Air-conditioning management apparatus and air-conditioning system

Patent metadata

Field	Value
Publication number	US-11499740-B2
Application number	US-201817051277-A
Country	US
Kind code	B2
Filing date	Jun 26, 2018
Priority date	Jun 26, 2018
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

An air-conditioning management apparatus includes: a storage unit that stores a schedule including a set time and a set temperature; a communication processing unit that communicates with the air-conditioning apparatus and receives operation status information including a heat medium temperature; and a controller that performs a schedule control to control the air-conditioning apparatus according to the schedule. The schedule control includes an optimal start-up control to control the air-conditioning apparatus such that an indoor space temperature reaches the set temperature at the set time, by starting an operation of the air-conditioning apparatus before the set time. The controller performs a preheating control or a precooling control to control the heat source unit such that before the optimal start-up control is started, the heat medium temperature included in the operation status information obtained from the air-conditioning apparatus falls within a target range including a previously set target heat medium temperature.

First claim

The invention claimed is:

1. An air-conditioning management apparatus that controls an air-conditioning apparatus that comprises:
a heat source unit;
one or more indoor units; and
a refrigerant-heat-medium heat exchanger configured to cause heat exchange to be performed between refrigerant that flows in the heat source unit and a heat medium that flows in the one or more indoor units to heat or cool the heat medium and heat or cool an indoor space,
the air-conditioning management apparatus comprising:
a storage unit configured to store a schedule including a set time and a set temperature;
a communication processing unit configured to communicate with the air-conditioning apparatus and receive operation status information including a heat medium temperature that is a temperature of the heat medium; and
a controller configured to perform a schedule control to control the air-conditioning apparatus according to the schedule, wherein
the schedule control includes an optimal start-up control to control the air-conditioning apparatus such that an indoor space temperature that is a temperature of the indoor space reaches the set temperature at the set time, by starting an operation of the air-conditioning apparatus before the set time,
the controller performs a preheating control or a precooling control to control the heat source unit such that before the optimal start-up control is started, the heat medium temperature included in the operation status information obtained from the air-conditioning apparatus falls within a target range including a previously set target heat medium temperature,
the storage unit stores a calculation formula or a table prepared to calculate a required time required for the preheating control or the precooling control based on the heat medium temperature, a heat medium flow rate that is a flow rate of the heat medium, the target heat medium temperature, and an outside air temperature,
the operation status information includes the heat medium flow rate and the outside air temperature, and
the controller performs the preheating control or the precooling control for the required time calculated based on the operation status information received by the communication processing unit and the calculation formula or the table stored in the storage unit.

2. The air-conditioning management apparatus of claim 1 , wherein
each of the one or more indoor units includes a flow control valve configured to adjust a flow rate of the heat medium that flows into the indoor unit itself, the flow control valve being adjusted in opening degree to adjust the indoor space temperature, and
the controller transmits a command to adjust the opening degree of the flow control valve to the one or more indoor units at the same timing, when the optimal start-up control is performed.

3. The air-conditioning management apparatus of claim 1 , wherein
the controller starts the preheating control or the precooling control at a time that is earlier than the set time by a previously set schedule control period, and
when the air-conditioning apparatus comprises a plurality of indoor units, the storage unit stores as schedules, a schedule for each indoor unit, including as set times, a set time for each indoor unit, and a set temperature; and
when the set times in the schedules that are made out for the plurality of indoor units differ from each other, the controller
starts the schedule control by using an earliest set time as a set time at which start time of the preheating control or the precooling control is determined, and
individually performs the optimal start-up control of the plurality of indoor units according to the set times for the one or more indoor units.

4. An air-conditioning system comprising:
the air-conditioning management apparatus of claim 1 ; and
the air-conditioning apparatus.

5. An air-conditioning management apparatus that controls an air-conditioning apparatus that comprises:
a heat source unit;
a plurality of indoor units; and
a refrigerant-heat-medium heat exchanger configured to cause heat exchange to be performed between refrigerant that flows in the heat source unit and a heat medium that flows in the plurality of indoor units to heat or cool the heat medium and heat or cool an indoor space of each of the plurality of indoor units,
the air-conditioning management apparatus comprising:
a storage unit configured to store as schedules, a schedule for each of the plurality of indoor units, including as set times, a set time for each of the plurality of indoor units, and a set temperature;
a communication processing unit configured to communicate with the air-conditioning apparatus and receive operation status information including a heat medium temperature that is a temperature of the heat medium; and
a controller configured to perform a schedule control to control the air-conditioning apparatus according to the schedules,
wherein the schedule control includes an optimal start-up control to control the air-conditioning apparatus such that a temperature of each indoor space of the plurality of indoor units reaches the set temperature at one of the set times, by starting an operation of the air-conditioning apparatus before the one of the set times,
the controller performs a preheating control or a precooling control to control the heat source unit such that before the optimal start-up control is started, the heat medium temperature included in the operation status information obtained from the air-conditioning apparatus falls within a target range including a previously set target heat medium temperature,
when the set times in the schedules that are made out for the plurality of indoor units are different from each other, the optimal start-up control is performed such that a suction temperature of each of the plurality of indoor units reaches the set temperature at the one of the set times, which is an earliest one of the set times.

6. The air-conditioning management apparatus of claim 5 , wherein
the storage unit stores a calculation formula or a table prepared to calculate a required time required for the preheating control or the precooling control based on the heat medium temperature, a heat medium flow rate that is a flow rate of the heat medium, the target heat medium temperature, and an outside air temperature,
the operation status information includes the heat medium flow rate and the outside air temperature, and
the controller performs the preheating control or the precooling control for the required time calculated based on the operation status information received by the communication processing unit and the calculation formula or the table stored in the storage unit.

7. The air-conditioning management apparatus of claim 5 , wherein
the controller starts the preheating control or the precooling control at a time that is earlier than the one of the set times, which is the earliest one of the set times, by a previously set schedule control period, and
when the set times in the schedules made out for the plurality of indoor units differ from each other, the controller starts the schedule control by using the one of the set times, which is the earliest one of the set times, in determining a start time of the preheating control or the precooling control.

8. An air-conditioning management apparatus that controls an air-conditioning apparatus that comprises:
a heat source unit;
a plurality of indoor units; and
a refrigerant-heat-medium heat exchanger configured to cause heat exchange to be performed between refrigerant that flows in the heat source unit and a heat medium that flows in the plurality of indoor units to heat or cool the heat medium and heat or cool an indoor space of each of the plura

Assignees

• Mitsubishi Electric Corp

Inventors

• Hashimoto Yosuke

Classifications

• F24F11/64 Primary

  using pre-stored data · CPC title

• F24F11/48

  prior to normal operation, e.g. pre-heating or pre-cooling · CPC title

• F24F2203/104

  Heat exchanger wheel · CPC title

• F24F2110/10

  Temperature · CPC title

• F24F11/61

  using timers · CPC title