WO2023188009A1

WO2023188009A1 - Refrigeration cycle device

Info

Publication number: WO2023188009A1
Application number: PCT/JP2022/015571
Authority: WO
Inventors: 翔一平野; 祐二垂水; 純一宮井; 隆宏秋月; 善生山野; 拓也伊藤
Original assignee: 三菱電機株式会社
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2023-10-05

Abstract

This refrigeration cycle device comprises a condenser and a water sprinkling device that sprinkles water on the condenser, wherein the water sprinkling amount per unit surface area of the water sprinkling device varies in accordance with the temperature distribution of the condenser.

Description

Refrigeration cycle equipment

The present disclosure relates to a refrigeration cycle device that sprinkles water on a condenser.

In a refrigeration cycle device, when the outside air temperature is high, water is sprinkled on the condenser provided in the outdoor unit, and the condenser is cooled by the heat of vaporization of the water, thereby improving the condensing ability of the refrigerant and improving the COP. It has been known. For example, Patent Document 1 discloses an auxiliary cooling device for an air-cooled condenser that includes a spray nozzle section for sprinkling water onto the condenser and a control section controlling the amount of water sprayed by the spray nozzle section.

Japanese Patent Application Publication No. 10-213361

The auxiliary cooling device described in Patent Document 1 is configured to spray fine water particles or mist almost uniformly on the radiation fins of the condenser. However, in the case of a configuration in which water is uniformly sprinkled on the condenser, if the temperature distribution of the refrigerant flowing through the condenser becomes uneven, the cooling effect of the condenser due to water spraying becomes uneven, and the efficiency of COP improvement becomes worse.

The present disclosure solves the above-mentioned problems and provides a refrigeration cycle device that can improve COP through water sprinkling.

The refrigeration cycle device according to the present disclosure includes a condenser and a water sprinkling device that sprinkles water on the condenser, and the amount of water sprinkled per unit area of the water sprinkling device varies depending on the temperature distribution of the condenser.

According to the refrigeration cycle device of the present disclosure, by making the amount of water sprinkled per unit area of the water sprinkler device different depending on the temperature distribution of the condenser, it is possible to improve COP by sprinkling water.

1 is a schematic configuration diagram of a refrigeration cycle device according to Embodiment 1. FIG. 1 is a schematic configuration diagram of an outdoor heat exchanger according to Embodiment 1. FIG. FIG. 3 is a diagram showing the temperature distribution of the outdoor heat exchanger in the case where the outdoor heat exchanger according to the first embodiment functions as a condenser. 1 is a schematic configuration diagram of a water sprinkler device of a refrigeration cycle device according to Embodiment 1. FIG. It is a schematic block diagram of the water sprinkler device of the refrigeration cycle apparatus based on Embodiment 2. It is a schematic block diagram of the water sprinkler device of the refrigeration cycle apparatus based on Embodiment 3.

Hereinafter, embodiments will be described based on the drawings. In each figure, the same reference numerals are the same or equivalent, and this is common throughout the entire specification. Moreover, the forms of the constituent elements shown in the entire specification are merely examples, and the present invention is not limited to these descriptions. Furthermore, in the following drawings, the size relationship of each component may differ from the actual one.

Embodiment 1.
(Configuration of refrigeration cycle device)
FIG. 1 is a schematic configuration diagram of a refrigeration cycle device 100 according to the first embodiment. The refrigeration cycle device 100 of the first embodiment is a heat pump chiller that performs air conditioning using cold and hot water. As shown in FIG. 1, the refrigeration cycle device 100 includes 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. The 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 by piping in series, and cool or heat water, which is a heat medium, in two stages.

As shown in FIG. 1, the refrigerant circuits of each system of the heat source unit 1 of this embodiment include 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. Connect the pipes to form a refrigerant circuit. 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, it is possible to use a refrigerant that contains a double bond in the chemical formula and is said to have a relatively low global warming potential, such as CF ₃ CF=CH ₂ , or a mixture thereof, or a natural refrigerant such as CO ₂ or propane. can.

The compressor 11 compresses and discharges the sucked refrigerant. The compressor 11 is driven via a compressor inverter drive device (not shown) or the like. The compressor 11 can change the capacity of the compressor 11, which is the amount of refrigerant delivered per unit time, by arbitrarily changing the driving frequency based on instructions from the control device 3.

Furthermore, the four-way valve 12 serving as a flow path switching device switches the flow of the refrigerant depending on the operation to be performed based on instructions from the control device 3. For example, during cooling operation, the four-way valve 12 allows the high-temperature, high-pressure refrigerant discharged by the compressor 11 to flow into the outdoor heat exchanger 13. Further, during heating operation or the like, the high temperature and high pressure refrigerant discharged from the compressor 11 is made to flow into the water heat exchanger 60.

