376results about How to "Prevent overcooling" patented technology

Compressor discharge air flows through a heat exchanger in heat exchange relation with cooling water and is supplied at reduced temperature in atomizing air and purge modes to combustors in a dual-fuel gas turbine. The heat exchanger has a pair of bypass passages in parallel with a temperature regulating valve controlling flow of water through the heat exchanger in response to the temperature of the compressor discharge air exiting the heat exchanger. Should the flow control valve close in response to low temperature of the compressor discharge air, in the air atomizing mode, the bypass passages with orifices therein provide a minimum protective flow of cooling water to the heat exchanger. In the purge mode where only half the air flow and heat rejection is required in the heat exchanger and the flow control valve closes, a bypass valve in one of the bypass passages closes to enable reduced flow of cooling water through the heat exchanger.

There are provided a reductant supply device and a control method for the reductant supply device, which can prevent heat damage of a reductant injection valve, and also prevent crystallization of urea solution due to excessive cooling of the solution reductant.The reductant supply device which is used in an exhaust gas purification device that injects and supplies, as a reductant, a urea solution to an exhaust gas upstream side of a reduction catalyst disposed in an exhaust gas passage of an internal combustion engine, and that reduces and purifies nitrogen oxides contained in exhaust gas using the reduction catalyst, the reductant supply device having a reductant injection valve that is fixed to an exhaust pipe on the exhaust gas upstream side of the reduction catalyst, includes: a cooling water circulation passage that circulates at least part of cooling water of the internal combustion engine to cool the reductant injection valve; flow rate control means for adjusting a flow rate of cooling water flowing through the cooling water circulation passage; temperature detection means for detecting a temperature of the reductant injection valve; and control means for controlling the flow rate control means based on the temperature of the reductant injection valve.

The invention relates to a refrigerator and a branched air-delivery device used for the refrigerator. The branched air-delivery device comprises a shell body, an adjusting part, a baffle and a linkage device. The shell body is provided with an air inlet and a plurality of air outlets. The adjusting part is rotationally arranged in the shell body and adjusts the air outlet area of each air outlet by masking the air outlet completely, masking the air outlet partly or exposing the air outlet completely at different rotation positions. The baffle is rotationally installed at the air inlet. According to the configuration of the linkage device, the rotary motion of the adjusting part is transmitted to the baffle to enable the baffle to move so that the air inlet can be opened or closed. The invention furthermore provides the refrigerator with the branched air-delivery device. According to the invention, the air inlet of the branched air-delivery device can be sealed completely when the storage room does not need cooling capacity, so that the air passage which provides cooling capacity to the storage room is blocked, and then the storage room is prevented from being too cold and the energy consumption can be reduced. Moreover, using the linkage device can make the control of the branced air-delivery device simpler and more accurate.

The invention discloses a preparation process of inorganic salt hydrate phase-change energy-storage material, comprises the following steps that adding 40-60g inorganic salt particles and 3-5g overcooling- resistance agent in 100g water, stirring and mixing to prepare hydrating inorganic salt solution, adding 5-10g poly-sodium acrylate in the hydrating inorganic salt solution, and stirring and mixing to prepare viscous hydrating inorganic salt mixed solution. The preparation process of hydrating inorganic salt phase-change material which is provided by the invention is added with overcooling- resistance agent and poly-sodium acrylate in the preparation process, which can effectively avoid the hydrating inorganic salt phase-change material from generating the phenomenon of over-cooling and phase separation in the phase change process, and ensures hydrating inorganic salt phase-change material to keep uniformity after repeated circulating.

