55results about How to "Large temperature fluctuations" patented technology

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to prevent room temperature from being too high influctuation during defrosting, the method comprises the following steps that in the heating operation process of an air conditioner, whether the air conditioner meets defrosting conditions is judged;in the heating operation process of the air conditioner, whether the air conditioner meets defrosting conditions is judged; if yes, before the air conditioner enters a defrosting mode, the temperaturet of an outdoor coil pipe is obtained, and the temperature t0 of the outdoor coil pipe is obtained again after a preset time; and t and t0 are compared, and the operation frequency of a compressor, throttle opening or the indoor unit and / outdoor unit fan rotating speed are selectively controlled according to the comparison result. Before the air conditioner enters the defrosting mode, some energyis stored, the energy is supplemented into a room in the air conditioner defrosting process, and therefore room temperature fluctuation is prevented from being too high during defrosting.

Screw dowel for concreting into a railway sleeper or ballastless track and frictionally connecting to a sleeper screw, comprising a threaded portion (14) with external thread flights (18) arranged on the outside of the screw dowel (10) and with internal thread flights (19) arranged on the inside of the screw dowel; and an upper subportion (16) without external thread that is situated close to the dowel opening (26) in the installed state; the screw dowel comprises two constituent parts made of different materials, namely a basic body made of plastic and a cylindrical ring (20) made of a steel material and mounted with a form fit and / or force fit.

The invention belongs to the technical field of air conditioners and particularly relates to a defrosting control method for an air conditioner. In order to prevent excessive room temperature fluctuation during defrosting, the method comprises the following steps that whether the air conditioner meets defrosting conditions or not is judged during heating operation of the air conditioner; if yes, the exhaust temperature t of a compressor is acquired before the air conditioner enters the defrosting mode, and the exhaust temperature t0 of the compressor is acquired again after a preset time interval; and t and t0 are compared, and the operating frequency of the compressor and the throttle valve opening or the fan rotation speed of an indoor unit and / or an outdoor unit are selectively controlled according to the comparison result. According to the defrosting control method for the air conditioner, before the air conditioner enters the defrosting mode, the operating frequency of the compressor and the throttle valve opening or the fan rotation speed of the indoor unit and / or the outdoor unit are selectively controlled according to the comparison result of t and t0 to store a part of energy, and in the defrosting process of the air conditioner, the part of energy is replenished indoors, so that excessive room temperature fluctuation during defrosting is effectively prevented.

The invention provides a heat pump system of an air-conditioner, the air-conditioner and a defrosting control method of the air-conditioner. The heat pump system comprises a compressor, an indoor heatexchanger, a first outdoor heat exchanger, a second outdoor heat exchanger, a first four-way valve and a second four-way valve, wherein the first outdoor heat exchanger and the second outdoor heat exchanger are connected in parallel; a first valve opening of the first four-way valve is connected with the indoor heat exchanger; a second valve opening of the first four-way valve is connected with an air suction opening of the compressor; a third valve opening of the first four-way valve is connected with a fourth valve opening of the second four-way valve; a fourth valve opening of the first four-way valve is connected with an exhausting opening of the compressor; a first valve opening of the second four-way valve is connected with the first outdoor heat exchanger; a second valve opening ofthe second four-way valve is connected with the indoor heat exchanger; and a third valve opening of the second four-way valve is connected with the second outdoor heat exchanger. By means of the heatpump system of the air-conditioner, the air-conditioner and the defrosting control method of the air-conditioner, air-conditioner heating is continuous in the defrosting period, thus the indoor temperature keeps steady, and the user experience is improved.

