WO2014044895A1 - System for protecting refrigeration compressors in refrigeration systems and heat-pump heating systems - Google Patents
System for protecting refrigeration compressors in refrigeration systems and heat-pump heating systems Download PDFInfo
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- WO2014044895A1 WO2014044895A1 PCT/ES2013/070657 ES2013070657W WO2014044895A1 WO 2014044895 A1 WO2014044895 A1 WO 2014044895A1 ES 2013070657 W ES2013070657 W ES 2013070657W WO 2014044895 A1 WO2014044895 A1 WO 2014044895A1
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- compressor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2517—Head-pressure valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/195—Pressures of the condenser
Definitions
- the present invention is framed within the systems industrial cold production and heat production. Is especially designed to be implanted in facilities where there is a circuit primary with a refrigeration compressor and a secondary circuit through which circulate a heat carrier fluid that may accidentally pass to the circuit primary and damage compressor components.
- the exchanger is the element that establishes the boundary between both fluids, the refrigerant and the heat carrier fluid. Is in the exchanger where the thermal transfer takes place. Yes for some reason the exchanger is perforated the border between both fluids disappears and They come in contact. Depending on the static pressure of the fluid in each first circuit one of the fluids will invade the other and then occur The reverse situation. The speed of the invasion will depend on the speed, of the flow rate of each fluid in the corresponding circuit and the size of the drilling.
- the present invention proposes a protection system of refrigeration compressors in refrigerant systems and systems heat pump heating.
- Refrigerant systems and systems heat pump heating in which the invention is applied have a primary circuit in which the refrigeration compressor is, which is protected, and through which a cooling fluid circulates, a secondary circuit in which there is a consumption element through which a heat carrier fluid circulates and the energy exchange between both circuits is done by a energy exchanger
- the system developed is based on the control of the primary circuit pressure at the outlet of the exchanger and the pressure from the secondary circuit to the inlet of the exchanger.
- a control that acts on the compressor is activated stopping it and acting on automatic valves placed at the entrance and at the Compressor outlet by blocking it. In this way it becomes independent from the rest of the primary circuit and thus avoided in case of a fluid passage heat carrier from the secondary circuit to the primary circuit, this fluid arrives to the compressor
- the protection system developed includes a pressure sensor located in primary circuit, at the outlet of the exchanger, a pressure sensor located in the secondary circuit, at the entrance of the exchanger, a control system whose inputs are the signals of the pressure sensors mentioned and that performs the necessary calculations to compare the received pressure values with the theoretical pressure values at those points.
- the output of the control system is connected to a valve located in the primary circuit at the compressor inlet, to a valve located in the primary circuit at the outlet of the compressor and itself compressor.
- detecting pressure differences with respect to the values expected sends a signal to stop the compressor and close the valves, closing the inlet and outlet of the compressor and blocking it from the rest of the circuit.
- the control system releases a warning signal to alert operators or users of the situation.
- Control system works with the differential pressure between the primary circuit and the circuit secondary. This signal can be emitted locally, remotely or combining the two options.
- the control system may comprise a card data acquisition and a computer or it can contain an automaton programmable.
- the most important advantage you get with the The use of this system is that it guarantees the protection of the compressor against to possible flooding of the primary circuit with the heat carrier fluid of the secondary circuit
- the present protection system is independent of the control system system used to control production refrigeration system so it can be placed in any installation that is in the design phase or that is already in operation.
- the proposed system sends an alarm signal when there is a leak in the exchanger and just throws the alarm signal under that circumstance, so that false alarms are avoided by decreasing the Freon pressure that could have other causes.
- FIG. 1 shows a representation of the system of Refrigerator compressor protection installed in a system installation Fridge or heat pump heating.
- the present invention proposes a protection system of refrigeration compressors in cooling systems and heating systems by heat pump being these cooling systems and systems of heat pump heating of those comprising a primary circuit (1) in which there is a refrigeration compressor (4) and through which a fluid circulates refrigerant, a secondary circuit (2) in which there is a consumption element (5) and through which a heat carrier fluid circulates. Both circuits are related by an exchanger (3) in which the exchange is carried out of energy between the two circuits.
