, so that the production cost is increased and the test resources are wasted; the inside of the existing test bench can be modified, but the inside of the existing test bench is generally complex, pipelines are complicated, and little space is available for secondary modification.
Disclosure of Invention
The embodiment of the invention provides a cold station testing device and a cold station testing method, which can quickly reform the existing host machine testing table, and has the advantages of simple structure, low cost and high utilization rate of testing resources.
To achieve the above objective, an embodiment of the present invention provides a cold station testing device, including a refrigeration host testing stand, a chilled water connection pipeline, a cooling water side tool and a chilled water side tool, wherein the chilled water side tool and the chilled water connection pipeline are connected between the refrigeration host testing stand and a chilled water pipe cold station of a cold station to be tested, the cooling water side tool and the cooling water connection pipeline are connected between the refrigeration host testing stand and a cooling water pipe of the cold station to be tested, and a pressure gauge for detecting outflow pressure and inflow pressure of cooling water of the cold station to be tested is provided on the cooling water side tool.
Preferably, the cooling water side tool is provided with a cooling water outflow section and a cooling water inflow section, and a first differential pressure bypass valve is arranged between the cooling water outflow section and the cooling water inflow section.
Preferably, a first check valve guided from the cooling water inflow section to the cooling water outflow section is further provided between the cooling water outflow section and the cooling water inflow section.
Preferably, the chilled water side tool comprises a chilled water outflow section and a chilled water inflow section, and a second one-way valve guided to the chilled water outflow section by the chilled water inflow section is arranged between the chilled water outflow section and the chilled water inflow section.
Preferably, the refrigeration host test bench comprises a test bench cooling water delivery pump, a first differential pressure transmitter, a third control valve arranged at a cooling water inlet end of the refrigeration host test bench and a fourth control valve arranged at a cooling water outlet end of the refrigeration host test bench, wherein the first differential pressure transmitter is connected between the cooling water inlet end and the cooling water outlet end of the refrigeration host test bench.
Preferably, the refrigerating host test bench comprises a test bench chilled water delivery pump, a second differential pressure transmitter, a first control valve arranged at a chilled water inlet end of the refrigerating host test bench and a second control valve arranged at a chilled water outlet end of the refrigerating host test bench, and the second differential pressure transmitter is connected between the chilled water inlet end and the chilled water outlet end of the refrigerating host test bench.
Preferably, the cold station to be tested comprises a cooling water inlet pipe and a cooling water outlet pipe, and a cold station cooling water delivery pump is arranged on the cooling water inlet pipe.
Preferably, the cold station to be tested comprises a chilled water inlet pipe and a chilled water outlet pipe, a chilled water conveying pump of the cold station is arranged on the chilled water inlet pipe, and a second differential pressure bypass valve is arranged between the chilled water inlet pipe and the chilled water outlet pipe, which are close to the chilled water side tool.
According to another aspect of the present invention, there is provided a cold station testing method, comprising: starting a cooling water control side of a refrigerating host test table; adjusting the cooling water outflow pressure and the cooling water inflow pressure of the cooling water side tool to a first preset pressure value; starting a cold station to be tested, and adjusting a refrigerating host test table and a cooling water side tool to adjust the cooling water inflow pressure to a second preset pressure value; and regulating the cold station to be tested to a rated working state, and controlling the cooling water to flow to a third preset pressure value.
Preferably, the cooling water inflow pressure is achieved by adjusting the opening degrees of the third control valve and the fourth control valve.
According to another aspect of the present invention, there is provided a cold station testing method, comprising: starting a chilled water control side of a refrigerating host test table; adjusting the outflow pressure of the chilled water and the inflow pressure of the chilled water side tool to a first preset pressure value; starting a cold station to be tested, and adjusting a refrigerating host test table and a chilled water side tool to adjust the pressure of chilled water to a second preset pressure value; and regulating the cold station to be tested to a rated working state, and controlling the flow pressure of the chilled water to a third preset pressure value.
Preferably, the chilled water inflow pressure is achieved by adjusting the opening degrees of the first control valve and the second control valve.
