89results about "Space heating and ventilation safety systems" patented technology

The invention discloses an air conditioner and fresh air system predictive control method and system based on the indoor number of people. The control method comprises the following steps that a current indoor image and current indoor carbon dioxide concentration data are collected; according to the current indoor image and/or the current indoor carbon dioxide concentration data, the indoor numberof people is recognized; according to the current indoor carbon dioxide concentration data and the current indoor number of people, the temperature change amount and the carbon dioxide concentrationchange amount after the first preset duration are predicted; and the air conditioner and/or the fresh air system is adjusted according to the temperature change amount and the carbon dioxide concentration change amount. According to the control method, the indoor number of people can be accurately recognized according to the indoor image and/or the indoor carbon dioxide concentration data, and theair conditioner and/or the fresh air system can be accurately adjusted according to the indoor number of people, so that the accuracy of the number identification of people is effectively improved, then the accuracy of predictive control of the air conditioner and the fresh air system is improved, and the effects of being simple and easy to realize are achieved.

The invention discloses an air conditioner and controlling method thereof capable of cooling operation in the low temperature environment when the outdoor temperature is low. The air conditioner comprises a variable capacity compressor which can vary the capacity; an indoor heat exchanger used for evaporator at the time of the cooling operation; an outdoor temperature sensor for detecting the outdoor temperature; a controlling section which confines the lower limit capacity of the compressor when the detected outdoor temperature is within the predetermined region during cooling operation, andwhich variably controls the compressor capacity to be larger than the predetermined lower limit capacity based on load. Therefore, the invention can permit the substantially cooling operation in the environment that the outdoor temperature is low, and is benefit to avoid the indoor heat exchanger being frozen, so that the reliability of the equipment cooling circulation can be ensured. Further, the invention can avoid the phenomena of the compressor damage caused by liquid cooling agent flowing in by controlling the speed of indoor fan during cooling operation.

The invention discloses a phase-change energy storage type radiant heating and cooling tail end device and a control method. The phase-change energy storage type radiant heating and cooling tail end device comprises a heating device, a cooling device, a control system of the heating device and a control system of the cooling device. The heating device is a phase-change energy storage type floor arranged on the ground, and the cooling device is a phase-change energy storage type suspended ceiling arranged at a roof. Phase-change materials and capillary networks are arranged in the phase-change energy storage type floor and the phase-change energy storage type suspended ceiling, so that the tail end of a radiant heating air conditioner is combined with the phase-change energy storage technology. By using the phase-change materials, energy storage at night and energy release in the daytime can be achieved so that operation cost can be saved for users using electric energy conversion, and the difference between the peak and the valley of a power grid can be reduced to protect power grid equipment; meanwhile, the method of combining time control with temperature control is adopted, the adopted temperature control can make up for defects of the time control, and therefore the indoor temperature is kept within the human comfort range.

The invention discloses an intelligent control method for a fresh air handling unit. The control method comprises the following steps: (1) monitoring indoor and outdoor temperature values, an indoor CO2 concentration value and a PM2.5 concentration value in real time; and (2) firstly, adjusting the openness of a fresh air valve according to the monitored indoor and outdoor temperature values and an indoor temperature priority algorithm, and when the outdoor temperature or indoor temperature is in a preset range, calculating and executing the openness of the fresh air valve according to the monitored CO2 concentration value, the PM2.5 concentration value and an air quality balance algorithm. The invention further provides the fresh air handling unit applying the control method. By the adoption of the indoor temperature priority algorithm and the air quality balance algorithm, the indoor temperature can be guaranteed preferentially under any working condition, and then the indoor PM2.5 concentration and the indoor CO2 concentration are effectively controlled, so that the environmental quality of air in a classroom is guaranteed, and the comfortable sensation of a student to a learning environment is enhanced; and the operation duration of the fresh air handling unit is preset according to a class period and background noise in the classroom, so that no influence on the class teaching is caused during the operation of the fresh air handling unit, and a good learning environment is supplied to the student.