- the compressor protection system refrigerators of the present invention comprise a control system (8) that It has as inputs to the system the signal of a pressure sensor placed in the exchanger input (6) in the secondary circuit (2) and a sensor pressure placed at the outlet of the exchanger (7) in the primary circuit (1) and that has an outlet connected to the compressor (4) and valves automatic (9) placed at the inlet and outlet of the compressor (4).
- This system can be seen in figure 1.
- the system is based on the study of the values of pressure at the inlet and outlet of the exchanger (3). In particular they are studied the values obtained by the pressure sensor placed at the entrance of the exchanger (6) in the secondary circuit (2) and at the values obtained by the pressure sensor placed at the exchanger outlet (7) in the primary circuit (1).
- both Values are well differentiated. At the time a leak occurs one of the liquids to the other circuit, these values begin to equalize until you reach a time when the pressure value at the inlet and the value Pressure at the outlet are exchanged with respect to their theoretical values.
- the Pressure sensor signals (6, 7) are continuously studied by the control system (8) such that at the moment it detects that there are variations regarding the theoretical values it sends an alarm signal with which it is informed to the user that there is a fluid communication between the circuits.
- the control system (6) commands a signal to the automatic valves (9) at the inlet and outlet of the refrigerator compressor (4) and the refrigerator compressor itself (4).
- the entrance to the refrigerator compressor is closed and the exit of the East.
- One of the most important advantages of the present system is that it gives the alarm signal only if a perforation occurs in the exchanger and the flow of fluid from a circuit to the opposite occurs and vice versa.
- the refrigeration compressor (4) only becomes independent from the rest of the circuit when said perforation occurs in the exchanger since it is the only circumstance under which it could be flooded with the heat carrier fluid circulating through the secondary circuit, which would leave the unusable refrigerator compressor (4).
- a leakage of fluid in any other part of the two circuits as this does not imply a risk of flooding of the refrigerator compressor (4) there is no risk of remaining unusable and therefore no alarm signal is sent or the mentioned refrigerator compressor.
- It is also an object of the present invention a protection method of refrigeration compressors in refrigerant systems and heat pump heating systems using the system of the claim 1 comprising a step of comparing the signals received from the pressure sensor placed in the inlet of the exchanger (6) in the secondary circuit (2) and the pressure sensor placed at the outlet of the exchanger (7) placed in the primary circuit (1) with a value preset pressure for said points, said comparison being made in the control system (8), such that if said values differ the system of control sends a signal to the compressor (4) to stop working and the control system (8) sends a signal to the automatic valves (9) to close them shielding the compressor (4) from the rest of the primary circuit (1).
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention relates to a system for protecting refrigeration compressors in refrigeration systems and heat-pump heating systems, comprising a control system (8) into which are input the signal from a pressure sensor arranged at the inlet of the exchanger (6) in the secondary circuit (2) and the signal from a pressure sensor arranged at the outlet of the exchanger (7) in the primary circuit, and which has an outlet connected to the compressor (4) and to automatic valves (9) arranged at the inlet and the outlet of the compressor (4). The signals received from the pressure sensors (6, 7) at the inlet and at the outlet of the exchanger are compared with a pre-determined value in the control system (8), and if the values differ, a signal is sent to stop the compressor (4) and the automatic valves (9).
Description
La presente invención se enmarca dentro de los sistemas
industriales de producción de frío y de producción de calor. Está especialmente
diseñado para ser implantado en instalaciones en las que hay un circuito
primario con un compresor frigorífico y un circuito secundario por el que
circule un fluido calorportador que pueda pasar accidentalmente al circuito
primario y dañar los componentes del compresor.The present invention is framed within the systems
industrial cold production and heat production. Is especially
designed to be implanted in facilities where there is a circuit
primary with a refrigeration compressor and a secondary circuit through which
circulate a heat carrier fluid that may accidentally pass to the circuit
primary and damage compressor components.
