WO2018076252A1

WO2018076252A1 - Refrigerating heat pump type frost-free air conditioner

Info

Publication number: WO2018076252A1
Application number: PCT/CN2016/103648
Authority: WO
Inventors: 孙海潮
Original assignee: 孙海潮
Priority date: 2016-10-27
Filing date: 2016-10-27
Publication date: 2018-05-03

Abstract

A refrigerating heat pump type frost-free air conditioner comprises an outdoor unit housing (4), an evaporator (12), a fan (11), a middle partition plate (9), a compressor and frequency conversion electric control module space, a frequency conversion electric control box (5), and a compressor (6). An induced air way (10) is disposed at an air outlet of the fan (11). The induced air way (10) penetrates through the middle partition plate (9) to communicate with the compressor and frequency conversion electric control module space. An air collection hood (3) is disposed on the outdoor unit housing (4) of the compressor and frequency conversion electric control module space. The air collection hood (3) is connected to a heating air supply air-pipe (1). Air discharged by the fan enters the compressor and frequency conversion electric control module space through the induced air way (10), flows through the compressor (6) and the frequency conversion electric control box (5), then enters the air collection hood (3) and is conveyed to an air inlet side of the evaporator (12) through the heating air supply air-pipe (1), and flows out. The air conditioner has the characteristics: frost-free heating is implemented, heat dissipation and temperature reduction are performed on the compressor and a frequency conversion electric control module, the heating capacity is great, and the energy efficiency of the air conditioner is high.

Description

Refrigeration heat pump type frost-free air conditioner

Technical field

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.

Background technique

The existing refrigerating heat pump type air conditioner includes an indoor unit and an outdoor 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. 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. Regardless of the cooling or heating, 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. Generally, the 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. No matter 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. 2. 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. When the inverter electronic control module in the existing inverter air conditioner adopts air-cooling heat dissipation, the fan and heat exchanger parts are completely open to the outside of the outdoor unit, and the negative pressure region formed when the fan is running is large, and the air is blown into the entire heat exchanger. Surface, while the radiator only occupies a small part of it, and is located in the edge area of the fan blade with a small air intake, so the airflow through the radiator is small, the air cooling efficiency is very low, especially in summer, the ambient temperature is high. When the frequency conversion electronic control module is often poor in heat dissipation, it will easily cause the entire system to over-temperature protection and stop running when the high-temperature operation is performed for a long time. The long-term operation of the frequency conversion electronic control module will shorten the service life under such working conditions, and even burn out, and the refrigerant Cooling frequency conversion 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 form condensation on the surface of the frequency conversion electronic control module and the electronic control circuit board, thereby bringing the short circuit of the frequency conversion electronic control module circuit board. Hidden dangers. When the air conditioner heats up, condensation water will be generated on the surface of the evaporator tube. When the ambient air temperature is lower than 5-7 °C, the condensation water will condense into a thin frost. The lower the ambient temperature, the more serious the frosting will be, and even the thickness will be thick. 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 evaporative heat transfer capacity, and even cause the air conditioner to stop working and can not heat, so the defrost device must be defrost . The usual defrosting method for air conditioners is a 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. When the outdoor temperature is low, the compressor will be exposed to liquid shock, which will reduce the performance of the compressor and even damage the compressor. The defrosting effect of the electric heating components is good, and the first two kinds of interruption heating or reducing the heating situation do not occur, but the electric heating components are defrosted, the power consumption is large, and the defrosting cost is high. In addition, when to start defrosting is also a problem that is difficult to control accurately. 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.

Summary of the invention

1. The object of the present invention is to provide a refrigeration heat pump type frost-free air conditioner, which can prevent the outdoor unit evaporator from being frosted without increasing the power consumption after the air conditioner is started to ensure that the air conditioner is not interrupted and does not reduce the normal heating. As a frost-free air conditioner, it is difficult to accurately control the problem of starting the defrost time.

2, without increasing the power consumption, the outdoor unit evaporator can be supplied with air above 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.

