A compressor is a device that compresses a fluid typically used in a refrigeration circuit.

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 467.

Table 467 — IfcCompressor Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 468.

Table 468 — IfcCompressor Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 469.

Table 469 — IfcCompressor Quantity Sets

Material Constituents

The Material Constituents concept applies to this entity as shown in Table 470.
CasingMaterial from which the casing is constructed.
RefrigerantRefrigerant material.

Table 470 — IfcCompressor Material Constituents

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 471.
 RefrigerantInSINKREFRIGERATIONUncompressed vapor refrigerant entering the compressor.
 RefrigerantOutSOURCEREFRIGERATIONCompressed vapor refrigerant leaving the compressor.

Table 471 — IfcCompressor Port Nesting

XSD Specification:

 <xs:element name="IfcCompressor" type="ifc:IfcCompressor" substitutionGroup="ifc:IfcFlowMovingDevice" nillable="true"/>
 <xs:complexType name="IfcCompressor">
   <xs:extension base="ifc:IfcFlowMovingDevice">
    <xs:attribute name="PredefinedType" type="ifc:IfcCompressorTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcCompressor
SUBTYPE OF IfcFlowMovingDevice;
PredefinedType : OPTIONAL IfcCompressorTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcCompressorTypeEnum.USERDEFINED) OR ((PredefinedType = IfcCompressorTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCCOMPRESSORTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcCompressorType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no compressor type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcCompressorType.

Inheritance Graph:

ENTITY IfcCompressor
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcDistributionElement
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowMovingDevice
ENTITY IfcCompressor
PredefinedType : OPTIONAL IfcCompressorTypeEnum;

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