1437results about "Lubricant composition" patented technology

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention provides a grinding fluid, the grinding fluid comprises a base fluid, a grinding material, nano-diamond and a dispersion stabilizer, the base fluid comprises polyether and silicone oil, the grinding material comprises surface modified silicon carbide particles, and the dispersion stabilizer comprises polyethylene glycol stearate and polyvinylpyrrolidone. The surface roughness of a grinding piece can be reduced, the scratch density and microcracks of the surface are reduced, damage of grinding fluid to the grinding piece is reduced or even avoided, and the service life of a cutter can be prolonged. The invention also provides a preparation method of the grinding fluid and a process method using the grinding fluid.

The invention discloses an immersed heat dissipation composite phase change cooling liquid, which is prepared from the following components in parts by weight: 97.0 to 99.7 parts of basic liquid, 0.1 to 1.5 parts of antioxidant and heat stabilizer, 0.1 to 0.8 part of corrosion inhibitor and 0.1 to 0.5 part of state monitoring tracer agent, the invention has the advantages of high-efficiency phase change heat dissipation capability, excellent electrical insulating property, long-term chemical stability, corrosion resistance and leakage monitoring property.

The invention relates to the technical field of lubricating oil, and discloses a low-temperature-resistant lubricating oil composition and a preparation method thereof. Mineral oil, modified polymethacrylate, a dispersing agent, an antioxidant and an oil defoaming agent are stirred and mixed and then filtered, and the low-temperature-resistant lubricating oil composition is obtained. The cross-linking agent enables polymethacrylate to form a light cross-linked structure, and stress can be dispersed during shearing; nitrogen atoms in triazinyl, pyridyl, pyrrolidone and Mannich base structures serve as hydrogen bond receptors, the hydrogen bond interaction with hydroxyl on a polymethacrylate molecular chain is enhanced, a physical cross-linked network is formed, and the shear resistance is further improved; in the modified low-temperature-resistant monomer, the glass-transition temperature can be remarkably reduced by high flexibility of silicon oxygen bonds in long straight-chain alkyl and silane groups, so that a molecular chain can still move at a low temperature, and the low-temperature fluidity of the lubricating oil is improved; the cyclic structure of cyclohexyl can effectively interfere with the ordered arrangement of wax crystals, reduce the pour point of the lubricating oil and improve the low-temperature fluidity.

The invention discloses conductive lubricating grease and a preparation method thereof, and belongs to the technical field of lubricating grease materials, the conductive lubricating grease comprises the following components by mass: 50-80 parts of base oil, 5-15 parts of a thickening agent, 3-10 parts of an additive, 5-20 parts of an oil soluble ionic liquid, and 1-10 parts of nanoscale conductive solid particles; the oil-soluble ionic liquid is prepared from trioctylamine, bromohexadecane and sodium di-tert-butyl phosphate. According to the conductive lubricating grease provided by the invention, the oil-soluble ionic liquid and the nanoscale conductive solid particles synergistically conduct electricity, so that the conductive lubricating grease has a tunnel conductive effect and excellent conductivity; besides, due to synergistic conduction of the oil-soluble ionic liquid and the nanoscale conductive solid particles, the addition amount of the conductive solid particles can be reduced, the anti-attrition effect of the conductive lubricating grease is further improved, meanwhile, the nanoscale conductive solid particles have a good anti-attrition effect, the solid size and the oil film thickness are both in nanoscale sizes, and the conductive lubricating grease has a good anti-attrition effect. Therefore, the conductive lubricating grease is excellent in overall anti-wear effect.

The invention discloses a lubricating grease composition I and a lubricating grease composition II, wherein the lubricating grease composition I is used as a raw material of the lubricating grease composition II. The lubricating grease composition I comprises 60-90 parts of base oil, 5-20 parts of a fatty acid composition, 2-5 parts of lithium hydroxide, 2-6 parts of modified nano boron nitride and 5-15 parts of an additive; wherein the viscosity of the base oil at 40 DEG C is 30-60 mm < 2 > / s, and the base oil is prepared by compounding and mixing 60%-90% w / w of poly-alpha-olefin synthetic oil (PAO) and the balance of synthetic ester (POE) belonging to V-type synthetic oil; the fatty acid composition is prepared from 12-hydroxystearic acid and unsubstituted C14-C20 saturated long-chain fatty acid, wherein the mass of the 12-hydroxystearic acid is 1 to 10 times that of the unsubstituted C14-C20 saturated long-chain fatty acid; the modified nano boron nitride is oleamide modified nano boron nitride; the additive is selected from at least one of an antioxidant, an anti-rust agent and an extrusion anti-wear agent. The invention also discloses application of the lubricating grease composition II as lubricating oil in lubrication of axle box bearings of high-speed railway trains with the speed of not less than 400km / h.

