感谢Jay Gray的评论，在此较早的帖子中使用hoursAvailable的解决方案似乎可以正常工作。使用Google的测试工具进行了测试：

原始帖子：JSON-LD中的Schema.org OpeningHoursSpecification中包含“午休”

原始帖子中的代码：

{
"@context": "http://schema.org",
"@type": "Service",
"url": "http://www.example.com/",
"hoursAvailable": [{
    "@type": "OpeningHoursSpecification",
    "opens": "08:00",
    "closes": "13:00",
    "dayOfWeek": [{
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Monday",
        "name": "Monday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Tuesday",
        "name": "Tuesday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Wednesday",
        "name": "Wednesday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Thursday",
        "name": "Thursday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Friday",
        "name": "Friday"
    }]
},
{
    "@type": "OpeningHoursSpecification",
    "opens": "15:00",
    "closes": "20:00",
    "dayOfWeek": [{
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Monday",
        "name": "Monday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Tuesday",
        "name": "Tuesday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Wednesday",
        "name": "Wednesday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Thursday",
        "name": "Thursday"
    },
    {
        "@type": "DayOfWeek",
        "@id": "http://schema.org/Friday",
        "name": "Friday"
    }]
}]

}