refrigerator
Enable an AI agent to recognise a refrigerator, assess its ability to maintain intended refrigerated storage conditions, and determine appropriate use, adjustment, maintenance or escalation.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise a refrigerator, assess its ability to maintain intended refrigerated storage conditions, and determine appropriate use, adjustment, maintenance or escalation.
A refrigerator is an insulated cabinet whose interior is held below ambient temperature by a continuous refrigeration process - most often a vapor-compression cycle, otherwise absorption or thermoelectric - so that a closed compartment remains in a controlled chilled band (typically about 0-8 °C) for storage of perishable goods, as distinct from a freezer designed to hold product at or below −18 °C.
It can be Identify compartments and match proposed contents to documented storage capabilities.; Read controls, alarms and temperature measurements, and request monitoring where evidence is insufficient.; Adjust supported temperature settings or modes within documented limits and granted authority.; Arrange contents to preserve door closure, compartment suitability and required airflow.; Perform authorised cleaning, drainage checks or defrost procedures using appliance-specific instructions.; Flag unreliable cooling, restrict further loading when warranted, and route repair or retirement to an appropriate service..
Distinguishing features
Has an insulated storage enclosure and a mechanism intended to remove heat, distinguishing it from an ordinary cupboard.
Maintains refrigerated storage through a refrigeration mechanism rather than relying solely on previously chilled ice or passive insulation, distinguishing it from a passive cooler.
Includes a compartment intended for refrigerated rather than exclusively frozen storage; a freezer-only appliance belongs to a neighbouring model.
Cools an enclosed storage space for contents rather than primarily conditioning an occupied room, distinguishing it from an air conditioner.
Can be identified as an appliance with its own storage enclosure and operating controls; a walk-in room served by refrigeration equipment requires a cold-room boundary assessment.
Scope
+ Appliance identity, intended storage application and compartment configuration
+ Cooling mechanism, energy supply and environmental operating dependencies
+ Compartment temperatures, temperature history and evidence of cooling performance
+ Door closure, seals, airflow, drainage and defrost behaviour
+ Loading constraints, available storage space and compatibility with contents
+ Control actions, faults, cleaning, maintenance and retirement constraints
- Food freshness, preparation, nutrition and consumption decisions
- Medicine efficacy, specimen integrity and product-specific storage rules
- Building electrical circuits, plumbing and room ventilation systems
- Standalone freezer models and freezer-specific preservation processes
- Building-scale cold rooms and industrial refrigeration plants
- Refrigerant manufacture, supply chains and waste-processing facilities
Characteristics
- Intended storage application
- Household food, commercial food, beverages, medical or laboratory, other, unknown; supported by product documentation Determines which requirements must be obtained before judging suitability.
- Compartment configuration
- Named compartments with refrigerated, frozen, convertible or other documented roles Prevents measurements and actions for one compartment being applied to another.
- Cooling mechanism
- Vapour compression, absorption, thermoelectric, other documented mechanism, unknown Changes energy dependencies, expected operation and service requirements.
- Energy supply
- Required and connected energy sources, ratings and current availability Distinguishes absent supply from a possible cooling-system fault.
- Compartment temperature
- Degrees Celsius, with compartment, sensor location, timestamp and measurement uncertainty Provides evidence of actual conditions rather than relying on the control setting.
- Temperature control setting
- Degrees Celsius where supported, otherwise the labelled control position and operating mode Records requested behaviour without treating an uncalibrated dial as a measured temperature.
- Temperature excursion
- Observed minimum, maximum and duration outside an explicitly identified requirement; unknown where history is missing Supports investigation and referral to the relevant contents model.
- Ambient operating conditions
- Ambient temperature in degrees Celsius and other conditions required by the manufacturer Allows comparison of installation conditions with documented operating limits.
- Door and gasket condition
- Per door: open, closed, obstructed or unknown; gasket intact, damaged, contaminated or unassessed Identifies possible heat ingress and whether normal closure can be restored.