The invention belongs to the technical field of hydraulic oil preparation, and particularly relates to anti-wear hydraulic oil and a production process thereof. The anti-wear hydraulic oil is prepared from the following raw materials in percentage by mass: 2 to 2.2 percent of an anti-wear complexing agent, 0.002 to 0.003 percent of a demulsifying agent, 0.001 to 0.0015 percent of an anti-foaming agent, 0.03 to 0.04 percent of an anti-rust agent, 0.1 to 0.3 percent of a pour point depressant, 0.3 to 0.5 percent of a dispersing agent and the balance of base oil. According to the anti-wear hydraulic oil disclosed by the invention, a mixture of 500N II type base oil, 100N III type base oil, CTL 4 base oil and trimethylolpropane trioleate is used as base oil, and an anti-wear complexing agent, a demulsifier, an anti-foaming agent, an anti-rust agent, a pour point depressant and a dispersing agent are added into the base oil; the prepared anti-wear hydraulic oil is ensured to have excellent extreme pressure property, thermal oxidation stability and wear resistance.

The application provides an acid ester composite diesel anti-wear agent and a preparation method thereof, and belongs to the technical field of diesel additives, and comprises the following steps: S1, preparing a silanized solid acid catalyst; S2, preparing C18 polyol ester; S3, mixing an acid type anti-wear component and the C18 polyol ester, and then stirring after heating, and then adding tetrahydropyrazole pyridine derivatives and a diluent to continue stirring, and then cooling and filtering to obtain the acid ester composite diesel anti-wear agent. The application can improve the lubricity and anti-wear performance of low-sulfur diesel at a lower additive dosage, and has low corrosion and good oxidation stability.

The invention relates to the technical field of lubricant production equipment, in particular to a multifunctional lubricant blending kettle which comprises a kettle body, a driving mechanism fixedly arranged on the upper portion of the kettle body and a stirring device arranged in and hung in the kettle body. Wherein the outer side of the kettle body is sleeved with a jacket, one side of the upper part of the jacket is fixedly provided with a first cooling water interface, the bottom of the jacket is fixedly provided with a second cooling water interface, and a plurality of suspension lugs are fixedly arranged on the outer side wall of the jacket in a circumferential array manner; a heat exchange tube is fixedly arranged in the kettle body, the inlet end of the heat exchange tube penetrates through the bottom of the kettle body and the bottom of the jacket, and the outlet end of the heat exchange tube penetrates through the upper part of the kettle body; the upper part of the kettle body is fixedly provided with a feeding hole, a process interface, a balance breathing hole in a tank and a plurality of hoisting hanging lugs, and the bottom of the kettle body is fixedly provided with a discharging interface; the method is suitable for efficient production of multi-formula and high-performance lubricants.

The invention provides an alcohol ether polymer, a preparation method thereof and a cutting fluid containing the alcohol ether polymer. The alcohol ether polymer comprises a polymer as shown in a general formula I, a is 3-5, and b is 0-2. When the alcohol ether polymer provided by the invention is added into the crystalline silicon cutting fluid, in the silicon wafer preparation process, the wire breakage rate is low, the smudginess rate is low, the TTV of the silicon wafer is small, and the yield is high.

The invention belongs to the field of regeneration treatment of waste mineral oil, and particularly relates to a hydrogenation catalysis treatment process for a waste mineral oil suspension bed. The method aims at the problem of deep removal of impurities such as organic chlorine and organic silicon in waste mineral oil. A novel multifunctional composite adsorbent is prepared, a modified aluminum oxide-titanium oxide composite carrier is used as a basis, a main active metal tungsten and an auxiliary agent metal copper are loaded, and the main active metal tungsten and the auxiliary agent metal copper are converted into corresponding sulfides through vulcanization treatment; through multi-stage countercurrent contact, impurities such as chlorine and silicon in the waste oil are deeply removed, the process can efficiently remove organic chlorine and silicon impurities in the waste mineral oil, the service life of a hydrogenation catalyst is remarkably prolonged, the product quality is improved, and downstream equipment is prevented from being corroded.