ESTADO DE LA TÉCNICA ANTERIORSTATE OF THE PREVIOUS TECHNIQUE
En los sistemas de refrigeración en los que existe un
circuito primario por el que circula un refrigerante y un circuito secundario
por el que circula un fluido calorportador el intercambio de energía entre
ambos se hace a través de un intercambiador que suele ser el propio condensador
o el evaporador.In refrigeration systems where there is a
primary circuit through which a refrigerant and a secondary circuit circulates
through which a heat carrier fluid circulates the exchange of energy between
both are done through an exchanger that is usually the condenser itself
or the evaporator
El intercambiador es el elemento que establece la
frontera entre ambos fluidos, el refrigerante y el fluido calorportador. Es en
el intercambiador donde se realiza la transferencia térmica. Si por alguna
razón el intercambiador se perfora desaparece la frontera entre ambos fluidos y
entran en contacto. En función de la presión estática del fluido en cada
circuito primero uno de los fluidos invadirá al otro y posteriormente ocurrirá
la situación inversa. La velocidad de la invasión dependerá de la velocidad,
del caudal de cada fluido en el correspondiente circuito y del tamaño de la
perforación.The exchanger is the element that establishes the
boundary between both fluids, the refrigerant and the heat carrier fluid. Is in
the exchanger where the thermal transfer takes place. Yes for some
reason the exchanger is perforated the border between both fluids disappears and
They come in contact. Depending on the static pressure of the fluid in each
first circuit one of the fluids will invade the other and then occur
The reverse situation. The speed of the invasion will depend on the speed,
of the flow rate of each fluid in the corresponding circuit and the size of the
drilling.
El mayor problema que se tiene es que la perforación
del intercambiador puede producirse por múltiples causas (corrosión,
congelación, vibración…) y esta perforación no se detecta hasta que no se
inunda el circuito primario con el fluido calorportador. En ese momento el
compresor queda inservible y la reparación de la instalación pasa por la
sustitución de dicho elemento.The biggest problem is that the drilling
of the exchanger can occur due to multiple causes (corrosion,
freezing, vibration ...) and this perforation is not detected until it is
flood the primary circuit with the heat carrier fluid. At that time the
compressor is unusable and the repair of the installation goes through the
replacement of said element.
Del estado de la técnica se conocen documentos que
describen sistemas anti-inundaciones para bombas de calor para el calentamiento
de piscinas que mide el descenso en la presión de freón y lanza una señal de
alarma cuando dicha presión disminuye de forma inesperada. Esa disminución de
presión puede ser consecuencia de múltiples fallos diferentes y no hay manera
de saber a qué elementos afecta la fuga. Documents of the state of the art are known that
describe anti-flood systems for heat pumps for heating
of pools that measures the decrease in freon pressure and releases a signal of
alarm when said pressure drops unexpectedly. That decrease in
pressure can result from multiple different failures and there is no way
of knowing what elements the leak affects.
Así pues, debido a las importantes consecuencias que
conlleva que haya una fuga en el intercambiador, y la ausencia de sistemas que
permitan identificar de forma inequívoca dichas fugas, se hace necesario un
sistema de protección de los compresores frigoríficos que actúe en los
intercambiadores en circuitos de intercambio de calor. So, due to the important consequences that
it implies that there is a leak in the exchanger, and the absence of systems that
allow to identify unequivocally such leaks, a
protection system for refrigeration compressors acting on the
exchangers in heat exchange circuits.
