171results about How to "Improve operating energy efficiency" patented technology

The invention provides a GRNN-based water chilling unit energy efficiency model modeling method and a water chilling unit group-control method based on cold load prediction and a water chilling unit energy efficiency model, and belongs to the field of water chilling unit energy saving. The water chilling unit energy efficiency model is established by using a GRNN technology and actual operating data of a refrigeration system, so that the energy consumption of the water chilling unit under different operating conditions can be predicted quickly and accurately. The operating unit number and theload rate distribution of the water chilling unit are optimized in real time by using the cooling load prediction data and the water chilling unit energy efficiency model with a goal of minimum systemenergy consumption, so that the operation energy efficiency of the refrigeration system is effectively improved.

The invention discloses a frequency control method and system for an electric frequency conversion heat pump hot water machine compressor. The method includes the steps that the outlet water temperature of a heat exchanger and the water tank temperature of a water tank are detected; the set temperature of the outlet water of the heat exchanger is generated according to the temperature of the water tank; control over the frequency of the frequency conversion compressor is conducted according to the outlet water temperature and the set outlet water temperature of the heat exchanger. According to the frequency control method and system of the frequency conversion heat pump hot water machine compressor, the mode that control over the frequency of the compressor through the outlet water temperature of the heat exchanger is provided, the operation frequency of the frequency conversion compressor can be lowered effectively, the unit operation energy efficiency is improved, and the reliability of the compressor is guaranteed on the condition that the outlet water temperature is constant is guaranteed.

The invention discloses a CO2 transcritical cascading heat pump system and an interstage compressor capacity matching method thereof. The matching scheme of gas displacement of a compressor in two-stage system design is optimized according to different work environments of CO2/ a CO2 cascading heat pump system, so that the cascading heat pump system runs under the condition of the highest energy efficiency ratio. The cascading heat pump system is a CO2 transcritical system at the high-temperature grade and is a CO2 subcritical system at the low-temperature grade, and the temperature of an outlet of a high-temperature-grade gas cooler, the heat exchange temperature difference in an intermediate heat exchanger and low-temperature-grade evaporating temperature serve as working condition temperature variables. High-temperature-grade evaporating temperature and high-temperature-grade exhaust pressure in the intermediate heat exchanger are controlled, and the optimal interstage compressor capacity matching method of the cascading heat pump system under different working condition temperature variables is provided.

The invention provides an ejection refrigerating cycle device which comprises a compressor, an outdoor heat exchanger, a gas-liquid separator, an indoor heat exchanger, an ejector, a first electronic expansion valve and a second electronic expansion valve. An exhaust port of the compressor is connected with the outdoor heat exchanger through a pipeline, the other end of the outdoor heat exchanger is connected with the first electronic expansion valve through a pipeline, and the other end of the first electronic expansion valve is connected with the gas-liquid separator through a pipeline. The gas-liquid separator is provided with a gas outlet and a liquid outlet, the gas outlet is connected with a first inlet of the ejector, and the liquid outlet is connected with the second electronic expansion valve through a pipeline. The other end of the second electronic expansion valve is connected with the indoor heat exchanger, the other end of the indoor heat exchanger is connected with a second inlet of the ejector, and an outlet of the ejector is connected with a gas suction port of the compressor through a pipeline. When the working condition of the air conditioner is changed, the working medium state and flow of the first inlet of the ejector are adjusted through the first electronic expansion valve, the application working condition range of the ejector is widened, the application efficiency of the ejector is increased, and operation energy efficiency of the air conditioner is increased.

The present invention relates to the technical field of green building energy efficiency evaluation methods, in particular to an energy efficiency evaluation and diagnostic analysis method for green public A diagnostic analysis method for building energy efficiency; an energy efficiency evaluation method for the operation phase of the green public building. The method of the present invention has real-time and versatility: a hierarchical evaluation index system that characterizes the operating state of the green building is established relatively completely, through the processing of operating data and historical data, corresponding monitoring indicators and statistical indicators can be determined, and based on The comparison of design data and evaluation benchmarks of relevant standards and specifications can comprehensively evaluate the energy utilization level of green buildings in the operation stage; at the same time, the method of the present invention can carry out classified diagnosis according to the factors affecting energy efficiency in operation, and carry out process-based diagnosis according to the influence rules, providing Reasonable suggestions for optimizing operation.