The invention discloses a method, system and device of air injection of an air conditioning system and an air conditioner. The method comprises the following steps that the discharge temperature of a compressor and an adjusting parameter of an electronic expansion valve are obtained, and opening of the electronic expansion valve is adjusted according to the discharge temperature of the compressor and the adjusting parameter of the electronic expansion valve. The technical problem that in the prior art, the stability of air injection control and adjustment is low is solved.

Apparatuses, methods and systems directed to reducing mineral buildup on drift eliminators of a cooling tower. Some embodiments of the invention allow irrigation of the drift eliminators of the cooling tower with fluid in the basin of the cooling tower to reduce mineral buildup. In other embodiments, the systems disclosed can be integrated with the drift eliminators to provide constant irrigation of to reduce mineral buildup. In some other embodiments, a control unit is used to selectively irrigate the drift eliminators based on the fluid temperature in the basin and the temperature inside and outside of the cooling tower.

The invention relates to a multiple on-line air-conditioner set and network communication method in the refrigerating device expansion domain, which consists of outdoor set system and indoor set system, wherein the indoor set system contains several indoor sets and consumer end spreading apparatus; the consumer end spreading apparatus can send the disposed datum by indoor sets into the outdoor set system; the indoor set system is united to divide the datum in different units, which sends the task to different outdoor control plates through outdoor set main control plate. The invention realizes the indoor set expansion through the mode combination pattern.

The invention relates to an air-condition radiation control method and system, wherein the air-condition radiation control method comprises the following steps: S1, detecting the first environment temperature value T1 within the specific scope of the position of an air conditioner external unit while an air conditioner is started; S2, acquiring the running time t of the air conditioner; S3, judging whether t is equal to or greater than M, wherein the M represents a first target time, if yes, executing the step S4; otherwise, returning to the step S2; S4, detecting the second environment temperature value T2 within the specific scope of the position of the air conditioner external unit; S5, judging whether the absolute value of the T1 and T2 is equal to or greater than A, wherein the A represents the target temperature difference value, if yes, executing the step S6, and otherwise, returning to the step S4; S6, controlling the air conditioner to enter into a heat dissipation mode. The air-condition radiation control method provided by the invention can accurately and intuitively reflect the heat dissipation condition of the air conditioner; the heat exchange capability of the air conditioner is enhanced, while the refrigerating/heating effect of the air conditioner is improved, damage to elements of the air conditioner, caused by poor heat dissipation, can be prevented, and the service life of the air conditioner is prolonged.

The invention provides an indoor temperature prediction method for an air conditioner. The indoor temperature prediction method comprises the following steps that a prediction model is established, wherein a plurality of outdoor environment temperatures and a plurality of indoor environment temperatures are sampled according to the same first sampling frequency; a sampling temperature difference of each corresponding sampling outdoor environment temperature and each sampling indoor environment temperature is calculated; the sampling temperature differences are sorted, and prediction temperature differences are determined; the temperature differences in a sampling chamber are calculated; prediction parameters are calculated; the indoor temperatures are predicted, and the prediction of the indoor temperature comprises the following steps of setting a first prediction interval time, obtaining the outdoor prediction environment temperature at the end of the first prediction interval time,and sampling the indoor temperature in the current state; and the indoor environment temperatures are calculated at the end of the first prediction interval time. The invention further discloses the air conditioner. According to the method, the variation trends of the indoor environment temperatures can be predicted in advance, and data basis is provided for intelligent control of a subsequent airconditioner. A user uses the change trends of the indoor environment temperatures to accurately control the air conditioner to start and stop, and the indoor temperature prediction method has the advantage of being high in intelligent degree.

The invention discloses an air-conditioner and a method for switching the working mode of the air-conditioner. The method solves the problem of high noise generated when the working mode of the air-conditioner is switched in the prior art. The air-conditioner comprises an indoor unit, an outdoor unit and a liquid pipe, a low-pressure air pipe, a low-pressure air pipe valve, a high-pressure air pipe and a high-pressure air pipe valve connected between the indoor unit and the outdoor unit; the air-conditioner also comprises a liquid pipe throttling device, a low-pressure air pipe throttling device and a high-pressure air pipe throttling device, wherein the liquid pipe throttling device is connected in series in the liquid pipe; the low-pressure air pipe throttling device is connected in parallel with the low-pressure air pipe valve; and the high-pressure air pipe throttling device is connected in parallel with the high-pressure air pipe valve. By using the technical scheme, the pressureof a coolant can be changed stably, and heat expansion and cold contraction effects are reduced, so that the noise generated when the working mode of the air-conditioner is switched is reduced.

