WO2018076189A1 - Unité extérieure pour climatiseur sans givre - Google Patents

Unité extérieure pour climatiseur sans givre Download PDF

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Publication number
WO2018076189A1
WO2018076189A1 PCT/CN2016/103319 CN2016103319W WO2018076189A1 WO 2018076189 A1 WO2018076189 A1 WO 2018076189A1 CN 2016103319 W CN2016103319 W CN 2016103319W WO 2018076189 A1 WO2018076189 A1 WO 2018076189A1
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Prior art keywords
air
compressor
fan
outdoor unit
frequency conversion
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PCT/CN2016/103319
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English (en)
Chinese (zh)
Inventor
孙海潮
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孙海潮
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Application filed by 孙海潮 filed Critical 孙海潮
Priority to PCT/CN2016/103319 priority Critical patent/WO2018076189A1/fr
Publication of WO2018076189A1 publication Critical patent/WO2018076189A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components

Definitions

  • the invention belongs to the technical field of air conditioning, and relates to only a refrigeration heat pump type frost-free air conditioner outdoor unit.
  • the existing refrigerating heat pump type air conditioner includes an indoor unit and an outdoor unit.
  • the indoor unit When cooling, the indoor unit is an evaporator, the indoor unit evaporates and absorbs heat, the outdoor unit is a condenser, and condenses and releases heat; when heating, the indoor unit is a condenser and condenses.
  • the outdoor unit Exothermic, the outdoor unit is an evaporator, and the heat is evaporated.
  • the condenser, the evaporator is collectively referred to as a heat exchanger.
  • the air conditioner outdoor unit usually divides the outdoor unit into two spaces by the middle partition plate, and a fan and a heat exchanger are arranged in a space on one side of the middle partition plate.
  • the invention is called a fan and a heat exchanger space, and the space is relatively large.
  • the inlet and outlet of the fan are open and open to the outside of the outdoor unit, and the compressor and the electronic control module are arranged in a space on the other side of the middle partition.
  • the invention is called a compressor and an electronic control module space, and the space is relatively small, and the compressor is relatively small.
  • the space around the electronic control module is enclosed by the middle partition and the outdoor casing, and is basically closed to the outside of the outdoor unit casing. If it is an inverter air conditioner, the electronic control module further includes a frequency conversion module.
  • the frequency conversion electronic control module is set in the frequency conversion electric control box.
  • the compressor and the variable frequency electronic control module when the air conditioner is running, the compressor and the variable frequency electronic control module must generate a large amount of heat, especially the heat generated by the frequency conversion module is larger, which is generated by the entire outdoor unit. If the temperature is the highest, the heat is the highest. If the heat is not dissipated in time, the inverter electronic control module will not work normally or even burn out. When the compressor temperature is too high, it will affect the performance and service life of the compressor. When the inverter module and compressor temperature are too high, The over-temperature protection device is triggered to force the air conditioner to stop running, which affects the use of the air conditioner. Therefore, the frequency conversion electronic control module and the compressor must be dissipated.
  • variable frequency electric control module adopts these two heat dissipation methods: 1. On the variable frequency electric control box with the variable frequency electronic control module, the air cooling radiator is disposed, and the radiator can be attached.
  • the middle partition is designed on the side of the fan and the heat exchanger, and the electric control box is placed on the middle partition. However, most of the electric control box is still located on the side of the compressor and the variable frequency electronic control module, and the radiator can also be attached to the middle partition. It is installed on the side of the compressor and the electronic control module.
  • the side of the radiator is placed on the side of the middle partition, it is the negative pressure difference formed by the operation of the fan, so that the outdoor air passes through the heat exchanger through the radiator or compressor and The air on the side of the electronic control module is cooled by the heat exchange of the radiator and then discharged by the fan to the outdoor unit.
  • the cooling circuit is used to cool the heat-dissipating electronic control module, and the compressor usually dissipates heat for natural heat dissipation and heat dissipation.
  • the heat radiated from the variable frequency electronic control module and the compressor is discharged to the outdoor unit, and the heat generated by the variable frequency electronic control module and the compressor is consumed by the electric energy, and this part of the energy is directly discharged. Outdoor machine, wasted energy.