A cylindrical steam reforming unit comprising a plurality of cylindrical bodies consisting of a first cylindrical body, a second cylindrical body and a third cylindrical body of successively increasing diameters disposed in a concentric spaced relation, a radiation cylinder disposed within and concentrically with the first cylindrical body, a burner disposed in the radial central portion of the radiation cylinder, and a reforming catalyst layer with a reforming catalyst filled in a gap between the first and second cylindrical bodies, wherein a CO shift catalyst layer and a CO removal catalyst layer are disposed in a gap between the second and third cylindrical bodies, the CO shift catalyst layer being formed in a gap with the direction of flow reversed at one axial end of the reforming catalyst layer and through a heat recovery layer of predetermined length. According to this reforming unit, without internally disposing a heat insulation layer, a cooling mechanism or the like, the reforming catalyst layer, CO shift catalyst layer, and CO removal catalyst layer can be integrated, achieving various useful effects, including size and weight reductions and the shortening of startup time.

A system and method is provided to control the operation of an HVAC system to remove humidity from an indoor air environment without cooling the indoor air environment. The system includes a thermostat that operates the HVAC system to remove humidity when the sensed humidity falls below a humidity set point. After operation of the HVAC system, the thermostat monitors whether the temperature within the indoor air environment falls due to the operation of the HVAC system. If the temperature within the indoor air environment falls consistently, the humidity control algorithm determines that the HVAC system cannot operate without cooling and prevents future operation of the HVAC system to provide only dehumidification. If, however, the humidity control algorithm determines that the HVAC system can operate to dehumidify without cooling, the humidity control algorithm operates the HVAC system accordingly.

An energy control system and control method for heating and cooling water circulation, relating to the control of a multi-user heating and cooling system and its corresponding water pump system with or without adjustment function in its terminal devices. It effectively solves the problems of heat energy waste and energy waste generated by water pump circulation. The present invention consists of heat source water supply and return pipelines, water pumps, VFD frequency converters, flowmeters, electric regulating valves, differential pressure sensors, temperature sensors, user terminals, and related control logic that can monitor the performance of the water pumps, start / stop the water pumps, and adjust the frequency of the water pumps. The controller composition. The implementation of the present invention can control the indoor temperature very well, improve the indoor comfort, avoid the overall overcooling or overheating phenomenon in the building room; and can reduce the waste of heat energy by 30%; reduce the energy waste of the circulating water pump by 70%-90% %.

A controlled rolling and controlled cooling system for bars comprises a first cooling section at the position of an outlet of an intermediate mill group, a machine cooling section of a finishing mill group, a second cooling section between the finishing mill group and a third flying shear, a third cooling section between the third flying shear and a cooling bed, a sensor module and a central control unit. The first cooling section, the second cooling section and the third cooling section respectively comprise one or a plurality of cooling lines arranged on a horizontal moving trolley and a bypass roll table, one cooling line or the bypass roll table can be selectively connected to a production line by horizontally moving the horizontal moving trolley, and every production line comprises one or a plurality of series connection coolers. Every cooler is connected to a water supply main pipe through one water supply branched pipe, control valves are arranged in the water supply branched pipes, and the coolers connected to the production lines are selected and used by opening and closing of the control valves. According to the controlled rolling and controlled cooling system, a plurality of cooling sections can be selected flexibly, the coolers in every cooling section can also be selectively used simultaneously, and accordingly the system not only is good in applicability, but also improves bar finished product performances.

The invention discloses a method and device for controlling operation of an air conditioner. The method comprises the steps that when the air conditioner receives an activating order of cold and hot senses, the air conditioner is controlled to operate for a preset duration in a preset operation mode; and the value of the cold and hot senses in the room where the air conditioner is located is obtained, and the air conditioner is controlled to operate according to an operating parameter corresponding to the range where the value of the cold and hot senses is. According to the method and device for controlling operation of the air conditioner, the operating parameter corresponding to the range where the value of the cold and hot senses is located is determined according to the value of the cold and hot senses truly reflecting cold and hot feeling of a user, and the air conditioner is controlled to operate according to the determined operating parameter, so that the air conditioner enables the adjustment of the temperature in the room to be closer to the true feeling of the user, the problem that the temperature in the room is too low or too high for the user is avoided, and the comfortable sensation of the user is improved.

