CONDITIONING PLANT

• US 20120090826A1
• Filed: 10/14/2011
• Published: 04/19/2012
• Est. Priority Date: 10/14/2010
• Status: Active Grant

• Current Assignee: Fimcim S.P.A.
• Original Assignee: Fimcim S.P.A.
• Inventors: Cimberio, Roberto, Guidetti, Tiziano
• Granted Patent: US 9,157,643 B2
• Time in Patent Office: Days
• US Class Current: 165/200
• CPC Class Codes: F16K 37/005 for measuring fluid parameters F16K37/0033 takes precedence
• CPC Class Codes: F16K 5/0605 with particular plug arrangements, e.g. particular shape or built-in means
• CPC Class Codes: F24D 19/1015 using a valve or valves
• CPC Class Codes: F24D 3/1066 Distributors for heating liquids
• CPC Class Codes: F24F 11/0001 for ventilation F24F11/30 takes precedence
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/84 using valves
• CPC Class Codes: F24F 2110/00 Control inputs relating to air properties
• CPC Class Codes: F24F 3/0442 with volume control at a constant temperature
• CPC Class Codes: F24F 3/052 Multiple duct systems, e.g. systems in which hot and cold air are supplied by separate circuits from the central station to mixing chambers in the spaces to be conditioned
• CPC Class Codes: F24F 5/0089 Systems using radiation from walls or panels

Abstract

A conditioning plant comprises a general inlet, a general outlet, a circuit which sets the general inlet in fluid communication with the general outlet, a plurality of users arranged on the circuit, and a balancing system. The balancing system comprises a sensor for detecting at least a real value depending on a difference of intensity between upstream and downstream of the users, of at least a physical parameter of the fluid; the balancing system further comprises a flow regulating organ, and a control device connected to the sensor, acting on the flow regulating organ and configured for enabling memorisation of at least a reference value of a same physical parameter of the fluid, comparing the reference value with the real value, commanding the to regulating organ to regulate the fluid internally of the circuit such as to maintain the real value substantially aligned with the reference value.

Claims

1. A regulating valve for fluids for plants, in particular conditioning plants, comprising:

at least a valve body exhibiting at least an inlet, at least an outlet and at least a channel which sets the inlet in fluid communication with the outlet,

at least a fluid check element operating in the channel, the fluid check element defining a passage opening for fluid between the inlet and the outlet which has a variable size as a function of positions assumed by the check element in relation to the valve body along a predetermined operating path, the passage opening being shaped such that following a movement of the check element over at least one of;

an initial tract of the operating path,

a final tract of the operating path, and

an initial and a final tract of the operating path, the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value between 0 and 4.00, and

a control device configured for;

receiving in input at least a first signal relating to an intensity of a physical parameter of a fluid circulating in a first section of the plant and a second signal relating to the intensity of the physical parameter of a fluid circulating in the second section of the plant,

generating an output signal as a function of the first signal and the second signal, the output signal being usable for controlling the position of the check element.

2. The regulating valve of claim 1, wherein:

the incremental ratio between the percentage variation of the area of the passage opening and the percentage displacement of the check element, over the initial tract which comprises not more than 30% of the operating path, exhibits an absolute value between 0 and 4;

the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check organ, over the final tract which comprises not more than 40% of the operating path, exhibits an absolute value between 0 and 4;

the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value which is substantially constant over an intermediate tract of the operating path comprised between the initial tract and the final tract, and wherein the intermediate tract comprises between 20% and 40% of the operating path, and

the percentage variation of the area of the passage opening comprises the ratio between the variation of the passage area following a displacement of the check organ and a reference area, and wherein the percentage displacement comprises the ratio between the displacement of the check element and the operating path.

3. The regulating valve of claim 1, wherein:

the incremental ratio between the percentage variation of the area of the passage opening and the percentage displacement of the check element, over the initial tract which comprises not more than 30% of the operating path, exhibits an absolute value between 0 and 2.5;

the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check organ, over the final tract which comprises not more is than 40% of the operating path, exhibits an absolute value between 0 and 2.5;

the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value which is substantially constant over an intermediate tract of the operating path comprised between the initial tract and the final tract, and wherein the intermediate tract comprises between 20% and 40% of the operating path, and

the percentage variation of the area of the passage opening comprises the ratio between the variation of the passage area following a displacement of the check organ and a reference area, and wherein the percentage displacement comprises the ratio between the displacement of the check element and the operating path.

