Hydronic floor heating systems with features

Patent metadata

Field	Value
Publication number	US-2019242592-A1
Application number	US-201816150053-A
Country	US
Kind code	A1
Filing date	Oct 2, 2018
Priority date	Oct 2, 2017
Publication date	Aug 8, 2019
Grant date	—

Abstract

A hydronic floor heating system as it relates to an HVAC apparatus, approach and system. Aspects of the present system and approach may include a radiant floor optimization mode, low floor temperature in vacation mode, modifying a 300 Hz, or so, reading principle base on implementation of Pseudo-random jittering of a reading event improving short-term accuracy of the individual readings, and a combination of hardware and software filters for using thermal sensors with extended cable length.

First claim

What is claimed is:

1 . A hydronic floor heating system with floor warming elements coupled to a floor, comprising:
a programmable thermostat controller with a display; a first sensor for generating a signal indicative of an external temperature; a second sensor for generating a signal indicative of an ambient temperature; and a processor connected to said first and second temperature sensors; and wherein the display includes a program schedule which allows a user to select one option when setting a low floor temperature limit.

2 . The system of claim 1 , wherein the first sensor is connected to thermostat terminals and a measuring circuit.

3 . The system of claim 1 , wherein the measuring circuit contains a capacitive low pass filter which filtrates interference at higher frequencies.

4 . The system of claim 1 , wherein the selection provides a Yes option to ignore low floor temperature limits during a set period and a No option to maintain the low floor temperature limit.

5 . The system of claim 1 , wherein the programmable thermostat includes a program schedule for setting vacation mode by a single setpoint based on a control mode.

6 . The system of claim 1 , wherein the first sensor is wired to the programmable thermostat with a more or less than a 100 meter cable in combination with a hardware filtration.

7 . The system of claim 6 , wherein the programmable thermostat includes software that contains a more or less 300 Hz sampling process that ensures a filtering of 50 Hz and 60 Hz, or more or less than 50 Hz and 60 Hz.

8 . The system of claim 6 , wherein the programmable thermostat includes software that contains a pseudo-random function which has a reading interval of one or more seconds in a spread interval at random times.

9 . The system of claim 8 , wherein the spread interval is at least +/− 1/50 Hz.

10 . The system of claim 8 , wherein the spread interval is at least +/−20 ms.

11 . A hydronic floor heating thermostat configured to control one or more components of an HVAC system, the thermostat comprising:
a controller; a plurality of temperature sensors; a display with buttons for selecting; and a controller configured to provide one or more control signals wherein the controller is configured to assist a user in setting a temperature limit within the thermostat by providing a decisive selection within the display for the user to select or allow one temperature limit to be set, and in response perform an action.

12 . The thermostat of claim 11 , wherein the decisive selection needs a Yes or No from a user.

13 . The thermostat of claim 11 , wherein only an “Away” setpoint is maintained based on a control mode.

14 . The thermostat of claim 11 , wherein the plurality of temperature sensors measure at least external temperature and ambient temperature.

15 . The thermostat of claim 11 , wherein the thermostat is connected to an external sensor using an extended cable of at least 5 m.

16 . A method of implementing pseudo-random jittering in a hydronic flooring system, the method comprising:
receiving a plurality of individual readings from sensor data regarding an external temperature; and applying a 300 Hz, or a more or less than 300 Hz reading principle to the plurality of individual readings.

17 . The method of claim 16 , wherein an external temperature sensor measuring circuit contains a capacitive low pass filter which filtrates interference at higher frequencies .

18 . The method of claim 16 , wherein the individual readings are randomly phase swept.

19 . The method of claim 18 , wherein a phase jittering range has an amplitude of at least +/−20 ms.

20 . The method of claim 16 , wherein the individual reading period is 1/300 Hz, or more or less than 1/300 Hz.

Assignees

• Honeywell Int Inc

Inventors

• Adamek Martin
• Mrazek Leos
• Vomocil Jan
• Crhonek Jiri
• Vozenilek Jan
• Sapak Jiri
• Meran Oto
• Sicner Michal
• Cechak Jaromir
• Cervinka Roman
• Becvar Daniel

Classifications

• G05D23/1931

  to control the temperature of one space · CPC title

• F24F11/52

  Indication arrangements, e.g. displays · CPC title

• F24D2220/2081

  Floor or wall heating panels · CPC title

• H04L12/4625

  Single bridge functionality, e.g. connection of two networks over a single bridge · CPC title

• F24F11/30

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title