This standard applies to commercial single- and double-sided electric heating pans for general household use. GB 4706.37-1997 Special requirements for safety of commercial single- and double-sided electric heating pans for household and similar electrical appliances GB4706.37-1997 Standard download and decompression password: www.bzxz.net

GB4706.37—1997
Foreword
This standard is equivalent to IEC335-2-38 "Safety of Household and Similar Electrical Appliances Part 2: Special Requirements for Commercial Single- and Double-Sided Electric Heating Pans" (1986) (1st edition). This standard should be used in conjunction with GB4706.1-92 "General safety requirements for household and similar electrical appliances".
The safety standards for household and similar electrical appliances consist of two parts. The first part is the general requirements, and the second part is the special safety requirements for the product.
The part of this standard that says "applicable" means that the corresponding provisions in GB4706.1-92 are applicable to this standard; the part of this standard that says "replace" or "modify" should be based on this standard. The provisions in the standard shall prevail; the part marked "added" in this standard means that in addition to complying with the corresponding provisions of GB4706.1-92, it must also comply with the added provisions in this standard. This standard is proposed by the Industrial Department of the Ministry of Domestic Trade of the People's Republic of China. This standard is under the jurisdiction of the Commercial Electrical Food Processing and Service Equipment Subcommittee of the National Technical Committee for Standardization of Household Electrical Appliances. This standard was drafted by: National Catering Service Machinery Quality Supervision and Inspection Center. The main drafters of this standard: Gu Xiru, Xia Xiaoli, Zhu Jing, Mao Suhua GB4706.37—1997
IEC Foreword
1) IEC related technical committees formulated by all national committees with special concerns about this A formal resolution or agreement on a technical matter that expresses as nearly as possible an international consensus on the issues involved. 2) These resolutions or agreements are in the form of recommendations for international use and are accepted by national committees in this sense. 3) In order to promote international uniformity, IEC hopes that all national committees should adopt them to the extent that their domestic circumstances permit. The contents of IEC standards serve as regulations for their countries. Any inconsistencies between the standards recommended by IEC and the corresponding national standards should be clearly stated in the national standards as much as possible.
IEC Preface
This publication was prepared by Subcommittee 61E of IEC Technical Committee 61 "Safety of Household and Similar Electrical Appliances". It formed The second edition of the IEC 335-2-38 publication and replaces the first edition (1982). The text of this second edition is required to be used in conjunction with the IEC 335-1 publication on which it is based. Based on the second edition (1976) and the second printing (1983), it includes revisions No. 1 (1977), No. 2 (1979) and No. 3 (1982) in future IEC335-1 publications. should be taken into account in the new version or its modifications,
This Part 2 supplements or modifies the corresponding provisions in the IEC335-1 publication in order to convert the publication into the IEC standard: Commercial single-double-sided electric heating Safety Requirements for Clan (Second Edition). If an individual clause in Part I is not mentioned in Part II, the clause is still applicable if it is marked as "added", "modified" or "replaced" in this second edition. The relevant requirements, test specifications or instructions in Part 1 shall be modified accordingly. The following IEC publications are cited in this standard:
Publication No. 529 (1976): Classification of the degree of protection provided by the enclosure 1.
National Standards of the People's Republic of China
Safety of household and similar electrical appliances
Special requirements for commercial single- and double-sided electric heating pans
Safety of household and similar electrical appliancesParticular requirements for Commercial electric griddles and griddle grills Except for the following content, this chapter in GB4706.1-92 is applicable. 1.1 This article is replaced by the following content:
GB4706.37-1997
idt IEC 335-. 2-38:1986
This standard applies to commercial single- and double-sided electric heating pans that are not used for general household use. The electrical parts of appliances that use other forms of energy are also within the scope of this standard. The non-electrical parts are not included in the electrical parts. The impact should be considered.
