404 results about "Condensation temperature" patented technology

The invention relates to the technical field of air conditioner control, and provides an indoor radiation floor system multi-target regulation and control method and system based on load prediction. The method comprises the following steps: based on indoor environment parameters, outdoor environment parameters, indoor personnel activity information and equipment parameters, adopting a cold and wet load prediction model to obtain a cold load and a wet load; based on the outdoor environment parameters, the cold load, the wet load and the air conditioning system operation information, an indoor environment and energy consumption prediction model is adopted, and the indoor temperature, the condensation temperature difference, the air system energy consumption and the water system energy consumption are obtained; the outdoor environment parameters, the cooling load, the wet load and the air conditioner system operation information serve as variables, target functions of the indoor temperature, the air conditioner PMV, the condensation temperature difference, the air system energy consumption and the water system energy consumption are built, corresponding weights are configured, and a total target function is calculated; and working parameters of the air conditioning system are set as constraint conditions, the total objective function is solved, and optimal regulation and control parameters are obtained.

The invention provides an anti-condensation temperature and humidity regulation and control system and method for remote deep learning prediction aided decision making, and the method is characterized in that a field controller is connected with a temperature and humidity collection device, obtains the environment temperature and humidity, calculates the dew point temperature, obtains the surface temperature of a protected part, and starts and stops a heating and / or dehumidification device by comparing the difference between the two values with a preset threshold value; the temperature and humidity acquisition device acquires field environment temperature and humidity data for the field controller to calculate the dew point temperature, and the temperature and humidity acquisition device is also used for acquiring the surface temperature of the protected part; the heating device is used for raising environment temperature; the dehumidification device is used for reducing the environment humidity; the communication module is used for data transmission between the field controller and the remote prediction terminal, sending field data and receiving prediction information; the remote prediction terminal obtains field data through the communication module; an anti-condensation system structure combining local autonomous control and remote prediction assistance is established, and redundancy fault-tolerant capability is achieved; even if the remote prediction function fails, the field control can still operate independently and reliably.

According to the method for gradient separation of the heavy metal in the household garbage incineration fly ash, the composition and content of the household garbage incineration fly ash are detected in advance, and grinding pretreatment is conducted on the household garbage incineration fly ash; a plurality of reaction temperature intervals corresponding to various heavy metals in the household garbage incineration fly ash are arranged in a heating furnace, the household garbage incineration fly ash is subjected to multi-stage heating roasting, and chlorine element compounds contained in the household garbage incineration fly ash react with the heavy metals under the high-temperature condition to be volatilized, so that heavy metal chloride gas is obtained; a certain amount of protective gas is introduced into the heating furnace in each reaction temperature interval to prevent the unvolatilized heavy metal chloride from being oxidized, and finally all heavy metals are successfully separated out; a plurality of condensation temperature sections are arranged in the sectional condensation pipe, heavy metal chloride is recycled step by step at different condensation temperatures, and separation and recycling of different heavy metals are achieved; according to the scheme, complex operation procedures can be avoided, energy consumption is reduced, and the method has remarkable economic and social benefits and wide application prospects.

The invention discloses a polar region water area temperature difference energy control method and a power generation device, and belongs to the technical field of temperature difference energy power generation. The control method comprises the steps that under the condition that the net output power of the power generation device is maximum, the optimal parameter sequence of different cold and heat source working conditions is determined; constructing an MPC prediction model by taking the rotation speed of a working medium pump and the rotation speed of an expansion machine as input parameters and the evaporation temperature and the condensation temperature as output results according to the incidence relation between the pressure of the cycle working medium and the evaporation temperature and the condensation temperature; constructing a target function according to the optimal parameter sequence and an output result of the MPC prediction model; and based on the MPC prediction model and the target function, the MPC prediction model is iteratively updated by adjusting the rotating speed of the working medium pump and the rotating speed of the expansion machine, the optimal rotating speed of the working medium pump and the optimal rotating speed of the expansion machine are determined, and the operation parameters of the power generation device are controlled. The operation parameters of the power generation device are adaptively adjusted through the working conditions of the cold and heat sources, so that the net output power of the power generation component is maximum, and the power generation efficiency is improved.

