Compresseurs Embraco, ,EMU70HLC , R134a, 220 V, 50Hz, 1/5 HP, 149 watts , 180 mL

written by Lilianne | 26 April 2020

Embraco / Embraco piston compression EMU70HLC detailed parameters:

Refrigerant:	R-134a	Exhaust volume (cm³):	5.96
Voltage:	220 V 50Hz 1 ~	Lubricating oil category:	ISO10
Frequency (Hz):	50	Lubricating oil amount (ml):	180
application:	LBP	motor model:	RSCR
horsepower:	1/5	Starting torque:	LST
efficiency:	1.40	Test type:	ASHRAE32
Cooling capacity:	165

ID: 513306157

Appearance

	shape	Material	Dimensions (mm)
Inhalation interface	Slanted 42? Up + 45 ° to Back	Copper	6.50
Exhaust interface	Slanted parallet BP + 24 ° to Back	Copper	4.94
Process interface	Slanted 45 ° up + 45 ° to Back	Copper	6.50

Oil cooler:
Anchor plate:	European Standard EUEM
bracket:	No
Weight (kg):	8.11

application

Maximum ambient temperature (° C):	43
Expansion device:	Capillary
cool down:	Direct cooling
Air flow rate:

Mechanical data

Bill of materials:	513306157
Starting torque:	Low starting torque
Bore (mm):	22.50
Stroke (mm):	7.50
Weight (kg):	8.11

digital data

motor model:	RSCR
Wire group resistance (25 ° C)-start (25 ° C)-start:	14.95
Wire group resistance (26 ° C)-operation (25 ° C)-operation:	17.98

Checkpoint-Condensation temperature 54.4 ° C

Evaporation temperature	Cooling capacity +/- 5%			Energy consumption +/- 5%	Now energy efficiency +/- 5%	Energy efficiency +/- 7%
° C	(kcal / h)	(W)	(Btu / h)	(W)	(A)	(kcal / Wh)	(W / W)	(Btu / Wh)
-23.3	142	165	563	118	0.69	1.21	1.40	4.79

Condensation temperature 35 ° C

Evaporation temperature	Cooling capacity +/- 5%			Energy consumption +/- 5%	Now energy efficiency +/- 5%	Gas flow rate +/- 5%	Energy efficiency +/- 7%
° C	(kcal / h)	(W)	(Btu / h)	(W)	(A)	(kg / h)	(kcal / Wh)	(W / W)	(Btu / Wh)
-35	77	89	304	83	0.57	1.72	0.93	1.08	3.68
-30	115	133	455	97	0.62	2.58	1.18	1.37	4.67
-25	157	182	622	111	0.67	3.53	1.42	1.65	5.62
-20	203	236	804	123	0.70	4.57	1.65	1.92	6.56
-15	252	293	1.000	133	0.73	5.71	1.89	2.20	7.52
-10	305	354	1.210	142	0.75	6.93	2.14	2.49	8.50

Condensation temperature 45 ° C

Evaporation temperature	Cooling capacity +/- 5%			Energy consumption +/- 5%	Now energy efficiency +/- 5%	Gas flow rate +/- 5%	Energy efficiency +/- 7%
° C	(kcal / h)	(W)	(Btu / h)	(W)	(A)	(kg / h)	(kcal / Wh)	(W / W)	(Btu / Wh)
-35	63	74	252	82	0.57	1.42	0.77	0.90	3.06
-30	101	117	399	98	0.62	2.26	1.03	1.20	4.08
-25	144	168	573	113	0.67	3.26	1.28	1.49	5.08
-20	195	227	773	128	0.72	4.40	1.52	1.77	6.05
-15	251	292	998	143	0.77	5.70	1.76	2.05	7.00
-10	314	365	1.247	158	0.82	7.14	1.99	2.32	7.91

