Portable air conditioner and control method

Patent metadata

Field	Value
Publication number	US-11739969-B2
Application number	US-201816650838-A
Country	US
Kind code	B2
Filing date	Sep 25, 2018
Priority date	Sep 25, 2017
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A portable conditioner to cool or heat an internal space separate from an external space includes a control and command unit configured to determine at least the enthalpy difference between the internal space and the external space, and to regulate the quantity of air exchanged with the external space in relation to the enthalpy difference determined with respect to an expected value of enthalpy difference corresponding to a conditioning temperature and to a defined conditioning relative humidity. The present invention also concerns a method to regulate the portable conditioner.

First claim

The invention claimed is:

1. A single pipe or double pipe portable conditioner for domestic use to condition spaces, comprising: an external exchanger and an internal exchanger functionally coordinated to cool or to heat an internal space separate from an external space, wherein the internal exchanger is connected to said internal space and said external exchanger is connected to said external space by connection pipes configured to exchange air respectively with said internal space and with said external space, wherein when in a cooling mode the internal exchanger functions as an evaporator and the external exchanger functions as a condenser, and when in a heating mode the internal exchanger functions as the condenser and the external exchanger functions as the evaporator, at least one connection pipe of said external exchanger being provided with a delivery device and/or a suction device able to define a quantity of air exchanged with said external space in order to maintain said internal space at a conditioning temperature and at a conditioning relative humidity predefined by a user, and further comprising a control and command unit configured to determine an enthalpy difference between said internal space and said external space using values of temperature and of humidity of said internal space and said external space, and the control and command unit arranged to command said delivery device and/or said suction device to regulate said quantity of air exchanged with said external space in relation to said enthalpy difference determined with respect to an expected value of enthalpy difference corresponding to said conditioning temperature and to said conditioning relative humidity, and further wherein said control and command unit is configured to command said delivery device and/or said suction device if said acquired temperature and said relative humidity of said external space is different from said conditioning temperature (Tc) and from said conditioning relative humidity for a longer time than a defined threshold time.

2. The portable conditioner as in claim 1 , wherein said control and command unit is configured to reduce said quantity of air supplied to said external space if the temperature of said external space is higher or lower than said conditioning temperature and to increase said quantity of air supplied to said external space if the temperature of said external space is lower or higher than said conditioning temperature, respectively if the cooling mode or the heating mode is active.

3. The portable conditioner as in claim 1 , wherein said control and command unit is configured to reduce said quantity of air supplied to said external space if the relative humidity of said external space is higher or lower than said conditioning relative humidity, and to increase said quantity of air supplied to said external space if the relative humidity of said external space is lower or higher than said conditioning relative humidity, respectively if the cooling mode or the heating mode is active.

4. The portable conditioner as in claim 1 , wherein said control and command unit is configured to receive and send control signals and data measured and/or processed by means of a remote communication system chosen from a group comprising Wi-Fi, internet, Near Field Communication, wireless, Bluetooth and infrared.

5. A method to regulate a portable conditioner for domestic use to condition spaces, comprising: an external exchanger and an internal exchanger functionally coordinated to cool or to heat an internal space separate from an external space, in which said internal exchanger is connected to said internal space and said external exchanger is connected to said external space by means of connection pipes configured to exchange air respectively with said internal space and with said external space, at least one connection pipe of said external exchanger being provided with a delivery device and/or a suction device configured to define, on each occasion, a first quantity of air exchanged with said external space in order to maintain said internal space at a conditioning temperature and at a conditioning relative humidity predefined by a user, wherein said method further comprises:
acquiring values of temperature and of humidity of said internal space and said external space;
calculating an expected value of enthalpy difference corresponding to said conditioning temperature and to said conditioning relative humidity;
determining at least the enthalpy difference between said internal space and said external space;
determining at least said delivery device and/or said suction device to regulate said first quantity of air exchanged with said external space in relation to said enthalpy difference determined with respect to said expected value of enthalpy difference; and
wherein, during use, creating a pressure imbalance between the external space and the internal space;
using the delivery device and/or the suction device to regulate a second quantity of air supplied to the external space thereby promoting or hindering a re-integration of air due the pressure imbalance between the internal space and the external space; and
configuring said control and command unit to command said delivery device and/or said suction device if said acquired temperature and said relative humidity of said external space is different from said conditioning temperature (Tc) and from said conditioning relative humidity for a longer time than a defined threshold time.

6. The method as in claim 5 , including commanding at least said delivery device and/or said suction device to reduce said quantity of air supplied to said external space if the temperature of said external space is higher or lower than said conditioning temperature, and to increase said first quantity of air supplied to said external space if the temperature of said external space is lower or higher than said conditioning temperature, respectively if the cooling mode or the heating mode is active.

7. The method as in claim 5 , including commanding at least said delivery device and/or said suction device in order to reduce said first quantity of air supplied to said external space if the relative humidity of said external space is higher or lower than said conditioning relative humidity, and to increase said first quantity of air supplied to said external space if the relative humidity of said external space is lower or higher than said conditioning relative humidity, respectively if the cooling mode or the heating mode is active.

8. The method as in claim 5 , including commanding at least said delivery device and/or said suction device if said enthalpy difference determined is different from said expected value of enthalpy difference for a longer time than a defined threshold time.

9. The method as in claim 5 , including commanding said delivery device and/or said suction device if said acquired temperature and said acquired relative humidity of said external space is different from said conditioning temperature (Tc) and from said conditioning relative humidity for a longer time than a defined threshold time.

10. The method as in claim 5 , including commanding said delivery device and/or said suction device proportionally to the deviation of said enthalpy difference determined with respect to said expected value of enthalpy difference.

11. The method as in claim 5 , including commanding said delivery device and/or said suction device proportionally to the deviation of said acquired temperature of said external space with respect to said conditioning temperature.

Assignees

• De Longhi Appliances Srl

Inventors

• De' Longhi Giuseppe
• Vit Stefano
• Callegaro Ivano

Classifications

• F24F11/65 Primary

  for selecting an operating mode · CPC title

• F24F5/001

  Compression cycle type · CPC title

• F24F11/72 Primary

  for controlling the supply of treated air, e.g. its pressure · CPC title

• F24F1/022

  comprising a compressor cycle · CPC title

• F24F1/04

  Arrangements for portability · CPC title