The invention discloses a wireless networking constant humidity machine used in a display case, which comprises a case body; a blower, a refrigeration compressor, an electrical heater and a humidifying water tank are arranged in the case body and are controlled by a microprocessor. An evaporator of the refrigeration compressor and a heating pipe of the electrical heater are respectively arranged in the humidifying water tank. An air outlet of the blower is communicated with a reverse percolating filter in the humidifying water tank by a pipeline. An interface of the microprocessor is respectively connected with a sensor arranged in the display case and a wireless transceiver which realizes communication with a host computer. The air outlet of the humidifying water tank is communicated with each display case inner cavity by the pipeline and a pressure reducing valve. The wireless networking constant humidity machine has the beneficial effects as follows: 1. the wireless networking constant humidity machine satisfies the differentiation requirements of different culture relics on temperature and humidity; 2. the wireless networking constant humidity machine supplies a gap of a central air conditioner in the humidity control ability; and 3. the wireless networking constant humidity machine leaves out the daily work for inspecting the temperature and the humidity in each display case and realizes the all-weather real-time monitoring on environmental index condition of all display cases in offices.

The invention discloses an air conditioner heat radiator and a variable-frequency air conditioner, and relates to the technical field of air conditioners in order to solve the problems that in the prior art, a variable-frequency air conditioner heat radiator is poor in heat radiation effect, and ash is prone to accumulate on inner passages of fins after long-time use. The air conditioner heat radiator comprises a substrate. The front surface of the substrate comprises a plurality of installation areas used for installation of electronic elements. The back surface of the substrate is provided with a plurality of parallel and separate fins. Under the same work condition, the larger is the heat emitting amount of one electronic element, the thicker the part, corresponding to the installation area of the electronic element, of the substrate is. Under the same work condition, the larger is the heat emitting amount of one electronic element, the larger the distribution density of the fins corresponding to the installation area of the electronic element is. The air conditioner heat radiator is used for the air conditioner.

The invention relates to an air outlet structure for air conditioner equipment, a control method and the air conditioner equipment. The air outlet structure for the air conditioner equipment comprises a shell, a centrifugal air suction part and an adjusting part; the shell is provided with an air outlet (8); the centrifugal air suction part is arranged in an air duct of the air conditioner equipment and used for leading airflow in the air duct to the air outlet (8) in the shell to achieve air outflow in the circumferential direction; and the adjusting part is arranged in the air outlet (8) and can adjust the angle of an air flow channel in the manner that the adjusting part moves relative to the air outlet (8), and therefore the air outflow direction can be changed. The air outlet structure for the air conditioner equipment can adopt air supply manners at different angles according to different requirements, so that the comfort degree feeling of a user can be improved as much as possible, or the regional selection requirement of the user for refrigerating and heating can be met.

Disclosed is a humidifier apparatus using a photocatalyst having an air-cleaning function, and more particularly, to a humidifier apparatus using a photocatalyst having an air-cleaning function, which is capable of performing an indoor air-cleaning function and a humidifier function while minimizing energy consumption.

The invention relates to a chilled water system for a central air-conditioning system of a high-rise building and a control method thereof. The chilled water for the central air-conditioning system of the high-rise building, disclosed by the invention, comprises an air conditioner mainframe (1), a low-region chilled water circulating system and a high-region chilled water circulating system, wherein the low-region chilled water circulating system is of a closed type chilled water circulating system, the high-region chilled water circulating system is of an open type chilled water circulating system, the high-region chilled water circulating system is connected with the low-region chilled water circulating system through a high-region water supply tank and a high-region water return tank, and low-temperature chilled water of the air conditioner mainframe (1) is directly conveyed to the tail ends of air conditioners through the low-region chilled water circulating system and the high-region chilled water circulating system without a heat exchanger. According to the chilled water system disclosed by the invention, the chilled water of the air conditioner mainframe can be directly conveyed to all the tail ends without the heat exchanger in a way of combining the closed type system with the open type system, and the energy consumption of the air conditioner mainframe can be saved on the premise of meeting the requirements on temperature and humidity of the tail ends, so that the chilled water system is in line with the environment-friendly requirements of saving energy and reducing consumption, the design is reliable and the energy-saving effect is significant.

