1535 results about "Air source heat pumps" patented technology

The invention relates to the technical field of heat supply system temperature control, and discloses a temperature control method of an air source heat pump heat supply system. The method comprises the following steps: establishing a temperature field model according to temperature-pressure-flow data of the head and tail ends of a building and each region, and obtaining distribution characteristics; analyzing and predicting a thermal load based on the temperature rise and drop rate and the heat storage coefficient; determining a water supply temperature correction coefficient and a valve opening degree through fuzzy control in combination with an outdoor temperature trend; generating a partition start-stop sequence according to the partition start-stop sequence; and finally calculating heat pump operation frequency and water pump rotation speed. According to the method, the partition control strategy based on temperature field modeling is established, the technical means such as unit pressure compensation and partition alternate starting are combined, accurate temperature control over all the heat supply areas is achieved, and the problem of uneven heat supply in the prior art is effectively solved.

The invention provides an air source heat pump heating method and system, and relates to the technical field of heat pump system thermal control, and the method comprises the steps: collecting evaporator surface frost layer thickness, environment temperature and humidity parameters in real time, inputting the parameters to a pre-trained neural network algorithm model, and identifying a frosting rate by analyzing a multi-factor nonlinear relation; predicting a future frosting development trend, and outputting frosting thickness increase prediction and severity degree results; and according to the frosting thickness increase prediction and the severity degree result, reverse circulation defrosting is started in advance when the frost layer does not reach the critical thickness, and optimal control over the defrosting process is achieved by adjusting the opening degree of the four-way valve and the rotating speed of the draught fan, so that the system state after defrosting is obtained. The energy efficiency of the system is improved, and the heating comfort is optimized.

An automatic control system of an air source heat pump analyzes collected multi-dimensional operation parameters in real time based on a machine learning algorithm, constructs a high-precision thermal load prediction model, predicts thermal load requirements in the future 1-24 hours, controls prediction errors within 5%, and achieves minimization of energy consumption and maximization of heat storage efficiency on the premise of meeting operation constraints. The overall energy consumption is reduced by 15%-25% compared with that of a traditional system, the heat loss is reduced by dynamically adjusting the flow of a heat storage medium and optimizing the thermodynamic process of heat storage and heat release, and the heat storage efficiency is improved by 10%-15%. According to the invention, the advanced machine learning algorithm is adopted through the big data analysis module, the multi-dimensional operation parameters are analyzed in real time, a high-precision thermal load prediction model is constructed, the thermal load demand in the future 1-24 hours is predicted, and the prediction error is controlled within 5%.

The invention discloses a temperature and humidity cooperative control method for an air source heat pump drying room, and relates to the technical field of energy conservation, environmental protection and intelligent manufacturing. The method comprises the following steps: acquiring gas heat state parameters and material and environment characteristic parameters in an air source heat pump drying room, and constructing a multi-source state vector; calculating a dynamic response coefficient group and a material evaporation influence coefficient based on continuous sampling data, and establishing a cross response model; a control compensation signal is generated and corrected according to the disturbance estimator, and the comprehensive control quantity is input into an execution module of the air source heat pump system; a dynamic response coefficient group and a lag correction parameter are updated through a periodic feedback data set, and dynamic coordination between temperature and humidity variables is achieved; the response stability of temperature and humidity control can be maintained under the condition that the material moisture content, the stacking density and the external environment condition change, system oscillation and energy consumption deviation are reduced, and the energy efficiency level of the air source heat pump drying process and the product drying uniformity are improved.

The invention relates to the technical field of new energy, and discloses an independent energy supply system suitable for a high-altitude area and a control method thereof, electric power is generated through photovoltaic power generation, part of the electric power is stored in a storage battery, and the residual electric power is used for electrolyzing water to prepare hydrogen and oxygen, and the hydrogen and the oxygen are respectively stored. The oxygen content in the air is increased by mixing the oxygen, the oxygen and the hydrogen jointly enter the fuel cell for chemical reaction, and stable electric power and hot water are output. In order to ensure the stability of the system, a low-temperature air source heat pump is configured to serve as standby heat supply equipment, and accurate adjustment and storage of electric power are achieved through cooperative work of a load tracking module and an efficient storage battery. According to the system, photovoltaic power generation, hydrogen energy storage and fuel cell technologies are combined, continuous and reliable power and heat combined supply can be achieved in high-altitude areas lack of power grid support, and an efficient and environment-friendly solution is provided for energy supply in remote areas.

