30results about How to "Simplify connecting lines" patented technology

The invention discloses a method for removing COD (chemical oxygen demand) and ammonia nitrogen from wastewater by using a titanium-base lead peroxide composite electrode. By using wastewater, of which the COD content is 500-1000 mg / L, the ammonia nitrogen content is 50-200 mg / L, the pH value is 6-9 and the chroma is 50-500, as an electrolyte, the wastewater flows into an electrolytic bath from the water inlet, flows through all tank units of the electrolytic bath in a plug-flow mode, and performs electrolytic reaction under the conditions that the current density is 5-15 mA / cm<2> and the hydraulic retention time is 30-120 minutes, thereby achieving the goals of electrocatalytic oxidation and wastewater COD and ammonia nitrogen removal at the same time. The titanium-base lead peroxide composite electrode plate is utilized to carry out the electrolytic catalytic oxidation reaction, thereby implementing synchronously oxidizing wastewater COD and ammonia nitrogen; and no chemical or biological reagent is needed in the reaction process, the wastewater retention time is short, the pollutant oxidation is thorough, no precipitate or sludge is generated, and the efficiency is high.

The invention relates to a sheet bar of a plate heat exchanger. The sheet bar comprises a first plate plane and a second plate plane which are located on positive and negative surfaces of the sheet bar, and separation sections which can divide the sheet bar into at least two regions; the separation sections comprise a first separation section, a second separation section and a third separation section; the third separation section comprises two slots with the same length, the slots are adjacently arranged side by side and are respectively hollowed towardsopposite directionsrelative to the sheet bar, the slots include a first slot and a second slot, and the first separation section and the third separation section are respectively located at the two ends of the second separation section; the first separation section is an extending section of the first slot on the sheet bar, and the second separation section is an extending section of the second slot on the sheet bar; and on the first sheet plane of the sheet bar, the first separation section and the first slot are hollowed, and the second separation section and the second slot are protruded; and on the second sheet plane of the sheet bar, the first separation section and the first slot are protruded, and the second separation section and the second slot are hollowed.

The invention provides an empty and heavy vehicle adjustment valve for a vehicle air braking system. The empty and heavy vehicle adjustment valve comprises a valve body, a sensing part and a first switching part, wherein the valve body is provided with a cavity, a first passageway for communicating the cavity with a control valve, a second passageway for communicating the cavity with a pressure reduction air cylinder and a third passageway for communicating the cavity with a braking cylinder; the sensing part is mounted on the valve body and is provided with a sensing end and a control end; the control end is provided with different control end positions according to vehicle loading conditions sensed by the sensing end; the first switching part is arranged in the cavity and can be switched between a heavy load working position and an empty load working position according to the difference of the control end positions of the sensing part; at the heavy load working position, the control valve is communicated with the braking cylinder and is not communicated with the pressure reduction air cylinder; at the empty load working position, the control valve can be communicated with both the braking cylinder and the pressure reduction air cylinder. According to the empty and heavy vehicle adjustment valve, the problems of complicated connection pipelines among all components of the empty and heavy vehicle adjustment valve and large occupation space in the prior art can be effectively solved.

The invention relates to a multi-way valve and a hydraulic control system. A combined type of a plurality of working groups is adopted in the multi-way valve. Main reversing valves and corresponding pilot oil path on-off control structures are arranged in part of the working groups. The pilot oil path on-off control structures are used for controlling pilot pressure oil between pilot control oil ports and pilot control cavities of the main reversing valves to be supplied or interrupted so that working or unloading of the working groups corresponding to the main reversing valves can be achieved. Compared with an existing hydraulic control system, the hydraulic control system cam limit independent motion and is not provided with special manifold blocks for the main reversing valves of the working groups to control the pilot pressure oil, and therefore the hydraulic control system is simpler in structure and connecting pipeline.

The invention provides a flue gas de-whitening device and technology for a carbon black drying furnace. The device comprises a heat exchanger, a de-whitening tower and a cooling tower, wherein a liquid tank, at least one circulating liquid distributor, at least one packing layer, a cooling water distributor and a demister are arranged in a tower body from bottom to top in sequence; a flue gas inlet and a condensate outlet are formed in the lower side wall, located on the liquid tank, of the tower body; a flue gas outlet is formed in the upper side wall, located above the demister, of the towerbody; the heat exchanger is communicated with the flue gas inlet; the flue gas outlet is communicated with the heat exchanger; the heat exchanger is communicated with a chimney and the external carbon black drying furnace; the condensate outlet is communicated with an inlet of the cooling tower; an outlet of the cooling tower is communicated with the cooling water distributor. According to the flue gas de-whitening device and technology for the carbon black drying furnace, white visual pollution of flue gas can be obviously eliminated, and particularly, the effect is more remarkable in winter; meanwhile, collected condensate is recycled, water resources can be recycled at 35m<3> / h, so that production cost is substantially reduced, and the water resources are saved.