Condensation temperature 55 ° C

Evaporation temperature	Cooling capacity +/- 5%			Energy consumption +/- 5%	Now energy efficiency +/- 5%	Gas flow rate +/- 5%	Energy efficiency +/- 7%
° C	(kcal / h)	(W)	(Btu / h)	(W)	(A)	(kg / h)	(kcal / Wh)	(W / W)	(Btu / Wh)
-35	55	64	217	80	0.57	1.23	0.68	0.79	2.71
-30	85	99	337	96	0.62	1.91	0.89	1.03	3.53
-25	125	145	495	112	0.67	2.81	1.12	1.30	4.43
-20	174	202	690	129	0.72	3.93	1.35	1.56	5.34
-15	232	270	920	148	0.79	5.25	1.57	1.83	6.23
-10	299	347	1.185	168	0.86	6.79	1.78	2.07	7.07

Cooling capacity (W)

Condensing temperature 45 ° C 　　Condensing temperature 55 ° C 　　Condensing temperature 65 ° C

Energy consumption (W)

Condensing temperature 45 ° C 　　Condensing temperature 55 ° C 　　Condensing temperature 65 ° C

Energy efficiency now (A)

Condensing temperature 45 ° C 　　Condensing temperature 55 ° C 　　Condensing temperature 65 ° C

Gas flow rate (kg / h)

Condensing temperature 45 ° C 　　Condensing temperature 55 ° C 　　Condensing temperature 65 ° C

Rubber pad

Engineering code:	13146411
Dimensions:	mm (Inch)

The grommets are made of special rubber and used in the nut and bolt type or in the snap on type assembly. The rummer grommet. The dimensions of which are shown in the figure below. Was developed for installation in compressors with 16 and 19 mm diameters holes in the base plate.

Embraco / Embraco piston compression product list:

Embraco History

Embraco is an expert and leader in refrigeration solutions for the light commercial sector. The solutions we provide for the light business field can ensure a high degree of reliability of products while saving energy, thereby providing a higher quality of life.

Technology leadership, operational excellence and sustainability are the strategic pillars that ensure Embraco surpasses other companies in the global market. Embraco has developed the Fullmotion all-drive frequency conversion technology, which can release different cooling capacity according to the load to achieve up to 40% energy saving.

The global annual output exceeds 38 million, and the solutions provided by the company are known for their innovation and low energy consumption. They have always led the market trend and supported the company’s continuous innovation and development. Embraco employs nearly 12,000 people in factories and offices in Brazil (headquarters), China, Italy, Slovakia, Mexico, the United States, and Russia.

Embraco data

-Embraco can produce more than 37 million compressors per year. As of 2010, the Brazil plant alone had produced more than 300 million compressors.

-During its 40 years of operation, Embraco products are sold to more than 80 countries and regions around the world.

-Embraco employs approximately 12,000 employees in six countries (Brazil, China, Italy, Slovakia, United States, Mexico and Russia).

-Embraco has obtained a total of 1277 patents.

-A team of more than 500 engineers and technicians dedicated to providing solutions to the world’s leading manufacturers of household and commercial refrigeration equipment.

-Embraco is one of the companies that has obtained multiple patents from Brazil’s National Institute of Industrial Property (INPI) in recent years.

High energy efficiency

Energy efficiency is the basis for the development of all Embraco products. This means developing and producing compressors with lower energy consumption and less raw materials, while maintaining the benchmark quality of the products. Therefore, we continue to invest in research and development to create more efficient and quieter products that are harmless to the environment. As a result of our efforts to improve the energy efficiency of our products, and in order to exceed the highest expectations of our customers, we have developed Embraco all-wheel drive compressors, a type that can change the cooling capacity according to the speed of rotation, which can reduce energy consumption by 40%.

We have a full range of products that can provide compressors with different levels of energy efficiency. The solutions we provide are a global benchmark in meeting the most stringent international energy consumption standards. Pursuing continuous improvement of products and processes is a commitment, and each generation of Embraco compressors will be more efficient than previous products.

