43 results about "Freeze stat" patented technology

The invention provides a freezer-free liquid nitrogen artificial ground freezing method and belongs to the technical field of artificial ground freezing. According to the method, construction drilling, namely primary drilling is carried out at first, and then freezing of a drilled hole and the ground surrounding the drilled hole is carried out by inserting a liquid nitrogen injection pipe into the drilled hole; after muddy water in the drilled hole formed through primary drilling and the surrounding ground are frozen, secondary drilling construction is carried out, a stable channel is formed, and liquid nitrogen is injected continuously to achieve ground freezing; and after the range, temperature and strength of frozen soil meet design requirements, liquid nitrogen injection is stopped, and freezing is completed. According to the method, the characteristics of low temperature and quick freezing of the liquid nitrogen are fully used, the ground is frozen in a forced mode, conditions are provided for secondary drilling dry operation, a natural liquid nitrogen heat exchange space is formed in the ground after secondary drilling, the liquid nitrogen makes direct contact with the soil, and higher heat exchange efficiency and higher freezing speed can be obtained. The links of machining, producing and installing traditional freezers are omitted, material is saved, cost is reduced, and the construction progress is improved.

A method of controlling and enhancing the nucleation of product in a freeze dryer, wherein the product is maintained at a predetermined temperature and pressure in a chamber of the freeze dryer, and a predetermined volume of condensed frost is created on an inner surface of a condenser chamber separate from the product chamber and connected thereto by a vapor port. The condenser chamber has a predetermined pressure that is greater than that of the product chamber. The opening of the vapor port into the product chamber creates gas turbulence that breaks down the condensed frost into ice crystals that rapidly enter the product chamber for even distribution therein to create uniform and rapid nucleation of the product in different areas of the product chamber.

An auxiliary coolant system, for a fuel cell stack system, includes a reversible coolant pump, a control valve, and plumbing lines. The pump enables the reversal of the coolant flow direction in the fuel cell stack system. The auxiliary coolant system is in parallel with the primary coolant system, and communicates with the primary coolant system via valves. During start-up, when coolant flow is from right-to-left through the fuel cell stack system, one valve of the primary coolant system will be partly open and control the amount of cold coolant make-up from the primary coolant system to the fuel cell stack while the valve of the auxiliary coolant system will be controlling the temperature differential between the inlet and outlet of the stack.

The invention relates to the field of refrigeration control, in particular to a method for judging a freezing point according to food volume, a controller and refrigeration equipment. According to themethod for judging the freezing point according to the food volume, the controller and the refrigeration equipment disclosed by the invention, whether food gets into a frozen state or not is judged by utilizing that the volume of the food is different at different temperature. Food temperature is controlled to be within a reasonable range by combining the volume change of the food with temperature control. If the food gets into the frozen state, the refrigeration equipment can enter a warming-up mode immediately to stop a process that water in the food continues to form ice crystals, so thatthe food cannot be frozen; when food temperature reaches a certain value, the food is cooled immediately; the cooling process and the warming-up process are repeated for multiple times in such a manner, so that the food temperature keeps at 0 DEG C to freezing point temperature most of the time or all the time, while the freezing point temperature is between -10 DEG C and 0 DEG C. The freezing point of the food is effectively judged by utilizing the change rate of the food volume; the volume change in the food and the temperature control are effectively controlled to reasonably control the food temperature to reach a critical state that the food is not frozen but fresh, and therefore the food is enabled to be not frozen but fresh, the fresh-keeping period is effectively prolonged, and thefood maintains nutritive and delicious.

A method of controlling and enhancing the nucleation of product in a freeze dryer, wherein the product is maintained at a predetermined temperature and pressure in a chamber of the freeze dryer, and a predetermined volume of ice fog is created in a condenser chamber separate from the product chamber and connected thereto by a vapor port. The ice fog has a predetermined pressure that is greater than that of the product chamber, and is rapidly conveyed through the vapor port into the product chamber for even distribution therein to create uniform and rapid nucleation of the product in different areas of the product chamber.

