WO2022044219A1

WO2022044219A1 - Refrigeration cycle device

Info

Publication number: WO2022044219A1
Application number: PCT/JP2020/032448
Authority: WO
Inventors: 智隆石川; 宗野本
Original assignee: 三菱電機株式会社
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-03-03
Also published as: JPWO2022044219A1; JP7357804B2

Abstract

A refrigeration cycle device (100) is provided with a first refrigerant circuit (10) in which a first refrigerant circulates and a second refrigerant circuit (20) in which a second refrigerant circulates. The first refrigerant circuit and the second refrigerant circuit include a first heat exchanger (1) that exchanges heat between the first refrigerant and the second refrigerant. The first refrigerant circuit further includes a first part, which is a part of the first refrigerant circuit, a second part, which is another part of the first refrigerant circuit, and a blowout part (5) that is connected to the first part and is arranged to face an outer peripheral surface of the second part. The blowout part blows the first refrigerant onto the outer peripheral surface when the pressure of the first refrigerant in the first refrigerant circuit becomes a predetermined value or more.

Description

Refrigeration cycle device

This disclosure relates to a refrigeration cycle device.

Conventionally, there is known a refrigeration cycle device provided with a safety valve for discharging the refrigerant to the outside of the refrigerant circuit when the pressure of the refrigerant enclosed in the refrigerant circuit rises excessively (for example, Japanese Patent Application Laid-Open No. 2003-336917). reference). In such a refrigeration cycle device, when the pressure of the refrigerant on the inlet side of the safety valve becomes equal to or higher than the outlet pressure of the safety valve, the refrigerant is discharged from the safety valve to the outside of the refrigerant circuit.

Japanese Patent Application Laid-Open No. 2003-336917

In the refrigeration cycle device, the refrigerant is discharged from the safety valve to the outside of the refrigerant circuit until the pressure of the refrigerant on the inlet side of the safety valve becomes equal to or lower than the shutoff pressure of the safety valve. It is realized only by discharging the refrigerant from the refrigerant circuit to the outside of the refrigerant circuit. Therefore, in the refrigeration cycle device, the amount of refrigerant released in order to reduce the pressure of the refrigerant from the outlet pressure of the safety valve to the pressure at which it stops is relatively large, and it is difficult to suppress the amount of refrigerant released. there were.

If the amount of refrigerant released is relatively large, the amount of refrigerant refilled will be relatively large when the refrigeration cycle device is reused. Further, when the amount of the refrigerant released is relatively large, the refrigerating machine oil is likely to be discharged to the outside of the refrigerant circuit together with the refrigerant, and the refrigerating machine oil may need to be refilled. In addition, if the amount of refrigerant released is relatively large, there is an increased risk that the operator may come into contact with the released refrigerant and suffer low-temperature burns.

A main object of the present disclosure is to provide a refrigerating cycle device capable of suppressing an excessive increase in the pressure of the refrigerant while suppressing the amount of refrigerant released as compared with a conventional refrigerating cycle device.

The refrigeration cycle apparatus according to the present disclosure includes a first refrigerant circuit in which the first refrigerant circulates and a second refrigerant circuit in which the second refrigerant circulates. The first refrigerant circuit and the second refrigerant circuit include a first heat exchanger that exchanges heat between the first refrigerant and the second refrigerant. The first refrigerant circuit is connected to the first part, which is a part of the first refrigerant circuit, the second part, which is another part of the first refrigerant circuit, and the first part, and is the outer periphery of the second part. Further includes a blowout portion arranged to face the surface. When the pressure of the first refrigerant in the first refrigerant circuit becomes equal to or higher than a predetermined value, the blowout portion blows out the first refrigerant to the outer peripheral surface.

According to the present disclosure, it is possible to provide a refrigerating cycle device capable of suppressing the amount of refrigerant released as compared with a conventional refrigerating cycle device while suppressing an excessive rise in the pressure of the refrigerant.

It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 1. FIG. It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 2. It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 3. It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 4. It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 5. It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 6. It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 7. It is a block diagram which shows the refrigeration cycle apparatus which concerns on Embodiment 8.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding parts will be given the same reference number and the explanation will not be repeated.

Embodiment 1.
As shown in FIG. 1, the refrigeration cycle device 100 according to the first embodiment includes a first refrigerant circuit 10 and a second refrigerant circuit 20. In other words, the refrigeration cycle device 100 is a dual refrigeration cycle device.

The first refrigerant circuit 10 mainly includes a first heat exchanger 1, a second heat exchanger 2, a pump 3, a receiver 4, and a blowout portion 5. The first refrigerant circuit 10 is filled with the first refrigerant. In the first refrigerant circuit, the first refrigerant circulates through the pump 3, the second heat exchanger 2, the first heat exchanger 1, and the receiver 4 in the order described.

The second refrigerant circuit 20 mainly includes a first heat exchanger 1, a compressor 21, a third heat exchanger 22, and an expansion valve 23. The second refrigerant circuit 20 is filled with the second refrigerant. In the second refrigerant circuit, the second refrigerant circulates the compressor 21, the third heat exchanger 22, the expansion valve 23, and the first heat exchanger 1 in the order described.

