CN1166588A

CN1166588A - Cleaning method of outdoor heat exchanger of air conditioner

Info

Publication number: CN1166588A
Application number: CN96105310A
Authority: CN
Inventors: 黄宏灿
Original assignee: XINDIAN AUTOMATION CO Ltd
Current assignee: XINDIAN AUTOMATION CO Ltd
Priority date: 1996-05-29
Filing date: 1996-05-29
Publication date: 1997-12-03
Anticipated expiration: 2016-05-29
Also published as: CN1071880C

Abstract

The cleaning method is that the fan in outdoor heat exchanger is made to rotate reversely for a certain period so that the reversed air flow is utilized to clean the dirt adhered to the fan. The fan is rotated alternately in front and reverse directions for certain periods, or it may be rotated reversely for a long period after the compressor is stopped to clean for a long period.

Description

A kind of method that cleans outdoor heat exchanger of air conditioner

The present invention relates to a kind of air conditioner, particularly a kind of self-cleaning device of outdoor heat exchanger of air conditioner.

It is indoor that the structure system of general air conditioner utilizes compressor to pump refrigerant circulation what.In the pipeline that is linked to be with outdoor heat converter, the variation of control refrigerant pressure and gas, liquid is dispelled the heat in indoor and outdoor heat converter position evaporation heat absorption and condensation respectively, blows over the hole of heat exchanger with the fan air blast, and the hot and cold band of gas is walked.Wherein, indoor heat converter has strainer filtering indoor circulation air by what, and therefore easily what keeps clean.But outdoor heat converter is then directly accepted the air-flow that fan is agitated, airborne dustiness can be attached to the one side of heat exchanger object gas flow, the absorption accumulation, the hole of blocking heat-exchanger gradually, reduce even completely lose heat exchange effect, therefore air conditioner must per one or two years or the shorter time promptly hire the professional to unpick and wash heat exchanger, quite bother.

The objective of the invention is to: design a kind of method that can the automated cleaning outdoor heat exchanger of air conditioner

Adopt following method to achieve these goals: make outdoor heat exchanger fan except that the forward running, make this fan antiport, utilize back draught to remove the dustiness that adheres on this heat exchanger of what in a suitable period.This fan is respectively with a preset period of time forward and reverse alternate-running; Or make the preset period of time antiport of this fan when the compressor of air conditioner stops back or light running, to keep the permanent cleaning of heat exchanger.

Adopt as above method, the back draught when utilizing the fan antiport is removed the dustiness that is attached on the heat exchanger, makes air conditioner keep good heat exchange effect, need not to remove the purpose that heat exchanger just can reach cleaning.

Fig. 1. the present invention is at the embodiment of air conditioner.

Fig. 2. a kind of circuit connecting relation in the embodiment of the invention.

General air conditioner 1 comprises on ectosome to be separated and mutually in abutting connection with (for example window type air conditioner) or separately

chamber interior

11 and 12 liang of parts of outdoor of (for example split type air conditioner); Chamber interior 11 is provided with heat exchanger 2, fan 3 and air channel 4 etc., and outdoor 12 is provided with members such as cold medium compressor 5 heat exchangers 6 and fan 7; Link to each other with pipeline between heat exchanger 2, cold medium compressor 5 and the heat exchange 6, refrigerant circulates therein, utilizes the variation of refrigerant pressure and gas, liquid, in outdoor heat converter 6 heat radiations, and in indoor heat converter 2 heat absorptions; And by

fan

7,3 this hot and cold is taken away with air-flow, this is the action principle of general air

conditioner.Heat exchanger

2 and 6 structure are that the pipeline that many parallel aluminium flakes are set in the refrigerant that unrolls forms the air-flow accessibke porosity outward, so that air-flow is taken away the hot and cold of pipeline.Effects such as resistance when passing hole by the what air-flow and static can make the micronic dust in the air-flow be adsorbed on gradually on the

wind surface

21,61 of heat exchanger, and wherein, indoor heat converter 2 has filter screen 9 filter chamber's inner circulating airs earlier by what, and therefore easily what keeps clean.But 6 of outdoor heat converters are directly accepted the air-flow that fan 7 is agitated, airborne dustiness can wind surface 61 attached to heat exchanger 6 on, the absorption accumulation, with the passing of time gradually the hole of blocking heat-exchanger 6, reduce even completely lose heat exchange effect, therefore general air conditioner must per one or two years or the shorter time promptly need unpick and wash heat exchanger.

