CN201382520Y

CN201382520Y - Compressor protecting device for air conditioner in short of fluoride

Info

Publication number: CN201382520Y
Application number: CN200920145497U
Authority: CN
Inventors: 白韡; 应必业
Original assignee: Ningbo Aux Group Co Ltd
Current assignee: Aux Air Conditioning Co Ltd
Priority date: 2009-03-25
Filing date: 2009-03-25
Publication date: 2010-01-13
Anticipated expiration: 2019-03-25

Abstract

The utility model discloses a compressor protecting device used for an air conditioner in short of fluoride. The device includes an indoor environmental temperature sensor, a first temperature sensor arranged at an inlet of an evaporator of an air conditioner indoor unit, a second temperature sensor arranged at a middle coil pipe of the evaporator of the air conditioner indoor unit, and a control unit. The control unit includes a comparer, a timing unit and an actuator for cutting off the power supply of a compressor. When the temperature detected by the second temperature sensor detects is higher than or equal to the temperature 8 DEG C detected by the first temperature sensor, or the temperature detected by the indoor environmental temperature sensor is lower than or equal to the temperature 3 DEG C detected by the first temperature sensor, the timing unit is started for timing, and the actuator cuts off the power supply of the compressor after the timing lasts for 30 seconds. The utility model protects the air conditioner in short of fluoride through the difference value change of the temperature at the inlet of the evaporator, the temperature at the middle coil pipe of the evaporator, and the temperature of the indoor environment, thereby realizing the purposes of protecting the compressor of the air conditioner in short of fluoride with lower cost.

Description

Compressor protection device when being used for air conditioner lacks fluorine

Technical field

The utility model relates to a kind of air-conditioner, particularly relates to a kind of compressor protection device when being used for air conditioner lacks fluorine.

Background technology

Carry out analysis of experiments by the air-conditioner that the compressor that feeds back on the market is burnt, find to burn most ratio that accounted for owing to the compressor that the scarce fluorine of system causes, because, when air conditioner lacks fluorine reaches 30% when above, the motor winding temperature of compressor will surpass its design temperature, thereby cause life of winding sharply to descend, generally be no more than 2 years service life.

In order to overcome the problems referred to above, traditional air-conditioner has increased by a low-voltage protective switch at the air intake duct place of compressor of outdoor unit, is used for carrying out when pressure is lower than to a certain degree the scarce fluorine protection control of air-conditioner.But; owing to compressor air suction pressure can change along with the variation of environment temperature; therefore the operating pressure of pressure-head switch should not design too highly; prevent maloperation under low temperature environment; like this, only when air conditioner lacks fluorine is very serious, promptly under the low-down situation of pressure of inspiration(Pi); reach 80% and just can play the effect of protection when above such as lacking fluorine, and can't in time protect at the situation of scarce fluorine about 30%.In addition, because pressure-head switch is arranged on the outside, and controller is arranged on the indoor, therefore also needs to increase a control line, and the cost of pressure-head switch own is higher in addition, causes traditional scarce fluorine defencive function design cost higher.

The utility model content

Technical problem to be solved in the utility model is that the scarce fluorine protective device that solves air-conditioner can't in time be protected and the cost problem of higher.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted provides a kind of scarce fluorine protective device of air-conditioner, comprise the indoor environment temperature sensor, first temperature sensor, second temperature sensor and the control module that are fixedly installed on air conditioner room unit air inlet place, described first temperature sensor is fixedly installed on the import department of air conditioner room unit evaporimeter, is used to detect the evaporator temperature; Described second temperature sensor is fixedly installed on the middle part coil pipe of air conditioner room unit evaporimeter, is used to detect evaporimeter middle part coil temperature; Described control module is fixedly installed on air conditioner room unit inside, comprise comparator, timing unit and be used to cut off the executing agency of compressor power that the signal input part of described comparator is the signal output part of the interior environment temperature sensor of junction chamber, first temperature sensor and second temperature sensor respectively; When second sensor, 3 detected temperature during, start timing unit and pick up counting more than or equal to 8 ℃ of detected temperature of first sensor; When the detected temperature of indoor environment temperature sensor smaller or equal to 3 ℃ of the detected temperature of first sensor, start timing unit and pick up counting; When the timing unit timing time equaled 30 seconds, executing agency cut off compressor power.

On the basis of such scheme, described indoor environment temperature sensor, first temperature sensor and second temperature sensor transfer to comparator with the temperature that collects after compressor moves 5 minutes continuously.

