306results about "Control inputs involving system states" patented technology

A humidifier according to an embodiment of the present disclosure includes: a water tank forming a space in which water is held; a first humidification reservoir connected to the water tank through a supply tube, in which a heater is placed; a first valve opening and closing the supply tube; a second humidification reservoir connected to the first humidification reservoir through a first connection pipe, in which a vibrator is placed; and a middle tray placed below the water tank, and a weight sensor is placed in the middle tray, and when a weight value based on data sensed by the weight sensor is equal to or smaller than a first reference value in an operation stop state, the first valve is opened.

To disclose one example of a refrigerant leakage detector capable of detecting leakage of a refrigerant even when a state where a compressor is in a stopped state for a long time has occurred.SOLUTION: When a value obtained by subtracting detection pressure Pi(n) from reference pressure Pi(m) becomes a predetermined value or higher, a determination device determines occurrence of leakage of a refrigerant. A start day means a day when a compressor starts from a state where the compressor is in a stopped state continuously for 24 hours or longer. The reference pressure Pi(m) means pressure detected by a pressure sensor S1 when the compressor is in a stopped state at the start day. The detection pressure Pi(n) means pressure detected by the pressure sensor S1 in the stopped state when the stopped state of the compressor continues for 24 hours or longer.SELECTED DRAWING: Figure 2

The method, device, and air conditioner for cleaning the filter (1) of an air conditioner relate to the technical field of smart home appliances, and include: acquiring a standby time length and an operating parameter during operation of the air conditioner; acquiring a reference time of the previous filter (1) cleaning when the standby time length is greater than a first threshold value or the operating parameter meets a preset condition; and performing a corresponding filter (1) cleaning operation based on the reference time. The air conditioner can timely start filter (1) cleaning by using the standby time length and the operating parameter as trigger conditions for filter (1) cleaning during standby and operation of the air conditioner, respectively. Furthermore, the air conditioner can perform the corresponding filter (1) cleaning operation based on the reference time of the previous filter (1) cleaning, thereby avoiding a problem that the air conditioner frequently cleans the filter (1) in a short time, resulting in excessive energy consumption, due to a short interval between the time when the air conditioner cleans the filter (1) during standby and the time when the air conditioner cleans the filter (1) during operation.

To provide an air-conditioning controller capable of preventing easy detachment of a cable connected to an air conditioner.SOLUTION: An air-conditioning controller includes: a casing 2; an accommodation part 11 disposed in the casing 2 and accommodating an electronic component; a mounting plate 24 disposed on a back surface side of the accommodation part 11 to fix a body on a wall surface of a building; and a connector 34 disposed on a back surface side of the casing 2 and connecting the cable. The mounting plate 24 includes: a mounting plate body 25 fixed to the wall surface; and a movable part 26 that couples one side of the body 25 to one side of the casing 2 via a hinge mechanism. The mounting plate body 25 includes an opening part 36 for inserting a cable 38 to be connected to an air conditioner 10. The casing 2 has a front surface side cover 22 and is fixed to the mounting plate body 25 by screws 30a, 30b therein.SELECTED DRAWING: Figure 1

A closed-loop climate system including a water tank; cooling pads positioned above the water tank, a thermoelectric unit (TEU) connectable to a power supply, and configured to cool / heat water received from the water tank, a sprinkler tube positioned above the cooling pads and configured to sprinkle the water heated by the TEU onto the cooling pads.

A method for heating, ventilation, and air conditioning (HVAC) system diagnostics includes sending a first instruction to a thermostat to shut down an HVAC system. A user is instructed to minimize background noise. A second instruction is sent to the thermostat to turn on the HVAC system. A third instruction is sent to the thermostat to set a temperature setpoint below or above a value of a room temperature. Outdoor unit sound data is captured for a second time period. The baseline sound data is subtracted from the outdoor unit sound data to determine normalized outdoor unit sound data. Expected sound signatures of the outdoor unit are identified. The normalized outdoor unit sound data is compared to the expected sound signatures. In response to determining that an expected sound signature for a compressor is missing from the normalized outdoor unit sound data, it is determined that the compressor has failed.