The invention discloses a control method and device and an air conditioner. The method comprises the steps of conducting detection on the operation condition of electrical equipment through an alarm detector; and when the abnormal condition is detected through the alarm detector, controlling the abnormal condition. According to the control method and device and the air conditioner, a refrigerant concentration detector, a fire detector, a small fan and a fire extinguishing device containing carbon dioxide are arranged on an indoor unit, so that the electrical equipment adopting combustible type refrigerant is protected; fire danger is avoided to the greatest extent; the mass of the refrigerant of the indoor unit is reduced; the requisite condition for combustion explosion after the refrigerant leaks is eliminated; and safety of users is guaranteed to the utmost extent.

The objective of the invention is to provide an air conditioning device capable of improving heating starting performance or defrosting restorability. The air conditioning device is provided with a compressor which is used for compressing a refrigerant, an indoor heat exchange device through which the refrigerant compressed by the compressor flows in heating operation processes, an electric expansion valve through which the refrigerant condensed by the indoor heat exchange device flows, an outdoor heat exchange device through which the refrigerant expanded by the electric expansion valve flows, an external air temperature detection assembly which is used for detecting external air temperature, and a control part which is used for controlling opening degree of the electric expansion valve. The air conditioning is characterized in that the control part is used for fixing the opening degree of the electric expansion valve according to set time and set opening degree when the heating operation is started, and the opening degree is correspondingly changed based on the temperature difference between the temperature detected by the external air temperature detecting assembly and the air saturation temperature at an inhalation side of the compressor when the heating operation is started.

The invention discloses a method and device for starting an air cooling condensing unit suitable for a low-temperature environment. The method comprises the steps that S10, a starting signal of the condensing unit is obtained by a control main board; S20, shielding of evacuation protection of the control main board is triggered according to the starting signal and evacuation protection of the control main board is made ineffective; S30, under the condition that evacuation protection of the control main board is ineffective, a compressor is started. According to the method and device for starting the air cooling condensing unit suitable for the low-temperature environment, the accuracy of judgment that the evacuation protection condition is met is guaranteed, and it is guaranteed that the air cooling condensing unit can be started and operated smoothly under the low-temperature environment.

The invention discloses a slave communication circuit, a slave, electrical equipment, a master-slave communication circuit and a method. The slave communication circuit comprises a slave universal asynchronous receiver transmitter and an optocoupler output conversion circuit, wherein the slave universal asynchronous receiver transmitter comprises a slave signal transmitting end; the first input end of the optocoupler output conversion circuit is connected with a power supply, and the second input end of an output photoelectric coupler is connected with the slave signal transmitting end; and the first output end of the output photoelectric coupler is connected with the power supply, the second output end of the output photoelectric coupler is connected with the input end of a relay, and theoutput end of the relay is connected with the master signal receiving end of a master communication circuit. According to the slave communication circuit, the slave, the electrical equipment, the master-slave communication circuit and the method, the influence of high low level due to the optocoupler transmission ratio characteristic can be eliminated, so that communication reliability is improved, and thus high and low level can be recognized by a master side chip under various situations.

The invention discloses an air conditioner control method and device, an air conditioner and a storage medium. The air conditioner control method comprises the steps that the noise value of an air conditioner compressor and the noise value of a draught fan system are obtained; and it is determined that the noise value of the compressor is higher than the noise value of the draught fan system, theair conditioner is controlled to adjust running parameters, and accordingly, the noise value of the compressor is smaller than the noise value of the draught fan system. According to the air conditioner control method, the noise of the draught fan system is used for covering the noise of the compressor so that a user can be prevented from hearing the sharp compressor noise, the noise influence ofthe whole air conditioner is lowered, the comfort of the air conditioner is improved, the physical sound isolation manner does not need to be added, and the cost of the air conditioner is reduced.