The invention provides a humidifier humidifying capacity testing device which is used for testing a humidifier to be tested and comprises an environment temperature adjusting box, a first heat exchange assembly and a second heat exchange assembly, and the first heat exchange assembly and the second heat exchange assembly are arranged in the environment temperature adjusting box. The first heat exchange assembly comprises a container, a first heat exchange pipe and a second heat exchange pipe. A first liquid heat exchange medium is accommodated in the container; at least part of the first heatexchange tube is arranged in the container, gas passes through the first heat exchange tube, the second heat exchange tube is used for passing through a first liquid heat exchange medium, the gas canexchange heat with the first liquid heat exchange medium through the first heat exchange tube, the first heat exchange tube is connected with a humidifier to be tested, and the gas can be input into the humidifier to be tested through the first heat exchange tube; the second heat exchange assembly is used for exchanging heat with the first liquid heat exchange medium in the second heat exchange pipe. According to the test device, it can be guaranteed that the flow of gas input into the humidifier to be measured is not limited, and it can be guaranteed that the temperature of the gas input intothe humidifier to be measured is accurately controlled.

The invention provides a compartment temperature control method of a refrigerator. The compartment temperature control method comprises the following steps of: receiving a first temperature signal detected by a temperature sensor in a compartment of the refrigerator, and judging whether the first temperature signal is in a first temperature interval; if the first temperature signal is in the first temperature interval, judging that the temperature sensor is in a normal state, and controlling a compressor to be started or stopped in a preset way according to the first temperature signal; and if judging that the first temperature signal is not in the first temperature interval, judging that the temperature sensor has a fault, and controlling the compressor to be started and stopped according to a preset stop / start time rate. According to the embodiment of the invention, when the temperature sensor has the fault, the compressor can be controlled to be started and stopped normally so as to prevent the compartment temperature fluctuation from being overlarge, and compartment function failure is avoided.

The invention discloses an air conditioner and a control method for self-cleaning of the air conditioner, and belongs to the technical field of air conditioners. The control method includes the following steps that the current indoor temperature of the air conditioner in the frosting stage for running the indoor unit cleaning mode is acquired; on the basis of the temperature difference of the current indoor temperature and the initial indoor temperature when the air conditioner starts the indoor unit cleaning mode, running parameters of at least one component of the air conditioner are adjusted; the at least one component comprises an inner fan; and the running parameter of the inner fan includes the air supply duration determined according to the inner fan coil pipe temperature. With thecontrol method for self-cleaning of the air conditioner, according to the indoor temperature detected in the frosting stage of the self-cleaning mode, the running parameters of air conditioner components including the inner fan are adjusted, so that the temperature difference of the indoor temperature and the initial indoor temperature when the air conditioner starts the indoor unit cleaning modeis maintained in the set temperature difference range, the relatively large temperature fluctuation can be avoided in the indoor environment in the frosting stage of self-cleaning of the air conditioner, and the use experience of users when the air conditioner executes the self-cleaning mode can be effectively guaranteed.

The invention discloses a method for strengthening biological phosphorus removal of municipal sewage A / O process through internal reflux of sludge, belongs to the field of advanced sewage treatment, and solves the problem that the phosphorus removal performance of a biological phosphorus removal system becomes poor easily due to conversion of phosphorus accumulation metabolism into glycan metabolism. The method comprises steps: firstly, adjusting the DO concentration ranges of an anaerobic section and an aerobic section to be 0-0.1 mg / L and 2-4 mg / L respectively, the SRT of a system to be 10-12 d, the HRT of the anaerobic section and the HRT of the aerobic section to be 2 h and 5 h respectively, and the MLSS range of the anaerobic section to be 2500-3500 mg / L; secondly, increasing internal reflux of sludge in the anaerobic section, namely refluxing 20% of sludge at the end of the anaerobic section to the beginning of the anaerobic section so as to improve the phosphorus load of the sludge in the aerobic section, and inducing glycan metabolism to be converted into polyphosphate metabolism by promoting excessive phosphorus absorption of the sludge in the aerobic section so as to strengthen the phosphorus removal performance of the system; and meanwhile, controlling SRT to be 10-12 d, and discharging phosphorus from the system in the form of phosphorus-rich sludge; returning the undischarged sludge to the initial stage of the anaerobic section, namely controlling the external reflux ratio of the sludge, stopping internal reflux of the sludge in the anaerobic section after the TP removal rate of the system is greater than 95% and maintaining for two weeks, and considering that the TP removal performance of the system is enhanced.

