Do you know these common refrigeration and air conditioning terms?

1, work, energy, horsepower, cooling capacity
1 joule (j) = 1 watt (w) x 1 second (s)
(1) Energy unit:
National system: j, kj; English system: cal, kcal
1 j = 0.2388 cal
(2) Power units:
National system: w, kw; English system: kcal/h (large calories)
1 kcal/h = 1.163 w
1 kw = 860 kcal/h
Customary common unit: horsepower (horse power) HP, cold tons RT
1 HP = 735 w
1 RT = 3.516 kw = 3024 kcal/h
Description:
Cold ton: is an imperial unit of cooling capacity. One cold ton is the amount of cold needed to freeze one ton of 0°C water into 0°C ice in 24 hours.
The United States is using 2,000 pounds (907.2kg ) as a ton. Therefore, 1 U.S. cold tons = 12659 kj / h; that is: 1 RT = 3.516kw
(3) the relationship between the horsepower and cooling capacity
In the small air conditioning project 1HP refers to the compressor input 735W power can produce the cooling capacity. With the general meaning of the power unit is not the same as the horse. The 1HP here is calculated based on the energy efficiency ratio. In Japan, it is generally believed that the average energy efficiency ratio of air-conditioning compressors is 3.4, so the cooling capacity produced by inputting 735W of power is 2500W.
2. Pressure
The vertical force acting on a unit area is called pressure (physically called pressure). The international unit of pressure is Pascal, Pa for short, expressed in Pa.
1 standard atmospheric pressure = 0.1MPa = 760mmHG mercury column;
1 atm = 1.03323 kg/cm2. pressure;
1MPA = 10 atmospheric pressure = 10.3323kg/cm2;
That is, a pressure equivalent to 10.332 kg/cm2;
1MPa = 1,000,000 Pa = 1.00 N/mm2 = (1/9.8) kgf/mm2.
3, temperature
The most commonly used thermometers: mercury thermometers and alcohol thermometers. Thermometer temperature scale generally have: Celsius temperature scale, Fahrenheit temperature scale (Europe and the United States with) and absolute temperature scale.
1) Celsius temperature scale (℃): is the choice of pure water at an atmospheric pressure freezing point as 0 ℃, boiling point as 100 ℃, between the two 100 equal parts, each set as 1 ℃ of the temperature representation system.
2) absolute temperature scale (K): the freezing point of water as +273.16K, boiling point as 373.16K, and theoretically the point of the complete cessation of molecular thermal movement within the object as absolute zero, that is, 0 (K)).
Celsius temperature scale and the relationship between the absolute temperature scale is as follows: T = t + 273.16
(3) Fahrenheit temperature scale (°F): the freezing point of water at standard atmospheric pressure is set at 32 °F, while the boiling point is set at 212 °F, 180 equal parts between the two, each part is set at 1 °F. In Europe and the United States are more widely used.
The following conversion relationship exists between Celsius and Fahrenheit:
t = 5(F-32)/9;
F = 9t/5+32;
In the formula:
t - Celsius temperature;
F-Fahrenheit temperature;
(4) dry bulb temperature and wet bulb temperature: dry bulb temperature, that is, the temperature measured by an ordinary thermometer wet bulb temperature is wrapped in a thermometer with a wet cloth, due to the evaporation of water caused by the temperature indication decreased, the temperature at this time is called the wet bulb temperature.
4, heat, vaporization, liquefaction
Heat transfer pathways are: conduction, convection, radiation.
Thermal convection: thermal convection is a heated liquid or gas movement to transfer heat; thermal radiation: thermal radiation is infrared radiation to emit and transfer heat.
Vaporization: the process of changing a substance from a liquid to a gas. Vaporization: evaporation (surface vaporization), boiling (surface and internal vaporization at the same time). Measures to accelerate vaporization: increase temperature, decrease surface pressure.
Liquefaction: the process of changing a substance from a gas to a liquid. Measures to accelerate liquefaction: lower the temperature, increase the pressure.
5, sensible heat latent heat
sensible heat (sensible cold) load: the solid, liquid or gaseous material heating, as long as its form is unchanged, the heat is absorbed, the material temperature increases, the amount of absorbed heat in the temperature can be shown, that is, not to change the form of the material and the heat caused by the temperature change is called sensible heat.
Latent heat (latent cold) load: heating of liquid water, the temperature of the water rises, when it reaches the boiling point, although the heat continues to join, but the temperature of the water does not rise, has been staying at the boiling point, the heat added only to make the water into water vapor, i.e., from the liquid state into a gaseous state. This does not change the temperature of the material and cause changes in the state of matter (also known as phase change) of the heat is called latent heat.
Total heat is equal to the sum of sensible heat and latent heat: sensible heat / total heat = SHR (sensible heat ratio).
6, refrigeration/heat energy efficiency ratio refrigeration/carrier refrigerant
Cooling capacity: cooling capacity refers to the air conditioner and other refrigeration machine for refrigeration operation, the total amount of heat removed from the confined space, room or area within a unit of time.
Heat production: Heat production is the sum of heat values provided by an air conditioning system under heating conditions or a hot water preparation system in a unit of time, usually in W, kW.
COP: In the rated operating conditions and under the conditions specified, the air conditioner for heat pump heating operation, the ratio of heat production and effective input power, the value of W / W said.