EXPLICACIÓN DE LA INVENCIÓNEXPLANATION OF THE INVENTION
La presente invención propone un sistema de protección
de compresores frigoríficos en sistemas refrigerantes y en sistemas de
calefacción por bomba de calor. Los sistemas refrigerantes y los sistemas de
calefacción por bomba de calor en los que se aplica la invención tienen un
circuito primario en el que está el compresor frigorífico, que se protege, y
por el que circula un fluido refrigerante, un circuito secundario en el que
está un elemento de consumo por el que circula un fluido calorportador y el
intercambio de energía entre ambos circuitos se realiza mediante un
intercambiador de energía.The present invention proposes a protection system
of refrigeration compressors in refrigerant systems and systems
heat pump heating. Refrigerant systems and systems
heat pump heating in which the invention is applied have a
primary circuit in which the refrigeration compressor is, which is protected, and
through which a cooling fluid circulates, a secondary circuit in which
there is a consumption element through which a heat carrier fluid circulates and the
energy exchange between both circuits is done by a
energy exchanger
El sistema desarrollado se basa en el control de la
presión del circuito primario a la salida del intercambiador y de la presión
del circuito secundario a la entrada del intercambiador. Al detectar una
diferencia de presión entre la presión medida en dichos puntos y la presión
teórica en dichos puntos, se activa un control que actúa sobre el compresor
parándolo y actúa sobre unas válvulas automáticas colocadas a la entrada y a la
salida del compresor blindándolo. De esta forma se independiza del resto del
circuito primario y se evita así que en caso de que haya un paso del fluido
calorportador del circuito secundario al circuito primario, este fluido llegue
al compresor. The system developed is based on the control of the
primary circuit pressure at the outlet of the exchanger and the pressure
from the secondary circuit to the inlet of the exchanger. When detecting a
pressure difference between the pressure measured at these points and the pressure
theoretical at these points, a control that acts on the compressor is activated
stopping it and acting on automatic valves placed at the entrance and at the
Compressor outlet by blocking it. In this way it becomes independent from the rest of the
primary circuit and thus avoided in case of a fluid passage
heat carrier from the secondary circuit to the primary circuit, this fluid arrives
to the compressor
El sistema de protección desarrollado comprende un
sensor de presión situado en circuito primario, a la salida del intercambiador,
un sensor de presión situado en el circuito secundario, a la entrada del
intercambiador, un sistema de control que tiene como entradas las señales de
los sensores de presión mencionados y que realiza los cálculos necesarios para
comparar los valores recibidos de presión con los valores teóricos de presión
en dichos puntos. La salida del sistema de control está conectada a una válvula
situada en el circuito primario a la entrada del compresor, a una válvula
situada en el circuito primario a la salida del compresor y al propio
compresor. En caso de detectar diferencias de presión respecto a los valores
esperados manda una señal para parar el compresor y cerrar las válvulas,
cerrando así la entrada y la salida del compresor y blindándolo del resto del
circuito. Asimismo en este caso el sistema de control lanza una señal de aviso
para alertar a los operarios o usuarios de la situación. El sistema de control
trabaja con la presión diferencial entre el circuito primario y el circuito
secundario. Esta señal se puede emitir de forma local, de forma remota o
combinando las dos opciones.The protection system developed includes a
pressure sensor located in primary circuit, at the outlet of the exchanger,
a pressure sensor located in the secondary circuit, at the entrance of the
exchanger, a control system whose inputs are the signals of
the pressure sensors mentioned and that performs the necessary calculations to
compare the received pressure values with the theoretical pressure values
at those points. The output of the control system is connected to a valve
located in the primary circuit at the compressor inlet, to a valve
located in the primary circuit at the outlet of the compressor and itself
compressor. In case of detecting pressure differences with respect to the values
expected sends a signal to stop the compressor and close the valves,
closing the inlet and outlet of the compressor and blocking it from the rest of the
circuit. Also in this case the control system releases a warning signal
to alert operators or users of the situation. Control system
works with the differential pressure between the primary circuit and the circuit
secondary. This signal can be emitted locally, remotely or
combining the two options.
El sistema de control puede comprender una tarjeta de
adquisición de datos y un ordenador o bien puede contener un autómata
programable.The control system may comprise a card
data acquisition and a computer or it can contain an automaton
programmable.
La ventaja más importante que se obtiene con la
utilización de este sistema es que garantiza la protección del compresor frente
a posibles inundaciones del circuito primario con el fluido calorportador del
circuito secundario. Además el presente sistema de protección es independiente
del sistema del sistema de control que se utilice para controlar la producción
frigorífica de la instalación por lo que se puede colocar en cualquier
instalación que esté en fase de diseño o que esté ya en funcionamiento.The most important advantage you get with the
The use of this system is that it guarantees the protection of the compressor against
to possible flooding of the primary circuit with the heat carrier fluid of the
secondary circuit In addition the present protection system is independent
of the control system system used to control production
refrigeration system so it can be placed in any
installation that is in the design phase or that is already in operation.
