191results about How to "Reduce air humidity" patented technology

The invention is suitable for the field of dish-washing machines, and discloses a drying and dehumidifying structure for a dish-washing machine and the dish-washing machine. The drying and dehumidifying structure for the dish-washing machine comprises an inner container with a washing inner cavity and a semiconductor condensing assembly which is arranged on the inner container, wherein the semiconductor condensing assembly comprises a semiconductor refrigerating sheet which is arranged on the inner container in an inserting way, a power supply which is arranged outside the inner container and is electrically connected with the semiconductor refrigerating sheet, and a condensing cover which is arranged in the inner container and is enclosed into a condensing cavity together with the inner container; communication holes for communicating the washing inner cavity with the condensing cavity are formed in the condensing cover in a penetrating way; the semiconductor refrigerating sheet is provided with a refrigerating part and a heating part; the refrigerating part is inserted into the inner container and is accommodated in the condensing cavity; the heating part is arranged outside the inner container. At the drying stage of the dish-washing machine, the refrigerating part in the condensing cavity can be used for condensing vapor into water drops to be collected into the condensing cavity, so that the air humidity in the washing inner cavity is lowered effectively, and vapor is prevented from being condensed into water drops on tableware, and the drying performance of the dish-washing machine is enhanced.

The invention relates to a switch cabinet for a wind turbine with at least one circuit element accommodated in said switch cabinet and a drying arrangement for preventing water depositions onto the at least one circuit element, wherein the drying arrangement includes a device for generating an air flow in a region of the at least one circuit element, the device including a peltier element.

The invention relates to a dripping arrow irrigation automatic control system, a manufacturing method of the dripping arrow irrigation automatic control system and a dripping arrow irrigation method. The dripping arrow irrigation automatic control system consists of a reservoir, a water pump, a water level sensor, a conveying main pipeline, a fertilization pipeline, a conveying branch pipeline, a temperature sensor, a main controller, a start controller, a water taking pressure gauge, an electromagnetic valve, a suction and exhaust valve, a fertilization control valve, a filter and a water conveying pressure gauge; the reservoir is arranged at the initial end of the conveying main pipeline; the water level sensor is arranged in the reservoir; the water level sensor is connected with the main controller; the water pump is arranged on the reservoir and is used for drawing a water source in the reservoir; the water taking pressure gauge, the electromagnetic valve, the suction and exhaust valve, the fertilization control valve, the filter and the water conveying pressure gauge are sequentially arranged on the initial section of the conveying main pipeline; the fertilization control valve is mounted on the initial section of the conveying main pipeline; a fertilizer is uniformly conveyed into the conveying main pipeline by the fertilization conveying pipeline. The dripping arrow irrigation automatic control system is scientifically designed, has a reasonable structure and uniform flow, is reasonable in system arrangement, is stable in pressure in the pipelines, has wide applicability and has a wide application range; a dripping arrow takes effects of a water dropper and an insertion arrow, has a small size and high intensity, has powerful use functionality and is convenient to mount and use.

The invention discloses a nutrient solution matrix-free seedling raising and cultivating system and a seedling raising method. The system comprises a nutrient solution seedling raising tank, a seedling grid plate, seeding paper and covering paper, wherein the nutrient solution seedling raising tank is filled with water or nutrient solution; the seedling raising grid plate is arranged on the nutrient solution seedling raising tank, and water through holes are formed on the side faces of the grid plate holes of the seedling raising grid plate; the seeding paper is laid on the seedling raising grid plate; and after seeding, the covering paper is covered on the seeding paper bearing seeds. The method comprises: sowing seeds on the seeding paper, covering the covering paper with high water absorbing performance and breathability and covering the perlite or vermiculite on the covering paper; and after the seeds germinate, the roots of the seedlings penetrate the seeding paper to grow downward to absorb water and nutrients from the nutrient solution below. When the system is used, a matrix which is adopted by the conventional industrial seeding raising technique is not used, the overall accurate control over the temperature, water, nutrient and oxygen required by plants for growth in the whole seedling raising process is realized, the industrialization of the seedling raising processis realized, and the uniformity, strong seedling rate and robust degree of the seedlings are improved.