The invention discloses a split-flow type flexible dynamic green ammonia synthesis system which comprises a synthesis gas compressor unit, a recycle gas compressor unit, a hot gas-gas heat exchanger, an ammonia synthesis tower, a water cooler, a cold gas-gas heat exchanger, at least one ammonia cooler and an ammonia separator, the method is characterized in that the feed gas is divided into two streams, one stream enters the hot gas heat exchanger to exchange heat with the reacted synthesis gas, and the other stream directly enters the ammonia synthesis tower through a first shunting pipeline to adjust the temperature of a bed layer in the ammonia synthesis tower. The condensation temperature of the synthesis gas, including the condensation temperature of the synthesis gas at the outlets of the water cooler, the cold gas heat exchanger and the ammonia cooler, is adjusted step by step according to the operation load condition of the device, so that the ammonia content in the synthesis loop is controlled step by step, the loop circulation gas amount is adjusted step by step, and the stable fluctuation of the pressure of the ammonia synthesis loop is maintained; and flexible dynamic operation of the device is realized.

Provided are a low-energy-consumption control method for a heat pump low-temperature dryer, an electronic device, and a storage medium, belonging to the technical field of heat pump control. The present method, by means of controlling a compressor operating point and dehumidification performance of an evaporator, can achieve the goal of reducing overall device energy consumption. In a heat pump unit, the compressor, a condenser, an expansion valve and the evaporator are connected in sequence to form a refrigeration circulation loop; the compressor operating point comprises evaporation temperature and condensation temperature. First, an operating point with a COP value larger than a set value when preset evaporation temperature and condensation temperatures are satisfied is selected as an optimal operating point for the compressor. Then, structural design of the heat exchanger is conducted, so that a heat exchange volume of the heat exchanger can satisfy the requirement that the compressor operates at the optimal operating point. During operation of the heat pump low-temperature dryer, the operating state of the heat pump unit is dynamically adjusted in real time, so that the compressor is kept running at the optimal operating point.

The utility model provides a metal arsenic purification device, which relates to the technical field of metallurgical equipment, and comprises a heating furnace body and a condensation module, the heating furnace body is used for arranging raw materials and heating the raw materials to sublimate the raw materials, the condensation module is communicated with a steam outlet of the heating furnace body, and the condensation module comprises a plurality of condensation units arranged in sequence. At least part of the condensation units are tubular condensers, each tubular condenser comprises a plurality of detachable condensation pipes which are arranged in parallel, and the condensation pipes are formed by rolling metal sheets. Due to the fact that a condensation area is long during vacuum sublimation condensation of the metal arsenic, the metal arsenic purification device provided by the utility model adopts a plurality of condensation units to condense the arsenic, a temperature gradient is formed in the condensation module, and according to the difference of saturated vapor pressure and condensation temperature, the purity of the metal arsenic in each condensation unit is different, so that graded purification is realized; and the condensation pipe is rolled by the metal sheet, and after condensation is finished, the condensation pipe is taken out and unfolded, so that arsenic removal can be realized, and the arsenic removal efficiency is high.

A method and system for modulating vapor and liquid fractions of a cycling liquid-vapor fluid operating within its phase transition envelope by creating forced oscillating heat transfer between liquid and vapor fractions of the cycling stream. A liquid stream segment is expansion cooled and brought into thermal communication with a vapor stream segment. The contact with the expansion-cooled liquid enables intermolecular forces to drive condensation and release condensation heat at a condensation temperature higher than the temperature of the expansion-cooled stream segment. The resulting temperature gradient enables the expansion-cooled segment held at constant volume to capture the condensation heat and isochorically vaporize into a vapor stream segment that again is forced to condense so as to form an oscillating thermal cycle within the cycling liquid-vapor fluid.