El sistema propuesto manda una señal de alarma cuando
hay una fuga en el intercambiador y solo lanza la señal de alarma bajo esa
circunstancia, de forma que se evitan las falsas alarmas por disminución de la
presión de freón que podrían tener otras causas diferentes.The proposed system sends an alarm signal when
there is a leak in the exchanger and just throws the alarm signal under that
circumstance, so that false alarms are avoided by decreasing the
Freon pressure that could have other causes.
A lo largo de la descripción y las reivindicaciones la
palabra "comprende" y sus variantes no pretenden excluir otras características
técnicas, aditivos, componentes o pasos. Para los expertos en la materia, otros
objetos, ventajas y características de la invención se desprenderán en parte de
la descripción y en parte de la práctica de la invención. Los siguientes
ejemplos y dibujos se proporcionan a modo de ilustración, y no se pretende que
sean limitativos de la presente invención. Además, la presente invención cubre
todas las posibles combinaciones de realizaciones particulares y preferidas
aquí indicadas.Throughout the description and the claims the
word "understand" and its variants are not intended to exclude other features
techniques, additives, components or steps. For experts in the field, others
objects, advantages and features of the invention will be detached in part from
the description and in part of the practice of the invention. The following
Examples and drawings are provided by way of illustration, and are not intended to be
are limiting of the present invention. In addition, the present invention covers
all possible combinations of particular and preferred embodiments
here indicated.
BREVE DESCRIPCIÓN DE LOS DIBUJOSBRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 muestra una representación del sistema de
protección del compresor frigorífico instalado en una instalación de sistema
frigorífico o de calefacción por bomba de calor.FIG. 1 shows a representation of the system of
Refrigerator compressor protection installed in a system installation
Fridge or heat pump heating.
Referencias:References:
1:Circuito primario; 2:Circuito secundario;
3:Intercambiador; 4:Compresor; 5:Elemento de consumo; 6:Sensor de presión en la
entrada del intercambiador; 7:Sensor de presión en la salida del
intercambiador; 8:Sistema de control; 9:Válvula automática1: Primary circuit; 2: Secondary circuit;
3: Exchanger; 4: Compressor; 5: Element of consumption; 6: Pressure sensor in the
exchanger inlet; 7: Pressure sensor at the outlet of the
exchanger; 8: Control system; 9: Automatic valve
EXPOSICION DETALLADA DE MODOS DE REALIZACIÓNDETAILED EXHIBITION OF MODES OF EMBODIMENT
La presente invención propone un sistema de protección
de compresores frigoríficos en sistemas refrigerantes y sistemas de calefacción
por bomba de calor siendo estos sistemas refrigerantes y sistemas de
calefacción por bomba de calor de los que comprenden un circuito primario (1)
en el que hay un compresor frigorífico (4) y por el que circula un fluido
refrigerante, un circuito secundario (2) en el que hay un elemento de consumo
(5) y por el que circula un fluido calorportador. Ambos circuitos están
relacionados mediante un intercambiador (3) en el que se realiza el intercambio
de energía entre los dos circuitos. El sistema de protección de compresores
frigoríficos de la presente invención comprende un sistema de control (8) que
tiene como entradas al sistema la señal de un sensor de presión colocado en la
entrada del intercambiador (6) en el circuito secundario (2) y de un sensor de
presión colocado en la salida del intercambiador (7) en el circuito primario
(1) y que tiene una salida conectada al compresor (4) y a unas válvulas
automáticas (9) colocadas en la entrada y la salida del compresor (4). Este
sistema se aprecia en la figura 1.The present invention proposes a protection system
of refrigeration compressors in cooling systems and heating systems
by heat pump being these cooling systems and systems of
heat pump heating of those comprising a primary circuit (1)
in which there is a refrigeration compressor (4) and through which a fluid circulates
refrigerant, a secondary circuit (2) in which there is a consumption element
(5) and through which a heat carrier fluid circulates. Both circuits are
related by an exchanger (3) in which the exchange is carried out
of energy between the two circuits. The compressor protection system
refrigerators of the present invention comprise a control system (8) that
It has as inputs to the system the signal of a pressure sensor placed in the
exchanger input (6) in the secondary circuit (2) and a sensor
pressure placed at the outlet of the exchanger (7) in the primary circuit
(1) and that has an outlet connected to the compressor (4) and valves
automatic (9) placed at the inlet and outlet of the compressor (4). This
system can be seen in figure 1.