The invention discloses a control method for an air conditioning system and belongs to the technical field of air conditioning control. The air conditioning system comprises an electric heating devicearranged in an indoor unit. The control method comprises the following steps of acquiring a mode switching control command comprising a mode type in a self-cleaning mode; analyzing the mode switchingcontrol command to acquire the mode type; and when the mode type is a refrigerating mode, reducing the rotating speed of an indoor fan and / or controlling the electric heating device to be started. According to the embodiment of the invention, discomfort to human body and large temperature fluctuation as the indoor unit blows strong cold air are avoided when the air conditioning system exits the self-cleaning mode, so that the user experience is improved. The invention discloses a control device for the air conditioning system, the air conditioning system, computer equipment and a storage medium.

The invention discloses a sludge drying and incinerating device and a sludge incinerating method thereof. The sludge drying and incinerating device comprises an incinerator body, a vertical smoke exhaust channel is formed in the top of the incinerator body, a heat recovery device is arranged in the incinerator body in a penetrating mode, a feeding hopper is connected to the smoke exhaust channel through a feeding channel, a first spiral conveyor is arranged in the feeding channel, a spiral sludge drying sliding way is arranged at the top in the incinerator body and matched with the side wall of the incinerator body in a sealed mode, a penetrating and through sludge falling channel is formed in the spiral sludge drying sliding way, and a temperature control cover plate is arranged at the top of the sludge falling channel; the temperature control cover plate is controlled by a temperature control push rod to cover or open the sludge falling channel, so that the temperature in the incinerator body is maintained at a set temperature, the situation that the temperature fluctuation of a hearth is too large due to different sludge components is avoided, the heat recovery device can stably absorb heat, and energy conservation and emission reduction are facilitated.

The invention discloses an electric cabinet cooling structure of a heat pump drying unit. The heat pump drying unit comprises an evaporator. The evaporator is used for cooling and dehumidification onthe return air of the unit, so that the area, on the downstream part of the evaporator, in the circulation direction of air flow is the dry and low-temperature area. The electric cabinet cooling structure comprises a first air channel. The first end of the first air channel communicates with the dry and low-temperature area. The second end of the first air channel communicates with the interior ofan electric cabinet. According to the electric cabinet cooling structure, the dry and cold air in the dry and low-temperature area can be conveniently introduced into the electric cabinet so that cooling on the electric cabinet can be realized, and the operational failure, caused by too high temperature in an electric cabinet, of components can be avoided while it is not needed to arrange the electric cabinet in the dry and low-temperature area. The invention further discloses the heat pump drying unit.

The invention discloses an air conditioner and a self-cleaning control method thereof, belonging to the technical field of air conditioners. The control method includes: obtaining the current indoor temperature of the air conditioner in the defrosting stage of the indoor unit cleaning mode; adjusting the operating parameters of at least one component of the air conditioner based on the temperature difference between the current indoor temperature and the initial indoor temperature when the air conditioner turns on the indoor unit cleaning mode ; After satisfying the defrosting switching conditions, control the air conditioner to enter the defrosting stage of the cleaning mode of the internal unit, and control to turn on the electric heating device of the internal machine. The self-cleaning control method of the air conditioner provided by the present invention adjusts the operating parameters of the air conditioner according to the detected indoor temperature in the frosting stage of the self-cleaning mode, so as to maintain the temperature difference between the indoor temperature and the initial indoor temperature when the air conditioner turns on the internal unit cleaning mode Within the set temperature range, the indoor environment will not have large temperature fluctuations during the frosting stage of the self-cleaning of the air conditioner, which can effectively ensure the user experience when the air conditioner performs the self-cleaning mode.