The present disclosure relates to a method for drying a wick unit of a humidifier, a controller, the humidifier and a program product. The method includes: detecting, at a first moment during operation of the humidifier, that a liquid level in the humidifier is less than a predetermined threshold; acquiring a speed setting of an air supply unit of the humidifier at the first moment and ambient humidity at the first moment; determining a continuing operation time of the air supply unit based on the speed setting of the air supply unit and the ambient humidity; performing timing for the continuing operation time to a second moment; and stopping operation of the air supply unit at the second moment. In this way, when the humidifier is short of water, the drying function is automatically started, and drying of the wick unit and / or a tank is completed without changing an operation mode.

The disclosure relates to control systems for heating ventilation and cooling systems. In some examples, a controller for a heating ventilation and cooling system receives, from a first temperature sensor, a first temperature of a first air flow entering a conditioner system. The controller also receives, from a first humidity sensor, a first dew point of the first air flow, and also receives, from a thermostat, a desired temperature for a conditioned space. The controller generates adjustment data characterizing an adjustment to at least one of: (1) an exhaust air flow, (2) a desiccant flow rate, (3) a water flow rate, (4) a total air flow rate, and (5) a liquid desiccant concentration of the conditioner system based on at least one of the first temperature, the first dew point, and the desired temperature. The controller transmits the adjustment data to the conditioner system to cause the adjustment.

The application discloses an air conditioner control method and device, an air conditioner and a storage medium, and belongs to the technical field of air conditioners. The application obtains the discharge pressure and the return air pressure of the compressor; controls the operation of the flow regulating device according to the discharge pressure and the return air pressure, detects the discharge pressure and the return air pressure of the compressor in real time, then adjusts the flow regulating device according to the detected discharge pressure and return air pressure, adjusts the flow regulating device, and effectively avoids the situation that the compression ratio of the compressor is increased, further protects the compressor, and prolongs the service life of the compressor.

This air-conditioning device compares a first operation valve provided between a compressor and an indoor heat exchanger on a gas pipe, a second operation valve provided between the expansion valve and the indoor heat exchanger on a liquid pipe, a first temperature measurement unit for measuring the temperature of the indoor heat exchanger, a second temperature measurement unit for measuring the temperature of an outdoor heat exchanger, a third temperature measurement unit for measuring the indoor temperature, a fourth temperature measurement unit for measuring the outdoor temperature, and a control device. The control device has an operation determination unit, a first comparison unit for comparing the outdoor temperature with the temperature of the outdoor heat exchanger in the case of a cooling operation, and a first determination unit for determining the state of each device when the temperature of the outdoor heat exchanger is lower than the outdoor temperature.

A system including a motor of a compressor system and a motor controller is disclosed. The controller is configured to selectively allocate voltage between a first winding and second winding of the compressor motor. Allocation of voltage biases the first winding of the compressor motor over the second winding. The controller selectively allocates voltage to bias windings in response to a command to transition the HVAC control system from the first operating mode to a second operating mode. The controller further selectively allocates voltage to bias windings in response to received sensor data, such as temperature, pressure, or time data. The controller biases voltages for one or more operating modes or load intervals of the system.

The utility model relates to a laboratory multi-room pressure gradient controller, which comprises a plurality of laboratories, a pressure gradient controller, a control screen, ventilation equipment, an absolute pressure difference sensor and a relative pressure difference sensor are arranged in each laboratory, and the control screen is in electric signal connection with the pressure gradient controller. The absolute pressure difference sensor and the relative pressure difference sensor are respectively in electric signal connection with a detection data input end of the pressure gradient controller, the ventilation equipment is in electric signal connection with a control signal output end of the pressure gradient controller, three air pipes are arranged on the pressure gradient controller, a first air pipe is connected with a room of a previous laboratory, and a second air pipe is connected with a second laboratory; the second air pipe is connected with the laboratory, the third air pipe is connected with the atmosphere, a multi-way pipe is arranged on the second air pipe, one branch pipe on the first air pipe and one branch pipe on the second air pipe are connected with a relative differential pressure sensor, and the other branch pipe on the second air pipe and the third air pipe are connected with an absolute differential pressure sensor. According to the utility model, the regulation efficiency and the control precision of the laboratory pressure can be improved.

