GB/T 10079-2018 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 10079-2018 | English | 260 |
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Single-stage reciprocating refrigerant compressor (unit)
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| GB/T 10079-2001 | English | 599 |
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Single stage reciprocating refrigerant compressors
| Obsolete |
| GB/T 10079-1988 | English | RFQ |
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Enclosed single-stage reciprocating refrigerant compressors
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GB/T 10079-2018: Single-stage reciprocating refrigerant compressor (unit)---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT10079-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.200
J 73
Replacing GB/T 10079-2001
Single-stage reciprocating refrigerant compressor (unit)
ISSUED ON: DECEMBER 28, 2018
IMPLEMENTED ON: JULY 01, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Basic parameters ... 7
5 Technical requirements ... 8
6 Test methods ... 11
7 Inspection rules ... 17
8 Marks, packaging, transportation and storage ... 19
Annex A (normative) Test method for oil consumption ... 22
Annex B (normative) Test method for mechanical strength ... 23
Single-stage reciprocating refrigerant compressor (unit)
1 Scope
This Standard specifies the terms and definitions, basic parameters, technical
requirements, test methods, inspection rules and marks, packaging, transportation and
storage FOR single-stage reciprocating refrigerant compressor (hereinafter referred to
as "compressor") AND single-stage reciprocating refrigerant compressor unit
(hereinafter referred to as "compressor unit").
This Standard applies to single-stage reciprocating refrigerant compressor and single-
stage reciprocating refrigerant compressor unit.
This Standard does not apply to the compressor (unit) that uses R744 as refrigerant and
the compressor (unit) in the following products:
- household refrigerators and household freezers;
- refrigeration and air-conditioning equipment for transportation and special purpose.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 191, Packaging and storage marks
GB 4706.17, Safety of household and similar electrical appliances - Particular
requirements for motor-compressors
GB 4706.32-2012, Household and similar electrical appliances - Safety - Particular
requirements for heat pumps, air-conditioners and dehumidifiers
GB/T 5773, The method of performance test for positive displacement refrigerant
compressors
GB/T 6388, Transport package shipping mark
GB/T 9237, Refrigerating systems and heat pumps - Safety and environmental
requirements
GB/T 13306, Plates
GB/T 19410-2008, Screw refrigerant compressors
GB/T 34619, Test method for volume flow of positive displacement refrigerant
compressors
JB/T 4330-1999, Determination of noise emitted by refrigerating and air
conditioning equipment
JB/T 5446-1999, Reciprocating single-machine double-stage refrigerating
compressor
JB/T 7249, Refrigeration and air-conditioning equipment - Terminology
JB/T 9058, Measuring method of refrigerating equipment cleanliness
JB/T 10597-2006, Three phase asynchronous motors for hermetic refrigeration
compressors - General specifications
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 5773 and
JB/T 7249 as well as the followings apply.
3.1 open-type single-stage reciprocating refrigerant compressor
A single-stage refrigerant compressor that relies on a prime mover to drive a shaft
protruding from the housing or other moving parts.
NOTE: Hereinafter referred to as "open-type compressor".
3.2 semi-hermetic single-stage reciprocating refrigerant compressor
A single-stage reciprocating refrigerant compressor in which the compressor and motor
are housed in a field disassembled housing.
NOTE: Hereinafter referred to as "semi-hermetic compressor".
3.3 hermetic single-stage reciprocating refrigerant compressor
A single-stage reciprocating refrigerant compressor in which the compressor and motor
are housed in a welded or brazed housing.
NOTE: Hereinafter referred to as "hermetic compressor".
3.4 single-stage reciprocating refrigerant compressor unit
A unit that is assembled by a single-stage reciprocating refrigerant compressor, and/or
prime mover and other accessories (such as an oil pump, oil cooler, oil separator, etc.)
5 Technical requirements
5.1 General requirements
5.1.1 The compressor (unit) shall be manufactured in accordance with the provisions of
this Standard as well as the drawings and technical documents approved by the
prescribed procedures (or the agreement between the user and the manufacturer).
5.1.2 For the compressor (unit) with safety valve, the valve action shall be sensitive,
air-tight, safe and reliable.
5.1.3 The compressor (unit) lubrication system shall meet the following requirements:
- When the ambient temperature is as high as 43°C or the cooling water temperature
is 33°C, the temperature of the refrigerating machine oil in the crankcase of the
semi-hermetic compressor (unit) shall not be higher than 80°C. For the open-type
compressor (unit), it shall not be higher than 70°C.
