CN201819316U - A fanless ultra-quiet split air conditioner - Google Patents

Abstract

A fanless super-low-noise split air-conditioner comprises an outdoor unit and an indoor unit. The outdoor unit is provided with an outdoor refrigerant loop, the indoor unit is provided with an indoor refrigerant loop connected with the outdoor refrigerant loop, a radiator of the indoor unit adopts an evaporating fin with a heating unit structure, the evaporating fin is mounted on an indoor unit case, and one end of the evaporating fin is connected with an air pipe of a piping while the other end of the evaporating fin is connected with a liquid pipe of the piping. The indoor unit adopts a heat exchanger of the evaporating fin with larger surface area, not only can realize sufficient heat exchange with air and complete refrigerating and heating functions, but also stops airflow noises as the indoor unit is not provided with a fan, realizes a super-low-noise effect, and is simpler in structure compared with an existing air-conditioner, and is particularly suitable for occasions with particularly strict requirements in terms of noise.

Description

A fanless ultra-quiet split air conditioner

technical field

The utility model relates to an air conditioner, in particular to an ultra-quiet air conditioner with an indoor unit without a fan and using a large-area evaporation sheet as a heat exchanger.

Background technique

With the gradual improvement of people's living standards, air conditioners have been widely used in people's daily life and modern office environments. Although the noise index of air-conditioning products is already lower than the national standard, the noise generated by the current air-conditioning machine is still too loud, which cannot meet the higher requirements of users. It is generally believed that the ambient noise of daily life should not be higher than 35dB, and the ambient noise of office work should not be higher than 45dB. But most of the current air conditioner products can not meet this standard. The running noise of the floor-to-ceiling cabinet in the air conditioner is obviously too loud. The noise of 2-horse cabinets is generally close to 50dB, and the noise of 3-horse and 5-horse cabinets is generally above 50dB, even close to 60dB.

The noise generated by air conditioners includes mechanical noise and airflow noise, among which airflow noise is the main noise, and it is also difficult to effectively control the noise. The noise emitted by the indoor unit of the air conditioner is mainly composed of air intake noise, fan noise (rotating noise and eddy current noise) and exhaust port noise.

Air intake noise includes intake cascade (front panel) noise and intake lip noise. Since the air flow into the centrifugal fan has not only the axial speed, but also the obvious tangential speed, that is, the intake air flow is a rotating air flow, and the existence of the cascade hinders the rotation of the intake air flow, thereby generating noise. After the intake air flow enters the centrifugal fan, it turns sharply to the radial direction of the fan, and the air intake lip separates the air flow, which increases the generation of noise.

Fan noise includes rotational noise and eddy current noise. Rotational noise is caused by the rotating blades periodically hitting air particles, causing air pressure pulsations; vortex noise is caused by the vortex of the surrounding gas when the fan blades are rotating. These vortices are caused by viscous force It is split into a series of discrete small eddies, and the vortex and vortex splitting disturb the air, forming a process of compression and thinning, resulting in high noise.

The noise at the air outlet includes the noise inside the air outlet and the noise outside the air outlet. The noise inside the air outlet is due to the airflow in the air outlet changing from upward to horizontal, resulting in severe eddy currents and eddy current noise; the noise outside the air outlet is due to the gas particles of the airflow ejected from the cabinet and the surrounding static or low-speed gas particles The vortex mixing collision occurs, which destroys the stable state of the atmosphere and disturbs it, thus generating a powerful jet noise.

The impact of air conditioner noise on the environment and the use of rooms has been paid attention to by everyone. Effectively reducing the noise of air conditioners and making the surrounding environment meet the required environmental standards is of great social significance to improving people's quality of life and creating a quiet living environment.

At present, the noise reduction levels of indoor units of various air conditioner manufacturers are comparable, and the traditional noise reduction technology has basically reached its limit. The noise reduction of some products is at the expense of performance indicators, and it does not actually solve the problem.

Contents of the invention

The purpose of this utility model is to provide a fanless ultra-quiet split-type air conditioner, which can overcome the shortcomings of traditional air conditioners such as high noise and inconspicuous heat exchange efficiency, and has a simpler structure and can achieve super-quiet effects, especially suitable for Where there are particularly strict noise requirements.