  • the fan and heat exchanger parts and the outdoor unit are completely open.
  • the heat exchanger inlet surface needs to be designed. Large, so the negative pressure air inlet area formed when the fan is running is very large, which is the air inlet surface of the whole heat exchanger, and the radiator only occupies a small part of it, and is located at the edge of the air inlet side of the fan blade. The area, and thus the amount of air flowing through the radiator is very small, and the air cooling and heat dissipation efficiency is very low.
  • the frequency conversion electronic control module Especially in the summer when the ambient temperature is high, the frequency conversion electronic control module often has poor heat dissipation, and the long-term high temperature operation easily causes the entire system to over-temperature protection and stops. Operation, the frequency conversion electronic control module will shorten the service life under such working conditions for a long time, or even burn out, and the refrigerant cooling the variable frequency electronic control module, the temperature difference between the refrigerant temperature and the variable frequency electronic control module is very large, and it is easy to Condensation is formed on the surface of the frequency conversion electronic control module and on the electronic control circuit board, thereby bringing about a hidden danger of the short circuit of the frequency conversion electronic control module circuit board. When the air conditioner is heating, condensation water will be generated on the surface of the evaporator tube.
  • the condensation water When the ambient air temperature is lower than 5 °C, the condensation water will condense into a thin frost. The lower the ambient temperature, the more severe the frosting, and even the thick Frost, frost and frost will reduce and block the air passage between the fins, increase the air flow resistance, resulting in a sharp drop in the evaporative heat transfer capacity, and even cause the air conditioner to stop working and cannot heat, so the defrost device must be defrost.
  • the usual defrosting method for air conditioners is four-way reversing valve defrost. Hot gas bypass defrosting, electric heating components defrosting three. The four-way reversing valve defrost needs to interrupt the heating, and the hot gas bypass defrosting will reduce the heating to the indoors.
  • the defrosting is too late, the frost layer on the evaporator is too thick, the air passage between the fins is blocked, the air volume is reduced, the heating efficiency of the system is decreased, and the energy consumption is increased; Early, there is no frost or a small amount of frost on the evaporator, which will increase the frequency of defrost, and will also cause the system heating efficiency to decrease and increase energy consumption.
  • the object of the present invention is to provide a refrigerating heat pump type frost-free air conditioner outdoor unit, which can ensure that the air conditioner is not interrupted without reducing the normal heating after the air conditioner is started, especially if the energy consumption is not increased.
  • the outdoor unit evaporator is free of frost and becomes a frost-free air conditioner. It is difficult to accurately control the problem of starting the defrost time.
  • the outdoor unit evaporator can be supplied with air at a higher temperature than the ambient temperature, thereby improving the evaporation efficiency of the evaporator, increasing the heat of the air conditioner, improving the energy efficiency of the air conditioner, and saving energy.
  • the compressor and the variable frequency electronic control module can be cooled and cooled, so that the compressor and the variable frequency electronic control module are always outside a better working condition, effectively improving the working of the compressor and the variable frequency electronic control module.
  • the efficiency thus improves the energy efficiency of the air conditioner and ensures the normal service life of the compressor and the variable frequency electronic control module.
  • a frost-free air conditioner outdoor unit including an outdoor unit casing, an evaporator, a fan, a middle partition, a compressor and an inverter electronic control module space, and an inverter electric control box.
  • the compressor is characterized in that: the air inlet of the air inlet duct is arranged at the air outlet of the fan, and the plane formed by the air outlet of the fan is a projection surface, and the plane formed by the air inlet of the air inlet duct and the plane formed by the air outlet of the fan are The projection on the projection surface forms an overlapping surface, and the air inlet duct passes through the middle partition to communicate with the compressor and the variable frequency electronic control module space, and a wind collecting cover is arranged on the outdoor machine casing of the compressor and the frequency conversion electronic control module space.
  • the wind collecting hood is connected with the heating air supply air duct, and the fan air enters the compressor and the frequency conversion electric control module space through the air inlet air passage, flows through the compressor, and after the frequency conversion electric control box, enters the wind collecting hood and sends the wind to the wind collecting hood.
  • the tube is delivered to the inlet side of the evaporator.
