DK161399B

DK161399B - CAPSULATED COMPRESSOR

Info

Publication number: DK161399B
Application number: DK461685A
Authority: DK
Inventors: Lambert Johannes Mari Kuijpers
Original assignee: Whirlpool Int
Priority date: 1984-10-12
Filing date: 1985-10-09
Publication date: 1991-07-01
Also published as: JPS6196191A; DK461685A; ES289489U; DK461685D0; DK161399C; EP0181019B1; DE3570106D1; CN1004293B; ES289489Y; NL8403116A; EP0181019A1; CN85107455A

Description

DK 161399 BDK 161399 B

Opfindelsen angår en kompressor omfattende en hermetisk lukket kapsel, som rummer en motorkompresso-renhed med en indløbsåbning med et forbindelsesstykke, og som har en væg med en indløbsåbning, som er udstyret 5 med et forbindelsesstykke, hvilke forbindelsesstykker er indbyrdes forbundet med et fleksiblet sugerør, som tillader læk af gas og olie.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a compressor comprising a hermetically sealed capsule which contains a motor compressor purity having an inlet opening with a connecting piece and having a wall with an inlet opening equipped with a connecting piece, which connecting pieces are interconnected with a flexible suction pipe. which allows gas and oil leaks.

En sådan kompressor kendes fra EP-A-73469. I adskillige årtier er der blevet fremstillet kompressorer 10 med hermetisk lukket kapsel, hvor sugerøret, som udgår fra fordamperen, ender inde i kapslen. Motorkompressor-enheden trækker det fordampede kølemiddel fra rummet inde i kapslen. Det er også kendt, at der kan opnås en forbedret virkningsgrad ved at føre sugerøret gennem 15 kapselvæggen og forbinde det direkte til motorkompres-sorenhedens indløb. Denne direkte sugning reducerer kompressionstemperaturen, hvilket reducerer sandsynligheden for, at indkommende olie brændes. En af betingelserne pålagt en sådan forbindelse mellem kapsel-væggen og en-20 heden er, at røret skal "lække". Uden dette kan trykket i det hermetisk lukkede kapsel blive lavere (når kølemidlet absorberes i olien) eller højere end trykket i det lukkede fordamper-kompressorkredsløb. Et højere tryk i kapslen skal undgås, da dette kan resultere i, at der 25 opstår ekstra støj i lejerne.Such a compressor is known from EP-A-73469. For several decades, compressors 10 with hermetically sealed capsule have been manufactured, the suction tube exiting the evaporator ending up inside the capsule. The engine compressor unit draws the evaporated refrigerant from the compartment inside the canister. It is also known that an improved efficiency can be obtained by passing the suction tube through the capsule wall and connecting it directly to the inlet of the motor compressor unit. This direct suction reduces the compression temperature, reducing the likelihood of incoming oil burning. One of the conditions imposed on such a connection between the capsule wall and the unit is for the tube to "leak". Without this, the pressure in the hermetically sealed capsule may be lower (when the refrigerant is absorbed in the oil) or higher than the pressure in the sealed evaporator compressor circuit. A higher pressure in the capsule should be avoided as this may result in extra noise in the bearings.

En bedre løsning gives i EP patentansøgning nr.A better solution is given in EP patent application no.

0.073.469. Til direkte sugning anvendes et bøjeligt sugerør i form af et tæt viklet, cylindrisk skruefjederelement. Et sådant element overfører let kontaktstøj og 30 "lækker" nok til at give trykudligning, men lækker ikke så meget, at det forholdsvis kolde kølemiddel kan strømme fra sugerøret til det varmere rum inde i kapslen og tilbage, hvorved gassen, som returnerer, er forholdsvis varm.0073469. For direct suction, a flexible suction tube is used in the form of a tightly wound cylindrical screw spring element. Such an element transmits light contact noise and 30 "leaks" enough to provide pressure equalization, but does not leak so much that the relatively cold refrigerant can flow from the suction tube to the warmer space inside the capsule and back, leaving the gas returning warm.

35 Med opfindelsen opnår man en yderligere forbed ring af virkningsgraden for en sådan direkte sugende kompressor.The invention provides a further improvement in the efficiency of such a direct suction compressor.

