4004 results about "Cold medium" patented technology

The invention discloses an energy-saving control method and system based on a large refrigeration house, and the method comprises the steps: S1, obtaining cargo attribute information in real time through a cargo label, and inputting a dynamic load prediction model to generate a cooling capacity demand prediction signal in a future time period; s2, generating a multi-device cooperative control signal based on the cooling capacity demand prediction signal in the future period; s3, a shelf-level cooling capacity demand distribution signal is generated in combination with the cooling capacity demand prediction signal; s4, generating a directional cold airflow path signal matched with goods shelf distribution according to the goods shelf level cold capacity demand distribution signal; and S5, closed-loop feedback adjustment is conducted on the compressor frequency, the refrigerant flow and the air valve opening through an edge calculation module, and a dynamic balance control instruction of cooling capacity supply and space distribution is generated. The intelligent air quality monitoring method and system based on sensing data feedback can solve the problems of excessive refrigeration energy consumption waste caused by inaccurate cold capacity demand prediction of a large refrigeration house and extra energy loss caused by low cooperative efficiency of multiple devices.

The invention discloses a temperature swing adsorption helium low-temperature purification system which comprises a vacuum cold box, and a first-stage dividing wall heat exchanger, a liquid cold medium Dewar, a high-temperature area adsorption unit, a second-stage dividing wall heat exchanger, a cold head heat exchanger and a low-temperature area adsorption unit are sequentially connected in the vacuum cold box in the gas transmission direction. Wherein the input end of the first-stage dividing wall heat exchanger is connected with the outside through a pipeline, and is used for introducing crude helium; the high-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being greater than or equal to 77K in the crude helium, and the low-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being 20K-30K in the crude helium, so that high-purity helium is obtained. According to the invention, not only can high-flow high-component impurity gas with the boiling point of 77K or above be treated, but also high-flow high-component impurity gas with the boiling point of 30K or below can be treated, and high-flow multi-component high-concentration industrial production working conditions can be better matched by adopting physical adsorption of the high-temperature and low-temperature region adsorbents.

The invention provides a cold-chain logistics multi-modal management method and system based on artificial intelligence, and the method comprises the steps: carrying out the dynamic monitoring and prediction of multi-modal environment parameters inside and outside a cold-chain container, and obtaining an environment parameter change prediction result within a preset time range; according to the environmental parameter change prediction result and the logistics route, the rotating speed of a compressor, the opening degree of an expansion valve and the refrigerant proportion of the refrigerating system are dynamically regulated and controlled, and a refrigerating strategy of the refrigerating system is obtained; based on a refrigeration strategy and a logistics route, the activation opportunity and proportion of the phase change material are calculated and controlled, and a temperature control scheme considering phase change point deviation under different altitude air pressures is obtained; and performing multi-mode dynamic management on the cold-chain logistics process according to the temperature control scheme and the refrigeration strategy. According to the method, complex environment changes in the multimodal transportation process can be effectively coped with, the refrigeration strategy and phase change material use are dynamically adjusted, and the quality and reliability of cold-chain logistics are improved.

The invention discloses heat pump equipment and a hot water heating system, and belongs to the technical field of household appliances. The heat pump equipment comprises a box body, a heat pump assembly, a fan assembly, a pipeline assembly and an electric control box, the heat pump assembly comprises a compressor, a first heat exchanger, a second heat exchanger and a refrigerant pipeline, an inner cavity of the box body is divided into an air inlet cavity and an air outlet cavity through the first heat exchanger, and the compressor, the second heat exchanger, the pipeline assembly and the electric control box are arranged in the air inlet cavity; the fan is arranged in the air outlet cavity, the refrigerant flow path, the compressor and the first heat exchanger are connected through a refrigerant pipeline to form a refrigerant circulation loop, and the second heat exchanger is connected with the water pump, the water inlet pipe and the water outlet pipe through a water flow pipeline to form a water supply pipeline. In addition, the pipeline assembly is arranged on the front side of the refrigerant pipeline, maintenance is more convenient, and the working efficiency is effectively improved.