A water jacket spacer has a spacer body molded in conformity to the shape of the water jacket and a regulating member whose one side is fixed to the spacer body. The regulating member is composed of a first member which is not water-swellable and is elastically deformable and a second member made of water-swellable elastomer which is integrally fixed to the first member. The regulating member lies in a state not-contacting an opposed wall of the water jacket when inserted into the water jacket together with the spacer body, whereas it blocks a part of cooling water flowing through the water jacket by deforming such that a side of the regulating member not fixed to the spacer body faces toward the opposed wall of the water jacket when the second member swells by absorbing cooling water flown into the water jacket and thereby the first member is elastically deformed.

A bubble separator is a cyclone-type bubble separator having a cooling mechanism (oil cooler) connected downstream thereof, and is provided with a relief mechanism that operates when the interior pressure in a main body increases. The fluid inside the main body escapes downstream of the cooling mechanism due to the operation of the cooling mechanism. In particular, preferably the relief mechanism is provided in a gas discharge portion that is connected to the main body.

Disclosed is an oil jet device for cooling a piston, including: an oil cooler 4 that is disposed upstream of an oil injection nozzle 8; an oil pump 5 that is disposed upstream of the oil cooler 4; a first switching adjustment valve 6 that is disposed between the oil injection nozzle 8 and the oil cooler 4 and adjusts a flow dividing ratio at which the cooling oil from the oil cooler 4 is distributed to the oil injection nozzle 8 side and to an oil pan side; and a control unit that has an oil quantity adjustment map 4 for switching the first switching adjustment valve 6 based on a piston temperature calculation map 20 for calculating the temperature of the piston 1 using detection values acquired respectively by a cooling water temperature sensor 35, a rotation speed sensor 36 and a load sensor 37.

The thermally insulated vest for use with a modified bait storing bucket is an improvement over existing bait buckets in that it includes a thermally insulated vest that adorns an exterior surface of the bucket. The thermally insulated vest is comprised of a plurality of layers consisting of a plastic mesh, foil liner, insulation, and gel pack. At least two freezer packs adorn an exterior surface of the thermally insulated vest, and aid in cooling the contents of the bucket. The bucket includes a drain hole and plug to evacuate fluids from within. A lid having a lid vent rests atop the bucket, and is secured thereon via securing means. The thermally insulated vest has a height less than the height of the vest.

The invention provides a single-system air-cooled refrigerator. The single-system air-cooled refrigerator comprises a freezing chamber and a refrigerating chamber; a drying chamber independent from the refrigerating chamber is arranged inside the refrigerating chamber; a temperature and humidity sensor is arranged inside the drying chamber; the drying chamber directly communicates with the freezing chamber through a connection air flue; a fan and a wind shield are arranged inside the connection air flue; when the temperature and / or humidity measured by the sensor are / is higher than the preset value, the fan is started and the wind shield is opened, so that dry cold air is conveyed into the drying chamber through the freezing chamber via the connection air flue; and when the temperature and / or humidity measured by the sensor are / is lower than the preset value, the fan stops, and the wind shield isolates the connection air flue. As the fan and the wind shield are arranged inside the connection air flue, air pressure of dry and cold airflow can be increased properly, and the effect of rapidly achieving temperature and humidity reduction of the drying chamber is achieved; and after the temperature and humidity inside the drying chamber reach the preset value, the fan stops timely, and too much dry and cold airflow is prevented from being injected into the drying chamber and causing too high coldness.

The invention relates to a die-casting mold multi-point precise temperature control system and a method. The invention is characterized in that the system comprises a plurality of temperature detectors which are embedded in a mold, each temperature detector is repetitively connected with an analog quantity input module through a compensating lead wire, the analog quantity input modules are connected with a central processing unit, the central processing unit is respectively connected with a human-machine interaction interface and a mold temperature controller, a plurality of oil inlet pipes and a plurality of oil outlet pipes are arranged on the mold temperature controller, and the oil inlet pipes and the oil outlet pipes are respectively communicated with a plurality of flow passages arranged on the mold for forming a cyclic circulation pipeline. The invention has ingenious structural design, can improve the repeatability of the mold temperature control in the die-casting process, can improve the production efficiency, and can be widely used in the temperature control process of the die casting production.