The invention relates to the technical field of heat pumps, and discloses a heat pump heating and cooling system adopting phase change energy storage, which comprises an air source heat pump, a phase change energy storage device and a heating and cooling terminal device, the phase change energy storage device comprises two phase change energy storage modules which are arranged in parallel; the refrigerant circulation pipeline is provided with a pressure protection assembly. The system further comprises a defrosting control module, and the defrosting control module is in signal connection with an evaporator frosting sensor of the air source heat pump and an energy storage capacity monitoring unit of the phase change energy storage device. Two modules of the phase change energy storage device adopt gradient temperature configuration and are matched with a multi-channel switching valve, the working state can be flexibly adjusted according to the environment and load requirements, and efficient energy storage and energy release are achieved. During defrosting, the low-temperature module responds preferentially, and the heat supply effect is guaranteed; and the pressure protection assembly monitors the pipeline pressure in real time and releases pressure and slowly releases the refrigerant in time when abnormity occurs, so that the safety and stability of the system are ensured.

The invention provides a multi-energy coupling air source heat pump heating type selection and operation method and system, and relates to the technical field of air source heat pumps, which comprises the following steps: predicting a heating load according to building parameters and meteorological parameters, selecting an air source heat pump, and connecting a solar heat collector, a heat storage water tank and a heating tail end. Then, according to the meteorological parameters, the heat yield of the solar heat collector is calculated, the heat collection area and the volume of the heat storage water tank are determined, and an air source heat pump heating performance curve is established; and finally, the input temperature threshold value of the solar heat collector and the operation time period of the air source heat pump are determined based on the system operation optimization model, solar energy is preferentially used for heating, heat supply supplementation is conducted in combination with the heat storage water tank and the air source heat pump, and therefore the energy utilization efficiency is improved, and the heating cost is reduced.

The invention discloses a heat allocation system based on a heat pump. The heat allocation system comprises a water tank; a water source heat pump; an air source heat pump; a cooling tower; a cooling water circulation system; a hot water circulation system; a chilled water circulation system; an exhaust heat recovery system; wherein the water tank, the water source heat pump, the air source heat pump, the cooling tower, the cooling water circulation system, the hot water circulation system, the chilled water circulation system and the exhaust heat recovery system are connected with one another to realize heat allocation, especially heat allocation of a coating pretreatment electrophoresis production line of a vehicle body or parts forming the vehicle body; according to the system, heat generated when the heat pump / refrigerating unit produces chilled water and / or heat taken away in exhaust air can be recycled and used for heating the heat using tail end. Therefore, the heat which is wasted originally can be fully utilized, the energy consumption is reduced, and the utilization efficiency of energy is improved.

The invention discloses a solar energy-phase change heat storage collaborative parallel evaporator segmented defrosting system and method, and belongs to the technical field of air source heat pump defrosting and new energy utilization. Comprising evaporator sets (A / B) arranged in parallel, a compressor, a condenser, a four-way reversing valve, a solar heat collecting plate, an electromagnetic valve, a temperature sensor and a connecting pipeline. A phase change material interlayer is embedded in a finned tube of the evaporator set, the phase change material is connected with the solar heat collection plate through a circulation pipeline, the phase change material absorbs or releases a large amount of latent heat in the solid-liquid phase change process, and heat collected by the solar heat collection plate is stored in a high-density mode. When the evaporator is frosted, heat stored by the phase change material can be released directionally, and melting of a frost layer is accelerated. Through the synergistic effect of solar energy and phase change heat storage, the defrosting time is remarkably shortened, indoor temperature fluctuation caused by reverse circulation is reduced, meanwhile, the energy utilization rate is increased, the structure is simple, the cost is controllable, and the efficient defrosting requirement of the air source heat pump in the cold region is met.