The invention discloses a bougainvillea spectabilis breeding method and belongs to the technical field of nursery stock propagation. The bougainvillea spectabilis breeding method includes the steps of standardized planting and management of bougainvillea spectabilis female parents and high-altitude layering of bougainvillea spectabilis child branches. According to the bougainvillea spectabilis breeding method, high-altitude layering is performed on the bougainvillea spectabilis child branches through the standardized planting and management of the bougainvillea spectabilis female parents, planting can be achieved in the current year, seedlings can be sold in the current year, and the supply period of the seedlings is greatly shortened; meanwhile, the high-altitude layering technological parameters are optimized, the rooting percentage of the obtained high layered branches is high, the transplanting survival rate of the high layered seedlings is high, and the problems that the supply period of the bougainvillea spectabilis seedlings is long, the seedling breeding conditions are critical, and the seedling breeding cost is high are solved.

The application discloses a dehumidification device for a switch cabinet, which comprises a casing, a fan, a refrigerating component and a condensed water conduit, wherein an air inlet, an air outlet and a condensed water outlet are formed in the casing; the refrigerating component is arranged on an air duct located between the air inlet and the air outlet; one end of the condensed water conduit is connected with the condensed water outlet, and the other end is located outside the switch cabinet. According to the application, water vapor contained in the humid air is condensed to water through the refrigerating component, the condensed water is further discharged out of the switch cabinet through the condensed water conduit, so that the phenomenon of water circulation of evaporation and condensation in the prior art is prevented, water in the switch cabinet is removed completely, the air humidity in the switch cabinet is reduced, and the problem in the prior art is solved.

A micro-humidifier for operably-connecting to a breathing circuit contains a liquid feed, a liquid chamber operably-connected to the liquid feed, and a vapour generator operably-connected to the liquid chamber. The liquid chamber has a volume of from about 0.01 mL to about 30 mL. The micro-humidifier is operably-connected to and / or is designed to be operably-connected to a breathing circuit upstream of the patient. When the micro-humidifier is operably-connected to a breathing circuit, the vapour from the vapour generator enters into the breathing circuit. A respiratory humidification system contains the a breathing circuit and the micro-humidifier as described herein. The micro-humidifier is operably-connected to the breathing circuit upstream of the patient, and the vapour from the vapour generator enters into the breathing circuit.

The invention provides an indoor unit of an air conditioner and a dehumidifying method and a dehumidifying device thereof, relates to the technical field of air conditioners, and is used for solving the problem of weak dehumidifying capacity of the indoor unit of a traditional air conditioner under the working condition of part load. The dehumidifying method comprises the steps of: obtaining an evaporation temperature of an evaporator measured by a first temperature sensor and an indoor environmental temperature measured by a second temperature sensor; determining a first target evaporation temperature according to the indoor environmental environment and a first preset rule, wherein the first preset rule includes a corresponding relation between the indoor environmental temperature and a third target evaporation temperature, and the first target evaporation temperature is obtained according to the third target evaporation temperature and a first preset threshold; and adjusting the openness of at least one throttling device in an opening state if the evaporation temperature of the evaporator is higher than or equal to the first target evaporation temperature. The dehumidifying method can be applied to dehumidifying control of the indoor unit of the air conditioner.

The invention discloses a building tool transport device based on a fabricated building, and relates to the technical field of fabricated buildings. The building tool transport device based on the fabricated building comprises a bottom plate. Bottom wheel fixing frames are fixedly connected to both sides of the bottom of the bottom plate, and bottom wheel connecting blocks are fixedly connected tothe tops of the inner walls of the bottom wheel fixing frames. Bottom wheel transverse plates are fixedly connected to the ends, away from the bottom wheel connecting blocks, of bottom wheel telescopic columns, and bottom wheel buffer springs are arranged at the positions, located between the bottoms of the bottom wheel connecting blocks and the tops of the bottom wheel transverse plates, of thesurfaces of the bottom wheel telescopic columns. The building tool transport device based on the fabricated building solves the problem that bottom wheels of a traditional transport tool for the fabricated building often have no buffering effect during transportation, skew, falling and damage of the building tool due to the fact that the building tool encounters rough and uneven roads during transportation are effectively reduced, the probability of breakage of the building tool is greatly reduced, and the work efficiency of building workers is ensured.