The utility model relates to a reaction device capable of quickly heating, cooling and maintaining temperature. According to the reaction device, a three-way valve temperature control device consisting of a set of thermal medium circulator, a set of cold medium circulator, a control unit and two temperature control adjusting motor control three-way valve rotating devices is arranged on the reaction kettle, so that the temperature of the reaction kettle of the reaction device can be increased or decreased within half a minute (even shorter time); the problem that the reaction kettle cannot be rapidly heated and cooled in the reaction process is solved; for heat absorption and heat release experiments, the dynamic balance of the temperature can be maintained by setting a fixed reaction temperature; installation is simple, and operation is convenient; the problem of waste of water resources is solved; the temperature control range is wide, and when a water medium is used, the temperature control range is 1-95 DEG C; when a silicone oil medium is used, the temperature control range is-50 to 250 DEG C; the rotatable distillation head is mounted at the upper part of the reaction kettle and is directly rotated during use, so that the functions of condensation reflux and distillation extraction can be simultaneously realized.

The invention discloses a novel energy storage vehicle-mounted refrigerator and a control method, and relates to the technical field of refrigeration. The device comprises a box body, a novel energy storage heat exchange system and a control system, the novel energy storage heat exchange system comprises an energy storage body containing a cold storage medium; the cooling channel penetrates through the air duct system of the energy storage body; the heat exchange part is communicated with the vehicle-mounted refrigerating system and comprises a first heat exchange structure in contact with the cold storage medium; and the air guide part drives air to flow through the cooling channel. The first heat exchange structure is provided with a channel and / or a heat exchange piece used for circulating a refrigerant of the vehicle-mounted refrigerating system, and the first heat exchange structure is used for efficiently transmitting the cooling capacity of the refrigerant of the vehicle-mounted refrigerating system to the cold storage medium and / or transmitting the cooling capacity to air through the wall of the cooling channel. Optionally, a second heat exchange structure is arranged in the cooling channel to further strengthen heat exchange of the air. By optimizing the heat exchange structure, the efficiency of refrigerating and cold accumulation by using the vehicle-mounted refrigerating system is improved.

The invention provides a fan coil control method and device, a medium, a fan coil and an air conditioning system. The control method of the fan coil comprises the steps that an indoor return air enthalpy value and a target enthalpy value are obtained; acquiring a required cold air ratio according to the indoor return air enthalpy value and the target enthalpy value; and the air supply amount of the fan coil is controlled according to the required cold air ratio and the refrigerant cold supply amount of the fan coil, so that the difference value between the real-time cold air ratio and the required cold air ratio of the fan coil is adjusted to be within the preset difference value range. By means of the technical scheme, the technical problem that in the prior art, a fan coil is poor in use comfort can be solved.

The utility model discloses a cooling air cooling system for glass tempering. The cooling air cooling system comprises a heat exchange air bellow, a primary heat exchanger and a secondary heat exchanger, an input port of the heat exchange air bellow is used for communicating with an output port of the fan, and an output port of the heat exchange air bellow is used for communicating with a cooling air input port of the air grid quenching section; the first-stage heat exchanger and the second-stage heat exchanger are installed in the heat exchange air box, the first-stage heat exchanger is close to an input port of the heat exchange air box, and the second-stage heat exchanger is close to an output port of the heat exchange air box. The temperature of the refrigerant circularly flowing in the second-stage heat exchanger is lower than the room temperature and lower than the temperature of the cooling water circularly flowing in the first-stage heat exchanger; the first-stage heat exchanger and the second-stage heat exchanger are used for exchanging heat with cooling air input into the heat exchange air box and making the temperature of the cooling air output by the heat exchange air box lower than a set temperature threshold value, and the temperature threshold value is not higher than the room temperature. Through heat exchange, the temperature of cooling air output by the heat exchange air box is lower than the room temperature.

The invention discloses an air conditioner, a defrosting method of the air conditioner and a controller of the air conditioner, the air conditioner is provided with a bypass pipeline, an outdoor heat exchanger is divided into a plurality of sub heat exchangers, one end of the bypass pipeline is connected with an exhaust port of a compressor through a refrigerant main path, and the other end of the bypass pipeline is divided into a plurality of refrigerant branch paths correspondingly connected with the sub heat exchangers; under the defrosting working condition, by controlling the first throttling assembly in the bypass pipeline and selecting the different sub heat exchangers to communicate with the exhaust port of the compressor, all the sub heat exchangers can be defrosted in sequence, so that the defrosting area of the air conditioner in the defrosting process is reduced, and the defrosting efficiency of the air conditioner is improved. The method is beneficial for the compressor to build the exhaust pressure, so that the operation power of the compressor is improved, more defrosting heat can be supplied, the defrosting time is finally shortened, and efficient and rapid defrosting is achieved.

