Abstract: A surfboard is provided, which may include a first air chamber, a second air chamber, and a partition arranged between the first air chamber and the second air chamber. The partition may comprise: a first connecting portion connected to a top wall of the first air chamber and to a top wall of the second air chamber; a second connecting portion connected to a bottom wall of the first air chamber and to a bottom wall of the second air chamber; and an intermediate portion extending between the first connecting portion and the second connecting portion.

Abstract: An inflatable bed is provided, comprising: a first piece, a middle piece having a middle master piece and an oblique ring piece having an inner edge connected to the middle master piece, and a second piece; a first lateral piece connected to the first piece and to an outer edge of the oblique ring piece; and a second lateral piece connected to the middle piece and to the second piece. A first air chamber is defined by the first piece, the middle piece, and the first lateral piece. A second air chamber is defined by the middle piece, the second piece, and the second lateral piece.

Abstract: An air pump is delineated for an inflatable product that can be selectively connected thereto. The inflatable product includes a shell located on a side wall. The shell includes an internal chamber for selective placement of the air pump and an air valve for selective communication with the air pump. When the air pump is located in the internal chamber it can be moved to switch between a first position and a second position. The air pump includes an air inlet and an air outlet such that the air inlet is in communication with the air valve in the first position to deflate the inflatable product and the air outlet is in communication with the air valve in the second position to inflate the inflatable product. The air pump can also be used externally via manual connection between the air inlet or the air outlet and other inflatable products.

Abstract: A thermal insulation cover for a pool, and an above-ground pool are provided. The thermal insulation cover comprises: a side wall portion, which is annular and is adapted to surround a wall of a pool; and a top cover portion comprising an outer circumference connected to a top circumference of the side wall portion. Each of the side wall portion and the top cover portion comprises an outer layer, an inner layer, and a filling layer disposed between the outer layer and the inner layer. The filling layer may be polyester batting.

Abstract: Disclosed is an apparatus for manufacturing an internal tension member of an inflatable product, the apparatus comprising: a support frame; a base plate arranged to pass through the inside of the support frame; a base strip conveying device comprising two inner base strip reels, two outer base strip reels and a traction wheel; a wire winding device comprising a rotation device around the base plate and wire winding guide shafts symmetrically arranged on two sides of the base plate, the rotation device winding a wire on two inner base strips; and a welding device between the wire winding device and the traction wheel, the welding device welding the two inner base strips to the corresponding two outer base strips. Further disclosed are a method for manufacturing an internal tension member of an inflatable product, an internal tension member of an inflatable product, and an inflatable product.

Abstract: An inflatable stand-up paddle board is provided including: a body including a top sheet, a bottom sheet, and an outer sheet defining an inflatable chamber. The board further includes an inner sheet defining an installation space spaced apart from the inflatable chamber by the inner sheet. An air pump assembly is disposed in the installation space and includes: a casing, and an air pump including an air inlet that communicates with an exterior of the inflatable chamber, and an air outlet that communicates with the inflatable chamber via a first vent hole in the inner sheet.

Abstract: A pressure relief valve for an inflatable device, and an inflatable pool including the pressure relief valve are provided. The pressure relief valve includes: a valve seat configured to connect to the inflatable device; and a valve body. The valve body is disposed at least partially within the valve seat and includes a valve shell, comprising a vent hole therein, and a valve diaphragm arranged at a bottom of the valve shell. The valve diaphragm is moveable between a closed position in which the vent hole is closed and an open position in which the vent hole is open. The valve body further includes a spring and a valve diaphragm fixing part arranged around the vent hole. The valve shell and the valve diaphragm fixing part are connected to each other, and the spring is biased to push the valve diaphragm into the closed position.

Abstract: A water spraying device and an above-ground pool including the water spraying device are provided. The water spraying device includes: a sprayer assembly having a water inlet end, a water outlet end, and a first magnetic element disposed on the water inlet end; and a mounting assembly including a first end, a second end in fluid communication with the first end, and a second magnetic element disposed on the first end of the mounting assembly. The mounting assembly defines therein a water passage to the sprayer assembly. The first magnetic element is mutually attractive to the second magnetic element such that the water inlet end of the sprayer assembly and the first end of the mounting assembly are detachably connectable via the first magnetic element and the second magnetic element.

Abstract: An above-ground pool is provided including a base; a surrounding wall joined to the base; and a pool liner, detachably connected to an inner side of the surrounding wall, the pool liner defining a water storage space therein. A support assembly of the pool comprises: horizontal and vertical support members, first connecting members, each connecting an upper end of one of the vertical support members to two of the horizontal support members, and second connecting members, each connecting a lower end of one of the vertical support members to the base. Each of the first connecting members has a first insertion slot having a shape corresponding to one of the vertical support members. Each of the second connecting members has a second insertion slot having a shape corresponding to one of the vertical support members.

Abstract: A spa pool is provided including a pool body, the pool body including a pool bottom and a pool wall together defining a water cavity. The spa pool further includes: an inflatable seat defining therein a second air chamber and disposed in the water cavity; a first nozzle assembly, wherein at least a part of the first nozzle assembly is accommodated within the inflatable seat, and a first end of the first nozzle assembly is in fluid communication with the water cavity. The pool body further includes a fluid pipeline disposed in the first air chamber, the fluid pipeline being in fluid communication with a second end of the first nozzle assembly, so that the first nozzle assembly provides fluid communication between the water cavity and the fluid pipeline.