- Storage capacity and loading
- Documented usable volume in litres, shelf load limits in kilograms where specified, and observed loading Supports placement decisions while preserving required airflow and structural limits.
- Operating state
- Off, starting, cooling, idle, defrosting, alarm, fault or unknown, with evidence and time Distinguishes an expected operating phase from loss of refrigeration.
- Refrigerant identification
- Labelled refrigerant designation, not applicable where established, or unknown Informs service and retirement routing without guessing the substance from appliance appearance.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.refrigerator
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 35 questions.
Refrigerator identity and compartments Establishes what appliance is present and which storage spaces its refrigeration functions serve.
An agent must distinguish refrigerator capabilities from assumptions based on appearance or a generic appliance name.
Appliance identification
Connects the physical refrigerator to evidence of its intended function and capabilities.
Documented refrigeration purpose
Record manufacturer and model identification, the intended storage application and evidence that the enclosure provides refrigerated storage.
- What label, manual or other evidence identifies this appliance and its intended storage application? provenance
- Does the appliance provide a refrigerated compartment, or is it a passive cooler, freezer-only appliance or cold-room installation? boundary
Compartment topology
Separates storage spaces by thermal role and control relationships.
Compartment roles and control coupling
Record each compartment's intended role, convertible modes and any documented sharing of controls or cooling paths.
- Which compartments are intended for refrigerated, frozen or convertible storage? definition
- Which settings or operating modes affect multiple compartments, and what documentation establishes that relationship? provenance
Refrigeration performance Makes actual storage conditions and their uncertainty distinguishable from requested settings.
A refrigerator can display a setting or appear to run without demonstrating that its storage conditions meet a requirement.
Temperature evidence
Records measurements in their spatial, temporal and operational context.
Observed versus requested temperature
Record control settings separately from measured temperatures, identifying whether measurements represent air, a buffered probe or contents.
- What temperature was measured, when, where and with what sensor or measurement method? measurement
- Does the displayed value represent a setpoint, a current measurement or another manufacturer-defined indicator? definition
- What documented requirement is being used to judge this compartment's temperature? provenance
Temperature history and recovery
Relates changes in temperature to events and identifies gaps that prevent reliable assessment.
Excursions and cooling recovery
Record temperature excursions and recovery after loading, door openings, power interruptions or defrost, without inferring unobserved history.
- What temperature range and excursion duration are supported by observations, and where are monitoring gaps? measurement
- Which loading, door, power or defrost events coincide with the observed temperature change? provenance
- What documented recovery criterion determines whether to continue monitoring or escalate a possible cooling failure? action
Installation and heat rejection Records the external conditions and connections required for the refrigerator to remove heat.
Poor cooling may arise from unsuitable installation or unavailable energy rather than an internal defect.
Energy and cooling dependencies
Identifies the refrigeration mechanism and its required supplies.
Required supplies and availability
Record the documented cooling mechanism, required energy sources and whether each required connection is available and appropriate.
- Which refrigeration mechanism and energy requirements are stated on the appliance or in its documentation? provenance
- Are the required supplies currently available, and what observation supports that assessment? measurement
Ambient and placement constraints
Assesses the refrigerator's surroundings against its installation instructions.
Heat rejection and installation fit
Record ambient conditions, required clearances, ventilation obstructions and any documented positioning or mounting requirements.
- How do measured ambient temperature and available clearances compare with this model's documented limits? measurement
- Are required heat-rejection paths obstructed or exposed to installation conditions the manufacturer excludes? boundary
- Which authorised placement or ventilation correction can be made, and what performance observation should follow? action
Storage envelope and loading Describes how closure, internal arrangement and moisture management affect usable refrigerated storage.
Nominal capacity alone does not show whether contents can be stored without obstructing closure, circulation or drainage.
Doors, seals and moisture
Examines the enclosure's ability to close and manage condensation or frost.
Closure, frost and drainage condition
Record door closure, gasket condition, frost accumulation, condensation and drainage observations without treating any single symptom as a confirmed diagnosis.