The invention relates to the field of refrigeration control, in particular to a method for determining a freezing point based on unfrozen moisture of food, a controller and refrigeration equipment. According to the invention, different unfrozen moisture contents of the food at different temperatures are used to judge whether the food enters a frozen state or not. The unfrozen moisture is combinedwith temperature control to control food temperature within a reasonable range all the time. If the food enters the frozen state, a warming-up mode can be entered immediately to prevent water inside the food from forming ice crystals continuously, so that the food is not frozen, and when the temperature of the food reaches a certain value, the temperature is immediately lowered repeatedly for multiple times, the food temperature is kept to 0 DEG C to the freezing point temperature for most of the time or all the time, and the freezing point temperature is within minus 10 to 0 DEG C. The percentage content change rate of unfrozen water in the food is used to effectively determine the freezing point of the food, unfrozen moisture changes in the food are effectively combined with the temperature control, and the food temperature is reasonably controlled to reach a critical state in which the food is not frozen and fresh so as to ensure that the food is not frozen and fresh and prolong thepreservation period.

The invention relates to the technical field of refrigeration, in particular to a method for judging freezing point by food smell change, a controller and a refrigeration device. The content of smellmolecules volatilized from food at different temperatures is used for judging whether the food is frozen or not. The percentage composition of the smell molecules is combined with temperature controlto control food temperature always in a reasonable range. If the food is frozen, the food can immediately enter a temperature-returning mode to prevent water in the food from continuing to form ice crystal to prevent the food from freezing. When the food temperature rises to a certain temperature, the temperature is immediately reduced, again and again, the food temperature is most of the time oralways remained at 0 DEG C-the freezing point temperature, and the freezing point temperature is at minus 10 DEG C-0 DEG C, the food temperature is reasonably controlled to reach a non-frozen and fresh critical state, and the food is kept not frozen and fresh, the preservation cycle is extended.

The invention provides an online monitoring method for the freezing state of an air-cooling island. The online monitoring method comprises an air-cooling island freezing state monitoring system and anair-cooling unit freezing prediction method, wherein a hardware part of the air-cooling island freezing state monitoring system comprises a steam turbine exhaust pipeline, each air cooling unit temperature measuring point system, a monitoring data measuring device, a data processing server and a monitoring platform; and a software part of the air-cooling island freezing state monitoring system comprises freezing coefficients and the parameter real-time computing of the condensed water subcooling degree. The invention provides a supply and demand heat transfer balance-based freezing coefficient computing method based on a freezing state online monitoring system of an air cooling unit. By comparing the heat transfer capability of a heat release side and a heat absorption side, the tendencyand degree of freezing of a heat exchange tube bundle can be predicted in essence; and a composite freezing pre-warning system based on the freezing coefficients of supply and demand heat transfer balance, the condensed water subcooling degree and the vacuum pumping temperature of a countercurrent section effectively improves the accuracy and operational flexibility of the anti-freezing adjustmentof a unit and guarantees the safety and high efficiency of the operation of the unit in winter.

The invention relates to the field of refrigeration control, in particular to a method, a controller and refrigeration equipment for judging a chill point according to changing of food colors. Whetherfood is under the refrigeration condition can be judged according to color difference values of surface colors of the food at the various temperatures. The colors of the food and the temperature control are combined to control food temperature to be always in the rational range. If the food is under the refrigeration condition, temperature recovery mode is initiated to prevent internal water of the food from continuously forming ice crystal to enable the food to be not refrigerated, the temperature is decreased when the food temperature reaches one value and is repeated multiple times, the food temperature is moestly or always maintained at the temperature of 0 DEG C-chill point temperature, the chill point temperature is at the temperature of minus 10-0 DEG C, the food temperature is rationally controlled to reach an unfreezing and fresh critical state, unfreezing and fresh of the food can be guaranteed, and the fresh period can be prolonged.

The invention relates to a slip stream for a r reliable anode to cathode flow in freeze conditions. A device and a method for ensuring proper fuel cell system warmup or shutdown during freeze conditions are provided. A three-way valve is used in conjunction with a flow-controlling orifice to ensure that the orifice avoids ice blockage during frozen conditions. Dry, warm air is delivered as a slip stream under pressure to a cathode flowpath, where the construction of the orifice is such that it is structurally compliant to promote flexing in response to the pressurized slip stream, thereby helping to break up any small amount of ice that may have formed in or on the orifice.