The invention discloses a hydraulic feeding system of a full-automatic top drive drilling machine. According to the hydraulic feeding system disclosed by the invention, a load-sensitive pump substitutes for a metering pump, a hydraulic control proportional directional valve substitutes for a common reversing valve, an overflow valve on an LS (Load-Sensitive) oil path rather than an overflow valve on a main oil path is used for adjusting the down pressure, an explosionproof valve is additionally arranged between a multipath valve and a lifting oil cylinder, and a duplex multipath valve substitutes for a hexad multipath valve. Compared with the prior art, the hydraulic feeding system of the full-automatic top drive drilling machine has the advantages of improving the working efficiency, reducing energy consumption, oil temperature and volume of the multipath valve, well preventing the safety accidents caused by fracture of an oil pipeline and rapid drop of the lifting oil cylinder, reducing the volumes of the valve bodies, simplifying a connection pipeline, saving the maintenance time and improving the working efficiency, the stability and the safety of the system.

An inspection apparatus includes a probe card having a plurality of probes arranged to correspond to each chip of a semiconductor wafer under inspection and contacting a plurality of electrodes of each chip and a test head electrically connected to the respective probes of the probe card and applying test signals from a tester, and a plurality of tester lands of a probe substrate electrically connected respectively to the plurality of probes. A plurality of electrical connecting portions on the tester side of the test head, corresponding to the respective tester lands, are arranged to constitute a plurality of arrangement areas sectioned to correspond to the respective chips under inspection, and the plurality of probes of the probe substrate are connected to the corresponding tester lands provided in the arrangement areas in units of chips under inspection.

A coated wire is solderable with soft solder while maintaining separate phases of the core and the coating. A 100 μm to 400 μm thick nickel wire may be coated galvanically with silver. For a film resistor with coated wires as connection wires, including a platinum measurement resistor on an electrically insulating substrate and connection wires connected to the measurement resistor, the connection wires have a coated nickel core. The coating may be made of silver or glass or ceramic or a mixture of these materials, or on its outside may be made of glass or ceramic or a mixture of these materials. For producing film resistors a thin metal or glass component is deposited on a connection wire connected to a track conductor arranged on an electrically insulating substrate, and a thick glass paste is deposited and fired on this metal or glass component. For mass production of film, several film resistors encased together in glass may be partitioned by fracturing.

An electrical connector between relatively movable end points, comprises a cassette having a stator which is stationary in the mounted position and a rotor which is rotatable relative to the stator about a common axis, the stator and rotor each bearing one of the end points. In the cassette, between the stator and the rotor, an electrical conductor (10) running in a coiled fashion is situated with its ends fixed to the end points in order to connect to continuing connecting lines. To simplify connection of the connecting lines, an identical electrical contact element is attached to each end of the conductor (10). The electrical contact element is provided with pins (22) which are suitable as contact pins for attaching a plug and as contact surfaces for fixedly connecting the conductors of a connection line.

The invention provides a combination valve, a water heating system and a method for controlling the same. The combination valve comprises a valve seat, a water feeding valve and a selector valve. The water feeding valve and the selector valve are fixed onto the valve seat; a tap water inlet, a hot water outlet, a cold water outlet, a hot water inlet and a water inlet-outlet combination are formed in the valve seat, the tap water inlet is communicated with the cold water outlet, and the water inlet-outlet combination is connected with the tap water inlet by the water feeding valve; the selector valve comprises a first valve body and a second valve body, the first valve body and the second valve body are in mutual linkage control to be alternately turned on and off, the water inlet-outlet combination is connected with the hot water outlet by the first valve body, and the hot water inlet is connected with the hot water outlet by the second valve body. The combination valve, the water heating system and the method have the advantages that the combination valve is directly connected with tap water, an energy-consuming water heater and a solar water heater, water feeding can be controlled by the integrated valves of the combination valve, hot water sources can be selected by the integrated valves of the combination valve, accordingly, users can conveniently change the hot water sources, connecting pipelines can be simplified, and the water heaters can be conveniently mounted.