By applying the technical scheme of the invention, the cold station testing device comprises a refrigerating host testing table, a chilled water connecting pipeline, a cooling water side tool and a chilled water side tool, wherein the chilled water side tool and the chilled water connecting pipeline are connected between the refrigerating host testing table and a chilled water pipe of a cold station to be tested, the cooling water side tool and the cooling water connecting pipeline are connected between the refrigerating host testing table and the cooling water pipe of the cold station to be tested, and a pressure gauge for detecting the outflow pressure and inflow pressure of cooling water of the cold station to be tested is arranged on the cooling water side tool. According to the cold station testing device, on the basis of an original refrigerating host testing table, a cooling water side tool and a freezing water side tool are added between the refrigerating host testing table and a cold station to be tested, and the conveying pressure of the refrigerating host testing table is adjusted through a pressure gauge on the cooling water side tool, so that the testing of the cold station can be completed through the output kinetic energy of the refrigerating host testing table, the structure is simple, the operation is convenient, the utilization rate of testing resources is high, and the cost is low.
Drawings
FIG. 1 is a schematic diagram of the operation of a cold station testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a cooling water side tool and a chilled water side tool of a cold station testing apparatus according to an embodiment of the present invention;
FIG. 3 is a connection block diagram of a cold station testing apparatus according to an embodiment of the present invention;
fig. 4 is a flowchart of a testing method of a cold station testing apparatus according to an embodiment of the present invention.
Reference numerals illustrate: 1. a refrigerating host test board; 2. a chilled water connection line; 3. a cooling water connection line; 4. cooling water side tooling; 5. freezing a water side tool; 6. a cold station to be tested; 7. a cooling water outflow section; 8. a cooling water inflow section; 9. a first differential pressure bypass valve; 10. a first one-way valve; 11. a chilled water outflow section; 12. a chilled water inflow section; 13. a second one-way valve; 14. a test bench cooling water delivery pump; 15. a first differential pressure transmitter; 16. a third control valve; 17. a fourth control valve; 18. a test bed chilled water delivery pump; 19. a second differential pressure transmitter; 20. a first control valve; 21. a second control valve; 22. a cold station cooling water delivery pump; 23. chilled water delivery pumps for cold stations.
Detailed Description
The invention will now be described in further detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Referring to fig. 1 to 3 in combination, according to an embodiment of the present invention, a cold station testing apparatus includes a refrigerating host testing stand 1, a chilled water connection pipe 2, a cooling water connection pipe 3, a cooling water side fixture 4, and a chilled water side fixture 5, the chilled water side fixture 5 and the chilled water connection pipe 2 being connected between the refrigerating host testing stand 1 and a chilled water pipe of a cold station 6 to be tested, the cooling water side fixture 4 and the cooling water connection pipe 3 being connected between the refrigerating host testing stand 1 and a cooling water pipe of the cold station 6 to be tested, and a pressure gauge for detecting an outflow pressure and an inflow pressure of cooling water of the cold station 6 to be tested being provided on the cooling water side fixture 4.
On the basis of an original refrigerating host test bench, the cooling water side tool 4 and the freezing water side tool 5 are added between the refrigerating host test bench 1 and the to-be-tested cold station 6, and the conveying pressure of the refrigerating host test bench 1 is regulated through the pressure gauge on the cooling water side tool 4, so that the testing of the cold station can be completed through the output kinetic energy of the refrigerating host test bench 1, and the refrigerating station testing device is simple in structure, convenient to operate, high in utilization rate of testing resources and low in cost.
Preferably, the cooling water side tooling 4 is provided with a cooling water outflow section 7 and a cooling water inflow section 8, and a first differential pressure bypass valve 9 is arranged between the cooling water outflow section 7 and the cooling water inflow section 8. The first differential pressure bypass valve 9 can set the pressure difference between the cooling water outflow section 7 and the cooling water inflow section 8 so that the pressure difference between the two is always kept at a constant value, which can meet the test requirements.
Preferably, a first one-way valve 10 is also provided between the cooling water outflow section 7 and the cooling water inflow section 8, which is guided by the cooling water inflow section 8 to the cooling water outflow section 7.
Preferably, the chilled water side fixture 5 comprises a chilled water outflow section 11 and a chilled water inflow section 12, and a second check valve 13 guided to the chilled water outflow section 11 by the chilled water inflow section 12 is arranged between the chilled water outflow section 11 and the chilled water inflow section 12.
The check valve is used for preventing the water on the pipeline from flowing back; the following description will take the frozen side as an example: when the cold station water pump 23 is started, the cooling water from the cold station can be prevented from flowing from the point C to the point D, so that the cooling water circulates in the interior; it is necessary to add a check valve to prevent internal circulation.
