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This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces QC/T 768-2006 Coach flush toilet. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to QC/T 768-2006:
——The “scope” is modified (see Clause 1 hereof; Clause 1 of Edition 2006);
——The terms and definitions of “horizontal dimension” and “inside net height” are added (see Clause 3 hereof; Clause 3 of Edition 2006);
——“Classification” is added (see 4.1.3 and 4.1.4 hereof);
——Items c, f and h under “basic configuration” are modified, and items m, n and o are added (see 4.2 hereof);
——The “requirements for wires” is modified (see 5.7 hereof; 5.2.15 of Edition 2006);
——“The minimum volume of toilet fresh and waste water tanks” is modified (see 5.8 hereof, 5.2.14 of Edition 2006);
——“The requirements for prohibited substances” are added (see 5.9 hereof)
——“The requirements for internal dimension” are modified (see 5.10 hereof; 5.3 of Edition 2006);
——“The requirements for external dimension” are modified (see 5.11 hereof; 5.4 of Edition 2006);
——Subclauses 5.2.7, 5.2.9 and 5.2.10.1 are deleted (see Subclauses 5.2.7, 5.2.9 and 5.2.10.1 of Edition 2006)
——The requirements for “basic performance” are added (see 6.1 hereof);
——The requirements for “strength of toilet compartment, base plate and toilet seat” are modified (see 6.2 hereof; 5.2.5 of Edition 2006);
——The requirements for “illuminance” are modified (see 6.3 hereof; 5.2.16 of Edition 2006);
——The requirements for “handrail” are added (see 6.4 hereof);
——The requirements for “high and low temperature test” are added (see 6.5 hereof);
——The requirements for “vibration test” are added (see 6.6 hereof);
——The requirements for “corrosion resistance” are added (see 6.7 hereof);
——The assessment method for ventilation volume is modified (see 6.8; 5.2.10.2 of Edition 2006);
——The requirements for “leakage prevention” are added (see 6.9 hereof);
——The flame retardance requirements are modified (see 6.10 hereof; 5.2.4 of Edition 2006);
——The requirements for “air quality in the toilet” are added (see 6.11 hereof);
——The requirements for “limits of volatile organic compounds (VOCs) in non-metal materials” are added (see 6.12 hereof);
——The requirements for “electromagnetic compatibility” are added (see 6.13 hereof);
——The "Test methods" is added (see Clause 7 hereof);
——The “Inspection rules” is modified (see Clause 8 hereof; Clause 6 of Edition 2006);
——Subclause 8.1 is added (see 8.1 hereof);
——The end-of-manufacturing inspection items and type inspection items are modified (see 8.3 hereof; 6.1 and 6.2.2 of Edition 2006);
——The type inspection conditions are modified (see 8.4 hereof; 6.2.1 of Edition 2006);
——“Sampling and judgment” is deleted (see 6.2.3 of Edition 2006)
This document was proposed and is under the jurisdiction of the National Technical Committee 114 of Auto Standardization (SAC/TC 114).
The previous editions of this document and those replaced by this document are as follows:
——It was first issued as QC/T 768-2006 in 2006;
——This edition is the first revision.
Coach toilet
1 Scope
This standard specifies the classification and basic configuration, general requirements, test methods, inspection rules and marking, packaging, transport and storage of the coach toilet.
This document is applicable to toilets used on the coach.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute indispensable provisions 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 - Pictorial marking for handling of goods
GB/T 1236 Industrial fans - Performance testing using standardized airways
GB/T 2423.10-2019 Environmental testing - Part 2: Tests methods - Test Fc: Vibration (sinusoidal)
GB/T 2423.22-2012 Environmental testing - Part 2: Tests methods - Test N: Change of temperature
GB/T 4892 Dimensions of rigid rectangular transport packages
GB/T 6461 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests
GB/T 10125-2021 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 13095 Bathroom unit
GB/T 17729 Hygienic standard for the air quality inside long distance coach
GB/T 18655-2018 Vehicles boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers
GB/T 21437.2-2008 Road vehicles - Electrical disturbances from conduction and coupling - Part 2: Electrical transient conduction along supply lines only
GB/T 21437.3-2012 Road vehicles - Electrical disturbances from conduction and coupling - Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines
GB/T 28370 Detect methods for the air quality inside long distance coach
GB/T 30512 Requirements for prohibited substances on automobiles
GB/T 33014.2-2016 Road vehicles - Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy - Part 2: Absorber-lined shielded enclosure
GB/T 33014.4-2016 Road vehicles - Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy - Part 4: Bulk current injection (BCI)
GB 38262 Flammability of interior materials for buses
QC/T 414 Design rule of color and type code for automotive cables
QC/T 29106 Technical specification of automobile wire harness
ISO 10605:2008 Road vehicles - Test methods for electrical disturbances from electrostatic discharge
ISO 11452-8:2015 Road vehicles - Component test methods for electrical disturbances from narrowband radiated electromagnetic energy - Part 8: Immunity to magnetic fields
VDA 270 Determination of the odour characteristics of trim materials in motor vehicles
VDA 275 Determination of formaldehyde from vehicle interior with modified flask method
VDA 277 Determination of organic emission of non-metallic materials from vehicles interior
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
fresh water tank
container for storing clean water in the coach toilet
3.2
waste water tank
container for storing waste water in the coach toilet
3.3
sliding valve
device in the coach toilet to control waste water discharge
3.4
standing area
area between the door panel surface and the WC pan in the coach toilet for passengers to stand
3.5
longitudinal dimension
distance from the door panel to the tall panel of the coach toilet
3.6
horizontal dimension
distance between left and right wallboard of the coach toilet
3.7
inside net height
distance between the floor and the roof of the standing area in the coach toilet
4 Classification and basic configuration
4.1 Classification
4.1.1 According to the installation position, the coach toilets (hereinafter referred to as “toilets”) are divided into central-mounted type and rear-mounted type.