- For compressors (units) using a pressure lubrication system, the difference between
the oil pressure of the lubrication system and the pressure of the refrigerant in the
compressor crankcase shall ensure that the compressor (unit) works normally and
reliably when the oil circuit is not blocked. Compressors (units) using splash
lubrication shall ensure that the lubrication system can work reliably when the
motor is running forward or reverse (when reverse rotation is allowed).
- The oil leakage at the shaft seal of the open-type compressor (unit) shall not exceed
0.5 mL/h.
5.1.4 The outer surface of the compressor (unit) shall be clean. The paint layer shall
adhere firmly. There shall be no defects affecting the appearance quality.
5.2 Safety requirements
The safety requirements for the compressor (unit) shall comply with the provisions of
GB/T 9237 and GB 4706.17.
5.3 Performance requirements
5.3.1 Air tightness
The airtightness of the compressor (unit) shall meet the following requirements:
- When the leak detection medium is dry, clean air or nitrogen, there shall be no
leakage at all parts of the compressor (unit) or its housing and other pressure parts.
- When the leak detection medium is helium, there shall be no leakage when the
pressure parts such as the compressor (unit) or its housing are tested with a
6.1.3 The instruments and meters used for the test shall pass the inspection by the legal
metrology inspection department and be within the validity period.
6.1.4 In addition to the test instruments and meters specified in this document, the type
and accuracy requirements of relevant test instruments and meters are as follows:
- The type and accuracy requirements of pressure, temperature, flow, and electrical
measuring instruments shall comply with the provisions of GB/T 5773.
- The type and accuracy of noise measuring instruments shall comply with the
provisions of JB/T 4330.
- The type and accuracy of vibration measuring instruments shall comply with the
provisions of GB/T 19410-2008.
6.2 Content of test method
6.2.1 Air tightness test
The method for air tightness test shall be in accordance with the provisions in Annex A
of GB/T 19410-2008.
6.2.2 Volume flow test
The method of volume flow test shall be in accordance with the provisions of GB/T
34619.
6.2.3 Cooling (heating) capacity, input power and performance coefficient tests
Under the nominal operating conditions and nominal speed specified in 4.2 (applicable
to open-type compressors), conduct the test according to the method specified in GB/T
5773.
6.2.4 Internal impurity content test
6.2.4.1 Test instruments and meters
Test instruments include:
- Balance with a sensitivity of 0.1 mg.
- 400-mesh filter screen (open-type) or filter paper with a porosity of 5 μm (hermetic,
semi-hermetic).
6.2.4.2 Test procedure
6.2.4.2.1 For hermetic compressors:
a) Take a filter paper with a porosity of 5 μm. Put it in an oven. Heat to 60℃~70℃.
The compressor (unit) is connected to the pipeline as shown in Figure 3. Open the
pressure equalizing valve and shut-off valve first. After evacuating it, fill it with an
appropriate amount of refrigerant. Close the pressure equalizing valve. Start and run
the compressor (unit). Adjust the opening of the shut-off valve. Make the exhaust
pressure and suction pressure stable at the nominal operating conditions specified in
Table 2 or Table 3. Then shut down. The preparation before test shall be ended.
During the test, the compressor (unit) shall work to meet or exceed the test pressure
ratio under the nominal operating condition. Before the compressor (unit) is restarted,
the pressure in the system shall be balanced. The pressure shall remain stable. When it
is found that the balance pressure drops, the refrigerant shall be replenished in time.
The compressor (unit) is allowed to use external forced cooling during the test. The test
has been continuously. The number of on-off times of high-temperature compressors
(units) shall not be less than 6×104 times. The number of on-off times of medium-
temperature and low-temperature compressors (units) shall not be less than 12×104
times.
6.2.11 Mechanical strength test
The methods of pneumatic test and hydraulic test shall be in accordance with the
provisions in Annex B.
6.2.12 Accelerated life test
6.2.12.1 Connect the compressor (unit) that has completed the tests of 6.2.3 and 6.2.6
into the test system. Operate according to the maximum load condition and maximum
pressure difference condition specified in Table 9 and Table 10. The running time is
1000 h for hermetic and semi-hermetic types (500 h for each operating condition). The
running time is 500 h for open-type (250 h for each operating condition).
6.2.12.2 Within the specified time, it is allowed to stop halfway to check the operation
of the machine. In case of damage to the main parts and need to be replaced, the tests
that have been carried out are invalid. After measures are taken, the test shall be carried
out again according to the test conditions specified in Table 9 and Table 10.
