Abstract: An airbed is provided with an inflation and deflation valve, which includes a base fixedly disposed at an inflation and deflation port and a sealing plug detachably disposed on the base. The airbed has an electric air pump is part of the sealing plug and is integrated with the sealing plug. A housing of the electric air pump is used as part of the inflation and deflation valve of the airbed and serves as the sealing plug of the inflation and deflation valve. When the airbed needs to be deflated, the electric air pump is directly removed, and then air is rapidly exhausted through a large diameter exhaust port. The airbed can be produced in advance without being limited by the specification of the electric air pump, and afterwards, the electric air pump is screwed or buckled on the airbed in a sealed manner.

Abstract: A non-inflation massaging pool comprises a pool bottom and a pool wall connected to the periphery of the pool bottom. The pool sidewall is of a two-layered structure and comprises an inner wall and an outer wall, and interior space is formed between the inner wall and the outer wall, and the interior space is filled with a pool frame. The pool is durable and easy for installation and transport.

Abstract: The present invention involves a type of small-sized pool and PTC heater for liquid heating. The PTC heating component of PTC heater is composed of several heating cores made of PTC ceramic material, completely eliminating fire risk. Meanwhile, PTC heating component external is equipped with at least one layer of insulation and sealing component, which further includes several insulation layers and at least one sealing layer outside the insulation layer, effectively eliminating electricity leakage risk. Two layers of above mentioned insulation and sealing component could meet the insulation requirements specified in IEC standard and UL standard, so it could be used for applications with large power. In addition, the PTC heater has good water route sealing ability, so it could be used for liquid heating in small size pool. The small-sized pool is equipped with PTC heater with several layers of insulation and sealing for liquid heating, safe and reliable.

Abstract: The present invention involves a type of small-sized pool and PTC heater for liquid heating. The PTC heating component of PTC heater is composed of several heating cores made of PTC ceramic material, completely eliminating fire risk. Meanwhile, PTC heating component external is equipped with at least one layer of insulation and sealing component, which further includes several insulation layers and at least one sealing layer outside the insulation layer, effectively eliminating electricity leakage risk. Two layers of above mentioned insulation and sealing component could meet the insulation requirements specified in IEC standard and UL standard, so it could be used for applications with large power. In addition, the PTC heater has good water route sealing ability, so it could be used for liquid heating in small size pool. The small-sized pool is equipped with PTC heater with several layers of insulation and sealing for liquid heating, safe and reliable.