Bueno comencemos.
La Mirilla (también llamada
Visor), es un dispositivo auxiliar en los sistemas de Aire Acondicionado y
Refrigeración que nos permite observar la condición del refrigerante en el
lugar de su ubicación. Es un indicador de la condición del refrigerante cuyas funciones
son determinar su estado líquido y su contenido de humedad.
Son conocidos los estragos que la
humedad puede causar en los sistemas de Refrigeración y Aire Acondicionado. La
humedad puede entrar a ambos sistemas por una pequeña abertura, rotura, prácticas
inadecuadas de servicio, llevadas por el aceite o el refrigerante, entre otras.
El refrigerante transporta la
humedad hasta que llega a la válvula de expansión donde experimenta una caída
de presión, si ésta decrece a un valor que corresponda a la solidificación del
agua (a menos de cero grados Celsius), se convierte en cristales de hielo,
presentándose así el congelamiento del agua en la válvula, restringiendo el
flujo de refrigerante y causando la reducción parcial ó total del enfriamiento
del sistema. Esta restricción causa que actúe el control de baja presión, o el
control de sobrecarga, apagando al compresor. Cuando el compresor no opera, el
hielo en la válvula se derrite y ocasiona ciclos de arranque y paros del
compresor, los cuales causan un daño ya conocido.
Aunque en la válvula de expansión
no ocurriera el congelamiento del agua, en el sistema se producen ácidos,
sedimentos, oxidación y corrosión, debidos a la mezcla de vapor de agua, calor
excesivo, aceite y refrigerante, mismos que dañaran seria-mente al sistema de
enfriamiento.
Cuando la humedad, el
refrigerante y el calor están presentes, sin duda alguna, hay acidez en el
sistema. El calor (o la temperatura), es el catalizador en la reacción química,
entre mayor sea la temperatura, la reacción es más rápida y de mayor
proporción. (La reacción química es directamente proporcional a la
temperatura).
El Indicador de Líquido se aplica
en los casos en que nos permite la visibilidad del refrigerante en estado
líquido, entre sus usos tenemos los siguientes:
– En medio de la válvula de
expansión y la unidad condensadora, nos provee de una indicación de la carga de
refrigerante del sistema.
– Después del separador de
aceite, nos permite observar y así asegurar el adecuado retorno de aceite al
compresor.
– Indica el aceite retornando al
compresor en la línea de succión.
Entre sus usos más importante del
Indicador de Líquido (llamado comúnmente “Mirilla” ó “Visor”) es el de
proporcionarnos una indicación visual de que la carga de refrigerante del
sistema es correcta:
Si el indicador de Líquido se
ubica en el recibidor cerca de la Unidad Condensadora si existe burbujeo en
ella, se determinará que el sistema no tiene suficiente carga de refrigerante.
Sin embargo, durante arranques con
grandes cargas térmicas del sistema, puede ocurrir burbujeo temporal en el indicador
de líquido. Si el tubo de salida del recibidor presenta obstrucción o es
pequeño, la situación del burbujeo ocurrirá la mayor parte del tiempo, aún con
la carga correcta de refrigerante del sistema, esta situación es necesario
observarla con cuidado para no llegar a la conclusión errónea de que el sistema
está bajo de carga.
Si a la Válvula Termostática (TXV) no le llega
refrigerante 100% líquido, nunca proveerá la capacidad total requerida, y el
sistema trabajará mucho más tiempo para poder lograrla. Por lo tanto el
Indicador de Líquido deberá colocarse lo más cercano a la TXV Fig. 2, para que
las burbujas se vean en el caso de existir, sino se coloca así, no se puede
saber lo que pasa entre el Indicador de Líquido y la TXV. Si no se tienen
burbujas a la salida del recibidor, es posible que se tengan burbujas en la
TXV.
Bueno amigos eso fue todo, espero que les haya gustado.
Already he had a long time without posting on the blog and I walked for a while eh busy for exams, term papers, etc. But anyway since I'm back and want to talk about the peephole
Good start.
The window (also called the Viewer) is an auxiliary device in the systems of Air Conditioning and Refrigeration allowing us to observe the condition of the refrigerant in the place of its location. It is an indicator of the condition of the refrigerant whose functions are to determine its liquid state and its moisture content.
They are known the ravages moisture can cause systems Refrigeration and Air Conditioning. Moisture can enter both systems through a small opening, break, inadequate service practices, led by oil or coolant, among others.
The refrigerant transports moisture until it reaches the expansion valve where it undergoes a pressure drop if it decreases to a value that corresponds to the solidification of water (less than zero degrees Celsius), it becomes ice crystals, presenting and freezing of water in the valve restricting the flow of refrigerant and causing total or partial reduction of the cooling system. This restriction causes acting low pressure control, overload control or turning off the compressor. When the compressor is not operating, the valve ice melts and causes startup cycles and stops the compressor, which cause harm already known.