- Do all doors and drawers close as intended, and are their seals damaged, dirty or obstructed? measurement
- Where are frost, condensation or water accumulating, and under what operating conditions? measurement
- Which cleaning or defrost procedure is documented for this appliance and permitted for the acting agent? action
Contents placement and fit
Connects storage requests to compartment capability and loading constraints.
Load compatibility and airflow
Record proposed contents' externally supplied storage requirements, available space, shelf limits and placement restrictions.
- Which compartment can meet the proposed contents' documented storage requirements, and which requirements remain unknown? boundary
- Does the proposed placement preserve required airflow, door closure and documented shelf or drawer load limits? measurement
- Should the agent accept, rearrange or defer the proposed load based on available capacity and current cooling evidence? action
Operation, service and retirement Connects operating evidence to supported controls, fault response and lifecycle actions.
An agent must distinguish routine refrigerator operation from actions requiring appliance-specific procedures or specialist service.
Controls, modes and alarms
Interprets the appliance's available controls and reported operating conditions.
Supported control and alarm response
Record available modes, active settings, alarm indications and documented meanings, including any mode that changes normal storage capability.
- Which mode is active, and what does the manual say it does to each compartment's cooling behaviour? definition
- What alarm or fault indication is present, and which appliance-specific source explains it? provenance
- Which authorised control action is appropriate, and what observation will verify its effect? action
Maintenance and end of service
Records service evidence and the conditions for continued use, repair, relocation or retirement.
Service boundaries and disposition
Record unresolved symptoms, maintenance history, refrigerant identification where applicable and documented requirements for service, transport and disposal.
- Which maintenance or repair actions are evidenced, and which cooling, leakage or mechanical symptoms remain unresolved? provenance
- Which proposed tasks are user-serviceable according to the documentation, and which require a qualified service provider? boundary
- What appliance-specific instructions and applicable local requirements govern repair, relocation or retirement? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Household all-refrigerator (fresh-food cabinet only)
- Household refrigerator-freezer (top-freezer, bottom-freezer, side-by-side, or French-door)
- Compact or mini refrigerator
- Commercial reach-in refrigerator
- Walk-in refrigerator (walk-in cooler / cold room)
- Glass-door merchandiser or display refrigerator
- Medical, laboratory, or vaccine refrigerator
- Absorption refrigerator (gas, LPG, or multi-fuel, including RV and off-grid units)
- Which of these kinds and varieties hold for the sense of refrigerator this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q1463332 - Item for refrigerator as a cooling appliance; confirm against the current Wikidata record if using as a primary key.
- Harmonized System (HS) - 8418; 8418.10 combined refrigerator-freezers with separate external doors; 8418.21 compression-type household refrigerators; 8418.29 other household refrigerators - Heading 8418 also covers freezers, heat pumps, and other refrigerating equipment; subheadings are needed to isolate refrigerators.
- CPV (EU public procurement) - 39711100-0 - Common Procurement Vocabulary code for refrigerators.
- GTIN / UPC / EAN - per finished unit; 8, 12, 13, or 14 digit GS1 identifier - Identifies a specific manufacturer SKU, not the class.