The invention discloses an air source heat pump control system, and particularly relates to the technical field of air source heat pumps, which comprises the following steps: providing an operation parameter intelligent control module, modeling each component of an air source heat pump, outputting a mathematical model of each component, and verifying the reliability; the mathematical models of all the components form an air source heat pump simulation model, and a compressor rotating speed prediction value is output based on the air source heat pump simulation model; a rotating speed control instruction is generated based on the compressor rotating speed prediction value, and the air source heat pump compressor is used for receiving and executing the instruction; the difference between the predicted heat supply coefficient and the actual heat supply coefficient is monitored in real time, and measures are taken; when the difference value between the predicted heat supply coefficient and the actual heat supply coefficient exceeds a threshold value TH1, early warning is carried out; the problems that in the prior art, real-time sensing and self-adaptive adjusting capacity for environment changes are lacked, and the optimal energy-saving effect cannot be achieved are effectively solved. And meanwhile, an evaporator assembly in the air source heat pump is prevented from frosting by providing a frost prevention control module.

The invention discloses a composite joint control method based on a frequency conversion air source heat pump system, and relates to the technical field of air source heat pump systems, and the method comprises the steps: building an HPF control framework, building a multi-input and single-output control model through machine learning, and coupling a PID feedback signal to generate a composite control basic signal; building load single-step forward prediction is carried out by adopting an LSTM neural network, and a building load prediction value is output through training and calculation of the neural network; the heat pump compressor is subjected to staged joint control; forward control is carried out on the load side circulating water pump; a differential switching mechanism is arranged, and water supply temperature deviation is monitored in real time. According to the variable-frequency air source heat pump composite joint control strategy, an HPF control framework, a compressor staged joint control and differential switching mechanism, load side water pump forward control and equipment cooperative linkage are integrated, model dynamic updating and switching parameter optimization are introduced, and the limitation of a traditional single control mode is broken through.

A system for generating steam for industrial heat. The system may include a plurality of heat pump cycles in thermal communication with each other and in thermal communication with a steam generation cycle. The plurality of heat pump cycles may include first and second heat pump cycles. The first heat pump circulates a first a working fluid and includes a first heat exchanger. The second heat pump cycle circulates a second working fluid and includes a second heat exchanger. The first heat exchanger transfers heat from the first to the second working fluid. The second heat exchanger transfers heat to a third working fluid in the steam generation cycle.

The invention discloses a geological battery energy storage system and an operation method. The system comprises a medium and low temperature heat storage module, a high temperature heat storage module and a heat engine circulation module. In the heat storage process, low-grade waste heat can be pumped to the medium temperature to be stored in the medium-low temperature heat storage well, or a solar heat collector, an air source heat pump and the like are used for conveying medium-low temperature heat sources to be stored in the medium-temperature heat storage well. In the charging process, a heat source of the medium-low temperature heat storage module is upgraded and stored in a high-temperature heat storage well by using electric power to drive heat pump circulation; in the discharging process, heat engine circulation is adopted to convert stored high-grade heat energy into electric energy. According to the invention, multiple types of underground spaces can be fully utilized to promote new energy consumption, the stability of a power grid is improved, and meanwhile, concealment and safety are achieved.

The invention provides a multi-energy complementary heating system suitable for dwellings in Tibet regions, and relates to the technical field of building energy conservation and renewable energy utilization. The multi-energy complementary heating system suitable for the folk houses in the Tibet region comprises a solar heat collector, a phase change energy storage wall, a heat storage water tank, an outdoor air source heat pump unit and a tail end fan coil. The solar heat collector collects heat to provide heat for heating when the solar radiation intensity is high. When the solar radiation intensity is low or in cloudy and rainy days, the air source heat pump unit serves as an auxiliary heat source to absorb heat from outside air for indoor heating; the phase change energy storage wall can store redundant heat and release the heat at night or at low temperature, so that all-weather heating is ensured; when the system is in a non-working state in a cold environment, the water pump is started, so that a circulating medium in a pipeline keeps flowing slowly, and freezing is avoided; the special climate and building structure of Tibet are fully considered, the heating efficiency is improved, and the stability and economical efficiency of the system are enhanced.

