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: 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: 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.

Abstract: An inflatable pool includes a pool wall and a pool bottom which define a fluid accommodation cavity. The pool wall includes an inflatable chamber, and the pool bottom includes an outer bottom sheet and an inner bottom sheet. The inflatable pool further includes a wave-making channel arranged at the pool bottom and formed by enclosing strip strip connected to the inner bottom sheet and the outer bottom sheet respectively. The inner bottom sheet includes an inner annular rim connected to the outer bottom sheet to form the annular wave-making channel, and an outer annular rim of the inner bottom sheet is connected to the strip to form an overlapping region. Holes are formed through the overlapping region, and the wave-making channel is in fluid communication with the fluid accommodation cavity via the holes.

Abstract: A recreational water slide device is provided including an upper sheet and a lower sheet, together defining an inflatable chamber. A connecting sheet is disposed under the inflatable chamber and comprises an edge that is connected to the lower sheet. A water storage chamber is formed between the connecting sheet and the lower sheet with an opening, through which water can pass, between the inflatable chamber and the connecting sheet.

Abstract: An inflatable pool is provided, including an inflatable pool body including an inner wall, an outer wall and a bottom wall. The inner wall and the bottom wall define a water storage space, the inner wall and the outer wall form an inflatable chamber, and a cavity is defined between the inner wall and the outer wall. The inflatable pool further includes a pump device; a pool body connecting pipe including an inner end in communication with the water storage space and an outer end disposed within the cavity; and a pump connecting pipe including an outer end connected to the pump device, and an inner end including a connector detachably connected to the outer end of the pool body connecting pipe. A junction between the pool body connecting pipe and the pump connecting pipe is disposed within the cavity.

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: An inflatable product is provided, comprising: an inflatable chamber defined by a chamber wall; a tensioning member disposed in the inflatable chamber; and a connecting member disposed in the inflatable chamber. The connecting member includes a covering layer and a fiber layer disposed between the chamber wall and the covering layer. The tensioning member is sewn to the connecting member, and the connecting member is connected to the chamber wall.

Abstract: A drainage device for an above-ground pool, and an above-ground pool including the drainage device are provided. The drainage device includes a drainage pipe, with inlet and outlet ends, and a drainage valve connected to the inlet end of the drainage pipe. The drainage valve includes a water inlet periphery, defining a water inlet in fluid communication with the inlet end of the drainage pipe, and a connecting member disposed circumferentially around the water inlet periphery. The connecting member is radially spaced apart from the water inlet periphery. The connecting member may be formed by injection molding around the water inlet periphery.

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 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 built-in electric air pump, adapted to be attached to an inflatable body, is provided. The built-in electric air pump includes a pump housing defining therein an accommodating cavity; a pump cover and a switching device disposed in the accommodating cavity; an air valve in fluid communication with the switching device; and an operating switch operably connected to the switching device. The operating switch is configured to drive the switching device to switch between a first position in which the pump is in an inflation state and a second position in which the pump is in an exhaust state. The built-in electric air pump further comprises a press-fit element, disposed in the accommodating cavity and including a first end biased to press against the first limiting structure, and a second end biased to press against the pump housing, such that the press-fit element and the pump housing limit a position of the pump cover in the accommodating cavity.

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: 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 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.