Mitsubishi Heavy Industries Thermal Systems Patente

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This control device comprises: an extraction unit that extracts, from time-series data obtained by measuring the indoor temperature of an air-conditioned space, an element included in a monitoring section stretching from a prescribed start condition for air-conditioning control by an air conditioner to an end condition therefor; an estimation unit that estimates, on the basis of the time-series data of the monitoring section, a time constant estimation value and a dead time estimation value of a primary delay response of the air-conditioning control; and a learning unit that learns a lookup table in which an explanatory variable, which is a condition affecting the air conditioning of the air-conditioned space, is associated with the dead time estimation value and the time constant estimation value.

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This indoor air conditioner comprises: a casing that has an inlet and an air outlet; a cross-flow fan that is provided in the casing, and that by being rotationally driven about an axis which extends horizontally takes in air through the inlet and blows air toward the air outlet; a heat exchanger that is provided in the casing and that is provided so as to surround the axis of the cross-flow fan from the outer peripheral side; and a leakage-detecting sensor that is provided below the heat exchanger inside the casing, wherein the leakage-detecting sensor is provided at a position differing from that of an air path through which airflow from the cross-flow fan flows.

This air conditioner comprises: a refrigeration cycle having an outdoor heat exchanger, an indoor heat exchanger, a compressor, and an expansion valve, through each of which a refrigerant circulates in the stated order; a four-way valve capable of performing a warming operation and a cooling operation by switching the direction of refrigerant flow; a liquid/gas heat exchanger capable of exchanging heat between low-pressure-side gas refrigerant and high-pressure-side liquid refrigerant; and a switching unit for guiding the liquid refrigerant to the liquid/gas heat exchanger in either the warming operation or the cooling operation. The liquid/gas heat exchanger has a storage space in which the circulating liquid refrigerant is stored.

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This scroll compressor is provided with a resonance unit (90) that attenuates vibration of a prescribed frequency generated by a refrigerant gas compressed by a fixed scroll and an orbiting scroll. A center-side compression chamber (20A) that communicates with a discharge port (21C) formed on an end plate of a fixed scroll is formed between a spiral wrap (21B) of the fixed scroll and a spiral wrap (22B) of the orbiting scroll. A back-side compression chamber (20B) adjacent to the center-side compression chamber (20A) is formed between the back side of the spiral wrap (21B) and the ventral side of the spiral wrap (22B), a ventral-side compression chamber (20C) adjacent to the center-side compression chamber (20A) is formed between the ventral side of the spiral wrap (21B) and the back side of the spiral wrap (22B), and the refrigerant gas is guided to the resonance unit (90) from the ventral-side compression chamber (20C) in a state in which the refrigerant gas compressed in the center-side compression chamber (20A) flows into the ventral-side compression chamber (20C) via the discharge port (21C).

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The present invention provides on-timer operation which makes it possible to achieve both comfort and low power consumption. Provided is a control system for controlling an air conditioner, said control system comprising: a setting reception unit which receives settings for a target temperature and a specified time when the target temperature should be achieved; an optimal operation calculation unit which calculates time-series air conditioning capacity of the air conditioner such that power used by the air conditioner to achieve the target temperature at the specified time is minimized; and a control unit which operates the air conditioner on the basis of the time-series air conditioning capacity

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Provided are: a control device capable of ascertaining the flow rate of a fluid to be heat-exchanged while suppressing an increase in cost of the refrigeration cycle device; a refrigeration cycle device provided with the same, a refrigeration cycle system provided with the same; a control method; and a control program. A control device (5) of a refrigeration cycle device (2) comprises: a temperature acquisition unit (51) that acquires the temperature of a fluid to be heat-exchanged; a pressure acquisition unit (51) that acquires a plurality of pressures of the fluid to be heat-exchanged flowing through a heat exchanger (HE); a setting information acquisition unit (52) that acquires the type and concentration of the fluid to be heat-exchanged; a physical property value calculation unit (53) that calculates the density and the kinematic viscosity of the fluid to be heat-exchanged; and a flow rate calculation unit (54) that calculates the differential pressure of each pressure of the fluid to be heat-exchanged and calculates the flow rate of the fluid to be heat-exchanged by using the density, kinematic viscosity, and differential pressure of the fluid to be heat-exchanged with respect to a flow rate calculation formula that includes the density, kinematic viscosity, and differential pressure as parameters.