The invention provides an air conditioner without dripping water. The air conditioner comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a throttling mechanism, an indoor heat exchanger, a liquid two-way valve, a steam three-way valve, a liquid pipe, a gas pipe, a liquid pipe joint, a gas pipe joint, an indoor unit water basin, a water pipe joint, a water pipe, a water pipe plug connector, a water distributor and an outdoor unit water basin, wherein one end of the indoor heat exchanger is connected with one end of the gas pipe through the gas pipe joint; the other end of the gas pipe is connected with the four-way reversing valve through the steam three-way valve; the other end of the indoor heat exchanger is connected with one end of the liquid pipe through the liquid pipe joint; the other end of the liquid pipe is connected with the throttling mechanism through the liquid two-way valve; the indoor unit water basin is connected to one end of the water pipe through the water pipe joint; the other end of the water pipe is connected with the water distributor through the water pipe plug connector; the outdoor unit water basin is arranged on the lower part of the outdoor heat exchanger. According to the air conditioner, the situation that an adverse effect is caused to the daily life of neighbors downstairs due to water dripping of the air conditioner can be avoided.

The invention provides an air conditioner oil return control method and device and an air conditioner. The air conditioner oil return control method comprises the steps that when the oil discharge amount in an oil separator reaches a preset value, an electromagnetic valve is started to return oil; the temperature of an oil return capillary tube after oil return is obtained; and when the temperature after the oil return and the preset theoretical oil return temperature meet the preset condition, the electromagnetic valve is turned off to stop returning the oil. According to the control method,the oil amount in the oil separator is subjected to detection and calculation, when the oil amount in the oil separator reaches the threshold value, the electromagnetic valve is started to return theoil through the oil return capillary tube, the temperature of the oil return capillary tube after the oil return is monitored, the actual oil return temperature is compared with the theoretical oil return temperature so that it can be effectively judged that a refrigerant passes through the oil return capillary tube, then the electromagnetic valve is turned off when the refrigerant passes throughthe oil return capillary tube, the situation that the excessive refrigerant passes through bypasses of the oil return capillary tube and goes back to a compressor for doing invalid work is avoided, then the running effect of an air conditioner unit is improved, and the energy consumption is reduced.

The invention discloses an air conditioning system cold load prediction method and a cold water unit group control strategy. The method comprises the steps that the cold load increment delta Qyx (t) from the moment t to the moment t-tau is calculated; a model is established and meteorological parameters of t-tau, t and t + tau are collected and are substituted into the cold load theoretical calculation values of the moments, and then the cold load theoretical calculation increment delta Qjs (t), delta Qjs (t + tau) between the two time periods and t moment correction coefficient gamma = deltaQjs (t) / delta Qyx (t); and according to the formula of Qyc (t + tau) = Qyx (t) + delta Qjs (t + tau) / gamma, a cold load prediction value of t + tau is obtained. Subsequently, on the basis of Qyc (t + tau), the cold water unit group control strategy at the moment t + tau is determined. According to the method and the strategy, an air conditioner running actually measured cold load at the momentt is taken as a prediction starting point, the cold load theory calculation model is combined for use, so that the air conditioner cold load is predicted at the moment t + tau, then the cold water unit group control strategy is adjusted, and the running energy efficiency of a cold water unit is improved.

The invention discloses a multiple on-line system and a control method thereof. The multiple on-line system comprises an outdoor unit, multiple indoor units and a refrigerant amount adjusting device.The outdoor unit comprises a compressor, a four-way valve, an outdoor heat exchanger and an outdoor throttling valve; the refrigerant amount adjusting device comprises an intermediate heat exchanger,an adjustable throttling valve, an electromagnetic valve and a gas-liquid separator, and is used for enabling the refrigerant amount to reach to the appropriate state through controlling the electromagnetic valve to be opened and adjusting the opening degree of the adjustable throttling valve when the refrigerant amount of the multiple on-line system is excessive or in shortage. According to the multiple on-line system provided by the embodiment of the invention, not only can the energy efficiency of system operation be improved, but also the liquid impact problem produced by liquid return ofthe compressor can be avoided, and the system operation reliability is improved.