6.2.12.3 After the test, re-conduct the tests of 6.2.3 and 6.2.6.
- Test conclusion;
- Inspector's signature and inspection date.
b) The content of the product instruction manual includes:
- Product model and name, applicable scope, executive standard number;
- Specifications and main technical parameters [nominal cooling (heating)
capacity, input power, coefficient of performance, operating current, nominal
noise value, nominal vibration value and other items and test conditions];
- Structural diagram, installation instructions and requirements of the product;
- Accessories catalog;
- Instructions for use, maintenance and care;
- Installation, repair and maintenance of compressors (units) using flammable
refrigerants shall comply with the requirements of Annex DD in GB 4706.32-
2012 and the requirements in GB/T 9237.
8.2.3 The packing box of the compressor (unit) shall have the following signs:
- Name of the delivery station or the manufacturer;
- Name of the arrival station or receiver;
- Product model and name;
- "Handle with care", "upward" and stacking layers and other related packaging,
storage and transportation signs. The packaging signs shall comply with the
relevant provisions of GB/T 6388 and GB/T 191.
8.3 Transportation and storage
8.3.1 The compressor (unit) shall not be bumped, tilted, or exposed to rain and snow
during transportation and storage.
8.3.2 The packaged compressor (unit) shall be stored in a dry and ventilated place.
Annex A
(normative)
Test method for oil consumption
A.1 Scope of application
This method is applicable to the determination of oil consumption of compressors (units)
using R717.
A.2 General requirements
A.2.1 In order to avoid the impact of the test system on the oil consumption, the oil
accumulated in the oil separator, regulating valve, buffer, etc. shall be carefully
removed before the test starts. The oil return valve of the oil separator shall be closed
during the test.
A.2.2 During the test, the compressor (unit) shall be strictly prevented from inhaling
gas with liquid, which will affect the accuracy of the test results.
A.3 Test steps
A.3.1 First add the refrigerating machine oil of the specified designation into the
crankcase. Make the oil level reach the specified height. Start the compressor (unit)
according to the program. Run for 4 h under nominal operating conditions. When the
suction pressure is 0.1 MPa, stop the machine and drain the oil until the oil drain reaches
the point of dripping oil. Then refill the crankcase with oil and record the mass of oil
added.
A.3.2 Restart the compressor (unit). Make the compressor (unit) run continuously for
20 h under the nominal operating conditions. Shut down and drain oil when the suction
pressure is 0.1 MPa. Weigh the mass of the released oil.
A.4 Test results
The difference between the two weighed oil mass is the total oil consumption in 20 h.
From this, the oil consumption per hour can be calculated.
Annex B
(normative)
Test method for mechanical strength
B.1 Test pressure requirements
B.1.1 Test with air pressure. The test pressures on the high pressure side and low
pressure side are 1.25 times the design pressure, respectively.
B.1.2 Test with hydraulic pressure. The test pressures on the high pressure side and low
pressure side are 1.5 times the design pressure, respectively.
B.1.3 If the high pressure side and the low pressure side cannot be separated during the
test, the test pressure shall be 1.25 times (pneumatic test) or 1.5 times (hydraulic test)
of the design pressure of the high pressure side.
B.2 Air pressure test
B.2.1 Air pressure test shall have safety measures.
B.2.2 The medium for air pressure test shall be dry, clean air, nitrogen or other inert
gases. Oxygen and other dangerous gases are strictly prohibited.
B.2.3 Pressure shall be increased slowly during the air pressure test. When the air
pressure rises to 10% of the test pressure, the holding time shall not be less than 2 min.
Then do the initial inspection. The compressor housing shall be leak-free. If there is a
leak, retest after repairing. After passing the initial inspection, continue to increase the
pressure slowly to 50% of the specified test pressure. Then increase to the specified test
pressure according to the step difference of 10% of the specified test pressure for each
level. The pressure holding time is not less than 1 min. The compressor housing shall
have no abnormal deformation. Then reduce the pressure to the design pressure. Keep
the pressure for not less than 1 min. Check the compressor housing for leaks. If there is
leakage, it shall be repaired and then re-tested according to the above regulations.
B.3 Hydraulic test
B.3.1 The hydraulic test medium is a clean inert liquid (generally water) at a
temperature not lower than 5°C.
B.3.2 After filling the housing of the compressor under test with liquid and discharging
the air, slowly increase the pressure to the test pressure. The pressure holding time is
not less than 5 min. Then check. There shall be no leakage or abnormal deformation.
B.3.3 After passing the test, the water stains in the compressor housing shall be removed
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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