The invention provides a cooling system, a cooling method and a heat pump unit. The cooling system comprises a cooler, an oil circulation loop, a first motor cooling loop, a second motor cooling loop and a refrigerant purifier. Supplementary water enters the cooler to cool a heat exchange coil in the cooler, the heat exchange coil is connected into an oil circulation loop and a first motor cooling loop, and the oil circulation loop is used for circularly conveying lubricating oil to cool a compressor bearing. The first motor cooling loop is used for conveying a liquid refrigerant to cool a compressor motor; the supplemented water in the cooler continuously enters the refrigerant purifier and is used for condensing the refrigerant and separating non-condensable gas in the refrigerant; and the second motor cooling loop is connected with the refrigerant purifier and is used for conveying a refrigerant to cool the compressor motor. By arranging the cooling system, the problem that the high-temperature heat pump is not suitable for a conventional cooling system due to too high condensation temperature is solved, the heat exchange effect of the unit is guaranteed, and the reliability of the unit is improved.

The embodiment of the invention relates to the technical field of air conditioner control, and discloses a rotating speed control method of an air conditioner outer fan, a controller, an air conditioner and an energy storage system. Then, the exhaust pressure value, the environment temperature value and the condensation temperature value of the air conditioner are collected, and the rotating speed of an outer fan of the air conditioner is controlled based on the abnormal conditions of the exhaust pressure value, the environment temperature value and / or the condensation temperature value; according to the rotating speed control method provided by the embodiment of the invention, the rotating speed of the air conditioner outer fan can be adjusted based on different pressures and temperatures in the air conditioner, the method can adapt to various different complex scenes, and it is ensured that the air conditioner outer fan can operate in an accurate and stable state under most conditions.

The utility model discloses a gas conveying device and process equipment of a semiconductor device. The device comprises a first group of gas paths, the gas inlet end of which is connected with a carrier gas source and a TEOS (tetraethyl orthosilicate) source and is used for transmitting a first group of gas comprising carrier gas and TEOS; the gas inlet end of the second group of gas paths is connected with a supplementary gas source, and a second group of gas including supplementary gas is transmitted; the gas inlet end of the third group of gas paths is connected with the ozone source and transmits a third group of gas containing ozone; the gas inlet ends of the gas mixing parts are respectively connected with the gas outlet ends of the first group of gas paths, the second group of gas paths and the third group of gas paths, so that the first group of gas, the second group of gas and the third group of gas in equal proportion are obtained and mixed, and the mixed gas is averagely distributed to the corresponding treatment stations in the reaction cavity from the gas outlet ends of the gas mixing parts for a deposition process. According to the utility model, the distribution uniformity of a plurality of groups of process gases can be improved, so that the film thickness difference of each treatment station is reduced, the condensation temperature of TEOS (tetraethyl orthosilicate) can be improved, and the film particle pollution is improved.

The invention discloses an industrial dangerous waste liquid treatment whole-process intelligent control method and system based on digital twinning, and relates to the technical field of intelligent control, and the method can recognize the sudden change trend of a liquid level and bubbles in real time through a tension field twinning mapping prediction model and the calculation of a bubble form volatilization unsteady state index. Based on a standard data set collected in real time, when the liquid level has an abnormal sudden change trend, early warning can be performed in advance, and a linkage control strategy is automatically triggered. For example, when the liquid level sudden change pre-judgment index R exceeds a safety threshold value, bubble evaporation twinborn prediction is automatically triggered, and control means such as stirring speed reduction and condensation temperature adjustment are executed. According to the intelligent control based on digital twinning and twinning feedback, the reaction environment in the waste liquid treatment process can be accurately controlled, the risk that the reaction is out of control is greatly reduced, lagging reaction and misoperation in a traditional method are avoided, and continuous and stable reaction process is ensured.