The utility model relates to the technical field of welding pipe devices, and in particular to a rapid cooling device for a welding pipe machine. Its technical solution includes a side ring, a welding machine, a motor, a second sleeve ring, a welding gun and a screw. The outer wall of the side ring is provided with support rods distributed in an annular array, and the support rod is provided with a first sleeve ring and a second sleeve ring. The first sleeve ring is provided with a screw hole, and a screw is rotatably inserted in the screw hole. A clamping block is provided at the lower end of the screw. A motor is provided between the support rods. The outer side of the second sleeve ring is connected to a ring seat, and the inside of the ring seat is respectively penetrated by a first sleeve ring and a second sleeve ring. A conveying pipe is inserted in the first sleeve ring, and a nozzle is provided at one end of the conveying pipe, and a welding gun is inserted in the second sleeve ring. The utility model uses the self-rotating second sleeve ring to perform annular self-propelled welding on the clamped pipe, and the end face after welding is cooled by the automatically transported cold medium, which solves the problem of slow natural cooling and reduced welding surface quality.

The invention relates to an energy efficiency optimization method for a dynamic load of a central air conditioner, which comprises the following steps of: establishing a response relationship among a cold and heat source, a transmission and distribution system and end equipment, identifying a nonlinear decoupling characteristic of a cold and heat response behavior by monitoring operation deflection of each level of equipment under a low-load working condition, and defining and updating a cooling capacity response deviation threshold in real time; on the basis of the cooling capacity response deviation threshold, delay compression control is conducted on response actions of the refrigerant side and the air medium side, and by adjusting the air side response time sequence in advance, dynamic thermodynamic equilibrium is formed between refrigerant transfer delay and air medium response in advance; by establishing the response relationship among the cold and heat source, the transmission and distribution system and the end equipment and introducing a cold capacity response deviation threshold dynamic updating mechanism, nonlinear coupling mismatch in a cold and heat transmission chain can be accurately identified, so that the system is more flexible to operate under low-load and variable-load conditions, frequent start and stop or redundant operation of the cold and heat source is avoided, and the system reliability is improved. And therefore, the overall COP value of the system is remarkably increased, and unit cooling capacity consumption is reduced.

The invention discloses a defrosting control method and device and a heat pump system.The method comprises the steps that S1, a first operation parameter is detected in a defrosting mode, whether a first defrosting condition is met or not is judged, if yes, the defrosting mode continues to be operated, and if not, a heating mode continues to be operated; and S2, in the heating mode, detecting a second operation parameter and whether the second operation parameter meets a second defrosting condition or not, if yes, operating the defrosting mode and returning to the step S1, counting the number of times that the first defrosting condition is not met, and if the number of times that the first defrosting condition is not met exceeds a first preset number of times, controlling the heat pump system to stop and sending out a fault prompt. Whether the heat pump system is abnormal or not is preliminarily judged by detecting the water inlet and outlet temperature difference and the refrigerant inlet and outlet temperature difference of the water side heat exchanger in the defrosting mode, and then the abnormal condition of the heat pump system is further confirmed by combining the water inlet and outlet temperature difference of the water side heat exchanger during operation of the heating mode, so that the abnormal condition can be found in time, defrosting is stopped, and the heating efficiency is improved. And icing or damage of the water side heat exchanger is reduced.

The invention relates to the technical field of automatic control, in particular to a low-temperature control system of a centrifugal variable-frequency magnetic suspension water chilling unit, which comprises an environment heat parameter detection module, a condensation pressure deviation identification module, a condensate water flow rate regulation and control module, a refrigerant flow evaporation linkage module and an energy consumption curve dynamic construction module. According to the method, the inlet and outlet water temperature of the condenser and the external air temperature are collected, and synchronous filing and water temperature difference rate normalization processing are combined, so that when the external temperature changes drastically, the abnormal trend of water temperature change lag can be captured in time, and the condensation instability risk is pre-judged in advance; based on local pressure change rate gradient density analysis, abnormal fluctuation of condensation pressure is precisely discriminated, the problem that the local instability risk is covered by a global mean value is avoided, and the early warning timeliness is improved; the flow speed of condensate water is dynamically adjusted according to condensation instability characteristics, PID dynamic correction is conducted by extracting the rotating speed and flow speed error of a water pump, it is ensured that the heat exchange performance of a condenser continuously meets the low-temperature change requirement, and the condensation pressure stability is remarkably improved.