EER: In the rated operating conditions and under the conditions specified, the air conditioner for refrigeration operation, the ratio of cooling capacity and effective input power, the value of W / W said.
Refrigerant: Refrigerant, also known as refrigerant, refrigerant, snow, is a variety of heat engines to complete the energy conversion medium material. These substances usually increase power by reversible phase changes (e.g., gas-liquid phase change). For example, steam in a steam engine, snow in a refrigerator, etc.. In a typical steam engine, the thermal energy of the steam is released and converted into mechanical energy to generate motive power, while the snow in a refrigeration machine is used to transfer heat from a low temperature to a high temperature.
Carrier refrigerant: The carrier refrigerant is the intermediate cooling medium that accomplishes the transfer of heat from the cooled system (object or space) to the refrigerant in an indirectly cooled refrigeration unit. [1] This intermediate cooling medium is also called the second refrigerant. Air-conditioning engineering, industrial production and scientific experiments, often using refrigeration devices to indirectly cool the cooled material, or the refrigeration device to produce the cold amount of long-distance transmission, at this time, need an intermediate material, in the evaporator is cooled down, and then cooled with it to cool the cooled material, this intermediate material is called the refrigerant!
7, saturation temperature and saturation pressure
Saturation temperature: at a given pressure, the gas-liquid two-phase saturation state when the corresponding temperature. The saturation temperature is determined by its pressure, the higher the pressure, the higher the saturation temperature, and vice versa, the lower. A substance is always at a certain saturation temperature when it reaches saturation at a certain pressure.
Saturation pressure: the pressure at which the gas and liquid phases are saturated at a given temperature. Depends on the temperature. The higher the temperature, the higher the saturation pressure, and vice versa. When a substance is saturated at a given temperature, it is always at a certain saturation pressure.
Saturation temperature and saturation pressure in the application of refrigeration devices often use the saturation temperature of the refrigerant and saturation pressure one-to-one correspondence of the characteristics of the pressure to achieve the purpose of adjusting the temperature.
Saturated liquid: the temperature is equal to the corresponding saturation temperature of the pressure in the liquid.
Saturated Vapor: Also known as "dry steam", the temperature is equal to the pressure at which the corresponding saturation temperature of the steam.
Saturated Vapor Pressure: The pressure at which a saturated vapor is in equilibrium with its liquid.
Supersaturation: A state of subequilibrium. In this state, the pressure of the vapor is higher than the saturation pressure at the corresponding temperature.
Supersaturated Steam: Steam in a state of subequilibrium. Its pressure is higher than the saturation pressure at the corresponding temperature.
Superheating: The process of heating steam to a temperature higher than the saturation temperature at the corresponding pressure.
Superheated Steam: Steam whose temperature is higher than the saturation temperature at the corresponding pressure.
Superheat: The difference between the temperature of a superheated vapor and its saturation temperature.
Subcooling: The process of cooling a liquid to a temperature below its saturation temperature at the corresponding pressure.
Subcooled Liquid: A liquid whose temperature is lower than its saturation temperature at the corresponding pressure. The difference between the temperature of the subcooled liquid and the saturated liquid temperature is called the "degree of subcooling". Commonly used in refrigeration equipment.
8.Humidity Pressure
Absolute humidity: the amount of water vapor contained in a unit volume of air.
Relative humidity: at a certain temperature, the actual amount of water vapor in the air (by weight) and the air at that temperature can contain the ratio of water vapor.
Static pressure: due to the irregular movement of air molecules and impact on the wall of the pressure generated is called static pressure. Atmospheric pressure as the zero point of the static pressure is called the relative static pressure. Air conditioning in the static pressure of the air are relative static pressure. Static pressure is higher than atmospheric pressure is positive, lower than atmospheric pressure is negative.
Dynamic pressure: the pressure generated by the air flow, as long as the air flow in the duct has a certain dynamic pressure, the value is always positive.
Full pressure: full pressure is the algebraic sum of static and dynamic pressure.
9, technology / comfort air conditioning
Comfort air conditioning: Indoor personnel as a service object, the purpose is to create a comfortable working or living environment, in order to facilitate the improvement of work efficiency or to maintain a good level of health. Such as residential, office, theater, department store air conditioning.
Process air conditioning: the purpose is to meet the needs of the production process and scientific research, air conditioning design at this time is to ensure that the process requirements of the main, indoor personnel comfort is secondary. Computer room, telephone switchboard room, precision electronics workshop and some special laboratories, museums and other air conditioning.
Xinxiang Yukun Refrigeration Technology Co. is a production and sales of refrigeration two apparatus parts and sheet metal products, mainly engaged in condenser, evaporator, heat exchanger, reservoir, filter drier, Fin Evaporator (condenser), Stamping Parts, sheet metal parts, aluminum tubes for refrigeration, etc.

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Our company mainly produces products for:Fin Evaporator.Fin Type Condenser.Capillary Tube.Aluminum Coolant Reservoir.Plate Reinforcement Parts.Stamped Parts.Aluminum Tube.Instrument Testing Equipment.
Supermarket Refrigeration Show Case Copper Condenser Coil
1. OEM or ODM can be accepted
2. Fin type: Louver or corrugated
3. Be customerized according to samples and drawings.
4. High quility and low price and energy saving 60% (CE, RoHS, EMC and ISO9001 certification) The CD series products can be used in Various specificantion Condensing Units .