The present invention relates to the technical field of waste lubricating oil treatment, and discloses a non-distillation regeneration apparatus and system, the non-distillation regeneration apparatus comprises: a high pollution lubricating oil pretreatment unit for removing water and other large particle impurities in waste oil; the electro-adsorption unit is used for capturing pollutants such as polar oxides and colloids in oil by adopting a porous conductive framework under the action of a direct-current electric field; the molecular filtering unit is used for carrying out cross-flow filtering by utilizing a ceramic membrane assembly and removing macromolecular non-ideal components; the deep purification unit is filled with a composite adsorbent to further purify the base oil, and the final product quality is ensured. By means of the innovative electro-adsorption refining filter and the multi-stage collaborative purification process, efficient regeneration of the waste lubricating oil under the non-distillation condition is achieved, high-quality base oil can be stably produced, and the method has the remarkable advantages of being energy-saving, environmentally friendly and high in automation degree.

The invention discloses composite ester-based hydraulic oil and a preparation method thereof, and belongs to the technical field of hydraulic oil preparation. The hydraulic oil based on the complex ester comprises the following components: pentaerythritol synthetic ester, polysebacic acid glycol ester, a viscosity-temperature performance regulator, an ash-free antioxidant, a bio-based anti-wear agent and a nano modifier. Wherein the pentaerythritol synthetic ester is a mixed ester obtained by carrying out a reaction on a mixture of 2-ethylhexanoic acid, 3, 5-dimethylhexanoic acid and 4-methyloctanoic acid and pentaerythritol, and the pentaerythritol synthetic ester is a mixture of 2-ethylhexanoic acid, 3, 5-dimethylhexanoic acid and 4-methyloctanoic acid; the viscosity-temperature performance regulator is a grafted copolymer obtained by grafting poly (N-isopropylacrylamide) to a poly (ethylene sebacate) molecular chain through an ester exchange reaction. The product prepared by the method disclosed by the invention can effectively solve the contradiction between the environmental protection performance and the comprehensive performance of the traditional hydraulic oil through the synergistic effect of the components, has the characteristics of high biodegradation rate and good oxidation resistance and hydrolytic stability, and can keep excellent performance in both low-temperature and high-temperature environments.

The invention discloses driving oil for new energy hybrid power automobile power and a preparation method thereof, and particularly relates to the technical field of driving oil, the driving oil comprises 70-85% of base oil, 0.8-2.5% of a conductive inhibitor, 1-3% of a nanometer heat conduction agent, 4-8% of a viscosity index improver, 0.1-0.5% of an ion trapping agent, 3-5% of an anti-wear reagent at extreme pressure, 0.5-1.5% of an antioxidant and 0.001-0.01% of an anti-foaming agent. The preparation method comprises the following steps: S1, base oil pretreatment, S2, nano heat conduction agent in-situ modification, and S3, gradient temperature control compounding. Through compounding of the base oil in a specific proportion and the synergistic effect of multiple additives, the problems of insufficient insulativity, easy oxidation, poor viscosity stability, low heat conduction efficiency, poor material compatibility and the like of traditional oil in a hybrid power system are solved, effective protection of a motor and an electric control system is realized, the heat management efficiency is improved, and the service life of the hybrid power system is prolonged. And the service life of oil is prolonged, the maintenance cost is reduced, and the special requirements of power and driving systems of hybrid vehicles are met.

The invention relates to a diamond wire cutting fluid for silicon wafer cutting and a preparation method and application thereof, and the diamond wire cutting fluid comprises the following components by weight: 10-45 parts of a composite additive; 2-6 parts of a functional agent; 10 to 30 parts of a solvent; 0.1-1 part of an auxiliary agent; and 30-50 parts of ultrapure water. The composite additive is used, fatty alcohol-polyoxyethylene ether sulfate has excellent wettability and permeability, after fatty alcohol-polyoxyethylene ether sulfate and N-acyl substituted iminodiacetate are used together, closer interface arrangement can be formed, the dynamic surface tension is reduced more quickly, the wetting process is accelerated, and the wetting and infiltration capacities are improved; the stability of the cutting fluid is kept.