A vehicle air conditioner includes an air conditioning case, a blower fan for blowing conditioned air into a passenger compartment, and an evaporator disposed in the air conditioning case. The air conditioning case has a cooling opening upstream from the evaporator, so that at least inside air is blown by the blower fan to vehicle electronic units through the cooling opening. Thus, heat radiation of the electronic units can be facilitated by air blown from the blower fan. Further, because at least inside air, without being cooled by the evaporator, is blown to the electronic units, the electronic units can be prevented from being excessively cooled. Accordingly, it can restrict the surface temperature of the electronic units from reducing less than a dew point, thereby effectively reducing condensed water on the electronic units.

The invention relates to the technical field of engines, and discloses an engine cooling system. The engine cooling system comprises a main cooling fan, a main radiator, a controller, a temperature sensor, a secondary cooling fan and a secondary radiator, wherein the main radiator is communicated with a water chamber of an engine; the secondary radiator is communicated with the water chamber of the engine; the secondary cooling fan is arranged on a side face of the secondary radiator; a pipeline between the secondary radiator and the water chamber of the engine is provided with a switching valve; the temperature sensor is used for detecting water outlet temperature of the water chamber of the engine and transmitting a water outlet signal to the controller; the controller receives a water temperature signal and judges whether the water outlet temperature is greater than a preset value; and if the water outlet temperature is greater than the preset value, the controller controls the switching valve to be opened and controls the secondary cooling fan to be in a working state. The heat dissipating capacity of the engine cooling system is matched with that required by the engine.

The control of the coolant flow is accomplished through valving or by adjusting the pumping speed of a water pump and a water motor, or a combination of all three elements. During normal operation, where engine cooling is not required, the speed control coupling maintains a slow and constant water pump speed at all engine-operating speeds. The valve is maintained to stop coolant flow from entering the radiator while allowing coolant to flow through a heater. If engine cooling is required, the valve is actuated such that coolant is circulated to the engine and through the radiator. If air conditioning is required, the speed control coupling simply increases the water pump speed and the fan speed while the valve is set to bypass coolant flow to the engine. If air conditioning and engine cooling are required, the valve is actuated to allow coolant flow to the engine.

The invention discloses an air conditioner control method. The air conditioner control method comprises the following steps that the air return temperature and the air outlet temperature which are detected by an air conditioner are obtained, and the temperature difference between the air return temperature and the air outlet temperature is calculated, wherein the temperature difference is an absolute value of the difference value between the air return temperature and the air outlet temperature; the relation between the temperature difference and a preset temperature difference is compared; and when the temperature difference is not equal to the preset temperature difference, operation parameters of the air conditioner are adjusted according to the relation between the temperature difference and the preset temperature difference. The invention further discloses the air conditioner and a computer-readable storage medium. By setting the difference value of the air return temperature andthe air outlet temperature of the air conditioner, the air outlet temperature is controlled, and thus the situation that the undercooling or overheating temperature experience is brought for users isavoided.

A method of casting a directionally solidified (DS) or single crystal (SX) article with a casting furnace having a heating chamber (4), a cooling chamber (5), a separating baffle (3) between the both chambers includes a first step in which the shell mould (12) is filled with liquid metal (15), and the liquid metal (15) is directionally solidified by withdrawing the shell mould (12) from the heating to the cooling chamber (4, 5). An inert gas impinges from nozzles (8) arranged below the baffle (3) on the shell mould (12) and in steep transitions in outer surface area of the shell mould (12) the flow of the inert gas (9) is reduced or even stopped and when a protruding geometrical feature has passed the impingement area of the gas jets, the gas flow (9) is restored to a value adjusted to the geometry of the cast part presently passing the impingement area.

