You can't control Google Chrome as an object in VBscript. Here's why: VBScript CreateObject Google Chrome
That being said, you CAN still manipulate a refresh on google chrome. Just copy the title of the page you want refreshing, and once the page has been activated, use a SendKeys command to cause it to refresh. e.g.(CTRL+R) - causes refresh, or in Sendkeys ("^r").
Once you've got it refreshing, just set it in a loop and set your wait period for however long you want.
'This is an infinite loop, only disposed of by exiting Wscript.exe or Cscript.exe
Do While(true)
Dim PageTitleToRefresh, IntervalinSeconds, x, objShell, Success
'Page Titles - NOT the page address - (google.com = NO) (Google = YES)
'Page Titles are normally stored at the top of the browser or in the tab name of the browser.
PageTitleToRefresh = "Google"
IntervalinSeconds = 10
x = IntervalinSeconds * 1000
Set objShell = WScript.CreateObject("WScript.Shell")
Do Until Success = True
Success = objShell.AppActivate(PageTitleToRefresh)
Wscript.Sleep 1000
Loop
wscript.echo "Activated, now refreshing"
objShell.SendKeys "^r"
Wscript.Sleep IntervalinSeconds
Loop