CN219036901U

CN219036901U - Low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit

Info

Publication number: CN219036901U
Application number: CN202320053536.4U
Authority: CN
Inventors: 高敏
Original assignee: Weike Tianjin Co ltd
Current assignee: Weike Tianjin Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-05-16
Anticipated expiration: 2033-01-09

Abstract

The utility model provides a low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit, which comprises a compressor, a refrigerant pipeline system, an integrated sheet metal chassis and a stand column assembly, wherein the compressor is connected with the refrigerant pipeline system; the cold fin type condenser is installed at the rear portion of stand subassembly, and the place ahead of stand subassembly from the top down is equipped with machinery access panel and electric access panel in proper order. The utility model relates to a low-noise variable-frequency air-cooled heat pump direct-expansion outdoor unit, which adopts a fully-sealed full-direct-current variable-frequency electric cabinet, wherein the electric cabinet comprises a full-direct-current variable-frequency compressor, a direct-current brushless fan motor, a main control and other hardware, and realizes the integrated control of the whole unit.

Description

Low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit

Technical Field

The utility model belongs to the technical field of commercial central air conditioning equipment, and particularly relates to a low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit.

Background

In the field of medical purification, in particular to a small biological laboratory and a clean auxiliary room of a hospital, a chiller set with higher investment is basically not used due to limited investment, and a variable-frequency air-cooled heat pump direct expansion outdoor unit is used instead. Therefore, in the purification field, the frequency conversion air-cooled heat pump direct expansion unit is more common in use.

In general, the variable frequency air-cooled heat pump direct expansion outdoor unit only comprises a compressor, an outdoor side heat exchanger, an expansion valve and other units, and does not comprise an indoor side heat exchanger, so that the variable frequency air-cooled heat pump direct expansion outdoor unit is usually matched with an air processing unit. The indoor side heat exchanger is positioned in the air processing unit, and in the refrigeration process, the indoor side heat exchanger is equivalent to an evaporator, and the air is cooled and dehumidified in a mode of absorbing heat in the air flowing through the surface of the indoor side heat exchanger; in the heating process, the indoor side heat exchanger corresponds to a condenser, and heats air flowing through the surface of the indoor side heat exchanger in a mode of condensing and releasing heat of high-temperature high-pressure gas from the compressor. Thereby realizing the functions of refrigerating and heating.

The outdoor unit of the variable-frequency air-cooled heat pump directly expands does not need secondary heat exchange of the secondary refrigerant, and water system related equipment such as a water pipeline, a water pump, a buffer water tank and the like are not needed in installation, and the water storage of the water tank is not needed to be preheated or precooled in the use process, so that the outdoor unit is more convenient to install and use.

The air-frequency conversion air-cooled heat pump direct expansion outdoor unit has no secondary heat exchange similar to a water chilling unit, and the evaporator or the condenser directly exchanges heat with air entering a room, so that the efficiency is higher. Meanwhile, in response to the national double-carbon environment-friendly concept, the refrigerating or heating efficiency of the unit becomes an important consideration for building energy conservation.

When the air conditioning unit operates, most of the time operates in a partial load state, so that the operation evaluation of a single refrigerating or heating season cannot be considered, and the comprehensive annual evaluation of refrigerating and heating of the system is more comprehensively performed. Meanwhile, along with the landing of a part of new national standards, the energy efficiency evaluation of the air conditioning unit is also more and more strict and accurate, for example, in the unit air conditioning unit and the multi-connected air conditioning unit, the comprehensive annual evaluation of the air conditioning unit by adopting APF (annual performance factor) is required.

Based on the characteristic that the variable-frequency air-cooled heat pump unit can realize linear stepless frequency modulation based on the compressor, the rotating speed of the compressor can be flexibly controlled so as to control the circulation quantity of the refrigerant, stepless regulation of the refrigerating (heating) quantity of the unit is realized, partial load performance is fully optimized through proper structural design, and the unit has higher annual energy efficiency.

In general, an outdoor unit of an air conditioning unit is installed outside a clean room, and is often installed next to a wall for convenience. Because the comfortable occasion is usually sensitive to environmental noise, the unit has the characteristic of flexible use and installation, but the control requirement on the noise of the unit is also more severe. Therefore, noise control is particularly important in the running process of the unit, and both the unit performance and the noise are strictly controlled.