4. The regulating valve of claim 1, wherein the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value between 0.00 and 2.50.

5. The regulating valve of claim 1, wherein:

the first signal and the second signal relate to the intensity of the fluid pressure in the first section and the second section of the plant,

generating the output signal comprises determining a control differential signal comprising a difference or a ratio between the intensity of the first signal and the second signal, and

the control differential signal comprises one selected from the difference and the ratio between the intensity of the fluid pressure in the first section and the intensity of the fluid pressure in the second section.

6. The regulating valve of claim 5, wherein the control device comprises a pressure differential gauge which receives in input the first signal and the second signal and generates in output the control differential signal.

7. The regulating valve of claim 1, wherein the control device is configured to:

enable setting at least a reference value,

compare the reference value with the value of the control differential signal, and

generate the output signal as a function of the comparison.

8. The regulating valve of claim 1, wherein the control device comprises an actuator acting on the check element, the actuator being configured to enable displacement of the check element along the operating path, the control device being connected with the actuator, the control device further being configured such as to control a movement of the check element as a function of the output signal.

9. The regulating valve of claim 8, wherein the control device is configured for:

positioning the check element according to a plurality of positions along the operating path, the positions being separated by a step, the control device repeating the steps of comparison and generation at each of the positions; and

controlling the size of the step by which the actuator moves the check element as a function of the value of the control differential signal and the reference value.

10. The regulating valve of claim 9, wherein the control device controls the size of the step according to which the actuator moves the check element as a function of the difference between the value of the control differential signal and the reference value.

11. The regulating valve of claim 1, wherein the control device is configured such as to control the movement of the check element and to determine the reduction of the difference between the reference value and the value of the control differential signal.

12. The regulating valve of claim 1, wherein the control device comprises setting means, the setting means being connected to the control device and enabling setting of a predetermined number of control parameters which define operating conditions of the valve, and wherein the control parameters comprise at least a parameter selected from the group having:

a first control parameter relating to a type of movement of the check element,

a second control parameter relating to a maximum excursion of the values of the first signal and the second signal or of the value of the difference between the first signal and the second signal,

a third control parameter relating to the type of function connecting the output signal and the first signal and the second signal,

a fourth control parameter relating to a velocity of convergence between the real value and the reference value,

wherein the second control parameter comprises bottom scale values of the pressure differential gauge, wherein in relation to the third parameter the function comprises a link of a proportional or integral or derivative type, or a combination thereof, and wherein the fourth control parameter specifies a convergence time defined as a time transitory in which the value of the control differential signal converges to the reference value, and

wherein the setting means enable memorization of a predetermined number of configurations relating to values of the control parameters which are useful for managing the control device, optionally wherein the setting means comprise microswitches.

13. The regulating valve claim 1, wherein the control device comprises input means, the input means enabling setting at least a reference value, optionally enabling setting a reference pressure differential between the first section and the second section, and wherein the control device comprises a memory and is configured such as to enable memorization of a plurality of predetermined reference values and to enable a user to select at least one of the values.

14. The regulating valve of claim 3, wherein:

the check element operating in the channel of the valve body is configured such as to rotate according to a movement angle with respect to a rotation axis which extends transversally to with respect to a prevalent development axis of the channel, wherein the check organ exhibits a lateral rotating surface having a cylindrical or spherical conformation;

the incremental ratio between a percentage variation of the area of the passage opening and the percentage displacement of the check element, over the initial tract comprised between 20% and 30% of the operating path, falls within a range of between 0 and 1.5; and

the incremental ratio between a percentage variation of the area of the passage opening and the percentage displacement of the check element, over the final tract comprised between 20% and 30% of the operating path, falls within a range of between 0 and 1.5.

15. The regulating valve of claim 1, wherein the passage opening comprises a frontal shaping exhibiting two substantially symmetrical parts in which each of the parts exhibits a first portion shaped as an arc of a circle, a second portion shaped as an arc of a circle having a smaller radius than the arc of the first portion, a connecting inflection which connects the first portion with the second portion, and/or wherein the passage opening comprises a longitudinal shaping relating to a longitudinal section with respect to the prevalent development axis of the channel, exhibiting a progressively growing section from the inlet to the outlet of the valve body.

