Integrated zoning circulator with priority controller

• US 5,622,221 A
• Filed: 05/17/1995
• Issued: 04/22/1997
• Est. Priority Date: 05/17/1995
• Status: Expired due to Term

• Current Assignee: Taco, Inc.
• Original Assignee: Taco, Inc.
• Inventors: McCarthy, Michael, Genga, Richard A. Jr., Pishdadian, Hamid
• Primary Examiner(s): Ford, John K.
• Application Number:
  US08/443,112
• Time in Patent Office: 706 Days
• Field of Search: 165/208, 165/209, 165/219, 165/247, 165/50, 237/8 R, 237/8 A, 236/9 A, 236/1 B, 236/37
• US Class Current: 165/208
• CPC Class Codes: F24D 19/1012 by regulating the speed of a pump
• CPC Class Codes: G05D 23/1934 each space being provided with one sensor acting on one or more control means
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

An integrated zoning circulator includes a priority controller, integral with the zoning circulator, for determining the priority given to the circulator in an individual zone of a multi-zone hydronic system. The zoning circulator also includes a priority circulator system for a multi-zone hydronic system having a zoning circulator at each zone, a plurality of control boxes each having a thermostat, one control box being associated with each circulator, and, a plurality of priority controllers, one priority controller being associated with each control box. Each priority controller, when activated, functions to assure that when the associated thermostat calls for the circulator to operate, other circulators in non-priority mode are prevented from operating simultaneously.

Claims

1. An integrated zoning circulator associated with an individual zone of a hydronic heating or cooling system that includes a plurality of zones, each zone including a thermostat associated with the zoning circulator, the integrated zoning circulator comprising:

a wet-rotor circulator motor disposed within a motor housing, and;

a priority controller, for determining priority of operation for the integrated zoning circulator, said controller disposed within a controller housing integral with the motor housing said priority controller comprising;

a manual switch having a setting selectable by a user of the hydronic system for establishing the priority of operation for the zoning circulator relative to other zoning circulators in the system; and

circuitry, connected to the zoning circulator and manual switch, adapted to operate the zoning circulator and to prevent simultaneous operation of zoning circulators in other zones that have manual switch settings of lower priority than the selected setting of the manual switch, when the thermostat, associated with the zone in which the integrated zoning circulator is disposed, calls for the zoning circulator in that zone to operate.

2. The integrated zoning circulator of claim 1 wherein when the manual switch has a setting of higher priority than switch settings of manual switches of integrated zoning circulators in other zones and the thermostat, associated with the zone in which the integrated zoning circulator is disposed, calls for the zoning circulator in that zone to be non-operational, the priority controller provides power to the priority controllers in other zones having lower priority to allow operation of circulators in those zones.

3. The integrated zoning circulator of claim 1 wherein said circuitry further comprises

electrical inlet ports for accepting low voltage thermostat leads, low voltage heat exchanger control leads, high voltage supply leads, and priority line power leads,

an electrical outlet port connected to the zoning circulator,

a voltage transforming device configured for transforming a high voltage delivered on the high voltage supply leads to a low voltage,

an electrical switching device having low voltage activation input terminals, the switching device configured to switch a low voltage switched output terminal and a high voltage switched output terminal when low voltage is supplied to the activation input terminals,

low voltage conductors within the housing for connecting the low voltage thermostat leads to the low voltage output of the voltage transforming device and to the low voltage activation terminals of the electrical switching device and for connecting the low voltage switched output terminal to the low voltage heat exchanger control leads, and

high voltage conductors within the housing for supplying the high voltage from the high voltage supply leads to the manual switch and for connecting the high voltage switched output terminal of the electrical switching device between the manual switch and the electrical outlet port.

4. The integrated zoning circulator of claim 3 wherein the electrical switching device is an electrical relay.

5. The integrated zoning circulator of claim 3 wherein the voltage transforming device is a transformer.

6. The integrated zoning circulator of claim 1 wherein said circuitry further comprises

a microcontroller for controlling the operation of the zoning circulator on the basis of priority settings of manual switches of other priority controllers of the hydronic system.