Disclosure of Invention

In view of this, the present utility model aims to provide a low-noise, quiet, stepless capacity-regulating, full-direct-current variable-frequency low-noise variable-frequency air-cooled heat pump direct-expansion outdoor unit.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a low noise frequency conversion air-cooled heat pump outdoor unit that directly expands, includes compressor, refrigerant pipe-line system, integral type panel beating chassis, stand subassembly, and the compressor is connected with refrigerant pipe-line system, and the stand subassembly sets up around integral type panel beating chassis, and compressor and refrigerant pipe-line system all set up in the inner space that integral type panel beating chassis and stand subassembly are constituteed, and axial fan installs at the top of stand subassembly;

the rear part of the upright post assembly is provided with an air cooling fin type condenser, and the front part of the upright post assembly is sequentially provided with a mechanical overhaul panel and an electrical overhaul panel from top to bottom.

Further, the stand column assembly comprises a front left stand column, a front right stand column and two rear stand columns, wherein the front left stand column and the front right stand column are arranged in front of the integrated sheet metal chassis, and the two rear stand columns are arranged at the rear of the integrated sheet metal chassis.

Further, the upright post assembly is provided with a sealed waterproof variable frequency electric cabinet, and the sealed waterproof variable frequency electric cabinet is arranged on the front left upright post and the front right upright post through an electric cabinet upper cross beam and an electric cabinet lower cross beam bolt.

Further, a condenser upper frame is arranged above the air-cooled fin type condenser, and the condenser upper frame is arranged between the air-cooled fin type condenser and the axial flow fan.

Further, the sealed waterproof variable frequency electric cabinet is arranged below the axial flow fan.

Further, the bottom of integral type panel beating chassis is equipped with wooden underframe.

Further, the compressor is a full direct current variable frequency high-rotation speed compressor, the rotation speed can be automatically regulated according to the actual requirement of a room, the rotation speed is automatically reduced after the room working condition is stable, when the room load requirement is increased, the rotation speed is timely increased to offset the increase of the room load, real on-demand output is realized, fluctuation of the room temperature is effectively controlled, and accordingly the full direct current variable frequency high-rotation speed compressor has more comfortable body feeling experience, and the problems that the constant frequency compressor can only balance the temperature suddenly high or low and the fluctuation amplitude is too large due to the fact that the room load is switched on or switched on are thoroughly avoided.

Further, the axial flow fan is a high-strength metal large-diameter vortex fan, and a motor of the axial flow fan is a direct current brushless motor. The brushless DC motor intelligently adjusts the rotating speed according to the suction pressure and the exhaust pressure of the refrigerating system. Therefore, under the partial load working condition, the fan does not need to run at full rotation speed any more, the noise of the fan is effectively weakened, and meanwhile, the problem of high energy consumption caused by always high rotation speed running of the fan is avoided, so that the supply and demand balance of the condensation air quantity is realized. Meanwhile, the intelligent speed regulation is realized according to the pressure of the refrigerant system, so that the refrigerant system is always in a dynamic and stable working state, and the potential safety hazard problem caused by pressure fluctuation of the system is avoided.

Further, the air-cooled fin type condenser is an air-cooled fin type condenser with an inner threaded copper pipe connected with a hydrophilic aluminum foil in series, and the inner threaded copper pipe and the windowed cross-flow type hydrophilic aluminum foil with special inner threads can fully strengthen heat exchange, so that the air-cooled fin type condenser has higher heat exchange efficiency.

Compared with the prior art, the low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit has the following beneficial effects:

1. the patent a low noise frequency conversion air-cooled heat pump directly expands off-premises station adopts full sealed full direct current frequency conversion electric cabinet, and the electric cabinet contains hardware such as full direct current frequency conversion compressor and brushless fan motor of direct current and master control, realizes the integrated control of complete machine.

2. The low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit adopts a high-pressure cavity full-direct-current variable-frequency compressor, has the characteristic of linearly adjustable rotating speed of 20-120hz, and effectively realizes linear stepless adjustment of refrigeration (heat).

3. The low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit has the characteristics of linear stepless regulation of a compressor, fully meets the performance requirements of partial load, has higher annual performance coefficient, and is more energy-saving to use.