3. Cooling and cooling the compressor and the variable frequency electronic control module, so that the compressor and the variable frequency electronic control module are always outside a better working condition, effectively improving the working efficiency of the compressor and the variable frequency electronic control module, thereby improving the air conditioning. Energy efficiency also ensures the normal service life of the compressor and variable frequency electronic control module.

The object of the present invention is achieved by the following methods: a refrigerating heat pump type frost-free air conditioner, 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: an air inlet duct is arranged at the air outlet of the fan, and the air inlet duct passes through the middle partition to communicate with the compressor and the frequency conversion electronic control module, and the outdoor unit in the space of the compressor and the frequency conversion electronic control module A collecting hood is arranged on the casing, and the collecting hood is connected with the heating air supply duct, and the fan outlet air enters the compressor and the frequency conversion electric control module space through the air inlet duct, flows through the compressor, and after the frequency conversion electric control box, enters the set. The wind hood is delivered by the heating air duct to the air inlet side of the evaporator.

The object of the present invention can also be achieved in such a manner: a refrigeration heat pump type frost-free air conditioner, including an outdoor unit casing, a condenser, a fan, a middle partition, a compressor and an inverter electronic control module space, and an inverter power supply The control box and the compressor are characterized in that: an air inlet duct is arranged at the air outlet of the fan, and the air inlet duct passes through the middle partition to communicate with the compressor and the frequency conversion electronic control module, and the side panel of the compressor and the outdoor unit casing A cooling air outlet duct is arranged between the cooling air outlet and the air outlet of the cooling air duct passing through the outdoor machine casing to communicate with the external space of the outdoor unit, and the fan air outlet enters the compressor and the frequency conversion electronic control module space through the air inlet air passage, and flows through the compression. After the machine is replaced by the frequency conversion electric control box, it enters the cooling air outlet duct and discharges the outdoor unit.

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.

According to the present invention, a cooling air duct partition is provided between the compressor and the side panel of the outdoor unit casing.

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. Machine, because the air discharged by the fan has a strong wind pressure, some of the air passes through the air inlet duct set by the fan air outlet, and is collected into the space of the compressor and the frequency conversion electronic control module, flowing through the compressor, and the frequency conversion electricity When the box is controlled, the heat of the compressor casing is absorbed, and the heat on the frequency conversion electric control box becomes hot air. At this time, the cooling air outlet damper is closed, and the collecting hood becomes the compressor and The only air outlet channel of the variable frequency electronic control module space, the hot air will be collected into the wind 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 to form a mixture. Air, the temperature of the mixed air is higher than the air outside the fan and 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 exchange fins and then exits the outdoor unit, the temperature The mixed air above ambient air temperature flows through the evaporation tube on the evaporator and the heat exchange fins evaporate heat exchange, which improves the evaporation efficiency of the evaporator and improves the heating capacity. At the same time, the above absorption compressor casing, the frequency conversion The heat on the electric control box becomes hot air, which acts as a heat sink for the compressor and the variable frequency electronic control module.

When the air conditioner is heating, condensation water will be generated on the surface of the evaporator tube. When the ambient air temperature is lower than 5-7 °C, the surface temperature of the evaporator tube sheet will be lower than 0 °C, and the condensation water will condense into a thin frost. When the air conditioner is heated at an ambient air temperature of less than 5-7 ° C, the above-mentioned air mixture temperature mixed with the air outside the fan and the evaporator space is greater than 0 ° C, thereby eliminating frost formation on the outdoor unit evaporator. It is possible that the air conditioner has no frost and heat and becomes a frost-free air conditioner. At this time, not only does the power supply to the interior not be interrupted or reduced, but also the evaporator is heated due to the temperature of the mixed air flowing above the ambient air temperature. The evaporation energy also increases the heating of the room; when the ambient temperature of the colder climate makes the temperature of the mixed air lower than 0 °C, the temperature of the mixed air is always higher than the ambient temperature, and the surface of the evaporator plate of the outdoor unit Although it will freeze and freeze in an environment below 0 °C, the rate of condensation and icing will be greatly reduced, thereby reducing the opening frequency and defrost time of the auxiliary defroster, saving energy and saving energy. 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. Regardless of whether the air conditioner is heated at an ambient temperature of less than 5-7 ° C or higher than 5-7 ° 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 outdoor unit is evaporated. The efficiency is improved, the heating energy efficiency is improved, and the energy saving is saved.