The invention discloses an air conditioner and a control method of the air conditioner, and the air conditioner comprises a heat exchange flow path on which a living water tank is placed, and the heat exchange flow path is used for realizing heat exchange between the living water tank and a refrigerant circulation flow path; the control valve group is arranged on the refrigerant circulating flow path and is used for opening or closing the refrigerant circulating flow path; the controller is connected with the control valve group and the four-way valve, the controller is configured to obtain a target operation mode of the air conditioner, and the target operation mode is any one of a heating mode, a refrigerating mode or a water heating mode; according to the target operation mode, the on-off states of the control valve set and the four-way valve are controlled so as to adjust the indoor temperature or adjust the water temperature of the living water tank, the air conditioner can meet the requirements of a user for refrigeration, heating and water heating, waste heat generated during refrigeration or heating is fully used for making hot water, and therefore environmental thermal pollution is reduced, and the energy consumption of the air conditioner is reduced. And energy waste in the operation process of the air conditioner is avoided.

The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a throttling assembly and a refrigerant circulation loop, and the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; a main channel is arranged at one end of the distributor, a plurality of branch channels communicated with the main channel are arranged at the other end of the distributor, the main pipeline is connected to the main channel, and the flow dividing pipelines are connected to the branch channels; the distributor comprises an inner-layer pipe and an outer-layer pipe, the outer-layer pipe is provided with a plurality of outer flow guide holes distributed at intervals in the circumferential direction, and the inner-layer pipe and the outer-layer pipe can rotate between a first relative position and a second relative position. The air conditioner has the advantages of being even in refrigerant distribution, compact in structure, capable of improving heat exchange performance and the like.

The utility model discloses a novel efficient energy storage air cooling air conditioning system which comprises a compressor, a three-phase heat exchanger I, a three-phase heat exchanger II, an outer fan, an inner fan, a capillary tube, a water pump, an expansion kettle, a drying tank and an air bellow. A first cavity and a second cavity which are independent are formed in the air bellow, an inner fan and a three-phase heat exchanger II are arranged in the first cavity, and an outer fan and a three-phase heat exchanger I are arranged in the first cavity; on the basis, a refrigerant circulation system and a cooling water circulation system are constructed. According to the air cooling system, the refrigerant circulation system or the cooling water circulation system can be selected to work in time according to the temperature of the external environment and the return air temperature of the air bellow, so that the heat dissipation requirement of the air cooling system under the condition that the environment temperature is high can be met, and meanwhile the use frequency of the compressor is reduced when the environment temperature is low; power consumption is reduced and system efficiency is improved.

The present invention discloses a gas-liquid separation structure, a heat exchanger and an air conditioner. The gas-liquid separation structure comprises a separation chamber, an inlet for a gas-liquid two-phase fluid, a first gas outlet and a liquid outlet, wherein the first gas outlet is located on the upper side of the liquid outlet, and a gas branch flow path and a liquid branch flow path are arranged in the separation chamber, wherein the first end of the gas branch flow path is connected to the inlet, and the second end extends upward and is connected to the first gas outlet, and the first end of the liquid branch flow path is connected to the inlet, and the second end extends downward and is connected to the liquid outlet. The liquid outlet of the gas-liquid separation structure is connected to the inlet manifold of the heat exchanger, and the first gas outlet is connected to the outlet manifold of the heat exchanger through a gaseous refrigerant flow path. The technical solution provided by the present invention is that a gas-liquid separation structure is arranged in front of the inlet manifold of the heat exchanger, so that the two-phase refrigerant can be separated, and the separated liquid refrigerant can be evenly distributed among a plurality of refrigerant heat exchange flow paths, thereby improving the heat exchange efficiency of the heat exchanger.