A method of controlling and enhancing the nucleation of product in a freeze dryer wherein a product is maintained at a predetermined temperature and pressure. A mixture of water vapor and CO2 gas is introduced into a condenser chamber separate from the product chamber to create a predetermined volume of condensed frost, ice and dry ice crystals on an inner surface of the condenser chamber. The condenser chamber is connected to the product chamber and has a predetermined pressure that is greater than that of the product chamber. Upon the opening of the condenser chamber into the product chamber, gas turbulence is created that causes the condensed frost in the form of an ice fog and accompanying ice and dry ice crystals to rapidly enter the product chamber for even distribution therein to create uniform and rapid nucleation of the product in different areas of the product chamber.

The invention discloses a tunnel anti-freeze heat-insulation structure based on phase change temperature adjusting concrete and a construction method. The tunnel anti-freeze heat-insulation structure comprises a primary tunnel lining, a waterproof plate, a secondary tunnel lining and a fireproof plate which are sequentially arranged on the tunnel cavern wall from outside to inside. Concrete of the secondary tunnel lining contains porous lightweight aggregate and phase change capsules. A heating device is sandwiched between the secondary tunnel lining and the waterproof plate. The porous lightweight aggregate and a phase change material are combined with an active heat supply technology, the problems that upper underground water of tunnel surrounding rocks melts while lower underground water of the tunnel surrounding rocks is frozen are solved, and the freezing damage to tunnels is completely eliminated; the energy storage and temperature adjusting functions of the phase change material and the heat insulation performance of the porous lightweight aggregate are utilized, and purchase cost and operation cost are reduced; and in addition, the porous lightweight aggregate and the phase change material are directly doped into concrete, the excavation radius of the tunnels does not need to be increased, and the construction cost is reduced.

The invention relates to a control method for under-cooling slush-freezing storage and a refrigerator. Through under-cooling, under-cooling removal and slush-freezing storage of a stored object, under-cooling and slush-freezing storage of the stored object are achieved, wherein in the under-cooling process, through control over cooling of a freezing chamber, the stored object stably enters an under-cooling state, then under-cooling of the stored object is removed in the under-cooling removal process, the stored object quickly gets through the maximum ice crystal zone, tiny and uniform ice crystals are generated in the stored object, and heating and cooling are conducted alternately with the stored object freezing point as reference temperature in the slush-freezing storage process. The stored object is in a slush-freezing state, and the phenomenon that the ice crystals are increased due to temperature fluctuation is reduced.

The invention discloses a preparation method of preserved instant rice noodles. The preparation method comprises the following steps: 1) soaking and rehydrating; (2) sealing: draining the soaked and rehydrated rice noodles, putting the drained rice noodles into a preservation bag, and sealing the preservation bag; (3) sterilizing: putting the bagged rice noodles obtained in step (1) into a sterilization kettle for high-temperature sterilization, and after the sterilization, transferring the bagged rice noodles into running water for cooling for 5-10 minutes; and (4) quick-freezing: draining the bagged rice noodles obtained in the previous step, putting the drained bagged rice noodles into a quick-freezer for quick-freezing for 35-40 minutes, taking out the bagged rice noodles from the quick-freezer after the bagged rice noodles are completely frozen, unfreezing the bagged rice noodles in a natural environment for 24 hours or longer or by microwaves, and performing packaging and delivering from a warehouse. The preparation method can immediately soak and disperse the preserved instant rice noodles at a temperature of 90 DEG C, so that an instant property of the preserved instant rice noodles is greatly improved.

The invention relates to a refrigerator food preservation control method, a refrigerator food preservation control device and a refrigerator. The method comprises the following steps that the temperature of a compartment of the refrigerator is controlled at a first preset temperature for a first preset time, wherein the compartment is used for storing food; the temperature of the compartment of the refrigerator is controlled at a second preset temperature for a second preset time; a high-voltage electrostatic device is started so as to enable the food in the compartment to be in a high-voltageelectrostatic field environment; the temperature of the compartment of the refrigerator is controlled at a third preset temperature for a third preset time, and the high-voltage electrostatic deviceis switched off; and the temperature of the compartment of the refrigerator is controlled to be maintained at a fourth preset temperature. The food enters a supercooled state through temperature control and slow cooling, and then the high-voltage electrostatic device is started, so that the supercooled food in the high-voltage electrostatic field environment is quickly released from the supercooled state to enter a frozen state, the frozen state of each part of the food is uniform, adverse phenomena such as freezer burn are avoided, nutrition and texture of the food are not damaged, and the food freezing effect is improved.

