CN114704885A - A dehumidifier with the function of detecting refrigerant leakage and its detection method - Google Patents

Abstract

The invention relates to a dehumidifier with a function of detecting refrigerant leakage and a detection method thereof.A temperature sensor is arranged on the surface of a compressor of the dehumidifier, the detection method of the refrigerant leakage of the dehumidifier is to detect the temperature of the surface of the compressor when the dehumidifier works, stop working and cool for a period of time when the temperature reaches a certain value, judge whether the sensor on the surface of the compressor works normally according to the cooling amplitude, and further detect whether the whole dehumidifier works normally enough and whether the fault of lack of fluorine exists by the same method.

Description

A dehumidifier with the function of detecting refrigerant leakage and its detection method

technical field

The invention relates to the technical field of dehumidifier equipment, in particular to a dehumidifier with a function of detecting refrigerant leakage and a detection method thereof.

Background technique

Dehumidifiers in the prior art are equipped with a variety of detection components, such as press current detection devices, refrigerant detection sensors, pressure sensors, etc. Although these detection devices can detect the state of the refrigerant, they are often used for dehumidifiers that move frequently and have relatively large volumes. Small machines and multiple sensors can cause the dehumidifier to move less flexibly. If there is a refrigerant leakage, it is easy to cause a fire. However, if only a few sensors are introduced for detection, false alarms are likely to occur, resulting in abnormal shutdown of the compressor, and the detection accuracy needs to be improved.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a dehumidifier and a corresponding refrigerant leakage detection method which can effectively prevent fire safety accidents caused by lack of fluorine.

In order to achieve the above purpose, the dehumidifier with the function of detecting refrigerant leakage designed by the present invention is provided with a temperature sensor on the surface of the compressor to monitor the temperature of the surface of the compressor in real time.

A further solution is that, according to the dehumidifier with the function of detecting refrigerant, a corresponding dehumidifier refrigerant leakage detection method is invented, and the temperature of the compressor surface is detected by a temperature sensor to determine whether the whole machine is deficient in fluorine, and implement it in time. Fluorine deficiency protection, the method includes the following detection steps:

Step 1. Start the dehumidifier, and the temperature sensor on the surface of the compressor continuously monitors the surface temperature of the compressor. When the surface temperature of the compressor is greater than 130°C and the duration is greater than 1 minute, the whole machine will stop and the whole machine will display high temperature protection;

Step 2. After stopping for 3 minutes, the compressor surface temperature sensor continuously monitors the compressor surface temperature, and further processes are as follows:

a. During the shutdown period, the surface temperature of the compressor continues to drop, and the cumulative drop in 3 minutes is more than 5 °C. It is judged that the compressor sensor is normal, the display of the whole machine returns to normal, and it is restarted; the surface temperature of the compressor T>130 °C is detected again, and the duration More than 1 minute; the whole machine stops running, showing a fluorine deficiency fault, and the surface temperature of the compressor is still not lower than 130 degrees Celsius after cooling, indicating that the cooling system is faulty, that is, a fluorine deficiency fault;

b. During the shutdown period, the surface temperature of the compressor continues to drop, and the accumulated drop in 3 minutes is more than 5 °C. It is judged that the compressor sensor is normal, and the display of the whole machine returns to normal. Start again; 1 minute; the whole machine resumes normal operation;

c. During the shutdown period, the surface temperature of the compressor does not change or the cumulative drop is less than 3 °C in 3 minutes; the shutdown time of the whole machine increases by 3 minutes; the cumulative 6 minutes, the surface temperature of the compressor drops > 5 °C, and the compressor sensor is judged to be normal; the whole machine is restored To logic b, if the surface temperature of the compressor remains unchanged or the cumulative drop of 3 degrees Celsius in 3 minutes, the specific situation cannot be judged temporarily, because it may be that the temperature is too high at the beginning and the stable cooling time is not enough, so an additional 3 minutes of cooling is needed. After judging that the whole machine is working normally, it will return to the logic b test;

d. During the shutdown period, the surface temperature of the compressor remains unchanged, and the cumulative drop is less than 3 °C in 3 minutes; the shutdown time of the whole machine increases by 3 minutes; the cumulative 6 minutes, the surface temperature of the compressor drops <5 °C, and the compressor sensor is determined to be faulty; shield the compressor Sensor, the lack of fluorine is judged by the difference between the evaporator and the ambient temperature; 5 minutes after the start of the whole machine, if the ambient temperature - the temperature of the evaporator is less than 3 ℃, it is judged that the system is lack of fluorine; When the compressor sensor fails, the surface temperature of the compressor cannot be used for judgment, and the difference between the evaporator temperature and the ambient temperature is used for judgment;

Step 3. The whole machine is powered off and restarted, the fault is cleared, the whole machine is running in the state before the lack of fluorine, and it is checked whether the whole machine is working normally.

The dehumidifier with the function of detecting refrigerant leakage and its detection method designed by the present invention firstly designs a dehumidifier with a temperature sensor on the surface of the compressor to record the surface temperature of the compressor, and then designs the detection method of the dehumidifier. The method is to first detect the temperature of the surface of the compressor when the dehumidifier is working, stop working when it reaches a certain value and cool down for a period of time, judge the internal state of the dehumidifier according to the degree of cooling, and further detect the dehumidifier in the same way. specific status.

Description of drawings

FIG. 1 is a flowchart of Embodiment 1. FIG.

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific embodiments, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

Example 1.

As shown in FIG. 1 , a dehumidifier with the function of detecting refrigerant leakage described in this embodiment includes a compressor, a heat exchanger, a fan, a water container, a casing and a controller. The surface of the compressor has a temperature sensor.

