Abstract: A protection device for an oil-smoke sensor has a protection housing having two ends and an inner chamber; the first end having a first opening for receiving a probe of the oil-smoke sensor and in communication with the inner chamber; a second opening is disposed on the second end which is opposite to the first opening and in communication with the inner chamber. Because the probe is sealing mounted in the first opening, the probe will not be directly exposed in oil-smoke flow. The protective device is mounted such that the axial direction of the protective device is vertical to the oil-smoke flow direction. Therefore, the inner chamber of the protection housing has a pressure with respect to the oil-smoke flow that tangentially flows at a high speed, and the oil-smoke can only be diffused into the protection housing, thus, the probe is much less likely to be contaminated.

Abstract: The present invention discloses a lifting mechanism for a moving component of a range hood and a range hood with the same, which comprises a mounting frame, a moving component, a motor, a transmission mechanism, two lifting rods, a connecting member and two guide rails. The transmission mechanism moves the connecting member up and down along the guide rails, so that the lifting rods and the moving component are allowed to move up and down. The power for the lifting motion is provided by the transmission mechanism, the guide rails on two sides ensure the stability of the lifting motion, and the lifting rods fixed on two sides of the connecting member further transfers the motion downward to the smoke guide plate, so that the lifting motion of the smoke guide plate is very stable.

Abstract: The present invention discloses a contactless control device for a range hood and a control method thereof. The contactless control device comprises two sets of infrared gesture sensing devices disposed on the housing of the range hood, and a detected signal analysis device. Each set of infrared gesture sensing devices comprises one infrared receiving device and at least one infrared transmitting device. The distance L between two infrared receiving devices meets the following condition: H*tan(?)+H*tan(?)+W_min<L<H*tan(?)+H*tan(?)+W_max. It is unnecessary to control the user's gesture sensing distance according to the intensity of the infrared transmitted signals. In this way, it is convenient to adjust the intensity of the infrared transmitted signals, and the infrared receiving device can better detect infrared signals.

Abstract: The present invention discloses an intelligent range hood and a control method thereof, which comprises a housing, a fan (4), a smoke collecting hood (3), a smoke guide plate (6), a controller and a sensor (8) for detecting concentration of smoke and/or vapor inside or outside the housing. The sensor (8) outputs an electrical signal to the controller; and, the controller controls rotation speed of the fan motor (5) and position of the smoke guide plate (6) according to the signal received from the sensor (8). The controller not only can automatically adjust the rotation speed of the fan motor (5) so as to allow the air volume of the fan (4) to adapt to the working condition of the range hood in real time, but also can adjust the air inlet area and the distance between the negative pressure region and the smoke source by moving the smoke guide plate (6) up and down, so as to adapt the change in the working condition.

Abstract: The present invention discloses a contactless control device for a range hood and a control method thereof. The contactless control device comprises two sets of infrared gesture sensing devices disposed on the housing of the range hood, and a detected signal analysis device. Each set of infrared gesture sensing devices comprises one infrared receiving device and at least one infrared transmitting device. The distance L between two infrared receiving devices meets the following condition: H*tan(?)+H*tan(?)+W_min<L<H*tan(?)+H*tan(?)+W_max. It is unnecessary to control the user's gesture sensing distance according to the intensity of the infrared transmitted signals. In this way, it is convenient to adjust the intensity of the infrared transmitted signals, and the infrared receiving device can better detect infrared signals.

Abstract: A protection device for an oil-smoke sensor has a protection housing having two ends and an inner chamber; the first end having a first opening for receiving a probe of the oil-smoke sensor and in communication with the inner chamber; a second opening is disposed on the second end which is opposite to the first opening and in communication with the inner chamber. Because the probe is sealing mounted in the first opening, the probe will not be directly exposed in oil-smoke flow. The protective device is mounted such that the axial direction of the protective device is vertical to the oil-smoke flow direction. Therefore, the inner chamber of the protection housing has a pressure with respect to the oil-smoke flow that tangentially flows at a high speed, and the oil-smoke can only be diffused into the protection housing, thus, the probe is much less likely to be contaminated.