This standard does not apply to:
Electric grills for continuous operation for mass production of food;
-In the presence of corrosive or explosive gases (dust , steam or gas). For appliances used in vehicles, ships or aircraft, special requirements may need to be considered for appliances used in tropical countries. Additional requirements specified by departments and labor protection departments. 2 Definition
This chapter in GB4706.1-92 applies except for the following content. 2.2.4 This article adds the following content:
Rated. The input power is the sum of the rated input powers of all the individual components of the appliance that can operate simultaneously; among several possible such combinations, the combination with the largest input power is used to determine the rated input power. 2.2.19 The following content is added to this article:
“Class I” used in this standard should be understood as class structural components. 2.2.20 The following content is added to this article:
The "class" used in this standard should be understood as a class structural component. 2.2.29 This article is replaced by the following:
Full heat release condition means the following conditions, under which the appliance works: the appliance operates without load according to the manufacturer's instructions, and the controller is adjusted to the following temperature, temperature Measured at the hottest point of each baking surface being controlled.
The segment controller is adjusted to the first position to make the temperature equal to or greater than 275℃. The cycle controller should be adjusted so that the average temperature within the cycle is 275 ± 5°C. If this temperature cannot be reached, adjust the controller to the maximum setting value. The State Bureau of Technical Supervision approved the implementation on 1998-12-01 on 1997-11-25
GB4706.37-1997
The double-sided electric heating pan is opened or closed during operation, whichever is more disadvantageous. In the closed position, use a heat-resistant, low thermal conductivity 10mm thick isolation plate to separate the electric heating plates. The area of ??the isolation plate is equal to the smaller baking area of ??the two heating plates. For double-sided electric heating pans where the two heating plates are not controlled separately, the controller should be adjusted so that the directly controlled heating plate reaches sufficient heat release conditions. When the two heating plates are controlled separately, sufficient heat release conditions apply to both heating plates. 2.2.30 This article is replaced by the following content
Normal load means that the appliance operates under sufficient heat dissipation conditions, and the motor installed in the appliance operates in the required manner, and the manufacturer's instructions indicate that it may occur during normal use. loads when working under the harshest conditions. The following clauses are added to this chapter:
2.2.101 A single-sided electric heating pan is an appliance for baking food in which one side of the food is in direct contact with a heating surface. 2.2.102 Double-sided electric griddle is an appliance for baking food that directly contacts both sides of the food with the two heating surfaces at the same time. 3 General requirements
This chapter in GB4706.1-92 applies. 4 General instructions in testing
Except for the following content, this chapter in GB4706.1-92 applies. The following clauses are added to this chapter:
4.101 For combined appliances, if the input power of the heating part is increased to 1.15 times the rated input power, the voltage required is higher than that required when the motor voltage is increased to 1.06 times the rated voltage. If the voltage exceeds 3V, the motor should use a separate power supply. 4.102 Appliances assembled with other appliances or equipped with other appliances shall be tested in accordance with the requirements of this standard. Other appliances should work simultaneously in accordance with the requirements of relevant standards.
4.103 Unless otherwise specified, the test conditions and requirements apply to both surfaces of the double-sided electric heating pan. 5 Ratings
This chapter in GB4706.1-92 is applicable. 6 Classification
Except for the following content, this chapter in GB4706.1-92 is applicable. 6.1 Add the following content to this article:
Add the following content to item (2):
Anti-spray appliances (IPX5, classified in accordance with IEC Publication 529: Degree of protection provided by the enclosure). This article adds the following content:
(3) Classification according to the degree of protection against temperature rise due to installation conditions: appliances installed in isolation;
Appliances installed in units of other appliances. There are currently no additional requirements for appliances installed in other appliance units. 7 mark
Except for the following content, this chapter in GB4706.1-92 is applicable. 7.6 This article adds the following content:
Add the following symbols to the symbol table:
I. Anti-jet structure
7.12 This article adds the following content:
GB4706.371997
should be provided with instructions, which should detail the special precautions required during installation, operating procedures and user maintenance, such as cleaning. Instructions should also be provided.
Appliances that are equipped with appliance input sockets and need to be partially or fully immersed in water during cleaning should be provided with instructions and should indicate that the connector must be removed before cleaning the appliance, and that the appliance must be input before being used again. Dry the socket. For appliances permanently connected to fixed wiring, the instructions should provide information on measures to be taken to protect against leakage currents during installation. If the appliance is not constructed to be spray-proof, clear and detailed instructions should be provided to the user along with the appliance. The instructions should state that this appliance must not be cleaned with a water spray hose.