A stator for rotary electric machines is provided, in which a volume occupied by winding portions may be increased and a connecting wire may readily be engaged to prevent from coming off. A plurality of connecting wire engaging hooks 23, with which the connecting wire extending from the winding portion is engaged, are respectively disposed in the vicinity of border portions between a plurality of magnetic pole sections 11 and a yoke 9, corresponding to the magnetic pole sections 11. A mounting location of a connecter 29 on a circuit substrate 7 is determined so that all of ends of a plurality of terminal conductors of the connecter may be located between adjoining two of the connecting wire engaging hooks 23. With this arrangement, all of the ends 31a of the plurality of terminal conductors 31 may be disposed between adjoining two of a plurality of the winding portions 3, and be spaced from the winding portions 3.

The invention discloses a method for removing COD (chemical oxygen demand) and ammonia nitrogen from wastewater by using a titanium-base lead peroxide composite electrode. By using wastewater, of which the COD content is 500-1000 mg / L, the ammonia nitrogen content is 50-200 mg / L, the pH value is 6-9 and the chroma is 50-500, as an electrolyte, the wastewater flows into an electrolytic bath from the water inlet, flows through all tank units of the electrolytic bath in a plug-flow mode, and performs electrolytic reaction under the conditions that the current density is 5-15 mA / cm<2> and the hydraulic retention time is 30-120 minutes, thereby achieving the goals of electrocatalytic oxidation and wastewater COD and ammonia nitrogen removal at the same time. The titanium-base lead peroxide composite electrode plate is utilized to carry out the electrolytic catalytic oxidation reaction, thereby implementing synchronously oxidizing wastewater COD and ammonia nitrogen; and no chemical or biological reagent is needed in the reaction process, the wastewater retention time is short, the pollutant oxidation is thorough, no precipitate or sludge is generated, and the efficiency is high.

The invention discloses an anti-electric shock type water mixing valve. The anti-electric shock type water mixing valve comprises a valve body and a face cover, wherein a handle switch is arranged right ahead the valve body, a mounting seat is arranged at the rear part of the valve body, water inlet chambers and external thread interfaces are arranged on two sides of the valve body, a water outlet chamber is arranged at the lower part of the valve body, two ends of a plastic cold water tube and a plastic hot water tube are respectively sleeved with movable compression nuts, and the cold water tube and the hot water tube are locked on the external thread interfaces of the water inlet chambers of the valve body by virtue of the compression units on one ends of the plastic cold water tube and the plastic hot water tube; the valve body, the external thread interfaces and the mounting seat are subjected to once injection molding by virtue of engineering plastic so as to form an integral structure, and the handle is plastic; the face cover comprises a first hood sleeve and a second hood part, a handle switch is connected with a regulating rod, the regulating rod of a valve core penetrates through a through hole of the first hood sleeve and is inserted into an inner cavity of the handle switch, and the second hood part is sleeved outside the valve body. The anti-electric shock type water mixing valve has the advantages that the structure is simple and reasonable, the manufacturing cost is low, and an electric shock hazard can be effectively prevented.

The invention relates to a simple protection device for laser welding, which comprises a bracket. One end of the bracket is fixed on an upper port of the body, while the other end is connected with a protective gas nozzle by a freely movable joint. The body consists of a cavity, wherein the upper side of the cavity is a cylinder which extends to be a conical body. The central position of the inner wall of the cylinder is provided with a circular passage with the circular cross section as a circular plenum chamber, and the circular plenum chamber divides the cylinder into an outer ring of the cylinder and an inner ring of the cylinder, wherein the wall of the outer ring of the cylinder is provided with M protective gas inlets, and the wall of the inner ring of the cylinder is provided withN outer air inlets of protective gas, and protective lens for protecting laser focus lens are horizontally arranged on the inner wall of the upper part of the cylinder. On the basis of not influencing the beam transmission in the process of laser welding, the simple protection device solves the pollution problem of the focus lens in the process of laser welding with the function of protecting welding seams.