Although the expansion valve no freezing of water occurs in the system acids, sediments, oxidation and corrosion occur, due to the mixture of steam, excessive heat oil and refrigerant, which will damage them seriously mind system- cooling.
When humidity, cooling and heat are present, undoubtedly there acidity in the system. The heat (or temperature), is the catalyst in the chemical reaction, the higher the temperature, the reaction is faster and greater proportion. (The chemical reaction is directly proportional to temperature).
The indicator liquid is applied in cases that allows the visibility of the liquid refrigerant, between uses include the following:
- Amid the expansion valve and the condensing unit, it provides us with an indication of the system refrigerant charge.
- After the oil separator, it allows us to observe and ensure proper oil return to the compressor.
- Indicates returning to the compressor in the oil suction line.
Among its most important uses of the indicator liquid (commonly called "peephole" or "Viewer") it is to provide a visual indication that the system refrigerant charge is correct:
If the indicator fluid is located in the lobby near the condensing unit if there bubbling in it it will be determined that the system is low refrigerant charge. However, during start-ups with high thermal loads of the system, it may be temporary bubble in the liquid indicator. If the receiver outlet tube obstruction or small presents, the situation bubbling happen most of the time, even with the correct refrigerant charge of the system, this situation is necessary to observe carefully not reach the erroneous conclusion that the system is under load.
If the thermostatic valve (TXV) will not reach 100% liquid coolant, never provide the required total capacity, and the system will work much longer to achieve. Therefore the indicator liquid should be placed as close to the TXV Fig. 2, to see the bubbles exist in the case, but is placed well, you can not know what happens between the liquid and the indicator TXV. Failure bubbles out of the hall, it may have bubbles in the TXV.
Well folks that's all, I hope you liked it.
Already he had a long time without posting on the blog and I walked for a while eh busy for exams, term papers, etc. But anyway since I'm back and want to talk about the peephole
Good start.
The window (also called the Viewer) is an auxiliary device in the systems of Air Conditioning and Refrigeration allowing us to observe the condition of the refrigerant in the place of its location. It is an indicator of the condition of the refrigerant whose functions are to determine its liquid state and its moisture content.
They are known the ravages moisture can cause systems Refrigeration and Air Conditioning. Moisture can enter both systems through a small opening, break, inadequate service practices, led by oil or coolant, among others.
The refrigerant transports moisture until it reaches the expansion valve where it undergoes a pressure drop if it decreases to a value that corresponds to the solidification of water (less than zero degrees Celsius), it becomes ice crystals, presenting and freezing of water in the valve restricting the flow of refrigerant and causing total or partial reduction of the cooling system. This restriction causes acting low pressure control, overload control or turning off the compressor. When the compressor is not operating, the valve ice melts and causes startup cycles and stops the compressor, which cause harm already known.
Although the expansion valve no freezing of water occurs in the system acids, sediments, oxidation and corrosion occur, due to the mixture of steam, excessive heat oil and refrigerant, which will damage them seriously mind system- cooling.
When humidity, cooling and heat are present, undoubtedly there acidity in the system. The heat (or temperature), is the catalyst in the chemical reaction, the higher the temperature, the reaction is faster and greater proportion. (The chemical reaction is directly proportional to temperature).
The indicator liquid is applied in cases that allows the visibility of the liquid refrigerant, between uses include the following:
- Amid the expansion valve and the condensing unit, it provides us with an indication of the system refrigerant charge.
- After the oil separator, it allows us to observe and ensure proper oil return to the compressor.
- Indicates returning to the compressor in the oil suction line.
Among its most important uses of the indicator liquid (commonly called "peephole" or "Viewer") it is to provide a visual indication that the system refrigerant charge is correct:
If the indicator fluid is located in the lobby near the condensing unit if there bubbling in it it will be determined that the system is low refrigerant charge. However, during start-ups with high thermal loads of the system, it may be temporary bubble in the liquid indicator. If the receiver outlet tube obstruction or small presents, the situation bubbling happen most of the time, even with the correct refrigerant charge of the system, this situation is necessary to observe carefully not reach the erroneous conclusion that the system is under load.
If the thermostatic valve (TXV) will not reach 100% liquid coolant, never provide the required total capacity, and the system will work much longer to achieve. Therefore the indicator liquid should be placed as close to the TXV Fig. 2, to see the bubbles exist in the case, but is placed well, you can not know what happens between the liquid and the indicator TXV. Failure bubbles out of the hall, it may have bubbles in the TXV.
Well folks that's all, I hope you liked it.
emanuel es un gran trabajo y es interesante saber sobre la mirilla que es un accesorio importante en la refrigeracion
ResponderEliminara si es amigo, muchas gracias por tu atencion
Eliminar