CN202126056U

CN202126056U - Variable-frequency air conditioner

Info

Publication number: CN202126056U
Application number: CN2011202489565U
Authority: CN
Inventors: 张福华
Original assignee: TCL Air Conditioner Zhongshan Co Ltd
Current assignee: TCL Air Conditioner Zhongshan Co Ltd
Priority date: 2011-07-14
Filing date: 2011-07-14
Publication date: 2012-01-25
Anticipated expiration: 2021-07-14

Abstract

The utility model discloses a variable-frequency air conditioner, comprising a refrigeration system, a master control board and a variable-frequency drive board, wherein a vibration sensor is disposed on a compressor connection pipeline of the refrigeration system; the vibration sensor is connected with the input end of a single chip, the output end of the single chip is connected with the master control board, and the master control board is connected with the variable-frequency drive board; the single chip comprises an A/D (analogue/digital) conversion unit, an amplitude operation circuit, and a comparison circuit for comparing a real-time amplitude with a preset amplitude value. The variable-frequency air conditioner disclosed by the utility model controls the system to real-time monitor the vibration of the pipeline and automatically adjust the operation frequency of a compressor according to a rule set in advanced, so that the interference on a resonance frequency point by external factors is eliminated, an intelligent vibration reduction is realized, and the reliability of the variable-frequency air conditioner is enhanced.

Description

Transducer air conditioning

Technical field

The utility model relates to the air-conditioner technical field, more particularly, relates to a kind of transducer air conditioning.

Background technology

The refrigeration principle of convertible frequency air-conditioner is identical with the refrigeration principle of common air-conditioning, and major different is that the refrigerating capacity of air-conditioning can regulate as required, and the core component of regulating refrigerating capacity is a frequency-changeable compressor.When room temperature raise, thermic load increased, and with higher frequency run, cold medium flux increases frequency-changeable compressor under the driving of controller, and corresponding air conditioner refrigerating amount increases; When room temperature descended, thermic load reduced, and the operating frequency of frequency-changeable compressor descends, and cold medium flux reduces, and corresponding air conditioner refrigerating amount reduces.According to the variation of thermic load, the frequency of frequency-changeable compressor is circulation change between 20Hz～100Hz generally.

In the design of air-conditioning refrigeration system, the exhaust outlet of compressor, return-air mouth insert refrigeration system through copper pipe.When compressor operating, the driven by motor cam in the compressor rotates, and constantly carries out suction, compression, the discharge of gas, and in this process, compressor body can inevitably produce vibration, drives the copper pipe that is attached thereto simultaneously and vibrates.Excessive for fear of copper pipe amplitude in the process of vibration, because tired the fracture, and the excessive generation of amplitude is collided panel beating, other copper pipes and the extraordinary noise that produces; Particularly consistent and produce resonance for the vibration frequency of the intrinsic frequency that prevents copper pipe and compressor; Generally in the design of copper pipe, can adopt flexible design, reduce amplitude, will consider simultaneously increases corresponding counterweight on copper pipe; Change the intrinsic frequency of copper pipe, to avoid the vibration frequency of compressor.For fixed frequency air conditioner, as long as carry out suitable copper tube design, and, just can effectively avoid the resonant frequency of compressor through the suitable copper pipe counterweight of actual motion test selection, reduce the vibration of copper pipe; But for convertible frequency air-conditioner, because compressor has the frequency range of broad, in any case adjustment copper tube design and counterweight have component frequency to exist copper pipe resonance and amplitude excessive all the time.In order to overcome the above problems, in common convertible frequency air-conditioner design, current way is exactly through the actual motion test; Confirm in the frequency range of 20Hz～100Hz; Exist copper pipe resonance or amplitude excessive on which Frequency point, in automatically controlled design, these suspicious Frequency points carried out special processing then: because the frequency of compressor is a continually varying, these suspicious Frequency points not maskable, skip; Can only with speed faster through and can not cause the resonance of copper pipe; More than be feasible in practical application for the processing of resonant frequency point, also adopted, but also exist following problem by the overwhelming majority's air-conditioning producer:

Suspicious list of frequency is under the particular environment condition, to move the test back through model machine in advance to confirm; In the air-conditioning of reality uses; Environmental condition changes, do these Frequency points resonate? Whether is amplitude excessive? Is there there other Frequency point resonance? These problems be the control system can't know, also insurmountable.

Even under the particular environment condition, confirmed suspicious list of frequency; But owing to there is the difference of parts in process of production; Perhaps copper pipe distortion in transportation; Perhaps in use the copper pipe counterweight is aging comes off, and these all can cause the variation of copper pipe resonant frequency, and these problems also can't be foreseen and solve.

