Daikin Europe Patente

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An air conditioning system (100) comprises a refrigerant circuit (40) and an electrical circuit (50). The refrigerant circuit (40) includes an indoor heat exchanger (23), an outdoor heat exchanger (13), a compressor (11), a refrigerant pipe (171), a first pressure stat (181), and a second pressure stat (182). The refrigerant pipe (171) is connected to the compressor (11) and forming at least part of the refrigerant circuit (40). The first pressure stat (181) is configured to detect pressure of the refrigerant in the refrigerant pipe (171). The second pressure stat (182) is configured to detect the pressure of the refrigerant in the refrigerant pipe (171). The electrical circuit (50) is configured to drive the refrigerant circuit (40). The first pressure stat (181) includes a first pressure sensor (630) and a first electrical switch (640). The first pressure sensor (630) has a first pressure threshold. The first electrical switch (640) is configured to stop the electrical circuit (50) from driving the refrigerant circuit (40) at least partially in accordance with the pressure detected by the first pressure sensor (630). The second pressure stat (182) includes a second pressure sensor (730) and a second electrical switch (740). The second pressure sensor (730) has a second pressure threshold. The second electrical switch (740) is configured to stop the electrical circuit (50) from driving the refrigerant circuit (40) at least partially in accordance with the pressure detected by the second pressure sensor (730). The first pressure threshold is different from the second pressure threshold.

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Provided is an air-conditioning and warm water supply unit in which a fluid is sent from a heat exchanger, which is configured to transfer heat from the refrigerant to the fluid, alternatively to either one of an air conditioner and a warm water supply tank, wherein it is possible to easily discover whether the cause of an abnormality of the flow rate of the fluid is present on the air conditioner side or on the warm water supply tank side. An air-conditioning and warm water supply unit (100) is provided with a usage-side heat exchanger (20) configured to transfer heat from a refrigerant to a fluid, a warm water supply tank (70) in which water is heated by the heat of the fluid, a switching mechanism (80) configured to switch between a first state in which the fluid flows from the usage-side heat exchanger to an air conditioner (430) and a second state in which flows from the usage-side heat exchanger to the warm water supply tank, a flow sensor (60) configured to detect the flow rate of the fluid, and a control unit (90). The control unit determines that the flow rate is abnormal when the flow rate detected by the flow sensor is in a predetermined range, confirms whether the switching mechanism is in the first state or the second state, assesses whether the abnormal flow rate occurs while the fluid is flowing to the air conditioner or while the fluid is flowing to the warm water supply tank, and outputs the assessment result.

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Heat exchanger unit (1) comprising a casing (2) defining a duct to be flown through by a fluid, a fan (20) disposed in the casing (2) and configured to induce a flow of the fluid through the duct in a flow direction (F), a heat exchanger (5) being V-shaped in side view with an apex (8) at one end and an opening (12) at the opposite end, the heat exchanger (5) being disposed in the duct with the opening (12) directed towards the flow direction (F), wherein a line (CL) passing the apex (8) of the V-shaped heat exchanger (5) in the side view extends horizontally, wherein the fan (20) is disposed downstream of the heat exchanger (5) in the flow direction (F).

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1. Air conditioner for conditioning a space (72) inside a building (70) comprising: a heat source unit (30) having a heat exchanger unit (31) comprising a first heat exchanger (5) disposed in a first casing (2) and configured to exchange heat with a heat source and a compressor unit (32) comprising a compressor (37) disposed in a second casing (44) separate from the first casing, the heat exchanger unit and the compressor unit being fluidly connected via a first liquid refrigerant pipe (78) and a first gaseous refrigerant pipe (76); and at least one indoor unit (50) having a second heat exchanger (53) configured to exchange heat with the space to be conditioned and being fluidly communicated to the heat exchanger unit and/or the compressor unit via a second liquid refrigerant pipe (79) and a second gaseous refrigerant pipe (77), wherein the outer diameter of the first liquid refrigerant pipe is larger than the outer diameter of the second liquid refrigerant pipe and/or the outer diameter of the first gaseous refrigerant pipe is larger than the outer diameter of the second gaseous refrigerant pipe.

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