The invention discloses an online pressure metal thermal treatment process and an online pressure metal thermal treatment device. According to the process, a pressure device is adopted to synchronously heat a workpiece and apply a pressure to the workpiece so as to realize thermal treatment and then discharging and cooling are automatically carried out. The metal thermal treatment device comprises a supporting body, a pressure mechanism, two heating mechanisms, a temperature control device, a time control device and a cooling mechanism, wherein the pressure mechanism comprises first and second pressure bases which are mounted in the supporting body and can be propped against each other and first and second driving mechanisms; first and second profiled grooves are respectively formed in the opposite surfaces of the first and second pressure bases; insulation structures are also arranged on the outer surfaces of the first and second pressure bases; the two heating mechanisms are respectively mounted in the first and second pressure bases; the temperature control accuracy of the temperature control device is 1 DEG C; the temperature control device is mounted outside the supporting body; the time control accuracy of the time control device is 1s; the time control device is mounted outside the supporting body; the cooling mechanism is mounted below the supporting body. According to the online pressure metal thermal treatment process and the online pressure metal thermal treatment device, the fact that the workpiece has qualified performance in the treatment process is guaranteed, and the phenomena of deformation, blowing-out discharging and the like are avoided.

The invention discloses an air conditioner and a self-cleaning control method thereof, belonging to the technical field of air conditioners. The control method includes: obtaining the current indoor temperature of the air conditioner in the defrosting stage of the indoor unit cleaning mode; adjusting the operating parameters of at least one component of the air conditioner based on the temperature difference between the current indoor temperature and the initial indoor temperature when the air conditioner turns on the indoor unit cleaning mode ; At least one component includes an internal fan, and the operating parameters of the internal fan include air supply time determined according to the temperature of the coil of the internal machine. The self-cleaning control method of the air conditioner provided by the present invention adjusts the operating parameters of the air-conditioning components including the internal fan according to the detected indoor temperature in the frosting stage of the self-cleaning mode, so as to compare the indoor temperature and the internal unit cleaning mode when the air conditioner is turned on. The temperature difference value of the initial indoor temperature is maintained within the set temperature range, so that the indoor environment will not produce large temperature fluctuations during the frosting stage of the self-cleaning of the air conditioner, effectively ensuring the user experience when the air conditioner is performing self-cleaning mode.

The invention provides a refrigerator. The refrigerator comprises storage rooms and an evaporator used for providing a cooling capacity for the storage rooms. The refrigerator further comprises a liquid storage device, a defrosting box, a liquid inlet pipeline, a heating device and a liquid returning pipeline. Defrosting liquid is contained in the liquid storage device. An inner cavity with an upward opening is defined by the defrosting box, and the evaporator is arranged in the inner cavity of the defrosting box. The liquid inlet pipeline is arranged to guide the defrosting liquid in the liquid storage device to the portion above the evaporator so as to spray the evaporator. The heating device is arranged on the liquid inlet pipeline and arranged to heat the defrosting liquid flowing through the liquid inlet pipeline. The liquid returning pipeline communicates with the inner cavity of the defrosting box and is arranged to convey the defrosting liquid in the defrosting box back to the liquid storage device. Compared with the prior art that a heating device is utilized for heating surrounding air to conduct baking type defrosting on an evaporator through hot air, the defrosting liquid and the evaporator can be subjected to sufficient heat exchange through the defrosting manner, a better heat exchange effect is achieved, accordingly, the defrosting efficiency is improved, and the energy consumption can be reduced.

The invention provides a wall top cutting device for dividing decoration areas based on water mist and dust suppression. plate and a T-shaped water distribution pipe, the baffle plate is set in a semicircular shape as a whole, and a rubber sealing ring is pasted on the circumference of its inner end surface; the bottom of the motor is locked and supported by a handle frame, and its front end is locked and installed There is a baffle plate; the central rotating shaft of the motor runs through the baffle plate and protrudes and rotates to be placed in the protective cover, and the cutting piece is locked and clamped and installed on the head end section of the motor central rotating shaft; the front end of the T-shaped water distribution pipe The two outlet pipes are locked and connected with the two spray pipes through the two water guide hoses, and the two spray pipes can be compressed. The two springs follow the rotary cutting of the cutting blade and slide down, so that the two top nozzles can be in contact with the cutting groove. Sliding and leveling, the cutting fume is aligned and precisely sprayed, and the dust reduction effect is remarkable.