Water circulation system for a pool and a pool

Abstract

A water circulation system for a pool comprises a water outlet assembly mounted to an inner wall of a pool, and in communication with an external pump through a water outlet pipe. The system also includes an air inlet assembly mounted to the pool a distance from the water outlet assembly, and an air outlet assembly attached to the water outlet assembly and in communication with the water outlet assembly. An air inlet passage connects the air inlet assembly to the air outlet assembly, so external air can enter the air inlet assembly and enter the water outlet assembly through the air outlet assembly. Air is introduced to the water outlet by the air outlet when the water outlet assembly is blocked, reducing negative pressure at the water outlet and reducing risk that a portion of a user's body is drawn against or into the water outlet.

What is claimed is: 
     
         1 . A pool, comprising:
 an inner wall defining a pool cavity;   an auxiliary suction assembly in communication with an external space;   a water inlet pipe to deliver water into the pool cavity;   a water outlet pipe to deliver water out of the pool cavity;   a water inlet assembly mounted on the inner wall and defining an inlet fluid passage between the pool cavity and the water inlet pipe; and   a water outlet device mounted on the inner wall and including:
 a body extending between a first end and a second end, the body defining an outlet fluid passage and having at least one through hole to provide communication between the auxiliary suction assembly and the outlet fluid passage; 
   wherein the first end of the body includes a plurality of water outlet orifices to provide communication between the pool cavity and the outlet fluid passage and the second end of the body is connected to the water outlet pipe.   
     
     
         2 . The pool according to  claim 1 , wherein the auxiliary suction assembly includes a shell fixed to the inner wall and including:
 a first wall disposed on the inner wall of the pool;   a second wall disposed opposite to the first wall;   a sidewall connected between the first wall and the second wall of the shell; and   an internal cavity defined by the first wall of the shell, the second wall of the shell and the sidewall of the shell;   wherein the at least one through hole of the water outlet device is disposed in the internal cavity of the shell.   
     
     
         3 . The pool according to  claim 2 , wherein the second wall of the shell includes a hole, the water outlet device is disposed through the hole of the second wall of the shell, and the body of the water outlet device is spaced apart from a periphery of the hole of the second wall of the shell to form an annular gap. 
     
     
         4 . The pool according to  claim 3 , further comprising:
 a filter including a connection interface removably mounted to the water outlet device over the plurality of the water outlet orifices of the water outlet assembly and blocking the at least one through hole of the water outlet device.   
     
     
         5 . The pool according to  claim 4 , wherein the body of the water outlet device includes external threads, and the connection interface of the filter includes internal threads engageable to the external threads of the body of the water outlet device. 
     
     
         6 . The pool according to  claim 5 , wherein the at least one through hole is provided on or adjacent to the external threads of the water outlet device and the connection interface of the filter blocks the at least one through hole of the water outlet devices when the internal threads of the connection interface of the filter engage to the external threads of the body of the water outlet device. 
     
     
         7 . The pool according to  claim 5 , further comprising:
 a water blocking member slidably coupled to the body of the water outlet device;   a biasing member disposed about the body of the water outlet device and having:
 a first end contacting the first wall of the shell of the auxiliary suction assembly; 
 a second end contacting the water blocking member; 
   wherein the water blocking member blocks the at least one through hole of the water outlet device when the water blocking member is pushed toward the first wall of the shell of the auxiliary suction assembly.   
     
     
         8 . The pool according to  claim 2 , wherein the shell of the auxiliary suction assembly further comprises at least one air inlet on the side wall of the shell of the auxiliary suction assembly. 
     
     
         9 . The pool according to  claim 8 , wherein the at least one air inlet is at least partially disposed above a desired in-use water level of the pool. 
     
     
         10 . The pool according to  claim 1 , wherein the auxiliary suction assembly includes:
 an air inlet assembly, including at least one air inlet in communication with external space;   an air outlet assembly disposed on the inner wall of the pool;   an air inlet passage including a first end connected to the air inlet assembly and a second end connected to the air outlet assembly.   
     
     
         11 . The pool according to  claim 10 , wherein the air outlet assembly includes a shell, the shell fixed to the inner wall and including:
 an internal cavity;   a first installation port connecting with the second end of the air inlet passage;   a second installation port accommodating the water outlet device,   wherein the at least one through hole of the water outlet device is disposed in the internal cavity of the shell of the air outlet assembly.   
     
     
         12 . The pool according to  claim 11 , wherein the shell of the air outlet assembly includes:
 a first wall disposed on the inner wall of the pool;   a second wall disposed opposite to the first wall of the shell of the air outlet assembly and having a recessed portion at the second installation port;   wherein the internal cavity of the shell defined by the first wall of the shell and the second wall of the shell, and the water outlet device is disposed in the recessed portion of the second wall of the shell.   
     
     
         13 . The pool according to  claim 12 , wherein the recessed portion of the second wall of the air outlet assembly includes an annular wall provided with an opening or air holes. 
     
     
         14 . The pool according to  claim 13 , wherein the body of the water outlet device is spaced apart from the annular wall of the recessed portion of the shell to form a gap. 
     
     
         15 . The pool according to  claim 14 , further comprising a filter including a connection interface removably mounted to the water outlet device over the plurality of the water outlet orifices of the water outlet assembly and blocking the at least one through hole. 
     
     
         16 . The pool according to  claim 15 , wherein the body of the water outlet device includes external threads, and the connection interface of the filter includes internal threads engageable to the external threads of the body of the water outlet device. 
     
     
         17 . The pool according to  claim 16 , wherein the at least one through hole is provided on or adjacent to the external threads of the water outlet device and the connection interface of the filter blocks the at least one through hole of the water outlet devices when internal threads of the connection interface of the filter engage to the external threads of the water outlet device. 
     
     
         18 . The pool according to  claim 11 , wherein the shell of the air outlet assembly includes:
 a first wall disposed on the inner wall of the pool;   a second wall disposed opposite to the first wall of the shell of the air outlet assembly and having a hole at the second installation port;   wherein the internal cavity of the shell defined by the first wall of the shell and the second wall of the shell, the water outlet device is disposed through the hole of the second wall of the shell, and an annular gap is formed between a periphery of the hole of the second wall of the shell and the middle section of the water outlet device.   
     
     
         19 . The pool according to  claim 18 , further comprising a filter including a connection interface removably mounted to the water outlet device over the plurality of the water outlet orifices. 
     
     
         20 . The pool according to  claim 19 , wherein the middle section of the water outlet device includes external threads, and the connection interface of the filter includes internal threads engageable to the external threads of the water outlet device. 
     
     
         21 . The pool according to  claim 20 , further comprising:
 a water blocking member translatably coupled to the body of the water outlet device   a biasing member disposed about the body of the water outlet device and having:
 a first end, abutting against the first wall of the shell of the auxiliary suction assembly; 
 a second end, abutting against the water blocking member; 
   wherein the water blocking member blocks the at least one through hole when the water blocking member is pushed toward the first wall of the shell of air outlet assembly.   
     
     
         22 . The pool according to  claim 10 , wherein the pool further comprises:
 a top wall;   a bottom wall;   an outer wall disposed opposite to the inner wall of the pool;   an inflatable chamber defined by the outer wall of the pool, the inner wall of the pool, the top wall of the pool and the bottom wall of the pool.   wherein the air inlet passage disposed in the inflatable chamber of the pool.