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 Dehumidifying systemUSPTO Application #: 20070277540Title: Dehumidifying system Abstract: A system dehumidifies a non-environmentally controlled, enclosed space of a building, for example a crawlspace, using a dehumidifier unit comprising an evaporator coil, a condenser coil, and a compressor arranged for circulating heat exchanger fluid through the coils. A fan operates in series with closed loop ducting to communicate air from the space to the dehumidifier unit and back to the space independently of an HVAC system of the building. The fan and dehumidifier unit are responsive to a dehumidistat. A distributed outlet distributes air from the unit to peripheral positions about the space. A heater is coupled in series with the ducting for heating air circulated therethrough. (end of abstract)
Agent: Ade & Company Inc. - Winnipeg, MB, US Inventor: Joao Pascoa Fernandes USPTO Applicaton #: 20070277540 - Class: 621761 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20070277540. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001]This application claims the benefit under 35 U.S.C.119(e) of U.S. provisional application Ser. No. 60/808,978, filed May 30, 2006. FIELD OF THE INVENTION [0002]The present invention relates to a system for dehumidifying and more particularly relates to a system for dehumidifying enclosed spaces, for example crawlspaces or attics in buildings and the like. BACKGROUND [0003]In various enclosed spaces, in building and the like excessive moisture build-up or humidity in the air can cause undesirable growths of mold, bacteria or various undesirable microbes. Accordingly it is desirable to remove moisture from such enclosed building spaces. [0004]Small stand alone units are known for dehumidifying in which a dehumidistat, a fan for circulating air and coils of a condenser and evaporator cycle are provided on a common housing, however, such units typically have a limited capacity to remove moisture, are ineffective at circulating air through a large space, and have no on-going monitoring ability. [0005]U.S. Pat. No. 6,826,920 belonging to Wacker and US Application Publication No. 2006/0086112 belonging to Bloemer et al each disclose systems for controlling humidity, however neither includes its own fan, but rather requires operation in conjunction with the air handler of an HVAC environmental control system of the building. [0006]US Application Publication No. 2005/0005616 belonging to Bates et al discloses a fungus abatement system for a lower enclosed space in a building. The system is an open loop system which draws air from the space at plural locations and exhausts the air externally from the building. Such a system is not well suited for use in colder environments due to the resulting heat loss of repeatedly exhausting air which is heated in the space by convection or conduction. Furthermore, the system is not effective for dehumidification in environments where the air drawn back into the space is also humid. SUMMARY OF THE INVENTION [0007]According to one aspect of the invention there is provided a dehumidifying system for dehumidifying a space of a building, the system comprising: [0008]a dehumidifier unit comprising an evaporator coil, a condenser coil, and a compressor arranged for circulating heat exchanger fluid through the coils; [0009]ducting arranged for communicating from the space to an inlet of the dehumidifier unit and for communicating from an outlet of the dehumidifier unit to the space; [0010]a fan arranged for circulating air through the ducting between the space and the dehumidifier unit; [0011]a dehumidistat arranged for communication with airflow from the space to the dehumidifier unit to measure a humidity level of air in the space, the dehumidistat having a set point humidity level and being arranged for activating the dehumidifier unit responsive to the humidity level in the space exceeding the set point humidity level. [0012]By providing a system in which ducting communicates a dehumidifier unit to a space to be dehumidified, a fan can circulate the air thoroughly throughout the space in a closed loop configuration with the space so that all humid air can be brought into contact with the dehumidifier unit for dehumidification. Supporting the dehumidistat in communication with the air being circulated ensures that the system operates in the most efficient manner. [0013]When the system is provided in combination with a building including a controlled space in communication with an air handler of an environmental control system of the controlled space and an uncontrolled space, the ducting is preferably arranged in communication with the uncontrolled space independently of the air handler. The dehumidifying system is thus well suited as an add-on to a building already having an HVAC system in which the dehumidifying system communicates with a crawlspace or basement area independently of the HVAC system. [0014]The dehumidifier unit may be supported in the controlled space of the building and arranged to communicate with the uncontrolled space of the building. [0015]There may be provided a single common intake arranged to be supported centrally in the space, the ducting communicating between the common intake and the inlet of the dehumidifier unit. [0016]Furthermore, there may be provided a distributed outlet arranged to be supported in the space for communication with the space at a plurality of positions spaced generally about a periphery of the space, the ducting communicating between the outlet of the dehumidifier and the distributed outlet. The distributed outlet acts as a manifold to ensure that dried air, from which the dehumidifier has removed moisture, is thoroughly spread through the space to be dehumidified. Accordingly a greater amount of moisture remaining in the space can be collected by the drier air and drawn towards the common intake which is preferably centrally located in relation to the peripherally distributed outlet. [0017]The inlet and the outlet of the dehumidifier are preferably arranged to communicate with the space in a closed loop configuration. [0018]Both the fan and the compressor may be operated simultaneously responsive to the dehumidistat and a timer. [0019]The fan may also be responsive to a timer to circulate air periodically through the space independently of the operation of the dehumidifier unit to ensure accurate moisture determination by the dehumidistat. [0020]In some instances, both the fan and the compressor may be responsive to a timer to periodically circulate and dehumidify air within the space. [0021]There may also be provided a heater for heating the space, which is preferably coupled in series with the ducting for heating air circulated therethrough. Continue reading... Full patent description for Dehumidifying system Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Dehumidifying system patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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