4. The patent a low noise frequency conversion air-cooled heat pump directly expands off-premises station adopts high strength metal major diameter vortex fan cooperation in order direct current variable frequency brushless motor, especially reduces fan rotational speed by a wide margin under low load operating mode such as night, effectively reduces the unit noise when energy-conserving.

5. The patent a low noise frequency conversion air-cooled heat pump directly expands off-premises station adopts the air-cooled fin formula condenser of the hydrophilic aluminium foil of internal thread copper pipe cluster, and internal thread copper pipe and the hydrophilic aluminium foil of cross flow of windowing have higher heat transfer intensification coefficient, and heat exchange efficiency is higher.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is an explosion schematic diagram of a low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit according to an embodiment of the present utility model;

fig. 3 is an internal schematic diagram of a direct expansion outdoor unit of a low-noise variable-frequency air-cooled heat pump according to an embodiment of the present utility model.

Reference numerals illustrate:

1. an integrated sheet metal chassis; 2. front left side column; 3. front right side column; 4. a rear pillar; 5. an electric cabinet upper beam; 6. a lower cross beam of the electric cabinet; 7. sealed waterproof variable frequency electric cabinet; 8. an air-cooled fin condenser; 9. a condenser upper frame; 10. an axial flow fan; 11. a compressor; 12. a refrigerant pipe system; 13. a mechanical access panel; 14. an electrical access panel; 15. and (5) a wood underframe.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1, a low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit comprises a refrigerant pipeline system 12 including a compressor 11, wherein the refrigerant pipeline system is placed in an inner space surrounded by a front left side upright post 2, a front right side upright post 3, a rear upright post 4, an air-cooled fin type condenser 8 and an integrated sheet metal chassis 1, so that electromagnetic and mechanical noise generated by the compressor in high-rotation-speed operation is effectively isolated, and operation comfort is ensured.

As shown in FIG. 1, the compressor 11 is a full DC variable frequency high-rotation speed compressor, which can automatically adjust the rotation speed according to the actual demands of a room, automatically reduce the rotation speed after the working conditions of the room are stable, and timely increase the rotation speed to offset the increase of the load of the room when the load demand of the room increases, thereby realizing real on-demand output, effectively controlling the fluctuation of the room temperature, having more comfortable body feeling experience, and thoroughly avoiding the problems of sudden temperature and low fluctuation and too large fluctuation amplitude caused by that the constant frequency compressor can only balance the load of the room through on or off.

Meanwhile, especially under the partial load working condition, the compressor can operate at a variable rotating speed intelligently, so that the whole machine has a higher performance coefficient. The fully optimized partial load characteristic can also ensure more excellent noise performance of the unit under the working condition with smaller load demand at night.

As shown in fig. 1, in the outdoor unit of the low-noise variable-frequency air-cooled heat pump, the axial flow fan 10 is a high-strength metal large-diameter scroll fan, and the motor is a dc brushless motor. The brushless DC motor intelligently adjusts the rotating speed according to the suction pressure and the exhaust pressure of the refrigerating system. Therefore, under the partial load working condition, the fan does not need to run at full rotation speed any more, the noise of the fan is effectively weakened, and meanwhile, the problem of high energy consumption caused by always high rotation speed running of the fan is avoided, so that the supply and demand balance of the condensation air quantity is realized. Meanwhile, the intelligent speed regulation is realized according to the pressure of the refrigerant system, so that the refrigerant system is always in a dynamic and stable working state, and the potential safety hazard problem caused by pressure fluctuation of the system is avoided.

As shown in FIG. 1, the air-cooled finned condenser 8 of the low-noise variable-frequency air-cooled heat pump is an air-cooled finned condenser with an inner threaded copper pipe connected with a hydrophilic aluminum foil in series, and the inner threaded copper pipe with a special inner spiral line and the windowed cross-flow hydrophilic aluminum foil can fully strengthen heat exchange, so that the heat exchange efficiency is higher.

As shown in fig. 2, after the mechanical access panel 13 and the electrical access panel 14 are installed, the whole unit presents a sealed box structure, the compressor refrigerant system which is easy to generate noise is isolated inside the unit by metal plates, and the sealed metal plate enclosure structure has the double functions of beauty and noise reduction.