El sistema se basa en el estudio de los valores de
presión a la entrada y salida del intercambiador (3). En concreto se estudian
los valores obtenidos por el sensor de presión colocado en la entrada del
intercambiador (6) en el circuito secundario (2) y a los valores obtenidos por
el sensor de presión colocado en la salida del intercambiador (7) en el
circuito primario (1). Cuando el sistema funciona de forma correcta ambos
valores están bien diferenciados. En el momento en que se produce una fuga de
uno de los líquidos al otro circuito, dichos valores comienzan a igualarse
hasta llegar a un momento en el que el valor de presión a la entrada y el valor
de presión a la salida se intercambian respecto a sus valores teóricos. Las
señales de los sensores de presión (6, 7) son estudiadas continuamente por el
sistema de control (8) tal que en el momento en que detecta que hay variaciones
respecto a los valores teóricos manda una señal de alarma con la que se informa
al usuario de que hay una comunicación de fluidos entre los circuitos.
Asimismo, para evitar que el compresor frigorífico (4) que está en el circuito
primario (1) quede dañado irremediablemente, el sistema de control (6) manda
una señal a las válvulas automáticas (9) que hay a la entrada y la salida del
compresor frigorífico (4) y al propio compresor frigorífico (4). De esta forma
se cierra la entrada al compresor frigorífico y se cierra también la salida de
éste. Asimismo, el compresor frigorífico se para. Queda así independizado del
resto del circuito y se evita una posible entrada del fluido calorportador del
circuito secundario en el compresor frigorífico (4).The system is based on the study of the values of
pressure at the inlet and outlet of the exchanger (3). In particular they are studied
the values obtained by the pressure sensor placed at the entrance of the
exchanger (6) in the secondary circuit (2) and at the values obtained by
the pressure sensor placed at the exchanger outlet (7) in the
primary circuit (1). When the system works correctly both
Values are well differentiated. At the time a leak occurs
one of the liquids to the other circuit, these values begin to equalize
until you reach a time when the pressure value at the inlet and the value
Pressure at the outlet are exchanged with respect to their theoretical values. The
Pressure sensor signals (6, 7) are continuously studied by the
control system (8) such that at the moment it detects that there are variations
regarding the theoretical values it sends an alarm signal with which it is informed
to the user that there is a fluid communication between the circuits.
Also, to prevent the refrigeration compressor (4) that is in the circuit
primary (1) is irretrievably damaged, the control system (6) commands
a signal to the automatic valves (9) at the inlet and outlet of the
refrigerator compressor (4) and the refrigerator compressor itself (4). Thus
the entrance to the refrigerator compressor is closed and the exit of the
East. Also, the refrigerator compressor stops. It is thus independent of
rest of the circuit and a possible entry of the heat carrier fluid from the
secondary circuit in the refrigeration compressor (4).