During air conditioning and cooling, the air outlet of the cooling air duct is opened, and the air damper of the air collecting hood is closed. Under the action of the outdoor unit fan, 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 only allowed to be at a temperature of 43 ° C under the maximum operating ambient temperature of the air conditioning condition, and the surface temperature of the compressor casing at this time will be Up to 100 °C, the temperature of the frequency conversion module in the frequency conversion electric control box will be close to the limit working temperature of the frequency conversion module of 75 °C. Therefore, the hot air temperature is still much lower than the temperature of the surface of the compressor casing and the frequency conversion electric control box, and is discharged by the fan. A part of the hot air passes through the air inlet duct set by the fan air outlet, and is collected into the space of the compressor and the variable electrical control module. When passing through the compressor and the frequency conversion electric control box, the heat of the compressor casing and the frequency conversion electric control box are changed. In the hotter hot air, when the collecting hood is closed, the cooling air duct becomes the only air outlet channel of the compressor and the variable frequency electric control module, and the hot air passes through. The cold air duct flows out of the outdoor unit to achieve the purpose of cooling and cooling the compressor and the variable frequency electric control box. The compressor and the variable frequency electric control box are cooled and cooled, so that the frequency conversion electronic control components on the compressor and the variable frequency electric control box are always Operating at a suitable temperature condition improves the performance and service life of compressors and variable frequency electronic components.

If 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 discharges the fan regardless of heating or cooling operation. A part of the air will pass through the air inlet duct set by the fan air outlet, and will be put into the space of the compressor and the frequency conversion electronic control module. After passing through the compressor, the frequency conversion electric control box will be discharged to the outdoor unit. In the event of a refrigerant leak, the leaked refrigerant is discharged to the outdoor unit at any time, thereby eliminating the risk of a leak in the outdoor unit of the flammable refrigerant system.

The air inlet duct of the invention passes through the middle partition plate and communicates with the compressor and the frequency conversion electronic control module, and can also be designed to bypass the middle partition plate and communicate with the compressor and the frequency conversion electronic control module, and there is no substantial difference between the two. The air hood is arranged on the outdoor unit casing of the compressor and the frequency conversion electronic control module space, and the wind hood can also be arranged in other parts of the space of the middle partition or the compressor and the frequency conversion electric control module, and the air can be passed through and collected. The heat transfer air duct connected to the hood is transported to the air inlet side of the evaporator for the substantial purpose.

The above invention aims to reduce the temperature of the compressor and the variable frequency electric control box and eliminate the leakage of the outdoor unit of the flammable refrigerant system, which may cause an explosion hazard. The object of the invention is to achieve the situation that the existing air conditioner does not need to increase energy consumption.

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. Usually, 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 tuyères. 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.

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. When cooling, 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 air collecting hood is disposed on the rear back panel of the outdoor unit casing far away from the air guiding duct, and the collecting hood air collecting opening is designed as large as possible, so that the flowing air is collected into the collecting hood without resistance, and the wind collecting body The cover and the air supply 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.

Since the above technical solution is adopted, the present invention has the following advantages and positive effects: 1. When the ambient temperature is low when the air conditioner is heated to a temperature at which the evaporator will generate frost and freeze, 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.

2. Regardless of the ambient temperature at which the air conditioner is heated, 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.

3. When the air conditioner is running, whether it is heating or cooling, 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.

4. When the invention is applied to the air conditioner of the flammable refrigerant system, the hidden danger of the explosion of the air conditioner outdoor unit may be eliminated, and the safe use of the air conditioner of the flammable refrigerant system is ensured.

5. The above-mentioned invention for the heat dissipation and cooling of the compressor and the variable frequency electric control box and the elimination of the leakage of the outdoor unit of the flammable refrigerant system may cause an explosion hazard. The object of the invention is to realize the realization of the existing air conditioner without increasing the energy consumption. , with zero cost to achieve the purpose of the advantage.