The invention belongs to the technical field of testing, particularly relates to a testing device for an air source heat pump cooling and heating unit, and aims to solve the problems that in the prior art, in the testing process of the air source heat pump unit, manual carrying is needed, the efficiency is low, potential safety hazards are prominent, equipment damage is easily caused, and the final testing effect is affected. The device comprises a test box and supporting legs arranged at four corners of the bottom of the test box, and monitoring equipment is arranged on one side in the test box; the cabinet door is arranged on one side of the test box, and an observation window is arranged on one side of the cabinet door; the control panel is arranged on one side of the test box; the transmission mechanism is arranged in the test box; the feeding mechanism is arranged in the test box; in actual operation, the air source heat pump cooling and heating unit can be automatically transmitted into the test box, and the accuracy of test data and the practicability of the device are remarkably improved.

The invention relates to the technical field of solar heat pumps, in particular to an air source heat pump control method and system based on deep learning. Comprising the following steps that S1, the liquid working medium temperature of a solar heat storage tank is obtained through a temperature sensor, the solar radiation intensity is obtained through a sensor, and auxiliary management of the air source heat pump is judged according to the liquid working medium temperature of the solar heat storage tank and the solar radiation intensity; and S2, relevant data of the solar heat storage tank are obtained, an adjustment value is obtained by using an adjustment processing formula according to the relevant data, and the liquid working medium in the solar heat storage tank is heated by using an air source heat pump according to the adjustment value. By combining the advantages of the solar photo-thermal system and the air source heat pump, stable heat supply under various environmental conditions is guaranteed, the liquid working medium in the heat storage tank is heated according to a parameter adjustment formula, and breeding of pathogenic microorganisms is eradicated.

The invention provides an air source heat pump unit with an intelligent defrosting function, and belongs to the technical field of heat pump units. Comprising a unit box, the two ends of the inner side of the unit box are fixedly connected with fixing plates, the tops of the two fixing plates are fixedly connected with the same evaporator, the bottom of the evaporator fixedly communicates with a discharge pipe, and the bottoms of the two fixing plates are fixedly connected with the same fixing seat. By arranging the temperature sensor, the flow dividing valve, the air pipe, the defrosting spray head and the flow blocking cover, when the temperature sensor detects that the temperature of the outer side of the evaporator is lower than a certain degree, part of hot steam output downwards from the interior of the connecting pipe is divided through the flow dividing valve, and then the hot steam is sprayed out of the evaporator through the air pipe and the defrosting spray head; and hot steam is guided through the flow blocking cover to flow on the outer side of the evaporator, a frost layer condensed on the outer side of the evaporator is automatically eliminated, the intelligent defrosting effect of the device is achieved, and the practicability of the device is improved.

The invention belongs to the technical field of air source heat pumps, and particularly relates to a defrosting device for an air source heat pump unit, which comprises a heat pump unit body, a movable seat is arranged on one side of the heat pump unit body, and two movable rollers are rotatably connected below the movable seat; and the defrosting mechanism is used for increasing the air speed of hot air in the defrosting process and enabling the hot air to impact the surfaces of the fins in the inclined direction, the defrosting mechanism comprises a fixed guide rail fixedly connected to the upper portion of the movable base, and a sliding block is slidably connected into the fixed guide rail in the vertical direction. By arranging the defrosting mechanism, in the defrosting process, hot air in the rotating process can be obliquely sprayed out from the ventilation holes and impacts on the surfaces of the fins, the obliquely sprayed hot air can increase the force impacting on the surfaces of the fins under the action of centrifugal force, meanwhile, the oblique hot air can achieve the effect similar to'shoveling ', and the defrosting efficiency is improved.