The outdoor heat exchanger 13 exchanges heat between the refrigerant and external air. The outdoor heat exchanger 13 functions as an evaporator during a heating operation to heat water (heating operation), and exchanges heat between the low-pressure refrigerant flowing from the expansion valve 14 side and air, and evaporates the refrigerant. let In addition, in a cooling operation (cooling operation) in which water is cooled, it functions as a condenser, exchanges heat between the high-pressure refrigerant flowing from the compressor 11 side and air, and condenses and liquefies the refrigerant.

A water sprinkler device 5 is attached to the outdoor heat exchanger 13. The water sprinkler 5 sprinkles water on the outdoor heat exchanger 13 when the outdoor heat exchanger 13 functions as a condenser. The outdoor heat exchanger 13 and the water sprinkler 5 will be described in detail later.

Additionally, the outdoor fan 16 sends air to the outdoor heat exchanger 13 to promote heat exchange between the refrigerant and the air. Here, the outdoor fan 16 is driven via a fan inverter drive device (not shown) or the like. The outdoor fan 16 can change the air volume by arbitrarily changing the driving frequency based on instructions from the control device 3. In FIG. 1, the outdoor heat exchanger 13 and the outdoor fan 16 are shown in one-to-one correspondence, but this is not particularly limited.

The water heat exchanger 60, which serves as a heat medium heat exchanger, exchanges heat between water, which serves as a heat medium, and a refrigerant. The water heat exchanger 60 serves as a flow path for two refrigerant circuits and a flow path for a heat medium circulation circuit. Therefore, they constitute a device that constitutes a refrigerant circuit and a device that constitutes a heat medium circulation circuit. The water heat exchanger 60 functions as a condenser during heating operation, for example, and exchanges heat between the refrigerant flowing from the compressor 11 side and water, condensing the refrigerant and liquefying it or converting it into two-phase gas-liquid. , heat the water. On the other hand, during cooling operation, it functions as an evaporator, exchanges heat between the refrigerant flowing from the expansion valve 14 side and water, evaporates the refrigerant, and cools the water.

The expansion valve 14, which serves as a throttle device, adjusts the pressure of the refrigerant passing through the water heat exchanger 60, for example, by changing its opening degree. The expansion valve 14 of this embodiment is an electronic expansion valve whose opening degree is changed based on instructions from the control device 3. However, it is not limited to this. For example, it may be a temperature-sensitive expansion valve that changes the degree of opening based on the temperature of the refrigerant.

The accumulators 15 are each provided on the suction side of the compressor 11, and store surplus refrigerant in the refrigerant circuit.

The pump 80 is one of the devices that constitute the heat medium circulation circuit. In the heat medium circulation circuit, the pump 80 sucks water, applies pressure, sends it out, and circulates it. Further, the pump inverter drive device (not shown) can change the capacity of the pump 80 by arbitrarily changing the drive frequency based on instructions from the control device 3.

The indoor unit 2 is a unit that sends conditioned air to the indoor space that is the object of air conditioning. As shown in FIG. 1, each indoor unit 2 of this embodiment includes an indoor heat exchanger 21, an indoor flow rate adjustment device 22, and an indoor fan 23. The indoor heat exchanger 21 and the indoor flow rate adjustment device 22 are devices that constitute a heat medium circulation circuit. Although FIG. 1 shows a refrigeration cycle apparatus 100 having two indoor units 2, the number of indoor units 2 may be one or three or more.

The indoor flow rate adjustment device 22 is composed of, for example, a two-way valve that can control the opening degree (opening area) of the valve. The indoor flow rate adjustment device 22 controls the flow rate of water flowing into and out of the indoor heat exchanger 21 by adjusting the degree of opening. Then, the indoor flow rate adjustment device 22 adjusts the amount of water to be passed through the indoor heat exchanger 21 based on the temperature of the water flowing into the indoor unit 2 and the temperature of the water flowing out, so that the indoor heat exchanger 21 To enable heat exchange using the amount of heat according to the indoor heat load. Here, when the indoor heat exchanger 21 does not need to exchange heat with the heat load, such as when the indoor heat exchanger 21 is stopped or the thermostat is turned off, the indoor flow rate adjustment device 22 fully closes the valve and The supply can be stopped so that water does not flow into or out of the exchanger 21. In FIG. 1, the indoor flow rate adjustment device 22 is installed in the pipe on the water outflow side of the indoor heat exchanger 21, but the invention is not limited thereto. For example, the indoor flow rate adjustment device 22 may be installed on the water inflow side of the indoor heat exchanger 21.

Furthermore, the indoor heat exchanger 21 is a fin-tube heat exchanger that exchanges heat between indoor air in the indoor space supplied from the indoor fan 23 and water. During cooling operation, water, which is colder than air, passes through the heat transfer tubes of the indoor heat exchanger 21 to cool the indoor space. On the other hand, during heating operation, water that is warmer than air passes through the heat transfer tubes of the indoor heat exchanger 21, heating the indoor space. The indoor fan 23 generates a flow of air that passes through the indoor heat exchanger 21 and returns to the indoor space.

