Multi-vessel spas

Abstract

A spa system with multiple vessels to handle water leakage while preventing damage to the spa system. In one implementation, a spa system includes a first vessel configured to hold water and one or more persons, and a second vessel attached to the first vessel. The second vessel has a pressurized cavity for water. The system includes a water jet connected between the first and second vessels, in which the water jet is configured to use water pressure in the pressurized cavity to send water from the second vessel into the first vessel. The system also has a watertight seal around a water jet connection, in which the water jet is positioned to allow water leakage between the first and second vessels upon a watertight seal failure. In some implementations, the first and second vessels are twin-sheet bonded and embedded channels are used for air and water circulation.

1 . A system for a spa comprising: 
 a first vessel configured to hold water and one or more persons;    a second vessel attached to the first vessel, wherein the second vessel comprises a pressurized cavity for water;    a water jet connected between the first and second vessels, wherein the water jet is configured to use water pressure in the pressurized cavity to send water from the second vessel into the first vessel; and    a watertight seal around a water jet connection, wherein the water jet can allow water leakage between the first and second vessels.    
   
   
       2 . The system in accordance with  claim 1 , further comprising a water pump to pressurize the pressurized cavity.  
   
   
       3 . The system in accordance with  claim 2 , wherein the second vessel is configured to hold the entirety of a bottom of a shell of the first vessel and sidewalls of the shell of the first vessel.  
   
   
       4 . The system in accordance with  claim 3 , wherein the system is configured to allow water leakage between the first and second vessels in a location around the water jet connection if the watertight seal fails.  
   
   
       5 . The system in accordance with  claim 3 , wherein a plurality of openings are in the shell of the first vessel.  
   
   
       6 . The system in accordance with  claim 2 , wherein the first and second vessels are connected to a circulation system comprising tubes, pipes, and connectors.  
   
   
       7 . The system in accordance with  claim 6 , wherein the circulation system further comprises a plurality of water jets in at least one opening in a shell of the first vessel.  
   
   
       8 . The system in accordance with  claim 1 , further comprising a water jet nozzle that adjusts a force of water sent into the first vessel by adjusting a water jet nozzle aperture.  
   
   
       9 . The system in accordance with  claim 1 , further comprising a manual adjustment apparatus to facilitate manual adjustment of water pressure of the second vessel.  
   
   
       10 . The system in accordance with  claim 1 , further comprising an electronic adjustment apparatus to adjust water pressure of the second vessel.  
   
   
       11 . The system in accordance with  claim 1 , wherein the water jet comprises a nozzle responsive to an adjustment in water pressure.  
   
   
       12 . The system in accordance with  claim 1 , wherein the attachment between the first and second vessels comprises a twin-sheet bond.  
   
   
       13 . The system in accordance with  claim 1 , further comprising: 
 a plurality of vessels attached to the first vessel, wherein each of the plurality of vessels comprises a pressurized cavity for water;    one or more water jets connected between the first vessel and the plurality of vessels, wherein the one or more water jets are configured to use water pressure in each of the pressurized cavities of the plurality of vessels to send water from the plurality of vessels into the first vessel; and    a watertight seal around each of one or more water jet connections, wherein each water jet is positioned to allow water leakage between the first and the plurality of vessels upon a watertight seal failure.    
   
   
       14 . A spa system comprising: 
 a first vessel configured to hold water;    a second vessel configured to substantially hold the first vessel, the second vessel further being configured to hold pressurized water;    a circulation system comprising at least one water jet, wherein the water jet is positioned between the first and second vessels and is configured to use water pressure in the second vessel to send water into the first vessel; and    a watertight seal around a connection of the water jet, wherein the first and second vessels are positioned to receive leaking water upon a malfunctioning of the watertight seal.    
   
   
       15 . The spa system in accordance with  claim 14 , wherein substantially holding the first vessel comprises the first vessel being substantially located inside the second vessel.  
   
   
       16 . The spa system in accordance with  claim 15 , further comprising an adjustment apparatus to adjust water pressure of the second vessel.  
   
   
       17 . The spa system in accordance with  claim 15 , further comprising an air injecting apparatus to increase water pressure in the second vessel.  
   
   
       18 . The spa system in accordance with  claim 14 , wherein the water jet comprises an aperture operable to adjust a force of water sent into the first vessel.  
   
   
       19 . The spa system in accordance with  claim 18 , wherein the aperture is configured to be responsive to a water pressure adjustment apparatus.  
   
   
       20 . The spa system in accordance with  claim 14 , further comprising a water pump to pressurize the water in the second vessel.  
   
   
       21 . A method to prevent damage in a spa upon a failure of a watertight seal, the method comprising: 
 attaching a water pump to the spa;    attaching a first vessel with a second vessel, wherein the first vessel is configured to hold water for the spa, and wherein the second vessel is configured to hold water in a pressurized cavity, wherein the water pump is configured to pressurize water in the cavity of the second vessel;    connecting a water jet between the first and second vessels, wherein the connecting comprises attaching the watertight seal at a water jet connection; and    using water pressure in the pressurized cavity to send water from the second vessel into the first vessel with the water jet, and wherein the watertight seal is configured such that water leaks between the first and second vessels if the watertight seal fails.    
   
   
       22 . The method in accordance with  claim 21 , wherein the attaching of the first and second vessels comprises any of sonic welding the first and second vessels, solvent welding the first and second vessels, and mechanically fastening the first and second vessels.  
   
   
       23 . The method in accordance with  claim 22 , wherein the forming of the first and second vessels comprises a plastic material, wherein the method further comprises reinforcing the first and second vessels with a plastic strengthening agent.  
   
   
       24 . The method in accordance with  claim 21 , wherein the attaching the first vessel with the second vessel comprises a twin-sheet bonding process.  
   
   
       25 . The method in accordance with  claim 24 , wherein the twin-sheet bonding process comprises: 
 bonding the first vessel with the second vessel; and    providing one or more openings between first and second vessels for air and water circulation.    
   
   
       26 . The method in accordance with  claim 21 , further comprising forming a plurality of plumbing openings in the first vessel.  
   
   
       27 . A system for a spa comprising: 
 a first vessel configured to hold water and one or more persons;    a second vessel attached to the first vessel, wherein the attachment comprises a twin-sheet bond between the first vessel with the second vessel; and    embedded channels between the first and second vessels for air and water circulation in the spa.    
   
   
       28 . The system in accordance with  claim 27 , wherein a contour of an outer vessel wall at an area of the embedded channels protrudes outward from a sitting area of the spa.  
   
   
       29 . The system in accordance with  claim 27 , wherein the embedded channels are effectively shrink-wrapped between the first and second vessels.