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22

Til dette formål er ifølge opfindelsen sugerøret omgivet af en isolerende kappe, som er beliggende med afstand fra sugerøret. Den isolerende kappe hindrer udvekslingen af gas i sugerøret med gas i rummet inde i 5 kapslen, så at den indkommende gas opvarmes i minimalt omfang. Yderligere dæmper kappen gaspulseringer i gassen, der strømmer mod rummet inde i kompressorkapslen.For this purpose, according to the invention, the suction tube is surrounded by an insulating sheath located at a distance from the suction tube. The insulating jacket prevents the exchange of gas in the suction pipe with gas in the space inside the capsule, so that the incoming gas is heated to a minimal extent. Further, the casing dampens gas pulsations in the gas flowing toward the compartment inside the compressor casing.

En udførelsesform for kompressoren er ejendommelig ved, at en af kappens ender er fastgjort til et af 10 forbindelsesstykkerne, og at den anden ende er rettet nedad og er fri af sugerøret og er i forbindelse med rummet inde i kompressorkapslen.An embodiment of the compressor is characterized in that one of the ends of the sheath is attached to one of the 10 connecting pieces and that the other end is directed downwards and is free of the suction pipe and communicates with the space inside the compressor capsule.

Kappen skal omgive sugerøret med en vis afstand derfra, så at kappen ikke kan komme i berøring med suge-15 røret, når enheden starter og stopper. Kappen skal være åben i bunden for at tillade overskudsolie at dryppe tilbage til kompressorkapslen.The sheath must surround the suction tube at a certain distance from it so that the sheath cannot come into contact with the suction tube when the unit starts and stops. The sheath must be open at the bottom to allow excess oil to drip back into the compressor sheath.

En anden udførelsesform af kompressoren er ejendommelig ved, at kappen er lavet af et bøjeligt porøst 20 materiale. Et eksempel på dette er en flettet metal-eller plasticmuffe.Another embodiment of the compressor is characterized in that the casing is made of a flexible porous material. An example of this is a braided metal or plastic sleeve.

En udførelsesform for opfindelsen vil nu blive beskrevet i detaljer ved hjælp af eksempler med henvisning til den medfølgende tegning, hvor 25 fig. 1 er et skematisk lodret snit af en kom pressor, og fig. 2 viser et viklet fjederelement, der danner det bøjelige sugerør i kompressoren, vist i fig. 1, med den omliggende kappe.An embodiment of the invention will now be described in detail by way of example with reference to the accompanying drawings, in which: FIG. 1 is a schematic vertical section of a granular pressor; and FIG. 2 shows a wound spring element forming the flexible suction pipe in the compressor shown in FIG. 1, with the surrounding sheath.

30 Kompressoren omfatter et hermetisk lukket kapsel 1, i hvilket en motorkompressorenhed 2 er ophængt ved hjælp af fjedre 3. Enheden omfatter en elektrisk motor 4 og en sugepumpe 5. Den elektriske motor driver et stempel 7 ved hjælp af en forbindelsesstang 6. Det 35 fordampede kølemiddel trækkes ind i pumpen via et sugerør 8, forbundet med dæmpere i et forbindelsesstykkeThe compressor comprises a hermetically sealed capsule 1 into which a motor compressor unit 2 is suspended by springs 3. The unit comprises an electric motor 4 and a suction pump 5. The electric motor drives a piston 7 by means of a connecting rod 6. The evaporated refrigerant is drawn into the pump via a suction tube 8 connected to dampers in a connector