To solve the problem that a prediction model for predicting power consumption of an air conditioner installed in a server room in a facility has to be generated for each server room.SOLUTION: The air conditioner 2 is installed in a server room 92 in the facility 91. The air conditioning learning device 1 generates the prediction model M1 by learning the air conditioning feature values and the power consumption of the air conditioner 2 in association with each other. The prediction model M1 predicts the power consumption of the air conditioner 2 from the air conditioning feature amount. The air conditioner 2 includes an indoor fan 22, an air inlet 20a, and an air outlet 20b. The air conditioning characteristic amount includes the difference between the static pressure of the air in the vicinity of the air inlet 20a and the static pressure of the air in the vicinity of the air outlet 20b.SELECTED DRAWING: Figure 1

The invention provides a motor driving device with high reliability and the like. A motor drive device (100) is provided with: an inverter circuit (40) that converts a DC voltage of a smoothing capacitor (20) into an AC voltage; and a control unit (60) that controls the inverter circuit (40), in which an AC voltage on the output side of the inverter circuit (40) is applied to a motor (M1) connected to the fan (F1), the control unit (60) being set so as to stand by without driving the motor (M1) when the detected value of the DC voltage is included in a prescribed range after the power supply is stopped, and to control the inverter circuit (40) when the detected value of the DC voltage is not included in the prescribed range. The higher the induced voltage or rotational speed of the motor (M1) as the fan (F1) idles, the higher the upper limit value and lower limit value of the prescribed range.

A method for assessing an efficiency of a chiller. The method includes: performing, using a processor of a computer system, an energy balance check on operational data of a chiller in a chiller group; selecting, using the processor and based on the energy balance check, a reference chiller from one or more other chillers in the chiller group, wherein an energy flow of the reference chiller has a best energy balance amongst the one or more other chillers; determining, using the processor and reference operational data from the reference chiller, the efficiency of the chiller; and performing, based on the determined efficiency of the chiller, an action with respect to a chiller plant containing the chiller. Other aspects are described and claimed.

The invention relates to a method, performed by a control device (100), for cleaning an evaporative humidifier and cooler apparatus (1) for humidification and cooling of air, the apparatus (1) comprises: a cooling and humidification media (2), which is configured to receive and evaporate a fluid (4); a fluid distribution element (6), which is configured to distribute the fluid (4) to the cooling and humidification media (2); and a tray (8) arranged to collect fluid (4) downstream of the cooling and humidification media (2), wherein the fluid (4) distributed by the fluid distribution element (6) is collected from the tray (8). The method comprises: determining (s101) the condition of the cooling and humidification media (2) based on data from a sensor device (10) arranged in fluid communication with the fluid (4) downstream of the cooling and humidification media (2); and supplying (s102) at least one cleaning fluid (12; 14) to the cooling and humidification media (2) dependent on the condition of the cooling and humidification media (2). The invention also relates to a system (200) comprising an evaporative humidifier and cooler apparatus (1) for humidification and cooling of air, a control device (100) and a sensor device (10) arranged in communication with the control device (100).

The invention discloses an air conditioner and a defrosting judgment method thereof, electronic equipment and a storage medium. The method comprises the steps that environment parameters and system operation parameters are collected; and a plurality of real-time judgment indexes and a frosting risk index F are obtained based on the environment parameters and the system operation parameters, and if any real-time judgment index does not meet the corresponding preset requirement and F is larger than a set threshold value F0, it is judged that the air conditioner needs to be defrosted. According to the method, the multiple real-time judgment indexes and the frosting risk index F are obtained on the basis of the environment parameters and the system operation parameters, double verification is conducted by combining the real-time judgment indexes and the frosting risk index F, then whether the air conditioner evaporator needs to be defrosted or not is judged, the accuracy rate is higher than that of the prior art depending on a single temperature difference index, and therefore the technical problems of mistaken defrosting and delayed defrosting are solved.

