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Apparatus and a system for controlling temperature in a plurality of zones in a building

  • US 9,163,844 B2
  • Filed: 07/16/2009
  • Issued: 10/20/2015
  • Est. Priority Date: 07/16/2008
  • Status: Expired due to Fees
First Claim
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1. Apparatus for controlling temperature in a plurality of zones in a building, the apparatus comprising:

  • a housing defining a hollow interior region and comprising;

    a plurality of inlet ports located in the housing and communicating with the hollow interior region of the housing, the inlet ports being adapted for connecting to respective return ducts communicating with the respective zones, and for receiving return air therethrough returned through the respective return ducts from the respective zones and for accommodating the return air to the hollow interior region,a plurality of outlet ports located in the housing and communicating with the hollow interior region of the housing, the outlet ports being adapted for connecting to respective flow ducts communicating with the respective zones, and for accommodating flow air therethrough from the hollow interior region for delivery through the flow ducts to the respective zones,an air circulating means located in the hollow interior region of the housing for circulating air through the hollow interior region from the inlet ports to the outlet ports,a heat exchange means located in the hollow interior region of the housing,a plurality of mutually isolated heat exchange paths formed in the hollow interior region of the housing extending through the heat exchange means and terminating in the respective outlet ports of the housing for accommodating the flow air therethrough from the air circulating means to the outlet ports,a plurality of mutually isolated bypass paths corresponding to the respective heat exchange paths and terminating in the respective outlet ports for accommodating the flow air from the air circulating means to the corresponding respective outlet ports with the flow air bypassing the corresponding ones of the heat exchange paths,a plurality of return air temperature sensing means located in the housing adjacent the respective inlet ports for sensing the temperature of the return air from the respective zones, anda plurality of primary valve means corresponding to the respective heat exchange paths, each primary valve means having only a single primary air flap located between the air circulating means and the heat exchange means adjacent the corresponding one of the heat exchange paths and the corresponding one of the bypass paths and being selectively operable in either one of a first state and a second state for selectively directing the flow air from the air circulating means to the corresponding one of the outlet ports through either the corresponding one of the heat exchange paths or the corresponding one of the bypass paths in response to the temperature of the return air from the corresponding one of the respective zones sensed by the corresponding return air temperature sensing means.

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