The invention discloses a refrigerator and an instant freezing and refrigerating control method thereof. The control method comprises the steps that when a refrigerator controller detects that the temperature of food placed in an instant freezing chamber is larger than a set temperature T, an instant freezing program is controlled to be started, the instant freezing program controls the temperature in the instant freezing chamber in a staged mode, and the food is made to reach the frozen state through a pre-cooling temperature reduction stage, a stepped temperature reduction stage and a supercooling relieving stage and then returns to a partial freezing stage for freezing storage. According to the control method, the intelligent operation problem of the instant freezing chamber of the refrigerator is well solved, and the nutrition of frozen meat is kept to the maximum extent.

The invention is suitable for the technical field of air conditioners, and provides an evaporator state detection method and device, air conditioning equipment and a storage medium. The refrigerant pressure of an evaporator outlet is detected; then the saturation temperature of an evaporator is obtained according to the refrigerant pressure; and finally, the freezing state of the evaporator is determined according to the saturation temperature, the accurate saturation temperature of the evaporator can be obtained according to the refrigerant pressure data, obtained through direct measurement, of the evaporator outlet, and therefore the freezing state of the evaporator can be accurately judged according to the saturation temperature. And the operation state of the air conditioning equipment is adaptively controlled according to the freezing state of the evaporator so as to protect the evaporator and a compressor and prevent the evaporator and the compressor from continuous low-pressure operation.

A method of controlling and enhancing the nucleation of product in a freeze dryer is provided, wherein the product is maintained at a predetermined temperature and pressure in a chamber of the freeze dryer, and a predetermined volume of condensed frost is created on an inner surface of a condenser chamber separated from the product chamber and connected thereto by a vapor port. The opening of the vapor port into the product chamber when the condenser chamber has a pressure that is greater than that of the product chamber creates gas turbulence that breaks down the condensed frost into ice crystals that rapidly enter the product chamber for even distribution therein to create uniform and rapid nucleation of the product in different areas of the product chamber.

The invention discloses an anti-freeze tap which comprises a warm house, a tap, a handle and a water outlet pipe; the warm house is a rectangular space which is dug on a wall body and is provided with a detachable warm house cover; the water outlet and the water inlet of the tap are respectively connected with the water outlet pipe and a tap water pipe fixedly; the water outlet pipe is in a horizontal Z shape, wherein a horizontal section is inlaid in the water body, penetrates out of the right side surface of the wall body for a distance and is bent downwards; the handle is in a reverse L shape and is fixedly connected with a valve rod through a tongue, a groove and a screw; the valve rod penetrates through a through hole which is matched with the valve rod; the front end of the valve rod is provided with a hexagonal groove and a screw; the horizontal part of the handle is the tongue which is matched with the groove; and after the tongue is inserted into the groove, the tap is fully turned off when the handle is at a vertical downward position and is fully turned on when the handle is rotated backwards to be horizontal. A heat insulating material is fully filled in the warm house, the warm house cover is covered, the tongue is inserted into the groove and the screw is tightened. The anti-freeze tap has the beneficial effects that the use is simple, convenient and practical, the effect is significant, and the promotion is easy.

A method of controlling and enhancing the nucleation of product in a freeze dryer is provided, wherein the product is maintained at a predetermined temperature and pressure in a chamber of the freezedryer, and a predetermined volume of condensed frost is created on an inner surface of a condenser chamber separated from the product chamber and connected thereto by a vapor port. The opening of thevapor port into the product chamber when the condenser chamber has a pressure that is greater than that of the product chamber creates gas turbulence that breaks down the condensed frost into ice crystals that rapidly enter the product chamber for even distribution therein to create uniform and rapid nucleation of the product in different areas of the product chamber.