The invention relates to the technical field of air conditioners, particularly provides an air conditioning system and a control method thereof, and aims to solve the problems that condensation is easily generated and the temperature is too high to facilitate heat dissipation in an existing refrigerant heat dissipation mode. In order to achieve the purpose, the air conditioning system comprises an outdoor heat exchanger, a control valve, a refrigerant radiator, a throttling element and an indoor heat exchanger which are sequentially connected. The refrigerant radiator is used for radiating a driving module of the air conditioning system; the air conditioning system further comprises a first temperature detection piece which is arranged on the side, close to the control valve, of the refrigerant radiator and used for detecting the temperature of the refrigerant flowing to the refrigerant radiator or flowing out of the refrigerant radiator. The opening degree of the control valve is adjusted in the refrigeration mode, the opening degree of the throttling element is adjusted in the heating mode, and the temperature of the throttling element and the control valve is controlled in the defrosting mode, so that the temperature is higher than the dew point temperature and lower than the temperature of the driving module; therefore, the driving module can be cooled, and condensation can be avoided.

The present application provides a two-phase cold plate liquid cooling system and a control method. According to the present application, for parts which are cooled in series by the two-phase cold plate liquid cooling system, after a first evaporator cools a previous part, on the basis of the heat transfer requirements of a part cooled by a second evaporator, the quality of a refrigerant output from the first evaporator is adjusted to prevent the quality of the refrigerant from being too low or too high, and thus the refrigerant entering the second evaporator has proper quality, namely, the refrigerant entering the second evaporator has proper boiling point and heat exchange capacity, so that corresponding parts can be cooled to proper temperature, and large temperature difference between upstream and downstream parts is avoided. The solution solves the problem of the temperature of downstream parts in the series being lower than the temperature of upstream parts in the series, improves the temperature uniformity of multiple parts cooled in series, and then solves the problems of pressure oscillation, circulation stagnation and circulation reverse flow in the system, greatly improving the temperature uniformity of heat sources connected in series and the reliability of a series-parallel system.

The utility model provides a heat exchanger assembly and an air conditioner, the heat exchanger assembly comprises an evaporator assembly and a surface air cooler assembly, refrigerant is introduced into a heat exchange tube of the evaporator assembly, chilled water is introduced into a heat exchange tube of the surface air cooler assembly, and the evaporator assembly and the surface air cooler assembly are connected into a whole. The evaporator assembly is located at the upstream position of the surface air cooler assembly in the air flowing direction, when chilled water is mainly used for refrigeration, the surface air cooler assembly works, the evaporator assembly does not work, and air passes through the evaporator assembly to be not cooled and then passes through the surface air cooler assembly to be cooled. According to the utility model, the refrigeration effect is not worsened under the condition that the energy efficiency and the refrigeration performance are considered at the same time, and the required refrigeration effect is ensured.

The invention relates to the technical field of refrigeration, in particular to a heat exchange device and an air conditioning system. The heat exchange device comprises a shell assembly, a refrigerant assembly and a partition assembly, an air inlet and an air outlet are formed in the shell assembly, an airflow cavity arranged in the first direction is formed in the shell assembly and communicates with the air inlet and the air outlet, and the first direction is the direction from the air inlet to the air outlet; the refrigerant assembly comprises a plurality of refrigerant pipelines arranged in the airflow cavity in a penetrating mode, the separation assembly is arranged in the airflow cavity and divides the airflow cavity into at least two airflow channels which are separated from each other, the refrigerant pipelines are arranged in each airflow channel, and the number of the refrigerant pipelines in any two airflow channels is different. According to the heat exchange device in the embodiment, the airflow cavity is divided into the multiple independent airflow channels through the separation assemblies, disordered flowing of airflow in the heat exchange device is avoided, and therefore the contact efficiency of the airflow and the refrigerant pipeline is improved.

The invention provides a system and method for improving the ability of activated carbon to adsorb medium and low temperature VOCs waste gas, and the system comprises: a heat exchanger for introducing steam heat of the medium and low temperature VOCs waste gas to perform waste heat recovery to generate high temperature circulating water; the refrigerating system is used for receiving the high-temperature circulating water through a pipeline and recovering heat of the high-temperature circulating water to enable the refrigerating system to generate a refrigerant, and the refrigerant enters the heat exchanger to exchange heat with the medium-low-temperature VOCs waste gas; the activated carbon fixed bed adsorption device is used for receiving the medium and low temperature VOCs waste gas after heat exchange and adsorbing organic gas in the waste gas; the steam thermal desorption device is used for introducing steam into the activated carbon fixed bed adsorption device for desorption after the activated carbon fixed bed adsorption device is saturated in adsorption, and the steam takes away the organic gas adsorbed by the activated carbon fixed bed adsorption device and enters a downstream phase change heat exchanger; and the phase change heat exchanger is used for recycling steam heat after analysis by using circulating water to generate high-temperature circulating water, and after heat is recycled, waste gas is condensed, so that organic gas is dissolved in water to form an organic solvent to be recycled.