  • the object of the present invention can also be realized in such a manner: a frost-free air conditioner outdoor unit, including an outdoor unit casing, a condenser, a fan, a middle partition, a compressor and an inverter electronic control module space, and an inverter electronic control
  • the box and the compressor are characterized in that: the air inlet of the air inlet duct is arranged at the air outlet of the fan, and the plane formed by the air outlet of the fan is a projection surface, and the plane formed by the air inlet of the air inlet duct and the air outlet of the fan are formed.
  • the projection of the plane on the projection surface forms an overlapping surface
  • the air inlet duct passes through the middle partition to communicate with the compressor and the variable frequency electronic control module
  • a cooling air duct is arranged between the compressor and the side panel of the outdoor unit casing.
  • the cooling air outlet air outlet passes through the outdoor machine casing and communicates with the external space of the outdoor unit, and the fan air enters the compressor and the frequency conversion electronic control module space through the air inlet air passage, flows through the compressor, and after the frequency conversion electric control box, Enter the cooling air outlet duct to discharge the outdoor unit.
  • the overlapping surface is larger than 20% of the projected area of the plane formed by the fan outlet on the projection surface.
  • the invention provides an electric heating tube in the air collecting hood.
  • the chilling air duct and the air collecting hood of the invention are provided with a damper that can be opened and closed.
  • the wind collecting hood and the air supply air duct of the invention are made of aluminum alloy material with light weight, fast heat transfer and corrosion resistance.
  • a cooling air duct partition is provided between the compressor and the side panel of the outdoor unit casing.
  • the cooling air duct damper When the air conditioner is heating, the cooling air duct damper is closed, the windshield damper is opened, the outdoor unit fan is started, and the air outside the sucked outdoor unit is exchanged by the evaporator to be cooled and then cooled to become cold air, and then discharged by the fan.
  • the air discharged by the fan has a strong wind pressure, so some of the air will flow into the air inlet of the air inlet duct set by the fan outlet, and will be integrated into the compressor and the frequency conversion electronic control module space through the air inlet duct.
  • the compressor casing When flowing through the compressor and the frequency conversion electric control box, the compressor casing is absorbed, and the heat on the frequency conversion electric control box becomes hot air.
  • the cooling air outlet damper is closed, and the air collecting hood becomes compressed.
  • the hot air will be collected into the air collecting hood and sent to the air inlet side of the evaporator through the heating air supply duct, and mixed with the air outside the fan and the evaporator space.
  • the mixed air is formed, and the mixed air temperature is higher than the air outside the fan and the heat exchanger space, that is, the ambient air temperature, the mixed air is sucked by the fan, flows through the evaporator on the evaporator, and the heat is exchanged.
  • the mixed air having a temperature higher than the ambient air temperature flows through the evaporation tube on the evaporator and the heat exchange fins evaporate heat exchange, thereby improving the evaporation efficiency of the evaporator and increasing the heat generation, and at the same time,
  • the air conditioner When the air conditioner is heating, condensation water will be generated on the surface of the evaporator tube.
  • the ambient air temperature is lower than 5 °C
  • the surface temperature of the evaporator tube sheet will be lower than 0 °C
  • the condensation water will condense into a thin frost. Therefore, when the ambient air temperature is lower than 5 °C, the air conditioner is eliminated on the outdoor unit evaporator as long as the ambient temperature is not low enough to change the temperature of the mixed air formed by mixing the air outside the fan and the evaporator space to more than 0 °C.
  • frost formation the air conditioner has no frost and heat, and becomes a frost-free air conditioner.
  • the outdoor unit evaporator Although the surface of the segment will freeze and freeze in an environment below 0 °C, the rate of freezing and freezing will be greatly reduced, thereby reducing the opening frequency and defrost time of the auxiliary defroster. Energy saving.
  • the invention defrosting the surface of the evaporator tube piece by providing an electric heating tube in the collecting hood to increase the temperature of the air flowing through the collecting hood, and reducing the opening frequency and the defrosting time of the auxiliary defrosting device, Under the same working condition, the electric defrosting power consumption of the electric heating pipe of the invention is reduced, the defrosting time is short and the speed is fast, and the user's comfort during air conditioning heating is improved.