The first heat exchanger 1 is a heat exchanger that exchanges heat between the first refrigerant and the second refrigerant. In the first heat exchanger 1, the first refrigerant is condensed by the heat exchange, and the second refrigerant is evaporated by the heat exchange. The first heat exchanger 1 is a cascade condenser, which acts as a condenser in the first refrigerant circuit 10 and as an evaporator in the second refrigerant circuit 20. The second heat exchanger 2 acts as an evaporator in the first refrigerant circuit 10. The second heat exchanger 2 is a heat exchanger that exchanges heat between, for example, a first refrigerant and a heat medium such as air around the second heat exchanger 2, and acts as a cooler for cooling the heat medium. The second heat exchanger 2 is arranged in a space to be cooled, for example, an internal space of a showcase. The third heat exchanger 22 acts as a condenser in the second refrigerant circuit 20. The third heat exchanger 22 is a heat exchanger that exchanges heat between, for example, a second refrigerant and a heat medium such as air around the third heat exchanger 22.

The first heat exchanger 1 has a first lower flow path 1a located on the downstream side of the first refrigerant circuit 10 and a first upper flow path 1b located on the upstream side of the first refrigerant circuit 10. The second heat exchanger 2 has a second lower flow path 2b located on the downstream side of the first refrigerant circuit 10 and a second upper flow path 2a located on the upstream side of the first refrigerant circuit 10. Each of the first lower flow path 1a, the first upper flow path 1b, the second upper flow path 2a, and the second lower flow path 2b includes, for example, a plurality of heat transfer tubes and a distribution unit connected to each end of the plurality of heat transfer tubes.

The first refrigerant circuit 10 includes a first refrigerant flow path from the first lower flow path 1a of the first heat exchanger 1 to the second upper flow path 2a of the second heat exchanger 2, and a downstream side of the second heat exchanger. It has a second refrigerant flow path from the portion located in the above to the portion located on the upstream side of the first heat exchanger. The pump 3 and the receiver 4 are arranged in the first refrigerant flow path.

The first refrigerant flow path includes a refrigerant flow path 11 connecting between the first lower flow path 1a of the first heat exchanger 1 and the receiver 4, a refrigerant flow path 12 connecting between the receiver 4 and the pump 3, and a refrigerant flow path 12. It has a refrigerant flow path 13 that connects the pump 3 and the second upper flow path 2a of the second heat exchanger 2. The second refrigerant flow path has a refrigerant flow path 14 that connects between the second lower flow path 2b of the second heat exchanger 2 and the first upper flow path 1b of the first heat exchanger 1.

Pump 3 sends out the first refrigerant. Preferably, the pump 3 is a liquid pump that sends out the first refrigerant in a liquid state.

The receiver 4 temporarily stores the first refrigerant inside the receiver 4. In the receiver 4, the first refrigerant is gas-liquid separated. The first refrigerant flowing out from the receiver 4 to the pump 3 is a saturated liquid having no degree of supercooling. The receiver 4 has a lower portion 4a located below and an upper portion 4b located above the lower portion 4a. Of the first refrigerants that have flowed into the receiver 4, the first refrigerant, which is saturated steam, is stored inside the upper portion 4b. The receiver 4 has an outer peripheral surface located outside the first refrigerant circuit 10.

The blowout portion 5 is connected to the refrigerant flow path 12 and is arranged so as to face the outer peripheral surface of the upper portion 4b of the receiver 4. When the pressure of the first refrigerant in the refrigerant flow path 12 becomes equal to or higher than a predetermined value (for example, the outlet pressure of the safety valve 5b described later), the blowout portion 5 upwards a part of the first refrigerant in the refrigerant flow path 12. It is blown out to the outer peripheral surface of the portion 4b.

Specifically, the blowout portion 5 has, for example, a pipeline 5a and a safety valve 5b. The pipeline 5a is branched from the refrigerant flow path 12. The safety valve 5b mainly includes, for example, a refrigerant flow path connecting an inlet side opening, an outlet side opening, an inlet side opening and an outlet side opening, and a valve body that opens and closes the refrigerant flow path. Have in. The inlet side opening is connected to the pipeline 5a. The outlet-side opening forms a blowout port of the blowout portion 5, and is arranged so as to face the outer peripheral surface of the upper portion 4b of the receiver 4 at a distance from each other. The outlet of the outlet 5 faces, for example, in the horizontal direction. The distance between the blowout port of the blowout portion 5 and the outer peripheral surface of the upper portion 4b is set so that the first refrigerant blown out from the blowout port of the blowout portion 5 reaches the outer peripheral surface.

The pressure on the inlet side when the safety valve 5b opens (the blowout pressure of the safety valve 5b) is set to be equal to or lower than the withstand voltage (design pressure) of the refrigerant pipe of the first refrigerant circuit 10. The pressure on the inlet side when the safety valve 5b is closed (the blow-off pressure of the safety valve 5b) is set to be less than the withstand voltage (design pressure) of the refrigerant pipe of the first refrigerant circuit 10.