The invention relates to the field of electric power systems, in particular to an energy storage dynamic optimization scheduling method and system of an electric power system and a storage medium, and the method comprises the steps: S1, building an energy storage dynamic calculation model; s3, energy consumption models of a water chilling unit, an air source heat pump, a water pump and a cooling tower are established respectively, and instantaneous energy consumption under different working conditions is calculated by considering operation working conditions and environmental parameter correction; and S4, outputting the utilization rate, the maximum adjusting power, the average adjusting power, the maximum adjusting capacity proportion and the accumulative adjusting electric quantity proportion of the energy storage device, and carrying out quantitative evaluation. According to the method, supply and demand state changes such as valley load, flat load, peak load, peak load and the like of the power system can be identified in real time / quasi-real time, the time periods and power of energy storage and energy release are adjusted, dynamic power distribution of a host in each load time period is realized, and the overall energy efficiency level and operation stability of the system are improved.

The invention discloses an air conditioning system-oriented multi-control object modeling method, which comprises the following steps of: acquiring multi-source operation data acquired by an air conditioning system sensor, performing principal component analysis and time shift correlation analysis on the multi-source operation data, and screening out a core input variable corresponding to a target control object; the target control object comprises virtual indoor temperature, air source heat pump unit energy consumption, water pump energy consumption and fan energy consumption; according to the time-shifting correlation analysis, the lag step length of each variable is determined through the maximum information coefficient, and key time sequence features are screened; and on the basis of the screened core input variables, data driving models of all the control objects are constructed, and the combined type multi-control-object simulation framework is used for predicting the energy consumption and the environment state of the air conditioning system. According to the invention, the dependence of a test method on an actual system and hardware is overcome, and the test cost and risk are reduced. The source code can be tested before system and hardware configuration, and the problem of frequent equipment control caused by testing in an actual system is avoided.

The invention relates to the field of control methods, in particular to an operation control method and electronic equipment based on air source heat pump load rate optimization, and the control method comprises the following steps: calculating and judging whether the obtained heat pump unit load rate Li is less than or equal to 1; the unit energy efficiency COPLi in the frostless state is calculated; whether the evaporation temperature Tei meets the Tilt or not is judged; td, Tilt, Td, Tilt; 0; calculating a defrosting correction coefficient Fi, wherein Fi = (Qi-Qd) / Wi / COPLi; calculating and recording the comprehensive energy efficiency COPci of the heat pump unit, wherein COPci = COPLi * Fi; whether i is equal to the maximum number n of the units is judged, the maximum value is selected according to the multiple COPci obtained through program loop calculation, and therefore the optimal starting number of the system is determined. The number of started units is subjected to loop iteration, and the influence of unit load rates and frosting on energy efficiency under the condition of different numbers of started units is calculated, so that a more accurate comprehensive energy efficiency calculation result is obtained. The optimal number of started units is determined by comparing the maximum values of the comprehensive energy efficiency of the units under the condition of different numbers of started units, so that the comprehensive energy efficiency of the units can be remarkably improved, and the purpose of saving energy is achieved.

The invention relates to the field of welding equipment, and discloses an air source heat pump shell machining and welding device which comprises a machining table, a guide rail is fixedly installed on the upper surface of the machining table, movable seats are movably installed on the two sides of the guide rail, and a discharging table is fixedly installed over the machining table through a support. Straight notches are formed in the two sides of the upper surface of the discharging table, wedge-shaped connecting blocks are fixedly installed at the top ends of the movable seats, the top ends of the wedge-shaped connecting blocks penetrate through the straight notches in the corresponding sides and are fixedly provided with positioning plates, and a vertical cabinet is fixedly installed on the rear side of the top end of the machining table. The bottoms of the inner side ends of the hollow bent air inlet pipe and the hollow bent exhaust pipe are fixedly installed at the two ends of the laser welding gun correspondingly. Workpieces can be accurately positioned and clamped, weld joints can be evenly butt-jointed, the three-way movement module is matched with the variable-angle welding gun to achieve flexible welding, gas protection and water vapor cooling can be conducted, the welding quality and efficiency are improved, and the application range is wide.