The control device 3 controls the operation of the entire refrigeration cycle device 100. The control device 3 is composed of a computer including a memory that stores data and programs necessary for control, and a CPU that executes the programs, dedicated hardware such as ASIC or FPGA, or both. The control device 3 controls each part of the refrigeration cycle device 100 based on information detected by a temperature sensor or a pressure sensor included in the refrigeration cycle device 100 and instructions from a remote controller (not shown). Specifically, the control device 3 controls the driving frequency of the compressor 11, the rotational speed of the outdoor fan 16 and the indoor fan 23, the switching of the four-way valve 12, the opening degree of the expansion valve 14, the driving frequency of the pump 80, and the indoor flow rate adjustment. The opening degree of the device 22, the water sprinkling of the water sprinkler device 5, etc. are controlled.

Although the control device 3 is provided separately from the heat source unit 1 and the indoor unit 2 in FIG. 1, it may be mounted on the heat source unit 1 or the indoor unit 2. Alternatively, the heat source unit 1 and the indoor unit 2 may each be provided with the control device 3 and may be connected to each other in a wireless or wired communicable manner to transmit and receive various data and the like.

(Configuration of outdoor heat exchanger)
Next, the configuration of the outdoor heat exchanger 13 of this embodiment will be explained. FIG. 2 is a schematic configuration diagram of the outdoor heat exchanger 13 according to the first embodiment. The outdoor heat exchanger 13 of this embodiment is a parallel flow heat exchanger (PFC heat exchanger). The outdoor heat exchanger 13 includes a heat exchange section 130 including a plurality of heat transfer tubes 131 and a plurality of fins 132,

first headers

133a, 133b, and 133c,

second headers

134a and 134b, and

connection pipes

135a and 135b. It is equipped with In FIG. 2, in order to simplify the drawing, only a part of the heat exchanger tubes 131 and fins 132 are shown, and illustration of the whole is omitted.

The heat exchanger tube 131 is a flat tube with a plurality of flow paths formed inside. Each heat exchanger tube 131 is arranged to extend between

first headers

133a, 133b, and 133c and

second headers

134a and 134b. Moreover, each heat exchanger tube 131 is arranged at intervals from each other in a direction orthogonal to the stretching direction. In addition, in the following description, the extending direction of each heat exchanger tube 131 may be referred to as a first direction or a horizontal direction, and the direction orthogonal to the extending direction of each heat exchanger tube 131 may be referred to as a second direction or a vertical direction. Further, a direction perpendicular to the horizontal direction and the vertical direction is sometimes referred to as the depth direction.

The fins 132 are corrugated fins bent into a wave shape. Each fin 132 is arranged to extend between

first headers

133a, 133b, and 133c and

second headers

134a and 134b. Further, each fin 132 is arranged between two adjacent heat exchanger tubes 131 of the plurality of heat exchanger tubes 131, and the two adjacent heat exchanger tubes 131 are connected by the fins 132.

The

first headers

133a, 133b, and 133c are connected to one end of the plurality of heat exchanger tubes 131 in the extending direction, and the

second headers

134a and 134b are connected to the other end of the plurality of heat exchanger tubes 131 in the extending direction. The

first headers

133a, 133b, and 133c and the

second headers

134a and 134b have the function of distributing the refrigerant flowing into the outdoor heat exchanger 13 to the plurality of heat transfer tubes 131, and combining the refrigerant that has flowed through the plurality of heat transfer tubes 131. It has the function of

One end of the connecting pipe 135a is connected to the first header 133a, and the other end is connected to the four-way valve 12. One end of the connecting pipe 135b is connected to the first header 133c, and the other end is connected to the expansion valve 14.

In the outdoor heat exchanger 13 of this embodiment, a plurality of channels P1, P2, P3, and P4 are formed in the heat exchange section 130 with the above configuration. FIG. 2 shows four flow paths P1 to P4 of the heat exchange section 130 when the outdoor heat exchanger 13 functions as a condenser. As shown in FIG. 2, when the outdoor heat exchanger 13 functions as a condenser, the refrigerant discharged from the compressor 11 passes through the four-way valve 12 and flows into the first header 133a from the connection pipe 135a. The refrigerant that has flowed into the first header 133a flows into the second header 134a through the flow path P1 formed by the plurality of heat transfer tubes 131 connected to the first header 133a.