The invention provides a freezer-free liquid nitrogen artificial ground freezing method and belongs to the technical field of artificial ground freezing. According to the method, construction drilling, namely primary drilling is carried out at first, and then freezing of a drilled hole and the ground surrounding the drilled hole is carried out by inserting a liquid nitrogen injection pipe into the drilled hole; after muddy water in the drilled hole formed through primary drilling and the surrounding ground are frozen, secondary drilling construction is carried out, a stable channel is formed, and liquid nitrogen is injected continuously to achieve ground freezing; and after the range, temperature and strength of frozen soil meet design requirements, liquid nitrogen injection is stopped, and freezing is completed. According to the method, the characteristics of low temperature and quick freezing of the liquid nitrogen are fully used, the ground is frozen in a forced mode, conditions are provided for secondary drilling dry operation, a natural liquid nitrogen heat exchange space is formed in the ground after secondary drilling, the liquid nitrogen makes direct contact with the soil, and higher heat exchange efficiency and higher freezing speed can be obtained. The links of machining, producing and installing traditional freezers are omitted, material is saved, cost is reduced, and the construction progress is improved.

A device for monitoring a liquid level of a liquid storage tank for a vehicle is capable of improving sensing sensitivity of a liquid level sensor by employing a structure capable of amplifying an electromotive force, which is generated by an electrode, at an electromotive force amplification layer including a carbon micro coil (CMC) and accurately sensing a frozen state of a liquid to perform a heating function so as to resolve the frozen state of the liquid.

The invention relates to a continuous-working defrosting device for a quick-freeze storage. The continuous-working defrosting device comprises a compressed-air defrosting component, a thermal-insulation storage body, an air injection tank component, an air injection tank component reversing transmission mechanism, a water defrosting system and an automatic water retaining device and is characterized in that the compressed-air defrosting component comprises an air storage tank, the lower end of the air storage tank is provided with an automatic water discharge valve, and the upper end of the air storage tank is provided with a pressure gauge, a safety valve and a pressure transmitter. The continuous-working defrosting device has the advantages that the device is especially suitable for a super-long evaporator, low-pressure compressed air is used for performing blow drying after defrosting, nozzles are close to the evaporator, fast blow drying is achieved, the large-flow rotary nozzles are mounted on the guide rail of the air injection tank component, structure compactness is achieved, air injection tank reversing uses a special double-proximity-switch control manner, work reliability and maintenance convenience are achieved, and the automatic-control water retaining device is used during evaporator water defrosting to prevent low-temperature discharge water from splashing aroundto cause mesh belt icing.

The invention discloses a heating control method of a liquid supply pump. The method comprises the following steps: judging the freezing state of the liquid in the liquid supply pump by using an internal temperature sensor of the liquid supply pump; According to the working environment state of the liquid supply pump; calculate the heating mode that the liquid supply pump needs to enter according to the freezing state of the liquid in the liquid supply pump and the working environment of the liquid supply pump; according to the heating mode of the liquid supply pump, use the power supply for the liquid supply pump The voltage calculation is suitable for the defrost control parameters of the liquid supply pump; the diagnosis is made according to the internal temperature rise characteristics of the liquid supply pump. According to the frozen state of the liquid in the liquid supply pump and its environment, the present invention can calculate appropriate control parameters to perform thawing or heat preservation control, so that the liquid supply pump can work stably and reliably in cold environments.

The present invention relates to a cold-chain delivery and retrieval system on the basis of a blockchain, comprising: a supplier terminal operated by a supplier who supplies items; a customer terminal used by a customer to order the items supplied by the supplier; a single server or a plurality of servers connected via a blockchain; an item storage device which stores the items prior to being received by the customer, and is provided with a plurality of unit storage boxes previously allocated to each of a plurality of suppliers, and a cooling unit configured to keep the unit storage boxes in a refrigerated or frozen state, wherein each of the plurality of unit storage boxes varies a loading space thereof according to the size of an item being stored therein; and a container return device to which a container used for packaging or storing the item is returned, wherein the container performs the function of managing the temperature of items.