The invention relates to a de-humidifying system of a wind turbine. In a wind turbine tower de-humidifying system the tower comprises a chamber in its interior. The chamber comprises an electrical arrangement that admits waste heat. A first tube connects the interior of the chamber to the exterior of the tower, to allow air from the exterior of the tower to flow into the chamber. A second tube connects the interior of the chamber to the exterior of the tower, to allow air from inside the chamber to flow to the exterior of the tower. A valve is arranged in the second tube to open a passage between the second tube and the interior of the tower, to allow air from the chamber to flow into the tower.

The present invention relates to a method for the determination of the stresses occurring in wood when drying or being dried. With the method in accordance with the invention, electrodes are used to generate an electric field in drying wood in order to measure the electric complex spectrum using the impedance spectroscopy method while at the same time employing sensors k to measure acoustic emissions from drying wood and using the results for calculating the parameters required for determining the stress state existing in the wood and for monitoring and / or controlling the drying process.

The invention discloses a 35kV switch cabinet dehumidifying device based on adsorption rotary-wheel dehumidification. The 35kV switch cabinet dehumidifying device comprises a dehumidifying device shell, wherein a display panel is arranged on the upper surface of the dehumidifying device shell, a gas inlet end is arranged at one end of the dehumidifying device shell, a gas outlet end is arranged at the other side of the dehumidifying device shell, the gas inlet end and the gas outlet end are respectively communicated with a 35kV switch cabinet by means of pipelines to form a circulating loop, an adsorption rotary wheel is arranged in the dehumidifying device shell, and divided into a moisture adsorbing region and a regenerating region, the moisture adsorbing region and the regenerating region are alternatively converted under the rotation of the adsorbing rotary wheel, one side of the moisture adsorbing region is positioned at the gas inlet end, a processing fan is arranged at the other side of the moisture adsorbing region, an air outlet end of the processing fan is communicated with the gas outlet end, a regenerating fan is arranged at one side of the regenerating region, and a heater is arranged at the other side of the regenerating region. According to the 35kV switch cabinet dehumidifying device, self circulation and dehumidification of air in a switch cabinet are realized, the humidity of air in the switch cabinet is reduced, explosion accidents are effectively prevented, and good application prospect is obtained.

The invention relates to an energy-saving and emission-reducing sow gestation hut in the north. The sow hut is encircled by a south wall, a north wall, a west side wall and an east side wall. An automatic roller shutter is placed at the junction of a sloping roof and a ridge of a sunshine glass plate ceiling; the sunshine glass plate ceiling is located on the sunshine glass plate ceiling, and the sloping ceiling is located on the north wall; the south wall is provided with a window, the west side wall is provided with a west side door, and the east side wall is provided with an east side door; the ground is provided with a pit, a slotted floor is covered on the pit, and a limit fence crosses over the slotted floor; and the pit is provided with a drainage sewer, and the drainage sewer is covered by a drainage cover. The invention utilizes the structure characteristics that the sunshine can transmit the glass, and the automatic roller shutter is placed at the junction of the ceiling and the ridge so that the hut can keep the temperature, and is ventilated and is dry; and the ground is provided with the pit and the slotted floor is covered on the pitch, thereby the problems of large discharge capacity, bad environment and moisture of the hut and odor caused by accumulated excrement are solved.

The invention discloses a breeding method for improving yield and seed production purity of hot pickled mustard tubers. According to the method, big-plant reserved seeds, medium-plant reserved seeds and small-plant reserved seeds of the hot pickled mustard tubers are respectively seeded in different periods; planting of plants, fertilization, seed selection, pruning and harvesting are performed on big, medium and small hot pickled mustard tuber plants by adopting different treatment means; and the seeds of the hot pickled mustard tubers are produced by adopting a repeated reproduction technical route of reproducing big-plant reserved seeds with the big-plant reserved seeds, reproducing medium-plant reserved seeds with the medium-plant reserved seeds and reproducing production seeds with the small-plant reserved seeds. The method has the advantages of greatly improving the yield and the purity of the hot pickled mustard tuber seeds and reducing the cost and the risk of seed production.

The invention discloses a Kyoho grape labor-saving cultivation method achieving production and sightseeing and picking. The method comprises various measures such as garden plot selection, canopy frame building, medium cultivation, ridging, field planting, water management, psi-shaped pruning, denuclearization treatment, soil management, anti-bird mesh covering, leaf picking, bagging and disease and pest control. According to the Kyoho grape labor-saving cultivation method achieving production and sightseeing and picking, a psi-shaped pruning mode is adopted to shape grapes, the method conforms to growth habits of the Kyoho grapes, a tree body reaches a balance of reproductive growth and vegetative growth, the flower bud differentiation rate, the fruit setting rate, the fruit sugar degree and the fruit yield are obviously increased, and the quality is obvious improved; mechanical picking can be conducted, the method is suitable for sightseeing and picking, and the method can be popularized in a large area in industrial production of the grapes.