To improve the comfort of a target space conditioned by an air conditioning system. A controller (60) of an air conditioning system (10) performs a first control action when a load index is lower than a reference value, and performs a second control action when the load index is higher than the reference value. The load index correlates with the air conditioning load of a target space (70). The first control action is an action of maintaining the blowout flow rate at a first flow rate and adjusting the blowout temperature so that the temperature of the target space (70) becomes a set temperature. The second control action is an action of maintaining the blowout temperature at the first temperature and adjusting the blowout flow rate so that the temperature of the target space (70) becomes a set temperature.

Improved apparatus and methods for a Smart Rooftop Unit (SRTU) incorporating infrared (IR) thermal imaging and artificial intelligence (AI) for enhanced HVAC performance are disclosed. The SRTU integrates multiple IR cameras positioned strategically on, around, or within the unit to capture comprehensive thermal images, enabling real-time monitoring and predictive maintenance. An AI-driven control system analyzes the thermal images to optimize defrost cycles, heating and cooling loads, and overall system efficiency. The control system interfaces with building management systems (BMS) for dynamic adjustments based on occupancy, air quality, and weather conditions. The modular design of the SRTU facilitates easy assembly, maintenance, and component upgrades. Advanced sensors and environmental monitors provide continuous data to ensure optimal operation and energy efficiency. The methods include steps for data acquisition, AI analysis, and system adjustments to maintain peak performance and extend the lifespan of the SRTU components.

To provide an air conditioner, an air conditioning control method, a program and a storage medium capable of appropriately determining a control parameter relative to a control space.SOLUTION: An air conditioner includes a first sensor for acquiring positional information on a position of a user in a control space and a control section that performs air-conditioning control. The control section acquires the positional information via the first sensor, acquires first physical constitution information on a physical constitution of the user, and determines a control parameter including at least one of a set temperature, set humidity, a wind speed and a wind direction on the basis of the positional information and the first physical constitution information.SELECTED DRAWING: Figure 2

To provide an adjusting device for easily reducing amount of energy to be consumed.SOLUTION: An adjusting device includes: a device communication part 11 to execute input and output of information between a building 30 and a supply installation 70; an operation part 12 to obtain a reduction parameter on the basis of the information on an ability of equipment; an information generation part 16 to output information on the reduction parameter and effect information to the building, the effect information including effects on the basis of alteration of a parameter of energy to be supplied to a reduction parameter; an instruction part 17 to instruct the supply installation to supply a reduced energy; and an extraction part 15 to extract a target equipment 31T where its ability is reduced if the energy based on the reduction parameter is supplied. The information generation part 16 generates provision information and output the provision information to the target building 30T, the provision information including at least one of the following contents: an explanation of the ability reduction against the target building 30T provided with the target equipment 31T; and a promotion to improve the target equipment 31T.SELECTED DRAWING: Figure 2

Provided is an air conditioner having a function for preventing pooling of refrigerant when an air-warming operation is thermally off or stopped. A multi-type air conditioner having an outdoor unit, a plurality of indoor units, and a control device, the outdoor unit and the plurality of indoor units being connected by refrigerant piping, wherein the control device has: a means for stopping a fan provided to an indoor unit that is executing an air-warming operation when the indoor unit is thermally off, where the indoor temperature has reached a set temperature so that heat exchange in the indoor heat exchanger is unnecessary, or when the indoor unit assumes an air-warming stop state in which the air-warming operation is stopped; a means for increasing the opening degree of an expansion valve provided to the indoor unit when the indoor unit assumes the air-warming stop state; and a means for blocking refrigerant from flowing into and out of the indoor heat exchanger provided to the indoor unit after the fan has been stopped and the opening degree of the expansion valve has been increased.

An air cleaning system includes a housing having an inlet and an outlet, and a filter positioned within the housing, downstream of the inlet. A fan assembly is located within the housing. The fan assembly is in airflow communication with the filter. A sensor is positioned within the housing. The sensor is configured to monitor at least one of a particle size, an accumulation of dust on a surface of the filter, and a pressure drop over the filter. A result of a comparison between a measured dust level at the filter and a dust threshold is communicated to a user.