The utility model; respectively increase a temperature sensor in indoor machine evaporation import department and evaporimeter middle part coil pipe; add the existing indoor environment temperature sensor of air-conditioner itself, the difference by evaporator temperature, evaporimeter middle part coil temperature and indoor environment temperature three changes the scarce fluorine protection of carrying out air-conditioner.Lacking under the situation of fluorine 30%～100%, make compressor out of service, protect effectively, and under the situation that lacks fluorine 0%～30%, can avoid maloperation, when having realized air conditioner lacks fluorine with lower cost to the protection of compressor.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is made detailed explanation.

As shown in Figure 1, the utility model comprises indoor environment temperature sensor 1, first temperature sensor 2, second temperature sensor 3 and the control module that is fixedly installed on air conditioner room unit air inlet place, described first temperature sensor 2 is fixedly installed on the import department of air conditioner room unit evaporimeter, is used to detect the evaporator temperature; Described second temperature sensor 3 is fixedly installed on the middle part coil pipe of air conditioner room unit evaporimeter, is used to detect evaporimeter middle part coil temperature; Described control module is fixedly installed on air conditioner room unit inside, comprise comparator, timing unit and be used to cut off the executing agency of compressor power that the signal input part of described comparator is the signal output part of the interior environment temperature sensor of junction chamber, first temperature sensor and second temperature sensor respectively.

The temperature that indoor environment temperature sensor 1, first temperature sensor 2 and second temperature sensor 3 begin to collect after compressor moves 5 minutes continuously transfers to comparator, when second sensor, 3 detected temperature during, start timing unit and pick up counting more than or equal to 8 ℃ of detected temperature of first sensor; When the detected temperature of indoor environment temperature sensor smaller or equal to 3 ℃ of the detected temperature of first sensor, start timing unit and pick up counting; When the timing unit timing time equaled 30 seconds, executing agency cut off compressor power.That is to say; when air-conditioner is opened the refrigerating operaton pattern; gather evaporator temperature, evaporimeter middle part coil temperature and indoor environment temperature at compressor when continuously operation began after 5 minutes, during any one condition, air-conditioner enters scarce fluorine guard mode below satisfying:

A) coil temperature-evaporator temperature 〉=8, evaporimeter middle part ℃, and continue 30 seconds;

B) indoor environment temperature-evaporator temperature≤3 ℃, and continue 30 seconds;

Lack the fluorine guard mode if air-conditioner enters, air-conditioner shows the corresponding failure code immediately, and compressor is out of service, and other parts running status is constant, continues operation as indoor motor.If air-conditioner re-powers, lack the cancellation of fluorine guard mode.

Adopted air-conditioner of the present utility model can reach following effect:

1, under the situation that lacks fluorine 30%～100%, air-conditioner can effectively be protected under refrigerating state, makes compressor out of service.

2, under the situation that lacks fluorine 0%～30%, air-conditioner can not enter under refrigerating state and lack the fluorine guard mode, avoids the mistake protection.

3, tradition lacks the fluorine defencive function need increase about 15 yuan of costs, and wherein pressure switch is 12 yuan, 3 yuan of indoor and outdoor signal connecting lines, and the utility model only need increase about 2.2 yuan of costs, 2 yuan of temperature sensors, 0.2 yuan of holder.

The utility model is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, all fall within the protection domain of the present utility model.

Claims

Compressor protection device when 1, being used for air conditioner lacks fluorine comprises the indoor environment temperature sensor that is fixedly installed on air conditioner room unit air inlet place;

It is characterized in that also comprising:

First temperature sensor is fixedly installed on the import department of air conditioner room unit evaporimeter, is used to detect the evaporator temperature;

Second temperature sensor is fixedly installed on the middle part coil pipe of air conditioner room unit evaporimeter, is used to detect evaporimeter middle part coil temperature;

Control module, be fixedly installed on air conditioner room unit inside, comprise comparator, timing unit and be used to cut off the executing agency of compressor power that the signal input part of described comparator is the signal output part of the interior environment temperature sensor of junction chamber, first temperature sensor and second temperature sensor respectively; When the detected temperature of second sensor during, start timing unit and pick up counting more than or equal to 8 ℃ of detected temperature of first sensor; When the detected temperature of indoor environment temperature sensor smaller or equal to 3 ℃ of the detected temperature of first sensor, start timing unit and pick up counting; When the timing unit timing time equaled 30 seconds, executing agency cut off compressor power.
2, the compressor protection device when being used for air conditioner lacks fluorine as claimed in claim 1, it is characterized in that described indoor environment temperature sensor, first temperature sensor and second temperature sensor compressor continuously operation after 5 minutes the temperature that collects is transferred to comparator.