Redis Redis clear cache ?

I am using redis (option 22) for my Wordpress site. I wonder how to automatically clear the cache by a given time period. (For example, I want my views every four hours to be updated once.)

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I see the "wp_is_mobile ()" function wordpress does not work with redis. For example, just delete the cache, which device first accessed (PC, Mobile) it will save html that device and distribute it to all remaining users. (For example, computer ads will be displayed on mobile devices.)
#My default

Code:

# Block nginx-help log from public viewing
location ~* /wp-content/uploads/nginx-helper/ { deny all; }

set $skip_cache 0;

# exclude mobile devices from redis caching
#if ($redis_device = mobile) { set $skip_cache 1; }

# POST requests and urls with a query string should always go to PHP
if ($request_method = POST) {
  set $skip_cache 1;
}

if ($query_string != "") {
  set $skip_cache 1;
}

# Don't cache uris containing the following segments
if ($request_uri ~* "\?add-to-cart=|/cart/|/my-account/|/checkout/|/shop/checkout/|/store/checkout/|/customer-dashboard/|/addons/|/wp-admin/|/xmlrpc.php|wp-.*.php|/feed/|index.php|sitemap(_index)?.xml") {
  set $skip_cache 1;
}

# Don't use the cache for logged in users or recent commenters
if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in|edd_items_in_cart|woocommerce_items_in_cart|woocommerce_cart_hash|woocommerce_recently_viewed|wc_session_cookie_HASH|wp_woocommerce_session_|wptouch_switch_toggle") {
  set $skip_cache 1;
}

# bypass cache for woocommerce
if ($arg_add-to-cart != "") {
  set $skip_cache 1;
}

## bypass cache for empty woocommerce carts
#if ($cookie_woocommerce_items_in_cart != "0") {
#  set $skip_cache 1;
#}

location /redis-fetch {
  internal  ;
  set  $redis_key $args;
  redis_pass  redisbackend;
  redis_connect_timeout 60000;
  redis_read_timeout 60000;
  redis_send_timeout 60000;
}

location /redis-store {
  internal  ;
  set_unescape_uri $key $arg_key ;
  redis2_query set $key $echo_request_body;
  redis2_query expire $key 6h;
  redis2_pass  redisbackend;
  redis2_connect_timeout 60s;
  redis2_read_timeout 60s;
  redis2_send_timeout 60s;
}

location /redis-store-shortttl {
  internal  ;
  set_unescape_uri $key $arg_key ;
  redis2_query set $key $echo_request_body;
  redis2_query expire $key 3600;
  redis2_pass  redisbackend;
  redis2_connect_timeout 60s;
  redis2_read_timeout 60s;
  redis2_send_timeout 60s;
}