The utility model achieves the above-mentioned purpose through the following technical solutions:

A fanless ultra-quiet split air conditioner, comprising an outdoor unit with an outdoor refrigerant circuit and an indoor unit with an indoor refrigerant circuit connected to the outdoor refrigerant circuit, the radiator of the indoor unit adopts a radiator The evaporating sheet of the structure, the evaporating sheet is installed on the indoor cabinet, one end of the evaporating sheet is connected to the gas pipe of the piping, and the other end is connected to the liquid pipe of the piping.

The indoor case of the air conditioner and the bottom of the evaporator are provided with an arc-shaped water tank, and the bottom of the arc-shaped water tank is connected to a drain pipe.

The inlet and outlet of the evaporating sheet are connected with switch valves.

The outdoor unit includes a motor, a compressor, an axial fan, an electromagnetic four-way valve and its coil, a fan motor, a condenser pipe, a filter, a capillary, a one-way valve and a stop valve. The inlet side of the compressor in the outdoor unit is connected to the gas-liquid separator, and the outlet side is connected to the electromagnetic four-way valve. The electromagnetic four-way valve is connected to one end of the condensation pipe, and the other end is connected to the filter. The stop valve of the liquid pipe is connected to the liquid pipe of the piping, and then connected to one end of the evaporator of the indoor unit through this liquid pipe. The other end of the gas-liquid separator is connected to the electromagnetic four-way valve, and then connected to the gas pipe of the pipe through the stop valve of the air pipe, and then connected to the other end of the indoor evaporator through this pipe. In addition, the outdoor unit is provided with an axial flow fan capable of sucking in outdoor air and discharging the air after heat exchange with the condensing pipe to the outdoor.

The indoor unit includes evaporators, sinks, valves, control panels and drain pipes. An arc-shaped water tank is arranged on the indoor case and below the evaporator, and a drainpipe is installed at the bottom of the water tank. The inlet and outlet of the evaporator are connected with a valve, and connected with the piping through the valve. A control panel is arranged on the indoor case, and is connected to the terminal of the outdoor unit through a cable. The indoor unit does not have a fan with its motor and blades.

The outstanding advantages of the present utility model are:

1. The indoor unit has no fan and fan motor, which eliminates the generation of airflow noise; avoids the vibration noise caused by poor motor balance, uneven rotor clearance of the fan motor, and insufficient concentricity between the motor and fan shaft.

2. The evaporator adopts a large-area heat sink, which has the advantages of fast heat transfer and small thermal inertia. It can fully contact with the air and perform heat exchange, which improves the heat exchange efficiency, so it can improve the cooling and heating efficiency.

3. The change in the structure of the evaporator avoids the sharp whistling sound of the traditional air conditioner due to the large ventilation volume and the intake air blowing on the fins of the evaporator.

4. There is an arc-shaped water tank on the indoor cabinet and below the evaporating sheet, which is used to receive the water droplets flowing down from the evaporating sheet and discharge it through the drain pipe, which can prevent the occurrence of dripping water and reduce the requirement for the levelness of the air conditioner installation.

5. An on-off valve is installed at the air pipe interface of the evaporator, and the opening of the valve is adjusted according to the need, that is, the amount of circulating refrigerant in the evaporator is adjusted to adjust the cooling capacity or calorific value. If a certain evaporator is not required to work, the power consumption of the compressor can be reduced by closing the valve of the evaporator to save energy.

Description of drawings

Fig. 1 is a front view of the appearance structure of the fanless ultra-quiet split type air conditioner of the utility model.

Fig. 2 is a front sectional view of the indoor unit structure of the fanless ultra-quiet split air conditioner of the present invention.

Fig. 3 is a left sectional view of the indoor unit structure of the fanless ultra-quiet split type air conditioner of the present invention.

Fig. 4 is a structural schematic diagram of the refrigerant circuit and the outdoor unit of the fanless ultra-quiet split air conditioner of the present invention.

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

1 and 3, the fanless ultra-quiet split air conditioner includes an outdoor unit 1 with an outdoor refrigerant circuit and an indoor unit 2 with an indoor refrigerant circuit connected to the outdoor refrigerant circuit.

The fanless ultra-quiet split air conditioner has cooling and heating functions.

When cooling:

1. The adiabatic compression process is completed by the compressor 20 . The compressor 20 sucks the low-temperature and low-pressure gas refrigerant sent by the first group of evaporators 3 and the second group of evaporators 4, and becomes a high-temperature and high-pressure gas after being compressed.