The invention relates to the technical field of energy storage safety, and particularly discloses wide-temperature-range flame-retardant cooling liquid, a preparation method of the wide-temperature-range flame-retardant cooling liquid, an immersed energy storage device, a data center and electric equipment.The wide-temperature-range flame-retardant cooling liquid is introduced into the flame-retardant cooling liquid, the modifier can improve the wide-temperature-range performance of the flame-retardant cooling liquid, and the flame-retardant performance of the flame-retardant cooling liquid is improved; good applicability in extremely cold and high-temperature environments is ensured; the modifier has good breakdown resistance and thermal oxidation stability, so that the insulating property and oxidation resistance of the flame-retardant cooling liquid can be further improved; in addition, the modifier contains phosphorus element which can play a synergistic flame-retardant role with flame-retardant elements in the flame retardant, so that the flame-retardant property of the flame-retardant cooling liquid is further enhanced; meanwhile, the modifier also has good compatibility with other components in the flame-retardant cooling liquid, so that the cooling liquid can be uniformly dispersed, and the problem that the insulating property, the flame-retardant property and the wide temperature range property become poor due to system layering caused by poor compatibility is avoided.

The invention discloses a preparation method of an organic-inorganic composite microcapsule as well as an obtained product and application of the organic-inorganic composite microcapsule. The preparation method comprises the following steps: firstly, preparing a MoS2-metal composite material by adopting pulse laser irradiation, mixing the MoS2-metal composite material, PAO5 oil, polysulfone and an organic solvent to obtain an organic phase, and dissolving lauryl sodium sulfate and polyvinyl alcohol in water to obtain a water phase; and mixing the organic phase and the water phase, and obtaining the microcapsule by adopting a solvent evaporation method. The method disclosed by the invention is simple to operate and low in cost, and the obtained microcapsule can automatically store a lubricant and has excellent tribological performance in the friction process.

The invention belongs to the technical field of modified preparation of porous oil-containing materials, and provides a hierarchical porous oil-containing composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a polymer and a corresponding polymer covalent organic framework material, and sequentially carrying out cold pressing and hot sintering to obtain the hierarchical porous polymer composite material. And placing the hierarchical porous composite material in lubricating oil, and carrying out vacuum impregnation to obtain the hierarchical porous oil-containing composite material. The hierarchical porous oil-containing composite material prepared by the preparation method provided by the invention realizes self-adaptive oil supply within a wide rotating speed range and under different centrifugal forces, can meet the characteristics of maintenance-free property, high precision, high reliability, maintenance-free property and environmental friendliness of the material, and meets the upgrading of high-end equipment towards long service life and intelligence; and meanwhile, the balance of enhanced adsorption and high oil content (20%)-high oil retention rate (gt; 90%) of the lubricating oil is realized.

The application discloses a long-acting thixotropic rust-proof oil composition which is composed of the following components in mass fraction: base oil 70-95 parts, rust-proof agent 5-15 parts, auxiliary rust-proof agent 1-5 parts, antioxidant 0.1-1 part, thixotropic agent 1-20 parts and film forming agent 1-5 parts. The application also discloses a preparation method thereof, wherein after the components are weighed, the base oil is heated and stirred, and then added into the film forming agent to obtain mixture A; the mixture A is added into the thixotropic agent, the rust-proof agent, the auxiliary rust-proof agent and the antioxidant in sequence, and then constant-temperature stirring is conducted to obtain mixture B; after the mixture B is filtered, the filtrate is the composition of the application. The long-acting thixotropic rust-proof oil composition has a high thixotropic index, is not prone to flowing, and can keep a stable oil film thickness on the surface of a workpiece; under the conditions of damp heat and salt spray, the long-acting thixotropic rust-proof oil composition can exhibit more excellent rust-proof performance, and is suitable for harsh storage or transportation conditions such as sea transportation.