7. The integrated zoning circulator of claim 1 wherein said wet-rotor circulator motor further comprises:

a stator disposed within the motor housing and sealed from the circulating fluid,

a rotor housing disposed within the motor housing within the stator, the rotor housing being unsealed from the circulating fluid so that the fluid enters the rotor housing,

a rotor disposed within the rotor housing and in contact with the fluid, and

an impeller affixed to one end of the rotor, the stator and rotor configured with respect to one another so that the rotor is caused to rotate when the stator is energized;

an impeller casing fastened to the motor housing, the impeller casing comprising

an inlet end for accepting the circulating fluid flowing into the impeller casing, the inlet end being configured for attachment to a pipe of the hydronic heating system,

an impeller zone into which the impeller extends from the motor, the impeller zone being in fluid communication with the inlet of the impeller casing, and

an outlet end for discharging the circulating fluid flowing from the impeller casing, the outlet end being configured for attachment to a pipe of the hydronic heating system.

8. A priority circulator system comprising

a multi-zone hydronic system having a plurality of zones, an integrated zoning circulator associated with each zone, each zone having a thermostat associated with the zoning circulator and, each integrated zoning circulator comprising:

a wet-rotor circulator motor disposed within a motor housing, and;

a priority controller, disposed within a housing integrated with the motor housing controller said priority controller comprising

a manual switch having a setting selectable by a user of the hydronic system for establishing the priority of operation for the zoning circulator relative to other zoning circulators in the system; and

circuitry, connected to the zoning circulator and manual switch, adapted to operate the zoning circulator and to prevent simultaneous operation of zoning circulators in other zones that have manual switch settings of lower priority than the selected setting of the manual switch, when the thermostat, associated with the zone in which the zoning circulator is disposed, calls for the zoning circulator in that zone to operate.

9. The priority circulator system of claim 8 wherein said circuitry of each priority controller is adapted to allow a plurality of priority controllers to be activated simultaneously, so that those zoning circulators have priority over the other zoning circulators.

10. The priority controller system of claim 8 further comprising a communication bus connecting each priority controller and wherein said circuitry of each priority controller further comprises

a microcontroller, connected to the communication bus, for controlling the operation of the circulator on the basis of priority settings of manual switches of other priority controllers of the hydronic system.

11. The priority controller system of claim 8 wherein said circuitry further comprises

electrical inlet ports for accepting low voltage thermostat leads, low voltage heat exchanger control leads, high voltage supply leads, and priority line power leads,

an electrical outlet port connected to the circulator,

a voltage transforming device configured for transforming a high voltage delivered on the high voltage supply leads to a low voltage,

an electrical switching device having low voltage activation input terminals, the switching device being configured to switch a low voltage switched output terminal and a high voltage switched output terminal when low voltage is supplied to the activation input terminals,

low voltage conductors within the housing for connecting the low voltage thermostat leads to the low voltage output of the voltage transforming device and to the low voltage activation terminals of the electrical switching device and for connecting the low voltage switched output terminal to the low voltage heat exchanger control leads, and

high voltage conductors within the housing for supplying the high voltage from the high voltage supply leads to the manual switch and for connecting the high voltage switched output terminal of the electrical switching device between the manual switch and the electrical outlet port.

12. The priority controller system of claim 8 wherein each said wet rotor circulator motor further comprises:

a stator disposed within the motor housing and sealed from the circulating fluid,

a rotor housing disposed within the motor housing within the stator, the rotor housing being unsealed from the circulating fluid so that the fluid enters the rotor housing,

a rotor disposed within the rotor housing and in contact with the fluid, and

an impeller affixed to one end of the rotor, the stator and rotor configured with respect to one another so that the rotor is caused to rotate when the stator is energized;

an impeller casing fastened to the motor housing, the impeller casing comprising

an inlet end for accepting the circulating fluid flowing into the impeller casing, the inlet end being configured for attachment to a pipe of the hydronic heating system,

an impeller zone into which the impeller extends from the motor, the impeller zone being in fluid communication with the inlet of the impeller casing, and

an outlet end for discharging the circulating fluid flowing from the impeller casing, the outlet end being configured for attachment to a pipe of the hydronic heating system.