2. The isothermal compression process is carried out in the condensation pipe 21 of the outdoor unit 2 . The high-temperature and high-pressure gas refrigerant compressed by the compressor 20 is cooled and completely liquefied in the condenser tube 21, and the refrigerant changes from gaseous state to liquid state. At this time, the refrigerant becomes a high-pressure normal-temperature liquid. This process transfers the heat absorbed inside to the outside.

3. The adiabatic expansion process is carried out in the capillary tube 23, throttling and reducing the pressure of the high-pressure and normal-temperature liquid refrigerant, so that the refrigerant becomes a low-temperature and low-pressure liquid state. This process is very short, and the refrigerant does not absorb heat from the outside world.

4. The isothermal expansion process is completed in the first group of evaporating sheets 3 and the second group of evaporating sheets 4 . The tube diameter and internal volume of the evaporating sheet are much larger than the capillary tube, and the pressure of the low-temperature and low-pressure liquid refrigerant suddenly decreases, causing it to evaporate rapidly and absorb heat from the room to become a low-temperature and low-pressure gas state. This process completes the task of absorbing heat in the room.

Refrigerant flow route during refrigeration work:

The refrigerant flows from the exhaust pipe of the compressor 20 of the outdoor unit 1 to the condenser pipe 21 through the electromagnetic four-way reversing valve 18, and then passes through the filter 22, the capillary tube 23, the one-way valve 24, the liquid valve 25 of the shut-off valve, and the pipeline. The liquid pipe 12 flows to the pipeline of the first group of evaporators 3 and the second group of evaporators 4 of the indoor unit 2, and is sent to The gas-liquid separator 19 flows back to the air return pipe of the compressor 20 at last.

When heating:

1. The heat exchanger of the indoor unit 2 is changed from an evaporating sheet to a condensing sheet to dissipate heat indoors. After the compressor runs for a few minutes, the surface temperature of the condensing sheet can reach 40°C-50°C, and the heat will be emitted to the room by radiation, convection and diversion, increasing the room temperature.

2. The heat exchanger of the outdoor unit 1 has changed from a condensation pipe to an evaporation pipe to absorb heat from the outside.

3. The electromagnetic four-way valve 18 changes the flow direction of the refrigerant, and converts the high-temperature and high-pressure gas discharged from the compressor 20 to flow indoors to achieve the purpose of indoor heating.

4. The working condition of the compressor and other components is consistent with that of refrigeration.

Changing the cooling and heating functions of the air conditioner can be accomplished through the electromagnetic four-way valve 18 . When using the air conditioner in winter, adjust the switch of the air conditioner to the "hot" position. At this time, the electromagnetic four-way valve is energized to change the flow direction of the refrigerant to the heating cycle.

The first valve 15 and the second valve 16 are installed at the inlet and outlet of the evaporator, and the opening of the valve can be adjusted according to the needs, that is, the size of the circulating refrigerant of the evaporator can be adjusted to adjust the cooling capacity or calorific value, and finally the indoor temperature can reach the set requirement . If a certain evaporator is not required to work, the power consumption of the compressor can be reduced by closing the valve of the evaporator to save energy.

Comparing Figure 2 and Figure 3, when the evaporator is cooling, if the indoor humidity is relatively high, the humid air will condense into water droplets on the evaporator, and the water droplets will fall along the evaporator to the first arc below under the action of gravity Water tank 7 and the second curved water tank 8, and flow to the outdoors by the drain pipe 14 at the bottom of the water tank.

Claims (3)

1. A fanless ultra-quiet split air conditioner, comprising an outdoor unit with an outdoor refrigerant circuit and an indoor unit with an indoor refrigerant circuit connected to the outdoor refrigerant circuit, characterized in that, The radiator of the indoor unit adopts an evaporating sheet with a radiator structure, and the evaporating sheet is installed on the indoor case, and one end of the evaporating sheet is connected to the air pipe of the piping, and the other end is connected to the liquid pipe of the piping. 2. The fanless ultra-quiet split-type air conditioner according to claim 1, wherein an arc-shaped water tank is arranged on the indoor case of the air-conditioner and under the evaporating sheet, and the bottom of the arc-shaped water tank is connected to a drain pipe. 3. The fanless ultra-quiet split-type air conditioner according to claim 1, wherein a switch valve is connected to the inlet and outlet of the evaporating sheet.

Images