Una de las ventajas más importantes del presente
sistema es que da la señal de alarma solo si se produce una perforación en el
intercambiador y se produce el paso del fluido de un circuito al contrario y
viceversa. El compresor frigorífico (4) solo se independiza del resto del
circuito cuando se produce dicha perforación en el intercambiador ya que es la
única circunstancia bajo la que podría ser inundado con el fluido calorportador
que circula por el circuito secundario, que es lo que dejaría inservible al
compresor frigorífico (4). Así pues, en caso de que se produzca una fuga de
fluido en cualquier otra parte de los dos circuitos, como esto no supone un
riesgo de inundación del compresor frigorífico (4) no hay riesgo de que quede
inservible y por tanto no se manda ninguna señal de alarma ni se bloquea el
mencionado compresor frigorífico.One of the most important advantages of the present
system is that it gives the alarm signal only if a perforation occurs in the
exchanger and the flow of fluid from a circuit to the opposite occurs and
vice versa. The refrigeration compressor (4) only becomes independent from the rest of the
circuit when said perforation occurs in the exchanger since it is the
only circumstance under which it could be flooded with the heat carrier fluid
circulating through the secondary circuit, which would leave the unusable
refrigerator compressor (4). Thus, in the event of a leakage of
fluid in any other part of the two circuits, as this does not imply a
risk of flooding of the refrigerator compressor (4) there is no risk of remaining
unusable and therefore no alarm signal is sent or the
mentioned refrigerator compressor.
Es también un objeto de la presente invención un
método de protección de compresores frigoríficos en sistemas refrigerantes y
sistemas de calefacción por bomba de calor utilizando el sistema de la
reivindicación 1 que comprende una etapa de comparación de las señales
recibidas del sensor de presión colocado en la entrada del intercambiador (6)
en el circuito secundario (2) y del sensor de presión colocado en la salida del
intercambiador (7) colocado en el circuito primario (1) con un valor
predeterminado de presión para dichos puntos, realizándose dicha comparación en
el sistema de control (8), tal que si dichos valores difieren el sistema de
control envía una señal al compresor (4) para que deje de funcionar y el
sistema de control (8) envía una señal a las válvulas automáticas (9) para
cerrarlas blindando al compresor (4) del resto del circuito primario (1).It is also an object of the present invention a
protection method of refrigeration compressors in refrigerant systems and
heat pump heating systems using the system of the
claim 1 comprising a step of comparing the signals
received from the pressure sensor placed in the inlet of the exchanger (6)
in the secondary circuit (2) and the pressure sensor placed at the outlet of the
exchanger (7) placed in the primary circuit (1) with a value
preset pressure for said points, said comparison being made in
the control system (8), such that if said values differ the system of
control sends a signal to the compressor (4) to stop working and the
control system (8) sends a signal to the automatic valves (9) to
close them shielding the compressor (4) from the rest of the primary circuit (1).
Claims (2)
- Sistema de protección de compresores frigoríficos en sistemas refrigerantes y sistemas de calefacción por bomba de calor siendo estos sistemas refrigerantes y sistemas de calefacción por bomba de calor de los que comprenden un circuito primario (1) en el que hay un compresor frigorífico (4) y por el que circula un fluido refrigerante, un circuito secundario (2) en el que hay un elemento de consumo (5) y por el que circula un fluido calorportador, estando ambos circuitos relacionados mediante un intercambiador (3) en el que se realiza el intercambio de energía entre los dos circuitos, caracterizado por que comprende un sistema de control (8) que tiene como entradas al sistema la señal de un sensor de presión colocado en la entrada del intercambiador (6) en el circuito secundario (2) y de un sensor de presión colocado en la salida del intercambiador (7) en el circuito primario (1) y que tiene una salida conectada al compresor (4) y a unas válvulas automáticas (9) colocadas en la entrada y la salida del compresor (4). Refrigerator compressor protection system in cooling systems and heat pump heating systems being these cooling systems and heat pump heating systems of those comprising a primary circuit (1) in which there is a compressor refrigerator (4) and through which a refrigerant fluid circulates, a circuit secondary (2) in which there is a consumption element (5) and through which a heat carrier fluid, both circuits being related by a exchanger (3) in which the energy exchange between the two takes place circuits, characterized in that it comprises a control system (8) that has as inputs to the system the signal of a pressure sensor placed in the exchanger input (6) in the secondary circuit (2) and a sensor pressure placed at the outlet of the exchanger (7) in the primary circuit (1) and that has an outlet connected to the compressor (4) and valves automatic (9) placed at the inlet and outlet of the compressor (4).
