CN201377469Y

CN201377469Y - Liquid spraying and noise reducing structure for centrifugal refrigeration compressor

Info

Publication number: CN201377469Y
Application number: CN200920042078U
Authority: CN
Inventors: 陈清
Original assignee: Mcquay Air Conditioning Refrigeration Suzhou Co Ltd
Current assignee: Mcquay Air Conditioning Refrigeration Suzhou Co Ltd
Priority date: 2009-04-03
Filing date: 2009-04-03
Publication date: 2010-01-06
Anticipated expiration: 2019-04-03

Abstract

The utility model provides a liquid spraying and noise reducing structure for a centrifugal refrigeration compressor, which is characterized in that the structure comprises a plurality of liquid spraying ports (1) and a refrigerant at the outlet of a condenser in an air-conditioning unit; the liquid spraying ports correspond to a working wheel (2) of the refrigeration compressor and are uniformly distributed in a circle at the circumference of the working wheel; and the liquid spraying direction of the liquid spraying ports meets the exhaust airflow direction of an exhaust passage port (3) on the working wheel of the compressor (2). By adopting the structure, the noise during the operation of the centrifugal refrigeration compressor is greatly reduced; and the efficiency of the air-conditioning unit can not be influenced; no additional power is needed, and low cost is realized.

Description

Centrifugal refigerating compressor hydrojet denoising structure

Technical field

The utility model relates to the hydrojet denoising structure in the centrifugal refigerating compressor of air-conditioning unit, the noise when this hydrojet denoising structure is used to reduce the centrifugal compressor operation.

Background technique

Noise when air-conditioning unit, particularly central air-conditioner move is bigger.Noise is a kind of severe contamination to surrounding environment, and noise has extremely bad influence near personnel greatly, if often be in this high-decibel environment, and people can become very irritable, irritability.For physical and mental health and the living environment of safeguarding people, we solve air-conditioning unit noise problem as early as possible an urgent demand.

The noise of air-conditioning unit operation is analyzed and is got up to be mainly derived from refrigeration compressor.Existing one-stage centrifugal formula refrigeration compressor mainly is made up of import capacity controlling gear (comprising entry guide vane etc.), active wheel rotor, Diffuser, volute casing, gear case assembly, motor, bearing etc.During compressor operating, refrigerant vapour sucks from sucking pipe, the entry guide vane of flowing through enters in the active wheel of rotation, because the high speed rotating of active wheel, blade promotes gas longshore current road and outwards flows from the center, finally when gas when come out in the blast air road junction of active wheel periphery, its pressure and absolute velocity have all improved.Then, high speed airflow flows in the Diffuser, because the Diffuser flow area enlarges gradually, the speed of gas can be converted into the pressure energy.At last, converge to volute casing again from the Diffuser effluent air, the speed of gas can further be converted into the pressure energy in volute casing, and the gas after pressure raises is discharged by outlet pipe, leads to condenser.

According to the knowledge of the applicant, the noise when many air-conditionings producer all once attempted taking various ways to reduce the operation of one-stage centrifugal formula refrigeration compressor, but all not good or influence the working efficiency of air-conditioning unit because of actual noise reduction, and not concrete realization.

Summary of the invention

The utility model provides a kind of centrifugal refigerating compressor hydrojet denoising structure of air-conditioning unit, its objective is the problem of noise reduction when solving the air-conditioning unit operation.

For achieving the above object, the technical solution adopted in the utility model is: a kind of centrifugal refigerating compressor hydrojet denoising structure, and the refrigeration agent that is connect the condensator outlet in the air-conditioning unit by several mouth sprays by the road constitutes; The active wheel periphery of the corresponding refrigeration compressor of described mouth spray is round evenly arranges, the exhaust airstream direction of the exhaust passage mouth on the hydrojet direction of mouth spray and the compressor operating wheel intersects.

Related content in above-mentioned two technological schemes is explained as follows:

1, in the such scheme, described each mouth spray is arranged corresponding to the periphery of active wheel and is got final product, its concrete preferred mode is: each mouth spray is arranged on the side plate of Diffuser of compressor, the passage that they are offered by side plate inside converges and is communicated with a pipe joint, and this pipe joint connects the refrigeration agent at the condensator outlet place in the described air-conditioning unit by pipeline.This spline structure is more compact.

Certainly, also can arrange an independently annular plate in the periphery of active wheel, lay mouth spray on it, the passage that each mouth spray is offered by annular plate inside converges and is communicated with a pipe joint, and this pipe joint connects the refrigeration agent at the condensator outlet place in the described air-conditioning unit by pipeline.

2, in the such scheme, for noise reduction better, do not have influence on the flow velocity and the pressure of air-flow of the exhaust passage mouth of active wheel as far as possible, the hydrojet direction of each mouth spray can be tilted laterally by active wheel, and the hydrojet direction of each mouth spray and the angle of substantially horizontal are 10 °～30 °, and the best is 20 °.

3, in the such scheme, described " mouth spray connects the refrigeration agent of the condensator outlet in the air-conditioning unit by the road " comprises following two kinds of situations: the one, mouth spray is directly connect condensator outlet in the air-conditioning unit by the road; The 2nd, on condenser, establish the interface that connects the hydrojet denoising structure altogether especially, the cryogenic high pressure liquid refrigerant that this interface pass-out is identical with condensator outlet is connected mouth spray by the road with this interface.

4, in the such scheme, described mouth spray can be arranged around the multi-turn shape that circumferentially is of active wheel, but also the individual pen shape is arranged.Its quantity is not limit, and does not need corresponding one by one with the exhaust passage mouth of active wheel.