The invention discloses an intelligent air conditioner monitoring system. The intelligent air conditioner monitoring system comprises an air conditioner arranged in a room, a gateway, an energy-efficiency socket, a first temperature sensor, a second temperature sensor and a cloud server which is used for monitoring analysis of operation of the air conditioner; the air conditioner is connected withthe energy efficiency socket; the first temperature sensor is arranged in the room; the second temperature sensor is arranged out of the room; the gateway is arranged at a position of which the distance from the room is identical to the distance from a position out of the room; the energy efficiency socket, the first temperature sensor and the second temperature sensor are separately connected with the gateway through signals; the gateway is connected with the cloud server through signals; operation data of the air conditioner and environment temperature are monitored and acquired through thecloud server; data mining and data analysis are performed based on cloud calculation; intelligent anomaly detection for cooling/heating energy efficiency of the variable-frequency air conditioner canbe realized; a situation that the energy efficiency of the air conditioner is lowered can be discovered by users in time; the operation energy efficiency of the air conditioner is improved by adopting diagnosis regulation measures; power utilization comfort of the users is improved; electric energy is saved; and electricity cost is reduced.

The invention discloses an air conditioner and a control method, and belongs to the technical field of air conditioners. The air conditioner comprises a controller, a temperature sensor, an electric control component and a capacity-variable compressor assembly, wherein the electric control component is arranged on an outdoor unit of the air conditioner. The capacity-variable compressor assembly comprises a capacity-variable compressor. The air conditioner further comprises a heat-dissipating pipe set, wherein the heat-dissipating pipe set is connected to a refrigerant circulation pipeline and used for conducting heat dissipation on the electric control component. The controller is used for acquiring the outdoor environment temperature, controlling the capacity-variable compressor to work in a double-cylinder mode and controlling the flow of the refrigerant flowing through the heat-dissipating pipe set to be increased when the value of the outdoor environment temperature is greater than or equal to the preset temperature threshold. According to the air conditioner, the capacity-variable compressor and the heat-dissipating pipe set which is used for conducting heat dissipation on the electric control component are adopted, the operation modes of the capacity-variable compressor are switched according to the outdoor temperature conditions, the heat dissipation pipe set is controlled to conduct heat dissipation on the electric control component so as to enable the refrigerant outputted by the compressor to meet the requirements for indoor heat exchange and heat dissipation of the electric control component, and therefore the overall operation energy efficiency of the air conditioner is improved.

The invention relates to a solar-ground source heat pump coupled energy supply system and an operating method thereof. A large unit, a small unit and solar hot water are adopted to supply heat to a building, the two units are interconnected and intercommunicated at the tail end and ground source side of the building, the heat is supplied to the building under various modes by using two ground source heat pump systems and the solar hot water according to an actual thermal load requirement, the operation mode of the system is optimized under the condition of ensuring that the soil temperatures of the ground source heat pumps are balanced, and efficient operation for cooling in summer and heating in winter is realized. When bearing an extremely low heat supply load within a relatively long period of time, the heat supply requirement of the building is met through supplying heat by solar-assisted ground source heat pumps and directly supplying heat by solar energy; and when bearing a normal heat supply load, the heat supply requirement of the building is met by using a pure ground source heat pump unit.

The invention discloses a solar solution dehumidification radiation air conditioning system and relates to the technical field of air conditioning. The solar solution dehumidification radiation air conditioning system includes a solar energy solution dehumidification fresh air system and a capillary network radiant cooling and heating system. An auxiliary heating device is arranged in a layered heat insulation water tank inside the solar energy solution dehumidification fresh air system, the two ends of the layered heat insulation water tank are connected with a first water pump and a solar thermal collector sequentially through a water pipe, the two ends of the layered heat insulation water tank are connected with a second water pump and a first heat exchanger sequentially through a waterpipe, and the two ends of the first heat exchanger are connected with a solution pump, a solution regeneration tower, an electric three-way valve, a concentrated solution tank, a first solution pump,a second heat exchanger, a solution dehumidification tower, a second solution pump and a dilute solution tank. An air cooled heat pump inside the capillary network radiant cooling and heating system,a capillary network and a third water pump are sequentially connected through a water pipe. The solar solution dehumidification radiation air conditioning system is available all year round, can independently control the indoor temperature and humidity, can scientifically and effectively improve energy utilization rate and reduce environmental destruction.