The invention discloses an anti-freezing solution suitable for a hydraulic support and a preparation method of the anti-freezing solution, and belongs to the field of mining mechanical engineering and industrial fluid. The water-based cutting fluid comprises the following raw materials in parts by weight: 25-45 parts of an anti-freezing agent, 1-3 parts of an anti-rust agent, 5-10 parts of a nano-composite lubricant, 2-5 parts of an anticorrosive agent, 1-3 parts of a stable buffer agent, 0.1-0.5 part of an acid-base regulator, 0.5-2 parts of a surfactant, 0.02-0.1 part of an anti-foaming agent and 30-65 parts of softened water. Wherein the nano composite lubricant is composed of molybdenum disulfide nanosheets, boron nitride nanosheets and carboxymethyl chitosan, and the mixing mass ratio of molybdenum disulfide to boron nitride to carboxymethyl chitosan is 1: 1: (3-10). The preparation method comprises the step of uniformly mixing the raw materials at 40-50 DEG C to obtain the anti-freezing solution finished product suitable for the hydraulic support. The anti-freezing solution integrating excellent anti-freezing, lubricating, rust-proof and environment-friendly properties is obtained, and the preparation method is simple and suitable for large-scale production.

The application belongs to the technical field of lubricating oil, and specifically provides a gas engine lubricating oil and a preparation method thereof.The gas engine lubricating oil comprises the following raw materials: ester base oil, anti-wear agent, dispersant, pour point depressant and antifoaming agent, wherein the ester base oil is prepared by esterification reaction of polyhydric alcohol and fatty acid; the preparation method of the anti-wear agent comprises the following steps: first, reacting acrylic acid with vinyl imidazole to prepare a modifier; then, polymeric phenol is obtained by polymerization of phenol under the action of a catalyst; finally, the polymeric phenol, boric acid and vegetable oil are reacted, the modifier is added after a certain time of reaction, and the reaction is continued to obtain the anti-wear agent.The preparation method of the gas engine lubricating oil of the application is that the raw material components are uniformly mixed according to the formula, and the gas engine lubricating oil of the application has good wear resistance, oxidation resistance, high-temperature detergency and thermal stability.

The invention relates to a lubricant composition comprising water and: - 0.05% to 40% by weight of polyalkylene glycol,- 0.001% to 15% by weight of non-ionic surfactant(s), 0.001% to 30% by weight of at least one cellulose compound, relative to the total weight of the lubricating composition. The invention also relates to the use of the lubricant composition according to the invention for metalworking.

The present application relates to the field of lubricating oil, disclose a kind of hydraulic oil composition and its preparation method and application.The hydraulic oil composition includes borate ester, polyethylene glycol methyl ether, polyethylene glycol butyl ether, polyethylene glycol and polyethylene oxide polypropylene oxide monobutyl ether and optional adjuvant;Wherein, the weight ratio of borate ester, polyethylene glycol methyl ether, polyethylene glycol butyl ether, polyethylene glycol and polyethylene oxide polypropylene oxide monobutyl ether is 10-20:1-6:1-5:0.5-4:1.The hydraulic oil prepared by the composition of the present application has good high and low temperature performance, and also has excellent antioxidant corrosion resistance and lubricating property.

The utility model relates to the technical field of insulating oil production, in particular to a decoloring treatment device for insulating oil production. The device is reasonable in structural design and mainly comprises the treatment box, the annular filter box, the first stirring mechanism, the second stirring mechanism, the backflow pipe and the backflow pump, the annular filter box is used for loading granular adsorbents, the density of the granular adsorbents is equivalent to that of insulating oil, the granular adsorbents can suspend in the insulating oil, automatic dispersion is achieved, and the service life of the granular adsorbents is prolonged. The first stirring mechanism is used for stirring oil in the hollow area and the lower area of the annular filter box, the second stirring mechanism is used for stirring the lubricating oil and the granular adsorbent in the annular filter box, and the backflow pipe can be used for circularly transferring the lubricating oil on the bottom layer to the top layer; in this way, full contact between the insulating oil and the granular adsorbent can be guaranteed, and the granular adsorbent after adsorption saturation can be periodically updated.