- Which of these identifiers and schemes hold for the sense of refrigerator this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- IEC 62552 (International Electrotechnical Commission) - household refrigerating-appliance characteristics and test methods
- IEC 60335-2-24 (International Electrotechnical Commission) - safety of household refrigerating appliances
- UL 60335-2-24 (UL) - North American safety listing for household refrigerating appliances (successor to UL 250)
- AHAM HRF-1 (Association of Home Appliance Manufacturers) - energy and internal volume of household refrigerating appliances
- 10 CFR Part 430 (U.S. Department of Energy) - energy conservation standards and test procedures for consumer refrigerators
- ENERGY STAR Residential Refrigerators and Freezers specification (U.S. Environmental Protection Agency)
- Commission Regulation (EU) 2019/2019 (European Commission) - energy labelling of refrigerating appliances
- Commission Regulation (EU) 2019/2024 (European Commission) - ecodesign requirements for refrigerating appliances
- NSF/ANSI 7 (NSF International) - commercial refrigerators and freezers
- 16 CFR Part 1750 / Refrigerator Safety Act (U.S. Consumer Product Safety Commission) - inside opening of household refrigerator doors
- ISO 5149 (International Organization for Standardization) - refrigerating systems and heat pumps, safety and environmental requirements
- ASHRAE Standard 15 (ASHRAE) - safety standard for refrigeration systems
- EPA Significant New Alternatives Policy, SNAP (U.S. Environmental Protection Agency) - acceptable refrigerants
- Regulation (EU) 2024/573 on fluorinated greenhouse gases (European Union) - HFC refrigerant restrictions affecting refrigerator design
- Which of these standards and regulation hold for the sense of refrigerator this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Domestic kitchens: daily storage of perishable food in a fresh-food compartment held near 4 °C, often with a frozen-food compartment in the same cabinet
- Foodservice: reach-in and walk-in cold holding of ingredients under health-code temperatures (commonly ≤ 5 °C / 41 °F)
- Retail: glass-door merchandisers for packaged food and beverages
- Healthcare and immunization programmes: 2-8 °C storage of vaccines and pharmaceuticals in purpose-built medical refrigerators
- Laboratories: storage of reagents, samples, and media
- Hotels and offices: compact minibars and under-counter units
- Vehicles and off-grid sites: 12 V compressor units or absorption refrigerators running on gas or LPG
- Which of these real-world use hold for the sense of refrigerator this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Fresh-food compartment air temperature - 0-8, commonly set near 4; foodservice cold-hold limit 5 - °C
- Freezer compartment temperature (if present) - at or below −18 - °C
- Net storage volume - compact 30-150; household 150-800; commercial reach-in often 400-2000 - L
- Annual energy consumption - household about 100-700 depending on size, climate class, and efficiency - kWh/year
- A-weighted sound emission - about 32-48 - dB(A)
- Hydrocarbon refrigerant charge (household R600a) - about 20-80 - g
- Running electrical power (household compressor on-cycle) - about 50-200 - W
- Which of these typical measurements hold for the sense of refrigerator this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Sealed-system or compressor failure, loss of cooling, and subsequent food spoilage
- Refrigerant leak: flammability of isobutane (R600a) and propane (R290) in household charges; toxicity of ammonia in some absorption units
- Door-gasket failure and warm-air infiltration, raising compartment temperature and energy use
- Automatic-defrost failure and evaporator ice blocking airflow
- Temperature-control failure causing freeze damage to fresh food or unsafe warming
- Foodborne illness from time-temperature abuse of stored food
- Electrical fault or compressor overheating leading to fire
- Child entrapment in discarded household units if the door latches and cannot be opened from inside
- Condensate overflow, standing water, and mould growth
- Tip-over of unsecured or empty cabinets
- Which of these failure modes and hazards hold for the sense of refrigerator this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Everyday naming: U.S. refrigerator/fridge; UK and much of the Commonwealth fridge, with fridge-freezer as the default household form; dated U.S. icebox
- Volume is sold in cubic feet in the United States and in litres in most other markets
- Energy labels differ: U.S. EnergyGuide kWh/year and ENERGY STAR; EU A-G scale under 2019/2019; Japan Top Runner; Australia/New Zealand zoned energy rating
- Household refrigerant practice: R600a has long been dominant in Europe and much of Asia; North America remained on R134a later and has been shifting toward hydrocarbons and other low-GWP fluids
- India's retail split of direct-cool versus frost-free is a primary product distinction not used the same way in Europe or North America
- North American foodservice says walk-in cooler; UK and much of Europe say cold room
- Food-code cold-hold setpoints are commonly 41 °F (5 °C) in the United States and around 5 °C or 8 °C depending on national hygiene rules in Europe
- Which of these regional variation hold for the sense of refrigerator this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- freezer - A freezer is designed to store food at or below −18 °C; a refrigerator's fresh-food compartment is designed to stay above the freezing point of water, typically 0-8 °C.