Provided are a control device capable of detecting the erroneous input of a freezing temperature by a user, a refrigeration cycle device comprising the same, a refrigeration cycle system comprising the same, a control method, and a control program. This control device (5) is for a refrigeration cycle device (2) that supplies a heat-exchange fluid having a desired temperature by causing heat exchange between a refrigerant and the heat-exchange fluid in a heat exchanger HE. The control device comprises: a setting information acquisition unit (52) that acquires setting information, which includes the type and concentration of the heat-exchange fluid, and a set freezing temperature, which is a freezing temperature for the heat-exchange fluid that is set by the user; a freezing temperature calculation unit (58) that uses the setting information to calculate a calculated freezing temperature, which is the freezing temperature of the heat-exchange fluid; and an erroneous input detection unit (59a) that detects an erroneous input by the user by determining whether or not the difference between the set freezing temperature and the calculated freezing temperature is greater than or equal to a predetermined value.

A heat exchanger includes a plurality of flat tubes through which a refrigerant flows and a plurality of fins that include a plurality of inserted parts inserted into intervals between the flat tubes and a communication connection part connecting the plurality of inserted parts and that are arrayed at an interval in a fin layering direction intersecting an air blowing direction and an up-down direction. The fins each include a fin body and a drainage part that is provided at a position offset to one side of the inserted part in the air blowing direction and is formed of an inclined part that forms an opening by extending in the fin layering direction and a pair of connection pieces that connect both end edges of the inclined part in the up-down direction with the fin body.

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The purpose of the outdoor unit according to the present disclosure is to reduce noise. The outdoor unit comprises: heat exchangers (20) that each have a first upright section (21) which stands upright, a second upright section (22) which bends from an end on one side in the horizontal direction of the first upright section (21) and extends in a prescribed direction, and a third upright section (23) which bends from the end on the other side in the horizontal direction of the first upright section (21), extends in the prescribed direction, and is shorter in length in the prescribed direction than the second upright section (22), the heat exchangers (20) each having an internal space (S) formed between the first upright section (21), the second upright section (22), and the third upright section (23), and exchanging heat between a refrigerant flowing through the inside of a heat transfer pipe and the air flowing into the internal space (S); an axial flow fan that rotates about a central axis (C) extending in the vertical direction, and guides the air, which has passed through the heat exchangers (20) and flowed into the internal spaces (S), upward; and a partition plate (40) that is provided on the third upright section (23) side of the internal space (S) such that the plate surface intersects the circumferential direction based on the central axis (C).

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a cylindrical housing (11) extending in an axial direction (Da) and in which an opening (19) is formed in a side wall surface of the housing (11); a suction pipe (18) which allows a refrigerant to be suctioned into the housing (11); and a discharging pipe (50) which allows the refrigerant compressed by a scroll compression unit (30) in the housing (11) to be discharged to the outside of the housing (11). The discharging pipe (50) includes a discharging pipe main body (51) having a linear shape passing through the opening (19) so as to be extended in a radial direction (Dr) outward the housing (11) from an inside thereof. An inner peripheral surface of the opening (19) is separated from an opening facing portion (51d) facing the inner peripheral surface in an outer peripheral surface of the discharging pipe main body (51).

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This compression system comprises: a casing; a compressor including a first compression unit that is provided in the casing, that generates an intermediate-pressure refrigerant by compressing a low-pressure refrigerant supplied from outside, and that discharges the intermediate-pressure refrigerant into the casing, and a second compression unit that is provided in the casing, that is set to have a smaller displacement amount than the first compression unit, and that further compresses the intermediate-pressure refrigerant in the casing to generate a high-pressure refrigerant; an evaporator that evaporates the refrigerant that has passed through the compressor, a suction pipe that supplies the low-pressure refrigerant that has passed through the evaporator into the casing; a discharge pipe that discharges the high-pressure refrigerant to the outside of the casing; a bypass pipe that returns the intermediate-pressure refrigerant in the casing to the suction pipe between the evaporator and the first compression unit; and a valve that is provided to the bypass pipe.

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