  • the air conditioner is heated at an ambient temperature where the air temperature is lower than 5 ° C or higher than 5 ° C
  • the temperature of the mixed air flowing through the evaporator of the present invention is always higher than the temperature of the ambient air, so that the evaporation efficiency of the outdoor unit is improved. Improve heating energy efficiency, save energy and energy.
  • the air outlet of the cooling air duct is opened, and the air damper of the air collecting hood is closed.
  • the air outside the outdoor unit is heated by the condenser and then turned into hot air, which is discharged by the fan to the outdoor unit.
  • the air temperature of the machine is increased to hot air as soon as possible, but the temperature of the hot air is always lower than the surface temperature of the inverter electric control box by 12 ° C or higher, which is lower than the surface temperature of the compressor casing.
  • the temperature of the hot air is allowed in the air conditioning condition.
  • the maximum ambient temperature of 43 °C is only about 52 °C, and the surface temperature of the compressor casing will reach 100 °C.
  • the temperature of the inverter module in the variable frequency electric control box will be close to the limit operating temperature of the inverter module. °C, therefore, the hot air temperature is still much lower than the temperature of the compressor casing and the surface of the variable frequency electric control box.
  • a part of the hot air discharged by the fan passes through the air inlet of the air inlet duct set by the fan air outlet, and is collected by the air inlet duct. Entering the space of the compressor and the variable control module, when passing through the compressor and the frequency conversion electric control box, the compressor casing will be absorbed, and the heat on the frequency conversion electric control box becomes hotter hot air.
  • the cooling air outlet duct becomes the only air outlet passage of the compressor and the variable frequency electric control module space, and the hot air flows out of the outdoor unit through the cooling air outlet duct to achieve the compressor and the frequency conversion electronic control.
  • the purpose of cooling and cooling of the box, the compressor and the variable frequency electric control box are cooled and cooled, so that the compressor and the frequency conversion electric
  • the variable frequency electronic control components on the control box are always operated under a suitable temperature condition, which improves the performance and service life of the compressor and the variable frequency electronic control components.
  • the air conditioner adopts a flammable refrigerant system such as R290, which is increasingly popular, when the refrigerant circuit in the space of the outdoor unit compressor and the variable frequency electronic control module leaks or is difficult to avoid, the micro leaks at various sealed joints are accumulated. After the concentration, the flammable refrigerant enters the frequency conversion electric control box, and there may be a crisis of ignition and ignition of the electronic components in the frequency conversion electric control box.
  • the air conditioner of the present invention always has a heating or cooling operation. A part of the air of the exhaust fan passes through the air inlet of the air inlet duct provided by the air outlet of the fan, and is collected into the space of the compressor and the frequency conversion electronic control module.
  • the frequency conversion electric control box After passing through the compressor, the frequency conversion electric control box is discharged to the outdoor unit. If a refrigerant leak occurs, the leakage occurs. The refrigerant is also discharged to the outdoor unit at any time, thereby eliminating the possibility that the leakage of the outdoor unit of the flammable refrigerant system may cause an explosion.
  • the air inlet duct of the present invention is spatially connected to the compressor and the variable frequency electronic control module through the middle partition, and can also be designed to bypass the middle partition and communicate with the compressor and the variable frequency electronic control module, and there is no substantial difference between the two.
  • the air inlet duct has an air inlet and an air outlet, and the air inlet duct passes through the middle partition to communicate with the compressor and the frequency conversion electric control module, that is, the air outlet of the air inlet duct is in communication with the compressor and the frequency conversion electronic control module.
  • the air inlet of the air inlet duct is arranged at the air outlet of the fan to guide the air inlet of the wind duct to the air outlet of the fan, and the air outlet of the fan refers to the air outlet of the fan which is perpendicular to the direction of the wind of the fan when the fan exits the fan duct.
  • the air outlet formed by the cross section of the fan air outlet duct is the air outlet of the fan referred to in the present invention.
  • the fan air outlet at this time That is, the cross-section of the fan outlet duct at the first contact point of the fan outlet and the inlet of the inlet duct, the essence of this arrangement is the same as the inlet of the inlet duct at the fan outlet.
  • the cross-sectional shape of the air duct and the air passage duct passing through the middle partition and the compressor and the variable frequency electric control module can be designed into circular, square, rectangular and other shapes as long as the ventilation is smooth.