Green solution

Embraco has always been committed to providing the market with green solutions that subvert the traditional. We are already ahead of the industry, for example, providing advanced products that use environmentally friendly refrigerants. We have been manufacturing compressors using natural refrigerants R290 and R600a for more than 20 years. These natural refrigerants are very ideal refrigerants, which will not damage the ozone layer and will not produce a greenhouse effect. In addition, it has the advantages of low noise, high energy efficiency, and large cooling capacity, which can meet the most stringent environmental requirements.

Compresseurs Embraco, ,EMU70HLC , R134a, 220 V, 50Hz, 1/5 HP, 149 watts , 0.17 kW (0.2214 BHP) ,180 mL

PREFIXES , CONVERSION ,FACTORS

written by Lilianne | 26 April 2020

Prefixes

Units can be used as such or in multiples or fractions of ten:

PREFIX		POWER OF TEN
T	tera	10¹²
G	giga	10⁹
M	mega	10⁶
k	kilo	10³
h	hecto	10²
da	deca	10¹
d	deci	10^-1
c	centi	10^-2
m	milli	10^-3
m	micro	10^-6
n	nano	10^-9
P	pico	10^-12
f	femto	10^-15
a	atto	10^-18

1 m = 100 cm = 1000 mm
1 m² = 10 000 cm² = 10⁶ mm²
1 m³ = 10⁶ cm³ = 10⁹ mm³
1 Mg m^-3 = 10³ kg m^-3 = 1 g cm^-3
1 kPa = 10 mbar
1 joule = 0.2388 cal
1 watt = 1 J s-1 = 0.8598 kcal h^-1
1 W m^-2 = 0.8598 kcal m^-2 h^-1
1 W m^-2 = 1.433 × 10^-3 cal cm^-2 min^-1
1 Hp = 745.7 W
1 W = 0.001431 Hp
Water flow (m³ s^-1) = 0.55 × Pump power (W)/Pressure (kPa)
Water flow (litre s^-1) = 5.43 × Pump power (kilowatts)/pressure (bars)

Brake Horsepower is the horsepower for an electric motor. Do not use for fuel-powered engines.

Conversion factors

Temperature

Standard unit: degree Celsius (°C)

degree Fahrenheit (°F)	°C = (°F-32) 5/9
kelvin(s) (K)	K = °C +273.15

Pressure (air pressure, vapour pressure)

Standard unit: kilopascal (kPa)

millibar (mbar)	1 mbar = 0.1 kPa
Bar	1 bar = 100 kPa
centimetre of water (cm)	1 cm of water = 0.09807 kPa
millimetre of mercury (mm Hg)	1 mm hg = 0.1333 kPa
atmosphere (atm)	1 atm =101.325 kPa
pound per square inch (psi)	1 psi = 6.896 kPa

Wind speed

Standard unit: metre per second (m s^-1)

kilometre per day (km day^-1)	1 km day^-1 = 0.01157 m s^-1
nautical mile/hour (knot)	1 knot = 0.5144 m s^-1
foot per second (ft s^-1)	1 ft s^-1 = 0.3048 m s^-1

Radiation

Standard unit: megajoule per square metre and per day (MJ m² day^-1) or as equivalent evaporation in mm per day (mm day^-1)

equivalent evaporation (mm/day)	1 mm day^-1 = 2.45 MJ m^-2 day^-1
joule per cm² per day (J cm^-2 day^-1)	1 J cm^-2 day^-1 = 0.01 MJ m^-2 day^-1
calorie per cm² per day (cal cm^-2 day^-1)	1 cal = 4.1868 J = 4.1868 10-6 MJ
	1 cal cm^-2 day^-1 = 4.1868 10^-2 MJ
	m^-2 day^-1
watt per m² (W m^-2)	1 W = 1 J s^-1
	1 W m^-2 = 0.0864 MJ m^-2 day^-1