The invention provides an air guiding plate swing direction control method, an air guiding plate swing direction control device, a terminal, an air conditioner and an air guiding plate control system. The air guiding plate swing direction control method comprises the steps that at least one input swing angle of an air guiding plate is received; the swing angles are stored; when any one of the swing angles is triggered, the any swing angle is sent to the air conditioner connected with the terminal, and therefore the swing direction of the air guiding plate of the air conditioner can be controlled according to the any swing angle. By means of the technical scheme, the air guiding plate can automatically swing to the angle expected by the user according to the willing of the user, accordingly, wind blown out of an indoor unit can be blown to one fixed position according to the willing of the user, it is avoided that the user needs to repeatedly set the air feeding angle of the air guiding plate every time, and great convenience is brought to the user.

Disclosed is a temperature control method for a refrigerator which can minimize a deviation in refrigerant compartment temperature while minimizing the power consumption of the refrigerator. The temperature control method includes the steps of (A) comparing a sensed temperature of a freezing compartment with a predetermined maximum freezing compartment temperature and a predetermined minimum freezing compartment temperature, respectively, thereby controlling a compressor and a circulating fan to be turned on or off such that the sensed freezing compartment temperature is ranged between the predetermined maximum and minimum freezing temperatures, (B) comparing, following the step (A), a sensed temperature of a refrigerating compartment defined with a plurality of refrigerating chambers therein, with a predetermined maximum refrigerating compartment temperature and a predetermined minimum refrigerating compartment temperature, respectively, thereby controlling a damper to be opened or closed and the circulating fan to be turned on or off such that the sensed refrigerating compartment temperature is ranged between the predetermined maximum and minimum refrigerating temperatures, and (C) discharging cold air into at least one of the refrigerating chambers when the damper is closed, and the compressor and the circulating fan are turned on.

The invention discloses a water pump. The water pump comprises a pump body and a blade, wherein a part of the blade is arranged in the pump body, the blade is driven to be capable of moving relative to the pump body so as to enable a distance between one end of the blade located outside the pump body and the center of the pump body to be adjustable. By adjusting the distance between the outer end of the blade and the center of the pump body, centrifugal force provided by the water pump is changed, and further flow adjustment is achieved. For example, when the water pump is used for cooling an engine, the length of the blade extending out of the pump body can be adjusted according to the working condition of the engine, accordingly appropriate coolant flows can be obtained, the engine is fully cooled, engine overcooling or overheating phenomenon of the engine is avoided, and the service life of the engine is prolonged.

The invention provides an intelligent water mixing control device, an intelligent water mixing control device method and a water heater. The intelligent water mixing control device comprises a receiving unit, at least one hot-water water inlet, at least one cold-water water inlet, a detection unit and a controller, wherein the receiving unit is used for receiving an input set temperature; the at least one hot-water water inlet is used for providing hot water; the at least one cold-water water inlet is used for providing cold water; the detection unit is used for detecting the temperature of the hot-water water inlet, the temperature of the cold-water water inlet and the temperature of a mixed-water water outlet, and sending the multiple temperatures to the controller; the controller is used for controlling the water supply amounts of the hot-water water inlet and the cold-water water inlet according to the set temperature, the temperature of the hot-water water inlet and the temperature of the cold-water water inlet, so that the temperature of the mixed-water water outlet is equal to the set temperature; the hot-water water inlet, the cold-water water inlet and the mixed-water water outlet are connected in a three-way manner. With the adoption of the technical scheme, the intelligent adjustment of the water supply temperature can be realized; meanwhile, a water returning problem in the process of adjusting the water supply temperature is solved, and water resources and electric power resources are saved.