Disclosed is a hydraulic module, comprising a housing, a water pump, a heat exchanger, an electric control box, and a first panel. The housing defines an accommodating cavity. The water pump is arranged in the accommodating cavity. The heat exchanger is arranged in the accommodating cavity, and comprises a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline is configured to be connected to the water pump. The second heat exchange pipeline is configured to be connected to a refrigerant loop of an air conditioner, and perform heat exchange with the first heat exchange pipeline. The electric control box is arranged in the accommodating cavity, and is electrically connected to the water pump. The first panel is detachably connected to the housing, and seals the accommodating cavity. The hydraulic module further comprises a display panel assembly. The display panel assembly is electrically connected to the electric control box. The display panel assembly is located on the side of the first panel facing away from the housing, and is detachably connected to the first panel.

The utility model discloses an air conditioning system matched with a cryogenic liquid gasification process. The air conditioning system comprises a first gasifier, a liquid outlet pipe, an air supply pipe, a cooling liquid supply pipe, a cooling liquid return pipe, a heat exchanger, a fan, a controller, an environment temperature sensor, a circulating liquid inlet pipe, a circulating liquid outlet pipe, a cooling liquid supply source, a cooling liquid temperature sensor and a circulating pump. The air conditioning system can utilize cold energy generated by gasification of cryogenic liquid to refrigerate, is particularly suitable for cryogenic liquid tank trucks using the cryogenic liquid as power fuel, can replace a traditional vehicle-mounted air conditioner to refrigerate, can also realize a heating function, eliminates a high-power-consumption part, namely a compressor, necessary for conventional vapor compression refrigeration cycle, and is energy-saving and environment-friendly. Therefore, the energy consumption can be greatly reduced, and considerable energy-saving and emission-reducing benefits are brought; and only cooling liquid is used as a refrigerant medium for transferring cold energy, the functions of cooling, heating and cryogenic liquid gasification of the air conditioner can be achieved only through one medium, the structure is simple, and the cost is low.

The invention provides a heat exchanger and energy storage equipment. The heat exchanger comprises a refrigerant base plate, a plurality of condensation plate heat exchangers and a plurality of evaporation plate heat exchangers, and each condensation plate heat exchanger and each evaporation plate heat exchanger are arranged on the same side of the refrigerant base plate in the first direction. The side face, facing the refrigerant base plate, of each condensation plate exchanger comprises a refrigerant inlet and a refrigerant outlet, the side face, facing the refrigerant base plate, of each evaporation plate exchanger comprises a refrigerant inlet and a refrigerant outlet, and the refrigerant base plate comprises two condensation refrigerant flow channels and two evaporation refrigerant flow channels. One of the two condensation refrigerant flow channels is used for being communicated with a refrigerant inlet of each condensation plate heat exchanger, and the other condensation refrigerant flow channel is used for being communicated with a refrigerant outlet of each condensation plate heat exchanger. One of the two evaporation refrigerant flow channels is used for communicating with the other condensation refrigerant flow channel and a refrigerant inlet of each evaporation plate heat exchanger, and the other evaporation refrigerant flow channel is used for communicating with a refrigerant outlet of each evaporation plate heat exchanger. The refrigerating capacity of the heat exchanger can be improved.

The invention provides a self-control energy-saving water cooling device of a central air conditioner, and relates to the technical field of air conditioner cooling. The self-control energy-saving water cooling device of the central air conditioner comprises a frame and further comprises two sets of cold and hot medium circulating systems and a water tank assembly which are fixedly installed on the frame, and the two sets of cold and hot medium circulating systems are connected with the upper end and the lower end of the water tank assembly respectively. The heating assembly and the refrigerating assembly are installed on the water tank assembly. According to the self-control energy-saving water cooling device of the central air conditioner, by arranging the cold and hot medium circulating system and the water tank assembly, the effect of saving energy and cooling the central air conditioner is achieved, no additional water source is needed, pollution of condensate water to the pipeline is lower, it is guaranteed that the self-control energy-saving water cooling device can still be used in cooperation with an existing central air conditioner outdoor unit under the condition that a cooling fan is not additionally arranged, and the service life of the central air conditioner is prolonged. According to the central air conditioner, secondary utilization of wind power can be achieved, the energy-saving and cooling effects are achieved, and the refrigerating assembly is arranged, so that the effect that the central air conditioner always operates with small energy can be achieved.