A heat pump system according to an aspect of the disclosed invention may comprise: a compressor that compresses a refrigerant; a water heat exchanger in which heat is exchanged between the compressed refrigerant and introduced water; an expansion valve for expanding the refrigerant condensed in the water heat exchanger; an outdoor heat exchanger in which heat is exchanged between the refrigerant expanded by the expansion valve and outdoor air; a high-tension pressure sensor that detects the temperature of the refrigerant to be condensed in the water heat exchanger; a discharged water temperature sensor that detects the temperature of water on which heat exchange has been performed in the water heat exchanger; and a control unit that determines a target condensation temperature of the refrigerant on the basis of a detection result of the discharged water temperature sensor, compares the target condensation temperature with the current condensation temperature detected by the high-tension pressure sensor, and controls the degree of opening of the expansion valve according to the comparison result.

The invention discloses a large-scale cruise ship water chilling unit pipe network cold storage intelligent energy-saving control method based on double-layer deep reinforcement learning, which comprises the following steps: 1, carrying out inherent cold storage engineering modeling on a chilled water pipe network of a water chilling unit to obtain an energy balance relationship between equivalent cold storage capacity and cold release sustainable time of the pipe network and bearable cold capacity; the relationship is used as a physical prior to introduce strategy learning and a security boundary; 2, constructing a double-layer deep reinforcement learning architecture; 3, a safety layer is additionally arranged in the double-layer deep reinforcement learning architecture, the safety layer cuts and projects output feasible regions of a target layer and a sublayer through a hard constraint and barrier mechanism, the water supply temperature, the temperature difference, the start-stop interval, the condensation temperature and the power change rate are ensured, and the maritime affair safety requirement is met; and 4, on the basis of a pipe network inherent cold storage model, a double-layer deep reinforcement learning framework and a safety layer, peak load shifting control of low-load cold charging-high-load cold discharging is achieved, and unit cold energy consumption of the water chilling unit is reduced.

The invention discloses a precise temperature controller and a dynamic control method thereof.The precise temperature controller comprises a refrigerating unit, a precise temperature control unit and a multi-parameter decoupling controller, and a cooling water outlet of an evaporator in the refrigerating unit, the precise temperature control unit and a cooling water inlet of the evaporator are connected in a circulating mode; the precise temperature control unit comprises an auxiliary water tank, a main water tank, a constant-temperature water tank, an electromagnetic valve, an electric heater, a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor and a refrigerating unit. The electric heater of the precise temperature control unit, the control end of the electromagnetic valve, the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected with the parameter decoupling controller. The Smith predictor and the fuzzy PID are coupled for control, the rotating speed of the compressor and the opening degree of the electronic expansion valve are adjusted and corrected, condensation temperature dynamic optimization and water temperature fine adjustment control are combined, and the method has the advantages of being high in precision, quick in response and high in robustness.

The utility model belongs to the technical field of electronic special material manufacturing, and particularly relates to a novel silane energy-saving production device which comprises a gas phase entering tower, the gas phase entering tower is connected with a first compressor and a first condenser through a pipeline, and the first compressor is connected with the first condenser through a pipeline. The right end of the first condenser is connected with a second compressor through a pipeline, and the second compressor is connected with a fourth compressor, a second heat exchanger and a third tower through pipelines. According to the device, a compressor pressure-increasing condensation theory is added, and gaseous compression pressure-increasing condensation is added between series disproportionation reactions to gradually purify a silane mixed raw material; the operation cost is reduced by increasing the condensation temperature and reducing the coolant requirement, and meanwhile, the efficiency of the tower is improved by feeding gaseous silane mixed gas for the first time, so that the loss of the whole system is reduced.

The invention discloses a condensation pressure reference control method and device for an ammonia absorption type refrigeration system. The method comprises the following steps: establishing an absolute physical reference, namely a target condensing pressure, determined by ammonia physical properties, wherein the value is uniquely determined at a given condensing temperature; the condensing pressure is detected in real time; and with approaching as a target, working condition parameters of the ammonia purification device are adjusted, so that the purity of ammonia vapor entering the evaporator is close to 100%. The device is an electronic control or self-operated machine. According to the method, the condensing pressure is increased to be an active physical reference based on the double-rigidity constraint of fixed ammonia charge and determined condensing pressure, so that the system automatically approaches to a theoretical optimal state in a wide temperature range, the rectification fault risks such as tower flooding and tower flushing are remarkably reduced, the energy efficiency is improved, and the method is suitable for industrial waste heat recovery, refrigeration houses and other scenes.