Physical properties

Properties of Water

T	r_w	l
°C	Mg m^-3	kJ mol^-1
0	0.99987	45.0
4	1.00000	44.8
10	0.99973	44.6
20	0.99823	44.1
30	0.99568	43.7
40	0.99225	43.4

T = temperature, r_w = density of water and l = latent heat of vaporization

Properties of gases at P_b = 101.3 kPa barometric pressure

T	r
°C	mol m^-3
0	44.6
5	43.8
10	43.0
15	42.3
20	41.6
25	40.9
30	40.2
35	39.5
40	38.9

T= temperature and r = density

Black body emittance (W m^-2) as a function of subzero temperature (°C)

°C	0.0	-0.1	-0.2	-0.3	-0.4	-0.5	-0.6	-0.7	-0.8	-0.9
-14	256	255	255	255	254	254	253	253	253	252
-13	260	259	259	258	258	258	257	257	257	256
-12	264	263	263	262	262	262	261	261	260	260
-11	268	267	267	267	266	266	265	265	265	264
-10	272	271	271	271	270	270	269	269	269	268
-9	276	276	275	275	274	274	274	273	273	272
-8	280	280	279	279	279	278	278	277	277	276
-7	284	284	284	283	283	282	282	282	281	281
-6	289	288	288	287	287	287	286	286	285	285
-5	293	293	292	292	291	291	291	290	290	289
-4	298	297	297	296	296	295	295	294	294	294
-3	302	302	301	301	300	300	299	299	298	298
-2	306	306	306	305	305	304	304	303	303	302
-1	311	311	310	310	309	309	308	308	307	307
0	316	315	315	314	314	313	313	312	312	311

Images , EXPLOSION D’UN CONDENSATEUR ,(condensator , capacitor) , de Démarrage ,EN SURTENSION

written by Lilianne | 26 April 2020

Images, EXPLOSION OF A SURGE CAPACITOR

Un condensateur est un dispositif utilisé pour stocker une charge électrique, composé d’une ou plusieurs paires de conducteurs séparés par un isolant.

De façon inattendue, les condensateurs électrolytiques explosent avec un son énorme et parfois de la fumée.

صور انفجار مكثف

www.mbsm.pro , 500 Livres Documentaire

written by mahdi miled | 26 April 2020

تم إضافة أقسام وكتب جديدة إلى مكتبتي على درايف

يبلغ الآن عدد الكتب لدي أكثر من 500 كتاب يمكنكم تحميل ما تشاؤون منها

بمجرد الضغط على الرابط سوف ينقلكم مباشرةً إلى الكتاب

https://drive.google.com/folderview…

كما يمكنكم تحميل الكتب عن طريق قناة التلكرام من خلال هذا الرابط
https://t.me/ThurayaElectronics

ملاحظة : ( تحزير إلى أصحاب النفوس الضعيفة ممن يريدون استغلال رابط مكتبتي على درايف لكي يقومون بتقصيره واستبداله بروابط مشبوهة أريد أن أقول لكم أنني أقوم بنقل الكتب وتغيري رابط الوصول إليها بشكل مستمر لذالك لن تنجح بهذا الأمر )

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www.mbsm.pro , Compresseur Cubigel ,Compresseur GL90AA R-134a 1/4HP 230V ,

written by mahdi miled | 26 April 2020

Mbsm_dot_pro_private_PDF_GL90AAparamètres techniques
numéro de pièce
605185
fréon
R134a
type
GL90AA
voltage
220-240 V
fréquence
50 Hz
domaine d’utilisation
LBP
poids
9.4 kg
puissance
1/4 HP
puissance absorbée
184 W
cylindrée
8.1 cm³
système de moteur
RSIR
hauteur
185.6 mm
puissance à -30°C
148 W
puissance à -25°C
200 W
puissance à -20°C
261 W
puissance à -15°C
330 W
puissance à -10°C
407 W
puissance à -5°C
– W
puissance à 0°C
– W
puissance à +5°C
– W
puissance à +10°C
– W
température ambiante max.
43 °C

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Mbsm.pro , تأمين الأجهزة ,Lockout Tagout, المعدات الكهربائية, نظام السلامة المهنية

written by Lilianne | 26 April 2020

غلق بمشبك قابل للطي ، مما يسمح لستة أقفال لقفل جهاز واحد.