From a different point of view, the first refrigerant circuit 10 includes a first part P1 which is a part of the first refrigerant circuit 10, a second part P2 which is another part of the first refrigerant circuit 10, and a first part. The blowout portion 5 which is connected to P1 and is arranged so as to face the outer peripheral surface of the second portion P2c is included. The first part P1 is a part through which the first refrigerant in a liquid state is circulated or stored. In the present disclosure, a liquid single-phase first refrigerant or a gas-liquid two-phase first refrigerant having a dryness of 50% or less is referred to as a liquid first refrigerant. The second part P2 is a part where the first refrigerant in a gas state is circulated or stored. In the present disclosure, a gas single-phase first refrigerant or a gas-liquid two-phase first refrigerant having a dryness of more than 50% is referred to as a gas-state first refrigerant.

During normal operation of the refrigeration cycle device 100, the first refrigerant in the liquid state circulates in the first part P1 and the first refrigerant in the gas state circulates in the second part P2. When the normal operation of the refrigeration cycle device 100 is stopped, the first refrigerant in the liquid state is stored in the first part P1, and the first refrigerant in the gas state is stored in the second part P2. In the refrigerating cycle apparatus 100, at least a part of the first refrigerant flow path is the first part P1, and at least a part of the second refrigerant flow path and the upper part 4b of the receiver in the first refrigerant flow path is the second part P2. Is. When the pressure of the first refrigerant of the first part P1 becomes equal to or higher than a predetermined value, the blowing part 5 blows out the first refrigerant of the first part P1 to the outer peripheral surface of the upper part 4b.

The pressure of the first refrigerant at room temperature is higher than the withstand voltage of the first refrigerant circuit 10. The pressure of the first refrigerant at room temperature is, for example, 3 MPa or more. The first refrigerant contains, for example, carbon dioxide (CO2). The pressure of carbon dioxide at room temperature is 5 MPa or more.

Next, the normal operation of the refrigeration cycle device 100 will be described. During normal operation of the refrigeration cycle device 100, the first refrigerant circuit 10 is sealed, and the first refrigerant sealed in the first refrigerant circuit 10 circulates in the direction indicated by the arrow in FIG. As described above, the first refrigerant, which is the saturated liquid flowing out of the receiver 4, flows into the second heat exchanger 2 via the refrigerant flow path 12, the pump 3, and the refrigerant flow path 13. The saturated liquid state first refrigerant exchanges heat with a heat medium such as air in the second heat exchanger 2 and evaporates. As a result, the heat medium is cooled. The dryness of the first refrigerant flowing through the second lower flow path 2b of the second heat exchanger 2 is higher than the dryness of the first refrigerant flowing through the second upper flow path 2a of the second heat exchanger 2. The second lower flow path 2b of the second heat exchanger 2 is a portion through which the first refrigerant in a gas state flows in the first refrigerant circuit 10 during normal operation.

The gas-state first refrigerant flowing out of the second heat exchanger 2 flows into the first heat exchanger 1 via the refrigerant flow path 14. The first refrigerant in the gas state exchanges heat with the second refrigerant in the first heat exchanger 1 and condenses. As a result, the second refrigerant evaporates. The dryness of the first refrigerant flowing through the first upper flow path 1b of the first heat exchanger 1 is higher than the dryness of the first refrigerant flowing through the first lower flow path 1a of the first heat exchanger 1. The first upper flow path 1b of the first heat exchanger 1 is a portion through which the first refrigerant in a gas state flows in the first refrigerant circuit 10 during normal operation.

The liquid-state first refrigerant flowing out of the first heat exchanger 1 flows into the receiver 4 via the refrigerant flow path 11. The first refrigerant is gas-liquid separated at the receiver 4. The upper portion 4b of the receiver 4 is a portion in which the first refrigerant in the gas state is stored in the first refrigerant circuit 10 during normal operation. The first lower flow path 1a, the refrigerant flow path 11, the refrigerant flow path 12, the refrigerant flow path 13, and the second upper flow path 2a of the second heat exchanger 2 are the first refrigerant in normal operation. This is the portion where the first refrigerant in a liquid state flows in the circuit 10.

As described above, during the normal operation of the refrigerating cycle device 100, the second heat exchanger 2 acts as a cooler. During normal operation, the outer peripheral surface of the receiver 4 does not come into contact with the first refrigerant.