The invention discloses an air source heat pump unattended control method and system, and relates to the field of equipment control, and the method comprises the steps: predicting a load demand according to an environment parameter and a building load parameter, and calculating a target water supply temperature based on the load demand; sorting the heat pump units according to the equipment operation duration parameters, distributing a temperature deviation value for each heat pump unit, and calculating the target water supply temperature and the temperature deviation value corresponding to the heat pump unit to obtain the personalized set temperature of each heat pump unit; a starting instruction sequence is generated according to a preset starting condition and the personalized set temperature, and after the water return pressure parameter reaches a preset parameter threshold value after the circulating water pump is started, all the heat pump units are sequentially started according to the personalized set temperature sequence; and a make-up pump and a pressure release valve are controlled according to the return water pressure parameter and the liquid level parameter, and the temperature deviation value of each heat pump unit is adjusted according to the change of the environment parameter and the building load parameter. By implementing the method, the balance of equipment loads in the multi-unit system can be improved.

The invention provides an air source heat pump system. The air source heat pump system comprises a compressor, a fin heat exchanger, a shell tube heat exchanger and a gas-liquid separator, wherein the shell tube heat exchanger comprises a gas tube, a liquid tube, a heat exchange tube and a liquid separating device, the air source heat pump system further comprises a four-way valve, the four-way valve is correspondingly communication with the compressor, the gas-liquid separator, the fin heat exchanger and the gas pipe, the fin heat exchanger is in communication with the liquid separating device through a orifice plate and a first one-way valve; the fin heat exchanger is in communication with the liquid tube through an expansion valve and a second one-way valve; the first one-way valve is used for the one-way conduction of the fin heat exchanger to the liquid separating device; the second one-way valve is used for the one-way conduction of the liquid pipe to the fin heat exchanger. By the adoption of the system, a liquid storage device of the liquid refrigerant does not need to be added in the system, so that the cost is saved; a large amount of liquid refrigerant cannot flow back to the compressor after defrosting is finished; during the refrigeration mode, the refrigerant running shell pass does not need to be subjected to suction superheat, so that the air suction pressure and the operation efficiency of the refrigeration mode are improved; and the overall use valve of the system is less, and the reliability is high.

The invention discloses an air source heat pump control method and device for a magnetic suspension refrigeration compressor. Adjusting deviation mapping is generated by constructing a temperature response curve and a load demand curve and executing relevance evaluation, an out-of-tolerance mismatch window is detected, and load sudden change characteristics are extracted to determine an adjusting period; positioning an overlapping section in an adjusting period, establishing a refrigerant flow distribution grid to identify a cooperative constraint degree, executing resource conflict identification, marking conflict positions, generating comprehensive weights, and arranging the comprehensive weights in a descending order to form a scheduling sorting table to recombine a compressor operation time sequence; adjusting capacity is preset and fused with a temperature response curve to form an adjustable power range, an area with insufficient margin is identified, margin compensation parameters are generated, and a dynamic adjusting limit is determined; the method comprises the following steps: performing time sequence splitting on environment temperature change based on a dynamic adjustment limit to generate a sudden change component and a slow change component, respectively generating a compressor speed regulation sequence and a heat exchanger adjustment sequence, fusing and establishing a control instruction, and realizing supply and demand accurate matching, resource conflict resolution and dynamic response optimization.

The invention relates to the technical field of air source heat pumps, in particular to a start-stop balancing method, device and equipment for a compressor unit and a storage medium. Acquiring an environment temperature and a user set temperature; generating a thermal load demand signal according to the environment temperature and the user set temperature; generating an operation signal based on a preset thermodynamic model and the thermal load demand signal; performing type analysis on the operation signal; when the type of the operation signal is a slow loading operation signal, the compressor unit is controlled to perform scheduling operation; the accumulated operation time of the compressor unit is obtained, and the start-stop state of the compressor unit is controlled according to the accumulated operation time; when the type of the operation signal is a full-load operation signal, the compressor unit is controlled to perform full-load operation; start and stop of the compressor are controlled through reasonable scheduling and time accumulation, long-term high-load operation is avoided, abrasion of key parts is reduced, the service life of equipment is prolonged, maintenance cost is reduced, and meanwhile operation efficiency and system stability are improved.