As shown in fig. 3, an outdoor unit of a low-noise variable-frequency air-cooled heat pump is provided, on the basis of a wooden base frame 15, with an integral sheet metal chassis 1 sequentially mounted thereon, a front left side upright post 2, a front right side upright post 3, a rear upright post 4 mounted around the sheet metal chassis, and a direct-current brushless axial-flow fan 10 mounted on the upper portion thereof. The structure adopts the interlocking mode of bolt connection.

As shown in fig. 3, in the outdoor unit of the low-noise variable-frequency air-cooled heat pump, a sealed waterproof variable-frequency electric cabinet 7 is fixed through an electric cabinet upper cross beam 5 and an electric cabinet lower cross beam 6, the upper cross beam and the lower cross beam are fixed with a front left upright post 2 and a front right upright post 3, and a bolt connection interlocking mode is adopted between structural members.

As shown in fig. 3, the sealed waterproof variable frequency electric cabinet 7 is installed at a position below the direct current brushless axial flow fan 10, which is closer to the direct current brushless axial flow fan 10, so that the waterproof electric cabinet 7 arranged in the air duct can fully dissipate heat by means of air flow when the air-cooled fin type condenser 8 dissipates heat, the electric cabinet heat dissipation problem in high-temperature weather is effectively relieved, and the reliability is ensured.

As shown in fig. 3, the sealed waterproof variable frequency electric cabinet 7 integrates all control functions of the full direct current variable frequency compressor 11, the direct current brushless axial flow fan 10 and the whole refrigerating system, has multiple functions of waterproof, heat dissipation and electromagnetic isolation, and ensures stable and reliable operation of the multiple frequency converters.

The embodiment of the low-noise variable-frequency air-cooled heat pump direct expansion outdoor unit adopts a full direct-current variable-frequency compressor, a direct-current brushless axial-flow fan, a high-efficiency air-cooled fin type condenser and a series of intelligent variable-frequency control systems. The full-frequency intelligent control can fully adapt to the operation characteristics of partial load, so that the APF is higher, the full-frequency intelligent control is more energy-saving in annual use, the operation cost is fully saved, and the carbon emission is reduced; the supply and demand balance can be required to fully reduce the temperature fluctuation of a room, reduce invalid adjustment and greatly improve the use comfort; the optimized structural design with the silencing function can ensure that the unit has more excellent noise performance during operation.

Claims

1. The utility model provides a low noise frequency conversion air-cooled heat pump outdoor unit that directly expands which characterized in that: the axial flow fan is arranged at the top of the upright post component, and the axial flow fan is arranged at the bottom of the upright post component;

the rear part of the upright post component is provided with an air-cooled fin type condenser (8), and the front part of the upright post component is sequentially provided with a mechanical overhaul panel (13) and an electrical overhaul panel (14) from top to bottom.

2. The outdoor unit of claim 1, wherein: the stand column assembly comprises a front left stand column (2), a front right stand column (3) and two rear stand columns (4), wherein the front left stand column (2) and the front right stand column (3) are arranged in front of the integrated sheet metal chassis (1), and the two rear stand columns (4) are arranged behind the integrated sheet metal chassis (1).

3. The outdoor unit of claim 2, wherein: the upright post assembly is provided with a sealed waterproof variable frequency electric cabinet (7), and the sealed waterproof variable frequency electric cabinet (7) is mounted on the front left upright post (2) and the front right upright post (3) through an electric cabinet upper cross beam (5) and an electric cabinet lower cross beam (6) through bolts.

4. The outdoor unit of claim 3, wherein: the sealed waterproof variable frequency electric cabinet (7) is arranged below the axial flow fan.

5. The outdoor unit of claim 1, wherein: the bottom of the integrated sheet metal chassis (1) is provided with a wood bottom frame (15).

6. The outdoor unit of claim 1, wherein: the compressor (11) is a full direct current variable frequency high-rotation speed compressor (11).

7. The outdoor unit of claim 1, wherein: the axial flow fan (10) is a high-strength metal large-diameter vortex fan.

8. The outdoor unit of claim 1, wherein: the air-cooled fin type condenser (8) is an air-cooled fin type condenser with an inner threaded copper pipe connected with a hydrophilic aluminum foil in series.

9. The outdoor unit of claim 1, wherein: the upper part of the air-cooled finned condenser (8) is provided with a condenser upper frame (9), and the condenser upper frame (9) is arranged between the air-cooled finned condenser (8) and the axial flow fan.