CN201145378Y

CN201145378Y - Fan rotary speed control module of fixed frequency air conditioner

Info

Publication number: CN201145378Y
Application number: CNU2007201962610U
Authority: CN
Inventors: 尹守伟
Original assignee: TCL Corp
Current assignee: TCL Corp
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2008-11-05
Anticipated expiration: 2017-12-21

Abstract

The utility model provides a fan rotational speed control module of a constant frequency air conditioner, which comprises a power supply input end for providing full-voltage of the fan, a control chip, a temperature input unit for providing the obtained coolant temperature for the control chip, a jumper selector unit for selecting the adjustable range of the rotational speed of a motor in accordance with a plurality of groups of selectable data reserved in the control chip, a four-way valve detection unit for detecting the working mode of the air conditioning and a fan driving voltage output unit for transmitting the voltage to the fan in accordance with the processing results of the control chip. The model utility adjusts the rotational speed of an outside fan properly during the refrigeration process according to the actual temperature of the coolant, thereby consequently improving the frosting problem of an indoor evaporator under the state of the cryogenic refrigeration.

Description

The rotation speed of fan control module of fixed frequency air conditioner

Technical field

The utility model belongs to field of air conditioning, relates in particular to the module that the rotation speed of fan of fixed frequency air conditioner is controlled.

Background technology

Air-conditioner is common temperature-adjusting device, especially under hot environment in, use air-conditioner to freeze and become very general.Yet,, often also need to use air-conditioner freeze (for example, high-power machine room etc.) in the lower place of some environment temperature.Generally, when adopting the fixed frequency air conditioner refrigeration under the low ambient temperature, the indoor set of air-conditioning is easy to produce frosting, this is because for existing fixed frequency air conditioner, its off-premises station groundwork is to liking compressor, outer blower fan and cross valve (at air conditioner), this type of air-conditioning is directly controlled by indoor set output mains supply (220V), when the lower and indoor environment of outdoor environment temperature when higher, if freeze with existing fixed frequency air conditioner, because air-conditioning self-characteristic, outdoor heat exchange is carried out comparatively fully, and this can cause indoor machine evaporation to be easy to frosting, thereby has influence on the work effect of complete machine.

The utility model content

The purpose of this utility model is to provide a kind of rotation speed of fan control module of fixed frequency air conditioner, and it solves the indoor evaporator frosting problem that is caused when fixed frequency air conditioner freezes under low temperature condition.

The rotation speed of fan control module of the utility model fixed frequency air conditioner comprises power input, control chip that the blower fan full voltage is provided, obtain refrigerant temperature and offer control chip the temperature input block, select the wire jumper selected cell of motor speed adjustable extent, the cross valve detecting unit that detects the air-conditioning work pattern and the blower fan driving voltage output unit that voltage is flowed to blower fan according to the result of control chip according to many groups selecting data of reserving in the control chip.

Described temperature input block obtains refrigerant temperature by the temperature sensor of air-conditioning system.

Reserve 16 groups of selecting datas in the described control chip.

Described cross valve detecting unit detects the cooling and warming pattern of air-conditioning and the conversion between two kinds of patterns.

Described power input connects the 220V civil power.

Described control chip is MCU.

The rotation speed of fan control module of the utility model fixed frequency air conditioner can change the operational voltage value of outer blower fan according to the variations in temperature of refrigerant in the condenser, thereby regulate the rotating speed of outdoor fan, improve the defective of the easy frosting of indoor set, made the operating efficiency of air-conditioning system be improved.

Description of drawings

Fig. 1 is the circuit module schematic diagram of the utility model rotation speed of fan control module;

Fig. 2 is that the utility model rotation speed of fan control module is applied to the installation wiring schematic diagram in the air-conditioning;

Waveform schematic diagram when Fig. 3 is the utility model rotation speed of fan control module control blower voltage;

Fig. 4 is the blower motor effective voltage value of the utility model rotation speed of fan control module output and the mapping table of refrigerant temperature.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Shown in Fig. 1, rotation speed of fan control module 1 provided by the utility model comprises control chip 10 and the temperature input block 11 that is connected with control chip 10, wire jumper selected cell 12, power input 13, cross valve detecting unit 14, blower fan driving voltage output unit 15.Wherein, temperature input block 11 obtains the temperature of refrigerant and offers control chip 10 by the temperature sensor 2 (shown in Fig. 2) of air-conditioning system; Wire jumper selected cell 12 is used for changing the adjustable extent (having reserved many groups of alternative data at control chip 10) of motor speed; Power input 13 connects the power supply input (be civil power 220V, the full voltage of blower fan is provided) of outdoor fan motor; Cross valve detecting unit 14 is used to detect the air-conditioning work pattern, comprises the conversion between cooling and warming pattern and the two kinds of patterns, and testing result is input to control chip 10; The outdoor fan operating voltage of blower fan driving voltage output unit 15 output after overregulating with reach regulate outside the purpose of blower fan rotating speed, generally speaking, blower fan driving voltage output unit 15 is regulated motor speed by controllable silicon.