The utility model content

The technical problem that the utility model will solve is; Deficiency to above-mentioned prior art existence; A kind of transducer air conditioning that has real-time amplitude monitoring function is provided; Solve the compressor circuit of convertible frequency air-conditioner because the resonant frequency that unpredictable factor causes is inconsistent, and then produce the problem of vibrating major rupture, noise.

The technical scheme that the utility model adopts is; A kind of transducer air conditioning; Comprise refrigeration system, master control borad and frequency conversion drive plate, on the compressor connecting line of refrigeration system, be provided with vibrating sensor, said vibrating sensor connects the input of single-chip microcomputer; The output of single-chip microcomputer connects said master control borad, and master control borad connects the frequency conversion drive plate; Said single-chip microcomputer comprises A/D converting unit, amplitude computing circuit and the comparison circuit that real-time amplitude is compared with preset amplitude.

Preferably, said vibrating sensor is located on the blast pipe of compressor.

Preferably, said vibrating sensor is located on the muffler of compressor.

Preferably, said compressor connecting line is provided with balancing weight.

Preferably, said balancing weight is located at the downward bent part of compressor return air pipe.

Compared with prior art, the utlity model has following advantage:

One, can let the control system monitor the vibration of pipeline in real time, and, get rid of the interference of extraneous factor, realize intelligent vibration damping, improve the reliability of convertible frequency air-conditioner resonant frequency point by the automatic adjustment of the rule compressor operating frequency of setting in advance.

Two, on the compressor pipe arrangement, increase corresponding counterweight, change the intrinsic frequency of pipeline, to avoid the vibration frequency of compressor.

Description of drawings

Fig. 1 is the structural representation of the transducer air conditioning of the utility model.

The specific embodiment

Below pass through the specific embodiment, and combine accompanying drawing that the utility model is described further.

As shown in Figure 1; The transducer air conditioning of the utility model; Comprise refrigeration system, master control borad and frequency conversion drive plate, on the muffler 2 of the compressor 1 of refrigeration system or blast pipe, be provided with vibrating sensor 3, vibrating sensor 3 connects single-chip microcomputer through lead-in wire; Single-chip microcomputer connects master control borad, and master control borad connects the frequency conversion drive plate; Single-chip microcomputer comprises A/D converting unit, amplitude computing circuit and the comparison circuit that real-time amplitude is compared with preset amplitude.Downward bent part at compressor return air pipe 2 is provided with balancing weight 4.

The control method of the transducer air conditioning of the utility model is following: because vibrating sensor is fixed on the compressor return air pipe 2, and be connected with single-chip microcomputer through sensor lead.Therefore, when compressor 1 operation, the vibration of pipeline can pass to single-chip microcomputer in real time through sensor, and single-chip microcomputer is learnt the amplitude A of pipeline through A/D conversion and computing, and compares with the amplitude maximum A1 that presets.Be less than or equal to preset value A1 like real-time amplitude, then single-chip microcomputer sends for the control system and allows signal, and compressor can be with current frequency stabilization operation, the i.e. VFC of general mode; If amplitude is excessive, then single-chip microcomputer sends negative acknowledge character (NAK) for the control system, and compressor is fast through this Frequency point.The noise of having avoided compressor when the resonant frequency long-time running, to cause, even serious problems such as pipeline fracture.Convertible frequency air-conditioner can be adjusted the frequency of compressor at any time according to the variation of room thermic load when running well.General mode lower compression unit frequency pace of change is 1Hz/S; If the amplitude that electric-control system detects under the current frequency is excessive; Will adjust the frequency of compressor rapidly, and pass through, be equivalent to compressor and have only 0.25S the running time under current frequency with the speed of 4Hz/S; Shortened the time of compressor greatly, avoided serious vibration, noise problem in the resonant frequency operation.

Claims

1. transducer air conditioning; Comprise refrigeration system, master control borad and frequency conversion drive plate; It is characterized in that: on the compressor connecting line of refrigeration system, be provided with vibrating sensor; Said vibrating sensor connects the input of single-chip microcomputer, and the output of single-chip microcomputer connects said master control borad, and master control borad connects the frequency conversion drive plate; Said single-chip microcomputer comprises A/D converting unit, amplitude computing circuit and the comparison circuit that real-time amplitude is compared with preset amplitude.

2. transducer air conditioning according to claim 1 is characterized in that: said vibrating sensor is located on the blast pipe of compressor.

3. transducer air conditioning according to claim 1 is characterized in that: said vibrating sensor is located on the muffler of compressor.

4. according to claim 2 or 3 described transducer air conditionings, it is characterized in that: said compressor connecting line is provided with balancing weight.

5. transducer air conditioning according to claim 4 is characterized in that: said balancing weight is located at the downward bent part of compressor return air pipe.