The following clauses are added to this chapter:
7.101 When conducting the test in Chapter 11, if the temperature rise of the side wall and rear wall above the test corner baking plane exceeds 65K, the installation instructions provided by the manufacturer should Including the following content, this content should also be included on the temporary label attached to the appliance, such as a strapping type. “If appliances are placed close to walls, partitions, kitchen equipment, decorative coatings, etc., it is recommended that these equipment and facilities be made of non-flammable materials, otherwise they need to be covered with appropriate non-flammable insulation materials and the Pay close attention to the fire protection regulations. "8 Protection against electric shock | | tt | | This chapter in GB4706.1-92 is applicable. 9 Start-up of electric appliances
This chapter in GB4706.1-92 is applicable. 10 Input power and current
This chapter in GB4706.1-92 applies except for the following content. 10.1 This article adds the following content:
The total input power of multiple units can be determined by measuring the input power of each unit separately. The rated input power is the sum of the rated input powers of all individual components in the appliance that can be operated simultaneously; when there may be several such combinations, the combination with the largest input power is used to determine the rated input power. 11 Fever
Except for the following content, this chapter in GB4706.1-92 is applicable. 11.2 The following content is added to this article:
Appliances fixed to the floor shall be installed in accordance with the manufacturer's instructions. 11.4 This article is replaced by the following:
The appliance operates under sufficient heat dissipation conditions so that the total input power of the appliance is 1.15 times the rated input power. 11.7 This article is replaced by the following content
Let the appliance work until it reaches a stable state. 11.8 This article adds the following content:
For the back wall and side wall of the test corner, including the part protruding in front of the appliance, the 65K temperature rise limit only applies to below the baking plane. If the temperature rise limit is exceeded above the baking surface, the requirements of Article 7.101 apply. 12. This chapter in GB4706.1-92 is applicable when appliances with electric heating elements are operated under overload conditions. 13 Electrical insulation and leakage current at operating temperature Except for the following content, this chapter in GB4706.1-92 is applicable. 13.2 This article is revised with the following content; GB4706.37-1997
replaces the specified value of leakage current of fixed category I appliances with the following content:·Maximum mA/kW limit for appliances connected to cords and plugs 10mA;·Other appliances
This article adds the following content:
**...1mA/kW has no maximum limit.
When the appliance is equipped with Class 1 or Class II structural components, the leakage current of these components shall not exceed the values ??given in GB4706.1-92. 14 Suppression of radio and television interference
This chapter in GB4706.1-92 is applicable. 15 Waterproof
Except for the following content, this chapter in GB4706.192 is applicable. 15.2 The following content is added to this article:
Ordinary and drip-proof appliances also need to conduct splash tests using the device shown in Figure 10 in GB4706.1-92. Spray-proof appliances are subject to the tests described in IEC Publication No. 529 (IPX5). 15.3 This clause is amended to read as follows: The requirement is replaced by the following:
Appliances shall be constructed so that the spillage of liquids during normal use does not affect their electrical insulation. Replace the paragraph on the test specifications for liquid containers with the following: Pour one liter of cold water containing approximately 1% NaCl smoothly into the center of the heating plate of the electric heating pan within 1 minute. 15.4 This article is modified with the following content: replace the specified time with the following content:
The time the appliance is placed in the humid room (box) is 24 hours. The following content is added to this article:
If it is not possible to place the entire appliance in a humid chamber (box), the heating elements should be tested separately. 16 Insulation resistance and electrical strength
Except for the following content, this chapter in GB4706.1-92 is applicable. 16.2 This article is amended with the following content: replace the specified value of leakage current of fixed Class I appliances with the following content: ·Appliances connected by cords and plugs
·Other appliances
17 Overload protection
This chapter in GB4706.1-92 is applicable. 18 Durability
2mA/kW maximum limit 10mA;
2mA/kW no maximum limit.