  • the overlapping surface may be two projections.
  • the part of the projection surface overlaps, and the projection surface of the plane formed by the fan air outlet on the projection surface may cover the projection surface formed by the air inlet of the air inlet duct.
  • the air inlet of the air inlet duct can introduce the air volume of the air outlet of the fan, and the object of the invention can be realized.
  • the air volume of the air inlet of the air inlet of the air inlet duct is too small to enter the space of the compressor and the frequency conversion electronic control module. It is impossible to fully exchange heat with the compressor and the variable frequency electronic control module, and the effect of the invention is poor, and only the area of the overlapping surface is larger than the projected area of the plane formed by the fan outlet on the projection surface.
  • the air inlet of the air inlet duct can introduce a large air volume of the air outlet of the fan. After entering the space of the compressor and the frequency conversion electronic control module, it can be fully exchanged with the compressor and the variable frequency electronic control module.
  • the invention achieves the purpose of the invention and the effect of the invention without increasing the energy consumption, and the larger the overlapping surface is formed, the air inlet duct
  • 100% of the projected area on the upper side, that is, the projection surface formed by the air inlet of the air inlet duct is the same as the projection surface formed by the air outlet of the fan. At this time, the air outlet of the fan air outlet will be introduced by the air inlet of the air inlet duct.
  • the air exchanged with the compressor and the variable frequency electric control box does not need such a large amount of air.
  • the invention recommends that the overlapping surface be smaller than 60% of the projected area of the plane formed by the fan outlet on the projection surface. Because of this design of the invention, the characteristics of the wind outlet of the fan outlet are fully utilized, so that the air outlet of the fan inlet introduced by the inlet of the air inlet duct has a larger air volume, so that A special air-inducing fan is required to be introduced, so that the object of the invention and the effect of achieving better results can be achieved without increasing the energy consumption.
  • the air hood is arranged on the outdoor machine casing of the compressor and the frequency conversion electronic control module space, and the wind hood can also be arranged in the middle partition or the compressor and the other parts of the frequency conversion electronic control module space, and the air passage and the set can be achieved.
  • the heating air duct connected to the hood is transported to the air inlet side of the evaporator for the substantial purpose.
  • the air supply duct of the present invention has a rectangular tube with a rectangular shape at the middle and a semicircular shape at both ends, and the flat tube is disposed around the heat pipe of the evaporator.
  • the heat pipe of the evaporator is a set of parallel "C” type, flat tube Also set as a set of parallel "C” type, close to the heat sink arrangement on the evaporator heat pipe, the flat surface in the middle of the flat tube is parallel to the flow direction of the air entering the evaporator, and the flat tube and the heat pipe in the evaporator are Set at the same horizontal line, the short side of the rectangle in the middle of the oblate tube grows to the same diameter as the heat pipe of the evaporator, and the number of the oblate tubes is half of the number of heat pipes on the evaporator, and the heat pipes of the evaporator are arranged one at a time.
  • the wind pipe will not increase the inlet air resistance of the evaporator.
  • One end of the oblate pipe is connected to the collecting hood, and the other end is closed.
  • a flat or array of hot air ducts is uniformly arranged on the flat surface of the oblate pipe.
  • the tuyere has an unlimited number of tuy Guatemala.
  • the present invention proposes that the tuyere is circular, with a diameter of 3 mm, and a tuyere is opened every 20 mm.
  • the arrangement of the oblate tube will pass the mixed air led by the collecting hood through the oblate On the tube Shunting air uniformly throughout the outer surface of the evaporator inlet side tube sheet of the evaporator to ensure that the respective positions are obtained substantially uniform mixing of the air inlet.
  • the air supply duct can also be an elliptical tube and a round tube, and the other arrangement is similar to the above-mentioned oblate tube, and the function is substantially the same as that of the oblate tube air supply duct.
  • a cooling air duct partition is arranged between the compressor and the side panel of the outdoor unit casing.
  • the upper and lower partitions of the partition are closed with the top cover and the bottom of the casing, and the side of the partition is connected with the casing of the outdoor unit, and the width extends over the frequency conversion electronic control.