Next, the time when the normal operation of the refrigeration cycle device 100 is stopped will be described. When the normal operation of the refrigerating cycle device 100 is stopped due to, for example, a failure or a power failure of the refrigerating cycle device 100, the temperature of the first refrigerant in the first refrigerant circuit 10 rises, and the pressure of the first refrigerant also rises accordingly. In the first refrigerant circuit 10 when the operation is stopped, the first refrigerant in the gas state is the second lower flow path 2b of the second heat exchanger 2, the refrigerant flow path 14, and the first upper flow path 1b of the first heat exchanger 1. And is stored in the upper portion 4b of the receiver 4. When the pressure of the first refrigerant in the first refrigerant circuit 10 reaches the outlet pressure of the safety valve 5b of the blowout portion 5, the safety valve 5b opens and the first refrigerant is directed from the blowout portion 5 toward the outer peripheral surface of the upper portion 4b of the receiver 4. Is blown out. The refrigerant blown out from the blowout portion 5 reaches the outer peripheral surface of the upper portion 4b of the receiver 4 and cools the upper portion 4b from the outside. As a result, the pressure of the first refrigerant in the first refrigerant circuit 10 decreases. When the pressure of the first refrigerant in the first refrigerant circuit 10 reaches the stop pressure of the safety valve 5b, the safety valve 5b closes again and the blowing of the first refrigerant stops.

When the refrigerating cycle device 100 resumes the normal operation after the operation is stopped, the first refrigerant is refilled in the first refrigerant circuit 10 before the restart of the normal operation, if necessary.

<Action effect>
The refrigeration cycle device 100 includes a first refrigerant circuit 10 in which the first refrigerant circulates, and a second refrigerant circuit 20 in which the second refrigerant circulates. The first refrigerant circuit 10 and the second refrigerant circuit 20 include a first heat exchanger 1 in which the first refrigerant and the second refrigerant exchange heat with each other to condense the first refrigerant and evaporate the second refrigerant. The first refrigerant circuit 10 is connected to a first part P1 which is a part of the first refrigerant circuit 10, a second part P2 which is another part of the first refrigerant circuit 10, and a first part P1. Further, the blowout portion 5 arranged so as to face the outer peripheral surface of the second portion P2 is included. When the pressure of the first refrigerant in the first refrigerant circuit 10 becomes equal to or higher than the pressure of the safety valve 5b, the blowout portion 5 blows out the first refrigerant to the outer peripheral surface.

When the operation of the refrigerating cycle device 100 is stopped, the first refrigerant in the first refrigerant circuit 10 is blown out from the blowout portion 5 to the outside of the first refrigerant circuit 10, so that the pressure of the first refrigerant in the first refrigerant circuit 10 is reached. Excessive rise is suppressed. Further, the blowing portion 5 blows the first refrigerant onto the outer peripheral surface of the second portion P2 of the first refrigerant circuit 10, whereby the first refrigerant in the second portion P2 is cooled and the first refrigerant in the second portion P2 is cooled. The pressure of the refrigerant drops. As a result, in the refrigerating cycle device 100, the pressure of the first refrigerant in the first refrigerant circuit 10 is compared with the refrigerating cycle device in which the blowing portion is provided so as to simply blow the first refrigerant to the outside of the first refrigerant circuit. Since the increase is suppressed, the amount of refrigerant blown out to the outside of the first refrigerant circuit 10 can be reduced.

In the refrigeration cycle apparatus 100, the first part P1 is a part where the first refrigerant in a liquid state is circulated or stored, and the second part P2 is a part where the first refrigerant in a gas state is circulated or stored. be. When the pressure of the first refrigerant of the first part P1 becomes equal to or higher than a predetermined value, the blowing portion 5 blows out the first refrigerant of the first part P1 to the outer peripheral surface of the second part P2.

In the refrigeration cycle apparatus 100, since the first refrigerant in the liquid state is blown out to the outer peripheral surface of the second part P2 in which the first refrigerant in the gas state flows or is stored, the first refrigerant in the gas state is the second part. Compared with the case where it is blown out to the outer peripheral surface of P2, the first refrigerant in a gas state is more likely to be liquefied, and the pressure increase of the first refrigerant is suppressed more effectively. As a result, in the refrigerating cycle apparatus 100, the amount of the refrigerant blown out to the outside of the first refrigerant circuit 10 can be reduced as compared with the case where the first refrigerant in the gas state is blown out to the outer peripheral surface of the second part P2. ..

In the refrigeration cycle device 100, the first refrigerant circuit 10 further includes a second heat exchanger 2 in which the first refrigerant evaporates. The first refrigerant circuit 10 has a first refrigerant flow path from a first lower flow path 1a located on the downstream side of the first heat exchanger 1 to a second upper flow path 2a located on the upstream side of the second heat exchanger 2. It has a second lower flow path 2b located on the downstream side of the second heat exchanger and a second refrigerant flow path from the first upper flow path 1b located on the upstream side of the first heat exchanger. The first refrigerant flow path is arranged between the first lower flow path 1a of the first heat exchanger 1 and the second upper flow path 2a of the second heat exchanger 2, and the receiver 4 in which the first refrigerant is stored is stored. including. The first part P1 is a part of the refrigerant flow path 12 included in the first refrigerant flow path. The second part P2 is an upper part 4b located above the receiver 4.