The invention belongs to the technical field of coal mine machinery lubrication and hydraulic transmission, and discloses an environment-friendly total-synthesis concentrated solution for a hydraulic support and a preparation method of the concentrated solution. The biological sensing microcapsule corrosion inhibitor is characterized by comprising 0.5%-3.0% of a biological sensing microcapsule, 8.0%-15.0% of a main corrosion inhibitor, 2.0%-6.0% of an auxiliary corrosion inhibitor, 4.0%-10.0% of a water-soluble lubricant, 0.05%-0.2% of an anti-foaming agent, 1.0%-3.0% of a pH buffering agent and deionized water. Wherein the biological sensing microcapsule has a core-shell-shell structure, is integrated with electroactive microorganisms, an electron mediator carrier and a corrosion inhibition precursor release layer, and can trigger targeted release of benzotriazole derivatives when the pH value of a local corrosion microarea is less than or equal to 5.5. The corrosion inhibitor has excellent corrosion protection performance and environment-friendly characteristics, effectively overcomes the problem of inactivation of microorganisms under severe hydraulic working conditions through a microcapsule encapsulation strategy, realizes accurate matching of corrosion signal in-situ sensing and corrosion inhibition response, remarkably improves the anti-rust performance under high-shear and wide-temperature-range working conditions, and has wide application prospects. And meanwhile, the requirements of environmental protection and sealing material compatibility are met.

The application discloses long-life bearing rust-proof oil and a preparation method and application thereof. The long-life bearing rust-proof oil comprises the following components in parts by weight: 65-90 parts of base oil, 3-20 parts of barium sulfonate, 0.5-5 parts of calcium sulfonate, and 0.5-4 parts of extreme pressure anti-wear agent. The barium sulfonate is at least one selected from neutral barium sulfonate and basic barium dinonylnaphthalene sulfonate; and the calcium sulfonate is at least one selected from medium alkaline petroleum calcium sulfonate, low alkaline calcium sulfonate, synthetic calcium sulfonate and dinonylnaphthalene calcium sulfonate. The long-life bearing rust-proof oil can realize long-period rust-proof of bearings and achieves good technical effects. In the prior art, the protection performance of bearing rust-proof oil is not long-term effective, the long-life bearing rust-proof oil has good salt fog performance and damp heat performance, and has a wide application market.

The application belongs to the technical field of rust-proof aerosol, and particularly discloses a general-purpose rust-proof lubricating oil aerosol and a preparation method thereof.The general-purpose rust-proof lubricating oil aerosol comprises, in percentage by mass, 80-90% of base oil, 1-5% of film forming agent, 2-8% of rust-proof agent, 0.3-5% of lubricant and 0.1-0.5% of dehydrating agent; the base oil is composed of solvent oil D80 and mineral oil 500N in a mass ratio of (3.5-4.5):1.The aerosol can not only solve the problem of product quality affected by rust in daily life and industrial production, but also effectively solve the rust of metal materials, provide better rust-proof protection for the metal materials, increase the lubricating performance of the metal materials, and effectively dissolve the rust, adhesives and the like on the surface of the metal materials due to the excellent permeability, so that the surface of the metal materials is kept clean and bright.

A neutralization processing system for an ammonia-containing waste fluid, includes: one or more sludge tanks; a sludge discharge line configured to supply the waste fluid to the sludge tank; a neutralizer supply line configured to supply a neutralizer to the sludge tank; and a sensor configured to measure pH of the waste fluid or an ammonia concentration of the waste fluid.

No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner (1) for a vehicle includes a refrigerant circuit (10) and a refrigerant that is sealed in the refrigerant circuit (10). The refrigerant circuit (10) includes a compressor (80), a first heat exchanger (85), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (82), a cooling control valve (87), and a second heat exchanger (86), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.

This application provides a cutting fluid comprising an alcohol-based base fluid, a wetting agent, an extreme pressure lubricant, an alkaline pH adjuster, and pure water. The alcohol-based base fluid accounts for 50.0%-55.0% of the total mass of the cutting fluid, the wetting agent accounts for 10.0%-15.0% of the total mass, the extreme pressure lubricant accounts for 1.0%-3.0% of the total mass, and the alkaline pH adjuster accounts for 0.3%-0.5% of the total mass, with the remainder being pure water. The wetting agent is an ethylene oxide-propylene block copolymer obtained by reacting a fatty alcohol initiator, ethylene oxide, and propylene under a catalyst. The block copolymer is end-capped with ethylene oxide ether, and the fatty alcohol initiator is selected from C8-C... 12 The isomeric alkyl alcohol. When the cutting fluid provided in this application is used for diamond wire cutting of silicon rods, the yield of silicon wafers is relatively good.