Preferably, the refrigeration host test bench 1 comprises a test bench cooling water delivery pump 14, a first differential pressure transmitter 15, a third control valve 16 arranged at the cooling water inlet end of the refrigeration host test bench 1 and a fourth control valve 17 arranged at the cooling water outlet end of the refrigeration host test bench 1, wherein the first differential pressure transmitter 15 is connected between the cooling water inlet end and the cooling water outlet end of the refrigeration host test bench 1. The output kinetic energy of the cooling water delivery pump 14 can be controlled through the first differential pressure transmitter 15, so that the output kinetic energy of the refrigeration host test table 1 can meet the requirement, and the test precision is improved. The opening degrees of the third control valve 16 and the fourth control valve 17 are adjusted, so that the pressure difference between the cooling water inlet end and the cooling water outlet end can be conveniently adjusted, the cooling water inflow section 8 can meet the set requirement, and the effective test of the cold station 6 to be tested is realized.
Preferably, the refrigeration host test stand 1 comprises a test stand chilled water delivery pump 18, a second differential pressure transmitter 19, and a first control valve 20 arranged at the chilled water inlet end of the refrigeration host test stand 1 and a second control valve 21 arranged at the chilled water outlet end of the refrigeration host test stand 1, wherein the second differential pressure transmitter 19 is connected between the chilled water inlet end and the chilled water outlet end of the refrigeration host test stand 1. The second differential pressure transmitter 19 can detect the differential pressure between the chilled water inlet end and the chilled water outlet end of the chilled water main test stand 1, so as to adjust the output kinetic energy of the chilled water side of the chilled water main test stand 1 according to the detected value, so that the output kinetic energy meets the test requirement.
Preferably, the cold station 6 to be measured comprises a cooling water inlet pipe and a cooling water outlet pipe, and the cooling water inlet pipe is provided with a cold station cooling water delivery pump 22. The cold station cooling water delivery pump 22 can provide kinetic energy for the operation of the cold station 6 to be tested to perform a test of the cold station 6 to be tested in a rated operating state.
Preferably, the cold station 6 to be tested comprises a chilled water inlet pipe and a chilled water outlet pipe, a cold station chilled water delivery pump 23 is arranged on the chilled water inlet pipe, and a second differential pressure bypass valve is arranged between the chilled water inlet pipe and the chilled water outlet pipe which are close to the chilled water side tool 5. By the second differential pressure bypass valve, the pressure difference between the chilled water inlet pipe and the chilled water outlet pipe can be always kept at a constant value, so that the test requirement of the chilled water side is met.
Referring to fig. 4 in combination, according to an embodiment of the present invention, a cold station testing method includes: starting a cooling water control side of the refrigerating host test table 1; adjusting the outflow pressure of cooling water and the inflow pressure of the cooling water side tool 4 to a first preset pressure value; starting a cold station 6 to be tested, and adjusting the refrigerating host test table 1 and the cooling water side tool 4 to adjust the cooling water inflow pressure to a second preset pressure value; and (3) regulating the cold station 6 to be tested to a rated working state, and controlling the cooling water inflow pressure to a third preset pressure value.
Preferably, the cooling water inflow pressure is achieved by adjusting the opening degrees of the third control valve 16 and the fourth control valve 17.
According to an embodiment of the invention, a cold station testing method includes: starting a chilled water control side of the refrigerating host test table 1; adjusting the outflow pressure of the chilled water and the inflow pressure of the chilled water side tool 5 to a first preset pressure value; starting a cold station 6 to be tested, and adjusting the refrigerating host test table 1 and the chilled water side tool 5 to adjust the pressure of chilled water to a second preset pressure value; and (3) regulating the cold station 6 to be tested to a rated working state, and controlling the flow pressure of the chilled water to a third preset pressure value.
Preferably, the chilled water inflow pressure is achieved by adjusting the opening degrees of the first control valve 20 and the second control valve 21.
The working procedure of the cold station testing device according to the embodiment of the invention is described below:
in this embodiment, the cold station to be tested requires a refrigerating side output lift of 30m (i.e., P CD =30m), the cooling side output head is 15m (i.e. P GH =15m), taking this as an example to describe a detailed test partyThe method comprises the following steps:
for the cooling side water system, first, before the cold station 6 to be tested is opened, the first control valve 20, the second control valve 21, the third control valve 16 and the fourth control valve 17 are all controlled to be kept closed, and the differential pressure value of the first differential pressure bypass valve 9 is set to be 15m water column height.