- Método de protección de compresores frigoríficos en sistemas refrigerantes y sistemas de calefacción por bomba de calor utilizando el sistema de la reivindicación 1 que comprende una etapa de comparación de las señales recibidas del sensor de presión colocado en la entrada del intercambiador (6) en el circuito secundario (2) y del sensor de presión colocado en la salida del intercambiador (7) colocado en el circuito primario (1) con un valor predeterminado de presión para dichos puntos, realizándose dicha comparación en el sistema de control (8), tal que si dichos valores difieren el sistema de control envía una señal al compresor (4) para que deje de funcionar y el sistema de control (8) envía una señal a las válvulas automáticas (9) para cerrarlas blindando al compresor (4) del resto del circuito primario (1). Method of protection of refrigeration compressors in systems refrigerants and heat pump heating systems using the system of claim 1 comprising a step of comparing the signals received from the pressure sensor placed at the input of the exchanger (6) in the secondary circuit (2) and the pressure sensor placed in the exchanger outlet (7) placed in the primary circuit (1) with a predetermined pressure value for said points, being performed said comparison in the control system (8), such that if said values differ the control system sends a signal to the compressor (4) so that it leaves of operation and the control system (8) sends a signal to the valves automatic (9) to close them shielding the compressor (4) from the rest of the primary circuit (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ESP201231453 | 2012-09-19 | ||
| ES201231453A ES2456777B1 (en) | 2012-09-19 | 2012-09-19 | PROTECTION SYSTEM FOR REFRIGERANT COMPRESSORS IN COOLING SYSTEMS AND HEAT PUMP HEATING SYSTEMS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014044895A1 true WO2014044895A1 (en) | 2014-03-27 |
Family
ID=50340616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2013/070657 WO2014044895A1 (en) | 2012-09-19 | 2013-09-19 | System for protecting refrigeration compressors in refrigeration systems and heat-pump heating systems |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES2456777B1 (en) |
| WO (1) | WO2014044895A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147977A (en) * | 2017-06-16 | 2019-01-04 | 苏州热工研究院有限公司 | A kind of nuclear power plant's refrigeration machine protection system and method |
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|---|---|---|---|---|
| US5673567A (en) * | 1995-11-17 | 1997-10-07 | Serge Dube | Refrigeration system with heat reclaim and method of operation |
| US5829264A (en) * | 1995-11-17 | 1998-11-03 | Sanyo Electric Co., Ltd. | Air conditioner having refrigerant pressure control means and driving control method therefor |
| US20070130976A1 (en) * | 2005-12-09 | 2007-06-14 | Akehurst Brian J | Parallel condensing unit control system and method |
| US20110219797A1 (en) * | 2007-08-17 | 2011-09-15 | Sanden Corporation | Capacity Control System for Variable Capacity Compressor and Display Device for the System |
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2012
- 2012-09-19 ES ES201231453A patent/ES2456777B1/en active Active
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2013
- 2013-09-19 WO PCT/ES2013/070657 patent/WO2014044895A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5673567A (en) * | 1995-11-17 | 1997-10-07 | Serge Dube | Refrigeration system with heat reclaim and method of operation |
| US5829264A (en) * | 1995-11-17 | 1998-11-03 | Sanyo Electric Co., Ltd. | Air conditioner having refrigerant pressure control means and driving control method therefor |
| US20070130976A1 (en) * | 2005-12-09 | 2007-06-14 | Akehurst Brian J | Parallel condensing unit control system and method |
| US20110219797A1 (en) * | 2007-08-17 | 2011-09-15 | Sanden Corporation | Capacity Control System for Variable Capacity Compressor and Display Device for the System |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147977A (en) * | 2017-06-16 | 2019-01-04 | 苏州热工研究院有限公司 | A kind of nuclear power plant's refrigeration machine protection system and method |
| CN109147977B (en) * | 2017-06-16 | 2020-04-21 | 苏州热工研究院有限公司 | Nuclear power plant refrigerator protection system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2456777B1 (en) | 2015-01-30 |
| ES2456777A1 (en) | 2014-04-23 |
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