The refrigerant that has flowed into the second header 134a flows into the first header 133b through a flow path P2 formed by a plurality of heat transfer tubes 131 connected between the second header 134a and the first header 133b. The refrigerant that has flowed into the first header 133b flows into the second header 134b through a flow path P3 formed by a plurality of heat transfer tubes 131 connected between the first header 133b and the second header 134b. The refrigerant that has flowed into the second header 134b flows into the first header 133c through a flow path P4 formed by a plurality of heat transfer tubes 131 connected between the second header 134b and the first header 133c. The refrigerant that has flowed into the first header 133c flows out to the expansion valve 14 through the connection pipe 135b.

FIG. 3 is a diagram showing the temperature distribution of the outdoor heat exchanger 13 in the case where the outdoor heat exchanger 13 according to the first embodiment functions as a condenser. As shown in FIG. 3, when the outdoor heat exchanger 13 functions as a condenser, the temperature is higher in the part of the heat exchanger 130 that is closer to the connection pipe 135a, which is the inlet of the refrigerant; It can be seen that the closer the area is, the lower the temperature is. That is, in the flow direction of the refrigerant in the heat exchange section 130, the temperature decreases from upstream to downstream. For example, as shown in FIG. 3, channel P1 has a high temperature (e.g., 80°C to 100°C), channel P2 has a medium temperature (e.g., 40°C to 50°C), and channels P3 and P4 have a low temperature (e.g., 30°C to 40°C). ℃).

(Configuration of watering device)
As shown in FIG. 3, the temperature distribution in the heat exchange part 130 of the outdoor heat exchanger 13 is non-uniform, so if water is uniformly sprinkled on the heat exchange part 130 by the water sprinkler 5, the effect of improving the condensing capacity and the water spraying can be improved. Efficiency will decrease. Specifically, if sufficient water is not sprinkled on the high temperature portion of the heat exchange section 130, the refrigerant will not be sufficiently cooled and the effect of improving the condensing capacity will be reduced. Furthermore, if water is sprinkled on a low-temperature area at the same amount as that on a high-temperature area, the effect of water sprinkling on improving the condensation ability is low, the water used is wasted, and the watering efficiency is reduced.

Therefore, the water sprinkler 5 of the present embodiment has a configuration in which the amount of water sprinkled per unit area (unit: L/(min·m ² )) is varied depending on the temperature distribution of the heat exchange part 130 of the outdoor heat exchanger 13. It becomes. Specifically, in the water sprinkler 5 of the present embodiment, the amount of water sprayed per unit area for a portion where the temperature of the outdoor heat exchanger 13 is relatively high is greater than that for a portion where the temperature of the outdoor heat exchanger 13 is relatively low. The amount of water sprinkled per unit area is greater than the amount of water per unit area. In other words, in the water sprinkling device 5 of the present embodiment, when the outdoor heat exchanger 13 functions as a condenser, the amount of water sprayed per unit area for the part near the refrigerant inlet is the same as that for the part near the refrigerant outlet. It is configured so that the amount of water is greater than the amount of water sprinkled. The amount of water sprinkled per unit area of the water sprinkler 5 may be changed gradually depending on the temperature of the outdoor heat exchanger 13, or may be changed in steps.

FIG. 4 is a schematic configuration diagram of the water sprinkler device 5 of the refrigeration cycle device 100 according to the first embodiment. In FIG. 4, the outdoor heat exchanger 13 is also shown for explanation. The water sprinkler device 5 is attached to a casing or the like that holds the outdoor heat exchanger 13. In order to suppress a decrease in the heat exchange efficiency of the outdoor heat exchanger 13, the water sprinkler device 5 and the outdoor heat exchanger 13 are arranged at intervals in the depth direction. As shown in FIG. 4, the water sprinkler 5 includes a first pipe 50a, a second pipe 50b, a third pipe 50c, and a connecting pipe 52. The first pipe 50a and the second pipe 50b are arranged opposite to each other below the third pipe 50c. The third pipe 50c has one end connected to the first pipe 50a and the other end connected to the second pipe 50b.

The second pipe 50b and the third pipe 50c are connected to a connecting pipe 52. The connection pipe 52 is connected to a water pipe or the like, and water flowing from the connection pipe 52 is supplied to the second pipe 50b, the third pipe 50c, and the first pipe 50a. The connection pipe 52 is provided with a valve that adjusts the flow rate of water, and by controlling the valve by the control device 3, the start and stop of watering by the watering device 5 and the amount of watering are controlled.

The first pipe 50a is arranged to extend in the vertical direction outside one horizontal end of the heat exchange section 130. The second pipe 50b is disposed to extend in the vertical direction outside the other end of the heat exchange section 130 in the horizontal direction. In the following description, one horizontal end side of the heat exchange section 130 will be referred to as a "first header side", and the other horizontal end side of the heat exchange section 130 will be referred to as a "second header side".