The invention discloses an operation control method for a direct expansion type refrigerating unit. The operation control method comprises the following steps that firstly, whether a compressor breaks down or not is detected; step 2, detecting whether frequency reduction protection is needed or not; 3, calculating a load according to a PID algorithm; fourthly, the direct expansion type refrigerating unit is controlled to operate according to detection and calculation results in the first step to the fourth step; by automatically adjusting the frequency of the compressor, the problems of part damage and large air outlet temperature fluctuation caused by frequent starting / stopping of the direct expansion section can be avoided, automatic operation of the direct expansion type air conditioning unit system can be achieved in the stopping state, loading or frequency reduction is carried out on the compressor by calculating the load, and the working efficiency is improved. The stability of the system and the operability of the unit system are improved; the rotating speed of the condensation fan / the evaporation fan is controlled through the condensation temperature and the evaporation temperature, the indoor temperature is accurately controlled, temperature fluctuation is reduced, meanwhile, the service life of the compressor can be prolonged, intelligent operation control is provided, and the operation process is simplified.

Disclosed is a segregating gas arrangement that generally comprises a gas segregation chamber, at least one cooling plate in the gas segregation chamber, and a carbon adsorber in an adsorption gas capturing chamber. The gas segregation chamber has a rim that when resting atop regolith defines a first interior environment. The cooling plates are in the gas segregation chamber, wherein the cooling plates are maintained at a first temperature above 5° K, which is a condensation temperature that higher temperature condensing gases will condense. The adsorption gas capturing chamber defines a second interior environment that is in communication with the first interior environment. The carbon adsorber is in the second interior environment and is maintained at a second temperature below 3° K. The carbon adsorber is configured to capture the low temperature condensing gas.

The invention provides a temperature control system and method for underground pipe gallery concrete construction, and relates to the technical field of intelligent construction.The method includes the steps that environment data of a concrete construction area are collected and preprocessed and analyzed, and a concrete condensation temperature index, a construction environment quality index and a construction energy efficiency index are generated; and comprehensively obtaining a temperature control index, and determining a temperature control target parameter of concrete construction so as to generate a construction standard value. And on this basis, a temperature control adjustment strategy is formulated, corresponding parameter adjustment is performed on the construction equipment, the generated operation standard value is compared with the temperature control index, and if the set standard is not reached, the adjustment process is repeated until the temperature control index meets the requirement. According to the invention, the temperature management optimization in the concrete construction process is realized through the technical means of environmental data acquisition, pretreatment analysis, dynamic temperature control adjustment and the like.

The invention discloses a control method of an energy storage water chilling unit, electronic equipment, a system and a readable medium. A water outlet temperature sensor is arranged in a water outlet pipeline, and a water return temperature sensor is arranged in a water return pipeline; under the condition that the energy storage water chilling unit is controlled to be in a starting control stage and a preset starting control period is reached, a target algorithm is determined from a first preset algorithm and a second preset algorithm according to the current environment temperature, the current water outlet temperature, the current water return temperature and the current condensation temperature of the starting control period; determining a first target exhaust temperature according to a target algorithm; adjusting a return water temperature correction coefficient in a second preset algorithm according to the current return water temperature of the operation control period and the return water temperature before the first preset duration under the condition that the energy storage water chilling unit is controlled to be in the operation control stage and the preset operation control period is reached; and a second target exhaust temperature is determined according to the adjusted second preset algorithm. And the safety, the stability and the control effect are obviously improved.