The invention provides a visible light wireless multi-protocol aggregation transmission system and method. The system comprises first transmission equipment, a visible light transmitting device, a visible light receiving device and second transmission equipment, wherein the first transmission equipment is used for determining a source port number, a destination port number and a data transmissionmode of a data frame when a first protocol port receives the data frame, packaging the source port number, the destination port number and the data transmission mode of the data frame with the data frame to form a to-be-sent data frame and converting the to-be-sent data frame into a visible light signal; the visible light transmitting device is used for transmitting the visible light signal; the visible light receiving device is used for receiving the visible light signal; and the second transmission equipment is used for converting the visible light signal into the to-be-sent data frame, analyzing out the source port number, the designation port number, the data transmission mode and the data frame from the to-be-sent data frame and outputting the data frame according to the source port number, the designation port number and the data transmission mode. In the system provided by the invention, by virtue of the way, a connecting line of a target system can be simplified, and maintenance workload of the target system can be reduced.

The embodiments of the present application provide a gas-liquid separator and an air-conditioning system. The gas-liquid separator includes a top cover, the top cover includes a first fluid inlet and a second fluid inlet, and the first fluid inlet and the second fluid inlet are spaced apart from each other; the top cover also It includes a first cavity and a second cavity; wherein, the first fluid inlet communicates with the first cavity, the second fluid inlet communicates with the second cavity, and the top cover also includes a first partition, and the first partition is located in the first cavity between the body and the second cavity and isolate the first cavity and the second cavity. In this application, the top cover of the gas-liquid separator includes two first and second fluid inlets spaced apart from each other, and the first and second fluid inlets and corresponding components pass through independent pipelines The first partition separates the first cavity and the second cavity, so that the two cavities can work independently, and reduce the mutual flow of refrigerants in the two cavities. risk and improve the accuracy of refrigerant flow.

An integrated oil filter comprises a one-way valve, a bypass valve, a spiral spring, a self-seal valve, an oil filter element, an ail filter shell, an oil filter cover, a long screw, a self-locking nut, a shaft elastic retaining ring and an oil filter differential pressure transducer. The oil filter cover is mounted on the lower portion of the shaft elastic retaining ring through the self-locking nut and sleeved with the oil filter shell. The self-seal valve is mounted on the shaft elastic retaining ring through the spiral spring. The one-way valve is mounted on the upper portion of the shaft elastic retaining ring. The bypass valve is mounted on the side of the one-way valve and between an oil outlet and an oil inlet and separated by a partition on the upper portion of the shaft elastic retaining ring. The integrated oil filter has the advantages the oil filter connecting pipes are simplified, self-sealing of internal passages of the oil filer during decomposition oil filtering, oil discharge amount during oil filter decomposition is reduced effectively, oil refilling times are reduced, and system maintenance efficiency is increased.

The invention provides an empty and heavy vehicle adjustment valve for a vehicle air braking system. The empty and heavy vehicle adjustment valve comprises a valve body, a sensing part and a first switching part, wherein the valve body is provided with a cavity, a first passageway for communicating the cavity with a control valve, a second passageway for communicating the cavity with a pressure reduction air cylinder and a third passageway for communicating the cavity with a braking cylinder; the sensing part is mounted on the valve body and is provided with a sensing end and a control end; the control end is provided with different control end positions according to vehicle loading conditions sensed by the sensing end; the first switching part is arranged in the cavity and can be switched between a heavy load working position and an empty load working position according to the difference of the control end positions of the sensing part; at the heavy load working position, the control valve is communicated with the braking cylinder and is not communicated with the pressure reduction air cylinder; at the empty load working position, the control valve can be communicated with both the braking cylinder and the pressure reduction air cylinder. According to the empty and heavy vehicle adjustment valve, the problems of complicated connection pipelines among all components of the empty and heavy vehicle adjustment valve and large occupation space in the prior art can be effectively solved.

The embodiments of the invention provide a gas-liquid separator and an air conditioning system. The gas-liquid separator comprises a top cover, the top cover comprises a first fluid inlet and a secondfluid inlet, and the first fluid inlet and the second fluid inlet are formed in a spaced mode; the top cover further comprises a first cavity and a second cavity, wherein the first fluid inlet communicates with the first cavity, and the second fluid inlet communicates with the second cavity; and the top cover further comprises a first separation part, and the first separation part is located between the first cavity and the second cavity and separates the first cavity from the second cavity. According to the gas-liquid separator, the top cover of the gas-liquid separator comprises the first fluid inlet and the second fluid inlet which are formed in the spaced mode, and the first fluid inlet and the second fluid inlet communicate with corresponding parts through independent pipelines, so that the effect of simplifying a connecting pipeline of the air conditioning system is achieved; and the first separation part separates the first cavity from the second cavity so that the two cavitiescan work independently, the risk that refrigerants in the two cavities flow in series is reduced, and the flowing accuracy of the refrigerants is improved.