Abstract: A protection device for an oil-smoke sensor comprises a protection housing (1) having a first end, a second end, and an inner chamber (2); the first end having a first opening (3) for receiving a probe (5) of the oil-smoke sensor and in communication with the inner chamber (2); a second opening (4) is disposed on the second end which is opposite to the first opening (3) and in communication with the inner chamber (2). Because the probe (5) is sealing mounted in the first opening (3), the probe (5) will not be directly exposed in oil-smoke flow. When in use, the protective device is mounted in a manner that the axial direction of the protective device is vertical to the oil-smoke flow direction.

Abstract: A real-time fume concentration monitoring system includes an electrical box having a closed internal space, wherein a divider is disposed within the electrical box so that the internal space of the electrical box is divided into a first chamber and a second chamber; a signal emitting unit is disposed within the first chamber, and a signal receiving unit is disposed within the second chamber; a portion of the electrical box corresponding to a signal emitting portion of the signal emitting unit and signal receiving unit is a light-transmitting region; a signal output terminal of the signal receiving unit is connected to a data processing unit. By detecting the fume concentration in a contactless manner, power consumption is low, the energy efficiency demand for the whole machine in the standby state is satisfied, and the signal detection sensitivity is high.

Abstract: An open water pump comprises an upper casing, a lower casing, an impeller having a central shaft and a plurality of blades. Each blade has an upper portion and a lower portion. The upper casing has an upper chamber, the lower casing has a lower chamber. A plurality of inlets attached below and to a side of the lower casing, and a plurality of outlets attached to a side of the upper casing. At least the bottom portion of the lower portion of each blade which attached to the shaft gradually bends along a rotation direction of the impeller, and a ratio of a height of the lower portion of each blade to a height of the upper portion is between 1 and 5. The impeller can be allowed to draw water at a low water level, foam formed by washing liquid or food debris on the surface of water can be less likely to get into the impeller to influence the drawing of water, a sufficient amount of water can be drawn from the water inlets.

Abstract: The present invention discloses a lifting mechanism for a moving component of a range hood and a range hood with the same, which comprises a mounting frame a moving component, a motor, a transmission mechanism, two lifting rods, a connecting member and two guide rails. The transmission mechanism moves the connecting member up and down along the guide rails, so that the lifting rods and the moving component are allowed to move up and down. The power for the lifting motion is provided by the transmission mechanism, the guide rails on two sides ensure the stability of the lifting motion, and the lifting rods fixed on two sides of the connecting member further transfers the motion downward to the smoke guide plate, so that the lifting motion of the smoke guide plate is very stable.

Abstract: The present invention discloses an intelligent range hood and a control method thereof, which comprises a housing, a fan (4), a smoke collecting hood (3), a smoke guide plate (6), a controller and a sensor (8) for detecting concentration of smoke and/or vapor inside or outside the housing. The sensor (8) outputs an electrical signal to the controller; and, the controller controls rotation speed of the fan motor (5) and position of the smoke guide plate (6) according to the signal received from the sensor (8). The controller not only can automatically adjust the rotation speed of the fan motor (5) so as to allow the air volume of the fan (4) to adapt to the working condition of the range hood in real time, but also can adjust the air inlet area and the distance between the negative pressure region and the smoke source by moving the smoke guide plate (6) up and down, so as to adapt the change in the working condition.

Abstract: A protection device for an oil-smoke sensor comprises a protection housing (1) having a first end, a second end, and an inner chamber (2); the first end having a first opening (3) for receiving a probe (5) of the oil-smoke sensor and in communication with the inner chamber (2); a second opening (4) is disposed on the second end which is opposite to the first opening (3) and in communication with the inner chamber (2). Because the probe (5) is sealing mounted in the first opening (3), the probe (5) will not be directly exposed in oil-smoke flow. When in use, the protective device is mounted in a manner that the axial direction of the protective device is vertical to the oil-smoke flow direction.

Abstract: A sink-type washing machine comprises a case having a sink body; the sink body has a recess at least at the center of the bottom portion; a drain board having a same shape as the recess which is covered on the recess; the drain board has a plurality of drain holes; the recess under the drain board defines into a drain region; the surface of the drain board is flush with the bottom portion of the sink body around the drain board; the water pump is disposed in the drain region for pumping the water in the drain region to above the drain board. By having the water pump arranged in the drain region of the sink body, the water pump is provided with a great water replenishment effect, arrangement of a water outlet component is facilitated, and an improved spraying effect can be acquired.