أو القفل والعلامة هو إجراء أمان يستخدم في إعدادات الصناعة والبحث للتأكد من أن الآلات الخطرة مغلقة بشكل صحيح ولا يمكن تشغيلها مرة أخرى قبل الانتهاء من أعمال الصيانة أو الإصلاح. يتطلب الأمر عزل ” مصادر الطاقة الخطرة وجعلها غير صالحة للعمل” قبل بدء العمل في المعدات المعنية. يتم بعد ذلك قفل مصادر الطاقة المعزولة ووضع علامة على القفل تحدد العامل الذي وضعه. عندها يمسك العامل بمفتاح القفل ، مما يضمن أنه فقط هو أو هي قادر على إزالة القفل وبدء تشغيل الجهاز. هذا يمنع بدء التشغيل العرضي لجهاز ما عندما يكون في حالة خطرة أو عندما يكون العامل على اتصال مباشر به. ^[1]

يستخدم Lockout-tagout في مختلف الصناعات كوسيلة آمنة للعمل على المعدات الخطرة ويفوضه القانون في بعض البلدان.

mbsm.pro , Compresseur Aspera , Embraco ,NEK2168GK , R404a/R507 , LBP ,3/4 HP,nominal output: 707 W

written by Lilianne | 26 April 2020

EMBRACO is a company specialized in cooling solutions and
world leader in the hermetic compressor market. Our mission:
provide innovative solutions for a better quality of life, always
attentive to technological excellence and sustainability.
Technological leadership, operational excellence and sustainability are some of the pillars
which ensure the EMBRACO differential over other companies in the world market. Its
products are now considered the favorite leading home appliance manufacturers by major
automakers and are spotlighted by manufacturers of commercial refrigeration equipment.
With global operations and production capacity exceeding 34 million units a year, the
company offers solutions that are differentiated for their innovation and low energy
consumption. Its 11.500 employees work in factories and offices located in Brazil
(headquarters), China, Italy, Slovakia, Mexico, the United States and Russia.
Energy efficiency is constantly sought in the processes, products and relationships with
the communities where it operates. Our company is the absolute leader in this segment,
being able to offer products that meet the most restrictive international standards
regarding energy consumption.
As a worldwide leader, EMBRACO tries to anticipate market changes, and in doing so, our
company is in a state of permanent transformation. We continuously assess our processes
in order to maintain our leadership within the industry and promote growth, without
forgetting the pillars of our organization.

Compressor ASPERA NEK2168GK | NEK 2168 GK

Refigerant	R404/R507
Working range[stC] LBP	-40 to -10
Nominal capacity [W] (evaporating temperature -23,3C, Condensing temperatur +54,4C)	688
Power supply	220-240V 50Hz
Engine type	CSIR
Displacement [cm³]	14,28
Weight [kg]	11,6

Evaporating temperature +55 C

Evaporating Temperature	Cooling Capacity +/-5%	Power Consumption +/-5%	Current Consumption +/-5%	Gas Flow Rate +/-5%	Efficiency +/-7%
°C	(kcal/h)	(W)	(Btu/h)	(W)	(A)	(kg/h)	(kcal/Wh)	(W/W)
-40	226	263	897	370	3,46	6,01	0,61	0,71
-35	309	359	1.224	435	3,57	8,22	0,71	0,82
-30	413	481	1.640	506	3,73	11,06	0,82	0,95
-25	541	629	2.146	584	3,95	14,52	0,93	1,08
-20	691	803	2.740	668	4,21	18,64	1,03	1,20
-15	863	1.004	3.424	759	4,53	23,43	1,14	1,32
-10	1.058	1.230	4.197	856	4,90	28,92	1,24	1,44