A transducer for high-voltage measuring technology, including a housing having a parallelepipedal basic contour, input connections arranged on the housing and carrying input measurement signals in the high-voltage range, output connections arranged on the housing and carrying output signals in the low-voltage range, a transducer circuit arranged in the housing and implemented on a printed circuit board and being contact-connected to the input and output connections. The parallelepipedal basic contour of the housing is designed as an upright construction. The printed circuit board is arranged upright between opposite side walls of a dome formed in the housing. The input connections are arranged facing away from one another on the outer sides of the side walls within the basic contour of the housing, and in a manner engaging through the respective side wall of the dome are in contact with contact elements of the transducer circuit on the printed circuit board.

A transducer for high-voltage measuring technology, including a housing having a parallelepipedal basic contour, input connections arranged on the housing and carrying input measurement signals in the high-voltage range, output connections arranged on the housing and carrying output signals in the low-voltage range, a transducer circuit arranged in the housing and implemented on a printed circuit board and being contact-connected to the input and output connections. The parallelepipedal basic contour of the housing is designed as an upright construction. The printed circuit board is arranged upright between opposite side walls of a dome formed in the housing. The input connections are arranged facing away from one another on the outer sides of the side walls within the basic contour of the housing, and in a manner engaging through the respective side wall of the dome are in contact with contact elements of the transducer circuit on the printed circuit board.

A can includes a body, a sealing area on a wall delimited by a breaking edge, an opening element which in an initial position abuts the wall and is connected to the wall by a connecting element of the opening element. Pivoting the opening element into an open position tears the sealing area along the breaking edge and forms an emptying opening in a region delimited by the breaking edge. The opening element has a carrier body of electrically and / or magnetically insulating material, the opening element carries an antenna on or in the carrier body and a transponder chip connected to the antenna. An electric connection line electrically conductively interconnects and short-circuits terminals of the antenna in the initial position. The electric connection line is irreversibly interrupted and activates the antenna when opening the can by pivoting the opening element from the initial to the open position.

The invention relates to a multi-way valve and a hydraulic control system. The multi-way valve adopts a combined form of a plurality of working links, and a main reversing valve and a corresponding pilot oil circuit switch control structure are arranged in part of the working links. The pilot oil circuit switch The control structure is used to control the on-off of the pilot pressure oil between the pilot control oil port and the pilot control chamber of the main reversing valve, so as to realize the working or unloading of the corresponding working couple of the main reversing valve. Compared with the existing hydraulic control system, the present invention can not only realize independent action limitation, but also does not set a special integrated valve block for the main reversing valve of each working union to control the pilot pressure oil, so no matter in structure or connection The pipeline is simpler.

A coated wire is solderable with soft solder while maintaining separate phases of the core and the coating. A 100 μm to 400 μm thick nickel wire may be coated galvanically with silver. For a film resistor with coated wires as connection wires, including a platinum measurement resistor on an electrically insulating substrate and connection wires connected to the measurement resistor, the connection wires have a coated nickel core. The coating may be made of silver or glass or ceramic or a mixture of these materials, or on its outside may be made of glass or ceramic or a mixture of these materials. For producing film resistors a thin metal or glass component is deposited on a connection wire connected to a track conductor arranged on an electrically insulating substrate, and a thick glass paste is deposited and fired on this metal or glass component. For mass production of film, several film resistors encased together in glass may be partitioned by fracturing.

The invention discloses an in vitro multi-channel micro-current stimulator used in the field of an artificial nerve repair technology, which comprises a pulse signal generator, voltage-current conversion circuits, and a multi-channel connector, wherein the output end of the pulse signal generator is connected with input ends of the voltage-current conversion circuits, output ends of the voltage-current conversion circuits are all connected with the multi-channel connector, the pulse signal generator generates a single-phase pulse square-wave voltage signal and outputs the signal to the voltage-current conversion circuits, and the voltage-current conversion circuits convert the single-phase pulse square-wave voltage signal into a single-phase pulse current signal; and when the voltage-current conversion circuits convert the single-phase pulse square-wave voltage signal into the single-phase pulse current signal, the frequency and the pulse width of pulse are adjusted through the pulse signal generator, and the pulse amplitude is adjusted through a variable resistor Rref. The frequency, the pulse width, and the amplitude output by the in vitro multi-channel micro-current stimulator have larger adjustment range, and a device is easy to manufacture and has lower cost.