Opening the third control valve 16, controlling the opening of the third control valve 16 to 5%, slowly opening the fourth control valve 17, synchronously adjusting the third control valve 16, and maintaining the pressure difference P between the node E and the node F EF <10m, pressure value P of node H H >20m, thereby preventing negative pressure from sucking air when the cold station cooling water delivery pump 22 is started, and improving the stability of cold station test.
The cold station cooling water delivery pump 22 is then turned on to a minimum frequency, typically 25Hz, while adjusting the third control valve 16 and the fourth control valve 17 to maintain P EF ＜15m，P H ＞15m。
The cooling station cooling water delivery pump 22 is controlled to continue to load so that its operating frequency increases to the nominal frequency (e.g., 50 Hz), and then the third control valve 16 and the fourth control valve 17 are adjusted so that P H And maintaining the temperature between 15m and 20m, and completing the opening of the cooling side water system.
For the frozen water measuring system, first, the first control valve 20 is opened, the opening of the first control valve 20 is controlled to 5%, then the second control valve 21 is slowly opened, the first control valve 20 is synchronously regulated, and the pressure difference P between the node A and the node B is maintained AB <10m, pressure value P of node D D >20m, thereby preventing negative pressure from sucking air when the cold station chilled water conveying pump 23 is started, and improving the stability of cold station test.
The chilled water feed pump 23 is then turned on to a minimum frequency, typically 25Hz, while the first control valve 20 and the second control valve 21 are adjusted to maintain P AB ＜15m，P D ＞15m。
Then the chilled water delivery pump 23 of the refrigeration station is controlled to continue loading, and the opening degree of the second differential pressure bypass valve is adjusted at the same time, so that the differential pressure value P between the node C and the node D CD >30m。
Control refrigerating stationThe cooling water feed pump 22 is continuously loaded so that its operating frequency is increased to a rated frequency (for example, 50 Hz), and then the first control valve 20 and the second control valve 21 are adjusted so that P D And maintaining the temperature between 15m and 20m, and completing the opening of the refrigeration side water system.
Of course, the above is a preferred embodiment of the present invention. It should be noted that it will be apparent to those skilled in the art that several modifications and adaptations can be made without departing from the general principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (12)
1. The utility model provides a cold station testing arrangement, its characterized in that, including refrigeration host computer testboard (1), chilled water connecting line (2), cooling water connecting line (3), cooling water side frock (4) and chilled water side frock (5), chilled water side frock (5) with chilled water connecting line (2) connect between the chilled water pipe of refrigeration host computer testboard (1) and cold station (6) that awaits measuring, cooling water side frock (4) with cooling water connecting line (3) connect between the cooling water pipe of refrigeration host computer testboard (1) and cold station (6) that awaits measuring, be provided with the manometer that detects the cooling water outflow pressure and the inflow pressure of cold station (6) that awaits measuring on cooling water side frock (4).
2. Cold station testing device according to claim 1, characterized in that the cooling water side fixture (4) has a cooling water outflow section (7) and a cooling water inflow section (8), a first differential pressure bypass valve (9) being arranged between the cooling water outflow section (7) and the cooling water inflow section (8).
3. Cold station testing device according to claim 2, characterized in that a first non-return valve (10) leading from the cooling water inflow section (8) to the cooling water outflow section (7) is also arranged between the cooling water outflow section (7) and the cooling water inflow section (8).
4. Cold station testing device according to claim 1, characterized in that the chilled water side fixture (5) comprises a chilled water outflow section (11) and a chilled water inflow section (12), a second one-way valve (13) being arranged between the chilled water outflow section (11) and the chilled water inflow section (12) and being guided by the chilled water inflow section (12) to the chilled water outflow section (11).
5. Cold station testing device according to claim 1, characterized in that the refrigeration host testing station (1) comprises a testing station cooling water delivery pump (14), a first differential pressure transmitter (15), a third control valve (16) arranged at the cooling water inlet end of the refrigeration host testing station (1) and a fourth control valve (17) arranged at the cooling water outlet end of the refrigeration host testing station (1), wherein the first differential pressure transmitter (15) is connected between the cooling water inlet end and the cooling water outlet end of the refrigeration host testing station (1).