In the refrigerating cycle apparatus 100, the first refrigerant in the gas state in the upper portion 4b is cooled by exchanging heat with the first refrigerant in the liquid state blown out on the outer peripheral surface of the upper portion 4b, and the gas state in the upper portion 4b. The liquefaction of the first refrigerant is promoted. As a result, in the refrigeration cycle device 100, the pressure increase of the first refrigerant is suppressed more effectively, so that the amount of the refrigerant blown out to the outside of the first refrigerant circuit 10 can be reduced.

In the refrigeration cycle device 100, the first refrigerant circuit 10 further includes a pump 3 that sends out the first refrigerant. The first refrigerant circulates in order through the pump 3, the second heat exchanger 2, the first heat exchanger 1, and the receiver 4. The first part P1 is a part of the refrigerant flow path 12 that connects between the first heat exchanger 1 and the pump 3, more specifically, between the receiver 4 and the pump 3 in the first refrigerant flow path. Is.

In the refrigeration cycle device 100, the first refrigerant contains carbon dioxide. The withstand voltage of the first refrigerant circuit 10 is set lower than the pressure of the first refrigerant at room temperature. Therefore, the manufacturing cost of the refrigerating cycle device 100 is lower than the manufacturing cost of the refrigerating cycle device in which the withstand voltage of the first refrigerant circuit is set higher than the pressure of the first refrigerant at room temperature.

In the refrigeration cycle device 100, the first refrigerant circuit 10 may include a plurality of second heat exchangers 2 connected in parallel with each other.

Further, in the refrigeration cycle device 100, the outlet of the outlet 5 is arranged above the outer peripheral surface of the second portion P2, and may be provided so as to blow out the first refrigerant downward. In this case, the central axis of the blowout port of the blowout portion 5 intersects the horizontal direction, for example, along the vertical direction.

Embodiment 2.
As shown in FIG. 2, the refrigerating cycle apparatus 101 according to the second embodiment has basically the same configuration as the refrigerating cycle apparatus 100 according to the first embodiment, but the blowout portion 5 is a first heat exchanger. It differs from the refrigeration cycle apparatus 100 in that it is provided so as to blow out on the outer peripheral surface of the first upper flow path 1b of 1.

The blowout portion 5 is connected to the refrigerant flow path 12 and is arranged so as to face the outer peripheral surface of the first upper flow path 1b of the first heat exchanger 1. When the pressure of the first refrigerant in the refrigerant flow path 12 becomes equal to or higher than a predetermined value, the blowout portion 5 transfers a part of the first refrigerant in the refrigerant flow path 12 to the first upper flow path of the first heat exchanger 1. Blow out on the outer peripheral surface of 1b. The blowout port of the blowout portion 5 is arranged above, for example, the outer peripheral surface of the first upper flow path 1b, and is provided so as to blow out the first refrigerant downward.

Since the refrigerating cycle device 101 has basically the same configuration as the refrigerating cycle device 100, the same effect as that of the refrigerating cycle device 100 can be obtained.

Embodiment 3.
As shown in FIG. 3, the refrigerating cycle apparatus 102 according to the third embodiment has basically the same configuration as the refrigerating cycle apparatus 100 according to the first embodiment, but the blowout portion 5 is a second heat exchanger. It differs from the refrigeration cycle device 100 in that it is provided so as to blow out on the outer peripheral surface of the second lower flow path 2b of 2.

The blowout portion 5 is connected to the refrigerant flow path 12 and is arranged so as to face the outer peripheral surface of the second lower flow path 2b of the second heat exchanger 2. When the pressure of the first refrigerant in the refrigerant flow path 12 becomes equal to or higher than a predetermined value, the blowout portion 5 uses a part of the first refrigerant in the refrigerant flow path 12 as the second lower flow path of the second heat exchanger 2. Blow out on the outer peripheral surface of 2b. The blowout port of the blowout portion 5 is arranged above, for example, the outer peripheral surface of the second lower flow path 2b, and is provided so as to blow out the first refrigerant downward.

Since the refrigerating cycle device 102 has basically the same configuration as the refrigerating cycle device 100, the same effect as that of the refrigerating cycle device 100 can be obtained.

Embodiment 4.
As shown in FIG. 4, the refrigerating cycle apparatus 103 according to the fourth embodiment has basically the same configuration as the refrigerating cycle apparatus 100 according to the first embodiment, but the blowing portion 5 is a refrigerant flow path 14. It differs from the refrigeration cycle device 100 in that it is provided so as to blow out on the outer peripheral surface.

The blowout portion 5 is connected to the refrigerant flow path 12 and is arranged so as to face the outer peripheral surface of the refrigerant flow path 14. When the pressure of the first refrigerant in the refrigerant flow path 12 becomes equal to or higher than a predetermined value, the blowout portion 5 blows out a part of the first refrigerant in the refrigerant flow path 12 to the outer peripheral surface of the refrigerant flow path 14.

Since the refrigerating cycle device 103 has basically the same configuration as the refrigerating cycle device 100, the same effect as that of the refrigerating cycle device 100 can be obtained.