The invention provides air source heat pump cold and warm air blower assembling equipment, and relates to the technical field of warm air blowers, the air source heat pump cold and warm air blower assembling equipment comprises a plurality of follow-up springs installed on the outer wall of a fixing sleeve at equal intervals, the follow-up springs are connected to a fitting wheel, a plurality of pressing rods are installed between the follow-up springs, and the pressing rods are connected to the fitting wheel. A plurality of telescopic grooves are formed in the side wall of the laminating wheel at equal intervals, a telescopic rod is slidably connected into each telescopic groove, a supporting spring is installed in each telescopic rod, a contact disc is installed on the supporting spring close to one side of the fixing sleeve, a stopping block is installed on the supporting spring on the other side, and a rotating mechanism driven by a motor is arranged on the stopping block. By means of the matched telescopic rod system, adjustment of the axial position and the circumferential angle is achieved, during axial adjustment, the stability of the adjusted position is ensured through the self-locking function of a worm gear and a worm, adjustment of the circumferential angle is achieved through running fit of an inner sleeve and an outer sleeve, and the adjustment process is smoother and more accurate through the design.

The invention relates to the technical field of heat pumps, in particular to an air source heat pump unit and a control method of the air source heat pump unit, the air source heat pump unit comprises a unit body, the unit body comprises a first heat exchanger, and a heat absorption channel of the first heat exchanger is provided with a first bypass port and a second bypass port; the circulating heating device comprises a second heat exchanger, a water outlet pipe and a water return pipe, the first bypass opening communicates with an inlet of a heat absorption channel of the second heat exchanger through the water outlet pipe, and an outlet of the heat absorption channel of the second heat exchanger communicates with the second bypass opening through the water return pipe. The circulating heating device serves as an external device of the unit body, it can be guaranteed that an internal water system can be subjected to temperature rise protection in time under the condition that the unit body stops, the unit body is protected against damage caused by freezing of the water system under the extreme condition, anti-freezing operation does not need to be conducted on the unit body under the specific starting condition, and temperature rise anti-freezing is conducted on the water system; the reliability of the air source heat pump unit is enhanced, and user loss is reduced.

The invention discloses a multi-energy complementary building energy supply system based on solar energy, and relates to the technical field of building energy supply, the multi-energy complementary building energy supply system comprises a solar photovoltaic panel, and an inverter is connected with a storage battery and an air source heat pump through wires. Light energy and wind energy are converted into electric energy through operation of the solar photovoltaic panel and the wind power generator, meanwhile, direct current provided by the solar photovoltaic panel and the wind power generator is converted into alternating current through the inverter, one part of the alternating current converted by the inverter supplies power to the air source heat pump, and the other part of the alternating current converted by the inverter is stored through the storage battery. Meanwhile, electricity stored in the storage battery can be supplied to the charging pile, when the air source heat pump is powered on to operate, energy can be supplied to the air conditioner through the heat storage tank and the cold storage tank, and when it is cloudy and rainy, power can be supplied to the air source heat pump through the storage battery; continuous and stable energy supply of the air source heat pump is achieved through cooperation of the solar photovoltaic panel, the wind power generator and the storage battery.

The invention discloses an air energy-soil composite heat pump cross-seasonal energy storage and winter combined heating system and an application method, and relates to the technical field of building energy conservation. Comprising the following steps: acquiring quantitative data of heat unbalance; when a heat unbalance phenomenon exists, determining a soil initial temperature and a maximum rising temperature before heat compensation, and calculating a heat compensation amount; determining a heat compensation operation time period and a system type selection of an air source heat pump; determining an initial rising temperature, a heat compensation initial investment and a preset age limit; the operation cost is determined, when the number of times of heat compensation is larger than a preset year limit, the sum of the initial investment of heat compensation and the operation cost within the preset year limit is recorded, and when it is detected that the total soil temperature increasing value is not lower than the maximum temperature increasing value, the air source heat pump system is determined again; and the strategy with the minimum operation cost and the minimum initial heat compensation investment is used as the optimal soil heat compensation strategy. The system obviously improves the utilization rate of renewable energy sources, and has the advantages of high energy efficiency, wide adaptability and low whole life cycle cost.