6. Cold station testing device according to claim 1, characterized in that the refrigeration host testing station (1) comprises a testing station chilled water delivery pump (18), a second differential pressure transmitter (19), and a first control valve (20) arranged at the chilled water inlet end of the refrigeration host testing station (1) and a second control valve (21) arranged at the chilled water outlet end of the refrigeration host testing station (1), the second differential pressure transmitter (19) being connected between the chilled water inlet end and the chilled water outlet end of the refrigeration host testing station (1).
7. Cold station testing device according to claim 1, characterized in that the cold station (6) to be tested comprises a cooling water inlet pipe and a cooling water outlet pipe, the cooling water inlet pipe being provided with a cold station cooling water delivery pump (22).
8. Cold station testing device according to claim 1, characterized in that the cold station (6) to be tested comprises a chilled water inlet pipe and a chilled water outlet pipe, a cold station chilled water delivery pump (23) is arranged on the chilled water inlet pipe, and a second differential pressure bypass valve is arranged between the chilled water inlet pipe and the chilled water outlet pipe close to the chilled water side fixture (5).
9. A cold station testing method, comprising:
starting a cooling water control side of a refrigerating host test table (1);
adjusting the outflow pressure of cooling water and the inflow pressure of the cooling water side tool (4) to a first preset pressure value;
starting a cold station (6) to be tested, and adjusting a refrigerating host test table (1) and a cooling water side tool (4) to adjust the pressure of cooling water to a second preset pressure value;
and (3) regulating the cold station (6) to be tested to a rated working state, and controlling the cooling water inflow pressure to a third preset pressure value.
10. Cold station testing method according to claim 9, characterized in that the cooling water inflow pressure is achieved by adjusting the opening of the third control valve (16) and the fourth control valve (17).
11. A cold station testing method, comprising:
starting a chilled water control side of a refrigerating host test table (1);
adjusting the outflow pressure of the chilled water and the inflow pressure of the chilled water side tool (5) to a first preset pressure value;
starting a cold station (6) to be detected, and adjusting a refrigerating host test table (1) and a chilled water side tool (5) to adjust the pressure of chilled water to a second preset pressure value;
and (3) regulating the cold station (6) to be tested to a rated working state, and controlling the flow pressure of the chilled water to a third preset pressure value.
12. Cold station testing method according to claim 11, characterized in that the chilled water inflow pressure is achieved by adjusting the opening of the first control valve (20) and the second control valve (21).
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| CN201710539576.9A CN107449104B (en) | 2017-07-04 | 2017-07-04 | Cold station testing device and cold station testing method |
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| CN201710539576.9A CN107449104B (en) | 2017-07-04 | 2017-07-04 | Cold station testing device and cold station testing method |
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| CN107449104A CN107449104A (en) | 2017-12-08 |
| CN107449104B true CN107449104B (en) | 2023-07-04 |
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| CN205980187U (en) * | 2016-08-02 | 2017-02-22 | 上海冰核时代科技中心（有限合伙） | Intelligent optimization control system at cold station of data center |
| CN106500280A (en) * | 2016-12-28 | 2017-03-15 | 珠海格力电器股份有限公司 | A kind of control system and control method at the cold station of central air-conditioning |
| CN207006477U (en) * | 2017-07-04 | 2018-02-13 | 珠海格力电器股份有限公司 | Cold station test device |
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2017
- 2017-07-04 CN CN201710539576.9A patent/CN107449104B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0814607A (en) * | 1994-06-30 | 1996-01-19 | Miura Co Ltd | Chilled water circulating method and system for cooler |
| CN2331900Y (en) * | 1998-08-05 | 1999-08-04 | 广州新菱冷气集团有限公司 | Variable frequency energy-saving controller for water pump of air conditioner |
| CN201381979Y (en) * | 2009-03-23 | 2010-01-13 | 深圳先进技术研究院 | Performance test system of refrigeration compressor |
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| CN103645207A (en) * | 2013-11-25 | 2014-03-19 | 乐金空调(山东)有限公司 | Heat exchange performance testing device for heat exchange tubes |
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| CN205980187U (en) * | 2016-08-02 | 2017-02-22 | 上海冰核时代科技中心（有限合伙） | Intelligent optimization control system at cold station of data center |
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| CN207006477U (en) * | 2017-07-04 | 2018-02-13 | 珠海格力电器股份有限公司 | Cold station test device |
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| CN107449104A (en) | 2017-12-08 |
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