Embodiment 5.
As shown in FIG. 5, the refrigerating cycle apparatus 104 according to the fifth embodiment has basically the same configuration as the refrigerating cycle apparatus 100 according to the first embodiment, but has the first heat of the first refrigerant circuit 10. It differs from the refrigeration cycle device 100 in that the exchanger 1, the blowout portion 5, and the second refrigerant circuit 20 are housed in the outdoor unit 31.

In the first refrigerant circuit 10, the pump 3 and the receiver 4 are also housed in the outdoor unit 31. In the first refrigerant circuit 10, the second heat exchanger 2 is housed in the indoor unit 32.

Since the refrigerating cycle device 104 has basically the same configuration as the refrigerating cycle device 100, the same effect as that of the refrigerating cycle device 100 can be obtained. Further, in the refrigerating cycle device 104, since the target material to which the first refrigerant is sprayed from the blowout portion 5 and the blowout portion 5 is housed in the outdoor unit 31, the first refrigerant blown out from the blowout portion 5 does not scatter indoors. ..

The refrigerating cycle device 104 is the refrigerating cycle device 101 or the refrigerating cycle device 104 except that the first heat exchanger 1 and the blowing portion 5 of the first refrigerant circuit 10 and the second refrigerant circuit 20 are housed in the outdoor unit 31. It may have the same configuration as the cycle device 103.

Embodiment 6.
As shown in FIG. 6, the refrigerating cycle device 105 according to the sixth embodiment has basically the same configuration as the refrigerating cycle device 104 according to the fifth embodiment, but is housed in the outdoor unit 31. It differs from the refrigeration cycle device 105 in that it further includes a case 40 that surrounds the blowout portion 5 and the outer peripheral surface of the second portion P2.

The case 40 may be provided so as to surround at least the safety valve 5b of the blowout portion 5 and the outer peripheral surface of the second portion P2. For example, the pipeline 5a and the safety valve 5b of the blowout portion 5 and the second portion may be provided. It is provided so as to surround the outer peripheral surface of P2. The case 40 is arranged below the insertion hole 41 through which the refrigerant flow path 11 is passed, the insertion hole 42 through which the refrigerant flow path 12 is passed, and the receiver 4, the insertion hole 41, and the insertion hole 42. Includes the dish portion 43. The case 40 prevents the first refrigerant blown out from the blowout portion 5 from scattering. The dish portion 43 temporarily stores the first refrigerant blown out from the blowout portion 5.

Since the refrigerating cycle device 105 has basically the same configuration as the refrigerating cycle device 104, the same effect as that of the refrigerating cycle device 100 can be obtained. Further, in the refrigerating cycle device 105, the case 40 prevents the refrigerant blown out from the blown-out portion 5 from scattering, and temporarily stores the refrigerant blown out from the blown-out portion 5. Therefore, in the refrigerating cycle device 105, it is easier to recover the first refrigerant blown out from the blowing portion 5 as compared with the refrigerating cycle device 104 not provided with the case 40.

In the refrigeration cycle device 105 according to the sixth embodiment, the first heat exchanger 1, the blowout portion 5, and the second refrigerant circuit 20 of the first refrigerant circuit 10 are housed in the outdoor unit 31, and the case. It may have the same configuration as any of the refrigeration cycle devices 101 to 103 except that it includes 40. When the blowout portion 5 blows out the first refrigerant to the outer peripheral surface of the first upper flow path 1b of the first heat exchanger 1, the case 40 surrounds the outer peripheral surface of the blowout portion 5 and the first upper flow path 1b. When the blowout portion 5 blows out the first refrigerant to the outer peripheral surface of the second lower flow path 2b of the second heat exchanger 2, the case 40 surrounds the outer peripheral surface of the blowout portion 5 and the second lower flow path 2b. When the blowout portion 5 blows out the first refrigerant to the outer peripheral surface of the refrigerant flow path 14, the case 40 surrounds the blowout portion 5 and the outer peripheral surface of the refrigerant flow path 14.

Embodiment 7.
As shown in FIG. 7, the refrigerating cycle apparatus 106 according to the seventh embodiment has basically the same configuration as the refrigerating cycle apparatus 101 according to the second embodiment, but the first refrigerant circuit 10 has a receiver 4. It differs from the refrigeration cycle device 101 in that it does not include it.

The first refrigerant circuit 10 includes a first heat exchanger 1, a second heat exchanger 2, and a pump 3. The first refrigerant flow path of the first refrigerant circuit 10 includes a refrigerant flow path 15 connecting between the first lower flow path 1a of the first heat exchanger 1 and the pump 3, and the pump 3 and the second heat exchanger 2. It has a refrigerant flow path 13 connected to the second upper flow path 2a of the above. The refrigerant flow path 15 is a portion through which the first refrigerant in a liquid state flows during normal operation of the refrigeration cycle device 106.