DRAWINGS

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.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

Figure 1, 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.

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. When 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. Wind pressure, which is arranged at the air inlet duct 10 of the air outlet of the fan 11, can introduce part of the chilled air 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 electric control box 5, The compressor 6 and the variable frequency electric control box 5 exchange heat, and absorb the heat accumulated on 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 wind collecting cover 3 and then heated. The air duct 1 is discharged to the air outlet 13 of the heating air duct, and the arrow on the air outlet 13 of the heating air duct represents the air outlet and the air outlet direction, and the heat of the air outlet 13 of the heating air duct is exhausted. The air merges with the air taken in from the outside of the outdoor unit to become mixed air. The temperature of the 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. Under the action of the fan 11, the mixed air is absorbed by the evaporator 12, and the mixed air is cooled and cooled. The mixed air is discharged from the outdoor unit by the fan 11, and the air is circulated in this way. When the temperature of the mixed air is low enough to suppress the tube frosting on the evaporator, 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. .

During cooling, 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. Although the temperature is increased to hot air, the temperature of the hot air is still lower than that of the compressor casing. And the temperature of the surface of the frequency conversion electric control box, the hot air is discharged by the fan 11 to the outside of the outdoor unit, and is disposed at the air inlet duct 10 of the air outlet of the fan 11, and introduces part of the hot air into the space of the compressor 6 and the frequency conversion electronic control module 5, and flows. When the compressor 6 and the frequency conversion electric control box 5 pass through, heat exchange with the compressor 6 and the variable frequency electric control box 5 is performed, and the heat accumulated on the compressor 6 and the variable frequency electric control box 5 is exhausted through the cooling air duct 7 to be discharged outside. In this way, the purpose of cooling and cooling of the compressor 6 and the variable frequency electric control box 5 is achieved.

The arrows in the drawing represent the direction of the inlet and outlet air and the direction of the incoming and outgoing air. The dotted arrow indicates the flow path of the hot air flowing out of the cooling air duct during cooling. The variable frequency electronic control module in the description of the embodiment is the variable frequency electric control box.

Claims

Refrigeration heat pump type frost-free air conditioner, including outdoor machine casing, evaporator, fan, middle partition, compressor and frequency conversion electronic control module space, frequency conversion electric control box, compressor, characterized in that: setting at the fan outlet Leading air duct, the air inlet duct passes through the middle partition and communicates with the compressor and the variable frequency electric control module space, and a wind collecting hood is arranged on the outdoor machine casing of the compressor and the frequency conversion electric control module space, and the collecting hood is connected The air is blown by the air duct, and the fan blows air into the compressor and the frequency conversion electric control module space through the air inlet duct, flows through the compressor, and after the frequency conversion electric control box, enters the wind collecting hood and is sent to the evaporator by the heating air duct. The inlet side flows out.
A refrigeration heat pump type frost-free air conditioner, comprising an outdoor unit casing, a condenser, a fan, a middle partition, a compressor and a frequency conversion electronic control module space, a frequency conversion electric control box, a compressor, and the feature is: setting at a fan outlet The air inlet duct passes through the middle partition and communicates with the compressor and the variable frequency electric control module space. A cooling air outlet duct is arranged between the compressor and the side panel of the outdoor unit casing, and the cooling air outlet is out. The tuyere passes through the outdoor unit casing and communicates with the external space of the outdoor unit. The fan outlet enters the space of the compressor and the variable frequency electric control module through the air inlet duct, flows through the compressor, converts the electric control box, and enters the cooling air outlet duct. The outdoor unit.
A refrigerating heat pump type frost-free air conditioner according to claim 1, wherein the air collecting hood and the heating air supply duct are made of an aluminum alloy.
A refrigerating heat pump type frost-free air conditioner according to claim 1, wherein an electric heating pipe is provided in the air collecting hood.
The refrigerating heat pump type frost-free air conditioner according to claim 1, wherein the air collecting hood tuyere is provided with a damper that can be opened and closed.
The refrigerating heat pump type frost-free air conditioner according to claim 2, wherein the cooling air outlet duct is provided with a damper that can be opened and closed.