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US 11,674,695 B2Granted
Hot water supply apparatus
AssigneeDaikin Industries, Ltd.
InventorsHideho Sakaguchi, Atsushi Okamoto, Masanori Ukibune, Yasuhiro Kouno, Yurika Gotou, Qi Fang, Tim Coessens
Life of this patent
Estimating the term…
Abstract
A controller performs a first operation in which a heat source device directly or indirectly heats water in a first channel of a heat exchanger and a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger after the first operation ends.
Claims20
A hot water supply apparatus, comprising:
- a heat source device;
- a tank configured to store water;
- a water circuit through which the water in the tank circulates;
- a heat exchanger having a first channel connected to the water circuit;
- and
- a controller configured to control the heat source device and the water circuit, wherein
- the controller is configured to perform:
- a first operation in which the heat source device directly or indirectly heats the water in the first channel of the heat exchanger;
- and
- a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger to a temperature which is lower than or equal to a temperature at which scale precipitates after the first operation ends, and
- the controller is configured to perform a first determination of whether to perform the second operation according to an amount of scale in the water circuit in the course of the first operation.
8 more elements
A hot water supply apparatus, comprising:
- a heat source device;
- a tank configured to store water;
- a water circuit through which the water in the tank circulates;
- a heat exchanger having a first channel connected to the water circuit;
- and
- a controller configured to control the heat source device and the water circuit, wherein
- the controller is configured to perform:
- a first operation in which the heat source device directly or indirectly heats the water in the first channel of the heat exchanger;
- and
- a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger after the first operation ends,
- the controller is configured to perform a first determination of whether to perform the second operation according to an amount of scale in the water circuit in the course of the first operation,
- the controller is configured to determine in the first determination whether to perform the second operation based on at least an integrated value of an operation time of the first operation, and
- the controller is configured to perform the second operation when it is determined in the first determination that an integrated value, which is based on the operation time of the first operation, a temperature of the water in the water circuit, and a pressure of the water in the water circuit, exceeds a predetermined value.
10 more elements
A hot water supply apparatus, comprising:
- a heat source device;
- a tank configured to store water;
- a water circuit through which the water in the tank circulates;
- a heat exchanger having a first channel connected to the water circuit;
- and
- a controller configured to control the heat source device and the water circuit, wherein
- the controller is configured to perform:
- a first operation in which the heat source device directly or indirectly heats the water in the first channel of the heat exchanger;
- and
- a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger to a temperature which is lower than or equal to a temperature at which scale precipitates after the first operation ends, and
- the controller is configured to perform a second determination of whether to end the second operation according to an amount of scale in the water circuit in the course of the second operation.
8 more elements
A hot water supply apparatus, comprising:
- a heat source device;
- a tank configured to store water;
- a water circuit through which the water in the tank circulates;
- a heat exchanger having a first channel connected to the water circuit;
- and
- a controller configured to control the heat source device and the water circuit, wherein the controller is configured to perform:
- a first operation in which the heat source device directly or indirectly heats the water in the first channel of the heat exchanger;
- and
- a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger after the first operation ends,
- the controller is configured to perform a second determination of whether to end the second operation according to an amount of scale in the water circuit in the course of the second operation,
- the controller is configured to determine in the second determination whether to end the second operation based on at least an operation time of the second operation, and
- the controller is configured to end the second operation when it is determined in the second determination that a value, which is based on the operation time of the second operation, a temperature of the water in the water circuit, and a pressure of the water in the water circuit, falls below a predetermined value.
9 more elements
A hot water supply apparatus, comprising:
- a heat source device;
- a tank configured to store water;
- a water circuit through which the water in the tank circulates;
- a heat exchanger having a first channel connected to the water circuit;
- and
- a controller configured to control the heat source device and the water circuit, wherein
- the controller is configured to perform:
- a first operation in which the heat source device directly or indirectly heats the water in the first channel of the heat exchanger;
- and
- a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger to a temperature which is lower than or equal to a temperature at which scale precipitates after the first operation ends,
- the controller is configured to perform a first determination of whether to perform the second operation according to an amount of scale in the water circuit in the course of the first operation, and
- the hot water supply apparatus further includes a supply unit configured to supply low-temperature water to the first channel of the heat exchanger in the second operation.
9 more elements
A hot water supply apparatus, comprising:
- a heat source device;
- a tank configured to store water;
- a water circuit through which the water in the tank circulates;
- a heat exchanger having a first channel connected to the water circuit;
- and
- a controller configured to control the heat source device and the water circuit, wherein
- the controller is configured to perform:
- a first operation in which the heat source device directly or indirectly heats the water in the first channel of the heat exchanger;
- and
- a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger after the first operation ends,
- the controller is configured to perform a first determination of whether to perform the second operation according to an amount of scale in the water circuit in the course of the first operation,
- the water circuit has a first pump that circulates the water in the water circuit,
- the controller is configured to operate the first pump in the second operation, and
- the water circuit includes a channel changing section that returns the water cooled in the first channel of the heat exchanger to one of portions having different water temperatures in the tank according to a temperature of the water in the water circuit in the second operation.
11 more elements
Dependencies are inferred from the claim text.