A plurality of first nozzles 51a are provided in the first pipe 50a. In the example of FIG. 4, the first pipe 50a is provided with three first nozzles 51a. Each first nozzle 51a is a hollow conical nozzle that sprays atomized water at a spray angle of 60 degrees, for example. The first nozzles 51a are vertically spaced apart from each other. Each first nozzle 51a sprays water onto the flow paths P2 to P4 of the heat exchanger 130 from the first header side toward the second header side. In other words, each first nozzle 51a sprays water from one end of the outdoor heat exchanger 13 in the horizontal direction toward the center of the outdoor heat exchanger 13. Further, as an example, the amount of water sprayed from each first nozzle 51a is 0.24 L/min, and the droplet diameter is 110 μm.

A plurality of second nozzles 51b are provided in the second pipe 50b. In the example of FIG. 4, the second pipe 50b is provided with three second nozzles 51b. Each second nozzle 51b is a hollow conical nozzle that sprays atomized water at a spray angle of 60°, for example. The second nozzles 51b are vertically spaced apart from each other. Each second nozzle 51b is arranged to face each first nozzle 51a, and the vertical position of each second nozzle 51b is the same as the vertical position of each first nozzle 51a. Each second nozzle 51b sprays water onto the flow paths P2 to P4 of the heat exchanger 130 from the second header side toward the first header side. In other words, each second nozzle 51b sprays water from the other end of the outdoor heat exchanger 13 in the horizontal direction toward the center of the outdoor heat exchanger 13. Further, as an example, the amount of water sprayed from each second nozzle 51b is 0.24 L/min, and the droplet diameter is 110 μm.

The third pipe 50c is arranged to extend horizontally along the lower end of the flow path P1 of the heat exchange section 130. A plurality of third nozzles 51c are provided in the third pipe 50c. In the example of FIG. 4, the third pipe 50c is provided with four third nozzles 51c. Each third nozzle 51c is a hollow conical nozzle that sprays atomized water at a spray angle of 60 degrees, for example. The third nozzles 51c are arranged at intervals from each other in the horizontal direction. Each of the third nozzles 51c sprays water upward, and sprays water onto the flow path P1 of the heat exchanger 130 from below to above. That is, the four third nozzles 51c of the third pipe 50c spray water on the flow path P1 in the heat exchange section 130. Further, as an example, the amount of water sprayed from each third nozzle 51c is 0.13 L/min, and the droplet diameter is 110 μm.

As described above, in the water sprinkling device 5 of the present embodiment, the number of nozzles in the third pipe 50c that sprays water on the flow path P1, which is relatively high in temperature in the heat exchange section 130, is greater than that in the first pipe 50a. The number of nozzles is greater than the number of nozzles, and the number of nozzles of the second pipe 50b is greater. This makes it possible to make the amount of water sprayed per unit area for the flow path P1, which is relatively high temperature, in the heat exchange section 130 larger than the amount of water sprayed per unit area for the flow paths P2 to P4, which are relatively low temperature. can.

As described above, in this embodiment, by increasing the amount of water sprinkled per unit area of the high temperature portion of the outdoor heat exchanger 13 that functions as a condenser, the condensing capacity is improved, and the COP of the entire refrigeration cycle device 100 is improved. do. Furthermore, by reducing the amount of water sprinkled on the low temperature portion of the outdoor heat exchanger 13, waste of water can be reduced and water sprinkling efficiency can also be improved. When the height of the heat exchange section 130 is 1.22 m and the width is 1.47 m, the total amount of water sprinkled by the water sprinkler 5 of the first embodiment is 1.96 L/min, which is a lower amount of water than the conventional technology. can be reduced. Moreover, in this case, the amount of water sprinkled per unit area of the water sprinkler 5 is 1.09 L/(min·m ² ).

Furthermore, when the heat exchanger tubes 131 and fins 132 are composed of flat tubes and corrugated fins as in the outdoor heat exchanger 13 of the present embodiment, water adhering to the outdoor heat exchanger 13 may enter the corrugated valleys of the corrugated fins. Water accumulates and is likely to be retained in the outdoor heat exchanger 13. As a result, when the amount of water sprinkled is increased, the amount of water retained increases, creating air resistance, which may deteriorate the performance of the outdoor heat exchanger 13. On the other hand, as described in the above example, by setting the diameter of the water droplets sprayed from each nozzle of the water sprinkler 5 to 110 μm, the increase in the amount of water retained in the outdoor heat exchanger 13 is suppressed. However, deterioration in the performance of the outdoor heat exchanger 13 can be suppressed. Note that the droplet diameter (not shown) is not limited to 110 μm, but may be 160 μm or less.

Embodiment 2.
FIG. 5 is a schematic configuration diagram of a water sprinkler device 5A of the refrigeration cycle device 100 according to the second embodiment. As shown in FIG. 5, the water sprinkler 5A of the second embodiment is different from the first embodiment in the configuration of the third pipe 50c. The other configurations of refrigeration cycle device 100 are the same as in the first embodiment.