In conjunction with referring to shown in Fig. 2, Fig. 2 has disclosed the utility model rotation speed of fan control module 1 and has been applied to concrete installation wiring diagram in the air-conditioning system.After temperature sensor 2 detects the temperature of refrigerant, send control chip 10 to by temperature input block 11; Zero line input and outdoor fan input (being equivalent to live wire) are connected to power input 13, and the line voltage of 220V is provided for power input 13; Cross valve detecting unit 14 detects the state of cross valve by outside cross valve input; Cross valve status signal that the temperature signal that control chip 10 obtains according to temperature input block 11, cross valve detecting unit 14 obtain and wire jumper selected cell 12 selected wire jumper data (shown in figure 4) draw rational voltage data and flow to outdoor fan by blower fan driving voltage output unit 15 that (outdoor fan in the present embodiment comprises a blower fan electric capacity,), in the present embodiment, blower fan driving voltage output unit 15 is by zero line and two needed operating voltages of line output outdoor fan of live wire.

Below describe the principle and the process of the utility model rotation speed of fan control module 1 control rotation speed of fan in air-conditioning system in detail.

Emphasis is with reference to shown in the figure 3, under the refrigeration mode of air-conditioning (when the cross valve signal that detects input is 0, the expression system is in refrigerating state), after outdoor fan starts, will be by among Fig. 3 shown in the curve map, operation is 10 seconds under 220V voltage, 10 seconds out of service then, behind the several times, after the 50th second, enter continuous operation so repeatedly.After entering continuous operation, refrigerant temperature data (the variation of refrigerant temperature that control chip 10 will be brought according to temperature input block 11, also reflect variation of ambient temperature indirectly, so when refrigerant temperature rises, be that environment temperature rises), the voltage effective value that appropriate change blower fan driving voltage output unit 15 is exported is to reach the purpose of regulating the blower fan wind speed.Characteristic according to refrigeration system, present embodiment has provided the corresponding relation of one group of effective operational voltage value of blower motor and refrigerant temperature in Fig. 4, certainly, this is one group of selected preferable data of present embodiment, according to actual conditions, can also adjust data.

(when detecting the cross valve input signal is alternating current 220V, and the expression system is the state of heating) do not need to change the outdoor fan motor rotating speed, so power to outdoor fan motor by full voltage under the heating mode of air-conditioning.

If the present mode of operation of air-conditioning is to be transferred to when heating by refrigeration, then outdoor fan motor stops 2 seconds (system judges and handles the needed time), moves continuously with full voltage then.

Obviously, by above-mentioned control principle and process as can be known, the rotation speed of fan control module of the described fixed frequency air conditioner of present embodiment is according to refrigerant actual temperature (its reaction environment temperature), the rotating speed of blower fan outside in process of refrigerastion, suitably regulating, thus the problem of indoor evaporator frosting under the cryogenic refrigeration situation improved.

The above only is preferred embodiment of the present utility model, not in order to restriction the utility model, for example, data cited among Fig. 4 can be made adjustment according to actual conditions, wire jumper selected cell 12 selectable data areas can be provided with some groups (for example 16 groups) according to actual conditions, and control chip 10 can be the integrated circuit that CPU or MCU (microprocessing unit) etc. possess data-handling capacity.In sum, all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1, the rotation speed of fan control module of fixed frequency air conditioner, it comprises:

The power input of blower fan full voltage is provided;

It is characterized in that the rotation speed of fan control module of described fixed frequency air conditioner further comprises:

Control chip;

Obtain refrigerant temperature and offer the temperature input block of control chip;

Select the wire jumper selected cell of motor speed adjustable extent according to many groups selecting data of reserving in the control chip;

Detect the cross valve detecting unit of air-conditioning work pattern; And

Voltage is flowed to the blower fan driving voltage output unit of blower fan according to the result of control chip.

2, the rotation speed of fan control module of fixed frequency air conditioner according to claim 1 is characterized in that, described temperature input block obtains refrigerant temperature by the temperature sensor of air-conditioning system.

3, the rotation speed of fan control module of fixed frequency air conditioner according to claim 1 is characterized in that, reserves 16 groups of selecting datas in the described control chip.

4, the rotation speed of fan control module of fixed frequency air conditioner according to claim 1 is characterized in that, described cross valve detecting unit detects the cooling and warming pattern of air-conditioning and the conversion between two kinds of patterns.

5, the rotation speed of fan control module of fixed frequency air conditioner according to claim 1 is characterized in that, described power input connects the 220V civil power.

6, the rotation speed of fan control module of fixed frequency air conditioner according to claim 1 is characterized in that, described control chip is MCU.