The invention relates to a DCS control system for producing anhydrous crystalline fructose by using sugarcanes as raw materials. According to the system, a pH control unit is set in a hydrolysis neutralization process of sugarcane juice concentration; a conductivity control unit is set in a continuous ion exchange stage of high fructose corn syrup; a flow rate, concentration and temperature control unit is set in a concentrating process after fructose and glucose ion exchange separation; a flow rate, liquid level, concentration and temperature control unit is set in a fructose concentrating, crystallization and drying processes; and a flow rate, liquid level, concentration and temperature control unit is arranged in a glucose recovery process. According to the control units, sensors are arranged in equipment; control valves are arranged at feeding openings and discharging openings; and the sensors are connected with an industrial Ethernet switch through lines and are further connected with a control room workstation and a central control room DCS workstation respectively, and are connected with a remote control center through the Internet. With the DCS control system of the invention adopted, and equipment devices and process parameters in each process are controlled comprehensively and automatically and are reasonably matched, and equipment input and production cost are greatly reduced, and the primary yield of industrially-produced crystalline fructose products can be up to 50%.

A method for preparing medicinal waterless crystallized fructose by taking sugarcane as raw material is disclosed. The technological process of the method comprises the following steps: performing cane juice squeezing concentration, preparing high fructose corn syrup, refining high fructose corn syrup, separating refined high fructose corn syrup, crystallizing fructose and recovering a glucose solution. In the method, the equipment and technological parameters of all procedures are comprehensively optimizes and reasonable matched, the method is suitable for industrialized production demand, equipment investment and production cost are substantially reduced, the once yield of the industrialized produced crystallized fructose product is up to 50%, the technology content of fructose production is improved, and the situation that fructose market severely depends on imported high-quality medicinal fructose and technology equipment thereof is solved.

The invention discloses an anti-condensation ring main unit, and belongs to the technical field of ventilation of a ring main unit; the anti-condensation ring main unit comprises an intelligent isolating and moisture-proof processing cavity; the intelligent isolating and moisture-proof processing cavity is installed at the bottom part of the ring main unit and located above a cable ditch; the cable ditch is paved with a cable, and the cable enters the ring main unit after crossing through the intelligent isolating and moisture-proof processing cavity; one side of the intelligent isolating and moisture-proof processing cavity is provided with an air inlet, and the other side is provided with a pressure relief window; the air inlet is connected with an environment adjusting device, and the pressure relief window is equipped with a pressure relief valve; the environment adjusting device is installed at the inner part of the ring main unit, and comprises a temperature humidity processing device and an air delivery device. Through arranging the intelligent isolating and moisture-proof processing cavity, the device can prevent vapor evaporated by the cable ditch from entering the cabinet body, and thereby fundamentally reducing wet gas at the inner part of the cabinet body, decreasing the work load of the environment adjusting device, effectively reducing air humidity in the ring main unit and stopping condensation.

The invention provides a soilless culture method for greenhouse vegetable in the gobi desert, which belongs to the field of soilless organic matter cultivation of crops. According to the method, a greenhouse is built on the land of the gobi desert; trenches are dug and filled with soilless organic matters; water-saving irrigation is carried out; water and fertilizer management measures like seedling management are taken; and perennial cultivation of vegetable and floral crops is carried out without replacement of soil. The method has the characteristics of saving of labor, water and fertilizer, high efficiency, economic performance and cyclic utilization.