The invention provides an automatic air suction control method and system based on air pressure difference, and the method comprises the steps: collecting historical environment temperature, condensation temperature and air suction power data, and constructing a mapping relation of environment temperature-condensation temperature and air suction power under different condensation temperature systems; the air pressure change rate under the same condensation temperature system and the temperature change rates under different condensation temperature systems are obtained; calculating a wind pressure sensitive threshold value and a temperature sensitive threshold value according to the wind pressure change rate and the temperature change rate, and determining a target condensation temperature under different condensation temperature systems according to the sensitive threshold values; and a balance critical value is calculated according to the target condensation temperature and the air pressure sensitive threshold value, the target air suction power at the target condensation temperature is determined based on the balance critical value, and the target air suction power is continuously updated. The air suction power can be automatically adjusted to maintain the flue gas purification effect, manual adjustment of a user is not needed, and the user experience is improved.

The invention relates to the technical field of seawater bromine extraction production, and discloses a seawater bromine extraction production line digital management method and system, and the method comprises the steps: collecting and integrating meteorological ocean data, raw material seawater real-time components, a process sensor network and equipment state data in real time, and forming a four-dimensional data set; constructing the four-dimensional data set into a graph structure, excavating a nonlinear coupling relationship among seawater characteristics, process parameters and equipment efficiency based on the graph structure, establishing a coupling analysis model, and pre-judging a fluctuation condition through the coupling analysis model; the condensation temperature and the tail gas bromine concentration are monitored in real time, and a multi-layer LSTM network model is adopted to predict the optimal value of the steam consumption; constructing a digital twinborn model of the production line, and simulating and predicting the production process in the digital twinborn body by using a model prediction control algorithm to obtain a predicted production result; when the deviation between the predicted production result and the actual production data exceeds a set threshold value, a DQN algorithm is adopted for intelligent regulation and control; according to the invention, the efficiency and precision of production management are improved.

The invention discloses a control method of a heat pump system, the heat pump system and a storage medium. The heat pump system comprises a refrigerant circulation loop, the refrigerant circulation loop comprises a compressor and an energy storage device, the energy storage device is used for storing energy flowing through a refrigerant, and the method comprises the steps that the first condensation temperature of the heat pump system and the first temperature of the energy storage device are obtained; frequency control parameters of the compressor are determined according to the first condensation temperature and the first temperature of the energy storage device; and the compressor is controlled to operate according to the frequency control parameters. The invention aims to improve the energy efficiency of the heat pump system provided with the energy storage device.

The invention relates to the field of engine intake and exhaust system control, in particular to an EGR system control method, a vehicle, electronic equipment and a storage medium. The EGR system comprises an EGR waste gas temperature adjusting unit and an EGR valve, wherein the EGR waste gas temperature adjusting unit is connected with the EGR valve through a pipeline; the EGR system control method comprises the steps that the condensation temperature threshold value of temperature-adjusted waste gas is obtained, and the temperature-adjusted waste gas is waste gas exhausted by an engine with the temperature adjusted through an EGR waste gas temperature adjusting unit; determining the condensation risk degree of the temperature-adjusted waste gas based on the condensation temperature threshold value and the temperature of the temperature-adjusted waste gas; if the condensation risk degree belongs to the first condensation risk grade, the cooling degree of waste gas exhausted by the engine is lowered through an EGR waste gas temperature adjusting unit; if the condensation risk degree belongs to a second condensation risk level, the opening degree of the EGR valve is controlled to be reduced; wherein the second condensation risk grade is higher than the first condensation risk grade. According to the method, generation of condensate water can be accurately prevented, and the high EGR rate is guaranteed as much as possible.

The invention belongs to the technical field of heat pump system modeling, and particularly relates to a heat pump modeling method based on black box model and white box model coupling, which comprises the following steps: inputting structure parameters, working condition parameters and setting parameters of a heat pump system; determining an initial population of the evaporation temperature and the condensation temperature based on a meta-heuristic intelligent algorithm; determining state parameters of the working medium at different temperatures and pressures; calculating the heat exchange area of the heat exchanger based on a white box model and black box model coupled hybrid model; whether convergence conditions are met or not is judged, and if the convergence conditions are not met, evaporation temperature and condensation temperature populations are regenerated through an intelligent solver based on a meta-heuristic algorithm; if the convergence condition is met, a calculation result is output, and calculation of the heat pump system performance is completed. By coupling the black box model and the white box model, the prediction precision of the heat pump system is remarkably improved.

