Fluid circulation pump for heating and conditioning systems and the like

• US 20050180857A1
• Filed: 02/07/2005
• Published: 08/18/2005
• Est. Priority Date: 02/12/2004
• Status: Abandoned Application

• Current Assignee: Askoll Holding SRL (Elio Marioni)
• Original Assignee: Askoll Holding SRL (Elio Marioni)
• Inventors: Marioni, Elio
• Application Number:
  US11/052,272
• Publication Number:
  US 20050180857A1
• Time in Patent Office: Days
• US Class Current: 417/43
• CPC Class Codes: F04B 2203/0203 Magnetic flux
• CPC Class Codes: F24D 19/0092 Devices for preventing or removing corrosion, slime or scale
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The present invention relates to a method for measuring a parameter characteristic of a heating and/or conditioning system (1) equipped with a primary hydraulic circuit (6) and a secondary hydraulic circuit (9) and wherein at least one operative fluid circulation pump (2) is provided operated by an electric motor and driven by a control electronic device (10). The method provides: a starting measure of the flow rate of the circulating operative fluid carried out with closed delivery, immediately downstream the pump;

• a subsequent measure of the flow rate of the circulating operative fluid in the sole secondary hydraulic circuit (9);
• the first and the second measure being carried out with means associated to the control device (10) of the pump (2) so as to output an electric signal correlated with the percentage of additive of the circulating operative fluid or with a variation of the calorific power of the system.

Claims

1. Fluid circulation pump (2), in particular for a heating and/or conditioning system (1) equipped with a primary hydraulic circuit (6) and with a secondary hydraulic circuit (9) and wherein the pump is operated by a synchronous electric motor (12) and driven by a control electronic device (10), characterised in that said device (10) comprises a processing unit (22) receiving at its input a first signal (24) coming from a magnetic flux sensor (20) of the rotor (14) and a second network synchronism signal (24) and being equipped with or associated to a memory portion wherein experimental data are stored of correlation between the hydraulic flow rate (Q) values and an operation variable of the pump'"'"'s motor;

so as to produce a signal output correlated with the percentage of additive of the circulating operative fluid.

2. Pump according to claim 1, characterised in that said variable is the load angle θ

and that said sensor (20) is a digital Hall sensor.

3. Pump according to claim 1, characterised in that said variable is the load angle θ

and that said sensor (20A) is an analog Hall sensor.

11. Heating and/or conditioning system equipped with a primary hydraulic circuit (6) and with a secondary hydraulic circuit (9) and characterised in that it comprises at least one fluid circulation pump according to claim 1.

4. Method for measuring a parameter characteristic of a heating and/or conditioning system (1) equipped with a primary hydraulic circuit (6) and with a secondary hydraulic circuit (9) and wherein at least one operative fluid circulation pump (2) operated by an electric motor and driven by a control electronic device (10) is provided, characterised in that it provides:

a starting measure of the flow rate of the circulating operative fluid carried out with closed delivery, immediately downstream the pump;

a subsequent measure of the flow rate of the circulating operative fluid in the sole secondary hydraulic circuit (9);

said first and second measure being carried out with means associated to the control device (10) of the pump (2) so as to output an electric signal correlated with the percentage of additive of the circulating operative fluid or with a variation of the calorific power of the system.

5. Method according to claim 4, characterised in that the pump (2) is operated by a synchronous electric motor (12) with a permanent magnet rotor (14) and in that said first and second measure are carried out through the following steps of:

acquisition of at least one operation variable of the pump;

comparison between the value of said variable and a predetermined table of correlation with hydraulic flow rate values and determination of a corresponding flow rate value.

6. Method according to claim 5, characterised in that said at least one operation variable of the pump is a load angle or delay θ

, i.e. a phase shift angle between the network voltage applied at the ends of the motor (12) and counter electromotive force caused by the sum of the effects of the stator flux and of the flux induced by the rotation of the rotor (14) permanent magnet.

7. Method according to claim 6, characterised in that it provides the acquisition of a further operation variable of the pump such as the temperature of the rotor magnet.

8. Method according to claim 7, characterised in that it provides the detection of a signal proportional to the residual induction (B_R) of the ferromagnetic material of the rotor (14) and dependent on the operation temperature, by means of a Hall sensor (20A) of the analog type.

9. Method according to claim 5, characterised in that said at least one operation variable of the pump is a load angle, or delay θ

, detected by means of a digital Hall sensor (20).

10. Method according to claim 5, characterised in that said at least one operation variable of the pump is a load angle, or delay θ

, detected by means of an analog Hall sensor (20A).