- passive cooler or ice chest - A cooler only slows heat gain with insulation and a cold source such as ice; a refrigerator continuously extracts heat with a refrigeration cycle.
- air conditioner - An air conditioner conditions room air; a refrigerator conditions a closed, hygienic storage enclosure and is not a space-cooling appliance.
- wine cooler or wine storage appliance - Wine appliances typically hold 7-18 °C for beverage ageing and are excluded from ordinary food-refrigerator energy and hygiene classes; they are not a food-safety cold-hold device.
- blast chiller - A blast chiller is built for rapid pull-down of cooked food through the danger zone; a refrigerator is a storage appliance, not a rapid-chill process unit.
- heat pump - The same vapor-compression physics is used, but a heat pump's useful product is space heating or cooling rather than a food-storage compartment held in a chilled band.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of refrigerator this model covers, and on what evidence? provenance
Sources
- IEC 62552 Household refrigerating appliances - Characteristics and test methods. International Electrotechnical Commission. - Definition of household refrigerating appliances, compartment types, internal volume, and temperature test methods used to distinguish refrigerators from freezers.
- IEC 60335-2-24 Household and similar electrical appliances - Safety - Part 2-24: Particular requirements for refrigerating appliances, ice-cream appliances and ice makers. International Electrotechnical Commission. - Safety requirements for household refrigerators, including electrical, mechanical, and flammable-refrigerant hazards.
- Commission Regulation (EU) 2019/2019 of 11 March 2019 supplementing Regulation (EU) 2017/1369 as regards energy labelling of refrigerating appliances. Official Journal of the European Union. - Product scope, energy labelling, and the EU distinction among refrigerating appliances, wine storage appliances, and freezers.
- Commission Regulation (EU) 2019/2024 of 1 October 2019 laying down ecodesign requirements for refrigerating appliances. Official Journal of the European Union. - Ecodesign requirements, energy-efficiency limits, and refrigerant-related design constraints for refrigerating appliances placed on the EU market.
- AHAM HRF-1 Energy and Internal Volume of Refrigerating Appliances. Association of Home Appliance Manufacturers. - North American household test method for refrigerated volume and energy consumption used with U.S. DOE and ENERGY STAR ratings.
- 10 CFR Part 430 Energy Conservation Program for Consumer Products. U.S. Department of Energy. - U.S. energy-conservation standards and test procedures for household refrigerators and refrigerator-freezers.
- NSF/ANSI 7 Commercial Refrigerators and Freezers. NSF International. - Construction, temperature performance, and sanitation requirements that define commercial food-storage refrigerators in North American foodservice.
- FDA Food Code. U.S. Food and Drug Administration. - Cold-holding temperature practice (41 °F / 5 °C) that governs how refrigerators are used in retail food establishments.
- 16 CFR Part 1750 Standard for Devices to Permit the Opening of Household Refrigerator Doors from the Inside (Refrigerator Safety Act). U.S. Consumer Product Safety Commission. - Child-entrapment hazard and the requirement that household refrigerator doors can be opened from the inside.
- Harmonized System heading 8418, Refrigerators, freezers and other refrigerating or freezing equipment; heat pumps. World Customs Organization. - Customs classification of refrigerators, including 8418.10 combined refrigerator-freezers and 8418.21 compression-type household refrigerators.
What the second pass must settle
- Should this registry entry cover domestic, commercial, medical and laboratory refrigerators through application-specific extensions, or do existing registered models already own some of those concepts?
- How should an integrated freezer compartment link to a freezer model while preserving one source of truth for the combined appliance and its shared controls?
- Which temperature-monitoring methods, sensor placements and recovery criteria are adequate for each intended storage application?
- Which manufacturer-specific operating limits, loading restrictions and maintenance procedures can be established for the refrigerator being modelled?
- Which jurisdiction-specific service, refrigerant handling and disposal requirements apply, and which actions may the agent perform directly?