The application discloses a kind of switch cabinet purification method, system, device, storage medium and computer equipment.The method comprises: obtaining the environmental information of all grid spaces pre-divided in switch cabinet, wherein each grid space has the same spatial complexity;Based on the environmental information of each grid space, determine the condensation temperature threshold and particulate matter deposition threshold corresponding to each grid space, and monitor the temperature information and particulate matter concentration information of each grid space;Determine whether the temperature information of each grid space is less than or equal to the condensation temperature threshold corresponding to the grid space, and whether the particulate matter concentration information is greater than or equal to the particulate matter deposition threshold corresponding to the grid space;If the temperature information is less than or equal to the condensation temperature threshold and / or the particulate matter concentration information is greater than or equal to the particulate matter deposition threshold, then perform environmental purification work on the switch cabinet.The above method can greatly improve the environmental purification effect of switch cabinet.

The invention provides a thermal management system and method for automobile exhaust gas recirculation and an automobile, the thermal management system comprises a heat exchanger, a first pipeline, a second pipeline and a regulating pipeline group, the heat exchanger is provided with a first port and a second port, the first pipeline is provided with a first multi-way valve, the first port is communicated with a first interface of the first multi-way valve, the second pipeline is provided with a second multi-way valve, and the regulating pipeline group is communicated with a second interface of the second multi-way valve. The second port is communicated with the first interface of the second multi-way valve, and the adjusting pipeline group is respectively communicated with the first multi-way valve and the second multi-way valve; according to the technical scheme, the heat exchanger at least has the beneficial effects that by arranging the adjusting pipeline set, the liquid inlet direction of the heat exchanger can be adjusted, so that the heat exchange efficiency is adjusted, the liquid inlet direction in the heat exchanger is adjusted to be reverse under the condition that the temperature is extremely low, the heat exchange efficiency is improved, and the heat exchange efficiency is improved. The heat exchange efficiency of the heat exchanger is reduced, the waste gas condensation temperature is further reduced, and the use temperature range of the waste gas recirculation system is enlarged.

The invention discloses an operation control method of a heating and ventilation system, the heating and ventilation system and related equipment. The heating and ventilation system comprises a heat source unit, a heat storage module and a control unit. Wherein the heat storage module is provided with a phase change material and at least one temperature sensor, and the heat source unit is connected with the heat storage module through an energy charging flow path. The control unit determines the target condensation temperature of the heat source unit based on the temperature, detected by the temperature sensor, of the phase change material when the heat storage module is charged; and controlling the compressor frequency of the heat source unit based on the target condensation temperature. In this way, the system can effectively improve the operation efficiency and the energy utilization rate, and meanwhile the stability and reliability of the system are ensured.

A heat pump system according to an aspect of the disclosed invention may include: a compressor for compressing a refrigerant; a refrigerant-water heat exchanger performing heat exchange between the compressed refrigerant and the introduced water; an expansion valve for expanding the refrigerant condensed in the refrigerant-water heat exchanger; an outdoor heat exchanger performing heat exchange between the refrigerant expanded by the expansion valve and outdoor air; a high-pressure sensor for sensing a high-pressure saturation temperature of the refrigerant compressed in the compressor; the water inlet temperature sensor is used for sensing the temperature of water entering the refrigerant-water heat exchanger; the condensation temperature sensor is used for sensing the temperature of the refrigerant condensed in the refrigerant-water heat exchanger; the outdoor temperature sensor is used for sensing the outdoor temperature; the control component determines the reference supercooling degree of the refrigerant based on the sensing results of the outdoor temperature sensor and the water inlet temperature sensor and the operation frequency of the compressor, determines the current supercooling degree of the refrigerant based on the sensing results of the high pressure sensor and the condensation temperature sensor, and compares the reference supercooling degree with the current supercooling degree. To determine whether there is a refrigerant leak.