The blowout portion 5 is connected to the refrigerant flow path 15 and is arranged so as to face the outer peripheral surface of the first upper flow path 1b of the first heat exchanger 1. When the pressure of the first refrigerant in the refrigerant flow path 15 becomes equal to or higher than a predetermined value, the blowout portion 5 transfers a part of the first refrigerant in the refrigerant flow path 15 to the first upper flow path of the first heat exchanger 1. Blow out on the outer peripheral surface of 1b.

Since the refrigeration cycle device 106 has basically the same configuration as the refrigeration cycle device 101, it can exert the same effect as the refrigeration cycle device 101.

The refrigerating cycle device 106 may have the same configuration as the refrigerating cycle device 102, except that the first refrigerant circuit 10 does not include the receiver 4. Further, in the refrigeration cycle device 106, similarly to the

refrigeration cycle devices

104 and 105, the first heat exchanger 1 and the blowout portion 5 of the first refrigerant circuit 10 and the second refrigerant circuit 20 are housed in the outdoor unit 31. May be good. Further, the refrigerating cycle device 106 may further include a case 40, similarly to the refrigerating cycle device 105.

Embodiment 8.
As shown in FIG. 8, the refrigerating cycle apparatus 107 according to the eighth embodiment has basically the same configuration as the refrigerating cycle apparatus 100 according to the first embodiment, but the first refrigerant circuit 10 is attached to the pump 3. It differs from the refrigeration cycle apparatus 100 in that it includes the first compressor 6 instead.

The first refrigerant circuit 10 includes a first compressor 6, a first heat exchanger 1, a receiver 4, an expansion valve 7, and a second heat exchanger 2. The first compressor 6 compresses the first refrigerant. In the expansion valve 7, the first refrigerant expands. The first compressor 6 is arranged in the second refrigerant flow path. The expansion valve 7 is arranged in the first refrigerant flow path. The first refrigerant circulates through the first compressor 6, the first heat exchanger 1, the receiver 4, the expansion valve 7, and the second heat exchanger 2 in the order described.

The first refrigerant flow path of the first refrigerant circuit 10 is a refrigerant flow path 11 connecting between the first lower flow path 1a of the first heat exchanger 1 and the receiver 4, and between the receiver 4 and the expansion valve 7. It has a refrigerant flow path 16 to be connected, and a refrigerant flow path 17 to connect between the expansion valve 7 and the second upper flow path 2a of the second heat exchanger 2. The second refrigerant flow path of the first refrigerant circuit 10 is a refrigerant flow path 18 connecting between the second lower flow path 2b of the second heat exchanger 2 and the suction port of the first compressor 6, and the first compression. It has a refrigerant flow path 19 that connects the discharge port of the machine 6 and the first upper flow path 1b of the first heat exchanger 1.

The blowout portion 5 is connected to the refrigerant flow path 16 of the first refrigerant flow path. The blowing portion 5 blows out the first refrigerant to, for example, the outer peripheral surface of the upper portion 4b of the receiver 4.

Since the refrigerating cycle device 107 has basically the same configuration as the refrigerating cycle device 100, the same effect as that of the refrigerating cycle device 100 can be obtained.

The refrigeration cycle device 107 may have the same configuration as any of the refrigeration cycle devices 101 to 106, except that the first refrigerant circuit 10 includes the first compressor 6 and the expansion valve 7. The blowout portion 5 of the refrigeration cycle device 107 may be provided so as to blow out the first refrigerant to a part of the second refrigerant flow path.

In the refrigeration cycle devices 100 to 107 shown in FIGS. 1 to 8, the outlet side opening of the safety valve 5b constitutes the outlet of the outlet 5, but the present invention is not limited to this. The blowout portion 5 of the refrigeration cycle devices 100 to 107 may further include a nozzle connected to the outlet side opening of the safety valve 5b. The nozzle has an inlet side opening connected to the outlet side opening of the safety valve 5b, and an outlet side opening arranged so as to face the outer peripheral surface of the second portion P2 at a distance from each other. .. In this case, the outlet-side opening of the nozzle constitutes the outlet of the blowout portion 5. The timing at which the blowing unit 5 blows out the first refrigerant is controlled by, for example, a control unit. For example, when the pressure of the first refrigerant measured by the pressure sensor becomes equal to or higher than a predetermined value, the control unit instructs the blowout unit 5 to blow out the first refrigerant. The pressure sensor may be provided to measure the pressure of the first refrigerant in the first refrigerant flow path, or may be provided to measure the pressure of the first refrigerant in the second refrigerant flow path. May be good.

Although the embodiment of the present disclosure has been described as described above, it is also possible to modify the above-described embodiment in various ways. Further, the scope of the present disclosure is not limited to the above-described embodiment. The scope of the present disclosure is indicated by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 1st heat exchanger, 1a 1st lower flow path, 1b 1st upper flow path, 2 2nd heat exchanger, 2a 2nd upper flow path, 2b 2nd lower flow path, 3 pump, 4 receiver, 4a lower part, 4b upper part Part, 5 blowout part, 5a pipeline, 5b safety valve, 6th first compressor, 7,23 expansion valve, 10th first refrigerant circuit, 11,12,13,14,15,16,17,18,19 refrigerant flow Road, 20 2nd refrigerant circuit, 21 compressor, 22 3rd heat exchanger, 31 outdoor unit, 32 indoor unit, 40 case, 41, 42 insertion hole, 43 dish part, 100, 101, 102, 103, 104, 105, 106, 107 Refrigerating cycle device.