  • the box has an air outlet on the outdoor unit casing between the cooling air duct partition and the side panel of the outdoor unit casing, so that a cooling air outlet partition is formed between the air duct partition and the side panel of the outdoor unit casing.
  • the cooling air outlet duct, the cooling air outlet duct partitioning function is to guide the air to fully exchange with the compressor and the frequency conversion electric control box, and then enter the air collecting hood or enter the cooling air outlet air duct, and when cooling, cooling
  • the air duct partitions direct the air flowing into the space of the compressor and the electronic control module to guide into the air collecting hood.
  • the cooling air duct partitions will flow into the space of the compressor and the electronic control module to change the flow direction. After passing the compressor to the frequency conversion electric control box, the corner is turned back into the cooling air outlet duct to discharge the outdoor unit.
  • the collecting hood is disposed on the rear back panel of the outdoor unit casing that is relatively far from the air guiding duct, and the collecting hood air collecting opening is designed as large as possible, so that the flowing air can be collected into the collecting hood without resistance, and the collecting hood And the air duct can be made of aluminum alloy material with light weight, fast heat transfer and corrosion resistance.
  • the control of the opening and closing of the damper and the electric heating pipe on the cooling air outlet duct and the collecting hood is a well-known technique in the field of air conditioning design, and the present invention does not describe it.
  • the present invention has the following advantages and positive effects: 1.
  • the present invention can be used in a case where the ambient temperature is low.
  • the frost-free air-conditioner of the air-conditioner evaporator becomes a frost-free air conditioner; when the ambient temperature is lower, the rate of freezing and freezing of the air-conditioner evaporator is lowered, the opening frequency and the defrosting time of the auxiliary defrosting device are reduced, and the air-conditioning heating is improved. Energy efficiency, energy saving and energy saving.
  • the temperature of the mixed air flowing through the evaporator of the present invention is always higher than the temperature of the ambient air, so that the evaporation efficiency of the outdoor unit is improved, and the energy efficiency of the air conditioner is improved. Increased heating capacity.
  • the invention can heat and cool the frequency conversion electronic control components of the compressor and the electric control box without increasing the energy consumption, and improve the compressor and the frequency conversion electronic control component. Performance and service life.
  • the invention makes the frost-free air-conditioner of the air-conditioner evaporator into a frost-free air conditioner in the case of low ambient temperature, cooling the compressor and the frequency conversion electric control box, and eliminating leakage of the air-conditioner outdoor unit of the flammable refrigerant system may cause an explosion
  • the purpose of the invention of the hidden danger is achieved on the basis of the existing air conditioner without increasing the energy consumption, and has the advantage of achieving zero cost and achieving the purpose.
  • 1 is a schematic view showing the structure of an outdoor unit of the present invention.
  • Figure 2 is a schematic view of the wind collecting hood and the air supply duct of the present invention.
  • Figure 1 in Figure 2 is a heating air duct
  • 2 is an electric heating tube
  • 3 is a windshield
  • 4 is an outdoor unit casing
  • 5 is a variable frequency electric control box
  • 6 is a compressor
  • 7 is Cooling air duct
  • 8 is the cooling air duct partition
  • 9 is the outdoor unit partition
  • 10 is the induced air duct
  • 11 is the fan
  • 12 evaporator 13 is the heating air duct outlet.
  • the air conditioner When the air conditioner is heating, the air conditioner is energized, the damper of the cooling air duct 7 is closed, the damper of the air collecting hood 3 is opened, the compressor 6 is started, and the refrigerant in the heating circuit enters the evaporator 12 in the outdoor unit 4, Under the action of the fan 11, the air is taken in.
  • the inhaled air passes through the evaporator 12, the heat is absorbed, the air is cooled, and the cooled air is discharged from the outdoor unit by the fan 11, and the cooling air discharged from the fan 11 has a strong air.
  • the wind pressure is set at the air inlet on the air inlet duct 10 of the air outlet of the fan 11, and the partially cooled air can be introduced into the space of the compressor 6 and the frequency conversion electronic control module 5, and flows through the compressor 6 and the frequency conversion electronic control.