A method for detecting refrigerant leakage of a dehumidifier as described, detects the temperature of the compressor surface through a temperature sensor, determines whether the whole machine is deficient in fluorine, and implements fluorine deficiency protection in time, the method comprising the following detection steps:

Step 1. Start the dehumidifier, and the temperature sensor on the surface of the compressor continuously monitors the surface temperature of the compressor. When the surface temperature of the compressor is T > 130°C and the duration is greater than 1 minute, the whole machine will be shut down, and the whole machine will display high temperature protection. The purpose is to heat the temperature to the working limit of the dehumidifier, so that it exceeds 130 degrees Celsius, before starting the following constant time cooling steps;

Step 2. After stopping for 3 minutes, the compressor surface temperature sensor continuously monitors the compressor surface temperature, and further processes as follows:

a. During the shutdown period, the surface temperature of the compressor continued to drop, and the cumulative drop in 3 minutes was >5°C. It was judged that the compressor sensor was normal, the display of the whole machine returned to normal, and it was restarted; the surface temperature of the compressor was detected again T > 130°C, and the duration was More than 1 minute; the whole machine stops running, and the fluorine deficiency fault is displayed;

b. During the shutdown period, the surface temperature of the compressor continues to drop, and the accumulated drop in 3 minutes is more than 5 °C. It is judged that the compressor sensor is normal, and the display of the whole machine returns to normal. Start again; 1 minute; the whole machine resumes normal operation;

c. During the shutdown period, the surface temperature of the compressor does not change or the cumulative drop is less than 3 °C in 3 minutes; the shutdown time of the whole machine increases by 3 minutes; the cumulative 6 minutes, the surface temperature of the compressor drops > 5 °C, and the compressor sensor is judged to be normal; the whole machine is restored to logic b;

d. During the shutdown period, the surface temperature of the compressor remains unchanged, and the cumulative drop is less than 3 °C in 3 minutes; the shutdown time of the whole machine increases by 3 minutes; the cumulative 6 minutes, the surface temperature of the compressor drops <5 °C, and the compressor sensor is determined to be faulty; shield the compressor Sensor, the lack of fluorine is judged by the difference between the evaporator and the ambient temperature; 5 minutes after the whole machine is started, if the ambient temperature - the temperature of the evaporator is less than 3 ℃, it is judged that the system is lack of fluorine; the whole machine stops running, and the failure of lack of fluorine is displayed;

Step 3. The whole machine is powered off and restarted, the fault is cleared, and the whole machine runs in the state before the lack of fluorine. The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art , without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or modifications to equivalent embodiments of equivalent changes, as long as it does not depart from the technical solution content of the present invention, according to the technical solution of the present invention Substantially any brief modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims (2)

1. A dehumidifier with a function of detecting refrigerant leakage, comprising a compressor, a heat exchanger, a fan, a water container, a casing and a controller, wherein the surface of the compressor is provided with a temperature sensor. 2. A method for detecting refrigerant leakage of a dehumidifier as claimed in claim 1, wherein the temperature of the surface of the compressor is detected by a temperature sensor to determine whether the whole machine is deficient in fluorine, and a fluorine deficiency protection is implemented in time, the method comprising: The following detection steps: Step 1. Start the dehumidifier, and the temperature sensor on the surface of the compressor continuously monitors the surface temperature of the compressor. When the surface temperature of the compressor is T > 130°C and the duration is greater than 1 minute, the whole machine will be shut down, and the whole machine will display high temperature protection. The purpose is to heat the temperature to the working limit of the dehumidifier, so that it exceeds 130 degrees Celsius, before starting the following constant time cooling steps; Step 2. After stopping for 3 minutes, the compressor surface temperature sensor continuously monitors the compressor surface temperature, and further processes are as follows: a. During the shutdown period, the surface temperature of the compressor continues to drop, and the cumulative drop in 3 minutes is more than 5 °C. It is judged that the compressor sensor is normal, the display of the whole machine returns to normal, and it is restarted; the surface temperature of the compressor T>130 °C is detected again, and the duration More than 1 minute; the whole machine stops running, and the fluorine deficiency fault is displayed; b. During the shutdown period, the surface temperature of the compressor continues to drop, and the accumulated drop in 3 minutes is more than 5 °C. It is judged that the compressor sensor is normal, and the display of the whole machine returns to normal. Start again; 1 minute; the whole machine resumes normal operation; c. During the shutdown period, the surface temperature of the compressor does not change or the cumulative drop is less than 3 °C in 3 minutes; the shutdown time of the whole machine increases by 3 minutes; the cumulative 6 minutes, the surface temperature of the compressor drops > 5 °C, and the compressor sensor is judged to be normal; the whole machine is restored to logic b; d. During the shutdown period, the surface temperature of the compressor remains unchanged, and the cumulative drop is less than 3 °C in 3 minutes; the shutdown time of the whole machine increases by 3 minutes; the cumulative 6 minutes, the surface temperature of the compressor drops <5 °C, and the compressor sensor is determined to be faulty; shield the compressor Sensor, the lack of fluorine is judged by the difference between the evaporator and the ambient temperature; 5 minutes after the whole machine is started, if the ambient temperature - the temperature of the evaporator is less than 3 ℃, it is judged that the system is lack of fluorine; the whole machine stops running, and the failure of lack of fluorine is displayed; Step 3. The whole machine is powered off and restarted, the fault is cleared, and the whole machine runs in the state before the lack of fluorine.

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