The invention provides an automatic dehumidification power transformation box, which comprises a top plate, a dehumidification cylinder, a control cylinder and a box body. The top plate is welded to the top of the box body. The dehumidification cylinder and the control cylinder are welded to the right side of the box body in an embedded mode. The dehumidification cylinder is located right over thecontrol cylinder. Two cabinet doors are hinged to the front surface of the box body through hinges. According to the invention, when the air humidity in the box body is increased, the heat of the aqueous vapor can be quickly absorbed by metal water collecting barrels when the aqueous vapor gets in contact with the metal water collecting barrel. Therefore, the aqueous vapor in the metal water collecting barrels can be quickly liquefied on the inner wall of the metal water collecting barrels to form water drops. After the water drops are accumulated to a certain extent, the water drops flow down along the inner wall of the metal water collecting barrel and flow towards water running plates. When water on the water running plates comes up together, the two water running plates can form a current loop. In this way, a power supply for a motor and an electric heating pipe is switched on by an electric wire. The electric heating pipe starts heating to dry the air. The motor drives fan bladesto rotate to form the airflow and the airflow is driven to blow into the box body. The air humidity in the box body is reduced, and the automatic dehumidification is achieved.

The invention relates to a soil preparation method for improving the production performance of soil in a sandy soil matrix greenhouse. According to the method, field soil is partially added in a pure sandy soil farming layer, the three-dimensional structure that sand is covered with soil, soil is coated with fertilizer and ridges are high is formed, and the pure sandy soil productivity is greatly improved. Based on the soil dressing principle, the good rooting performance, moisture and fertilizer retention performance, buffer performance, biological performance and nutrient performance of the field soil are kept, the pure sand layer is utilized for cutting off surface layer soil capillary force, the humidity in the greenhouse is lowered, and therefore diseases caused by high humidity in the greenhouse are greatly reduced. The soil temperature of the farming layer in winter is increased due to the fact that the ridges are high, and therefore the growth of vegetable root systems is promoted. Accordingly, the soil production performance and the vegetable output are greatly improved.

The invention discloses a condensation preventing device for solid insulated switchgear. The switchgear comprises a cable chamber and a horizontal busbar chamber, wherein each of the cable chamber and the horizontal busbar chamber is provided with a vertical sealing plate and a door; the surface of each of the sealing plates is provided with a plastic spraying layer, and the surface of each of the doors is provided with a plastic spraying layer; the plastic spraying layer on the inner side of the inner side surface of each of the sealing plates and the doors is coated with a resin type MYQS-1 hydrophilic material coating. The invention also discloses a manufacturing method of the condensation preventing device. Due to the adoption of the technical scheme, the condensation resistance level of the self surface of the solid insulated switchgear is improved; on the one hand, condensate is initiatively generated on the inner side of a shell consisting of the functional chambers and forms water drops which then flow into a guide channel and is discharged out of the switchgear, and thus the air humidity in the switchgear is reduced, and a live part cannot reach the saturation humidity under which the condensate generates; on the other hand, a micron-nanoscale coarse structure and a hydrophobic material surface with low surface energy are established on the surface of the solid insulated switchgear, so that the concentrate is not easy to generate on the surface of the solid insulated switchgear; therefore, the purpose of ensuring the safety operation of electrical equipment is achieved.

The invention discloses a method for preventing and treating panax notoginseng round spot. The method comprises the following steps of: constructing an arched tunnel of which the arch height is 1.2cm and the arch width is more than soil moisture width and less than the sum of the moistened soil width and the width of drainage ditch between the moistened soils on each moistened soil surface where panax notoginseng is planted in a panax notoginsen shade-shed, wherein the arched tunnel is constructed by reinforcing steel bars or bamboos; covering a plastic film on the outer surface of the arched tunnel in a rainy day and ensuring that the edge of the plastic film is sagged to the bottom surface of the drainage ditch between the moistened soils; and uncovering the film when the rain stops. With the adoption of the method, the newly-increased disease strain rate of the round spot is reduced by over 90 percent, that is, the loss is recovered by 90 percent, and the grade of the disease strain only reaches a grade 1; and meanwhile, the newly-increased disease strain rate of epidemic disease is reduced by over 95 percent. In addition, because newly-increased disease strains are unavailable to melasma, gray mold and powdery mildew, the dosage quantity of sterilizing agents and artificial insecticide spraying expense are reduced, the planting cost is saved, the yield of panax notoginseng is increased, the quality of panax notoginseng is improved and the income is increased; and moreover, the arched tunnel uses simple materials and is easy and convenient to operate.