Claims

The first refrigerant circuit in which the first refrigerant circulates,
It is equipped with a second refrigerant circuit in which the second refrigerant circulates.
The first refrigerant circuit and the second refrigerant circuit include a first heat exchanger that exchanges heat between the first refrigerant and the second refrigerant.
The first refrigerant circuit is connected to the first part, which is a part of the first refrigerant circuit, the second part, which is another part of the first refrigerant circuit, and the first part. Further includes a blowout portion arranged so as to face the outer peripheral surface of the second portion, and includes a blowout portion.
The blowing portion is a refrigerating cycle device that blows out the first refrigerant to the outer peripheral surface when the pressure of the first refrigerant in the first refrigerant circuit becomes a predetermined value or more.
The first part is a part through which the first refrigerant in a liquid state is circulated or stored.
The second part is a part through which the first refrigerant in a gas state is circulated or stored.
The refrigerating cycle apparatus according to claim 1, wherein the blowing portion blows out the first refrigerant of the first portion to the outer peripheral surface when the pressure of the first refrigerant becomes equal to or higher than the predetermined value.
In the first heat exchanger, the first refrigerant condenses and the second refrigerant evaporates.
The first refrigerant circuit further includes a second heat exchanger in which the first refrigerant evaporates.
The first refrigerant circuit includes a first refrigerant flow path from a portion located on the downstream side of the first heat exchanger to a portion located on the upstream side of the second heat exchanger, and the second heat exchanger. It has a second refrigerant flow path from a portion located on the downstream side to a portion located on the upstream side of the first heat exchanger.
The first refrigerant flow path is arranged between a portion located on the downstream side of the first heat exchanger and a portion located on the upstream side of the second heat exchanger, and the first refrigerant is stored. Including receivers
The first part is a part of the first refrigerant flow path, and is a part of the first refrigerant flow path.
The refrigeration cycle apparatus according to claim 2, wherein the second part is a portion located above the receiver.
In the first heat exchanger, the first refrigerant condenses and the second refrigerant evaporates.
The first refrigerant circuit further includes a second heat exchanger in which the first refrigerant evaporates.
The first refrigerant circuit includes a first refrigerant flow path from a portion located on the downstream side of the first heat exchanger to a portion located on the upstream side of the second heat exchanger, and the second heat exchanger. It has a second refrigerant flow path from a portion located on the downstream side to a portion located on the upstream side of the first heat exchanger.
The first part is a part of the first refrigerant flow path.
The refrigerating cycle apparatus according to claim 2, wherein the second part is a part of the second refrigerant flow path.
The first refrigerant circuit further includes a pump that delivers the first refrigerant.
The first refrigerant circulates in order through the pump, the second heat exchanger, and the first heat exchanger.
The refrigeration cycle apparatus according to claim 3 or 4, wherein the first part is a portion of the first refrigerant flow path that connects the first heat exchanger and the pump.
The first refrigerant circuit further includes a first compressor that compresses the first refrigerant, and an expansion valve in which the first refrigerant expands.
The first refrigerant circulates in this order through the first compressor, the first heat exchanger, the expansion valve, and the second heat exchanger.
The refrigerating cycle apparatus according to claim 3 or 4, wherein the first part is a portion of the first refrigerant flow path that connects the first heat exchanger and the expansion valve.
The refrigerating cycle apparatus according to any one of claims 1 to 6, wherein the blowing portion is arranged above the outer peripheral surface and blows out the first refrigerant downward.
The refrigerating cycle apparatus according to any one of claims 1 to 7, wherein the first heat exchanger and the blowing portion of the first refrigerant circuit, and the second refrigerant circuit are housed in an outdoor unit.
The refrigerating cycle apparatus according to claim 8, further comprising a case housed in the outdoor unit and surrounding the blowout portion and the outer peripheral surface of the second portion.
When the pressure of the first refrigerant is equal to or less than the predetermined value, the first refrigerant circuit is sealed, and the first refrigerant is enclosed in the first refrigerant circuit.
Claims 1 to 9, wherein the first refrigerant is blown out to the outer peripheral surface arranged outside the first refrigerant circuit only when the pressure of the first refrigerant becomes equal to or higher than the predetermined value. The refrigerating cycle apparatus according to any one item.
The refrigeration cycle apparatus according to any one of claims 1 to 10, wherein the first refrigerant contains carbon dioxide.
The blowout portion includes a safety valve and includes a safety valve.
Any of claims 1 to 11, wherein the blowing portion blows out the first refrigerant of the first part to the outer peripheral surface when the pressure of the first refrigerant of the first part becomes equal to or higher than the predetermined value. The refrigerating cycle apparatus according to item 1.