The invention discloses a two-speed motor change-over switch in the field of two-speed motors. The switch comprises a wiring part, the wiring part is used for connecting a three-phase power supply and a two-speed motor, the wiring part is provided with two main loops, and when one main loop is in a disconnected state, one end, connected with a live wire of the two-speed motor, of the main loop is communicated with the live wire of the two-speed motor. According to the double-speed motor switching circuit, the original mode that two control switches and one contactor are used for achieving double-speed motor switching in the prior art is replaced, the manufacturing, using and maintaining cost of electric devices is reduced, intensification of switching of the double-speed motor switching circuit is achieved, and meanwhile the problem that when the contactor acts, a contact coil is continuously electrified to generate heat, and energy consumption is generated is effectively solved.

Radio waves from a plurality of satellites can be received by one antenna, thereby realizing a miniaturization and a reduction of costs. A reception signal of a horizontally polarized wave and a reception signal of a vertically polarized wave from one satellite are amplified by low noise amplifiers 21 and 22. A reception signal of a horizontally polarized wave and a reception signal of a vertically polarized wave from another satellite are amplified by low noise amplifiers 23 and 24. One of the low noise amplifiers 21 to 24 is selected in accordance with the polarized wave and the satellite and the signal from the selected low noise amplifier is supplied to a low noise amplifier 4 through a coupling circuit 3. An output of the low noise amplifier 4 is frequency converted by a local oscillator 7 and a mixer 6. In this manner, a plurality of coupling circuits needed in a conventional apparatus are constructed by one coupling apparatus 3, thereby realizing the miniaturization.

Disclosed is a four-in-one mini-LED module, a display screen, and a manufacturing method thereof. The four-in-one mini-LED module comprises a substrate and a plurality of RGB-LED chip sets arranged in an array on the substrate. The RGB-LED chip sets are provided with glue layers. Each RGB-LED chip set comprises an R chip, a G chip and a B chip, each chip has a first electrode and a second electrode, and the first electrode and the second electrode have opposite polarities. The first electrodes of all the chips of the same row are electrically connected, the second electrodes of all the R chips of the same column are electrically connected, the second electrodes of all the G chips of the same column are electrically connected, and the second electrodes of all the B chips of the same column are electrically connected.

The invention belongs to the technical field of engine natural gas system fixing, and particularly relates to a natural gas system fixing frame based on an engine cylinder cover. The natural gas system fixing frame comprises a double-wall supporting pipe, the double-wall supporting pipe is fixedly connected with a natural gas inlet channel of the cylinder cover, and a natural gas injection valve is arranged at the upper end of the double-wall supporting pipe; a double-wall corrugated pipe is arranged at the upper end of the natural gas injection valve, a double-wall air supply pipe is arranged at the upper end of the double-wall corrugated pipe, the double-wall supporting pipe comprises an air cavity between the double walls, the double-wall corrugated pipe comprises an air cavity between the double walls, and the double-wall air supply pipe comprises an air cavity between the double walls; and the cylinder cover is further provided with a pressurized air inlet channel, the pressurized air inlet channel is connected with the natural gas inlet channel in an acute angle manner, air can enter an air inlet cavity, when natural gas leaks, the air inlet cavity can suck the natural gas in the air cavity from an air inlet connector, and then the concentration of the leaked natural gas is reduced.

The invention provides a combined valve, a hot water system and a control method for the hot water system. The combination valve includes a valve seat, a water supply valve and a selection valve, and the water supply valve and the selection valve are fixed on the valve seat; the valve seat is provided with tap water inlet, hot water outlet, cold water outlet, hot water inlet and water inlet and outlet, The water inlet is connected to the cold water outlet, and the water inlet and outlet are connected to the tap water inlet through the water supply valve; the selection valve includes a first valve body and a second valve body that are mutually linked and controlled to realize alternate switching, and the water inlet and outlet are connected to the hot water outlet through the first valve body connected, the hot water inlet is connected with the hot water outlet through the second valve body. The combination valve is directly connected to tap water, energy-consuming water heaters and solar water heaters, and controls water supply and hot water source selection through its own integrated valve, which facilitates users to switch hot water sources, simplifies connecting pipelines, and facilitates the installation of water heaters.