16. A regulating valve for fluids for plants, in particular conditioning plants, comprising:

at least a valve body exhibiting at least an inlet, at least an outlet and at least a channel which sets the inlet in fluid communication with the outlet,

at least a fluid check element operating in the channel, the fluid check element defining, in cooperation with the valve body, a passage opening for fluid between the inlet and the outlet which has a variable size as a function of positions assumed by the check element in relation to the valve body along a predetermined operating path, the check organ being configured such as to rotate with respect to a rotation axis which extends transversally with respect to a prevalent development axis of the channel,

at least a control device configured for;

receiving in input at least a first signal relating to an intensity of a physical parameter of the fluid circulating in a first section of the plant and a second signal relating to the intensity of the physical parameter of a fluid circulating in the second section of the plant, and

generating an outlet signal as a function of the first signal and the second signal, the outlet signal being usable for controlling the angular position of the check element.

17. The regulating valve of claim 16, wherein the control device is configured such as is to move the check element in a plurality of operating positions which are reciprocally angularly offset, and wherein an angular step is defined between an operating position and an angularly subsequent operating position, the control device repeating the receiving and generating stages of receiving and generating in a predetermined number of the operating positions, optionally at each thereof.

18. The regulating valve of claim 17, wherein the angular step, at least over a predetermined tract of the operating path, is less than 1°

.

19. The regulating valve of claim 17, wherein at least over a tract of the operating path the angular step is not constant, and wherein the tract in which the step is not constant comprises at least 10% of the operating path.

20. The regulating valve of claim 17, wherein the size of the angular step is a function of the intensity of the physical parameter of the fluid circulating in the first section and the intensity of the physical parameter of the fluid circulating in a second section of the plant, wherein the angular step reduces progressively on reduction of a difference between a reference value and a real value given by a difference of intensity of the physical parameter of the fluid circulating in the first section and the intensity of the physical parameter of the fluid circulating in a second section.

21. The regulating valve of claim 17, wherein the tract of the operating path in which the step constant and is less than 1°

comprises an initial tract of the operating path, the initial tract being in turn comprised between an initial position of complete closure of the passage opening and an intermediate position in which the passage opening is open to not more than 40%.

22. The regulating valve of claim 17, wherein the tract of the operating path in which the step is not constant and is less than 1°

comprises a final tract of the operating run, the final tract being in turn comprised between a final position of complete opening of the passage and an intermediate position in which the passage opening is open to not more than 50%.

23. The regulating valve of claim 16, wherein the passage opening is shaped such that following a movement of the check element over one of the initial tract and the final tract of the operating path, the incremental ratio between the percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value between 0 and 4.

24. The regulating valve of claim 23 wherein:

the incremental ratio between the percentage variation of the area of the passage opening and the percentage displacement of the check element, over the initial tract which comprises not more than 30% of the operating path, exhibits an absolute value between 0 and 4,

the incremental ratio between the percentage variation of the area of the passage opening and the percentage displacement of the check element, over the final tract which comprises not more than 40% of the operating path, exhibits an absolute value between 0 and 4,

the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value which is substantially constant over an intermediate tract of the operating run comprised between the initial tract and the final tract,

the intermediate tract comprises between 20% and 40% of the operating path, and

the percentage variation of the area of the passage opening comprises the ratio between the variation of the passage area following a displacement of the check element and a reference area, and wherein the percentage displacement comprises the ratio between the displacement of the check element and the operating path.

25. The regulating valve of claim 16, wherein the first signal and the second signal relate to an intensity of the fluid pressure in the first section and the second section of the plant, and wherein generating the outlet signal comprises determining a control differential signal comprising a difference or a ratio between the intensity of the first signal and the second signal, wherein the control differential signal comprises one selected from the group of:

the difference and the ratio between the intensity of the fluid pressure in the first section and the intensity of the fluid pressure in the second section, and

the ratio between the intensity of the fluid pressure in the first section and the intensity of the fluid pressure in the second section.

26. The regulating valve of claim 25, wherein the control device comprises a pressure differential gauge which receives in input the first signal and the second signal and generates in output the control differential signal.