In FIG. 5, the outdoor heat exchanger 13 is also shown for explanation. The water sprinkler 5A is attached to a casing or the like that holds the outdoor heat exchanger 13, as in the first embodiment. As shown in FIG. 5, the water sprinkler 5A includes a first pipe 50a, a second pipe 50b, a third pipe 50c, and a connecting pipe 52. The first pipe 50a and the second pipe 50b are arranged opposite to each other below the third pipe 50c. The third pipe 50c has one end connected to the first pipe 50a and the other end connected to the second pipe 50b.

The configurations of the first pipe 50a and first nozzle 51a, as well as the second pipe 50b and second nozzle 51b in this embodiment are the same as in the first embodiment.

The third pipe 50c is disposed outside the upper end of the heat exchanger 130 and above the upper end of the heat exchanger 130, extending in the horizontal direction. The third pipe 50c is provided with four third nozzles 51c. Each third nozzle 51c is a hollow conical nozzle that sprays atomized water at a spray angle of 60 degrees, for example. The third nozzles 51c are arranged at intervals from each other in the horizontal direction. Each third nozzle 51c sprays water downward, and sprays water from above to below onto the flow path P1 of the heat exchange section 130. That is, the four third nozzles 51c of the third pipe 50c spray water onto the flow path P1 in the heat exchange section 130. Further, as an example, the amount of water sprayed from each third nozzle 51c is 0.13 L/min, and the droplet diameter is 110 μm.

Also in the water sprinkling device 5A of the present embodiment, the number of nozzles in the third pipe 50c that sprays water on the relatively high temperature flow path P1 in the heat exchange section 130 is greater than the number of nozzles in the first pipe 50a. There are also many nozzles, which are greater than the number of nozzles in the second pipe 50b. This makes it possible to make the amount of water sprayed per unit area for the flow path P1, which is relatively high temperature, in the heat exchange section 130 larger than the amount of water sprayed per unit area for the flow paths P2 to P4, which are relatively low temperature. can.

As described above, the same effects as in Embodiment 1 can be obtained in this embodiment as well. Further, by arranging the third pipe 50c outside the heat exchange section 130, it is possible to prevent the air from flowing into the heat exchange section 130 from being obstructed, and to suppress a decrease in the performance of the outdoor heat exchanger 13.

Embodiment 3.
FIG. 6 is a schematic configuration diagram of the water sprinkler device 5B of the refrigeration cycle device 100 according to the third embodiment. As shown in FIG. 6, the third embodiment differs from the first embodiment in that the water sprinkler 5B does not include the third pipe 50c. The other configurations of refrigeration cycle device 100 are the same as in the first embodiment.

In FIG. 6, the outdoor heat exchanger 13 is also shown for explanation. The water sprinkling device 5B is attached to a casing or the like that holds the outdoor heat exchanger 13, as in the first embodiment. As shown in FIG. 6, the water sprinkler 5B includes a first pipe 50a, a second pipe 50b, and connection pipes 52 connected to the first pipe 50a and the second pipe 50b, respectively. The first pipe 50a and the second pipe 50b are independent from each other, and one end of the first pipe 50a and the second pipe 50b is connected to a connecting pipe 52, respectively. The connecting pipe 52 is connected to a water pipe or the like, and water flowing from the connecting pipe 52 is supplied to the first pipe 50a and the second pipe 50b, respectively. The connection pipe 52 is provided with a valve that adjusts the flow rate of water, and by controlling the valve by the control device 3, the start and stop of watering by the watering device 5 and the amount of watering are controlled.

The first pipe 50a is arranged to extend in the vertical direction outside one horizontal end of the heat exchange section 130. The second pipe 50b is disposed to extend in the vertical direction outside the other end of the heat exchange section 130 in the horizontal direction.

The first pipe 50a is provided with five first nozzles 51a1, 51a2, 51a3, 51a4, and 51a5. Each of the first nozzles 51a1 to 51a5 is a hollow conical nozzle that sprays atomized water at a spray angle of 60°, for example. The first nozzles 51a1 to 51a5 are arranged at regular intervals (for example, about 0.2 m) in the vertical direction, and are arranged from the first header side to the second header side with respect to the flow paths P1 to P4 of the heat exchange section 130. Sprinkle water.

Further, the amount of water sprayed by each of the first nozzles 51a1 to 51a5 is set to be different depending on the temperature distribution of the outdoor heat exchanger 13. Specifically, the amount of water sprayed by a nozzle placed in a portion of the outdoor heat exchanger 13 where the temperature is relatively high is set to be greater than the amount of water sprinkled by a nozzle placed in a portion where the temperature is relatively low. . In the configuration of FIG. 6, the amount of water sprayed by the first nozzles 51a1 and 51a2 arranged above is greater than the amount of water sprayed by the first nozzles 51a3 to 51a5 arranged below. As an example, the amount of water sprayed by the first nozzle 51a1 and the first nozzle 51a2 is 0.27 L/min. The amount of water sprayed from the first nozzle 51a3 is 0.21 L/min. The amount of water sprayed from the first nozzle 51a4 is 0.17 L/min. The amount of water sprayed from the first nozzle 51a5 is 0.09 L/min. The diameter of water droplets sprayed from each of the first nozzles 51a1 to 51a5 is 160 μm or less, and is set according to the amount of water sprayed.