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3 14, komprimeres med pumpen og pumpes ind i det ikke viste køleanlæg via et trykrør 9. Et oliebad 10 er placeret i den nedre del af kapslen. Kapslens væg har en passage li forsynet med et forbindelsesstykke 12. Mo-5 torkompressorenheden 2' s sugepumpe har en indløbsåbning 13 for forbindelsesstykket 14. Sugerøret 8 strækker sig mellem de to forbindelsesstykker 12 og 14. Sugerøret er bøjeligt og har formen af et cylindrisk viklet fjederelement 15 med tæt viklede vindin-10 ger 16. I én udførelsesform er en isolerende kappe 19 stift forbundet til forbindelsesstykket 14. Kappen er fri af fjederelementet 15. Fortrinsvis er den indre diameter af kappen 3 til 5 mm større end den ydre diameter af fjederelementet. Tilfredsstillende resultater 15 er blevet opnået med et viklet fjederelement, hvis tykkelse er 0,8 - 1,0 mm, hvis vindinger har en bredde på ca. 20 mm, hvis længde er ca. 50 mm og som har en højdeforskel mellem vindingerne på 0,05 - 0,15 mm. Sådant et fjederelement tillader bevægelser af motorkompres-20 sorenheden i forhold til kapslen og overfører ikke let akustiske vibrationer, og grundet de snævre spalter mellem vindingerne tillader sugerøret nogen udsivning af gas og olie. Kappen giver en termisk isolering og dæmper gaspulseringer i gassen overfor rummet inde i kom-25 pressorkapslen.3 14, is compressed with the pump and pumped into the cooling system not shown via a pressure tube 9. An oil bath 10 is located in the lower part of the capsule. The wall of the capsule has a passage 1 provided with a connector 12. The suction pump of the motor compressor unit 2 has an inlet opening 13 for the connector 14. The suction tube 8 extends between the two connectors 12 and 14. The suction tube is flexible and has the shape of a cylindrical wound. spring element 15 with tightly wound windings 16. In one embodiment, an insulating sheath 19 is rigidly connected to the connector 14. The sheath is free of the spring element 15. Preferably, the inner diameter of the sheath 3 to 5 mm is greater than the outer diameter of the spring element. . Satisfactory results 15 have been obtained with a wound spring element, the thickness of which is 0.8 - 1.0 mm, whose turns have a width of approx. 20 mm, the length of which is approx. 50 mm and having a height difference between the turns of 0.05 - 0.15 mm. Such a spring element allows movements of the motor compressor unit relative to the capsule and does not transmit light acoustic vibrations, and due to the narrow gaps between the windings, the suction pipe allows some gas and oil leakage. The jacket provides a thermal insulation and dampens gas pulsations in the gas against the space inside the compressor canister.

Køleanlægget forbundet til kompressoren indeholder altid noget fra kompressorkapslen overført olie. I fjederelementet sætter denne olie sig mellem vindingerne og dette giver også nogen forsegling af kølemiddeldamp.The cooling system connected to the compressor always contains some oil transferred from the compressor capsule. In the spring element, this oil settles between the windings and this also gives some sealing of refrigerant vapor.

30 En ekstra fordel ved dette er, at når enheden startes og stoppes, udslynges olie, ved hjælp af fjederelementets vibrationer, som kan have en væsentlig størrelse. Denne overskudsolie sendes ind i kappen, og når rummet inde i kapslen via den nedre ende af kappen. En olieseparator 35 behøves derfor ikke. Denne konstruktion forhindrer også oliestænk i kompressorkapslen i at nå spalterne mellem fjederelementets vindinger.An additional advantage of this is that when the unit is started and stopped, oil is ejected by the vibrations of the spring element, which may be of considerable size. This excess oil is sent into the casing and reaches the space inside the capsule via the lower end of the casing. Therefore, an oil separator 35 is not needed. This construction also prevents oil splashes in the compressor capsule from reaching the gaps between the spring element windings.

Claims

Alternatively, the sheath may be a sleeve made of a flexible and porous material. This sleeve may surround the entire suction tube at intervals and its ends may be attached to the respective connectors. A flexible sleeve follows the movement of the unit relative to the capsule 20 in the same way as the flexible suction tube. However, it is then required that the hollow spaces in the sleeve be given the correct dimensions. 25

A compressor comprising a hermetically sealed capsule (1) which houses a motor compressor unit (2) having an inlet opening (13) with a connecting piece (14) and 30 having a wall with an inlet opening (11) equipped with a connecting piece (12), which connecting pieces are connected to each other over a hollow flexible suction pipe (15) allowing gas and oil leaks, characterized in that the suction pipe (15) is surrounded by an insulating jacket (19) arranged spaced from the suction tube, which also allows gas and oil leaks DK 161399 B and which are attached to at least one of the connectors (12, 14) so that movement of the connectors relative to each other is substantially not prevented.

Compressor according to claim 1, characterized in that one end of the casing (19) is fixed to one of the connecting pieces and the other end is directed downwards and is free of the suction pipe (15) and communicates with the space inside the compressor capsule. (1).

Compressor according to claim 1, characterized in that the sheath (19) is made of a flexible and porous material.