4.1.2 According to the way to use the toilet, the toilets are divided into those with squatting pan and pedestal pan.
4.1.3 According to the discharge mode of the waste water tank, the toilets are divided into electric control discharge type and manual discharge type.
4.1.4 According to the flushing mode, the toilets are divided into manual flushing type and automatic induction flushing type.
4.2 Basic configuration
The basic configuration of a toilet shall include:
a) Pedestal (squatting) pan;
b) Discharge devices: sliding valve, waste water tank, waste container, discharge button or pedal;
c) Fresh water devices: fresh water tank, water pump, inlet pipes, inlet joint, taps and other switches;
d) Hand washing devices: hand wash basin, hand sanitizer container;
e) Toilet paper storage rack (box);
f) Forced air exhaust;
g) Lighting devices: luminaires, circuits, switches and safety devices, etc.;
h) Alarm devices: safety (SOS) alarm, water level alarm of fresh (waste) water tank, smoke alarm and high temperature alarm;
i) Safety handrails (inside and outside);
j) Door lock;
k) Mirror (made of safety glass);
l) Usage state identification;
m) Control devices: integrated circuit board modules, induction probes.
n) Coat hooks (with safety protection features such as rebound or folding);
o) If it is used in alpine-cold areas, heating devices should be added, and the fresh and waste water tanks shall be equipped with heating devices and the surface shall be subjected to insulation protection.
5 General requirements
5.1 The galvanized and painted surfaces of metal parts and components in the toilet shall be smooth and free of peeling, and the welding seam shall be uniform and without rust, scar or pores or other defects.
5.2 The exposed parts of the toilet compartment and all parts and components shall be smooth in surface, uniform in color, neat in edge line and round in corners, and free of defects such as cracks, bubbles, burrs, folds or scratches. The toilet shall be free of sharp corners and edges and other structures or defects that can easily cause human injury.
5.3 The floor drain shall be set on the toilet floor, which shall be non-slip and easy to clean.
5.4 The periphery of the toilet door shall be provided with vibration reduction and sealing devices, and the toilet door cannot be opened by itself in the closed state.
5.5 The toilet door lock, whether locked or not, shall be able to be opened from inside, and from outside in case of emergency.
5.6 The installation and use of all electrical appliances shall meet the requirements that during the roll test of coach, the non-contact parts under normal use shall not be contacted, damaged or displaced.
5.7 The insulation and flame retardance of the wires shall meet the requirements that the wire harness in the engine compartment of the coach and near other heat sources shall adopt the flame retardant wires with temperature resistance of not less than 125 °C; those used in other parts shall be flame retardant wires with temperature resistance of not less than 100 °C. The color, model and specifications of wires shall meet the requirements of QC/T 414; harness performance shall meet relevant requirements of QC/T 29106.
5.8 The minimum volume of both clean water tank and waste water tank in the toilet shall meet the use requirements for passengers during coach operation. It can be calculated as follows:
Fresh water tank volume ≥ rated passengers × 1.5 L
Waste water tank volume ≥ rated passengers × 2.1 L
5.9 The parts and components used in the toilet shall meet the requirements for prohibited substances in GB/T 30512.
5.10 See Table 1 for the internal dimensions of the toilet and Figure 1 for the position schematic.
Table 1 Internal dimensions of the toilet
In: mm
S.N. Dimension name Dimension symbol Dimensional value
1 Inside net height a Central-mounted type ≥ 1,750
Rear-mounted type ≥ 1,650
2 Longitudinal dimension b ≥ 800
3 Horizontal dimension c ≥ 760
4 Width of upper space of squatting (pedestal) pan/left and right direction of squatting (pedestal) pan d ≥ 560
5 Stair height of the squatting pan e ≤ 360
6 Height of the pedestal pan f 380 ~ 480
7 Height of the wash basin j 700 ~ 1,100
8 Passable width when the door is opened (500 mm or more above the floor) h ≥ 350
9 Net height of the toilet door i ≥ 1,550
10 Height of the toilet door sill k ≤ 150
Figure 1 Schematic diagram for the position
5.11 See Table 2 for common external dimensions of the toilet.
Table 2 Common external dimensions of the toilet
In: mm
Dimension name Dimensional value
Longitudinal 860, 950, 1,030
Transverse 810
Height 1,800, 1,860, 1,900
Note: Dimensional tolerances not given in the table shall be ±5 mm.
6 Performance requirements
6.1 Basic performance
Under normal use conditions, the toilet shall meet the requirements of working environment temperature of -40 °C to 80 °C, nominal voltage of 24 V or 12 V, rated power < 200 W, working air pressure of 0.4 MPa to 0.8 MPa, washing water volume of 250 mL/time to 350 mL/time, flushing water volume of 400 mL/time to 500 mL/time, flushing time of 3 s to 5 s, water pump pressure (gauge pressure, the same below) of 0.2 MPa to 0.31 MPa.
6.2 Strength of toilet compartment, base plate and toilet seat
6.2.1 The strength of the compartment and base plate shall meet the requirements of GB/T 13095.
6.2.2 The toilet table shall not be damaged in terms of appearance after being tested according to 7.4.2.
Foreword v
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and basic configuration
5 General requirements
6 Performance requirements
7 Test methods
8 Inspection rules
9 Marking, packaging, transport and storage