Realize that method of the present invention is in air conditioner 1, be provided with a control device 8, this control device can adopt common control device to make outdoor heat exchanger fan 7 except that the forward running, make this fan 7 antiports in a suitable period, utilize back draught to remove the dustiness that adheres on this heat exchanger 6 of what, to keep the permanent cleaning of heat exchanger 6.For the purpose of indivedual controls, the motor 71 of outdoor fan 7 is independent with indoor fan motor 31, is controlled respectively by control device 8.That is control device 8 is according to the input signal of not shown user's interface and not shown temperature sensor etc., controls the running of compressor 5,

motor

31 and 71 in good time, provides required cold air output, the effect of the general air conditioner of this suitable what.Control device 8 among the present invention advances one

Step can make fan motor 71 reverse in good time, and this reverses and just transfers from one department to another with a preset period of time checker; Or only in shutting down a preset period of time of back (or load comparatively light time), compressor 5 reverses.Specifically, air conditioner is in the program of refrigeration, and compressor 5 turns round, and the heat of refrigerant must be leaned on fan 7 blow air in the outdoor heat converter 6, and the torrid zone is walked.By the direction that the turnover of suitable diaphragm 75 air-guidings is arranged between what heat exchanger 6 and the fan 7, therefore, remove when fan 7 is just changeing and air-flow can be pushed to heat exchanger 6, outside directions X is sent as shown; When fan 7 counter-rotatings, also can see through heat exchanger 6, Y direction suction air-flow produces thermolysis as shown, the dustiness that may accumulate on the former wind surface 61 of heat exchanger is inhaled to fall simultaneously.Therefore, need only the effect that reverse air-supply is arranged when reversing that is configured in of fan 7, so, control motor 71 counter-rotatings in good time and can reach demand.If fan 7 forward and reverse have identical air-supply efficient, so, but the control forward and backward checker of 8 pairs of motors 71 of control device, the time of forward and backward can be designed to identical or different ratio, for example replaces once every 1 hour; Or just changeing 1 hour, reversed 5 minutes; Or this start the time just changeing, and then reverses next time etc.Axial-flow type flabellum commonly used has the effect of reverse air-supply when reversing, but by the curved design of what flabellum, the efficient of may blowing during counter-rotating is lower, for avoiding influencing normal cold air efficiency, can utilize the dedusting effect of reversing of time of non-cold air operation, for example: use the air conditioner of general (non-frequency formula) compressor, its cold air operation control system suspends compressor when room temperature arrives demand, and the period conversion fan 7 that can utilize this compressor to stop to be counter-rotating; Just change and when compressor turns round once more, reply fan.To the air conditioner of what use inverter compressor, its cold air operation control system changes compressor rotary speed according to the size of the difference between current room temperature and demand, so can be in period conversion fan 7 counter-rotatings of compressor light load (than the slow-speed of revolution); Just change and when weight of compressor load (higher rotation speed), reply fan.In addition, also can the fan counter-rotating be stopped again, to remove dustiness after 3 minutes in a period of time after each air conditioner shuts down.To the structure of what control device 8, can select following related known techniques for use with fan motor 71:

(1) motor 71 uses and exchanges the permanent condenser type motor of phase-splitting, and the conversion of one of power supply end is connected convertible its forward and backward with stator main coil or secondary coil;

(2) motor 71 uses d.c. motor, and conversion two power inputs can make its forward and backward;

(3) motor 71 uses the three-phase alternating current motor, and any two power inputs of conversion can make its forward and backward;

(4) control device 8 contains timing circuit, sees through relay, according to the distribution of required time switching motor, with control motor forward and backward;

(5) control device 8 contains microprocessor, according to setting controlled condition, sees through relay, and the distribution of switching motor is with control motor forward and backward.

The composition that has shown a kind of embodiment among Fig. 2, wherein motor 71 has main coil M1 and contains three sections speed governing termination H for exchanging the permanent condenser type motor of phase-splitting, M, the secondary coil M2 of L, and composition such as capacitor C; Utilize a relay R L to be subjected to the control signal effect of a controller 8 outputs, the end of power supply AC is selected to be connected with main coil M1 or secondary coil M2, with its rotating of conversion.8 of controllers are a microprocessor circuit, utilize the control software that includes, and as described above, the machine output signal acts on the relay that other speed governing in relay R L and the air-conditioner is used in due course, with turning to and rotating speed of control motor 71.

Said motor is selected timing circuit and micro processor controls design for use, all can reach for being familiar with this type of technical staff, for the no longer detailed preface of prior art is stated.

Claims

1. method that cleans outdoor heat exchanger of air conditioner, it is characterized in that: in the air conditioner that possesses outdoor heat converter and fan, make fan except that the forward running, make this fan antiport, remove the dustiness that adheres on this heat exchanger of what to utilize back draught in a preset period of time.

2. method according to claim 1 is characterized in that: this fan can be respectively with a preset period of time forward and reverse alternate-running.

3. method according to claim 1 is characterized in that: the preset period of time antiport after this fan can shut down at the compressor of air conditioner.

4. method according to claim 1 is characterized in that: this fan is at the lighter period antiport of the compressor load of air conditioner.