The second pipe 50b is provided with five second nozzles 51b1, 51b2, 51b3, 51b4, and 51b5. Each of the second nozzles 51b1 to 51b5 is a hollow conical nozzle that sprays atomized water at a spray angle of 60°, for example. The second nozzles 51b1 to 51b5 are arranged at equal intervals (for example, about 0.2 m) in the vertical direction, and are arranged from the second header side toward the first header side with respect to the flow paths P1 to P4 of the heat exchange section 130. Sprinkle water. The second nozzles 51b1 to 51b5 are arranged to face the first nozzles 51a1 to 51a5, and the vertical position of each second nozzle 51b1 to 51b5 is the same as the vertical position of each first nozzle 51a1 to 51a5. It's the same.

Furthermore, the amount of water sprayed by the second nozzles 51b1 to 51b5 of the second pipe 50b is set to vary depending on the temperature distribution of the outdoor heat exchanger 13, similarly to the first nozzles 51a1 to 51a5 of the first pipe 50a. Specifically, the amount of water sprayed by a nozzle placed in a portion of the outdoor heat exchanger 13 where the temperature is relatively high is set to be greater than the amount of water sprinkled by a nozzle placed in a portion where the temperature is relatively low. . In the configuration of FIG. 6, the amount of water sprayed by the second nozzles 51b1 and 51b2 arranged above is greater than the amount of water sprayed by the second nozzles 51b3 to 51b5 arranged below. As an example, the amount of water sprayed by the second nozzle 51b1 and the second nozzle 51b2 is 0.27 L/min. The amount of water sprayed from the second nozzle 51b3 is 0.21 L/min. The amount of water sprayed from the second nozzle 51b4 is 0.17 L/min. The amount of water sprayed from the second nozzle 51b5 is 0.09 L/min. The diameter of water droplets sprayed from each of the second nozzles 51b1 to 51b5 is 160 μm or less, and is set according to the amount of water sprayed.

In the water sprinkler 5B of this embodiment, the number of nozzles in the first pipe 50a and the second pipe 50b are the same, and the arrangement is also uniform. However, the amount of water sprayed by the nozzle that sprays water on the channel P1, which is relatively high temperature in the heat exchange section 130, is the same as that of the nozzle that sprays water on the channels P2 to P4, which are relatively low temperature in the heat exchange section 130. The amount is higher than the amount of water sprayed by the nozzle. This makes it possible to make the amount of water sprayed per unit area for the flow path P1, which is relatively high temperature, in the heat exchange section 130 larger than the amount of water sprayed per unit area for the flow paths P2 to P4, which are relatively low temperature. can.

As described above, the same effects as in Embodiment 1 can be obtained in this embodiment as well. Furthermore, by omitting the third pipe 50c extending in the horizontal direction, the configuration of the water sprinkler 5 can be simplified and the number of parts can be reduced.

The above is a description of the embodiments, but the present disclosure is not limited to the above embodiments, and various modifications or combinations can be made without departing from the gist of the present disclosure. For example, in the above embodiment, the refrigeration cycle device 100 is a heat pump chiller, but the refrigeration cycle device 100 may be a cooling-only machine without a cooling/heating switch, a refrigerator for cooling a refrigerated warehouse, or a direct expansion It may also be a type air conditioner. When the refrigeration cycle device 100 is a cooling-only machine or a refrigerator, the four-way valve 12 is omitted, the outdoor heat exchanger 13 becomes a condenser, and the indoor heat exchanger 21 becomes an evaporator.

Furthermore, the temperature distribution of the outdoor heat exchanger 13 is not limited to the example shown in FIG. 3, but varies depending on the configuration of the outdoor heat exchanger 13 or the type of refrigerant used. Therefore, if the amount of water sprinkled per unit area in the high temperature part of the outdoor heat exchanger 13 can be made larger than the amount of water sprinkled per unit area in the low temperature part, the orientation, number or arrangement of the nozzles of the water sprinkler 5, or the nozzle The amount of water sprayed or the droplet size can be changed arbitrarily.

For example, the vertical position of the third pipe 50c is not limited to the first embodiment or the second embodiment. The third pipe 50c is arranged above or below the lower end of the flow path P1 of the heat exchange section 130, as long as the third nozzle 51c is in a position where the temperature of the portion of the heat exchange section 130 is relatively high can be sprayed with water. Good too.