Abstract: An above-ground pool includes a pool bottom and a pool wall, together defining a water storage space. The pool bottom includes a lower bottom sheet connected to the pool wall and an upper bottom sheet, the upper and lower bottom sheets connected in a ring region and defining a sandwich region. A porous elastic material is disposed between the upper bottom sheet and the lower bottom sheet in the sandwich region. A water drainage device includes a water drainage valve and a water drainage pipe, and the water drainage valve penetrates through the pool bottom and connects to the water drainage pipe beneath the pool bottom. A vent hole through the lower bottom sheet, and located in a region where the pool bottom is lifted by the water drainage pipe, provides communication between the porous elastic material and an exterior of the 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.

Abstract: A water circulation system for a pool comprises a water outlet assembly mounted to an inner wall of a pool, and in fluid communication with an external pump through a water outlet pipe. The water circulation system also includes an air inlet assembly mounted to the pool a preset distance from the water outlet assembly, and an air outlet assembly attached to the water outlet assembly and in fluid 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 be introduced to 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.

Abstract: The present utility model relates to an inflatable bed, comprising: a top sheet provided with at least one through hole; a bottom sheet; a lateral confining sheet, an upper edge of the lateral confining sheet being connected to an outer edge of the top sheet, and a lower edge of the lateral confining sheet being connected to an outer edge of the bottom sheet; and at least one tensioning member, the tensioning member comprising: a upper tensioning part, comprising a upper side wall and a bottom, an upper edge of the upper side wall being connected to a periphery of the through hole of the top sheet, so that the upper side wall fits the through hole of the top sheet, and a lower edge of the upper side wall being connected to the bottom; and a lower tensioning part for connecting the bottom of the upper tensioning part to the bottom sheet to form a tensioning effect at least between the bottom of the upper tensioning part and the bottom sheet; wherein the upper tensioning part of the tensioning member, the top s

Abstract: An air pump is delineated for an inflatable product that can be selectively connected thereto. The inflatable product includes a shell located on a side wall. The shell includes an internal chamber for selective placement of the air pump and an air valve for selective communication with the air pump. When the air pump is located in the internal chamber it can be moved to switch between a first position and a second position. The air pump includes an air inlet and an air outlet such that the air inlet is in communication with the air valve in the first position to deflate the inflatable product and the air outlet is in communication with the air valve in the second position to inflate the inflatable product. The air pump can also be used externally via manual connection between the air inlet or the air outlet and other inflatable products.

Abstract: An air pump is delineated for an inflatable product that can be selectively connected thereto. The inflatable product includes a shell located on a side wall. The shell includes an internal chamber for selective placement of the air pump and an air valve for selective communication with the air pump. When the air pump is located in the internal chamber it can be moved to switch between a first position and a second position. The air pump includes an air inlet and an air outlet such that the air inlet is in communication with the air valve in the first position to deflate the inflatable product and the air outlet is in communication with the air valve in the second position to inflate the inflatable product. The air pump can also be used externally via manual connection between the air inlet or the air outlet and other inflatable products.

Abstract: An air pump is provided, the air pump comprising: an air pump housing; a first check valve; a main air pump; an airway switching device; an air-supplementing pump; an air pressure sensor; and a control device. The control device is electrically connected to the main air pump, the airway switching device, the air-supplementing pump, and the air pressure sensor, and is configured to: send a main air pump stop signal based on the air pressure sensor detecting a threshold pressure in the inflatable body during operation of the main air pump; and send an air-supplementing pump operation signal based on the air pressure sensor detecting a pressure lower than the threshold pressure in the inflatable body when the main air pump is not in operation.

Abstract: A PTC liquid heating device comprises a housing extending along a longitudinal axis and defining a liquid inlet and a liquid outlet. A PTC heating unit is inserted into the housing and extends along the longitudinal axis. The PTC heating unit includes a sleeve, a heat conductor and at least one PTC heating core. The heat conductor has a pair of metal profiles defining at least one chamber, the at least one chamber extending along the longitudinal axis to receive the at least one PTC heating core. The heat conductor is located in the sleeve and has a shape matching the sleeve. The PTC liquid heating device provides uniform and efficient heat transfer. In addition, the PTC liquid heating device has improved corrosion resistance and insulation properties, thereby prolonging the service life of the PTC liquid heating device.

Abstract: A constant pressure valve for an inflatable product is provided. The constant pressure valve comprises: a housing defining an airflow channel within. A first sealing seat is disposed in the airflow channel and a first through hole is formed in the first sealing seat. An inflation valve core comprises: a first actuating assembly and a first valve head. The first actuating assembly is configured to drive the first valve head to disengage from the first through hole, or to engage with the first through hole in a sealing manner. The constant pressure valve is switchable between an inflation state, in which the first valve head is disengaged from the first through hole, and the airflow channel is unblocked; and a cut-off state in which the first valve head is engaged with the first through hole in a sealing manner, and the airflow channel is blocked by the first valve head.

Abstract: A thermal insulation cover for a pool, and an above-ground pool are provided. The thermal insulation cover comprises: a side wall portion, which is annular and is adapted to surround a wall of a pool; and a top cover portion comprising an outer circumference connected to a top circumference of the side wall portion. Each of the side wall portion and the top cover portion comprises an outer layer, an inner layer, and a filling layer disposed between the outer layer and the inner layer. The filling layer may be polyester batting.