Refrigerant:

R404A, R507

mbsm.pro , Compresseur Aspera , Embraco NEK2168GK , R404A , LBP ,3/4 HP

Compresseur hermetique de Aspera – Embraco NEK2168GK – R404A

3/4 HP

220-240V 50 Hz

Cylindrée = 14.3 CM3

APPLICATIONS = LBP

Moteur type: CSR

www.mbsm.pro , when capacitor explodes , Pictures

written by Lilianne | 26 April 2020

A capacitor is a device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator.

Unexpectedly the electrolytic capacitors explodes with huge sound and sometime it smoke.

Get started , how to explode a capacitor ???
All capacitors have a maximum voltage and their destruction depends upon the internal construction. Explosions are understood only by delving into the internal construction of electrolytic capacitors – the primary culprit.

Most small value capacitors are simple sandwiches of conductor and insulator and when the voltage exceeds the dielectric strength of the insulation, they short out and burn, crack, pop, open, or smoke. Explosions are rare for these. Popping open is more likely. Their failure is self evident either visually or by failure to function in the circuit.

Most large value capacitors in order to be as small in physical size as possible, have to get the conductive plates of the capacitor as close together as possible and at the same time not so small that the voltage rating is impractical.

It is for this reason that the family of electrolytic capacitors was developed. The trick they use to get high capacity with small separations and reasonable voltage is that they use the “anodizing” of chemical electrolysis on one surface and a water based electrolyte for the other surface. Take one apart and see.

Notice that when a conductive metal is “anodized” by electrochemical process it turns into a dull film that is rather tough and is an insulator. This means that the actual conductive plate of the capacitor has this film entirely between itself and the other plate.

Then the other plate uses a trick too. There’s a water base solution soaked into a paper separator. Now if there was no water, the paper would be the dielectric of a normal capacitor separating the plates. But not here. Here the water has an alkali added to become a fair conductor. And as a liquid it soaks right into the surface structures of the capacitor. So it’s not the paper thickness at all – and not even the insulating surface on the other plate, but the inner recesses of the anodized surface that determine the dielectric distances.

So the operating voltage that a capacitor can tolerate depends upon how thick this anodized film is. And that is a function of it’s manufacture. Now there is a most useful characteristic that tells us we are nearing the max voltage, called leakage.

Here is a way you can check this out. Put in series, a test electrolytic capacitor (polarize it correctly), a variable power supply, a microammeter, and a 1 meg resistor (to limit and protect the meter). From zero as you increase the voltage there will be no current initially, then as you approach the spec op voltage, there will start a small leakage current. Since you have a limiting resistor here, you can increase the voltage without damage. continuing to increase the voltage discovers an increasing leakage current. It is a matter of practice how much safety you apply between the rating and the actual voltage of the circuit.

You can now see how it is that an electrolytic capacitor fails, it is not a voltage breakdown of the dielectric material, but the increase of leakage current that is troublesome. A rising leakage means heat which will boil the water and make steam – that’s the explosion process.

This is explosion as occasional failure of the few. But there is a more spectacular explosion process – it’s explosion by mistake – namely being installed backward. In such a case, the anodizing chemistry is reversed and rather rapidly, the anodized film starts to reverse, and quickly thins out at a weak spot in the rather large effective film area of the capacitor. Then we have short circuit currents and steam generation rather quickly. This sort of explosion usually fills the space (the casing or the whole room if exposed) with little shreads of aluminum foil and alkali soaked paper.

This insightful solution is most successful to achieve capacitors with large values in small spaces, but has a lot of lesser characteristics as the price to pay.