Abstract: A real-time fume concentration monitoring system includes an electrical box having a closed internal space, wherein a divider is disposed within the electrical box so that the internal space of the electrical box is divided into a first chamber and a second chamber; a signal emitting unit is disposed within the first chamber, and a signal receiving unit is disposed within the second chamber; a portion of the electrical box corresponding to a signal emitting portion of the signal emitting unit and signal receiving unit is a light-transmitting region; a signal output terminal of the signal receiving unit is connected to a data processing unit. By detecting the fume concentration in a contactless manner, power consumption is low, the energy efficiency demand for the whole machine in the standby state is satisfied, and the signal detection sensitivity is high.

Abstract: The present invention discloses an impeller for a fan, which comprises a plurality of blades (2) and a rear wheel disc (1); the plurality of blades (2) are arranged one by one successively along a circumferential direction of the rear wheel disc (1); an angle ? is defined between the first projection line (21a) of each outer edge (21) and a radial line of the rear wheel disc (1) and satisfies the following condition: ?60°???60°; an angle ? is defined between the second projection line (22a) of each inner edge (22) and the radial line of the rear wheel disc (1) and satisfies the following condition: 20°???70°; an angle ? is defined between a first connecting line (L1) and a second connecting line (L2) and satisfies the following condition: 10°???65°. The impeller for a fan is good in aerodynamic performance, high in both fan efficiency and air pressure, and large in gradient of the generated negative pressure.

Abstract: A sink-type washing machine includes a case, a drain board, a water pump and a rotary spray arm; the case includes a sink body and a cover plate; the sink body has a recess which forms a drain region, the water pump is inside the drain region, the drain board covers the drain region, the rotary spray arm is above the drain board, water outlets being in communication with the flow channel in the water pump so that water in the drain region can be sprayed into the washing space and above the drain region. A drain board covers the drain region and a water pump is disposed inside the drain region, the water pump is isolated from the washing region by the drain board, so that the water flowing back to the water pump is firstly filtered by the drain board.

Abstract: A rotary spray arm for a washing device and a washing device, the rotary spray arm comprises a pair of an upper cover and a lower cover attached to the upper cover; a flow channel disposed between the upper cover and the lower cover, the water outlets are disposed on the upper cover; an upper chamber in communication with the flow channel is formed at a center of the lower cover; the flow channel is located at two sides of the upper chamber, and a hole matching to the upper chamber is formed on a bottom surface of the lower cover. The rotary spray arm is provided with a chamber for accommodating the water outlet portion of the water pump and the chamber is communicated to the water outlets, therefore, the rotary spray arm can be manufactured independently of the water pump, and both processing and mounting are very convenient.

Abstract: A sink-type washing machine includes a case, a drain board, a water pump and a rotary spray arm; the case includes a sink body and a cover plate; the sink body has a recess which forms a drain region, the water pump is inside the drain region, the drain board covers the drain region, the rotary spray arm is above the drain board, water outlets being in communication with the flow channel in the water pump, so that water in the drain region can be sprayed into the washing space and above the drain region. A drain board covers the drain region and a water pump is disposed inside the drain region, the water pump is isolated from the washing region by the drain board, so that the water flowing back to the water pump is firstly filtered by the drain board.

Abstract: A rotary spray arm for a washing device and a washing device, the rotary spray arm comprises a pair of an upper cover and a lower cover attached to the upper cover; a flow channel disposed between the upper cover and the lower cover, the water outlets are disposed on the upper cover an upper chamber in communication with the flow channel is formed at a center of the lower cover; the flow channel is located at two sides of the upper chamber, and a hole matching to the upper chamber is formed on a bottom surface of the lower cover. The rotary spray arm is provided with a chamber for accommodating the water outlet portion of the water pump and the chamber is communicated to the water outlets, therefore, the rotary spray arm can be manufactured independently of the water pump, and both processing and mounting are very convenient.