To solve problems that, when a constitution of a facility apparatus varies greatly depending on an installation site, operation data of an apparatus similar to the facility apparatus cannot be utilized, a control model cannot be learned prior to initiation of operation, and the facility apparatus cannot therefore be efficiently controlled using the control model in starting operation.SOLUTION: A control system 1 includes a facility apparatus, and a control unit 99. The control unit 99 generates first operation data D12 or D13, which is dummy operation data of the facility apparatus, on the basis of site information 52 or 53. The site information 52 or 53 is information on a facility apparatus at a site where the facility apparatus is installed. The control unit 99 uses the first operation data D12 or D13 to learn a first control model M12 or M13. The control unit 99 controls the facility apparatus according to the first control model M12 or M13.SELECTED DRAWING: Figure 5

To prevent a refrigerant from flowing into a control chamber and igniting when the refrigerant having combustibility leaks into a machine chamber for storing a compressor.SOLUTION: A machine room 21 that forms a first space S1 that houses the compressors 5, a control device 30 that controls the compressors 5, a control room 22 that houses the control device 30 and forms a second space S1 that is isolated from the first space S2, a communication portion 2324 that causes the first space S1 and the second space S2 to communicate with each other, and an air discharge fan 26 that generates a flow of air guided from the second space S2 to the first space S1 via the communication portion 2324; The air-cooled heat pump chiller 1 includes a refrigerant concentration detection part 27 for detecting the concentration of the refrigerant leaked to a machine chamber 21, and a control device 30 controls an exhaust fan 26 so as to increase the air blowing amount of the exhaust fan 26 according to the increase of the concentration of the refrigerant detected by the refrigerant concentration detection part 27.SELECTED DRAWING: Figure 2

A humidifier according to an embodiment of the present disclosure includes: a water tank forming a space in which water is held; a first humidification reservoir connected to the water tank through a supply tube, in which a heater is placed; a first water level sensor sensing a water level of water held within the first humidification reservoir; a second humidification reservoir connected to the first humidification reservoir through a first connection pipe and a second connection pipe, in which a vibrator is placed; a second water level sensor sensing a water level of water held within the second humidification reservoir; and a pump placed in the second connection pipe, and when a humidification operation is turned on, a first water level is sensed by the second water level sensor, a residual water recovery operation is performed in which the pump operates to recover residual water in the second humidification reservoir to the first humidification reservoir through the second connection pipe.

Provided is an air conditioner. The air conditioner includes a compressor, a power module configured to drive the compressor, a power module temperature sensor configured to detect the temperature of the power module, a memory configured to store one or more computer programs, and one or more processors communicatively coupled to the compressor, the power module, the power module temperature sensor, and the memory, wherein the one or more computer programs include computer-executable instructions that, when executed individually or collectively by the one or more processors, cause the air conditioner to: determine whether a current of the compressor corresponding to a target frequency of the compressor is greater than or equal to an upper limit current corresponding to the outside air temperature, and, on the basis of determining that the current of the compressor is greater than or equal to the upper limit current corresponding to the outside air temperature, limit the current applied to the compressor to a value less than the upper limit current corresponding to the outside air temperature when the outside air temperature is less than a reference temperature, and increase the current applied to the compressor to a value greater than or equal to the upper limit current on the basis of the detected temperature of the power module when the outside air temperature is greater than or equal to the reference temperature.

To provide a heat pump system and its control method.SOLUTION: A heat pump system comprises a cooling line 100 and a dehumidifying line 200. The system is configured upon switching of a control unit 400 into: a cooling mode, a dehumidifying valve 230 is closed and a cooling / heating valve 60 is opened; a dehumidifying mode, the dehumidifying valve 230 is opened and the cooling / heating valve 60 is closed; and a cooling and dehumidifying mode, the dehumidifying valve 230 is opened and the cooling / heating valve 60 is also opened. The system is further configured such that a refrigerant discharged from a compressor 10 is distributedly supplied to the cooling line 100 and the dehumidifying line 200 at a preset ratio, is caused to flow alternately from the cooling line and the dehumidifying line into a liquid receiver separator 80 provided at the front end of the compressor to be circulated to the compressor 10.SELECTED DRAWING: Figure 1