27. The regulating valve claim 16, wherein the control device is configured such as to:

enable setting at least a reference value,

compare the reference value with the value of the control differential signal, and

generate the output signal as a function of the comparison,

wherein the control device comprises an actuator acting on the check element the actuator and configured for enabling displacement of the check element along the operating path, according to the plurality of positions separated by the step, and wherein the control device is further configured for;

repeating the stage of comparison and generation at each of the positions; and

controlling the size of the step by which the actuator moves the check element as a function of the value of the control differential signal and the reference value.

28. The regulating valve of claim 16, comprising setting means, also connected to the control device, which control device is configured to enable, via the setting means, setting a predetermined number of control parameters which define operating conditions of the valve, the control parameters comprising at least a parameter selected from the group including:

a first control parameter relating to a type of movement of the check element,

a second control parameter relating to a maximum excursion of the values of the first signal and the second signal or of the value of the difference between the first signal and the second signal,

a third control parameter relating to the type of function connecting the outlet signal and the first signal and the second signal, and

a fourth control parameter relating to a velocity of convergence between the real value and the reference value,

the setting means being configured for enabling memorization of a predetermined number of configurations relating to values of the control parameters which are useful for managing the control device.

29. The regulating valve of claim 25, wherein:

the control device is configured such as to control the movement of the check element, enabling a reduction of the difference between the reference value and the value of the control differential signal,

the incremental ratio between a percentage variation of the area of the passage opening and the percentage displacement of the check element, over the initial tract comprised between 20% and 30% of the operating path, falls within a range of between 0 and 1.5, and

the incremental ratio between a percentage variation of the area of the passage opening and the percentage displacement of the check organ, over the final tract comprised between 20% and 30% of the operating path, falls within a range of between 0 and 1.5.

30. A conditioning plant, comprising:

at least a general inlet;

at least a general outlet;

a circuit which sets the general inlet in fluid communication with the general outlet;

a plurality of users arranged on the circuit; and

at least a balancing system of the flow acting on the circuit, the balancing system comprising;

at least a sensor for detecting at least a real value depending on a difference of intensity between a first section upstream of the users and a second section downstream of the users, of at least a physical parameter of the fluid,

at least a flow regulating organ,

at least a control device connected to the sensor, acting on the flow regulating organ and configured for;

enabling memorization of at least a reference value of a same physical parameter of the fluid,

comparing the reference value with the real value,

commanding the regulating organ via an output signal in order to regulate the fluid internally of the circuit such as to maintain the real value substantially aligned with the reference value, or such as to reduce a difference between real value and reference value.

31. The plant of claim 30, comprising a first detecting line which places a first point of the circuit situated upstream of each user in fluid communication with the sensor of the balancing system and in which the plant comprises a second detection line which sets a second point of the circuit situated downstream of each user in fluid communication with the sensor of the balancing system, optionally wherein the second point is situated substantially on the regulating organ, the regulating organ being situated downstream of each user, directly connected on the circuit and in fluid communication with the sensor, and wherein the sensor is one in the group of:

a differential sensor, which enables detecting the intensity difference between upstream and downstream of the users of the physical parameter of the fluid, and wherein the sensor detects a difference between a first real value relative to the intensity of the physical parameter at the first point of the circuit, and a second real value relative to the intensity of the physical parameter relative to the second point of the circuit, and

a first sensor, which is in fluid connection with the first detecting line and enables detecting the intensity of the physical parameter at the first point of the circuit, and a second sensor which is in fluid connection with the second detecting line and enables detecting the intensity of the physical parameter at the second point of the circuit.

32. The plant of claim 30, wherein:

each user comprises a respective delivery channel emerging from the circuit, a respective return channel in fluid connection with the delivery channel and arranged such as to return fluid into the circuit, at least a user device hydraulically interposed between the delivery channel and the return channel,

each user exhibits at least a respective closing organ, partial or total, arranged either on the delivery channel or on the return channel,

the plant comprises at least a delivery manifold arranged upstream of the users, at least a return manifold arranged downstream of the users, the delivery manifold and the return manifold being respectively connected to the general inlet for the distribution of the fluid to the users and to the general outlet for collecting the fluid in outlet from the users, and

the regulating organ is engaged to a line interposed between an outlet of the return manifold and the general outlet.