The utility model discloses a multi-system water chilling unit which comprises at least two heat exchange systems, at least two waterway systems and a combined heat exchanger, and the heat exchange systems can be combined to form or respectively form an independent heat exchange circulation loop by switching the serial or parallel connection state and the opening or closing state of the combined heat exchanger; the water path system can be combined to form or respectively form an independent water circulation loop, so that the heating or refrigerating capacity of the unit is obviously increased; different heat exchange circulation loops are switched and controlled by adjusting refrigerant flowing paths between the multiple heat exchange systems and the combined heat exchanger, and different water circulation loops are switched and controlled by adjusting water medium flowing paths of the multiple water path systems. Therefore, after the water chilling unit is installed, different operation modes can be selected and switched according to different heat or cooling capacity requirements, hot water or cold water with the corresponding capacity and temperature is produced, the heating or cooling capacity of the unit is matched with the actual requirement, the whole equipment or part of elements do not need to be replaced, cost is low, and maintenance is convenient.

The invention provides an ammonia flash steam reliquefaction system for realizing cold energy supply, the reliquefaction system comprises an ammonia fuel cabin, an ammonia gas storage tank, a compressor, a condenser pipe, a cooling tank and other devices which are connected in sequence, ammonia gas flowing out of the ammonia fuel cabin is converted into high-pressure liquid ammonia after being compressed and condensed, and the high-pressure liquid ammonia is divided into three branches after flowing out through a cold heat exchanger, the first branch flows into the cooling tank after being depressurized and cooled by the high-pressure throttle valve, so that the interior of the cooling tank is cooled; the second branch is depressurized and cooled by a refrigeration storage throttle valve and then enters a liquid ammonia evaporator in the refrigeration storage, so that the refrigeration storage is cooled; and the third branch flows back to the ammonia fuel cabin after being depressurized and cooled by a back-to-cabin throttle valve. And meanwhile, the liquid ammonia in the cooling tank is also used for cooling the refrigerant water, so that the refrigeration of a user room is realized. According to the reliquefaction system, cold energy contained in high-pressure liquid ammonia in the reliquefaction process is fully utilized, different refrigeration schemes are made according to the refrigeration house and the user room, and the whole pipeline design is more reasonable.

The invention discloses a cryogenic reliquefaction device utilizing natural gas cold energy. The cryogenic reliquefaction device comprises a compressor, an expansion machine and a motor used for driving the compressor and the expansion machine to rotate. The compressor is sequentially connected with the water cooler, the backheating heat exchanger, the expansion machine and the supercooling heat exchanger through pipelines to form a cooling loop; a cooled loop is formed between the supercooling heat exchanger and the liquefied natural gas storage device; at least one refrigerant side inlet of the backheating heat exchanger is communicated with the liquefied natural gas storage device, and an outlet of the backheating heat exchanger is communicated with the boil-off gas collecting facility. When the reliquefaction device works, natural gas cold energy can be fully utilized, part of heat exchange loss of the heat exchanger is offset, the inlet and outlet temperature of the compressor is improved, the compression efficiency is greatly improved, meanwhile, the use amount of cooling water can be reduced, and therefore the comprehensive efficiency of the reliquefaction device is improved. And the device has high economic and practical values in occasions where natural gas is needed.

The invention relates to the technical field of heat pump heating equipment, and particularly discloses miniaturized heat pump heating equipment which comprises a shell, an air outlet assembly and a cooling assembly, the shell is provided with a cavity, an air outlet communicating with the cavity and the external environment is formed in the top of the shell, and the air outlet assembly is arranged on the upper portion of the shell and is opposite to the air outlet; the cooling assembly is used for driving fluid to flow from the cavity to the external environment, the cooling assembly is vertically arranged, the horizontal section is in an n shape, the cooling assembly is connected with the shell, the cavity communicates with the external environment, and the cooling assembly is used for absorbing heat through refrigerants so as to heat the refrigerants. The lateral air inlet and outlet heat pump has the effect of improving the problem that an existing lateral air inlet and outlet heat pump is low in heat exchange efficiency in a narrow space.