The invention relates to a solar energy-ground source heat pump coupling type energy supply system provided with two buried pipe groups. The solar energy-ground source heat pump coupling type energy supply system provided with the two buried pipe groups is characterized in that the energy supply system comprises a solar heat collector, a heat-storage water tank, a ground source heat pump unit, the first buried pipe group, the second buried pipe group, a building tail end device, a heat-collection circulating water pump, a heat-storage circulating water pump, a ground source side circulating water pump, a first heat-storage control valve, a second heat-storage control valve, a first ground source side control valve, a second ground source side control valve, a first pipe group flow regulation valve, a second pipe group flow regulation valve, a first pipe group heat meter and a second group pipe heat meter; the solar heat collector is sequentially connected with the heat-storage water tank and the heat-collection circulating water pump through pipelines, namely a heat collection cycle is formed, and hot water generated by solar energy is collected; and the hot water outflow end of the heat-storage water tank is sequentially connected with the first heat-storage control valve, the heat-storage circulating water pump, the first buried pipe group, the second heat-storage control valve and the backflow end of the heat-storage water tank through pipelines, so that a heat storage cycle is formed.

The invention discloses a non-stopping defrosting running method of an air-conditioner. The non-stopping defrosting running method comprises the steps that the air-conditioner is controlled to conduct heating operation; the outdoor environment temperature is detected; the working state of an outdoor heat exchanger is adjusted according to the outdoor environment temperature; when the outdoor heat exchanger is adjusted to meet the preset condition, the outdoor coiler temperature is detected; and the working state of the outdoor heat exchanger is adjusted according to the outdoor coiler temperature, and therefore one of a first outdoor heat exchanger body and a second outdoor heat exchanger body runs to absorb heat, and the other one of the first outdoor heat exchanger body and the second outdoor heat exchanger body runs to release heat for defrosting. According to the technical scheme, an appropriate control mode can be selected in the air-conditioner running process, the running energy efficiency of the air-conditioner is improved, and non-stopping defrosting is achieved.

The invention relates to a method for controlling cooling tower outlet water temperature according to outdoor air state, which is characterized by comprising the following steps: 1) determining the lowest outlet water temperature of the cooling tower and the maximal efficiency of the cooling tower according to the properties of the refrigerating unit and cooling tower; 2) measuring and obtaining the outdoor air state; 3) calculating the cooling tower efficiency in the current state; 4) correspondingly adjusting the switch of the cooling tower fan motor and the by-pass valve of the frequency converter and cooling tower according to the actual cooling tower efficiency and outdoor air state; and 5) repeating the steps 1)-4) at time intervals T (T is usually 5 minutes to 3 hours). By using the method, the outlet water temperature of the cooling tower changes as the outdoor air state changes, thereby keeping the lowest outlet water temperature value of the cooling tower and enhancing the actual operation energy efficiency of the refrigerating machine. The method obviously enhances the operating efficiency of the refrigerating unit, and has the characteristic of energy saving.

The invention provides a solid adsorption technology based frostless air source heat pump system. The solid adsorption technology based frostless air source heat pump system comprises an air channel, a compressor, a condenser, a drying heat exchanger, an evaporator and a fan. The air channel is in a shape of a Chinese character 'ao', two shoulder portions of the air channel are respectively provided with an air outlet and an air inlet, and two mutually parallel side walls, perpendicular to the air inlet direction, on the air channel are respectively the first air channel side wall and the second air channel side wall. The drying heat exchanger, the evaporator, the fan, a first air valve, a second air valve, a third air valve and a fixing device are arranged in the air channel. The solid adsorption technology based frostless air source heat pump system can avoid evaporator frosting, and the operating energy efficiency of the system is improved. Under the moisture absorption effect of a drying agent, the moisture content of air undergoing heat exchange of the evaporator is reduced, the dew point temperature of the evaporator is reduced and is made lower than evaporation temperature, and the frostless operating effect of the evaporator is achieved.