Furthermore, in the embodiment described above, the adjustment of the amount of water sprinkled per unit area of the water sprinkler 5 when the temperature decreases from the top to the bottom of the outdoor heat exchanger 13 has been described, but the invention is not limited to this. do not have. For example, the amount of water sprayed in the horizontal direction of the outdoor heat exchanger 13 may also be varied depending on the temperature distribution. Specifically, in the first and second embodiments, the amount of water sprayed from the third nozzle 51c provided in the third pipe 50c may be varied depending on the temperature distribution of the outdoor heat exchanger 13. In this case, the amount of water sprayed by the third nozzle 51c at the left end closest to the refrigerant inlet of the outdoor heat exchanger 13 is made larger than the amount of water sprayed by the third nozzle 51c at the right end furthest from the refrigerant inlet of the outdoor heat exchanger 13. Thereby, condensation ability and water sprinkling efficiency can be further improved.

Further, in the above embodiment, the heat source unit 1 has a configuration having four refrigerant circuits, but is not limited to this, and may have three or less refrigerant circuits, or five or more refrigerant circuits. Further, in the above embodiment, the case where the outdoor heat exchanger 13 has four channels P1 to P4 has been described, but the number of channels in the outdoor heat exchanger 13 may be three or less, or five or more. But that's fine. Further, the outdoor heat exchanger 13 is not limited to a PFC heat exchanger having corrugated fins, but may be a fin tube type heat exchanger having plate fins.

1 Heat source unit, 2 Indoor unit, 3 Control device, 5, 5A, 5B Water sprinkler, 11 Compressor, 12 Four-way valve, 13 Outdoor heat exchanger, 14 Expansion valve, 15 Accumulator, 16 Outdoor fan, 21 Indoor heat exchanger , 22 Indoor flow rate adjustment device, 23 Indoor fan, 50a First piping, 50b Second piping, 50c Third piping, 51a, 51a1, 51a2, 51a3, 51a4, 51a5 First nozzle, 51b, 51b1, 51b2, 51b3, 51b4 , 51b5 second nozzle, 51c third nozzle, 52 connection piping, 60 water heat exchanger, 80 pump, 100 refrigeration cycle device, 130 heat exchange section, 131 heat transfer tube, 132 fin, 133a, 133b, 133c first header, 134a, 134b second header, 135a, 135b connection piping.

Claims

a condenser;
a water sprinkler device for sprinkling water on the condenser;
A refrigeration cycle device in which the amount of water sprinkled per unit area of the water sprinkler varies depending on the temperature distribution of the condenser.
The refrigeration cycle device according to claim 1, wherein the amount of water sprinkled per unit area in a portion where the temperature of the condenser is relatively high is greater than the amount of water sprinkled per unit area in a portion where the temperature of the condenser is relatively low. .
The watering device includes a plurality of nozzles,
Among the plurality of nozzles, the number of nozzles or the amount of water sprayed on a portion where the temperature of the condenser is relatively high is greater than the number of nozzles or the amount of water sprayed on a portion where the temperature of the condenser is relatively low. The refrigeration cycle device according to claim 1 or 2, wherein the refrigeration cycle device includes a large number of refrigeration cycle devices.
The watering device includes:
a first pipe provided with a plurality of first nozzles and extending in a first direction;
a second pipe provided with a plurality of second nozzles and extending in the first direction;
a third piping provided with a plurality of third nozzles and extending in a second direction perpendicular to the first direction;
The first pipe and the second pipe are arranged to face each other,
One end of the third pipe is connected to the first pipe, the other end is connected to the second pipe,
The plurality of third nozzles spray water to a portion of the condenser where the temperature is relatively high,
The plurality of first nozzles and the plurality of second nozzles spray water to a portion of the condenser where the temperature is relatively low,
The refrigeration cycle device according to claim 1 or 2, 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 third pipe is provided below the upper end of the condenser,
The refrigeration cycle device according to claim 4, wherein the plurality of third nozzles spray water upward.
The third pipe is provided above the upper end of the condenser,
The refrigeration cycle device according to claim 4, wherein the plurality of third nozzles spray water downward.
The watering device includes:
a first pipe provided with a plurality of first nozzles and extending in a first direction;
a second pipe provided with a plurality of second nozzles and extending in the first direction;
The first pipe and the second pipe are arranged to face each other,
Among the plurality of first nozzles and the plurality of second nozzles, the amount of water sprayed by the first nozzle and the second nozzle, which spray water on a portion where the temperature of the condenser is relatively high, is determined depending on the temperature of the condenser. The refrigeration cycle device according to claim 1 or 2, wherein the amount of water sprayed is greater than the amount of water sprayed by the first nozzle and the second nozzle that spray water on the lower part.
The refrigeration cycle device according to claim 7, wherein the plurality of first nozzles and the plurality of second nozzles are arranged at equal intervals in the first direction.