The invention relates to a bi-directional interaction human-computer interface of a building environment control system, which is characterized by comprising a frame body. A liquid crystal display touch screen is arranged on the frame body; a power supply and a communication interface are connected with the frame body; and a user subjective feeling input area for inputting various comfortable feeling buttons of a user, a user instruction input area for inputting various indoor environment control equipment instruction sliders, an environment state display area for displaying various environment parameters and a control equipment operation state display area for displaying various control equipment operation states are arranged on the liquid crystal display touch screen. Through the invention, the background control system can quickly provides a comfortable environment for the user according to the subjective feeling input by the user, and the user can acquire the feedback information such as the energy consumption state and the energy cost from the control system, thus the energy saving consciousness of the user can be aroused so as to avoid waste.

A refrigerator provided with: a storage chamber which is demarcated by thermally-insulated walls and a thermally insulated door, and which stores storage items; a cooler for cooling the storage chamber; a damper (12) which controls the amount of cold air provided to the storage chamber; the thermally insulated door which covers the storage chamber; and door open / closed detection units (13a-13d) which detect if the thermally insulated door is open or closed. The refrigerator is also provided with: a cooling fan (10) which supplies cold air to the storage chamber; a fan motor which drives the cooling fan (10); a rotation speed detection unit (15) for detecting the rotation speed of the fan motor; and an arithmetic control unit (14) which arithmetically processes the detection results from the rotation speed detection unit (15). Furthermore, the arithmetic control unit (14) estimates the storage amount of the storage chamber on the basis of the detection results from the door open / closed detection units (13a-13d) and the detection results from the rotation speed detection unit (15).

A vapor compression system includes a variable speed single stage compressor, a heat rejecting heat exchanger, an expansion device, and a heat accepting heat exchanger. The speed of the compressor is varied to control the refrigerant flow rate and match the cooling load requirements of the vapor compression system. A temperature sensor measures an air temperature in the refrigerated container. When the temperature sensor detects that the air temperature is above a threshold temperature, the microcontroller increases the speed of the compressor to increase the refrigerant flow rate and the cooling capacity of the vapor compression system. When the air temperature sensor detects that the air temperature is within a predetermined range from the set point temperature, the microcontroller sends a signal to slightly decrease the speed of the compressor, allowing fine adjustment of the cooling capacity of the vapor compression system to prevent overcooling of the refrigerated container.

The invention discloses an air conditioner adjusting method for dynamically maintaining the comfortable degree of a human body in a heating mode. The method comprises the following steps: S1, presetting a mapping relationship between a real-time environment temperature and a target comfortable degree, wherein the real-time environment temperature comprises a real-time outdoor environment temperature and a real-time indoor environment temperature, and the target comfortable degree comprises a target indoor environment temperature, a target indoor humidity, a target indoor wind speed, a target indoor oxygen content and a target noise decibel; and S2, detecting the real-time environment temperature, the real-time indoor humidity, the real-time indoor wind speed, the real-time indoor oxygen content and the real-time indoor noise decibel, and obtaining the target comfortable degree according to the preset mapping relationship and adjusting an air conditioner until the target comfortable degree is achieved. After the air conditioner is switched on, the environment temperature and the current indoor comfortable degree are detected in real time, and then the current indoor comfortable degree is adjusted to be the target comfortable degree, and the temperature is not needed to be set manually, so that circumstances such as overcooling, overheating and air-condition disease are avoided.

A water jacket spacer has a spacer body molded in conformity to the shape of the water jacket and a regulating member whose one side is fixed to the spacer body. The regulating member is composed of a first member which is not water-swellable and is elastically deformable and a second member made of water-swellable elastomer which is integrally fixed to the first member. The regulating member lies in a state not-contacting an opposed wall of the water jacket when inserted into the water jacket together with the spacer body, whereas it blocks a part of cooling water flowing through the water jacket by deforming such that a side of the regulating member not fixed to the spacer body faces toward the opposed wall of the water jacket when the second member swells by absorbing cooling water flown into the water jacket and thereby the first member is elastically deformed.