  • the cartridge 5 exchanges heat with the compressor 6 and the variable frequency electric control box 5, and absorbs the heat accumulated in the compressor 6 and the variable frequency electric control box 5 to become hot air which is heated, and the hot air which is heated is collected by the windshield 3
  • the arrow on the air outlet 13 of the heating air duct represents the air outlet and the air outlet direction, and the air outlet duct of the heating air duct is provided.
  • the hot air flowing out merges with the air taken in from the outside of the outdoor unit to become a mixed air.
  • the temperature of the mixed air will be higher than the temperature of the air taken in by the outside of the outdoor unit, that is, higher than the ambient temperature of the outdoor unit.
  • the mixed air is absorbed by the evaporator 12, and the mixed air is cooled.
  • the chilled mixed air is discharged from the outdoor unit by the fan 11, and the circulation is performed, and the air conditioner realizes heating.
  • the electric heating tube 2 is activated to increase the temperature of the air flowing through the collecting hood, thereby increasing the temperature of the mixed air to defrost the surface of the evaporator tube piece.
  • the air conditioner is energized, the cooling air outlet damper is opened, the collecting hood damper is closed, the compressor 6 is started, the evaporator 12 becomes a condenser, and the refrigerant in the refrigeration circuit enters the condenser 12 in the outdoor unit 4,
  • the air is taken in under the action of the fan 11, and the sucked air is absorbed by the condenser 12, and the air is heated to become hot air.
  • the temperature is increased to hot air, the temperature of the hot air is still lower than that of the compressor casing.
  • the hot air is exhausted by the fan 11 to the outside of the outdoor unit, and the air inlet is arranged on the air inlet duct 10 of the air outlet of the fan 11, and part of the hot air is introduced into the compressor 6 and the frequency conversion electric control module. 5 space, when flowing through the compressor 6 and the variable frequency electric control box 5, heat exchange with the compressor 6 and the variable frequency electric control box 5, absorbing the heat accumulated on the compressor 6 and the variable frequency electric control box 5, and cooling the wind
  • the road 7 is discharged to the outside, and thus circulates, and the purpose of cooling and cooling of the compressor 6 and the variable frequency electric control box 5 is achieved.
  • variable frequency electronic control module in the description of the embodiment is the variable frequency electric control box.

Abstract

L'invention concerne une unité extérieure pour un climatiseur sans givre, comprenant un boîtier d'unité extérieure (4), un évaporateur (12), un ventilateur (11), une plaque de séparation centrale (9), un compresseur (6), un boîtier de commande électrique à conversion de fréquence (5) et un espace de compresseur et de module de commande électrique à conversion de fréquence. Une entrée d'air d'un conduit d'air induit est disposée au niveau d'une sortie d'air du ventilateur (11) et un plan formé par la sortie d'air du ventilateur (11) sert de plan de projection. Une projection d'un plan formé par l'entrée d'air du conduit d'air induit sur le plan de projection et une projection du plan formé par la sortie d'air du ventilateur (11) sur le plan de projection forment une surface en chevauchement. Le conduit d'air induit pénètre à travers la plaque de séparation centrale (9) pour communiquer avec l'espace de compresseur et de module de commande électrique à conversion de fréquence. Une hotte collectrice d'air (3) est disposée sur le boîtier d'unité extérieure (4) de l'espace de compresseur et de module de commande électrique à conversion de fréquence. La hotte collectrice d'air (3) est reliée à un tuyau d'air d'alimentation en air de chauffage (1). L'air évacué par le ventilateur (11) entre dans l'espace de compresseur et de module de commande électrique à conversion de fréquence par le biais du conduit d'air induit, s'écoule à travers le compresseur (6) et le boîtier de commande électrique à conversion de fréquence (5), puis entre dans la hotte collectrice d'air (3) et est acheminé vers un côté d'entrée d'air de l'évaporateur (12) par le biais du tuyau d'air d'alimentation en air de chauffage (1) et s'écoule à l'extérieur. L'unité extérieure a les caractéristiques suivantes : un chauffage sans givre est mis en œuvre, une dissipation thermique et une réduction de température sont exécutées sur le compresseur et un module de commande électrique à conversion de fréquence, la capacité thermique est grande et l'efficacité énergétique est élevée.
PCT/CN2016/103319 2016-10-25 2016-10-25 Unité extérieure pour climatiseur sans givre WO2018076189A1 (fr)

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