Design concept of the present utility model is: analyze discovery through the claimant, the noise during the centrifugal refigerating compressor operation is all caused by volute casing and outlet pipe high speed air current flow.Therefore, the claimant designs especially, and at the location arrangements mouth spray of the exhaust passage of corresponding active wheel periphery mouth, the refrigeration agent of the cryogenic high pressure liquid state that the condenser in the air-conditioning unit is discharged is sprayed onto the exhaust passage Kou Chu of active wheel.At this moment, the refrigeration agent of cryogenic high pressure liquid state runs into high-temperature exhaust air, liquid refrigeration agent becomes vaporific, atomized refrigerant and exhaust are mixed into volute casing, outlet pipe, thereby sponge the acoustic energy of the high-frequency noise that the exhaust friction brought, it is the same reason that this and the weather that mist is arranged, the tucket of automobile can become overcast.

Because the gas pressure at the mouth place, active wheel periphery exhaust passage of compressor is dynamic pressure, the static pressure of gas is less, and the static pressure of the liquid refrigerant of failing in the condenser is much larger than the gas-static at exhaust passage mouth place, so the liquid refrigerant in the condenser can feed to active wheel periphery exhaust passage Kou Chu automatically, need not to add in addition power.

In the hydrojet noise reduction process, after the liquid refrigerants of ejection nebulizes, except that absorbing acoustic energy, also cooled off the temperature of exhaust, promptly from compressor air-discharging, removed a part of heat in advance, thereby increased the condensation efficiency of postorder condenser, thereby this hydrojet denoising structure can not impact to the efficient of air-conditioning unit.

The utility model beneficial effect compared with prior art is:

Application of the present utility model, the noise when greatly reducing the centrifugal refigerating compressor operation is a sub load or all equally quiet at full capacity no matter make the air-conditioning unit.And, can the efficient of air-conditioning unit not impacted, also need not to add in addition power, realization with low cost.

Description of drawings

Accompanying drawing 1 is the utility model structural representation;

Accompanying drawing 2 is the utility model Diffuser side plate and active wheel part perspective view;

Accompanying drawing 3 is for using whole air conditioner group system schematic representation of the present utility model.

In the above accompanying drawing: 1, mouth spray; 2, active wheel; 3, exhaust passage mouth; 4, Diffuser; 5, side plate; 6, pipe joint; 7, passage; 8, volute casing; 9, entry guide vane.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment: shown in accompanying drawing 1～3, a kind of centrifugal refigerating compressor hydrojet denoising structure, the refrigeration agent that connects the condensator outlet in the air-conditioning unit by the road by several mouth sprays 1 constitutes.Specifically, each mouth spray 1 is arranged on the side plate 5 of Diffuser 4 of compressor, they converge connection one pipe joint 6 by the passage 7 of side plate 5 inside, this pipe joint 6 stays interface by the spy that pipeline connects on the condenser in the air-conditioning unit, this spy stays interface to communicate with the condenser bottom, the refrigeration agent proterties of its discharge is identical with the refrigeration agent of condensator outlet, is all the cryogenic high pressure liquid refrigerant.

And importantly each mouth spray 1 is round corresponding to active wheel 2 peripheries of the corresponding refrigeration compressor of compressor and evenly arranges, the exhaust airstream direction of the exhaust passage mouth 3 on the hydrojet direction of mouth spray and the compressor operating wheel 2 is crossing.And the hydrojet direction of each mouth spray 1 is tilted laterally by active wheel 2, and the angle α of the hydrojet direction of each mouth spray 1 and substantially horizontal is 10 °～30 °, and the best is 20 °.

Specifically, pipe joint 6 can stay interface to communicate with the condenser spy through a valve by pipeline, by the break-make of control valve, can select whether to carry out the hydrojet noise reduction.

Used the whole air conditioner group system of present embodiment, as shown in Figure 3, the refrigeration agent of its hydrojet is the cryogenic high pressure liquid of being fetched by the condenser bottom, it is sprayed onto the active wheel exhaust passage Kou Chu of centrifugal compressor, atomizing after the high-temperature exhaust air that these liquid and compressor operating wheel are discharged meets, and be mixed into volute casing 8, outlet pipe with it, absorb the acoustic energy of high-temperature exhaust air because of the high-frequency noise of friction tape, and also the temperature of high-temperature exhaust air is reduced, the refrigeration agent of final high temperature exhaust and atomizing together drains in the condenser, circulates.Thereby promptly reduced noise, do not influenced the working efficiency of whole air-conditioning unit again.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1, a kind of centrifugal refigerating compressor hydrojet denoising structure is characterized in that: the refrigeration agent that is connect the condensator outlet in the air-conditioning unit by several mouth sprays (1) by the road constitutes; Active wheel (2) periphery of the corresponding refrigeration compressor of described mouth spray (1) is round evenly arranges, the exhaust airstream direction of the exhaust passage mouth (3) on the hydrojet direction of mouth spray and the compressor operating wheel (2) intersects.

2, according to the described centrifugal refigerating compressor hydrojet of claim 1 denoising structure, it is characterized in that: described each mouth spray (1) is arranged on the side plate (5) of Diffuser (4) of compressor, they converge by the inner passage (7) of side plate (5) and are communicated with a pipe joint (6), and this pipe joint (6) connects the refrigeration agent at the condensator outlet place in the described air-conditioning unit by pipeline.

3, centrifugal refigerating compressor hydrojet denoising structure according to claim 1, it is characterized in that: the hydrojet direction of described each mouth spray (1) is tilted laterally by active wheel (2), and the angle of hydrojet direction of each mouth spray (1) and substantially horizontal is 10 °～30 °.

4, centrifugal refigerating compressor hydrojet denoising structure according to claim 3 is characterized in that: the hydrojet direction of described each mouth spray (1) and the angle of substantially horizontal are 20 °.