33. The plant of claim 30, wherein the regulating organ and the control device are part of a regulating valve operating downstream of the users, wherein the regulating valve comprises:

at least a valve body exhibiting at least an inlet,

at least an outlet and at least a channel which sets the inlet in fluid communication with the outlet, and

at least a check element of fluid operating in the channel and forming the regulating organ together with the valve body,

wherein the fluid check element defines, in cooperation with the valve body, a passage opening for fluid between the inlet and the outlet of a variable size, according to positions assumed by the check element in relation to the valve body along a predetermined operating path, the check element being configured such as to rotate with respect to a rotation axis which extends transversally with respect to a prevalent axis of development of the channel, and

wherein the command stage the control unit is configured to execute comprises moving the check element among a plurality of distinct operating positions which are angularly offset to one another, and wherein an angular step is defined between an operating position and an angularly subsequent operating position, the control device, following each angular step, being configured to cyclically repeat the stages of comparison and command, further wherein the angular step, at least over a predetermined tract of the operating path, satisfies at least one of the to following conditions;

the angular step is less than 1°

,

the angular step is not constant over the operating path,

the size of the angular step is a function of the intensity of the physical parameter of the fluid circulating in the first section and the intensity of the physical parameter of the fluid circulating in a second section of the plant, and

the size of the angular step reduces progressively on reduction of a difference between a reference value and a real value given by a difference of intensity of the physical parameter of the fluid circulating in the first section and the intensity of the physical parameter of the fluid circulating in a second section.

34. The plant of claim 33, wherein the tract of the operating path in which the step satisfies one or more of the conditions comprises at least one of:

an initial tract of the operating path, the initial tract being in turn comprised between an initial position of complete closure of the passage opening and an intermediate position in which the passage opening is open to not more than 40% and

a final tract of the operating path, the final tract being in turn comprised between a final position of complete opening of the passage and an intermediate position in which the passage opening is open to not more than 50%.

35. The plant of claim 33, wherein the passage opening is shaped such that following a movement of the check element over one of an initial tract and a final tract of the operating path, the incremental ratio between the percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value between 0 and 4.

36. The plant of claim 35, wherein

the incremental ratio between the percentage variation of the area of the passage opening and the percentage displacement of the check element, over the initial tract which comprises not more than 30% of the operating run, exhibits an absolute value between 0 and 4;

the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check element, over the final tract which comprises not more than 40% of the operating run, exhibits an absolute value between 0 and 4;

the incremental ratio between percentage variation of the area of the passage opening and the percentage displacement of the check element exhibits an absolute value which is substantially constant over an intermediate tract of the operating path comprised between the initial tract and the final tract, and wherein the intermediate tract comprises between 20% and 40% of the operating path, and

the percentage variation of the area of the passage opening comprises the ratio between the variation of the passage area following a displacement of the check organ and a reference area, and wherein the percentage displacement comprises the ratio between the displacement of the check element and the operating path.

37. The plant of claim 30, wherein the control device is configured for:

receiving in input at least a first signal relating to an intensity of the physical parameter of the fluid circulating in the first section of the plant and a second signal relating to the intensity of the physical parameter of a fluid circulating in the second section of the plant; and

generating the output signal as a function of the first signal and the second signal,

wherein the first signal and the second signal relate to an intensity of the fluid pressure in the first section and the second section of the plant, and wherein generating the output signal comprises determining a control differential signal comprising one of a difference and a ratio between the intensity of the first signal and the second signal, wherein the control differential signal comprises one of the difference and ratio between the intensity of the fluid pressure in the first section and the intensity of the fluid pressure in the second section, wherein the control device comprises a pressure differential gauge which receives in input the first signal and the second signal and generates in output the control differential signal.

38. The plant of claim 37, wherein the control device is configured to:

enable setting at least a reference value,

compare the reference value with the value of the control differential signal, and

generate the output signal as a function of the comparison,

the control device comprising an actuator acting on the check element, the actuator to configured for enabling displacement of the check element along the operating path, the control device being connected with the actuator, the control device further being configured to command a movement of the check element as a function of the output signal and to position the check element according to the plurality of positions along the operating path.