Except for the following content, this chapter in GB4706.1-92 applies. 18.1 The following content is added to this article:
The test is only performed on the electric components of the appliance. 18.2 This article is revised with the following content: Replace the paragraph of test instructions in the table with the following content: The electric components of the appliance operate under normal load and 0.9 times the rated voltage for 48 hours. 19 Abnormal operation
GB4706.37-1997
Except for the following content, this chapter in GB4706.1-92 shall apply. 19.1 This article is amended with the following content: The applicable test is replaced by the following content: All appliances are tested in accordance with 19.4. ·Appliances with electric motors, if applicable, are tested in accordance with 19.6 and 19.7 to 19.10. 19.4 This clause is replaced by the following:
The appliance is tested under the conditions specified in Chapter 11, but the voltage shall be such that the input power is 1.24 times the rated input power, and any temperature used to limit the temperature during the test in Chapter 11 shall be Controller short circuit. If the appliance is equipped with more than one control unit, these controls shall be short-circuited in sequence. If a separate thermal circuit breaker is used so that it controls the same contactor as a thermostat, the following applies: to operate the appliance at rated voltage or at the upper end of the rated voltage range and normal load, if a sample contactor The sample contactor shall not short-circuit during the test if it has been proven to withstand 100,000 operating cycles (100,000 make and 100,000 break) under conditions equivalent to those actually occurring within the appliance. www.bzxz.net
20 Stability and mechanical hazards
This chapter in GB4706.1-92 is applicable. 21 Mechanical strength
This chapter in GB4706.1-92 is applicable.
22 structure
Except for the following content, this chapter in GB4706.1-92 is applicable. 22.1 This article is replaced by the following:
Appliances shall be of class\).
Conformity is determined by inspection and relevant tests. The following clause is added to this chapter:
22.101 Appliances shall be protected so that moisture and grease do not accumulate to an extent that affects the values ??of creepage distances and clearances, unless the values ??of creepage distances and clearances in 29.1 are increased 50%. Compliance shall be determined by inspection and measurement 22.102 The thermal circuit breaker shall be of the non-automatic reset free trip type, and compliance shall be determined by inspection and manual testing 23 Internal wiring
This chapter in GB4706.192 is applicable .
24 components
Except for the following content, this chapter in GB4706.1-92 is applicable. 1) For appliances that should use a three-phase five-wire power plug, if there is no applicable plug or socket in my country, the appliance is allowed to be classified as Class 01. The following provisions are added to this chapter:
GB4706.37—1997| |tt||24.101 The connector installed on the appliance shall not be equipped with a thermostat. Compliance is determined by inspection.
25 Power supply connection and external flexible cables and cords
Except for the following content, this chapter in GB4706.1--92 is applicable. The following content is added to this article in 25.2:||tt ||The design of fixedly installed appliances and appliances weighing more than 40kg but not equipped with rollers or casters should allow the appliance to be installed in accordance with the manufacturer's instructions and then connected to the power cord. 25.3 The following content is added to this article:||tt ||Ejection-proof appliances shall not be equipped with input sockets. 25.4 This article adds the following content:
Appliances delivered without cords should be connected with X
25.6 This article is amended with the following content: Replace the specified power cord type with the following content: The power cord shall be an oil-resistant flexible sheathed cable, not lighter than ordinary neoprene or other equivalent synthetic rubber sheathed softer cables. wire (code 245 in IEC57).
26 External conductor terminal block
This chapter in GB4706.1-92 is applicable.
27 Grounding Measures
Except for the following content, this chapter in GB4706.1-92 is applicable: 27.2 This article adds the following content:
Fixed appliances should be equipped with a Terminals for connecting external equipotential conductors. The terminal block shall maintain an effective electrical connection with all fixed exposed metal parts of the appliance and shall be able to be connected to conductors with a nominal cross-sectional area of ??less than 10 mm2. Terminals shall be placed at a location convenient for connection to the reinforced earth conductor after the appliance is installed. 28 Screws and wiring
This chapter in GB4706.1-92 is applicable.
9 Creepage distance, electrical clearance and penetration insulation distance 29
Except for the following content, this chapter in GB4706.1-92 is applicable. 29.1 The following content is added to this article:
See Article 22.101.
30 Heat resistance, flame resistance and tracking resistance
This chapter in GB4706.1-92 is applicable. 31 Anti-rust
This chapter in GB4706.1-92 is applicable. 2 Radiation, toxicity and similar hazards
32
This chapter in GB4706.1--92 is applicable. GB4706.37—1997
Attachment
The appendix contents in GB4706.1-92 are applicable. Record
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