JP-7855058-B2 - Refrigeration cycle equipment

JP7855058B2JP 7855058 B2JP7855058 B2JP 7855058B2JP-7855058-B2

Inventors

山野善生
秋月隆宏
門脇仁隆
伊藤拓也

Assignees

三菱電機株式会社

Dates

Publication Date: 20260507
Application Date: 20220329

Claims (9)

A condenser having corrugated fins, The system includes a sprinkler for sprinkling water onto the condenser, The droplet diameter of the water sprayed by the aforementioned watering device is 160 μm or less. The aforementioned sprinkler device is Multiple first nozzles are provided, and a first pipe extends in a first direction, Multiple second nozzles are provided, and a second pipe extends in the first direction, The device is provided with a plurality of third nozzles and a third pipe extending in a second direction perpendicular to the first direction, The first and second pipes are positioned opposite each other below the third pipe. One end of the third pipe is connected to the first pipe, and the other end is connected to the second pipe. The aforementioned plurality of third nozzles spray water upward onto the condenser. A refrigeration cycle device in which the plurality of first nozzles and the plurality of second nozzles spray water toward the center of the condenser.
The refrigeration cycle apparatus according to claim 1 , wherein the amount of water sprayed per unit area of the sprinkler is 1.2 ± 0.2 L/(min· m² ).
The refrigeration cycle apparatus according to claim 1 or 2 , wherein the plurality of first nozzles and the plurality of second nozzles are installed at different angles according to the wind speed distribution of the air flowing into the condenser.
The refrigeration cycle apparatus according to claim 3, wherein the angles of the first and second nozzles with respect to the second direction, which spray water onto the portion of the plurality of first nozzles and the plurality of second nozzles in which the air velocity of the air flowing into the condenser is relatively high, are greater than the angles of the first and second nozzles with respect to the second direction, which spray water onto the portion of the plurality of first nozzles and the plurality of second nozzles in which the air velocity is relatively low.
The refrigeration cycle apparatus according to any one of claims 1 to 4 , wherein the number of the plurality of third nozzles is greater than the number of the plurality of first nozzles and greater than the number of the plurality of second nozzles.
The refrigeration cycle apparatus according to any one of claims 1 to 5 , wherein the amount of water sprayed by the plurality of first nozzles and the amount of water sprayed by the plurality of second nozzles are different.
The refrigeration cycle apparatus according to any one of claims 1 to 6 , wherein the third piping is located below the upper end of the condenser.
The amount of water sprayed per unit area of the sprinkler device varies according to the temperature distribution of the condenser, as described in any one of claims 1 to 7 .
The refrigeration cycle apparatus according to claim 8 , wherein the amount of water sprayed per unit area in the part of the condenser where the temperature is relatively high is greater than the amount of water sprayed per unit area in the part of the condenser where the temperature is relatively low.

Description

This disclosure relates to a refrigeration cycle system that sprays water onto a condenser. In refrigeration cycle systems, it is known that when the outside air temperature is high, water is sprayed onto the condenser of the outdoor unit, and the condenser is cooled by the heat of vaporization of the water, thereby improving the condensation capacity of the refrigerant. For example, Patent Document 1 discloses a spraying device equipped with multiple spray nozzles for spraying water onto a heat exchanger having plate fins. In Patent Document 1, multiple spray nozzles are arranged in front of the heat exchanger, and a mist of water is sprayed during cooling operation when the heat exchanger functions as a condenser. Patent No. 5880019 This is a schematic diagram of the refrigeration cycle device according to Embodiment 1.This is a schematic diagram of the outdoor heat exchanger according to Embodiment 1.This is a schematic diagram of the sprinkler system for a refrigeration cycle system according to Embodiment 1.This graph shows the relationship between the amount of water sprayed per unit area and the COP improvement rate for each droplet size in a heat exchanger with corrugated fins.This is a side view of the heat source unit of the refrigeration cycle device according to Embodiment 2.This figure shows the temperature distribution of the outdoor heat exchanger when the outdoor heat exchanger according to Embodiment 2 functions as a condenser.This is a schematic diagram of the watering device for a refrigeration cycle system according to Embodiment 2.This diagram illustrates the installation angle of the third nozzle of the third pipe according to Embodiment 2.This diagram illustrates the installation angles of the first nozzle and the second nozzle of the first and second pipes according to Embodiment 2.This diagram illustrates the installation angles of the first nozzle and the second nozzle of the first and second pipes according to Embodiment 2.This diagram illustrates the installation angles of the first nozzle and the second nozzle of the first and second pipes according to Embodiment 2.This diagram shows an example of a connected arrangement of heat source units.This is a schematic diagram of the sprinkler system according to Embodiment 3. The embodiments will be described below with reference to the drawings. In each drawing, components with the same reference numerals are the same or equivalent components, and this is consistent throughout the entire specification. Furthermore, the configurations of the components shown in the entire specification are merely examples and are not exhaustive. Additionally, the size relationships of the components in the following drawings may differ from those of the actual components. Embodiment 1. (Configuration of the refrigeration cycle system) Figure 1 is a schematic diagram of the refrigeration cycle device 100 according to Embodiment 1. The refrigeration cycle device 100 of Embodiment 1 is a heat pump chiller that performs air conditioning using chilled and hot water. As shown in Figure 1, the refrigeration cycle device 100 comprises a heat source unit 1, an indoor unit 2, and a control device 3. The heat source unit 1 of this embodiment has four refrigerant circuits. Two refrigerant circuits form a group and share one water heat exchanger 60. The heat source unit 1 of this embodiment has two groups of two refrigerant circuits. The two water heat exchangers 60 are connected in series by piping and cool or heat the water, which is the heat transfer medium, in two stages. As shown in Figure 1, in this embodiment, the refrigerant circuits of each system of the heat source unit 1 are configured by connecting a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, an expansion valve 14, a water heat exchanger 60, and an accumulator 15 with piping. As the refrigerant, for example, a single refrigerant such as R-22 or R-134a, a pseudo-azeotropic mixed refrigerant such as R-410A or R-404A, or a non-azeotropic mixed refrigerant such as R-407C can be used. In addition, refrigerants or mixtures thereof that contain a double bond in their chemical formula and are considered to have a relatively low global warming potential, such as CF₃CF = CH₂ , or natural refrigerants such as CO₂ or propane can be used. The compressor 11 compresses and discharges the inhaled refrigerant. The compressor 11 is driven via a compressor inverter drive device (not shown) or the like. Based on instructions from the control device 3, the compressor 11 can change its capacity, which is the amount of refrigerant delivered per unit time, by arbitrarily changing the drive frequency. Furthermore, the four-way valve 12, which acts as a flow path switching device, switches the flow of refrigerant depending on the operation being performed, based on instructions from the control device 3. For example, during cooling operation, the four-way valve 12 directs the high-temperature, high-pressur