The worst limit, is storage. Electrolytic capacitors store very poorly, and the voltage rating can reduce substantially as the internal chemistry deteriorates. Some equipment manufacturers recommend that capacitors stored for a few years have their inner anodizing conditions restored by simply putting them to the spec voltage for a day to restore full spec.

At the least, if you replace capacitors with old stock, and it didn’t explode when power was restored, be aware that it may not reach it’s spec capacity value for a few hours. A capacitor in use will always be maintained by the voltage in the circuit you use it in.

When electrolytics are used without the circuit supplying a maintenance voltage to keep the anodized film that all depends upon, such as in speaker cross over applications that have no sustaining DC, then the values of the capacitor will deteriorate at least at storage rates, and if AC currents are substantial, even faster.

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www.mbsm.pro , EJECTEUR DAB, Pompe Monobloc Série Pa Double Aspiration Autoamorcante

written by mahdi miled | 26 April 2020

Électropompe centrifuge autoamorçante double aspiration du type jet, appropriée pour l’aspiration jusqu’à 50m de profondeur. Corps de pompe et support en fonte, roue en noryl ou sur demande en laiton. Injecteur type P20 standard de 4\” et 2\”. Température maxi. du liquide pompé : 50°C. Pression maxi. de fonctionnement : 8 bars.
Descriptif produit
Pompe pour aspirations profondes

Plage de fonctionnement: jusqu’à 4,3 m³/h

Plage de température du liquide: de -0°C à 40°C pour autres applications. de 0°C à +35°C pour usage domestique Liquide pompé: propre, ne contenant pas de corps solides ou abrasifs, non visqueux, non agressif, non cristallisé et chimiquement neutre.

Température ambiante maximum: + 40°C

Pression de service maximum: 6 bar (600 kPa) pour DP 82 DP 102 8 bar (800 kPa) pour DP 151 – DP 251

Indice de protection: IP 44 (IP 55 au bornier)

Classe d’isolement: F

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www.mbsm.pro , panne , compresseur, frigorifique , pas de refoulement et présence d’aspiration

written by mahdi miled | 26 April 2020

www.mbsm.pro , panne , compresseur, frigorifique , pas de refoulement et présence d’aspiration

Solution d’absence de refoulement et de changer le compresseur c’est une clapets casser

Comment tester les clapets d’un compresseur ?

Les clapets d’aspiration et de refoulement d’un compresseur à piston sont des organes relativement fragiles qui peuvent être détériorés par des coups de liquide massif ou par une succession de coups de liquide ou encore un manque de refroidissement du compresseur.

Quand doit-on suspecter que les clapets d’un compresseur sont hors service ou passablement usés.

La production frigorifique est faible.
Le temps de fonctionnement du compresseur est élevé
La basse pression est plutôt haute.
La haute pression est plutôt basse.
La température de refoulement est élevée.
Le point de consigne demandé est difficile à atteindre.

Bien entendu ces quelques points de repère ne sont pas uniquement constatés dans le cas de clapets détériorés mais ils doivent inciter à les vérifiés.

Procédure de vérification des clapets.

Mettre en place les manomètres HP et BP.

Essai des clapets d’aspiration

Fermer sur l’avant la vanne d’aspiration.
Shunter le pressostats basse pression.
Mettre en route le compresseur.
Le compresseur tire au vide très rapidement, les clapets d’aspiration sont fonctionnels.
Le compresseur a beaucoup de mal à tirer au vide, les clapets d’aspiration hors service.

Essai des clapets de refoulement.

Après avoir fait les essais des clapets d’aspiration et avoir arrêté le compresseur.
Observer le manomètre basse pression, la pression dans le carter ne doit pas remonter rapidement.
Si c’est le cas les clapets de refoulement sont fuyards.

Nb :

Si l’huile contenu dans le carter émulsionne de façon importante, c’est que l’huile contient du fluide frigorigène, ce qui peut être gênant pour le diagnostic. Vérifier que la résistance de carter soit bien en fonctionnement.