The invention discloses a microwave vacuum freeze-drying device, and belongs to the technical field of microwave application. A drying bin communicates with a cold trap through a water vapor channel; the cold trap is connected with a vacuumizing device through a pipeline; the drying bin communicates with a front transition bin through a drying inlet, and communicates with a rear transition bin through a drying outlet; a first electric control door for controlling opening and closing of the drying inlet is arranged on the drying inlet; a second electric control door for controlling opening and closing of the drying outlet is arranged on the drying outlet; a material conveying device is arranged in the drying bin; a material inlet is formed in the front transition bin; a third door is arranged on the material inlet; a material outlet is formed in the rear transition bin; a fourth door is arranged on the material outlet; and the front transition bin and the rear transition bin are separately connected with the vacuumizing device through pipelines. The microwave vacuum freeze-drying device can sublimate moisture in a to-be-dried material in a frozen state to realize quick drying of the material, the material is uniformly dried, the component loss is less, the shape is well kept, and continuous batch treatment can be realized.

The invention provides an air conditioner anti-freezing method, an air conditioner and a computer readable storage medium. The method comprises the following steps that 1, the current working state ofthe air conditioner is acquired; 2, if the current working state is that when the running duration of the air conditioner entering the refrigerating mode exceeds the first preset time duration, a current preset interval is determined according to the absolute value of the difference value between the real-time preset temperature value and the real-time indoor environment temperature; 3, the inletpressure value of an evaporator is detected; and 4, the entering time and the exiting time of the anti-freezing mode is determined according to the inlet pressure value and the pressure threshold value corresponding to the current preset interval. The air conditioner comprises a controller, and the controller is used for executing the anti-freezing method of the air conditioner when the computerprogram stored in a memory is executed. The computer readable storage medium is stored with the computer program, and when the computer program is executed by the controller, the anti-freezing methodfor the air conditioner is realized. According to the method, the accuracy of controlling the air conditioner to enter the anti-freezing state can be improved.

The invention provides a refrigerator and a control method thereof. The refrigerator comprises a refrigerator body, a refrigerating system, a detection system and a control system. A storage chamber is defined by the refrigerator body; the refrigerating system is configured to provide cold energy for food stored in the storage chamber; the detection system is arranged in the storage chamber; and the control system is configured to control the detection system to apply thrust to the food and obtain the moving distance generated when the detection system applies the thrust so as to adjust operation parameters of the refrigerating system according to the moving distance. According to the refrigerator, thrust can be applied to the food by arranging the detection system, so that the control system determines the freezing state of the food based on the moving distance generated after the thrust is applied by the detection system, the freezing point of the food is accurately controlled, and nutrition loss and quality and taste reduction of the food in the thawing process are avoided.

The invention discloses a microwave vacuum freeze-drying device, which belongs to the field of microwave application technology. The drying chamber communicates with a cold trap through a water-air channel; the cold trap is connected with a vacuum device through a pipeline; The warehouse is connected to the post-transition warehouse through the drying outlet; the drying inlet is equipped with the first electric control door to control the opening and closing of the drying inlet; the drying outlet is equipped with the second electric control door to control the opening and closing of the drying outlet; Conveying device; the front transition chamber is equipped with a material inlet; the material inlet is equipped with a third door; the rear transition chamber is equipped with a material outlet; the material outlet is equipped with a fourth door; the front transition warehouse and the rear transition warehouse are respectively passed through the pipeline Connect the vacuum unit. The microwave vacuum freeze-drying device of the present invention can sublimate the moisture in the material to be dried in the frozen state to realize rapid drying of the material, the material is evenly dried, the loss of components is small, the shape is kept well, and continuous batch processing is possible.

The present invention relates to slip flow for reliable anode-to-cathode flow under freezing conditions. An apparatus and method for ensuring proper fuel cell system warm-up or shutdown during freeze conditions. A three-way valve is used in conjunction with the flow control orifice to ensure that the orifice avoids ice plugging during freezing conditions. Dry hot air is delivered under pressure as a slipstream to the cathode flow channel, where the orifice is configured such that it is structurally compliant so as to facilitate deflection in response to the pressurized slipstream, thereby helping to make possible Any small amount of ice that forms in the mouth or on the orifice breaks up.