The invention discloses a method for controlling chocolate spot by diversity planting of broad beans and potatoes under zero tillage of rice stubble. The method comprises the following steps of: (1) dividing a vacant rice field into lines, wherein a line spacing is 60cm; (2) sowing a new species of moderate chocolate spot resistance broad beans, named as 'Tongchanxian No.8', in the vacant rice field in a mode of emptying two lines and sowing two lines; (3) sowing detoxification potato seeds of 'Chongqing potato No.1' in the empty lines from the 12nd-18th in December each year after the broad beans are sown, and covering the seeds by straws after sowing; and (4) harvesting. The broad beans and the potatoes are interplanted to lower the density of broad bean plants with the weak chocolate spot resistance in each unit area, thereby slowing down the transmitting and spreading process of chocolate spot; 'air chutes' are formed between the broad beans and the potatoes to effectively lower the air humidity in the field and shorten the retention time of dews on the broad bean plants and leaves to lighten the morbidity degree; and the potatoes serve as barriers to prevent chocolate spot germs from spreading so as to lighten the disease, and the prevention and control effect on the chocolate spot is remarkable.

The invention discloses a control method and device of air conditioner condensation prevention, and belongs to the technical field of air conditioners. The control method comprises the following stepsthat a first indoor humidity value of the space where an air conditioner is located is acquired, and a first indoor moisture content is determined; a first outdoor humidity value of the space where the air conditioner is located is acquired, and a first outdoor moisture content is determined; and when the first indoor humidity value is greater than a preset condensation humidity threshold value and the first indoor moisture content is greater than the first outdoor moisture content, and the air conditioner is controlled to operate a fresh air mode. The air with low humidity in the outdoor environment can be introduced into the indoor environment by switching to the fresh air mode to reduce indoor air humidity and moisture content, the amount of moisture condensation when indoor air is transported by the air conditioner in a circulation mode is reduced, and the using experience of users is ensured.

The invention discloses a power cabinet dehumidifying device comprising humidity detection units, a power circulation unit, a drying unit, a circulation pipeline and control switches. The power circulation unit is a closed circulation system, the outlet of the power circulation unit is connected with a main circulation pipeline and then connected with power cabinets through branch pipelines, the outlets of the power cabinets are connected with the main circulation pipeline through branch pipelines and then communicated with the drying unit, the drying unit is connected to the inlet of the power circulation unit, and the control switches are respectively arranged on the branch pipelines at the inlets of the power cabinets. The humidity detection units are installed in the power cabinets, are linked with a starting switch of the power circulation unit, and are linked with the control switches of the branch pipelines. By utilizing the power cabinet dehumidifying device, multiple power cabinets can be connected simultaneously, and the air humidity in the power cabinets can be effectively reduced without increasing the temperature in the power cabinets. Moreover, the power cabinet dehumidifying device has the advantages of low power, energy conservation and environmental protection.

The invention provides an air conditioner which comprises an indoor side and an outdoor side, wherein a first heat exchanger and a first shell covering the first heat exchanger are arranged on the indoor side; a fresh air vent is formed in the first shell; a dehumidifying device is arranged on the outdoor side and positioned at the fresh air vent; and outdoor fresh air passes through the dehumidifying device, and then enters the indoor side through the fresh air vent. The air conditioner provided by the invention has the advantages that the outdoor fresh air is dehumidified and subjected to other operations through the dehumidifying device arranged at the fresh air vent, and the fresh air entering the indoor side from the fresh air vent is relatively low in humidity, so that the air humidity of the indoor side can be reduced and the indoor comfort can be improved; and meanwhile, a filter screen assembly is arranged on the dehumidifying device, so that the cleanliness of the fresh air entering the indoor side can be guaranteed, and then the air quality of the indoor side can be guaranteed.

The invention belongs to the technical field of adjusting systems, and particularly relates to a liquid nitrogen inner-spraying type digital control milling and drilling machine gas adjusting system.The liquid nitrogen inner-spraying type digital control milling and drilling machine gas adjusting system includes a humidity tester in a drilling and milling machine cabin, a nitrogen concentration monitor in the drilling and milling machine cabin, a dryer in the drilling and milling cabin, a controller, an exhaust fan, a direct discharging control valve, a flow speed control valve and a dust removing mechanism. According to structural key points of the liquid nitrogen inner-spraying type digital control milling and drilling machine gas adjusting system, an alarm signal output port of the humidity tester is connected with an alarm signal input port of a humidity alarm, and an alarm signal output port of the nitrogen concentration monitor is connected with an alarm signal input port of a nitrogen concentration alarm.